/*----------------------------------------------------------------------
| AP4_IsmaTrackEncrypter::ProcessTrack
+---------------------------------------------------------------------*/
AP4_Result
AP4_IsmaTrackEncrypter::ProcessTrack()
{
// sinf container
AP4_ContainerAtom* sinf = new AP4_ContainerAtom(AP4_ATOM_TYPE_SINF);
// original format
AP4_FrmaAtom* frma = new AP4_FrmaAtom(m_SampleEntry->GetType());
// scheme
AP4_SchmAtom* schm = new AP4_SchmAtom(AP4_ISMACRYP_SCHEME_TYPE_IAEC, 1);
// scheme info
AP4_ContainerAtom* schi = new AP4_ContainerAtom(AP4_ATOM_TYPE_SCHI);
AP4_IkmsAtom* ikms = new AP4_IkmsAtom(m_KmsUri.c_str());
AP4_IsfmAtom* isfm = new AP4_IsfmAtom(false, 0, 4);
// populate the schi container
schi->AddChild(ikms);
schi->AddChild(isfm);
// populate the sinf container
sinf->AddChild(frma);
sinf->AddChild(schm);
sinf->AddChild(schi);
// add the sinf atom to the sample description
m_SampleEntry->AddChild(sinf);
// change the atom type of the sample description
m_SampleEntry->SetType(m_Format);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_OmaDcfAtomDecrypter::DecryptAtoms
+---------------------------------------------------------------------*/
AP4_Result
AP4_OmaDcfAtomDecrypter::DecryptAtoms(AP4_AtomParent& atoms,
AP4_Processor::ProgressListener* /*listener*/,
AP4_BlockCipherFactory* block_cipher_factory,
AP4_ProtectionKeyMap& key_map)
{
// default factory
if (block_cipher_factory == NULL) {
block_cipher_factory = &AP4_DefaultBlockCipherFactory::Instance;
}
unsigned int index = 1;
for (AP4_List<AP4_Atom>::Item* item = atoms.GetChildren().FirstItem();
item;
item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() != AP4_ATOM_TYPE_ODRM) continue;
// check that we have the key
const AP4_DataBuffer* key = key_map.GetKey(index++);
if (key == NULL) return AP4_ERROR_INVALID_PARAMETERS;
// check that we have all the atoms we need
AP4_ContainerAtom* odrm = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
if (odrm == NULL) continue; // not enough info
AP4_OdheAtom* odhe = AP4_DYNAMIC_CAST(AP4_OdheAtom, odrm->GetChild(AP4_ATOM_TYPE_ODHE));
if (odhe == NULL) continue; // not enough info
AP4_OddaAtom* odda = AP4_DYNAMIC_CAST(AP4_OddaAtom, odrm->GetChild(AP4_ATOM_TYPE_ODDA));;
if (odda == NULL) continue; // not enough info
AP4_OhdrAtom* ohdr = AP4_DYNAMIC_CAST(AP4_OhdrAtom, odhe->GetChild(AP4_ATOM_TYPE_OHDR));
if (ohdr == NULL) continue; // not enough info
// do nothing if the atom is not encrypted
if (ohdr->GetEncryptionMethod() == AP4_OMA_DCF_ENCRYPTION_METHOD_NULL) {
continue;
}
// create the byte stream
AP4_ByteStream* cipher_stream = NULL;
AP4_Result result = CreateDecryptingStream(*odrm,
key->GetData(),
key->GetDataSize(),
block_cipher_factory,
cipher_stream);
if (AP4_SUCCEEDED(result)) {
// replace the odda atom's payload with the decrypted stream
odda->SetEncryptedPayload(*cipher_stream, ohdr->GetPlaintextLength());
cipher_stream->Release();
// the atom will now be in the clear
ohdr->SetEncryptionMethod(AP4_OMA_DCF_ENCRYPTION_METHOD_NULL);
ohdr->SetPaddingScheme(AP4_OMA_DCF_PADDING_SCHEME_NONE);
}
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_CompactingProcessor::TrackHandler::ProcessTrack
+---------------------------------------------------------------------*/
AP4_Result
AP4_CompactingProcessor::TrackHandler::ProcessTrack()
{
// find the stsz atom
AP4_ContainerAtom* stbl = AP4_DYNAMIC_CAST(AP4_ContainerAtom, m_TrakAtom->FindChild("mdia/minf/stbl"));
if (stbl == NULL) return AP4_SUCCESS;
AP4_StszAtom* stsz = AP4_DYNAMIC_CAST(AP4_StszAtom, stbl->GetChild(AP4_ATOM_TYPE_STSZ));
if (stsz == NULL) return AP4_SUCCESS;
// check if we can reduce the size of stsz by changing it to stz2
AP4_UI32 max_size = 0;
for (unsigned int i=1; i<=stsz->GetSampleCount(); i++) {
AP4_Size sample_size;
stsz->GetSampleSize(i, sample_size);
if (sample_size > max_size) {
max_size = sample_size;
}
}
AP4_UI08 field_size = 0;
if (max_size <= 0xFF) {
field_size = 1;
} else if (max_size <= 0xFFFF) {
field_size = 2;
}
if (m_Outer.m_Verbose) printf("Track %d: ", m_TrakAtom->GetId());
if (field_size == 0) {
if (m_Outer.m_Verbose) {
printf("no stz2 reduction possible\n");
}
return AP4_SUCCESS;
} else {
if (m_Outer.m_Verbose) {
unsigned int reduction = (4-field_size)*stsz->GetSampleCount();
printf("stz2 reduction = %d bytes\n", reduction);
m_Outer.m_SizeReduction += reduction;
}
}
// detach the original stsz atom so we can destroy it later
m_StszAtom = stsz;
stsz->Detach();
// create an stz2 atom and populate its entries
AP4_Stz2Atom* stz2 = new AP4_Stz2Atom(field_size);
for (unsigned int i=1; i<=m_StszAtom->GetSampleCount(); i++) {
AP4_Size sample_size;
m_StszAtom->GetSampleSize(i, sample_size);
stz2->AddEntry(sample_size);
}
stbl->AddChild(stz2);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AutoDetectAudioFragmentDuration
+---------------------------------------------------------------------*/
static unsigned int
AutoDetectAudioFragmentDuration(AP4_ByteStream& stream, TrackCursor* cursor)
{
// remember where we are in the stream
AP4_Position where = 0;
stream.Tell(where);
AP4_LargeSize stream_size = 0;
stream.GetSize(stream_size);
AP4_LargeSize bytes_available = stream_size-where;
AP4_UI64 fragment_count = 0;
AP4_UI32 last_fragment_size = 0;
AP4_Atom* atom = NULL;
while (AP4_SUCCEEDED(AP4_DefaultAtomFactory::Instance.CreateAtomFromStream(stream, bytes_available, atom))) {
if (atom && atom->GetType() == AP4_ATOM_TYPE_MOOF) {
AP4_ContainerAtom* moof = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, moof->FindChild("traf/tfhd"));
if (tfhd && tfhd->GetTrackId() == cursor->m_Track->GetId()) {
++fragment_count;
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, moof->FindChild("traf/trun"));
if (trun) {
last_fragment_size = trun->GetEntries().ItemCount();
}
}
}
delete atom;
atom = NULL;
}
// restore the stream to its original position
stream.Seek(where);
// decide if we can infer an fragment size
if (fragment_count == 0 || cursor->m_Samples->GetSampleCount() == 0) {
return 0;
}
// don't count the last fragment if we have more than one
if (fragment_count > 1 && last_fragment_size) {
--fragment_count;
}
if (fragment_count <= 1 || cursor->m_Samples->GetSampleCount() < last_fragment_size) {
last_fragment_size = 0;
}
AP4_Sample sample;
AP4_UI64 total_duration = 0;
for (unsigned int i=0; i<cursor->m_Samples->GetSampleCount()-last_fragment_size; i++) {
cursor->m_Samples->GetSample(i, sample);
total_duration += sample.GetDuration();
}
return (unsigned int)AP4_ConvertTime(total_duration/fragment_count, cursor->m_Track->GetMediaTimeScale(), 1000);
}
/*----------------------------------------------------------------------
| AP4_HintTrack::SetSdpText
+---------------------------------------------------------------------*/
void
AP4_HintTrack::SetSdpText(const char* text)
{
// build an sdp atom
AP4_SdpAtom* sdp = DNew AP4_SdpAtom(text);
// build the hnti
AP4_ContainerAtom* hnti = DNew AP4_ContainerAtom(AP4_ATOM_TYPE_HNTI);
hnti->AddChild(sdp);
// check if there's already a user data atom
AP4_ContainerAtom* udta = dynamic_cast<AP4_ContainerAtom*>(m_TrakAtom->FindChild("udta"));
if (udta == NULL) {
// otherwise create it
udta = DNew AP4_ContainerAtom(AP4_ATOM_TYPE_UDTA);
m_TrakAtom->AddChild(udta);
}
udta->AddChild(hnti);
}
/*----------------------------------------------------------------------
| AP4_OmaDcfTrackEncrypter::ProcessTrack
+---------------------------------------------------------------------*/
AP4_Result
AP4_OmaDcfTrackEncrypter::ProcessTrack()
{
// original format
AP4_FrmaAtom* frma = new AP4_FrmaAtom(m_SampleEntry->GetType());
// scheme info
AP4_OdafAtom* odaf = new AP4_OdafAtom(true, 0, AP4_CIPHER_BLOCK_SIZE);
AP4_OhdrAtom* ohdr = new AP4_OhdrAtom(m_CipherMode,
m_CipherPadding,
0,
m_ContentId.GetChars(),
m_RightsIssuerUrl.GetChars(),
m_TextualHeaders.GetData(),
m_TextualHeaders.GetDataSize());
AP4_SchmAtom* schm = new AP4_SchmAtom(AP4_PROTECTION_SCHEME_TYPE_OMA,
AP4_PROTECTION_SCHEME_VERSION_OMA_20);
// populate the odkm container
AP4_ContainerAtom* odkm = new AP4_ContainerAtom(AP4_ATOM_TYPE_ODKM, (AP4_UI32)0, (AP4_UI32)0);
odkm->AddChild(odaf);
odkm->AddChild(ohdr);
// populate the schi container
AP4_ContainerAtom* schi = new AP4_ContainerAtom(AP4_ATOM_TYPE_SCHI);
schi->AddChild(odkm);
// populate the sinf container
AP4_ContainerAtom* sinf = new AP4_ContainerAtom(AP4_ATOM_TYPE_SINF);
sinf->AddChild(frma);
sinf->AddChild(schm);
sinf->AddChild(schi);
// add the sinf atom to the sample description
m_SampleEntry->AddChild(sinf);
// change the atom type of the sample description
m_SampleEntry->SetType(m_Format);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_Processor::MuxStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_Processor::MuxStream(
AP4_Array<AP4_ByteStream *> &input,
AP4_ByteStream& output,
AP4_UI08 partitions,
AP4_AtomFactory& atom_factory)
{
AP4_Result result;
AP4_UI64 stream_offset = 0;
if (partitions & 1)
{
// read all atoms.
// keep all atoms except [mdat]
// keep a ref to [moov]
// put [moof] atoms in a separate list
AP4_AtomParent top_level;
AP4_Array<AP4_MoovAtom*> moov;
AP4_Size track_count(0);
for(AP4_Size streamid(0); streamid < input.ItemCount(); ++streamid)
{
for (AP4_Atom* atom = NULL; AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(*input[streamid], atom)); input[streamid]->Tell(stream_offset))
{
if (atom->GetType() == AP4_ATOM_TYPE_MFRA) {
delete atom;
continue;
}
else if (atom->GetType() == AP4_ATOM_TYPE_SIDX) {
delete atom;
continue;
}
else if (atom->GetType() == AP4_ATOM_TYPE_SSIX) {
delete atom;
continue;
}
if (streamid == 0)
top_level.AddChild(atom);
else if (atom->GetType() != AP4_ATOM_TYPE_MOOV)
delete atom;
if (atom->GetType() == AP4_ATOM_TYPE_MOOV)
{
moov.Append(AP4_DYNAMIC_CAST(AP4_MoovAtom,atom));
break;
}
}
if (moov.ItemCount() == streamid)
return AP4_ERROR_INVALID_FORMAT;
while (AP4_SUCCEEDED(moov[streamid]->DeleteChild(AP4_ATOM_TYPE_PSSH, 0)));
// Remove tracks we cannot handle
for (AP4_List<AP4_TrakAtom>::Item *item(moov[streamid]->GetTrakAtoms().FirstItem()); item;)
if (!item->GetData()->FindChild("mdia/minf/stbl"))
moov[streamid]->GetTrakAtoms().Remove(item);
else
item = item->GetNext();
track_count += moov[streamid]->GetTrakAtoms().ItemCount();
}
// initialize the processor
if (AP4_FAILED(result = Initialize(top_level, *input[0])))
return result;
// process the tracks if we have a moov atom
m_TrackData.SetItemCount(track_count);
m_StreamData.SetItemCount(input.ItemCount());
//NormalizeTREX(mvex, 0, m_TrackCounts[0], m_TrackCounts[1]);
AP4_Cardinal internal_index(0);
AP4_ContainerAtom *mvex_base(0);
AP4_List<AP4_TrakAtom>::Item *item = NULL;
for (AP4_Size streamid(0); streamid < input.ItemCount(); ++streamid)
{
m_StreamData[streamid].trackStart = internal_index;
m_StreamData[streamid].stream = input[streamid];
if (streamid)
moov[0]->AddTrakAtoms(moov[streamid]->GetTrakAtoms(), item);
else
item = moov[streamid]->GetTrakAtoms().FirstItem();
for (; item; item = item->GetNext())
{
PERTRACK &track_data(m_TrackData[internal_index]);
track_data.original_id = item->GetData()->GetId();
item->GetData()->SetId(track_data.new_id = internal_index + 1);
if (AP4_MdhdAtom* mdhd = AP4_DYNAMIC_CAST(AP4_MdhdAtom, item->GetData()->FindChild("mdia/mdhd")))
track_data.timescale = mdhd->GetTimeScale();
else
track_data.timescale = 1;
AP4_ContainerAtom *mvex = AP4_DYNAMIC_CAST(AP4_ContainerAtom, moov[streamid]->GetChild(AP4_ATOM_TYPE_MVEX, 0));
if (!mvex)
return AP4_ERROR_INVALID_FORMAT;
if (!item->GetData()->GetDuration())
{
AP4_MehdAtom *mehd(AP4_DYNAMIC_CAST(AP4_MehdAtom, mvex->GetChild(AP4_ATOM_TYPE_MEHD, 0)));
item->GetData()->SetDuration(mehd? mehd->GetDuration():0);
}
AP4_TrexAtom *trex(NULL);
unsigned int index(0);
for (; !trex && (trex = AP4_DYNAMIC_CAST(AP4_TrexAtom, mvex->GetChild(AP4_ATOM_TYPE_TREX, index++)));)
if(trex->GetTrackId() != track_data.original_id)
trex = NULL;
if (!trex)
return AP4_ERROR_INVALID_FORMAT;
if (mvex_base)
{
trex = AP4_DYNAMIC_CAST(AP4_TrexAtom, trex->Clone());
mvex_base->AddChild(trex);
}
else
mvex_base = mvex;
trex->SetTrackId(track_data.new_id);
track_data.track_handler = CreateTrackHandler(item->GetData(), trex);
track_data.track_handler->ProcessTrack();
track_data.streamId = streamid;
++m_StreamData[streamid].trackCount;
++internal_index;
}
}
// We don't need the other moovs anymore.....
