ARTPAssembler::AssemblyStatus AH263Assembler::addPacket(
const sp<ARTPSource> &source) {
List<sp<ABuffer> > *queue = source->queue();
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
if (mNextExpectedSeqNoValid) {
List<sp<ABuffer> >::iterator it = queue->begin();
while (it != queue->end()) {
if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) {
break;
}
it = queue->erase(it);
}
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
}
sp<ABuffer> buffer = *queue->begin();
if (!mNextExpectedSeqNoValid) {
mNextExpectedSeqNoValid = true;
mNextExpectedSeqNo = (uint32_t)buffer->int32Data();
} else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) {
#if VERBOSE
LOG(VERBOSE) << "Not the sequence number I expected";
#endif
return WRONG_SEQUENCE_NUMBER;
}
uint32_t rtpTime;
CHECK(buffer->meta()->findInt32("rtp-time", (int32_t *)&rtpTime));
if (mPackets.size() > 0 && rtpTime != mAccessUnitRTPTime) {
submitAccessUnit();
}
mAccessUnitRTPTime = rtpTime;
// hexdump(buffer->data(), buffer->size());
if (buffer->size() < 2) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return MALFORMED_PACKET;
}
unsigned payloadHeader = U16_AT(buffer->data());
unsigned P = (payloadHeader >> 10) & 1;
unsigned V = (payloadHeader >> 9) & 1;
unsigned PLEN = (payloadHeader >> 3) & 0x3f;
unsigned PEBIT = payloadHeader & 7;
// V=0
if (V != 0u) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
ALOGW("Packet discarded due to VRC (V != 0)");
return MALFORMED_PACKET;
}
// PLEN=0
if (PLEN != 0u) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
ALOGW("Packet discarded (PLEN != 0)");
return MALFORMED_PACKET;
}
// PEBIT=0
if (PEBIT != 0u) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
ALOGW("Packet discarded (PEBIT != 0)");
return MALFORMED_PACKET;
}
size_t skip = V + PLEN + (P ? 0 : 2);
buffer->setRange(buffer->offset() + skip, buffer->size() - skip);
if (P) {
buffer->data()[0] = 0x00;
buffer->data()[1] = 0x00;
}
mPackets.push_back(buffer);
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return OK;
}
/**
* UTF16toUTF8: converts UTF-16 (host byte order) to UTF-8
*
* @param src UTF-16 bytes sequence, aligned on a 16-bits boundary
* @param len number of uint16_t to convert
*/
static char *
UTF16toUTF8( const uint16_t *in, size_t len, size_t *newlen )
{
char *res, *out;
/* allocate memory */
out = res = (char *)malloc( 3 * len );
if( res == NULL )
return NULL;
while( len > 0 )
{
uint32_t uv = *in;
in++;
len--;
if( uv < 0x80 )
{
*out++ = uv;
continue;
}
if( uv < 0x800 )
{
*out++ = (( uv >> 6) | 0xc0);
*out++ = (( uv & 0x3f) | 0x80);
continue;
}
if( (uv >= 0xd800) && (uv < 0xdbff) )
{ /* surrogates */
uint16_t low = U16_AT( in );
in++;
len--;
if( (low < 0xdc00) || (low >= 0xdfff) )
{
*out++ = '?'; /* Malformed surrogate */
continue;
}
else
uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
}
if( uv < 0x10000 )
{
*out++ = (( uv >> 12) | 0xe0);
*out++ = (((uv >> 6) & 0x3f) | 0x80);
*out++ = (( uv & 0x3f) | 0x80);
continue;
}
static void DAT12Decode( void *outp, const uint8_t *in, unsigned samples )
{
int32_t *out = outp;
while( samples >= 2 )
{
*(out++) = dat12tos16(U16_AT(in) >> 4);
*(out++) = dat12tos16(U16_AT(in + 1) & ~0xF000);
in += 3;
samples -= 2;
}
if( samples )
*(out++) = dat12tos16(U16_AT(in) >> 4);
}
static void S20BDecode( void *outp, const uint8_t *in, unsigned samples )
{
int32_t *out = outp;
while( samples >= 2 )
{
uint32_t dw = U32_AT(in);
in += 4;
*(out++) = dw & ~0xFFF;
*(out++) = (dw << 20) | (*in << 12);
in++;
samples -= 2;
}
/* No U32_AT() for the last odd sample: avoid off-by-one overflow! */
if( samples )
*(out++) = (U16_AT(in) << 16) | ((in[2] & 0xF0) << 8);
}
size_t AH263Assembler::getOffsetOfHeader(const sp<ABuffer> buffer) {
