void CMVDAtom::OnProcessMetaData()
{
Read(&UncompressedSize);
if (UncompressedSize > 0) {
BufferSize = getBytesRemaining();
Buffer = (uint8 *)(malloc(BufferSize));
Read(Buffer,BufferSize);
}
}
WrappedMemoryInputStream::SizeType WrappedMemoryInputStream::read(
void* buffer, SizeType bytesToRead) {
DCHECK(bytesToRead >= 0);
SizeType num = std::min(bytesToRead, getBytesRemaining());
std::memcpy(buffer, static_cast<const u8*>(m_data) + m_currentPosition,
static_cast<size_t>(num));
m_currentPosition += num;
return num;
}
void FTYPAtom::OnProcessMetaData()
{
// ftyp is really an mp4 thing, but some mov encoders are adding it anyway.
// but a mov file with an ftyp should define a brand of qt (I think)
Read(&major_brand);
Read(&minor_version);
total_brands = getBytesRemaining() / sizeof(uint32);
if (total_brands > 32) {
total_brands = 32; // restrict to 32
}
for (uint32 i=0;i<total_brands;i++) {
Read(&compatable_brands[i]);
}
}
void STSDAtom::ReadVideoDescription()
{
uint64 descBytesLeft;
// read in Video Sample Data
VideoDescriptionV0 *aVideoDescription;
aVideoDescription = new VideoDescriptionV0;
Read(&aVideoDescription->basefields.Size);
Read(&aVideoDescription->basefields.DataFormat);
Read(aVideoDescription->basefields.Reserved,6);
Read(&aVideoDescription->basefields.DataReference);
Read(&aVideoDescription->desc.Version);
Read(&aVideoDescription->desc.Revision);
Read(&aVideoDescription->desc.Vendor);
Read(&aVideoDescription->desc.TemporaralQuality);
Read(&aVideoDescription->desc.SpacialQuality);
Read(&aVideoDescription->desc.Width);
Read(&aVideoDescription->desc.Height);
Read(&aVideoDescription->desc.HorizontalResolution);
Read(&aVideoDescription->desc.VerticalResolution);
Read(&aVideoDescription->desc.DataSize);
// FrameCount is actually No of Frames per Sample which is usually 1
Read(&aVideoDescription->desc.FrameCount);
Read(aVideoDescription->desc.CompressorName,32);
Read(&aVideoDescription->desc.Depth);
Read(&aVideoDescription->desc.ColourTableID);
aVideoDescription->VOLSize = 0;
aVideoDescription->theVOL = NULL;
theVideoDescArray[0] = aVideoDescription;
descBytesLeft = getBytesRemaining();
// May be a VOL
// If not then seek back to where we are as it may be a complete new video description
if (descBytesLeft > 0) {
off_t pos = theStream->Position();
// More extended atoms
AtomBase *aAtomBase = getAtom(theStream);
aAtomBase->OnProcessMetaData();
printf("%s\n",aAtomBase->getAtomName());
if (dynamic_cast<ESDSAtom *>(aAtomBase)) {
// ESDS atom good
aVideoDescription->VOLSize = aAtomBase->getDataSize();
aVideoDescription->theVOL = (uint8 *)(malloc(aVideoDescription->VOLSize));
memcpy(aVideoDescription->theVOL,dynamic_cast<ESDSAtom *>(aAtomBase)->getVOL(),aVideoDescription->VOLSize);
} else {
// Seek Back
theStream->Seek(pos,SEEK_SET);
}
delete aAtomBase;
}
PRINT(("Size:Format=%ld:%ld %Ld\n",aVideoDescription->basefields.Size,aVideoDescription->basefields.DataFormat,getBytesRemaining()));
}
void STSDAtom::ReadSoundDescription()
{
uint64 descBytesLeft;
SoundDescriptionV1 *aSoundDescriptionV1;
aSoundDescriptionV1 = new SoundDescriptionV1;
Read(&aSoundDescriptionV1->basefields.Size);
Read(&aSoundDescriptionV1->basefields.DataFormat);
Read(aSoundDescriptionV1->basefields.Reserved,6);
Read(&aSoundDescriptionV1->basefields.DataReference);
aSoundDescriptionV1->VOLSize = 0;
aSoundDescriptionV1->theVOL = NULL;
// Read in Audio Sample Data
// We place into a V1 description even though it might be a V0 or earlier
Read(&aSoundDescriptionV1->desc.Version);
Read(&aSoundDescriptionV1->desc.Revision);
Read(&aSoundDescriptionV1->desc.Vendor);
Read(&aSoundDescriptionV1->desc.NoOfChannels);
Read(&aSoundDescriptionV1->desc.SampleSize);
Read(&aSoundDescriptionV1->desc.CompressionID);
Read(&aSoundDescriptionV1->desc.PacketSize);
Read(&aSoundDescriptionV1->desc.SampleRate);
if ((aSoundDescriptionV1->desc.Version == 1) && (aSoundDescriptionV1->basefields.DataFormat != AUDIO_IMA4)) {
Read(&(aSoundDescriptionV1->samplesPerPacket));
Read(&(aSoundDescriptionV1->bytesPerPacket));
Read(&(aSoundDescriptionV1->bytesPerFrame));
Read(&(aSoundDescriptionV1->bytesPerSample));
} else {
// Calculate?