moov.SetItemCount(1);
AP4_MvhdAtom *mvhd(AP4_DYNAMIC_CAST(AP4_MvhdAtom, moov[0]->GetChild(AP4_ATOM_TYPE_MVHD, 0)));
if (!mvhd->GetDuration())
{
AP4_MehdAtom *mehd(AP4_DYNAMIC_CAST(AP4_MehdAtom, mvex_base->GetChild(AP4_ATOM_TYPE_MEHD, 0)));
mvhd->SetDuration(mehd ? mehd->GetDuration() : 0);
}
// finalize the processor
Finalize(top_level);
// calculate the size of all atoms combined
AP4_UI64 atoms_size = 0;
top_level.GetChildren().Apply(AP4_AtomSizeAdder(atoms_size));
// write all atoms
top_level.GetChildren().Apply(AP4_AtomListWriter(output));
m_MoovAtom = moov[0];
m_MoovAtom->Detach();
}
if (partitions & 2)
{
// process the fragments, if any
result = AP4_SUCCESS;
AP4_Array<AP4_UI64> moof_positions, mdat_positions;
moof_positions.SetItemCount(input.ItemCount());
mdat_positions.SetItemCount(input.ItemCount());
for (;;)
{
AP4_ContainerAtom *moof = NULL;
AP4_UI32 track_index(0);
#if 0
for (AP4_Cardinal streamid(0); streamid < input.ItemCount(); ++streamid)
{
AP4_Atom* atom = NULL;
if (AP4_SUCCEEDED(input[streamid]->Tell(stream_offset)) && AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(*input[streamid], atom)))
{
if (atom->GetType() != AP4_ATOM_TYPE_MOOF)
return AP4_ERROR_INVALID_FORMAT;
moof_positions[streamid] = stream_offset;
mdat_positions[streamid] = stream_offset + atom->GetSize() + +AP4_ATOM_HEADER_SIZE;
if (moof)
{
int index(0);
for (; AP4_Atom* child = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom)->GetChild(AP4_ATOM_TYPE_TRAF, index++);)
moof->AddChild(child->Clone());
delete atom;
}
else
moof = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
NormalizeTRAF(AP4_DYNAMIC_CAST(AP4_ContainerAtom, moof), m_StreamData[streamid].trackStart,
m_StreamData[streamid].trackStart + m_StreamData[streamid].trackCount, track_index);
}
else
delete atom;
}
#else
double mindts(9999999999.0);
AP4_Cardinal nextStream(~0);
for (AP4_Cardinal track(0); track < m_TrackData.ItemCount(); ++track)
if ((double)m_TrackData[track].dts / m_TrackData[track].timescale < mindts)
{
mindts = (double)m_TrackData[track].dts / m_TrackData[track].timescale;
nextStream = m_TrackData[track].streamId;
}
AP4_Atom* atom = NULL;
if (AP4_SUCCEEDED(result = input[nextStream]->Tell(stream_offset)) && AP4_SUCCEEDED(result = atom_factory.CreateAtomFromStream(*input[nextStream], atom)))
{
if (atom->GetType() != AP4_ATOM_TYPE_MOOF)
return AP4_ERROR_INVALID_FORMAT;
} else if (atom)
return result;
moof_positions[nextStream] = stream_offset;
mdat_positions[nextStream] = stream_offset + atom->GetSize() + +AP4_ATOM_HEADER_SIZE;
moof = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
NormalizeTRAF(AP4_DYNAMIC_CAST(AP4_ContainerAtom, moof), m_StreamData[nextStream].trackStart,
m_StreamData[nextStream].trackStart + m_StreamData[nextStream].trackCount, track_index);
#endif
if (!moof)
break;
if (AP4_FAILED(result = ProcessFragment(moof, NULL, 0, output, moof_positions, mdat_positions)))
return result;
delete moof;
moof = NULL;
}
// cleanup
m_TrackData.Clear();
m_StreamData.Clear();
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_OmaDcfSampleDecrypter::Create
+---------------------------------------------------------------------*/
AP4_Result
AP4_OmaDcfSampleDecrypter::Create(AP4_ProtectedSampleDescription* sample_description,
const AP4_UI08* key,
AP4_Size key_size,
AP4_BlockCipherFactory* block_cipher_factory,
AP4_OmaDcfSampleDecrypter*& cipher)
{
// check the parameters
if (key == NULL || block_cipher_factory == NULL) {
return AP4_ERROR_INVALID_PARAMETERS;
}
// default return value
cipher = NULL;
// default factory
if (block_cipher_factory == NULL) {
block_cipher_factory = &AP4_DefaultBlockCipherFactory::Instance;
}
// get the scheme info atom
AP4_ContainerAtom* schi = sample_description->GetSchemeInfo()->GetSchiAtom();
if (schi == NULL) return AP4_ERROR_INVALID_FORMAT;
// get and check the cipher params
// NOTE: we only support an IV Length less than or equal to the cipher block size,
// and we don't know how to deal with a key indicator length != 0
AP4_OdafAtom* odaf = AP4_DYNAMIC_CAST(AP4_OdafAtom, schi->FindChild("odkm/odaf"));
if (odaf) {
if (odaf->GetIvLength() > AP4_CIPHER_BLOCK_SIZE) return AP4_ERROR_INVALID_FORMAT;
if (odaf->GetKeyIndicatorLength() != 0) return AP4_ERROR_INVALID_FORMAT;
}
// check the scheme details and create the cipher
AP4_OhdrAtom* ohdr = AP4_DYNAMIC_CAST(AP4_OhdrAtom, schi->FindChild("odkm/ohdr"));
if (ohdr == NULL) return AP4_ERROR_INVALID_FORMAT;
AP4_UI08 encryption_method = ohdr->GetEncryptionMethod();
if (encryption_method == AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CBC) {
// in CBC mode, we only support IVs of the same size as the cipher block size
if (odaf->GetIvLength() != AP4_CIPHER_BLOCK_SIZE) return AP4_ERROR_INVALID_FORMAT;
// require RFC_2630 padding
if (ohdr->GetPaddingScheme() != AP4_OMA_DCF_PADDING_SCHEME_RFC_2630) {
return AP4_ERROR_NOT_SUPPORTED;
}
// create the block cipher
AP4_BlockCipher* block_cipher = NULL;
AP4_Result result = block_cipher_factory->CreateCipher(AP4_BlockCipher::AES_128,
AP4_BlockCipher::DECRYPT,
AP4_BlockCipher::CBC,
NULL,
key,
key_size,
block_cipher);
if (AP4_FAILED(result)) return result;
// create the cipher
cipher = new AP4_OmaDcfCbcSampleDecrypter(block_cipher,
odaf->GetSelectiveEncryption());
return AP4_SUCCESS;
} else if (encryption_method == AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CTR) {
// require NONE padding
if (ohdr->GetPaddingScheme() != AP4_OMA_DCF_PADDING_SCHEME_NONE) {
return AP4_ERROR_INVALID_FORMAT;
}
// create the block cipher
AP4_BlockCipher* block_cipher = NULL;
AP4_BlockCipher::CtrParams ctr_params;
ctr_params.counter_size = odaf->GetIvLength();
AP4_Result result = block_cipher_factory->CreateCipher(AP4_BlockCipher::AES_128,
AP4_BlockCipher::DECRYPT,
AP4_BlockCipher::CTR,
&ctr_params,
key,
key_size,
block_cipher);
if (AP4_FAILED(result)) return result;
// create the cipher
cipher = new AP4_OmaDcfCtrSampleDecrypter(block_cipher,
odaf->GetIvLength(),
odaf->GetSelectiveEncryption());
return AP4_SUCCESS;
} else {
return AP4_ERROR_NOT_SUPPORTED;
}
}
/*----------------------------------------------------------------------
| Fragment
+---------------------------------------------------------------------*/
static void
Fragment(AP4_File& input_file,
AP4_ByteStream& output_stream,
unsigned int fragment_duration,
AP4_UI32 timescale)
{
AP4_Result result;
AP4_Movie* input_movie = input_file.GetMovie();
if (input_movie == NULL) {
fprintf(stderr, "ERROR: no moov found in the input file\n");
return;
}
// create the output file object
AP4_Movie* output_movie = new AP4_Movie(1000);
// create an mvex container
AP4_ContainerAtom* mvex = new AP4_ContainerAtom(AP4_ATOM_TYPE_MVEX);
AP4_MehdAtom* mehd = new AP4_MehdAtom(0);
mvex->AddChild(mehd);
// create a cusor list to keep track of the tracks we will read from
AP4_Array<TrackCursor*> cursors;
// add an output track for each track in the input file
for (AP4_List<AP4_Track>::Item* track_item = input_movie->GetTracks().FirstItem();
track_item;
track_item = track_item->GetNext()) {
AP4_Track* track = track_item->GetData();
TrackCursor* cursor = new TrackCursor();
cursor->m_TrackId = track->GetId();
cursor->m_Tfra->SetTrackId(track->GetId());
cursors.Append(cursor);
// create a sample table (with no samples) to hold the sample description
AP4_SyntheticSampleTable* sample_table = new AP4_SyntheticSampleTable();
for (unsigned int i=0; i<track->GetSampleDescriptionCount(); i++) {
AP4_SampleDescription* sample_description = track->GetSampleDescription(i);
sample_table->AddSampleDescription(sample_description, false);
}
// create the track
AP4_Track* output_track = new AP4_Track(track->GetType(),
sample_table,
cursor->m_TrackId,
timescale?timescale:1000,
AP4_ConvertTime(track->GetDuration(),
input_movie->GetTimeScale(),
timescale?timescale:1000),
timescale?timescale:track->GetMediaTimeScale(),
0,//track->GetMediaDuration(),
track->GetTrackLanguage(),
track->GetWidth(),
track->GetHeight());
output_movie->AddTrack(output_track);
result = cursor->SetTrack(track);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to read sample (%d)\n", result);
return;
}
// add a trex entry to the mvex container
AP4_TrexAtom* trex = new AP4_TrexAtom(cursor->m_TrackId,
1,
0,
0,
0);
mvex->AddChild(trex);
}
if (cursors.ItemCount() == 0) {
fprintf(stderr, "ERROR: no track found\n");
return;
}
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (cursors[i]->m_Track->GetType() == AP4_Track::TYPE_VIDEO) {
cursors[i]->m_TargetDuration = AP4_ConvertTime(fragment_duration>AP4_FRAGMENTER_FRAGMENT_DURATION_TOLERANCE ?
fragment_duration-AP4_FRAGMENTER_FRAGMENT_DURATION_TOLERANCE : 0,
1000,
cursors[i]->m_Track->GetMediaTimeScale());
} else {
cursors[i]->m_TargetDuration = AP4_ConvertTime(fragment_duration,
1000,
cursors[i]->m_Track->GetMediaTimeScale());
}
}
// update the mehd duration
mehd->SetDuration(output_movie->GetDuration());
// the mvex container to the moov container
output_movie->GetMoovAtom()->AddChild(mvex);
// write the ftyp atom
AP4_FtypAtom* ftyp = input_file.GetFileType();
if (ftyp) {
ftyp->Write(output_stream);
}
// write the moov atom
output_movie->GetMoovAtom()->Write(output_stream);
// write all the fragments
unsigned int sequence_number = 1;
for(;;) {
// select the next track to read from
TrackCursor* cursor = NULL;
AP4_UI64 min_dts = (AP4_UI64)(-1);
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (cursors[i]->m_Eos) continue;
AP4_UI64 dts = AP4_ConvertTime(cursors[i]->m_Sample.GetDts(),
cursors[i]->m_Track->GetMediaTimeScale(),
AP4_FRAGMENTER_BASE_TIMESCALE);
if (dts < min_dts) {
min_dts = dts;
cursor = cursors[i];
}
}
if (cursor == NULL) break; // all done
// compute the target end for the segment
cursor->m_EndDts = cursor->m_Sample.GetDts()+cursor->m_TargetDuration;
// emit a fragment for the selected track
if (Options.verbosity > 0) {
printf("fragment: track ID %d ", cursor->m_Track->GetId());
}
// remember the time and position of this fragment
AP4_Position moof_offset = 0;
output_stream.Tell(moof_offset);
cursor->m_Tfra->AddEntry(cursor->m_Timestamp, moof_offset);
// decide which sample description index to use
// (this is not very sophisticated, we only look at the sample description
// index of the first sample in the group, which may not be correct. This
// should be fixed later)
unsigned int sample_desc_index = cursor->m_Sample.GetDescriptionIndex();
unsigned int tfhd_flags = AP4_TFHD_FLAG_DEFAULT_BASE_IS_MOOF;
if (sample_desc_index > 0) {
tfhd_flags |= AP4_TFHD_FLAG_SAMPLE_DESCRIPTION_INDEX_PRESENT;
}
if (cursor->m_Track->GetType() == AP4_Track::TYPE_VIDEO) {
tfhd_flags |= AP4_TFHD_FLAG_DEFAULT_SAMPLE_FLAGS_PRESENT;
}
// setup the moof structure
AP4_ContainerAtom* moof = new AP4_ContainerAtom(AP4_ATOM_TYPE_MOOF);
AP4_MfhdAtom* mfhd = new AP4_MfhdAtom(sequence_number++);
moof->AddChild(mfhd);
AP4_ContainerAtom* traf = new AP4_ContainerAtom(AP4_ATOM_TYPE_TRAF);
AP4_TfhdAtom* tfhd = new AP4_TfhdAtom(tfhd_flags,
cursor->m_TrackId,
0,
sample_desc_index+1,
0,
0,
0);
if (tfhd_flags & AP4_TFHD_FLAG_DEFAULT_SAMPLE_FLAGS_PRESENT) {
tfhd->SetDefaultSampleFlags(0x1010000); // sample_is_non_sync_sample=1, sample_depends_on=1 (not I frame)
}
traf->AddChild(tfhd);
AP4_TfdtAtom* tfdt = new AP4_TfdtAtom(1, cursor->m_Timestamp);
traf->AddChild(tfdt);
AP4_UI32 trun_flags = AP4_TRUN_FLAG_DATA_OFFSET_PRESENT |
AP4_TRUN_FLAG_SAMPLE_DURATION_PRESENT |
AP4_TRUN_FLAG_SAMPLE_SIZE_PRESENT;
AP4_UI32 first_sample_flags = 0;
if (cursor->m_Track->GetType() == AP4_Track::TYPE_VIDEO) {
trun_flags |= AP4_TRUN_FLAG_FIRST_SAMPLE_FLAGS_PRESENT;
first_sample_flags = 0x2000000; // sample_depends_on=2 (I frame)
}
AP4_TrunAtom* trun = new AP4_TrunAtom(trun_flags, 0, first_sample_flags);
traf->AddChild(trun);
moof->AddChild(traf);
// decide which samples go in this fragment
AP4_Array<AP4_UI32> sample_indexes;
unsigned int sample_count = 0;
AP4_Array<AP4_TrunAtom::Entry> trun_entries;
AP4_UI32 mdat_size = AP4_ATOM_HEADER_SIZE;
for (;;) {
// if we have one non-zero CTS delta, we'll need to express it
if (cursor->m_Sample.GetCtsDelta()) {
trun->SetFlags(trun->GetFlags() | AP4_TRUN_FLAG_SAMPLE_COMPOSITION_TIME_OFFSET_PRESENT);
}
// add one sample
trun_entries.SetItemCount(sample_count+1);
AP4_TrunAtom::Entry& trun_entry = trun_entries[sample_count];
trun_entry.sample_duration = timescale?
(AP4_UI32)AP4_ConvertTime(cursor->m_Sample.GetDuration(),
cursor->m_Track->GetMediaTimeScale(),
timescale):
cursor->m_Sample.GetDuration();
trun_entry.sample_size = cursor->m_Sample.GetSize();
trun_entry.sample_composition_time_offset = timescale?
(AP4_UI32)AP4_ConvertTime(cursor->m_Sample.GetCtsDelta(),
cursor->m_Track->GetMediaTimeScale(),
timescale):
cursor->m_Sample.GetCtsDelta();
sample_indexes.SetItemCount(sample_count+1);
sample_indexes[sample_count] = cursor->m_SampleIndex;
mdat_size += trun_entry.sample_size;
// next sample
cursor->m_Timestamp += trun_entry.sample_duration;
cursor->m_SampleIndex++;
sample_count++;
if (cursor->m_SampleIndex >= cursor->m_Track->GetSampleCount()) {
cursor->m_Eos = true;
AP4_UI64 end_dts = cursor->m_Sample.GetDts()+cursor->m_Sample.GetDuration();
cursor->m_Sample.Reset();
cursor->m_Sample.SetDts(end_dts);
break;
}
result = cursor->m_Track->GetSample(cursor->m_SampleIndex, cursor->m_Sample);
if (AP4_FAILED(result)) {
cursor->m_Eos = true;
AP4_UI64 end_dts = cursor->m_Sample.GetDts()+cursor->m_Sample.GetDuration();
cursor->m_Sample.Reset();
cursor->m_Sample.SetDts(end_dts);
break;
}
if (cursor->m_Sample.IsSync()) {
if (cursor->m_Sample.GetDts() >= cursor->m_EndDts) {
break; // done with this segment
}
}
}
if (Options.verbosity) {
printf(" %d samples\n", sample_count);
}
// update moof and children
trun->SetEntries(trun_entries);
trun->SetDataOffset((AP4_UI32)moof->GetSize()+AP4_ATOM_HEADER_SIZE);
// write moof
moof->Write(output_stream);
// write mdat
output_stream.WriteUI32(mdat_size);
output_stream.WriteUI32(AP4_ATOM_TYPE_MDAT);
AP4_Sample sample;
AP4_DataBuffer sample_data;
for (unsigned int i=0; i<sample_indexes.ItemCount(); i++) {
result = cursor->m_Track->ReadSample(sample_indexes[i], sample, sample_data);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to read sample %d (%d)\n", sample_indexes[i], result);
return;
}
result = output_stream.Write(sample_data.GetData(), sample_data.GetDataSize());
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to write sample data (%d)\n", result);
return;
}
}
// cleanup
delete moof;
}
// create an mfra container and write out the index
AP4_ContainerAtom mfra(AP4_ATOM_TYPE_MFRA);
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
mfra.AddChild(cursors[i]->m_Tfra);
cursors[i]->m_Tfra = NULL;
}
AP4_MfroAtom* mfro = new AP4_MfroAtom((AP4_UI32)mfra.GetSize()+16);
mfra.AddChild(mfro);
result = mfra.Write(output_stream);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to write 'mfra' (%d)\n", result);
return;
}
// cleanup
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
delete cursors[i];
}
delete output_movie;
}
/*----------------------------------------------------------------------
| AP4_MarlinIpmpEncryptingProcessor::Initialize
+---------------------------------------------------------------------*/
AP4_Result
AP4_MarlinIpmpEncryptingProcessor::Initialize(
AP4_AtomParent& top_level,
AP4_ByteStream& /*stream*/,
AP4_Processor::ProgressListener* /*listener = NULL*/)
{
// get the moov atom
AP4_MoovAtom* moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, top_level.GetChild(AP4_ATOM_TYPE_MOOV));
if (moov == NULL) return AP4_ERROR_INVALID_FORMAT;
// deal with the file type
AP4_FtypAtom* ftyp = AP4_DYNAMIC_CAST(AP4_FtypAtom, top_level.GetChild(AP4_ATOM_TYPE_FTYP));
if (ftyp) {
// remove the atom, it will be replaced with a new one
top_level.RemoveChild(ftyp);
// keep the existing brand and compatible brands
AP4_Array<AP4_UI32> compatible_brands;
compatible_brands.EnsureCapacity(ftyp->GetCompatibleBrands().ItemCount()+1);
for (unsigned int i=0; i<ftyp->GetCompatibleBrands().ItemCount(); i++) {
compatible_brands.Append(ftyp->GetCompatibleBrands()[i]);
}
// add the MGSV compatible brand if it is not already there
if (!ftyp->HasCompatibleBrand(AP4_MARLIN_BRAND_MGSV)) {
compatible_brands.Append(AP4_MARLIN_BRAND_MGSV);
}
// create a replacement for the major brand
AP4_FtypAtom* new_ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV,
0x13c078c, //AP4_MARLIN_BRAND_MGSV_MAJOR_VERSION,
&compatible_brands[0],
compatible_brands.ItemCount());
delete ftyp;
ftyp = new_ftyp;
} else {
AP4_UI32 isom = AP4_FTYP_BRAND_ISOM;
ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV, 0, &isom, 1);
}
// insert the ftyp atom as the first child
top_level.AddChild(ftyp, 0);
// create and 'mpod' track reference atom
AP4_TrefTypeAtom* mpod = new AP4_TrefTypeAtom(AP4_ATOM_TYPE_MPOD);
// look for an available track ID, starting at 1
unsigned int od_track_id = 0;
unsigned int od_track_position = 0;
AP4_List<AP4_TrakAtom>::Item* trak_item = moov->GetTrakAtoms().FirstItem();
while (trak_item) {
AP4_TrakAtom* trak = trak_item->GetData();
if (trak) {
od_track_position++;
if (trak->GetId() >= od_track_id) {
od_track_id = trak->GetId()+1;
}
// if the track is encrypted, reference it in the mpod
if (m_KeyMap.GetKey(trak->GetId())) {
mpod->AddTrackId(trak->GetId());
}
//m_SinfEntries.Add(new SinfEntry(trak->GetId(), NULL));
}
trak_item = trak_item->GetNext();
}
// check that there was at least one track in the file
if (od_track_id == 0) return AP4_ERROR_INVALID_FORMAT;
// create an initial object descriptor
AP4_InitialObjectDescriptor* iod =
// FIXME: get real values from the property map
new AP4_InitialObjectDescriptor(AP4_DESCRIPTOR_TAG_MP4_IOD,
1022, // object descriptor id
false,
0xFE, // OD profile level (0xFE = No OD profile specified)
0xFF, // scene profile level
0xFE, // audio profile level
0xFE, // visual profile level
0xFF); // graphics profile
// create an ES_ID_Inc subdescriptor and add it to the initial object descriptor
AP4_EsIdIncDescriptor* es_id_inc = new AP4_EsIdIncDescriptor(od_track_id);
iod->AddSubDescriptor(es_id_inc);
// create an iods atom to hold the initial object descriptor
AP4_IodsAtom* iods = new AP4_IodsAtom(iod);
// add the iods atom to the moov atom (try to put it just after mvhd)
int iods_position = 0;
int item_position = 0;
for (AP4_List<AP4_Atom>::Item* item = moov->GetChildren().FirstItem();
item;
++item) {
++item_position;
if (item->GetData()->GetType() == AP4_ATOM_TYPE_MVHD) {
iods_position = item_position;
break;
}
}
AP4_Result result = moov->AddChild(iods, iods_position);
if (AP4_FAILED(result)) {
delete iods;
return result;
}
// create a sample table for the OD track
AP4_SyntheticSampleTable* od_sample_table = new AP4_SyntheticSampleTable();
// create the sample description for the OD track
AP4_MpegSystemSampleDescription* od_sample_description;
od_sample_description = new AP4_MpegSystemSampleDescription(AP4_STREAM_TYPE_OD,
AP4_OTI_MPEG4_SYSTEM,
NULL,
32768, // buffer size
1024, // max bitrate
512); // avg bitrate
od_sample_table->AddSampleDescription(od_sample_description, true);
// create the OD descriptor update
AP4_DescriptorUpdateCommand od_update(AP4_COMMAND_TAG_OBJECT_DESCRIPTOR_UPDATE);
for (unsigned int i=0; i<mpod->GetTrackIds().ItemCount(); i++) {
AP4_ObjectDescriptor* od = new AP4_ObjectDescriptor(AP4_DESCRIPTOR_TAG_MP4_OD, 256+i); // descriptor id = 256+i
od->AddSubDescriptor(new AP4_EsIdRefDescriptor(i+1)); // index into mpod (1-based)
od->AddSubDescriptor(new AP4_IpmpDescriptorPointer(i+1)); // descriptor id = i+1
od_update.AddDescriptor(od);
}
// create the IPMP descriptor update
AP4_DescriptorUpdateCommand ipmp_update(AP4_COMMAND_TAG_IPMP_DESCRIPTOR_UPDATE);
for (unsigned int i=0; i<mpod->GetTrackIds().ItemCount(); i++) {
// create the ipmp descriptor
AP4_IpmpDescriptor* ipmp_descriptor = new AP4_IpmpDescriptor(i+1, AP4_MARLIN_IPMPS_TYPE_MGSV);
// create the sinf container
AP4_ContainerAtom* sinf = new AP4_ContainerAtom(AP4_ATOM_TYPE_SINF);
// add the scheme type atom
sinf->AddChild(new AP4_SchmAtom(AP4_PROTECTION_SCHEME_TYPE_MARLIN_ACBC, 0x0100, NULL, true));
// setup the scheme info atom
const char* content_id = m_PropertyMap.GetProperty(mpod->GetTrackIds()[i], "ContentId");
if (content_id) {
AP4_ContainerAtom* schi = new AP4_ContainerAtom(AP4_ATOM_TYPE_SCHI);
schi->AddChild(new AP4_NullTerminatedStringAtom(AP4_ATOM_TYPE_8ID_, content_id));
sinf->AddChild(schi);
}
// serialize the sinf atom to a buffer and set it as the ipmp data
AP4_MemoryByteStream* sinf_data = new AP4_MemoryByteStream((AP4_Size)sinf->GetSize());
sinf->Write(*sinf_data);
ipmp_descriptor->SetData(sinf_data->GetData(), sinf_data->GetDataSize());
sinf_data->Release();
ipmp_update.AddDescriptor(ipmp_descriptor);
}
// add the sample with the descriptors and updates
AP4_MemoryByteStream* sample_data = new AP4_MemoryByteStream();
od_update.Write(*sample_data);
ipmp_update.Write(*sample_data);
od_sample_table->AddSample(*sample_data, 0, sample_data->GetDataSize(), 0, 0, 0, 0, true);
// create the OD track
AP4_TrakAtom* od_track = new AP4_TrakAtom(od_sample_table,
AP4_HANDLER_TYPE_ODSM,
"Bento4 Marlin OD Handler",
od_track_id,
0, 0,
1, 1000, 1, 0, "und",
0, 0);
// add an entry in the processor's stream table to indicate that the
// media data for the OD track is not in the file stream, but in our
// memory stream.