//the final right offset should be 0 or 2, it is
//initialized to 1 for checking whether errors happen
size_t offset = 1;
if (buffer->size() < 2) {
ALOGW("Packet size is less than 2 bytes");
return offset;
}
unsigned payloadHeader = U16_AT(buffer->data());
unsigned P = (payloadHeader >> 10) & 1;
unsigned V = (payloadHeader >> 9) & 1;
unsigned PLEN = (payloadHeader >> 3) & 0x3f;
unsigned PEBIT = payloadHeader & 7;
// V=0
if (V != 0u) {
ALOGW("Packet discarded due to VRC (V != 0)");
return offset;
}
// PLEN=0
if (PLEN != 0u) {
ALOGW("Packet discarded (PLEN != 0)");
return offset;
}
// PEBIT=0
if (PEBIT != 0u) {
ALOGW("Packet discarded (PEBIT != 0)");
return offset;
}
offset = V + PLEN + (P ? 0 : 2);
return offset;
}
bool ID3::parseV2(const sp<DataSource> &source) {
struct id3_header {
char id[3];
uint8_t version_major;
uint8_t version_minor;
uint8_t flags;
uint8_t enc_size[4];
};
id3_header header;
if (source->readAt(
0, &header, sizeof(header)) != (ssize_t)sizeof(header)) {
return false;
}
if (memcmp(header.id, "ID3", 3)) {
return false;
}
if (header.version_major == 0xff || header.version_minor == 0xff) {
return false;
}
if (header.version_major == 2) {
if (header.flags & 0x3f) {
// We only support the 2 high bits, if any of the lower bits are
// set, we cannot guarantee to understand the tag format.
return false;
}
if (header.flags & 0x40) {
// No compression scheme has been decided yet, ignore the
// tag if compression is indicated.
return false;
}
} else if (header.version_major == 3) {
if (header.flags & 0x1f) {
// We only support the 3 high bits, if any of the lower bits are
// set, we cannot guarantee to understand the tag format.
return false;
}
} else if (header.version_major == 4) {
if (header.flags & 0x0f) {
// The lower 4 bits are undefined in this spec.
return false;
}
} else {
return false;
}
size_t size;
if (!ParseSyncsafeInteger(header.enc_size, &size)) {
return false;
}
if (size > kMaxMetadataSize) {
ALOGE("skipping huge ID3 metadata of size %d", size);
return false;
}
mData = (uint8_t *)malloc(size);
if (mData == NULL) {
return false;
}
mSize = size;
mRawSize = mSize + sizeof(header);
if (source->readAt(sizeof(header), mData, mSize) != (ssize_t)mSize) {
free(mData);
mData = NULL;
return false;
}
if (header.version_major == 4) {
void *copy = malloc(size);
memcpy(copy, mData, size);
bool success = removeUnsynchronizationV2_4(false /* iTunesHack */);
if (!success) {
memcpy(mData, copy, size);
mSize = size;
success = removeUnsynchronizationV2_4(true /* iTunesHack */);
if (success) {
ALOGV("Had to apply the iTunes hack to parse this ID3 tag");
}
}
free(copy);
copy = NULL;
if (!success) {
free(mData);
mData = NULL;
return false;
}
} else if (header.flags & 0x80) {
ALOGV("removing unsynchronization");
removeUnsynchronization();
}
mFirstFrameOffset = 0;
if (header.version_major == 3 && (header.flags & 0x40)) {
// Version 2.3 has an optional extended header.
if (mSize < 4) {
free(mData);
mData = NULL;
return false;
}
size_t extendedHeaderSize = U32_AT(&mData[0]) + 4;
if (extendedHeaderSize > mSize) {
free(mData);
mData = NULL;
return false;
}
mFirstFrameOffset = extendedHeaderSize;
uint16_t extendedFlags = 0;
if (extendedHeaderSize >= 6) {
extendedFlags = U16_AT(&mData[4]);
if (extendedHeaderSize >= 10) {
size_t paddingSize = U32_AT(&mData[6]);
if (mFirstFrameOffset + paddingSize > mSize) {
free(mData);
mData = NULL;
return false;
}
mSize -= paddingSize;
}
if (extendedFlags & 0x8000) {
ALOGV("have crc");
}
}
} else if (header.version_major == 4 && (header.flags & 0x40)) {
// Version 2.4 has an optional extended header, that's different
// from Version 2.3's...