if (aSoundDescriptionV1->basefields.DataFormat == AUDIO_IMA4) {
aSoundDescriptionV1->samplesPerPacket = 64;
aSoundDescriptionV1->bytesPerFrame = aSoundDescriptionV1->desc.NoOfChannels * 34;
aSoundDescriptionV1->bytesPerSample = aSoundDescriptionV1->desc.SampleSize / 8;
aSoundDescriptionV1->bytesPerPacket = 64 * aSoundDescriptionV1->bytesPerFrame;
} else {
aSoundDescriptionV1->bytesPerSample = aSoundDescriptionV1->desc.SampleSize / 8;
aSoundDescriptionV1->bytesPerFrame = aSoundDescriptionV1->desc.NoOfChannels * aSoundDescriptionV1->bytesPerSample;
aSoundDescriptionV1->bytesPerPacket = aSoundDescriptionV1->desc.PacketSize;
aSoundDescriptionV1->samplesPerPacket = aSoundDescriptionV1->desc.PacketSize / aSoundDescriptionV1->bytesPerFrame;
}
}
// 0 means we dont have one
aSoundDescriptionV1->theWaveFormat.format_tag = 0;
descBytesLeft = getBytesRemaining();
while (descBytesLeft > 0) {
// More extended atoms
AtomBase *aAtomBase = getAtom(theStream);
aAtomBase->OnProcessMetaData();
printf("%s\n",aAtomBase->getAtomName());
if (dynamic_cast<WAVEAtom *>(aAtomBase)) {
// WAVE atom
aSoundDescriptionV1->theWaveFormat = dynamic_cast<WAVEAtom *>(aAtomBase)->getWaveFormat();
}
if (dynamic_cast<ESDSAtom *>(aAtomBase)) {
// ESDS atom good
aSoundDescriptionV1->VOLSize = aAtomBase->getDataSize();
aSoundDescriptionV1->theVOL = (uint8 *)(malloc(aSoundDescriptionV1->VOLSize));
memcpy(aSoundDescriptionV1->theVOL,dynamic_cast<ESDSAtom *>(aAtomBase)->getVOL(),aSoundDescriptionV1->VOLSize);
}
if ((aAtomBase->getAtomSize() > 0) && (descBytesLeft >= aAtomBase->getAtomSize())) {
descBytesLeft = descBytesLeft - aAtomBase->getAtomSize();
} else {
DEBUGGER("Invalid Atom found when reading Sound Description\n");
descBytesLeft = 0;
}
delete aAtomBase;
}
theAudioDescArray[0] = aSoundDescriptionV1;
PRINT(("Size:Format=%ld:%ld %Ld\n",aSoundDescriptionV1->basefields.Size,aSoundDescriptionV1->basefields.DataFormat,descBytesLeft));
}
void ESDSAtom::OnProcessMetaData()
{
theVOL = (uint8 *)(malloc(getBytesRemaining()));
Read(theVOL,getBytesRemaining());
}