m_ExternalTrackData.Add(new ExternalTrackData(od_track_id, sample_data));
sample_data->Release();
// add a tref track reference atom
AP4_ContainerAtom* tref = new AP4_ContainerAtom(AP4_ATOM_TYPE_TREF);
tref->AddChild(mpod);
od_track->AddChild(tref, 1); // add after 'tkhd'
// add the track to the moov atoms (just after the last track)
moov->AddChild(od_track, od_track_position);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_OmaDcfAtomDecrypter::CreateDecryptingStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_OmaDcfAtomDecrypter::CreateDecryptingStream(
AP4_ContainerAtom& odrm,
const AP4_UI08* key,
AP4_Size key_size,
AP4_BlockCipherFactory* block_cipher_factory,
AP4_ByteStream*& stream)
{
// default return values
stream = NULL;
AP4_OdheAtom* odhe = AP4_DYNAMIC_CAST(AP4_OdheAtom, odrm.GetChild(AP4_ATOM_TYPE_ODHE));
if (odhe == NULL) return AP4_ERROR_INVALID_FORMAT;
AP4_OddaAtom* odda = AP4_DYNAMIC_CAST(AP4_OddaAtom, odrm.GetChild(AP4_ATOM_TYPE_ODDA));;
if (odda == NULL) return AP4_ERROR_INVALID_FORMAT;
AP4_OhdrAtom* ohdr = AP4_DYNAMIC_CAST(AP4_OhdrAtom, odhe->GetChild(AP4_ATOM_TYPE_OHDR));
if (ohdr == NULL) return AP4_ERROR_INVALID_FORMAT;
// default cipher factory
if (block_cipher_factory == NULL) {
block_cipher_factory = &AP4_DefaultBlockCipherFactory::Instance;
}
// shortcut for non-encrypted files
if (ohdr->GetEncryptionMethod() == AP4_OMA_DCF_ENCRYPTION_METHOD_NULL) {
stream = &odda->GetEncryptedPayload();
stream->AddReference();
return AP4_SUCCESS;
}
// if this is part of a group, use the group key to obtain the content
// key (note that the field called GroupKey in the spec is actually not
// the group key but the content key encrypted with the group key...
AP4_GrpiAtom* grpi = AP4_DYNAMIC_CAST(AP4_GrpiAtom, ohdr->GetChild(AP4_ATOM_TYPE_GRPI));
AP4_UI08* key_buffer = NULL;
if (grpi) {
// sanity check on the encrypted key size
if (grpi->GetGroupKey().GetDataSize() < 32) {
return AP4_ERROR_INVALID_FORMAT;
}
// create a block cipher to decrypt the content key
AP4_BlockCipher* block_cipher = NULL;
AP4_Result result;
// create a stream cipher from the block cipher
AP4_StreamCipher* stream_cipher = NULL;
switch (ohdr->GetEncryptionMethod()) {
case AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CBC:
result = block_cipher_factory->CreateCipher(AP4_BlockCipher::AES_128,
AP4_BlockCipher::DECRYPT,
AP4_BlockCipher::CBC,
NULL,
key,
key_size,
block_cipher);
if (AP4_FAILED(result)) return result;
stream_cipher = new AP4_CbcStreamCipher(block_cipher);
break;
case AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CTR: {
AP4_BlockCipher::CtrParams ctr_params;
ctr_params.counter_size = 16;
result = block_cipher_factory->CreateCipher(AP4_BlockCipher::AES_128,
AP4_BlockCipher::DECRYPT,
AP4_BlockCipher::CTR,
&ctr_params,
key,
key_size,
block_cipher);
if (AP4_FAILED(result)) return result;
stream_cipher = new AP4_CtrStreamCipher(block_cipher, 16);
break;
}
default:
return AP4_ERROR_NOT_SUPPORTED;
}
// set the IV
stream_cipher->SetIV(grpi->GetGroupKey().GetData());
// decrypt the content key
AP4_Size key_buffer_size = grpi->GetGroupKey().GetDataSize(); // worst case
key_buffer = new AP4_UI08[key_buffer_size];
result = stream_cipher->ProcessBuffer(grpi->GetGroupKey().GetData()+16,
grpi->GetGroupKey().GetDataSize()-16,
key_buffer,
&key_buffer_size,
true);
delete stream_cipher; // this will also delete the block cipher
if (AP4_FAILED(result)) {
delete[] key_buffer;
return result;
}
// point to the new key value
key = key_buffer;
key_size = key_buffer_size;
}
AP4_OmaDcfCipherMode mode;
switch (ohdr->GetEncryptionMethod()) {
case AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CBC:
mode = AP4_OMA_DCF_CIPHER_MODE_CBC;
break;
case AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CTR:
mode = AP4_OMA_DCF_CIPHER_MODE_CTR;
break;
default:
return AP4_ERROR_NOT_SUPPORTED;
}
AP4_Result result;
result = CreateDecryptingStream(mode,
odda->GetEncryptedPayload(),
ohdr->GetPlaintextLength(),
key, key_size,
block_cipher_factory,
stream);
// cleanup
delete[] key_buffer;
return result;
}
/*----------------------------------------------------------------------
| DcfParser_ParseV2Header
+---------------------------------------------------------------------*/
static BLT_Result
DcfParser_ParseV2Header(DcfParser* self, ATX_InputStream* stream)
{
/* rewind the byte stream */
ATX_InputStream_Seek(stream, 0);
/* parse the atoms from the stream */
AP4_ByteStream* mp4_stream = new ATX_InputStream_To_AP4_ByteStream_Adapter(stream);
AP4_AtomParent atoms;
AP4_Result result = AP4_DefaultAtomFactory::Instance.CreateAtomsFromStream(*mp4_stream, atoms);
mp4_stream->Release();
AP4_ByteStream* decrypting_stream = NULL;
AP4_ContainerAtom* odrm = dynamic_cast<AP4_ContainerAtom*>(atoms.GetChild(AP4_ATOM_TYPE_ODRM));
if (odrm) {
AP4_OdheAtom* odhe = dynamic_cast<AP4_OdheAtom*>(odrm->GetChild(AP4_ATOM_TYPE_ODHE));
AP4_OddaAtom* odda = dynamic_cast<AP4_OddaAtom*>(odrm->GetChild(AP4_ATOM_TYPE_ODDA));
if (odhe && odda) {
const char* content_id = "";
/* get the content ID */
AP4_OhdrAtom* ohdr = dynamic_cast<AP4_OhdrAtom*>(odhe->GetChild(AP4_ATOM_TYPE_OHDR));
if (ohdr) {
content_id = ohdr->GetContentId().GetChars();
}
/* get the content key */
NPT_DataBuffer key;
result = DcfParser_GetContentKey(self, content_id, key);
if (BLT_FAILED(result)) {
ATX_LOG_FINE_2("GetKeyForContent(%s) returned %d",
content_id,
result);
return BLT_ERROR_NO_MEDIA_KEY;
}
/* create the decrypting stream */
result = AP4_OmaDcfAtomDecrypter::CreateDecryptingStream(*odrm,
key.GetData(),
key.GetDataSize(),
self->cipher_factory,
decrypting_stream);
if (AP4_SUCCEEDED(result)) {
/* update the content type */
ATX_CopyStringN(self->input.content_type,
odhe->GetContentType().GetChars(),
sizeof(self->input.content_type));
/* update the encrypted size */
self->input.encrypted_size = odda->GetEncryptedDataLength();
}
}
}
/* check that we have found what we needed in the atoms */
if (decrypting_stream == NULL) return BLT_ERROR_INVALID_MEDIA_FORMAT;
/* update the output size */
AP4_LargeSize plaintext_size = 0;
if (AP4_SUCCEEDED(decrypting_stream->GetSize(plaintext_size))) {
self->output.size = plaintext_size;
} else {
self->output.size = self->input.encrypted_size;
}
/* create a reverse adapter */
result = AP4_ByteStream_To_ATX_InputStream_Adapter_Create(decrypting_stream, &self->output.stream);
decrypting_stream->Release();
return BLT_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_MarlinIpmpParser:Parse
+---------------------------------------------------------------------*/
AP4_Result
AP4_MarlinIpmpParser::Parse(AP4_AtomParent& top_level,
AP4_ByteStream& stream,
AP4_List<SinfEntry>& sinf_entries,
bool remove_od_data)
{
// check the file type
AP4_FtypAtom* ftyp = AP4_DYNAMIC_CAST(AP4_FtypAtom, top_level.GetChild(AP4_ATOM_TYPE_FTYP));
if (ftyp == NULL ||
(ftyp->GetMajorBrand() != AP4_MARLIN_BRAND_MGSV && !ftyp->HasCompatibleBrand(AP4_MARLIN_BRAND_MGSV))) {
return AP4_ERROR_INVALID_FORMAT;
}
// check the initial object descriptor and get the OD Track ID
AP4_IodsAtom* iods = AP4_DYNAMIC_CAST(AP4_IodsAtom, top_level.FindChild("moov/iods"));
AP4_UI32 od_track_id = 0;
if (iods == NULL) return AP4_ERROR_INVALID_FORMAT;
const AP4_ObjectDescriptor* od = iods->GetObjectDescriptor();
if (od == NULL) return AP4_ERROR_INVALID_FORMAT;
AP4_EsIdIncDescriptor* es_id_inc = AP4_DYNAMIC_CAST(AP4_EsIdIncDescriptor, od->FindSubDescriptor(AP4_DESCRIPTOR_TAG_ES_ID_INC));
if (es_id_inc == NULL) return AP4_ERROR_INVALID_FORMAT;
od_track_id = es_id_inc->GetTrackId();
// find the track pointed to by the descriptor
AP4_MoovAtom* moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, top_level.GetChild(AP4_ATOM_TYPE_MOOV));
if (moov == NULL) return AP4_ERROR_INVALID_FORMAT;
AP4_TrakAtom* od_trak = NULL;
AP4_List<AP4_TrakAtom>::Item* trak_item = moov->GetTrakAtoms().FirstItem();
while (trak_item) {
AP4_TrakAtom* trak = trak_item->GetData();
if (trak) {
if (trak->GetId() == od_track_id) {
od_trak = trak;
} else {
sinf_entries.Add(new SinfEntry(trak->GetId(), NULL));
}
}
trak_item = trak_item->GetNext();
}
// check that we have found the OD track
if (od_trak == NULL) return AP4_ERROR_INVALID_FORMAT;
// look for the 'mpod' trak references
AP4_TrefTypeAtom* track_references;
track_references = AP4_DYNAMIC_CAST(AP4_TrefTypeAtom, od_trak->FindChild("tref/mpod"));
if (track_references == NULL) return AP4_ERROR_INVALID_FORMAT;
// create an AP4_Track object from the trak atom and check that it has samples
AP4_Track* od_track = new AP4_Track(*od_trak, stream, 0);
if (od_track->GetSampleCount() < 1) {
delete od_track;
return AP4_ERROR_INVALID_FORMAT;
}
// get the first sample (in this version, we only look at a single OD command)
AP4_Sample od_sample;
AP4_Result result = od_track->GetSample(0, od_sample);
if (AP4_FAILED(result)) {
delete od_track;
return AP4_ERROR_INVALID_FORMAT;
}
// adapt the sample data into a byte stream for parsing
AP4_DataBuffer sample_data;
od_sample.ReadData(sample_data);
AP4_MemoryByteStream* sample_stream = new AP4_MemoryByteStream(sample_data);
// look for one ObjectDescriptorUpdate command and
// one IPMP_DescriptorUpdate command
AP4_DescriptorUpdateCommand* od_update = NULL;
AP4_DescriptorUpdateCommand* ipmp_update = NULL;
do {
AP4_Command* command = NULL;
result = AP4_CommandFactory::CreateCommandFromStream(*sample_stream, command);
if (AP4_SUCCEEDED(result)) {
// found a command in the sample, check the type
switch (command->GetTag()) {
case AP4_COMMAND_TAG_OBJECT_DESCRIPTOR_UPDATE:
if (od_update == NULL) {
od_update = AP4_DYNAMIC_CAST(AP4_DescriptorUpdateCommand, command);
}
break;
case AP4_COMMAND_TAG_IPMP_DESCRIPTOR_UPDATE:
if (ipmp_update == NULL) {
ipmp_update = AP4_DYNAMIC_CAST(AP4_DescriptorUpdateCommand, command);
}
break;
default:
break;
}
}
} while (AP4_SUCCEEDED(result));
sample_stream->Release();
sample_stream = NULL;
// check that we have what we need
if (od_update == NULL || ipmp_update == NULL) {
delete od_track;
return AP4_ERROR_INVALID_FORMAT;
}
// process all the object descriptors in the od update
for (AP4_List<AP4_Descriptor>::Item* od_item = od_update->GetDescriptors().FirstItem();
od_item;
od_item = od_item->GetNext()) {
od = AP4_DYNAMIC_CAST(AP4_ObjectDescriptor, od_item->GetData());
if (od == NULL) continue;
// find which track this od references
AP4_EsIdRefDescriptor* es_id_ref;
es_id_ref = AP4_DYNAMIC_CAST(AP4_EsIdRefDescriptor, od->FindSubDescriptor(AP4_DESCRIPTOR_TAG_ES_ID_REF));
if (es_id_ref == NULL ||
es_id_ref->GetRefIndex() > track_references->GetTrackIds().ItemCount() ||
es_id_ref->GetRefIndex() == 0) {
continue;
}
AP4_UI32 track_id = track_references->GetTrackIds()[es_id_ref->GetRefIndex()-1];
SinfEntry* sinf_entry = NULL;
for (AP4_List<SinfEntry>::Item* sinf_entry_item = sinf_entries.FirstItem();
sinf_entry_item;
sinf_entry_item = sinf_entry_item->GetNext()) {
sinf_entry = sinf_entry_item->GetData();
if (sinf_entry->m_TrackId == track_id) {
break; // match
} else {
sinf_entry = NULL; // no match
}
}
if (sinf_entry == NULL) continue; // no matching entry
if (sinf_entry->m_Sinf != NULL) continue; // entry already populated
// see what ipmp descriptor this od points to
AP4_IpmpDescriptorPointer* ipmpd_pointer;
ipmpd_pointer = AP4_DYNAMIC_CAST(AP4_IpmpDescriptorPointer, od->FindSubDescriptor(AP4_DESCRIPTOR_TAG_IPMP_DESCRIPTOR_POINTER));
if (ipmpd_pointer == NULL) continue; // no pointer
// find the ipmp descriptor referenced by the pointer
AP4_IpmpDescriptor* ipmpd = NULL;
for (AP4_List<AP4_Descriptor>::Item* ipmpd_item = ipmp_update->GetDescriptors().FirstItem();
ipmpd_item;
ipmpd_item = ipmpd_item->GetNext()) {
// check that this descriptor is of the right type
ipmpd = AP4_DYNAMIC_CAST(AP4_IpmpDescriptor, ipmpd_item->GetData());
if (ipmpd == NULL || ipmpd->GetIpmpsType() != AP4_MARLIN_IPMPS_TYPE_MGSV) continue;
// check the descriptor id
if (ipmpd->GetDescriptorId() == ipmpd_pointer->GetDescriptorId()) {
break; // match
} else {
ipmpd = NULL; // no match
}
}
if (ipmpd == NULL) continue; // no matching entry
// parse the ipmp data into one or more 'sinf' atoms, and keep the one with the
// right type
AP4_MemoryByteStream* data = new AP4_MemoryByteStream(ipmpd->GetData().GetData(),
ipmpd->GetData().GetDataSize());
AP4_LargeSize bytes_available = ipmpd->GetData().GetDataSize();
do {
AP4_Atom* atom = NULL;
// setup the factory with a context so we can instantiate an 'schm'
// atom with a slightly different format than the standard 'schm'
AP4_AtomFactory* factory = &AP4_MarlinIpmpAtomFactory::Instance;
factory->PushContext(AP4_ATOM_TYPE('m','r','l','n'));
// parse the next atom in the stream
result = factory->CreateAtomFromStream(*data, bytes_available, atom);
factory->PopContext();
if (AP4_FAILED(result) || atom == NULL) break;
// check that what we have parsed is indeed an 'sinf' of the right type
if (atom->GetType() == AP4_ATOM_TYPE_SINF) {
AP4_ContainerAtom* sinf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
AP4_SchmAtom* schm = AP4_DYNAMIC_CAST(AP4_SchmAtom, sinf->FindChild("schm"));
if (schm->GetSchemeType() == AP4_PROTECTION_SCHEME_TYPE_MARLIN_ACBC &&
schm->GetSchemeVersion() == 0x0100) {
// store the sinf in the entry for that track
sinf_entry->m_Sinf = sinf;
break;
}
}
delete atom;
} while (AP4_SUCCEEDED(result));
data->Release();
}
// remove the iods atom and the OD track if required
if (remove_od_data) {
od_trak->Detach();
delete od_trak;
iods->Detach();
delete iods;
}
// cleanup
delete od_track;
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_Processor::ProcessFragments
+---------------------------------------------------------------------*/