if (mSize < 4) {
free(mData);
mData = NULL;
return false;
}
size_t ext_size;
if (!ParseSyncsafeInteger(mData, &ext_size)) {
free(mData);
mData = NULL;
return false;
}
if (ext_size < 6 || ext_size > mSize) {
free(mData);
mData = NULL;
return false;
}
mFirstFrameOffset = ext_size;
}
if (header.version_major == 2) {
mVersion = ID3_V2_2;
} else if (header.version_major == 3) {
mVersion = ID3_V2_3;
} else {
CHECK_EQ(header.version_major, 4);
mVersion = ID3_V2_4;
}
return true;
}
ARTPAssembler::AssemblyStatus AH263Assembler::addPacket(
const sp<ARTPSource> &source) {
List<sp<ABuffer> > *queue = source->queue();
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
if (mNextExpectedSeqNoValid) {
List<sp<ABuffer> >::iterator it = queue->begin();
while (it != queue->end()) {
if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) {
break;
}
it = queue->erase(it);
}
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
}
sp<ABuffer> buffer = *queue->begin();
if (!mNextExpectedSeqNoValid) {
mNextExpectedSeqNoValid = true;
mNextExpectedSeqNo = (uint32_t)buffer->int32Data();
} else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) {
#if VERBOSE
LOG(VERBOSE) << "Not the sequence number I expected";
#endif
return WRONG_SEQUENCE_NUMBER;
}
uint32_t rtpTime;
if (!buffer->meta()->findInt32("rtp-time", (int32_t *)&rtpTime)) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
LOGW("Cannot find rtp-time. Malformed packet.");
return MALFORMED_PACKET;
}
if (mPackets.size() > 0 && rtpTime != mAccessUnitRTPTime) {
if (!submitAccessUnit()) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
LOGW("Cannot find rtp-time. Malformed packet.");
return MALFORMED_PACKET;
}
}
mAccessUnitRTPTime = rtpTime;
// hexdump(buffer->data(), buffer->size());
if (buffer->size() < 2) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return MALFORMED_PACKET;
}
// RFC 4629, Sec. 5.1 General H.263+ Payload Header.
// The H.263+ payload header is structured as follows:
// 0 1
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | RR |P|V| PLEN |PEBIT|
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// RR: 5 bits
// Reserved bits. It SHALL be zero and MUST be ignored by receivers.
// P: 1 bit
// Indicates the picture start or a picture segment (GOB/Slice) start or
// a video sequence end (EOS or EOSBS). Two bytes of zero bits then have
// to be prefixed to the payload of such a packet to compose a complete
// picture/GOB/slice/EOS/EOSBS start code. This bit allows the omission
// of the two first bytes of the start code, thus improving the
// compression ratio.
// V: 1 bit
// Indicates the presence of an 8-bit field containing information for
// Video Redundancy Coding (VRC), which follows immediately after the
// initial 16 bits of the payload header.
// PLEN: 6 bits
// Length, in bytes, of the extra picture header. If no extra picture
// header is attached, PLEN is 0. If PLEN>0, the extra picture header is
// attached immediately following the rest of the payload header. Note
// that the length reflects the omission of the first two bytes of the
// picture start code (PSC).
// PEBIT: 3 bits
// Indicates the number of bits that shall be ignored in the last byte
// of the picture header. If PLEN is not zero, the ignored bits shall be
// the least significant bits of the byte. If PLEN is zero, then PEBIT
// shall also be zero.
unsigned payloadHeader = U16_AT(buffer->data());
unsigned P = (payloadHeader >> 10) & 1;
unsigned V = (payloadHeader >> 9) & 1;
unsigned PLEN = (payloadHeader >> 3) & 0x3f;
unsigned PEBIT = payloadHeader & 7;
// V = 0
// We do not support VRC header extension for now, so just discard it if
// present.
if (V != 0u) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
LOGW("Packet discarded due to VRC (V != 0)");
return MALFORMED_PACKET;
}
// If PLEN is zero, then PEBIT shall also be zero.