AP4_Result
AP4_Processor::ProcessFragments(AP4_MoovAtom* moov,
AP4_List<AP4_MoofLocator>& moofs,
AP4_ContainerAtom* mfra,
AP4_ByteStream& input,
AP4_ByteStream& output)
{
// FIXME: this only works for non-changing moofs
for (AP4_List<AP4_MoofLocator>::Item* item = moofs.FirstItem();
item;
item = item->GetNext()) {
AP4_MoofLocator* locator = item->GetData();
AP4_ContainerAtom* moof = locator->m_Moof;
AP4_UI64 moof_offset = locator->m_Offset;
AP4_UI64 mdat_payload_offset = moof_offset+moof->GetSize()+8;
AP4_MovieFragment* fragment = new AP4_MovieFragment(moof);
AP4_Sample sample;
AP4_DataBuffer sample_data_in;
AP4_DataBuffer sample_data_out;
AP4_Result result;
// process all the traf atoms
AP4_Array<AP4_Processor::FragmentHandler*> handlers;
for (;AP4_Atom* atom = moof->GetChild(AP4_ATOM_TYPE_TRAF, handlers.ItemCount());) {
AP4_ContainerAtom* traf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
AP4_Processor::FragmentHandler* handler = CreateFragmentHandler(traf);
if (handler) result = handler->ProcessFragment();
handlers.Append(handler);
}
// write the moof
AP4_UI64 moof_out_start = 0;
output.Tell(moof_out_start);
bool moof_has_changed = false;
moof->Write(output);
// process all track runs
for (unsigned int i=0; i<handlers.ItemCount(); i++) {
AP4_FragmentSampleTable* sample_table = NULL;
AP4_Processor::FragmentHandler* handler = handlers[i];
// get the track ID
AP4_ContainerAtom* traf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, moof->GetChild(AP4_ATOM_TYPE_TRAF, i));
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, traf->GetChild(AP4_ATOM_TYPE_TFHD, i));
// create a sample table object so we can read the sample data
result = fragment->CreateSampleTable(moov, tfhd->GetTrackId(), &input, moof_offset, mdat_payload_offset, sample_table);
if (AP4_FAILED(result)) return result;
// compute the mdat size
AP4_UI64 mdat_size = 0;
for (unsigned int j=0; j<sample_table->GetSampleCount(); j++) {
result = sample_table->GetSample(j, sample);
if (AP4_FAILED(result)) return result;
mdat_size += sample.GetSize();
}
// write an mdat header
if (mdat_size > 0xFFFFFFFF-8) {
// we don't support large mdat fragments
return AP4_ERROR_OUT_OF_RANGE;
}
if (mdat_size) {
output.WriteUI32((AP4_UI32)(8+mdat_size));
output.WriteUI32(AP4_ATOM_TYPE_MDAT);
}
#if defined(AP4_DEBUG)
AP4_Position before;
output.Tell(before);
#endif
// write the mdat
for (unsigned int j=0; j<sample_table->GetSampleCount(); j++) {
result = sample_table->GetSample(j, sample);
if (AP4_FAILED(result)) return result;
sample.ReadData(sample_data_in);
// process the sample data
if (handler) {
result = handler->ProcessSample(sample_data_in, sample_data_out);
if (AP4_FAILED(result)) return result;
// write the sample data
result = output.Write(sample_data_out.GetData(), sample_data_out.GetDataSize());
if (AP4_FAILED(result)) return result;
// give the handler a chance to update the atoms
result = handler->FinishFragment();
if (AP4_SUCCEEDED(result)) moof_has_changed = true;
} else {
// write the sample data (unmodified)
result = output.Write(sample_data_in.GetData(), sample_data_in.GetDataSize());
if (AP4_FAILED(result)) return result;
}
}
#if defined(AP4_DEBUG)
AP4_Position after;
output.Tell(after);
AP4_ASSERT(after-before == mdat_size);
#endif
delete sample_table;
}
// update the moof if needed
AP4_UI64 mdat_out_end = 0;
output.Tell(mdat_out_end);
if (moof_has_changed) {
output.Seek(moof_out_start);
moof->Write(output);
output.Seek(mdat_out_end);
}
// update the mfra if we have one
if (mfra) {
for (AP4_List<AP4_Atom>::Item* mfra_item = mfra->GetChildren().FirstItem();
mfra_item;
mfra_item = mfra_item->GetNext()) {
if (mfra_item->GetData()->GetType() != AP4_ATOM_TYPE_TFRA) continue;
AP4_TfraAtom* tfra = AP4_DYNAMIC_CAST(AP4_TfraAtom, mfra_item->GetData());
if (tfra == NULL) continue;
AP4_Array<AP4_TfraAtom::Entry>& entries = tfra->GetEntries();
AP4_Cardinal entry_count = entries.ItemCount();
for (unsigned int i=0; i<entry_count; i++) {
if (entries[i].m_MoofOffset == locator->m_Offset) {
entries[i].m_MoofOffset = moof_out_start;
}
}
}
}
delete fragment;
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_MarlinIpmpEncryptingProcessor::Initialize
+---------------------------------------------------------------------*/
AP4_Result
AP4_MarlinIpmpEncryptingProcessor::Initialize(
AP4_AtomParent& top_level,
AP4_ByteStream& /*stream*/,
AP4_Processor::ProgressListener* /*listener = NULL*/)
{
// get the moov atom
AP4_MoovAtom* moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, top_level.GetChild(AP4_ATOM_TYPE_MOOV));
if (moov == NULL) return AP4_ERROR_INVALID_FORMAT;
// deal with the file type
AP4_FtypAtom* ftyp = AP4_DYNAMIC_CAST(AP4_FtypAtom, top_level.GetChild(AP4_ATOM_TYPE_FTYP));
if (ftyp) {
// remove the atom, it will be replaced with a new one
top_level.RemoveChild(ftyp);
// keep the existing brand and compatible brands
AP4_Array<AP4_UI32> compatible_brands;
compatible_brands.EnsureCapacity(ftyp->GetCompatibleBrands().ItemCount()+1);
for (unsigned int i=0; i<ftyp->GetCompatibleBrands().ItemCount(); i++) {
compatible_brands.Append(ftyp->GetCompatibleBrands()[i]);
}
// add the MGSV compatible brand if it is not already there
if (!ftyp->HasCompatibleBrand(AP4_MARLIN_BRAND_MGSV)) {
compatible_brands.Append(AP4_MARLIN_BRAND_MGSV);
}
// create a replacement for the major brand
AP4_FtypAtom* new_ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV,
0x13c078c, //AP4_MARLIN_BRAND_MGSV_MAJOR_VERSION,
&compatible_brands[0],
compatible_brands.ItemCount());
delete ftyp;
ftyp = new_ftyp;
} else {
AP4_UI32 isom = AP4_FTYP_BRAND_ISOM;
ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV, 0, &isom, 1);
}
// insert the ftyp atom as the first child
top_level.AddChild(ftyp, 0);
// create and 'mpod' track reference atom
AP4_TrefTypeAtom* mpod = new AP4_TrefTypeAtom(AP4_ATOM_TYPE_MPOD);
// look for an available track ID, starting at 1
unsigned int od_track_id = 0;
unsigned int od_track_position = 0;
for (AP4_List<AP4_TrakAtom>::Item* trak_item = moov->GetTrakAtoms().FirstItem();
trak_item;
trak_item = trak_item->GetNext()) {
AP4_TrakAtom* trak = trak_item->GetData();
if (trak) {
od_track_position++;
if (trak->GetId() >= od_track_id) {
od_track_id = trak->GetId()+1;
}
// if the track is encrypted, reference it in the mpod
if (m_KeyMap.GetKey(trak->GetId())) {
mpod->AddTrackId(trak->GetId());
}
//m_SinfEntries.Add(new SinfEntry(trak->GetId(), NULL));
}
}
// check that there was at least one track in the file
if (od_track_id == 0) return AP4_ERROR_INVALID_FORMAT;
// create an initial object descriptor
AP4_InitialObjectDescriptor* iod =
// FIXME: get real values from the property map
new AP4_InitialObjectDescriptor(AP4_DESCRIPTOR_TAG_MP4_IOD,
1022, // object descriptor id
false,
0xFE, // OD profile level (0xFE = No OD profile specified)
0xFF, // scene profile level
0xFE, // audio profile level
0xFE, // visual profile level
0xFF); // graphics profile
// create an ES_ID_Inc subdescriptor and add it to the initial object descriptor
AP4_EsIdIncDescriptor* es_id_inc = new AP4_EsIdIncDescriptor(od_track_id);
iod->AddSubDescriptor(es_id_inc);
// create an iods atom to hold the initial object descriptor
AP4_IodsAtom* iods = new AP4_IodsAtom(iod);
// add the iods atom to the moov atom (try to put it just after mvhd)
int iods_position = 0;
int item_position = 0;
for (AP4_List<AP4_Atom>::Item* moov_item = moov->GetChildren().FirstItem();
moov_item;
moov_item = moov_item->GetNext()) {
++item_position;
if (moov_item->GetData()->GetType() == AP4_ATOM_TYPE_MVHD) {
iods_position = item_position;
break;
}
}
AP4_Result result = moov->AddChild(iods, iods_position);
if (AP4_FAILED(result)) {
delete iods;
return result;
}
// create a sample table for the OD track
AP4_SyntheticSampleTable* od_sample_table = new AP4_SyntheticSampleTable();
// create the sample description for the OD track
AP4_MpegSystemSampleDescription* od_sample_description;
od_sample_description = new AP4_MpegSystemSampleDescription(AP4_STREAM_TYPE_OD,
AP4_OTI_MPEG4_SYSTEM,
NULL,
32768, // buffer size
1024, // max bitrate
512); // avg bitrate
od_sample_table->AddSampleDescription(od_sample_description, true);
// create the OD descriptor update
AP4_DescriptorUpdateCommand od_update(AP4_COMMAND_TAG_OBJECT_DESCRIPTOR_UPDATE);
for (unsigned int i=0; i<mpod->GetTrackIds().ItemCount(); i++) {
AP4_ObjectDescriptor* od = new AP4_ObjectDescriptor(AP4_DESCRIPTOR_TAG_MP4_OD, 256+i); // descriptor id = 256+i
od->AddSubDescriptor(new AP4_EsIdRefDescriptor(i+1)); // index into mpod (1-based)
od->AddSubDescriptor(new AP4_IpmpDescriptorPointer(i+1)); // descriptor id = i+1
od_update.AddDescriptor(od);
}
// create the IPMP descriptor update
AP4_DescriptorUpdateCommand ipmp_update(AP4_COMMAND_TAG_IPMP_DESCRIPTOR_UPDATE);
for (unsigned int i=0; i<mpod->GetTrackIds().ItemCount(); i++) {
// create the ipmp descriptor
AP4_IpmpDescriptor* ipmp_descriptor = new AP4_IpmpDescriptor(i+1, AP4_MARLIN_IPMPS_TYPE_MGSV);
// create the sinf container
AP4_ContainerAtom* sinf = new AP4_ContainerAtom(AP4_ATOM_TYPE_SINF);
// add the scheme type atom
sinf->AddChild(new AP4_SchmAtom(m_UseGroupKey?
AP4_PROTECTION_SCHEME_TYPE_MARLIN_ACGK:
AP4_PROTECTION_SCHEME_TYPE_MARLIN_ACBC,
0x0100, NULL, true));
// create the 'schi' container
AP4_ContainerAtom* schi = new AP4_ContainerAtom(AP4_ATOM_TYPE_SCHI);
// add the content ID
const char* content_id = m_PropertyMap.GetProperty(mpod->GetTrackIds()[i], "ContentId");
if (content_id) {
// add the content ID (8id_)
schi->AddChild(new AP4_NullTerminatedStringAtom(AP4_ATOM_TYPE_8ID_, content_id));
}
// find what the track type is (necessary for the next step) and the key
const AP4_DataBuffer* key = NULL;
AP4_Track::Type track_type = AP4_Track::TYPE_UNKNOWN;
for (AP4_List<AP4_TrakAtom>::Item* trak_item = moov->GetTrakAtoms().FirstItem();
trak_item;
trak_item = trak_item->GetNext()) {
AP4_TrakAtom* trak = trak_item->GetData();
if (trak->GetId() == mpod->GetTrackIds()[i]) {
// find the handler type
AP4_Atom* sub = trak->FindChild("mdia/hdlr");
if (sub) {
AP4_HdlrAtom* hdlr = AP4_DYNAMIC_CAST(AP4_HdlrAtom, sub);
if (hdlr) {
AP4_UI32 type = hdlr->GetHandlerType();
if (type == AP4_HANDLER_TYPE_SOUN) {
track_type = AP4_Track::TYPE_AUDIO;
} else if (type == AP4_HANDLER_TYPE_VIDE) {
track_type = AP4_Track::TYPE_VIDEO;
}
}
}
// find the key
key = m_KeyMap.GetKey(trak->GetId());
break;
}
}
// group key
if (m_UseGroupKey && key) {
// find the group key
const AP4_DataBuffer* group_key = m_KeyMap.GetKey(0);
if (group_key) {
AP4_DataBuffer wrapped_key;
result = AP4_AesKeyWrap(group_key->GetData(), key->GetData(), key->GetDataSize(), wrapped_key);
if (AP4_FAILED(result)) return result;
AP4_UnknownAtom* gkey = new AP4_UnknownAtom(AP4_ATOM_TYPE_GKEY,
wrapped_key.GetData(),
wrapped_key.GetDataSize());
schi->AddChild(gkey);
}
}
// create and add the security attributes (satr)
if (track_type != AP4_Track::TYPE_UNKNOWN && key != NULL && key != NULL) {
AP4_ContainerAtom* satr = new AP4_ContainerAtom(AP4_ATOM_TYPE_SATR);
switch (track_type) {
case AP4_Track::TYPE_AUDIO:
satr->AddChild(new AP4_NullTerminatedStringAtom(AP4_ATOM_TYPE_STYP, AP4_MARLIN_IPMP_STYP_AUDIO));
break;
case AP4_Track::TYPE_VIDEO:
satr->AddChild(new AP4_NullTerminatedStringAtom(AP4_ATOM_TYPE_STYP, AP4_MARLIN_IPMP_STYP_VIDEO));
break;
default:
break;
}
// add the signed attributes, if any
const char* signed_attributes = m_PropertyMap.GetProperty(mpod->GetTrackIds()[i], "SignedAttributes");
if (signed_attributes) {
// decode the hex-encoded data
unsigned int size = (unsigned int)AP4_StringLength(signed_attributes)/2;
AP4_DataBuffer attributes_atoms;
attributes_atoms.SetDataSize(size);
if (AP4_SUCCEEDED(AP4_ParseHex(signed_attributes, attributes_atoms.UseData(), size))) {
// parse all the atoms encoded in the data and add them to the 'schi' container
AP4_MemoryByteStream* mbs = new AP4_MemoryByteStream(attributes_atoms.GetData(),
attributes_atoms.GetDataSize());
do {
AP4_Atom* atom = NULL;
result = AP4_DefaultAtomFactory::Instance.CreateAtomFromStream(*mbs, atom);
if (AP4_SUCCEEDED(result) && atom) {
satr->AddChild(atom);
}
} while (AP4_SUCCEEDED(result));
mbs->Release();
}
}
// compute the hmac
AP4_MemoryByteStream* mbs = new AP4_MemoryByteStream();
satr->Write(*mbs);
AP4_Hmac* digester = NULL;
AP4_Hmac::Create(AP4_Hmac::SHA256, key->GetData(), key->GetDataSize(), digester);
digester->Update(mbs->GetData(), mbs->GetDataSize());
AP4_DataBuffer hmac_value;
digester->Final(hmac_value);
AP4_Atom* hmac = new AP4_UnknownAtom(AP4_ATOM_TYPE_HMAC, hmac_value.GetData(), hmac_value.GetDataSize());
schi->AddChild(satr);
schi->AddChild(hmac);
mbs->Release();
}
sinf->AddChild(schi);
// serialize the sinf atom to a buffer and set it as the ipmp data
AP4_MemoryByteStream* sinf_data = new AP4_MemoryByteStream((AP4_Size)sinf->GetSize());
sinf->Write(*sinf_data);
ipmp_descriptor->SetData(sinf_data->GetData(), sinf_data->GetDataSize());
sinf_data->Release();
ipmp_update.AddDescriptor(ipmp_descriptor);
}
// add the sample with the descriptors and updates
AP4_MemoryByteStream* sample_data = new AP4_MemoryByteStream();
od_update.Write(*sample_data);
ipmp_update.Write(*sample_data);
od_sample_table->AddSample(*sample_data, 0, sample_data->GetDataSize(), 0, 0, 0, 0, true);
// create the OD track
AP4_TrakAtom* od_track = new AP4_TrakAtom(od_sample_table,
AP4_HANDLER_TYPE_ODSM,
"Bento4 Marlin OD Handler",
od_track_id,
0, 0,
1, 1000, 1, 0, "und",
0, 0);
// add an entry in the processor's stream table to indicate that the
// media data for the OD track is not in the file stream, but in our
// memory stream.
m_ExternalTrackData.Add(new ExternalTrackData(od_track_id, sample_data));
sample_data->Release();
// add a tref track reference atom
AP4_ContainerAtom* tref = new AP4_ContainerAtom(AP4_ATOM_TYPE_TREF);
tref->AddChild(mpod);
od_track->AddChild(tref, 1); // add after 'tkhd'
// add the track to the moov atoms (just after the last track)
moov->AddChild(od_track, od_track_position);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_Movie::ProcessMoof
+---------------------------------------------------------------------*/
void
AP4_Movie::ProcessMoof(AP4_ContainerAtom* moof, AP4_ByteStream& stream)
{
if (moof) {
AP4_Offset offset = 0;
stream.Tell(offset);
AP4_Offset moof_offset = offset - moof->GetSize();
AP4_Offset mdat_payload_offset = offset + 8;
AP4_MfhdAtom* mfhd = AP4_DYNAMIC_CAST(AP4_MfhdAtom, moof->GetChild(AP4_ATOM_TYPE_MFHD));
if (mfhd) {
for (AP4_List<AP4_Atom>::Item* item = moof->GetChildren().FirstItem();
item;
item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() == AP4_ATOM_TYPE_TRAF) {
AP4_ContainerAtom* traf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
if (traf) {
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, traf->GetChild(AP4_ATOM_TYPE_TFHD));
if (!tfhd) {
continue;
}
AP4_Track* track = GetTrack(tfhd->GetTrackId());
if (!track) {
continue;
}
AP4_TfdtAtom* tfdt = AP4_DYNAMIC_CAST(AP4_TfdtAtom, traf->GetChild(AP4_ATOM_TYPE_TFDT));
AP4_TrexAtom* trex = NULL;
AP4_ContainerAtom* mvex = AP4_DYNAMIC_CAST(AP4_ContainerAtom, m_MoovAtom->GetChild(AP4_ATOM_TYPE_MVEX));
if (mvex) {
for (AP4_List<AP4_Atom>::Item* child_item = mvex->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TREX) {
trex = AP4_DYNAMIC_CAST(AP4_TrexAtom, child_atom);
if (trex && trex->GetTrackId() == tfhd->GetTrackId()) break;
trex = NULL;
}
}
}
AP4_FragmentSampleTable* sampleTable = track->GetFragmentSampleTable();
AP4_Cardinal sample_count = 0;
for (AP4_List<AP4_Atom>::Item* child_item = traf->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, child_atom);
if (trun) {
sample_count += trun->GetEntries().ItemCount();
}
}
}
if (!sample_count) {
return;
}
if (sampleTable->GetSampleCount() == 0) {
track->CreateFragmentFromStdSamples();
}
if (AP4_FAILED(sampleTable->EnsureCapacity(sample_count + sampleTable->GetSampleCount()))) {
return;
}
AP4_UI64 dts_origin = tfdt ? tfdt->GetBaseMediaDecodeTime() : 0;
for (AP4_List<AP4_Atom>::Item* child_item = traf->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, child_atom);
if (trun) {
sampleTable->AddTrun(trun, tfhd, trex, stream, dts_origin, moof_offset, mdat_payload_offset);
}
}
}
}
}
}
}
}
}
/*----------------------------------------------------------------------
| Fragment
+---------------------------------------------------------------------*/
static void
Fragment(AP4_File& input_file,
AP4_ByteStream& output_stream,
AP4_Array<TrackCursor*>& cursors,
unsigned int fragment_duration,
AP4_UI32 timescale,
AP4_UI32 track_id,
bool create_segment_index)
{
AP4_List<FragmentInfo> fragments;
TrackCursor* index_cursor = NULL;
AP4_Result result;
AP4_Movie* input_movie = input_file.GetMovie();
if (input_movie == NULL) {
fprintf(stderr, "ERROR: no moov found in the input file\n");
return;
}
// create the output file object
AP4_Movie* output_movie = new AP4_Movie(1000);
// create an mvex container
AP4_ContainerAtom* mvex = new AP4_ContainerAtom(AP4_ATOM_TYPE_MVEX);
AP4_MehdAtom* mehd = new AP4_MehdAtom(0);
mvex->AddChild(mehd);
// add an output track for each track in the input file
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
AP4_Track* track = cursors[i]->m_Track;
// skip non matching tracks if we have a selector
if (track_id && track->GetId() != track_id) {
continue;
}
result = cursors[i]->Init();
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to init sample cursor (%d), skipping track %d\n", result, track->GetId());
return;
}
// create a sample table (with no samples) to hold the sample description
AP4_SyntheticSampleTable* sample_table = new AP4_SyntheticSampleTable();
for (unsigned int j=0; j<track->GetSampleDescriptionCount(); j++) {
AP4_SampleDescription* sample_description = track->GetSampleDescription(j);
sample_table->AddSampleDescription(sample_description, false);
}
// create the track
AP4_Track* output_track = new AP4_Track(sample_table,
track->GetId(),
timescale?timescale:1000,
AP4_ConvertTime(track->GetDuration(),
input_movie->GetTimeScale(),
timescale?timescale:1000),
timescale?timescale:track->GetMediaTimeScale(),
0,//track->GetMediaDuration(),
track);
output_movie->AddTrack(output_track);
// add a trex entry to the mvex container
AP4_TrexAtom* trex = new AP4_TrexAtom(track->GetId(),
1,
0,
0,
0);
mvex->AddChild(trex);
}
// select the anchor cursor
TrackCursor* anchor_cursor = NULL;
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (cursors[i]->m_Track->GetId() == track_id) {
anchor_cursor = cursors[i];
}
}
if (anchor_cursor == NULL) {
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
// use this as the anchor track if it is the first video track
if (cursors[i]->m_Track->GetType() == AP4_Track::TYPE_VIDEO) {
anchor_cursor = cursors[i];
break;
}
}
}
if (anchor_cursor == NULL) {
// no video track to anchor with, pick the first audio track
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (cursors[i]->m_Track->GetType() == AP4_Track::TYPE_AUDIO) {
anchor_cursor = cursors[i];
break;
}
}
// no audio track to anchor with, pick the first subtitles track
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (cursors[i]->m_Track->GetType() == AP4_Track::TYPE_SUBTITLES) {
anchor_cursor = cursors[i];
break;
}
}
}
if (anchor_cursor == NULL) {
// this shoudl never happen
fprintf(stderr, "ERROR: no anchor track\n");
return;
}
if (create_segment_index) {
index_cursor = anchor_cursor;
}
if (Options.debug) {
printf("Using track ID %d as anchor\n", anchor_cursor->m_Track->GetId());
}
// update the mehd duration
mehd->SetDuration(output_movie->GetDuration());
// add the mvex container to the moov container
output_movie->GetMoovAtom()->AddChild(mvex);
// compute all the fragments
unsigned int sequence_number = 1;
for(;;) {
TrackCursor* cursor = NULL;
// pick the first track with a fragment index lower than the anchor's
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (track_id && cursors[i]->m_Track->GetId() != track_id) continue;
if (cursors[i]->m_Eos) continue;
if (cursors[i]->m_FragmentIndex < anchor_cursor->m_FragmentIndex) {
cursor = cursors[i];
break;
}
}
// check if we found a non-anchor cursor to use
if (cursor == NULL) {
// the anchor should be used in this round, check if we can use it
if (anchor_cursor->m_Eos) {
// the anchor is done, pick a new anchor unless we need to trim
anchor_cursor = NULL;
if (!Options.trim) {
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (track_id && cursors[i]->m_Track->GetId() != track_id) continue;
if (cursors[i]->m_Eos) continue;
if (anchor_cursor == NULL ||
cursors[i]->m_Track->GetType() == AP4_Track::TYPE_VIDEO ||
cursors[i]->m_Track->GetType() == AP4_Track::TYPE_AUDIO) {
anchor_cursor = cursors[i];
if (Options.debug) {
printf("+++ New anchor: Track ID %d\n", anchor_cursor->m_Track->GetId());
}
}
}
}
}
cursor = anchor_cursor;
}
if (cursor == NULL) break; // all done
// decide how many samples go into this fragment
AP4_UI64 target_dts;
if (cursor == anchor_cursor) {
// compute the current dts in milliseconds
AP4_UI64 anchor_dts_ms = AP4_ConvertTime(cursor->m_Sample.GetDts(),
cursor->m_Track->GetMediaTimeScale(),
1000);
// round to the nearest multiple of fragment_duration
AP4_UI64 anchor_position = (anchor_dts_ms + (fragment_duration/2))/fragment_duration;
// pick the next fragment_duration multiple at our target
target_dts = AP4_ConvertTime(fragment_duration*(anchor_position+1),
1000,
cursor->m_Track->GetMediaTimeScale());
} else {
target_dts = AP4_ConvertTime(anchor_cursor->m_Sample.GetDts(),
anchor_cursor->m_Track->GetMediaTimeScale(),
cursor->m_Track->GetMediaTimeScale());
if (target_dts <= cursor->m_Sample.GetDts()) {
// we must be at the end, past the last anchor sample, just use the target duration
target_dts = AP4_ConvertTime(fragment_duration*(cursor->m_FragmentIndex+1),
1000,
cursor->m_Track->GetMediaTimeScale());
if (target_dts <= cursor->m_Sample.GetDts()) {
// we're still behind, there may have been an alignment/rounding error, just advance by one segment duration
target_dts = cursor->m_Sample.GetDts()+AP4_ConvertTime(fragment_duration,
1000,
cursor->m_Track->GetMediaTimeScale());
}
}
}
unsigned int end_sample_index = cursor->m_Samples->GetSampleCount();
AP4_UI64 smallest_diff = (AP4_UI64)(0xFFFFFFFFFFFFFFFFULL);
AP4_Sample sample;
for (unsigned int i=cursor->m_SampleIndex+1; i<=cursor->m_Samples->GetSampleCount(); i++) {
AP4_UI64 dts;
if (i < cursor->m_Samples->GetSampleCount()) {
result = cursor->m_Samples->GetSample(i, sample);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to get sample %d (%d)\n", i, result);
return;
}
if (!sample.IsSync()) continue; // only look for sync samples
dts = sample.GetDts();
} else {
result = cursor->m_Samples->GetSample(i-1, sample);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to get sample %d (%d)\n", i-1, result);
return;
}
dts = sample.GetDts()+sample.GetDuration();
}
AP4_SI64 diff = dts-target_dts;
AP4_UI64 abs_diff = diff<0?-diff:diff;
if (abs_diff < smallest_diff) {
// this sample is the closest to the target so far
end_sample_index = i;
smallest_diff = abs_diff;
}
if (diff >= 0) {
// this sample is past the target, it is not going to get any better, stop looking
break;
}
}
if (cursor->m_Eos) continue;
if (Options.debug) {
if (cursor == anchor_cursor) {
printf("====");
} else {
printf("----");
}
printf(" Track ID %d - dts=%lld, target=%lld, start=%d, end=%d/%d\n",
cursor->m_Track->GetId(),
cursor->m_Sample.GetDts(),
target_dts,
cursor->m_SampleIndex,
end_sample_index,
cursor->m_Track->GetSampleCount());
}
// emit a fragment for the selected track
if (Options.verbosity > 1) {
printf("fragment: track ID %d ", cursor->m_Track->GetId());
}
// decide which sample description index to use
// (this is not very sophisticated, we only look at the sample description
// index of the first sample in the group, which may not be correct. This
// should be fixed later)
unsigned int sample_desc_index = cursor->m_Sample.GetDescriptionIndex();
unsigned int tfhd_flags = AP4_TFHD_FLAG_DEFAULT_BASE_IS_MOOF;
if (sample_desc_index > 0) {
tfhd_flags |= AP4_TFHD_FLAG_SAMPLE_DESCRIPTION_INDEX_PRESENT;
}
if (cursor->m_Track->GetType() == AP4_Track::TYPE_VIDEO) {
tfhd_flags |= AP4_TFHD_FLAG_DEFAULT_SAMPLE_FLAGS_PRESENT;
}
// setup the moof structure
AP4_ContainerAtom* moof = new AP4_ContainerAtom(AP4_ATOM_TYPE_MOOF);
AP4_MfhdAtom* mfhd = new AP4_MfhdAtom(sequence_number++);
moof->AddChild(mfhd);
AP4_ContainerAtom* traf = new AP4_ContainerAtom(AP4_ATOM_TYPE_TRAF);
AP4_TfhdAtom* tfhd = new AP4_TfhdAtom(tfhd_flags,
cursor->m_Track->GetId(),
0,
sample_desc_index+1,
0,
0,
0);
if (tfhd_flags & AP4_TFHD_FLAG_DEFAULT_SAMPLE_FLAGS_PRESENT) {
tfhd->SetDefaultSampleFlags(0x1010000); // sample_is_non_sync_sample=1, sample_depends_on=1 (not I frame)
}
traf->AddChild(tfhd);
if (!Options.no_tfdt) {
AP4_TfdtAtom* tfdt = new AP4_TfdtAtom(1, cursor->m_Timestamp);
traf->AddChild(tfdt);
}
AP4_UI32 trun_flags = AP4_TRUN_FLAG_DATA_OFFSET_PRESENT |
AP4_TRUN_FLAG_SAMPLE_DURATION_PRESENT |
AP4_TRUN_FLAG_SAMPLE_SIZE_PRESENT;
AP4_UI32 first_sample_flags = 0;
if (cursor->m_Track->GetType() == AP4_Track::TYPE_VIDEO) {
trun_flags |= AP4_TRUN_FLAG_FIRST_SAMPLE_FLAGS_PRESENT;
first_sample_flags = 0x2000000; // sample_depends_on=2 (I frame)
}
AP4_TrunAtom* trun = new AP4_TrunAtom(trun_flags, 0, first_sample_flags);
traf->AddChild(trun);
moof->AddChild(traf);
// create a new FragmentInfo object to store the fragment details
FragmentInfo* fragment = new FragmentInfo(cursor->m_Samples, cursor->m_Tfra, cursor->m_Timestamp, moof);
fragments.Add(fragment);
// add samples to the fragment
unsigned int sample_count = 0;
AP4_Array<AP4_TrunAtom::Entry> trun_entries;
fragment->m_MdatSize = AP4_ATOM_HEADER_SIZE;
for (;;) {
// if we have one non-zero CTS delta, we'll need to express it
if (cursor->m_Sample.GetCtsDelta()) {
trun->SetFlags(trun->GetFlags() | AP4_TRUN_FLAG_SAMPLE_COMPOSITION_TIME_OFFSET_PRESENT);
}
// add one sample
trun_entries.SetItemCount(sample_count+1);
AP4_TrunAtom::Entry& trun_entry = trun_entries[sample_count];
trun_entry.sample_duration = timescale?
(AP4_UI32)AP4_ConvertTime(cursor->m_Sample.GetDuration(),
cursor->m_Track->GetMediaTimeScale(),
timescale):
cursor->m_Sample.GetDuration();
trun_entry.sample_size = cursor->m_Sample.GetSize();
trun_entry.sample_composition_time_offset = timescale?
(AP4_UI32)AP4_ConvertTime(cursor->m_Sample.GetCtsDelta(),
cursor->m_Track->GetMediaTimeScale(),
timescale):
cursor->m_Sample.GetCtsDelta();
fragment->m_SampleIndexes.SetItemCount(sample_count+1);
fragment->m_SampleIndexes[sample_count] = cursor->m_SampleIndex;
fragment->m_MdatSize += trun_entry.sample_size;
fragment->m_Duration += trun_entry.sample_duration;
// next sample
cursor->m_Timestamp += trun_entry.sample_duration;
result = cursor->SetSampleIndex(cursor->m_SampleIndex+1);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to get sample %d (%d)\n", cursor->m_SampleIndex+1, result);
return;
}
sample_count++;
if (cursor->m_Eos) {
if (Options.debug) {
printf("[Track ID %d has reached the end]\n", cursor->m_Track->GetId());
}
break;
}
if (cursor->m_SampleIndex >= end_sample_index) {
break; // done with this fragment
}
}
if (Options.verbosity > 1) {
printf(" %d samples\n", sample_count);
}
// update moof and children
trun->SetEntries(trun_entries);
trun->SetDataOffset((AP4_UI32)moof->GetSize()+AP4_ATOM_HEADER_SIZE);
// advance the cursor's fragment index
++cursor->m_FragmentIndex;
}
// write the ftyp atom
AP4_FtypAtom* ftyp = input_file.GetFileType();
if (ftyp) {
// keep the existing brand and compatible brands
AP4_Array<AP4_UI32> compatible_brands;
compatible_brands.EnsureCapacity(ftyp->GetCompatibleBrands().ItemCount()+1);
for (unsigned int i=0; i<ftyp->GetCompatibleBrands().ItemCount(); i++) {
compatible_brands.Append(ftyp->GetCompatibleBrands()[i]);
}
// add the compatible brand if it is not already there
if (!ftyp->HasCompatibleBrand(AP4_FILE_BRAND_ISO5)) {
compatible_brands.Append(AP4_FILE_BRAND_ISO5);
}
// create a replacement
AP4_FtypAtom* new_ftyp = new AP4_FtypAtom(ftyp->GetMajorBrand(),
ftyp->GetMinorVersion(),
&compatible_brands[0],
compatible_brands.ItemCount());
ftyp = new_ftyp;
} else {
AP4_UI32 compat = AP4_FILE_BRAND_ISO5;
ftyp = new AP4_FtypAtom(AP4_FTYP_BRAND_MP42, 0, &compat, 1);
}
ftyp->Write(output_stream);
delete ftyp;
// write the moov atom
output_movie->GetMoovAtom()->Write(output_stream);
// write the (not-yet fully computed) index if needed
AP4_SidxAtom* sidx = NULL;
AP4_Position sidx_position = 0;
output_stream.Tell(sidx_position);
if (create_segment_index) {
sidx = new AP4_SidxAtom(index_cursor->m_Track->GetId(),
index_cursor->m_Track->GetMediaTimeScale(),
0,
0);
// reserve space for the entries now, but they will be computed and updated later
sidx->SetReferenceCount(fragments.ItemCount());
sidx->Write(output_stream);
}
// write all fragments
for (AP4_List<FragmentInfo>::Item* item = fragments.FirstItem();
item;
item = item->GetNext()) {
FragmentInfo* fragment = item->GetData();
// remember the time and position of this fragment
output_stream.Tell(fragment->m_MoofPosition);
fragment->m_Tfra->AddEntry(fragment->m_Timestamp, fragment->m_MoofPosition);
// write the moof
fragment->m_Moof->Write(output_stream);
// write mdat
output_stream.WriteUI32(fragment->m_MdatSize);
output_stream.WriteUI32(AP4_ATOM_TYPE_MDAT);
AP4_DataBuffer sample_data;
AP4_Sample sample;
for (unsigned int i=0; i<fragment->m_SampleIndexes.ItemCount(); i++) {
// get the sample
result = fragment->m_Samples->GetSample(fragment->m_SampleIndexes[i], sample);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to get sample %d (%d)\n", fragment->m_SampleIndexes[i], result);
return;
}
// read the sample data
result = sample.ReadData(sample_data);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to read sample data for sample %d (%d)\n", fragment->m_SampleIndexes[i], result);
return;
}
// write the sample data
result = output_stream.Write(sample_data.GetData(), sample_data.GetDataSize());
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to write sample data (%d)\n", result);
return;
}
}
}
// update the index and re-write it if needed
if (create_segment_index) {
unsigned int segment_index = 0;
AP4_SidxAtom::Reference reference;
for (AP4_List<FragmentInfo>::Item* item = fragments.FirstItem();
item;
item = item->GetNext()) {
FragmentInfo* fragment = item->GetData();
reference.m_ReferencedSize = (AP4_UI32)(fragment->m_Moof->GetSize()+fragment->m_MdatSize);
reference.m_SubsegmentDuration = fragment->m_Duration;
reference.m_StartsWithSap = true;
sidx->SetReference(segment_index++, reference);
}
AP4_Position here = 0;
output_stream.Tell(here);
output_stream.Seek(sidx_position);
sidx->Write(output_stream);
output_stream.Seek(here);
delete sidx;
}
// create an mfra container and write out the index
AP4_ContainerAtom mfra(AP4_ATOM_TYPE_MFRA);
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
if (track_id && cursors[i]->m_Track->GetId() != track_id) {
continue;
}
mfra.AddChild(cursors[i]->m_Tfra);
cursors[i]->m_Tfra = NULL;
}
AP4_MfroAtom* mfro = new AP4_MfroAtom((AP4_UI32)mfra.GetSize()+16);
mfra.AddChild(mfro);
result = mfra.Write(output_stream);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to write 'mfra' (%d)\n", result);
return;
}
// cleanup
fragments.DeleteReferences();
for (unsigned int i=0; i<cursors.ItemCount(); i++) {
delete cursors[i];
}
for (AP4_List<FragmentInfo>::Item* item = fragments.FirstItem();
item;
item = item->GetNext()) {
FragmentInfo* fragment = item->GetData();
delete fragment->m_Moof;
}
delete output_movie;
}
/*----------------------------------------------------------------------
| AP4_Processor::Process
+---------------------------------------------------------------------*/
AP4_Result
AP4_Processor::Process(AP4_ByteStream& input,
AP4_ByteStream& output,
AP4_ByteStream* fragments,
ProgressListener* listener,
AP4_AtomFactory& atom_factory)
{
// read all atoms.