if (PLEN == 0u && PEBIT != 0u) {
queue->erase(queue->begin());
++mNextExpectedSeqNo;
LOGW("Packet discarded (PEBIT != 0)");
return MALFORMED_PACKET;
}
size_t skip = PLEN + (P ? 0: 2);
buffer->setRange(buffer->offset() + skip, buffer->size() - skip);
if (P) {
buffer->data()[0] = 0x00;
buffer->data()[1] = 0x00;
}
mPackets.push_back(buffer);
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return OK;
}
char *stream_ReadLine( stream_t *s )
{
stream_priv_t *priv = (stream_priv_t *)s;
char *p_line = NULL;
int i_line = 0, i_read = 0;
/* Let's fail quickly if this is a readdir access */
if( s->pf_read == NULL )
return NULL;
for( ;; )
{
char *psz_eol;
const uint8_t *p_data;
int i_data;
int64_t i_pos;
/* Probe new data */
i_data = stream_Peek( s, &p_data, STREAM_PROBE_LINE );
if( i_data <= 0 ) break; /* No more data */
/* BOM detection */
i_pos = stream_Tell( s );
if( i_pos == 0 && i_data >= 2 )
{
const char *psz_encoding = NULL;
if( !memcmp( p_data, "\xFF\xFE", 2 ) )
{
psz_encoding = "UTF-16LE";
priv->text.little_endian = true;
}
else if( !memcmp( p_data, "\xFE\xFF", 2 ) )
{
psz_encoding = "UTF-16BE";
}
/* Open the converter if we need it */
if( psz_encoding != NULL )
{
msg_Dbg( s, "UTF-16 BOM detected" );
priv->text.char_width = 2;
priv->text.conv = vlc_iconv_open( "UTF-8", psz_encoding );
if( priv->text.conv == (vlc_iconv_t)-1 )
msg_Err( s, "iconv_open failed" );
}
}
if( i_data % priv->text.char_width )
{
/* keep i_char_width boundary */
i_data = i_data - ( i_data % priv->text.char_width );
msg_Warn( s, "the read is not i_char_width compatible");
}
if( i_data == 0 )
break;
/* Check if there is an EOL */
if( priv->text.char_width == 1 )
{
/* UTF-8: 0A <LF> */
psz_eol = memchr( p_data, '\n', i_data );
if( psz_eol == NULL )
/* UTF-8: 0D <CR> */
psz_eol = memchr( p_data, '\r', i_data );
}
else
{
const uint8_t *p_last = p_data + i_data - priv->text.char_width;
uint16_t eol = priv->text.little_endian ? 0x0A00 : 0x00A0;
assert( priv->text.char_width == 2 );
psz_eol = NULL;
/* UTF-16: 000A <LF> */
for( const uint8_t *p = p_data; p <= p_last; p += 2 )
{
if( U16_AT( p ) == eol )
{
psz_eol = (char *)p + 1;
break;
}
}
if( psz_eol == NULL )
{ /* UTF-16: 000D <CR> */
eol = priv->text.little_endian ? 0x0D00 : 0x00D0;
for( const uint8_t *p = p_data; p <= p_last; p += 2 )
{
if( U16_AT( p ) == eol )
{
psz_eol = (char *)p + 1;
break;
}
}
}
}
if( psz_eol )
{
i_data = (psz_eol - (char *)p_data) + 1;
p_line = realloc_or_free( p_line,
i_line + i_data + priv->text.char_width ); /* add \0 */
if( !p_line )
goto error;
i_data = stream_Read( s, &p_line[i_line], i_data );
if( i_data <= 0 ) break; /* Hmmm */
i_line += i_data - priv->text.char_width; /* skip \n */;
i_read += i_data;
/* We have our line */
break;
}
/* Read data (+1 for easy \0 append) */
p_line = realloc_or_free( p_line,
i_line + STREAM_PROBE_LINE + priv->text.char_width );
if( !p_line )
goto error;
i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
if( i_data <= 0 ) break; /* Hmmm */
i_line += i_data;
i_read += i_data;
if( i_read >= STREAM_LINE_MAX )
goto error; /* line too long */
}
if( i_read > 0 )
{
memset(p_line + i_line, 0, priv->text.char_width);
i_line += priv->text.char_width; /* the added \0 */
if( priv->text.char_width > 1 )
{
int i_new_line = 0;
size_t i_in = 0, i_out = 0;
const char * p_in = NULL;
char * p_out = NULL;
char * psz_new_line = NULL;
/* iconv */