// keep all atoms except [mdat]
// keep a ref to [moov]
// put [moof] atoms in a separate list
AP4_AtomParent top_level;
AP4_MoovAtom* moov = NULL;
AP4_ContainerAtom* mfra = NULL;
AP4_SidxAtom* sidx = NULL;
AP4_List<AP4_AtomLocator> frags;
AP4_UI64 stream_offset = 0;
bool in_fragments = false;
unsigned int sidx_count = 0;
for (AP4_Atom* atom = NULL;
AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(input, atom));
input.Tell(stream_offset)) {
if (atom->GetType() == AP4_ATOM_TYPE_MDAT) {
delete atom;
continue;
} else if (atom->GetType() == AP4_ATOM_TYPE_MOOV) {
moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, atom);
if (fragments) break;
} else if (atom->GetType() == AP4_ATOM_TYPE_MFRA) {
mfra = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
continue;
} else if (atom->GetType() == AP4_ATOM_TYPE_SIDX) {
// don't keep the index, it is likely to be invalidated, we will recompute it later
++sidx_count;
if (sidx == NULL) {
sidx = AP4_DYNAMIC_CAST(AP4_SidxAtom, atom);
} else {
delete atom;
continue;
}
} else if (atom->GetType() == AP4_ATOM_TYPE_SSIX) {
// don't keep the index, it is likely to be invalidated
delete atom;
continue;
} else if (!fragments && (in_fragments || atom->GetType() == AP4_ATOM_TYPE_MOOF)) {
in_fragments = true;
frags.Add(new AP4_AtomLocator(atom, stream_offset));
break;
}
top_level.AddChild(atom);
}
// check that we have at most one sidx (we can't deal with multi-sidx streams here
if (sidx_count > 1) {
top_level.RemoveChild(sidx);
delete sidx;
sidx = NULL;
}
// if we have a fragments stream, get the fragment locators from there
if (fragments) {
stream_offset = 0;
for (AP4_Atom* atom = NULL;
AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(*fragments, atom));
fragments->Tell(stream_offset)) {
if (atom->GetType() == AP4_ATOM_TYPE_MDAT) {
delete atom;
continue;
}
frags.Add(new AP4_AtomLocator(atom, stream_offset));
}
}
// initialize the processor
AP4_Result result = Initialize(top_level, input);
if (AP4_FAILED(result)) return result;
// process the tracks if we have a moov atom
AP4_Array<AP4_SampleLocator> locators;
AP4_Cardinal track_count = 0;
AP4_List<AP4_TrakAtom>* trak_atoms = NULL;
AP4_LargeSize mdat_payload_size = 0;
AP4_SampleCursor* cursors = NULL;
if (moov) {
// build an array of track sample locators
trak_atoms = &moov->GetTrakAtoms();
track_count = trak_atoms->ItemCount();
cursors = new AP4_SampleCursor[track_count];
m_TrackData.SetItemCount(track_count);
m_StreamData.SetItemCount(1);
m_StreamData[0].stream = &input;
unsigned int index = 0;
for (AP4_List<AP4_TrakAtom>::Item* item = trak_atoms->FirstItem(); item; item=item->GetNext()) {
AP4_TrakAtom* trak = item->GetData();
// find the stsd atom
AP4_ContainerAtom* stbl = AP4_DYNAMIC_CAST(AP4_ContainerAtom, trak->FindChild("mdia/minf/stbl"));
if (stbl == NULL) continue;
// see if there's an external data source for this track
AP4_ByteStream* trak_data_stream = &input;
for (AP4_List<ExternalTrackData>::Item* ditem = m_ExternalTrackData.FirstItem(); ditem; ditem=ditem->GetNext()) {
ExternalTrackData* tdata = ditem->GetData();
if (tdata->m_TrackId == trak->GetId()) {
trak_data_stream = tdata->m_MediaData;
break;
}
}
AP4_ContainerAtom *mvex = AP4_DYNAMIC_CAST(AP4_ContainerAtom, moov->GetChild(AP4_ATOM_TYPE_MVEX));
AP4_TrexAtom* trex = NULL;
if (mvex) {
for (AP4_List<AP4_Atom>::Item* item = mvex->GetChildren().FirstItem(); item; item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() == AP4_ATOM_TYPE_TREX) {
trex = AP4_DYNAMIC_CAST(AP4_TrexAtom, atom);
if (trex && trex->GetTrackId() == trak->GetId())
break;
trex = NULL;
}
}
}
// create the track handler
m_TrackData[index].track_handler = CreateTrackHandler(trak, trex);
m_TrackData[index].new_id = trak->GetId();
cursors[index].m_Locator.m_TrakIndex = index;
cursors[index].m_Locator.m_SampleTable = new AP4_AtomSampleTable(stbl, *trak_data_stream);
cursors[index].m_Locator.m_SampleIndex = 0;
cursors[index].m_Locator.m_ChunkIndex = 0;
if (cursors[index].m_Locator.m_SampleTable->GetSampleCount()) {
cursors[index].m_Locator.m_SampleTable->GetSample(0, cursors[index].m_Locator.m_Sample);
} else {
cursors[index].m_EndReached = true;
}
index++;
}
// figure out the layout of the chunks
for (;;) {
// see which is the next sample to write
AP4_UI64 min_offset = (AP4_UI64)(-1);
int cursor = -1;
for (unsigned int i=0; i<track_count; i++) {
if (!cursors[i].m_EndReached &&
cursors[i].m_Locator.m_Sample.GetOffset() <= min_offset) {
min_offset = cursors[i].m_Locator.m_Sample.GetOffset();
cursor = i;
}
}
// stop if all cursors are exhausted
if (cursor == -1) break;
// append this locator to the layout list
AP4_SampleLocator& locator = cursors[cursor].m_Locator;
locators.Append(locator);
// move the cursor to the next sample
locator.m_SampleIndex++;
if (locator.m_SampleIndex == locator.m_SampleTable->GetSampleCount()) {
// mark this track as completed
cursors[cursor].m_EndReached = true;
} else {
// get the next sample info
locator.m_SampleTable->GetSample(locator.m_SampleIndex, locator.m_Sample);
AP4_Ordinal skip, sdesc;
locator.m_SampleTable->GetChunkForSample(locator.m_SampleIndex,
locator.m_ChunkIndex,
skip, sdesc);
}
}
// update the stbl atoms and compute the mdat size
int current_track = -1;
int current_chunk = -1;
AP4_Position current_chunk_offset = 0;
AP4_Size current_chunk_size = 0;
for (AP4_Ordinal i=0; i<locators.ItemCount(); i++) {
AP4_SampleLocator& locator = locators[i];
if ((int)locator.m_TrakIndex != current_track ||
(int)locator.m_ChunkIndex != current_chunk) {
// start a new chunk for this track
current_chunk_offset += current_chunk_size;
current_chunk_size = 0;
current_track = locator.m_TrakIndex;
current_chunk = locator.m_ChunkIndex;
locator.m_SampleTable->SetChunkOffset(locator.m_ChunkIndex, current_chunk_offset);
}
AP4_Size sample_size;
TrackHandler* handler = m_TrackData[locator.m_TrakIndex].track_handler;
if (handler) {
sample_size = handler->GetProcessedSampleSize(locator.m_Sample);
locator.m_SampleTable->SetSampleSize(locator.m_SampleIndex, sample_size);
} else {
sample_size = locator.m_Sample.GetSize();
}
current_chunk_size += sample_size;
mdat_payload_size += sample_size;
}
// process the tracks (ex: sample descriptions processing)
for (AP4_Ordinal i=0; i<track_count; i++) {
TrackHandler* handler = m_TrackData[i].track_handler;
if (handler)
handler->ProcessTrack();
}
}
// finalize the processor
Finalize(top_level);
if (!fragments) {
// calculate the size of all atoms combined
AP4_UI64 atoms_size = 0;
top_level.GetChildren().Apply(AP4_AtomSizeAdder(atoms_size));
// see if we need a 64-bit or 32-bit mdat
AP4_Size mdat_header_size = AP4_ATOM_HEADER_SIZE;
if (mdat_payload_size+mdat_header_size > 0xFFFFFFFF) {
// we need a 64-bit size
mdat_header_size += 8;
}
// adjust the chunk offsets
for (AP4_Ordinal i=0; i<track_count; i++) {
AP4_TrakAtom* trak;
trak_atoms->Get(i, trak);
trak->AdjustChunkOffsets(atoms_size+mdat_header_size);
}
// write all atoms
top_level.GetChildren().Apply(AP4_AtomListWriter(output));
// write mdat header
if (mdat_payload_size) {
if (mdat_header_size == AP4_ATOM_HEADER_SIZE) {
// 32-bit size
output.WriteUI32((AP4_UI32)(mdat_header_size+mdat_payload_size));
output.WriteUI32(AP4_ATOM_TYPE_MDAT);
} else {
// 64-bit size
output.WriteUI32(1);
output.WriteUI32(AP4_ATOM_TYPE_MDAT);
output.WriteUI64(mdat_header_size+mdat_payload_size);
}
}
}
// write the samples
if (moov) {
if (!fragments) {
#if defined(AP4_DEBUG)
AP4_Position before;
output.Tell(before);
#endif
AP4_Sample sample;
AP4_DataBuffer data_in;
AP4_DataBuffer data_out;
for (unsigned int i=0; i<locators.ItemCount(); i++) {
AP4_SampleLocator& locator = locators[i];
locator.m_Sample.ReadData(data_in);
TrackHandler* handler = m_TrackData[locator.m_TrakIndex].track_handler;
if (handler) {
result = handler->ProcessSample(data_in, data_out);
if (AP4_FAILED(result)) return result;
output.Write(data_out.GetData(), data_out.GetDataSize());
} else {
output.Write(data_in.GetData(), data_in.GetDataSize());
}
// notify the progress listener
if (listener) {
listener->OnProgress(i+1, locators.ItemCount());
}
}
#if defined(AP4_DEBUG)
AP4_Position after;
output.Tell(after);
AP4_ASSERT(after-before == mdat_payload_size);
#endif
}
else
m_StreamData[0].stream = fragments;
// find the position of the sidx atom
AP4_Position sidx_position = 0;
if (sidx) {
for (AP4_List<AP4_Atom>::Item* item = top_level.GetChildren().FirstItem();
item;
item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() == AP4_ATOM_TYPE_SIDX) {
break;
}
sidx_position += atom->GetSize();
}
}
// process the fragments, if any
AP4_Array<AP4_Position> moof_offsets, mdat_offsets;
moof_offsets.SetItemCount(1);
mdat_offsets.SetItemCount(1);
while (frags.ItemCount() > 0)
{
for (AP4_List<AP4_AtomLocator>::Item *locator(frags.FirstItem()); locator; locator = locator->GetNext())
{
AP4_ContainerAtom *moof(AP4_DYNAMIC_CAST(AP4_ContainerAtom, locator->GetData()->m_Atom));
moof_offsets[0] = locator->GetData()->m_Offset;
mdat_offsets[0] = moof_offsets[0] + moof->GetSize() + AP4_ATOM_HEADER_SIZE;
result = ProcessFragment(moof, sidx, sidx_position, output, moof_offsets, mdat_offsets);
if (AP4_FAILED(result))
return result;
}
frags.DeleteReferences();
AP4_Atom* atom = NULL;
input.Tell(stream_offset);
if (AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(input, atom)))
{
if (atom->GetType() == AP4_ATOM_TYPE_MOOF)
frags.Add(new AP4_AtomLocator(atom, stream_offset));
else
delete atom;
}
}
// update the mfra if we have one
if (mfra) {
for (AP4_List<AP4_Atom>::Item* mfra_item = mfra->GetChildren().FirstItem(); mfra_item; mfra_item = mfra_item->GetNext())
{
if (mfra_item->GetData()->GetType() != AP4_ATOM_TYPE_TFRA)
continue;
AP4_TfraAtom* tfra = AP4_DYNAMIC_CAST(AP4_TfraAtom, mfra_item->GetData());
if (tfra == NULL)
continue;
AP4_Array<AP4_TfraAtom::Entry>& entries = tfra->GetEntries();
AP4_Cardinal entry_count = entries.ItemCount();
for (unsigned int i = 0; i<entry_count; i++) {
entries[i].m_MoofOffset = FindFragmentMapEntry(entries[i].m_MoofOffset);
}
}
}
// update and re-write the sidx if we have one
if (sidx && sidx_position) {
AP4_Position where = 0;
output.Tell(where);
output.Seek(sidx_position);
result = sidx->Write(output);
if (AP4_FAILED(result)) return result;
output.Seek(where);
}
if (!fragments) {
// write the mfra atom at the end if we have one
if (mfra) {
mfra->Write(output);
}
}
// cleanup
for (AP4_Ordinal i=0; i<track_count; i++)
delete cursors[i].m_Locator.m_SampleTable;
m_TrackData.Clear();
delete[] cursors;
}
// cleanup
frags.DeleteReferences();
delete mfra;
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_Processor::ProcessFragments
+---------------------------------------------------------------------*/
AP4_Result
AP4_Processor::ProcessFragment( AP4_ContainerAtom* moof,
AP4_SidxAtom* sidx,
AP4_Position sidx_position,
AP4_ByteStream& output,
AP4_Array<AP4_Position>& moof_positions,
AP4_Array<AP4_Position>& mdat_positions)
{
unsigned int fragment_index = 0;
//AP4_UI64 mdat_payload_offset = atom_offset+atom->GetSize()+AP4_ATOM_HEADER_SIZE;
AP4_Sample sample;
AP4_DataBuffer sample_data_in;
AP4_DataBuffer sample_data_out;
AP4_Result result = AP4_SUCCESS;
// parse the moof
//AP4_MovieFragment* fragment = new AP4_MovieFragment(moof);
// process all the traf atoms
AP4_Array<AP4_Processor::FragmentHandler*> handlers;
AP4_Array<AP4_FragmentSampleTable*> sample_tables;
for (; AP4_Atom* child = moof->GetChild(AP4_ATOM_TYPE_TRAF, handlers.ItemCount());) {
AP4_TrafAtom* traf = AP4_DYNAMIC_CAST(AP4_TrafAtom, child);
PERTRACK &track_data(m_TrackData[traf->GetInternalTrackId()]);
AP4_TrakAtom* trak = track_data.track_handler->GetTrakAtom();
AP4_TrexAtom* trex = track_data.track_handler->GetTrexAtom();
// create the handler for this traf
AP4_Processor::FragmentHandler* handler = CreateFragmentHandler(trak, trex, traf,
*(m_StreamData[track_data.streamId].stream),
moof_positions[track_data.streamId]);
if (handler) {
result = handler->ProcessFragment();
if (AP4_FAILED(result)) return result;
}
handlers.Append(handler);
// create a sample table object so we can read the sample data
AP4_FragmentSampleTable* sample_table = new AP4_FragmentSampleTable(
traf,
trex,
traf->GetInternalTrackId(),
m_StreamData[track_data.streamId].stream,
moof_positions[traf->GetInternalTrackId()],
mdat_positions[traf->GetInternalTrackId()],
0);
sample_tables.Append(sample_table);
// let the handler look at the samples before we process them
if (handler)
result = handler->PrepareForSamples(sample_table);
if (AP4_FAILED(result))
return result;
}
output.Buffer();
// write the moof
AP4_UI64 moof_out_start = 0;
output.Tell(moof_out_start);
moof->Write(output);
// remember the location of this fragment
FragmentMapEntry map_entry = { moof_positions[0], moof_out_start };
fragment_map_.Append(map_entry);
// write an mdat header
AP4_Position mdat_out_start;
AP4_UI64 mdat_size = AP4_ATOM_HEADER_SIZE;
output.Tell(mdat_out_start);
output.WriteUI32(0);
output.WriteUI32(AP4_ATOM_TYPE_MDAT);
// process all track runs
for (unsigned int i=0; i<handlers.ItemCount(); i++) {
AP4_Processor::FragmentHandler* handler = handlers[i];
// get the track ID
AP4_ContainerAtom* traf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, moof->GetChild(AP4_ATOM_TYPE_TRAF, i));
if (traf == NULL) continue;
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, traf->GetChild(AP4_ATOM_TYPE_TFHD));
// compute the base data offset
AP4_UI64 base_data_offset;
if (tfhd->GetFlags() & AP4_TFHD_FLAG_BASE_DATA_OFFSET_PRESENT) {
base_data_offset = mdat_out_start+AP4_ATOM_HEADER_SIZE;
} else {
base_data_offset = moof_out_start;
}
// build a list of all trun atoms
AP4_Array<AP4_TrunAtom*> truns;
for (AP4_List<AP4_Atom>::Item* child_item = traf->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, child_atom);
truns.Append(trun);
}
}
AP4_Ordinal trun_index = 0;
AP4_Ordinal trun_sample_index = 0;
AP4_TrunAtom* trun = truns[0];
trun->SetDataOffset((AP4_SI32)((mdat_out_start+mdat_size)-base_data_offset));
// write the mdat
for (unsigned int j=0; j<sample_tables[i]->GetSampleCount(); j++, trun_sample_index++) {
// advance the trun index if necessary
if (trun_sample_index >= trun->GetEntries().ItemCount()) {
trun = truns[++trun_index];
trun->SetDataOffset((AP4_SI32)((mdat_out_start+mdat_size)-base_data_offset));
trun_sample_index = 0;
}
// get the next sample
result = sample_tables[i]->GetSample(j, sample);
if (AP4_FAILED(result)) return result;
sample.ReadData(sample_data_in);
m_TrackData[sample_tables[i]->GetInteralTrackId()].dts = sample.GetDts();
// process the sample data
if (handler) {
result = handler->ProcessSample(sample_data_in, sample_data_out);
if (AP4_FAILED(result)) return result;
// write the sample data
result = output.Write(sample_data_out.GetData(), sample_data_out.GetDataSize());
if (AP4_FAILED(result)) return result;
// update the mdat size
mdat_size += sample_data_out.GetDataSize();
// update the trun entry
trun->UseEntries()[trun_sample_index].sample_size = sample_data_out.GetDataSize();
} else {
// write the sample data (unmodified)
result = output.Write(sample_data_in.GetData(), sample_data_in.GetDataSize());
if (AP4_FAILED(result)) return result;
// update the mdat size
mdat_size += sample_data_in.GetDataSize();
}
}
if (handler) {
// update the tfhd header
if (tfhd->GetFlags() & AP4_TFHD_FLAG_BASE_DATA_OFFSET_PRESENT) {
tfhd->SetBaseDataOffset(mdat_out_start+AP4_ATOM_HEADER_SIZE);
}
if (tfhd->GetFlags() & AP4_TFHD_FLAG_DEFAULT_SAMPLE_SIZE_PRESENT) {
tfhd->SetDefaultSampleSize(trun->GetEntries()[0].sample_size);
}
// give the handler a chance to update the atoms
handler->FinishFragment();
}
}
// update the mdat header
AP4_Position mdat_out_end;
output.Tell(mdat_out_end);
#if defined(AP4_DEBUG)
AP4_ASSERT(mdat_out_end-mdat_out_start == mdat_size);
#endif
if (AP4_FAILED(result = output.Seek(mdat_out_start)))
return result;
output.WriteUI32((AP4_UI32)mdat_size);
output.Seek(mdat_out_end);
// update the moof if needed
if (AP4_FAILED(result = output.Seek(moof_out_start)))
return result;
moof->Write(output);
output.Seek(mdat_out_end);
// update the sidx if we have one
if (sidx && fragment_index < sidx->GetReferences().ItemCount()) {
if (fragment_index == 0) {
sidx->SetFirstOffset(moof_out_start-(sidx_position+sidx->GetSize()));
}
AP4_LargeSize fragment_size = mdat_out_end-moof_out_start;
AP4_SidxAtom::Reference& sidx_ref = sidx->UseReferences()[fragment_index];
sidx_ref.m_ReferencedSize = (AP4_UI32)fragment_size;
}
// cleanup
//delete fragment;
for (unsigned int i=0; i<handlers.ItemCount(); i++) {
delete handlers[i];
}
for (unsigned int i=0; i<sample_tables.ItemCount(); i++) {
delete sample_tables[i];
}
if (AP4_FAILED(result = output.Flush()))
return result;
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_TrakAtom::AP4_TrakAtom
+---------------------------------------------------------------------*/
AP4_TrakAtom::AP4_TrakAtom(AP4_SampleTable* sample_table,
AP4_Atom::Type hdlr_type,
const char* hdlr_name,
AP4_UI32 track_id,
AP4_UI32 creation_time,
AP4_UI32 modification_time,
AP4_UI64 track_duration,
AP4_UI32 media_time_scale,
AP4_UI64 media_duration,
AP4_UI16 volume,
const char* language,
AP4_UI32 width,
AP4_UI32 height) :
AP4_ContainerAtom(AP4_ATOM_TYPE_TRAK)
{
AP4_Result result;
// create a tkhd atom
m_TkhdAtom = new AP4_TkhdAtom(creation_time,
modification_time,
track_id,
track_duration,
volume,
width,
height);
// create an edts
// create a mdia atom
AP4_ContainerAtom* mdia = new AP4_ContainerAtom(AP4_ATOM_TYPE_MDIA);
// create a hdlr atom for the mdia atom
AP4_HdlrAtom* hdlr = new AP4_HdlrAtom(hdlr_type, hdlr_name);
// create a minf atom
AP4_ContainerAtom* minf = new AP4_ContainerAtom(AP4_ATOM_TYPE_MINF);
// create a media header atom for minf (vmhd, smhd, hmhd or nmhd)
AP4_Atom* minf_header;
switch (hdlr_type) {
case AP4_HANDLER_TYPE_VIDE:
minf_header = new AP4_VmhdAtom(0, 0, 0, 0);
break;
case AP4_HANDLER_TYPE_SOUN:
minf_header = new AP4_SmhdAtom(0);
break;
default:
minf_header = new AP4_NmhdAtom();
break;
}
// create a dinf atom for minf
AP4_ContainerAtom* dinf = new AP4_ContainerAtom(AP4_ATOM_TYPE_DINF);
// create a url atom as a ref for dref
AP4_Atom* url = new AP4_UrlAtom(); // local ref
// create a dref atom for dinf
AP4_DrefAtom* dref = new AP4_DrefAtom(&url, 1);
// create a stbl atom for minf
AP4_ContainerAtom* stbl;
result = sample_table->GenerateStblAtom(stbl);
if (AP4_FAILED(result)) stbl = NULL;
// populate the dinf atom
dinf->AddChild(dref);
// populate the minf atom
minf->AddChild(minf_header);
minf->AddChild(dinf);
if (stbl) minf->AddChild(stbl);
// create a mdhd atom for the mdia atom
m_MdhdAtom = new AP4_MdhdAtom(creation_time,
modification_time,
media_time_scale,
media_duration,
language);
// populate the mdia atom
mdia->AddChild(m_MdhdAtom);
mdia->AddChild(hdlr);
mdia->AddChild(minf);
// attach the children
AddChild(m_TkhdAtom);
AddChild(mdia);
}
/*----------------------------------------------------------------------
| main
+---------------------------------------------------------------------*/
int
main(int argc, char** argv)
{
if (argc < 2) {
PrintUsageAndExit();
}
// default options
Options.verbose = false;
Options.input = NULL;
Options.init_segment_name = AP4_SPLIT_DEFAULT_INIT_SEGMENT_NAME;
Options.media_segment_name = AP4_SPLIT_DEFAULT_MEDIA_SEGMENT_NAME;
Options.pattern_params = AP4_SPLIT_DEFAULT_PATTERN_PARAMS;
Options.start_number = 1;
Options.track_id = 0;
Options.audio_only = false;
Options.video_only = false;
Options.init_only = false;
Options.track_filter = 0;
// parse command line
AP4_Result result;
char** args = argv+1;
while (const char* arg = *args++) {
if (!strcmp(arg, "--verbose")) {
Options.verbose = true;
} else if (!strcmp(arg, "--init-segment")) {
if (*args == NULL) {
fprintf(stderr, "ERROR: missing argument after --init-segment option\n");
return 1;
}
Options.init_segment_name = *args++;
} else if (!strcmp(arg, "--media-segment")) {
if (*args == NULL) {
fprintf(stderr, "ERROR: missing argument after --media-segment option\n");
return 1;
}
Options.media_segment_name = *args++;
} else if (!strcmp(arg, "--pattern-parameters")) {
if (*args == NULL) {
fprintf(stderr, "ERROR: missing argument after --pattern-params option\n");
return 1;
}
Options.pattern_params = *args++;
} else if (!strcmp(arg, "--track-id")) {
Options.track_id = strtoul(*args++, NULL, 10);
} else if (!strcmp(arg, "--start-number")) {
Options.start_number = strtoul(*args++, NULL, 10);
} else if (!strcmp(arg, "--init-only")) {
Options.init_only = true;
} else if (!strcmp(arg, "--audio")) {
Options.audio_only = true;
} else if (!strcmp(arg, "--video")) {
Options.video_only = true;
} else if (Options.input == NULL) {
Options.input = arg;
} else {
fprintf(stderr, "ERROR: unexpected argument\n");
return 1;
}
}
// check args
if (Options.input == NULL) {
fprintf(stderr, "ERROR: missing input file name\n");
return 1;
}
if ((Options.audio_only && (Options.video_only || Options.track_id)) ||
(Options.video_only && (Options.audio_only || Options.track_id)) ||
(Options.track_id && (Options.audio_only || Options.video_only))) {
fprintf(stderr, "ERROR: --audio, --video and --track-id options are mutualy exclusive\n");
return 1;
}
if (strlen(Options.pattern_params) < 1) {
fprintf(stderr, "ERROR: --pattern-params argument is too short\n");
return 1;
}
if (strlen(Options.pattern_params) > 2) {
fprintf(stderr, "ERROR: --pattern-params argument is too long\n");
return 1;
}
const char* cursor = Options.pattern_params;
while (*cursor) {
if (*cursor != 'I' && *cursor != 'N') {
fprintf(stderr, "ERROR: invalid pattern parameter '%c'\n", *cursor);
return 1;
}
++cursor;
}
// create the input stream
AP4_ByteStream* input = NULL;
result = AP4_FileByteStream::Create(Options.input, AP4_FileByteStream::STREAM_MODE_READ, input);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input (%d)\n", result);
return 1;
}
// get the movie
AP4_File* file = new AP4_File(*input, AP4_DefaultAtomFactory::Instance, true);
AP4_Movie* movie = file->GetMovie();
if (movie == NULL) {
fprintf(stderr, "no movie found in file\n");
return 1;
}
// filter tracks if required
if (Options.audio_only) {
AP4_Track* track = movie->GetTrack(AP4_Track::TYPE_AUDIO);
if (track == NULL) {
fprintf(stderr, "--audio option specified, but no audio track found\n");
return 1;
}
Options.track_filter = track->GetId();
} else if (Options.video_only) {
AP4_Track* track = movie->GetTrack(AP4_Track::TYPE_VIDEO);
if (track == NULL) {
fprintf(stderr, "--video option specified, but no video track found\n");
return 1;
}
Options.track_filter = track->GetId();
} else if (Options.track_id) {
AP4_Track* track = movie->GetTrack(Options.track_id);
if (track == NULL) {
fprintf(stderr, "--track-id option specified, but no such track found\n");
return 1;
}
Options.track_filter = track->GetId();
}
// save the init segment
AP4_ByteStream* output = NULL;
result = AP4_FileByteStream::Create(Options.init_segment_name, AP4_FileByteStream::STREAM_MODE_WRITE, output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open output file (%d)\n", result);
return 1;
}
AP4_FtypAtom* ftyp = file->GetFileType();
if (ftyp) {
result = ftyp->Write(*output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot write ftyp segment (%d)\n", result);
return 1;
}
}
if (Options.track_filter) {
AP4_MoovAtom* moov = movie->GetMoovAtom();
// only keep the 'trak' atom that we need
AP4_List<AP4_Atom>::Item* child = moov->GetChildren().FirstItem();
while (child) {
AP4_Atom* atom = child->GetData();
child = child->GetNext();
if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
AP4_TrakAtom* trak = (AP4_TrakAtom*)atom;
AP4_TkhdAtom* tkhd = (AP4_TkhdAtom*)trak->GetChild(AP4_ATOM_TYPE_TKHD);
if (tkhd && tkhd->GetTrackId() != Options.track_filter) {
atom->Detach();
delete atom;
}
}
}
// only keep the 'trex' atom that we need
AP4_ContainerAtom* mvex = AP4_DYNAMIC_CAST(AP4_ContainerAtom, moov->GetChild(AP4_ATOM_TYPE_MVEX));
if (mvex) {
child = mvex->GetChildren().FirstItem();
while (child) {
AP4_Atom* atom = child->GetData();
child = child->GetNext();
if (atom->GetType() == AP4_ATOM_TYPE_TREX) {
AP4_TrexAtom* trex = AP4_DYNAMIC_CAST(AP4_TrexAtom, atom);
if (trex && trex->GetTrackId() != Options.track_filter) {
atom->Detach();
delete atom;
}
}
}
}
}
result = movie->GetMoovAtom()->Write(*output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot write init segment (%d)\n", result);
return 1;
}
AP4_Atom* atom = NULL;
unsigned int track_id = 0;
for (;!Options.init_only;) {
// process the next atom
result = AP4_DefaultAtomFactory::Instance.CreateAtomFromStream(*input, atom);
if (AP4_FAILED(result)) break;
if (atom->GetType() == AP4_ATOM_TYPE_MOOF) {
AP4_ContainerAtom* moof = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
unsigned int traf_count = 0;
AP4_ContainerAtom* traf = NULL;
do {
traf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, moof->GetChild(AP4_ATOM_TYPE_TRAF, traf_count));
if (traf == NULL) break;
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, traf->GetChild(AP4_ATOM_TYPE_TFHD));
if (tfhd == NULL) {
fprintf(stderr, "ERROR: invalid media format\n");
return 1;
}
track_id = tfhd->GetTrackId();
traf_count++;
} while (traf);
// check if this fragment has more than one traf
if (traf_count > 1) {
if (Options.audio_only) {
fprintf(stderr, "ERROR: --audio option incompatible with multi-track fragments");
return 1;
}
if (Options.video_only) {
fprintf(stderr, "ERROR: --video option incompatible with multi-track fragments");
return 1;
}
track_id = 0;
}
// open a new file for this fragment
if (output) {
output->Release();
output = NULL;
}
char segment_name[4096];
if (Options.track_filter == 0 || Options.track_filter == track_id) {
AP4_UI64 p[2] = {0,0};
unsigned int params_len = strlen(Options.pattern_params);
for (unsigned int i=0; i<params_len; i++) {
if (Options.pattern_params[i] == 'I') {
p[i] = track_id;
} else if (Options.pattern_params[i] == 'N') {
p[i] = NextFragmentIndex(track_id)+Options.start_number;
}
}
switch (params_len) {
case 1:
sprintf(segment_name, Options.media_segment_name, p[0]);
break;
case 2:
sprintf(segment_name, Options.media_segment_name, p[0], p[1]);
break;
default:
segment_name[0] = 0;
break;
}
result = AP4_FileByteStream::Create(segment_name, AP4_FileByteStream::STREAM_MODE_WRITE, output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open output file (%d)\n", result);
return 1;
}
}
}
// write the atom
if (output && atom->GetType() != AP4_ATOM_TYPE_MFRA) {
atom->Write(*output);
}
delete atom;
}
// cleanup
delete file;
if (input) input->Release();
if (output) output->Release();
return 0;
}
/*----------------------------------------------------------------------
| Mp4ParserOutput_SetSampleDescription
+---------------------------------------------------------------------*/
static BLT_Result
Mp4ParserOutput_SetSampleDescription(Mp4ParserOutput* self,
unsigned int indx)
{
// if we had a decrypter before, release it now
delete self->sample_decrypter;
self->sample_decrypter = NULL;
// check that the audio track is of the right type
AP4_SampleDescription* sample_desc = self->track->GetSampleDescription(indx);
if (sample_desc == NULL) {
ATX_LOG_FINE("no sample description for track");
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
// handle encrypted tracks
BLT_Result result = Mp4ParserOutput_ProcessCryptoInfo(self, sample_desc);
if (BLT_FAILED(result)) return result;
// update the generic part of the stream info
BLT_StreamInfo stream_info;
stream_info.id = self->track->GetId();
stream_info.duration = self->track->GetDurationMs();
stream_info.mask = BLT_STREAM_INFO_MASK_ID |
BLT_STREAM_INFO_MASK_DURATION;
// deal with audio details, if this is an audio track
AP4_AudioSampleDescription* audio_desc = dynamic_cast<AP4_AudioSampleDescription*>(sample_desc);
if (audio_desc) {
ATX_LOG_FINE("sample description is audio");
stream_info.type = BLT_STREAM_TYPE_AUDIO;
stream_info.channel_count = audio_desc->GetChannelCount();
stream_info.sample_rate = audio_desc->GetSampleRate();
stream_info.mask |= BLT_STREAM_INFO_MASK_TYPE |
BLT_STREAM_INFO_MASK_CHANNEL_COUNT |
BLT_STREAM_INFO_MASK_SAMPLE_RATE;
} else if (self == &self->parser->audio_output) {
ATX_LOG_FINE("expected audio sample description, but did not get one");
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
AP4_VideoSampleDescription* video_desc = dynamic_cast<AP4_VideoSampleDescription*>(sample_desc);
if (video_desc) {
ATX_LOG_FINE("sample description is video");
stream_info.type = BLT_STREAM_TYPE_VIDEO;
stream_info.width = video_desc->GetWidth();
stream_info.height = video_desc->GetHeight();
stream_info.mask |= BLT_STREAM_INFO_MASK_TYPE |
BLT_STREAM_INFO_MASK_WIDTH |
BLT_STREAM_INFO_MASK_HEIGHT;
} else if (self == &self->parser->video_output) {
ATX_LOG_FINE("expected video sample descriton, but did not get one");
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
AP4_MpegSampleDescription* mpeg_desc = NULL;
if (sample_desc->GetType() == AP4_SampleDescription::TYPE_MPEG) {
ATX_LOG_FINE("sample description is of type MPEG");
mpeg_desc = dynamic_cast<AP4_MpegSampleDescription*>(sample_desc);
}
if (mpeg_desc) {
stream_info.data_type = mpeg_desc->GetObjectTypeString(mpeg_desc->GetObjectTypeId());
stream_info.average_bitrate = mpeg_desc->GetAvgBitrate();
stream_info.nominal_bitrate = mpeg_desc->GetAvgBitrate();
stream_info.mask |= BLT_STREAM_INFO_MASK_AVERAGE_BITRATE |
BLT_STREAM_INFO_MASK_NOMINAL_BITRATE |
BLT_STREAM_INFO_MASK_DATA_TYPE;
}
// setup the output media type
AP4_DataBuffer decoder_info;
BLT_MediaTypeId media_type_id = BLT_MEDIA_TYPE_ID_NONE;
AP4_UI32 format_or_object_type_id = 0;
if (mpeg_desc) {
decoder_info.SetData(mpeg_desc->GetDecoderInfo().GetData(),
mpeg_desc->GetDecoderInfo().GetDataSize());
media_type_id = self->mp4_es_type_id;
format_or_object_type_id = mpeg_desc->GetObjectTypeId();
} else {
// here we have to be format-specific for the decoder info
stream_info.data_type = AP4_GetFormatName(sample_desc->GetFormat());
stream_info.mask |= BLT_STREAM_INFO_MASK_DATA_TYPE;
format_or_object_type_id = sample_desc->GetFormat();
if (sample_desc->GetFormat() == AP4_SAMPLE_FORMAT_AVC1) {
// look for an 'avcC' atom
AP4_AvccAtom* avcc = static_cast<AP4_AvccAtom*>(sample_desc->GetDetails().GetChild(AP4_ATOM_TYPE_AVCC));
if (avcc) {
// pass the avcc payload as the decoder info
decoder_info.SetData(avcc->GetRawBytes().GetData(),
avcc->GetRawBytes().GetDataSize());
}
} else if (sample_desc->GetFormat() == AP4_SAMPLE_FORMAT_ALAC) {
// look for an 'alac' atom (either top-level or inside a 'wave')
AP4_Atom* alac = sample_desc->GetDetails().GetChild(AP4_SAMPLE_FORMAT_ALAC);
if (alac == NULL) {
AP4_ContainerAtom* wave = dynamic_cast<AP4_ContainerAtom*>(sample_desc->GetDetails().GetChild(AP4_ATOM_TYPE_WAVE));
if (wave) {
alac = wave->GetChild(AP4_SAMPLE_FORMAT_ALAC);
}
}
if (alac) {
// pass the alac payload as the decoder info
AP4_MemoryByteStream* mbs = new AP4_MemoryByteStream((AP4_Size)alac->GetSize());
alac->WriteFields(*mbs);
decoder_info.SetData(mbs->GetData(), mbs->GetDataSize());
mbs->Release();
}
}
media_type_id = self->iso_base_es_type_id;
}
BLT_Mp4MediaType* media_type = NULL;
unsigned int struct_size = decoder_info.GetDataSize()?decoder_info.GetDataSize()-1:0;
if (audio_desc) {
struct_size += sizeof(BLT_Mp4AudioMediaType);
BLT_Mp4AudioMediaType* audio_type = (BLT_Mp4AudioMediaType*)ATX_AllocateZeroMemory(struct_size);;
audio_type->base.stream_type = BLT_MP4_STREAM_TYPE_AUDIO;
audio_type->channel_count = audio_desc->GetChannelCount();
audio_type->sample_rate = audio_desc->GetSampleRate();
audio_type->decoder_info_length = decoder_info.GetDataSize();
if (decoder_info.GetDataSize()) {
ATX_CopyMemory(&audio_type->decoder_info[0], decoder_info.GetData(), decoder_info.GetDataSize());
}
media_type = &audio_type->base;
} else {
struct_size += sizeof(BLT_Mp4VideoMediaType);
BLT_Mp4VideoMediaType* video_type = (BLT_Mp4VideoMediaType*)ATX_AllocateZeroMemory(struct_size);
video_type->base.stream_type = BLT_MP4_STREAM_TYPE_VIDEO;
video_type->width = video_desc->GetWidth();
video_type->height = video_desc->GetHeight();
video_type->decoder_info_length = decoder_info.GetDataSize();
if (decoder_info.GetDataSize()) {
ATX_CopyMemory(&video_type->decoder_info[0], decoder_info.GetData(), decoder_info.GetDataSize());
}
media_type = &video_type->base;
}
media_type->base.id = media_type_id;
media_type->base.extension_size = struct_size-sizeof(BLT_MediaType);
media_type->format_or_object_type_id = format_or_object_type_id;
self->media_type = &media_type->base;
self->sample_description_index = indx;
// final update to the stream info
BLT_Stream_SetInfo(ATX_BASE(self->parser, BLT_BaseMediaNode).context, &stream_info);
// enable the track in the linear reader if we have one
if (self->parser->input.reader) {
self->parser->input.reader->EnableTrack(self->track->GetId());
}
return BLT_SUCCESS;
}
/*----------------------------------------------------------------------
| main
+---------------------------------------------------------------------*/
int
main(int argc, char** argv)
{
if (argc == 1) PrintUsageAndExit();
// parse options
AP4_UI08 encryption_method = 0;
bool encryption_method_is_set = false;
AP4_UI08 padding_scheme = 0;
const char* input_filename = NULL;
const char* output_filename = NULL;
bool show_progress = false;
bool key_is_set = false;
unsigned char key[16];
unsigned char iv[16];
AP4_BlockCipher::CipherMode cipher_mode = AP4_BlockCipher::CBC;
const char* content_type = "";
const char* content_id = "";
const char* rights_issuer_url = "";
AP4_LargeSize plaintext_length = 0;
AP4_DataBuffer textual_headers_buffer;
AP4_TrackPropertyMap textual_headers;
AP4_SetMemory(key, 0, sizeof(key));
AP4_SetMemory(iv, 0, sizeof(iv));
// parse the command line arguments
char* arg;
while ((arg = *++argv)) {
if (!strcmp(arg, "--method")) {
arg = *++argv;
if (!strcmp(arg, "CBC")) {
encryption_method = AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CBC;
encryption_method_is_set = true;
padding_scheme = AP4_OMA_DCF_PADDING_SCHEME_RFC_2630;
cipher_mode = AP4_BlockCipher::CBC;
} else if (!strcmp(arg, "CTR")) {
encryption_method = AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CTR;
encryption_method_is_set = true;
padding_scheme = AP4_OMA_DCF_PADDING_SCHEME_NONE;
cipher_mode = AP4_BlockCipher::CTR;
} else if (!strcmp(arg, "NULL")) {
encryption_method = AP4_OMA_DCF_ENCRYPTION_METHOD_NULL;
encryption_method_is_set = true;
padding_scheme = AP4_OMA_DCF_PADDING_SCHEME_NONE;
} else {
fprintf(stderr, "ERROR: invalid value for --method argument\n");
return 1;
}
} else if (!strcmp(arg, "--show-progress")) {
show_progress = true;
} else if (!strcmp(arg, "--content-type")) {
content_type = *++argv;
if (content_type == NULL) {
fprintf(stderr, "ERROR: missing argument for --content-type option\n");
return 1;
}
} else if (!strcmp(arg, "--content-id")) {
content_id = *++argv;
if (content_type == NULL) {
fprintf(stderr, "ERROR: missing argument for --content-id option\n");
return 1;
}
} else if (!strcmp(arg, "--rights-issuer")) {
rights_issuer_url = *++argv;
if (rights_issuer_url == NULL) {
fprintf(stderr, "ERROR: missing argument for --rights-issuer option\n");
return 1;
}
} else if (!strcmp(arg, "--key")) {
if (!encryption_method_is_set) {
fprintf(stderr, "ERROR: --method argument must appear before --key\n");
return 1;
} else if (encryption_method_is_set == AP4_OMA_DCF_ENCRYPTION_METHOD_NULL) {
fprintf(stderr, "ERROR: --key cannot be used with --method NULL\n");
return 1;
}
arg = *++argv;
if (arg == NULL) {
fprintf(stderr, "ERROR: missing argument for --key option\n");
return 1;
}
char* key_ascii = NULL;
char* iv_ascii = NULL;
if (AP4_FAILED(AP4_SplitArgs(arg, key_ascii, iv_ascii))) {
fprintf(stderr, "ERROR: invalid argument for --key option\n");
return 1;
}
if (AP4_ParseHex(key_ascii, key, 16)) {
fprintf(stderr, "ERROR: invalid hex format for key\n");
}
if (AP4_ParseHex(iv_ascii, iv, 16)) {
fprintf(stderr, "ERROR: invalid hex format for iv\n");
return 1;
}
// check that the key is not already there
if (key_is_set) {
fprintf(stderr, "ERROR: key already set\n");
return 1;
}
key_is_set = true;
} else if (!strcmp(arg, "--textual-header")) {
char* name = NULL;
char* value = NULL;
arg = *++argv;
if (arg == NULL) {
fprintf(stderr, "ERROR: missing argument for --textual-header option\n");
return 1;
}
if (AP4_FAILED(AP4_SplitArgs(arg, name, value))) {
fprintf(stderr, "ERROR: invalid argument for --textual-header option\n");
return 1;
}
// check that the property is not already set
if (textual_headers.GetProperty(0, name)) {
fprintf(stderr, "ERROR: textual header %s already set\n", name);
return 1;
}
// set the property in the map
textual_headers.SetProperty(0, name, value);
} else if (input_filename == NULL) {
input_filename = arg;
} else if (output_filename == NULL) {
output_filename = arg;
} else {
fprintf(stderr, "ERROR: unexpected argument (%s)\n", arg);
return 1;
}
}
// check the arguments
if (!encryption_method_is_set) {
fprintf(stderr, "ERROR: missing --method argument\n");
return 1;
}
if (!key_is_set) {
fprintf(stderr, "ERROR: encryption key not specified\n");
return 1;
}
if (input_filename == NULL) {
fprintf(stderr, "ERROR: missing input filename\n");
return 1;
}
if (output_filename == NULL) {
fprintf(stderr, "ERROR: missing output filename\n");
return 1;
}
(void)show_progress; // avoid warnings
// convert to a textual headers buffer
textual_headers.GetTextualHeaders(0, textual_headers_buffer);
// create the input stream
AP4_Result result;
AP4_ByteStream* input = NULL;
result = AP4_FileByteStream::Create(input_filename, AP4_FileByteStream::STREAM_MODE_READ, input);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input file (%s) %d\n", input_filename, result);
return 1;
}
// get the size of the input
result = input->GetSize(plaintext_length);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot get the size of the input\n");
return 1;
}
// create an encrypting stream for the input
AP4_ByteStream* encrypted_stream;
if (encryption_method == AP4_OMA_DCF_ENCRYPTION_METHOD_NULL) {
encrypted_stream = input;
} else {
result = AP4_EncryptingStream::Create(cipher_mode, *input, iv, 16, key, 16, true, &AP4_DefaultBlockCipherFactory::Instance, encrypted_stream);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to create cipher (%d)\n", result);
return 1;
}
}
// create the output stream
AP4_ByteStream* output = NULL;
result = AP4_FileByteStream::Create(output_filename, AP4_FileByteStream::STREAM_MODE_WRITE, output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open output file (%s) %d\n", output_filename, result);
return 1;
}
// create the file
AP4_File file;
// set the brand
AP4_UI32 compatible_brands[1] = {AP4_OMA_DCF_BRAND_ODCF};
file.SetFileType(AP4_OMA_DCF_BRAND_ODCF, 2, compatible_brands, 1);
// create the odrm atom (force a 64-bit size)
AP4_ContainerAtom* odrm = new AP4_ContainerAtom(AP4_ATOM_TYPE_ODRM, AP4_FULL_ATOM_HEADER_SIZE_64, true, 0, 0);
// create the ohdr atom
AP4_OhdrAtom* ohdr = new AP4_OhdrAtom(encryption_method,
padding_scheme,
plaintext_length,
content_id,
rights_issuer_url,
textual_headers_buffer.GetData(),
textual_headers_buffer.GetDataSize());
// create the odhe atom (the ownership is transfered)
AP4_OdheAtom* odhe = new AP4_OdheAtom(content_type, ohdr);
odrm->AddChild(odhe);
// create the odda atom
AP4_OddaAtom* odda = new AP4_OddaAtom(*encrypted_stream);
odrm->AddChild(odda);
// add the odrm atom to the file (the owndership is transfered)
file.GetTopLevelAtoms().Add(odrm);
// write the file to the output
AP4_FileWriter::Write(file, *output);
// cleanup
input->Release();
output->Release();
return 0;
}
/*----------------------------------------------------------------------
| AP4_TrakAtom::AP4_TrakAtom
+---------------------------------------------------------------------*/
AP4_TrakAtom::AP4_TrakAtom(AP4_SampleTable* sample_table,
AP4_Atom::Type hdlr_type,
const char* hdlr_name,
AP4_UI32 track_id,
AP4_UI32 creation_time,
AP4_UI32 modification_time,
AP4_UI64 track_duration,
AP4_UI32 media_time_scale,
AP4_UI64 media_duration,
AP4_UI16 volume,
const char* language,
AP4_UI32 width,
AP4_UI32 height) :
AP4_ContainerAtom(AP4_ATOM_TYPE_TRAK)
{
AP4_Result result;
// create a tkhd atom
m_TkhdAtom = new AP4_TkhdAtom(creation_time,
modification_time,
track_id,
track_duration,
volume,
width,
height);
// create an edts
// create a mdia atom
AP4_ContainerAtom* mdia = new AP4_ContainerAtom(AP4_ATOM_TYPE_MDIA);
// create a hdlr atom for the mdia atom
AP4_HdlrAtom* hdlr = new AP4_HdlrAtom(hdlr_type, hdlr_name);
// create a minf atom
AP4_ContainerAtom* minf = new AP4_ContainerAtom(AP4_ATOM_TYPE_MINF);
// create a media header atom for minf (vmhd, smhd, hmhd or nmhd)
AP4_Atom* minf_header;
// create a media header atom for minf in case of container type header (gmhd)
AP4_ContainerAtom* minf_header2 = NULL;
switch (hdlr_type) {
case AP4_HANDLER_TYPE_VIDE:
minf_header = new AP4_VmhdAtom(0, 0, 0, 0);
break;
case AP4_HANDLER_TYPE_SOUN:
minf_header = new AP4_SmhdAtom(0);
break;
case AP4_HANDLER_TYPE_QTCHAP:
// Generate needed child atoms
AP4_GminAtom* gmin;
AP4_GmhdTextAtom* gmhdtext;
AP4_HdlrAtom* alis_hdlr;
// build the Generic Media Header
minf_header2 = new AP4_ContainerAtom(AP4_ATOM_TYPE_GMHD);
// Generic Media Information a child of gmhd
gmin = new AP4_GminAtom(64,32768,32768,32768,0);
minf_header2->AddChild(gmin);
// Special Text Description atom is a child of gmhd atom
gmhdtext = new AP4_GmhdTextAtom();
minf_header2->AddChild(gmhdtext);
// build the secondary Data Handler
alis_hdlr = new AP4_HdlrAtom(AP4_HANDLER_TYPE_ALIS, "Bento4 Alis Handler",AP4_HANDLER_CLASS_DHLR, AP4_HANDLER_VENDOR_ID_APPL);
minf->AddChild(alis_hdlr);
// replace the main handler with a text Media Handler
hdlr = new AP4_HdlrAtom(AP4_HANDLER_TYPE_TEXT, "Bento4 Text Handler", AP4_HANDLER_CLASS_MHLR, AP4_HANDLER_VENDOR_ID_APP2);
// Chapter tracks should be disabled, they aren't played, only referenced
m_TkhdAtom->SetEnabled(0);
break;
default:
minf_header = new AP4_NmhdAtom();
break;
}
// create a dinf atom for minf
AP4_ContainerAtom* dinf = new AP4_ContainerAtom(AP4_ATOM_TYPE_DINF);
// create a url atom as a ref for dref
AP4_Atom* url;
// Chapter tracks use an alis reference atom
if (hdlr_type == AP4_HANDLER_TYPE_QTCHAP){
url = new AP4_AlisAtom(); }
else { url = new AP4_UrlAtom(); }// local ref
// create a dref atom for dinf
AP4_DrefAtom* dref = new AP4_DrefAtom(&url, 1);
// create a stbl atom for minf
AP4_ContainerAtom* stbl;
result = sample_table->GenerateStblAtom(stbl);
if (AP4_FAILED(result)) stbl = NULL;
// populate the dinf atom
dinf->AddChild(dref);
// populate the minf atom
// use the minf_header2 if it's been assigned
if (minf_header2 != NULL) {
minf->AddChild(minf_header2,0);
} else { minf->AddChild(minf_header); }
minf->AddChild(dinf);
if (stbl) minf->AddChild(stbl);
// create a mdhd atom for the mdia atom
m_MdhdAtom = new AP4_MdhdAtom(creation_time,
modification_time,
media_time_scale,
media_duration,
language);
// populate the mdia atom
mdia->AddChild(m_MdhdAtom);
mdia->AddChild(hdlr);
mdia->AddChild(minf);
// attach the children
AddChild(m_TkhdAtom);
AddChild(mdia);
}
/*----------------------------------------------------------------------
| AP4_MarlinIpmpDecryptingProcessor:CreateTrackHandler
+---------------------------------------------------------------------*/
AP4_Processor::TrackHandler*
AP4_MarlinIpmpDecryptingProcessor::CreateTrackHandler(AP4_TrakAtom* trak)
{
// look for this track in the list of entries
AP4_MarlinIpmpParser::SinfEntry* sinf_entry = NULL;
for (AP4_List<AP4_MarlinIpmpParser::SinfEntry>::Item* sinf_entry_item = m_SinfEntries.FirstItem();
sinf_entry_item;
sinf_entry_item = sinf_entry_item->GetNext()) {
sinf_entry = sinf_entry_item->GetData();
if (sinf_entry->m_TrackId == trak->GetId()) {
break; // match
} else {
sinf_entry = NULL; // no match
}
}
if (sinf_entry == NULL) return NULL; // no matching entry
AP4_ContainerAtom* sinf = sinf_entry->m_Sinf;
// check the scheme
bool use_group_key;
AP4_SchmAtom* schm = AP4_DYNAMIC_CAST(AP4_SchmAtom, sinf->GetChild(AP4_ATOM_TYPE_SCHM));
if (schm == NULL) return NULL; // no schm
if (schm->GetSchemeType() == AP4_PROTECTION_SCHEME_TYPE_MARLIN_ACBC &&
schm->GetSchemeVersion() == 0x0100) {
use_group_key = false;
} else if (schm->GetSchemeType() == AP4_PROTECTION_SCHEME_TYPE_MARLIN_ACGK &&
schm->GetSchemeVersion() == 0x0100) {
use_group_key = true;
} else {
// unsupported scheme
return NULL;
}
// find the key
const AP4_DataBuffer* key = NULL;
AP4_DataBuffer unwrapped_key;
if (use_group_key) {
const AP4_DataBuffer* group_key = m_KeyMap.GetKey(0);
if (group_key == NULL) return NULL; // no group key
AP4_ContainerAtom* schi = AP4_DYNAMIC_CAST(AP4_ContainerAtom, sinf->GetChild(AP4_ATOM_TYPE_SCHI));
if (schi == NULL) return NULL; // no schi
AP4_Atom* gkey = schi->GetChild(AP4_ATOM_TYPE_GKEY);
if (gkey == NULL) return NULL; // no gkey
AP4_MemoryByteStream* gkey_data = new AP4_MemoryByteStream();
gkey->WriteFields(*gkey_data);
AP4_AesKeyUnwrap(group_key->GetData(), gkey_data->GetData(), gkey_data->GetDataSize(), unwrapped_key);
key = &unwrapped_key;
gkey_data->Release();
} else {
key = m_KeyMap.GetKey(sinf_entry->m_TrackId);
}
if (key == NULL) return NULL;
// create the decrypter
AP4_MarlinIpmpTrackDecrypter* decrypter = NULL;
AP4_Result result = AP4_MarlinIpmpTrackDecrypter::Create(*m_BlockCipherFactory,
key->GetData(),
key->GetDataSize(),
decrypter);
if (AP4_FAILED(result)) return NULL;
return decrypter;
}
/*----------------------------------------------------------------------
| AP4_Processor::Process
+---------------------------------------------------------------------*/
AP4_Result
AP4_Processor::Process(AP4_ByteStream& input,
AP4_ByteStream& output,
ProgressListener* listener,
AP4_AtomFactory& atom_factory)
{
// read all atoms.
// keep all atoms except [mdat]
// keep a ref to [moov]
// put [moof] atoms in a separate list
AP4_AtomParent top_level;
AP4_MoovAtom* moov = NULL;
AP4_ContainerAtom* mfra = NULL;
AP4_List<AP4_MoofLocator> moofs;
AP4_UI64 stream_offset = 0;
for (AP4_Atom* atom = NULL;
AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(input, atom));
input.Tell(stream_offset)) {
if (atom->GetType() == AP4_ATOM_TYPE_MDAT) {
continue;
} else if (atom->GetType() == AP4_ATOM_TYPE_MOOV) {
moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, atom);
} else if (atom->GetType() == AP4_ATOM_TYPE_MOOF) {
AP4_ContainerAtom* moof = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
if (moof) {
moofs.Add(new AP4_MoofLocator(moof, stream_offset));
}
continue;
} else if (atom->GetType() == AP4_ATOM_TYPE_MFRA) {
mfra = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
continue;
}
top_level.AddChild(atom);
}
// initialize the processor
AP4_Result result = Initialize(top_level, input);
if (AP4_FAILED(result)) return result;
// process the tracks if we have a moov atom
AP4_Array<AP4_SampleLocator> locators;
AP4_Cardinal track_count = 0;
AP4_List<AP4_TrakAtom>* trak_atoms = NULL;
AP4_LargeSize mdat_payload_size = 0;
TrackHandler** handlers = NULL;
AP4_SampleCursor* cursors = NULL;
if (moov) {
// build an array of track sample locators
trak_atoms = &moov->GetTrakAtoms();
track_count = trak_atoms->ItemCount();
cursors = new AP4_SampleCursor[track_count];
handlers = new TrackHandler*[track_count];
for (AP4_Ordinal i=0; i<track_count; i++) {
handlers[i] = NULL;
}
unsigned int index = 0;
for (AP4_List<AP4_TrakAtom>::Item* item = trak_atoms->FirstItem(); item; item=item->GetNext()) {
AP4_TrakAtom* trak = item->GetData();
// find the stsd atom
AP4_ContainerAtom* stbl = AP4_DYNAMIC_CAST(AP4_ContainerAtom, trak->FindChild("mdia/minf/stbl"));
if (stbl == NULL) continue;
// see if there's an external data source for this track
AP4_ByteStream* trak_data_stream = &input;
for (AP4_List<ExternalTrackData>::Item* ditem = m_ExternalTrackData.FirstItem(); ditem; ditem=ditem->GetNext()) {
ExternalTrackData* tdata = ditem->GetData();
if (tdata->m_TrackId == trak->GetId()) {
trak_data_stream = tdata->m_MediaData;
break;
}
}
// create the track handler
handlers[index] = CreateTrackHandler(trak);
cursors[index].m_Locator.m_TrakIndex = index;
cursors[index].m_Locator.m_SampleTable = new AP4_AtomSampleTable(stbl, *trak_data_stream);
cursors[index].m_Locator.m_SampleIndex = 0;
cursors[index].m_Locator.m_ChunkIndex = 0;
if (cursors[index].m_Locator.m_SampleTable->GetSampleCount()) {
cursors[index].m_Locator.m_SampleTable->GetSample(0, cursors[index].m_Locator.m_Sample);
} else {
cursors[index].m_EndReached = true;
}
index++;
}
// figure out the layout of the chunks
for (;;) {
// see which is the next sample to write
AP4_UI64 min_offset = (AP4_UI64)(-1);
int cursor = -1;
for (unsigned int i=0; i<track_count; i++) {
if (!cursors[i].m_EndReached &&
cursors[i].m_Locator.m_Sample.GetOffset() <= min_offset) {
min_offset = cursors[i].m_Locator.m_Sample.GetOffset();
cursor = i;
}
}
// stop if all cursors are exhausted
if (cursor == -1) break;
// append this locator to the layout list
AP4_SampleLocator& locator = cursors[cursor].m_Locator;
locators.Append(locator);
// move the cursor to the next sample
locator.m_SampleIndex++;
if (locator.m_SampleIndex == locator.m_SampleTable->GetSampleCount()) {
// mark this track as completed
cursors[cursor].m_EndReached = true;
} else {
// get the next sample info
locator.m_SampleTable->GetSample(locator.m_SampleIndex, locator.m_Sample);
AP4_Ordinal skip, sdesc;
locator.m_SampleTable->GetChunkForSample(locator.m_SampleIndex,
locator.m_ChunkIndex,
skip, sdesc);
}
}
// update the stbl atoms and compute the mdat size
int current_track = -1;
int current_chunk = -1;
AP4_Position current_chunk_offset = 0;
AP4_Size current_chunk_size = 0;
for (AP4_Ordinal i=0; i<locators.ItemCount(); i++) {
AP4_SampleLocator& locator = locators[i];
if ((int)locator.m_TrakIndex != current_track ||
(int)locator.m_ChunkIndex != current_chunk) {
// start a new chunk for this track
current_chunk_offset += current_chunk_size;
current_chunk_size = 0;
current_track = locator.m_TrakIndex;
current_chunk = locator.m_ChunkIndex;
locator.m_SampleTable->SetChunkOffset(locator.m_ChunkIndex, current_chunk_offset);
}
AP4_Size sample_size;
TrackHandler* handler = handlers[locator.m_TrakIndex];
if (handler) {
sample_size = handler->GetProcessedSampleSize(locator.m_Sample);
locator.m_SampleTable->SetSampleSize(locator.m_SampleIndex, sample_size);
} else {
sample_size = locator.m_Sample.GetSize();
}
current_chunk_size += sample_size;
mdat_payload_size += sample_size;
}
// process the tracks (ex: sample descriptions processing)
for (AP4_Ordinal i=0; i<track_count; i++) {
TrackHandler* handler = handlers[i];
if (handler) handler->ProcessTrack();
}
}
// finalize the processor
Finalize(top_level);
// calculate the size of all atoms combined
AP4_UI64 atoms_size = 0;
top_level.GetChildren().Apply(AP4_AtomSizeAdder(atoms_size));
// see if we need a 64-bit or 32-bit mdat
AP4_Size mdat_header_size = AP4_ATOM_HEADER_SIZE;
if (mdat_payload_size+mdat_header_size > 0xFFFFFFFF) {
// we need a 64-bit size
mdat_header_size += 8;
}
// adjust the chunk offsets
for (AP4_Ordinal i=0; i<track_count; i++) {
AP4_TrakAtom* trak;
trak_atoms->Get(i, trak);
trak->AdjustChunkOffsets(atoms_size+mdat_header_size);
}
// write all atoms
top_level.GetChildren().Apply(AP4_AtomListWriter(output));
// write mdat header
if (mdat_payload_size) {
if (mdat_header_size == AP4_ATOM_HEADER_SIZE) {
// 32-bit size
output.WriteUI32((AP4_UI32)(mdat_header_size+mdat_payload_size));
output.WriteUI32(AP4_ATOM_TYPE_MDAT);
} else {
// 64-bit size
output.WriteUI32(1);
output.WriteUI32(AP4_ATOM_TYPE_MDAT);
output.WriteUI64(mdat_header_size+mdat_payload_size);
}
}
#if defined(AP4_DEBUG)
AP4_Position before;
output.Tell(before);
#endif
// write the samples
if (moov) {
AP4_Sample sample;
AP4_DataBuffer data_in;
AP4_DataBuffer data_out;
for (unsigned int i=0; i<locators.ItemCount(); i++) {
AP4_SampleLocator& locator = locators[i];
locator.m_Sample.ReadData(data_in);
TrackHandler* handler = handlers[locator.m_TrakIndex];
if (handler) {
result = handler->ProcessSample(data_in, data_out);
if (AP4_FAILED(result)) return result;
output.Write(data_out.GetData(), data_out.GetDataSize());
} else {
output.Write(data_in.GetData(), data_in.GetDataSize());
}
// notify the progress listener
if (listener) {
listener->OnProgress(i+1, locators.ItemCount());
}
}
// cleanup
for (AP4_Ordinal i=0; i<track_count; i++) {
delete cursors[i].m_Locator.m_SampleTable;
delete handlers[i];
}
delete[] cursors;
delete[] handlers;
}
#if defined(AP4_DEBUG)
AP4_Position after;
output.Tell(after);
AP4_ASSERT(after-before == mdat_payload_size);
#endif
// process the fragments, if any
result = ProcessFragments(moov, moofs, mfra, input, output);
if (AP4_FAILED(result)) return result;
// write the mfra atom at the end if we have one
if (mfra) {
mfra->Write(output);
}
// cleanup
moofs.DeleteReferences();
delete mfra;
return AP4_SUCCESS;
}