/* UTF-8 needs at most 150% of the buffer as many as UTF-16 */
i_new_line = i_line * 3 / 2;
psz_new_line = malloc( i_new_line );
if( psz_new_line == NULL )
goto error;
i_in = (size_t)i_line;
i_out = (size_t)i_new_line;
p_in = p_line;
p_out = psz_new_line;
if( vlc_iconv( priv->text.conv, &p_in, &i_in, &p_out, &i_out ) == (size_t)-1 )
{
msg_Err( s, "iconv failed" );
msg_Dbg( s, "original: %d, in %d, out %d", i_line, (int)i_in, (int)i_out );
}
free( p_line );
p_line = psz_new_line;
i_line = (size_t)i_new_line - i_out; /* does not include \0 */
}
/* Remove trailing LF/CR */
while( i_line >= 2 && ( p_line[i_line-2] == '\r' ||
p_line[i_line-2] == '\n') ) i_line--;
/* Make sure the \0 is there */
p_line[i_line-1] = '\0';
return p_line;
}
error:
/* We failed to read any data, probably EOF */
free( p_line );
/* */
if( priv->text.conv != (vlc_iconv_t)(-1) )
{
vlc_iconv_close( priv->text.conv );
priv->text.conv = (vlc_iconv_t)(-1);
}
return NULL;
}
status_t MatroskaSource::read(
MediaBuffer **out, const ReadOptions *options) {
*out = NULL;
int64_t targetSampleTimeUs = -1ll;
int64_t seekTimeUs;
ReadOptions::SeekMode mode;
if (options && options->getSeekTo(&seekTimeUs, &mode)
&& !mExtractor->isLiveStreaming()) {
clearPendingFrames();
// The audio we want is located by using the Cues to seek the video
// stream to find the target Cluster then iterating to finalize for
// audio.
int64_t actualFrameTimeUs;
mBlockIter.seek(seekTimeUs, mIsAudio, &actualFrameTimeUs);
if (mode == ReadOptions::SEEK_CLOSEST) {
targetSampleTimeUs = actualFrameTimeUs;
}
}
while (mPendingFrames.empty()) {
status_t err = readBlock();
if (err != OK) {
clearPendingFrames();
return err;
}
}
MediaBuffer *frame = *mPendingFrames.begin();
mPendingFrames.erase(mPendingFrames.begin());
if (mType != AVC || mNALSizeLen == 0) {
if (targetSampleTimeUs >= 0ll) {
frame->meta_data()->setInt64(
kKeyTargetTime, targetSampleTimeUs);
}
*out = frame;
return OK;
}
// Each input frame contains one or more NAL fragments, each fragment
// is prefixed by mNALSizeLen bytes giving the fragment length,
// followed by a corresponding number of bytes containing the fragment.
// We output all these fragments into a single large buffer separated
// by startcodes (0x00 0x00 0x00 0x01).
//
// When mNALSizeLen is 0, we assume the data is already in the format
// desired.
const uint8_t *srcPtr =
(const uint8_t *)frame->data() + frame->range_offset();
size_t srcSize = frame->range_length();
size_t dstSize = 0;
MediaBuffer *buffer = NULL;
uint8_t *dstPtr = NULL;
for (int32_t pass = 0; pass < 2; ++pass) {
size_t srcOffset = 0;
size_t dstOffset = 0;
while (srcOffset + mNALSizeLen <= srcSize) {
size_t NALsize;
switch (mNALSizeLen) {
case 1: NALsize = srcPtr[srcOffset]; break;
case 2: NALsize = U16_AT(srcPtr + srcOffset); break;
case 3: NALsize = U24_AT(srcPtr + srcOffset); break;
case 4: NALsize = U32_AT(srcPtr + srcOffset); break;
default:
TRESPASS();
}
if (srcOffset + mNALSizeLen + NALsize <= srcOffset + mNALSizeLen) {
frame->release();
frame = NULL;
return ERROR_MALFORMED;
} else if (srcOffset + mNALSizeLen + NALsize > srcSize) {
break;
}
if (pass == 1) {
memcpy(&dstPtr[dstOffset], "\x00\x00\x00\x01", 4);
if (frame != buffer) {
memcpy(&dstPtr[dstOffset + 4],
&srcPtr[srcOffset + mNALSizeLen],
NALsize);
}
}
dstOffset += 4; // 0x00 00 00 01
dstOffset += NALsize;
srcOffset += mNALSizeLen + NALsize;
}
if (srcOffset < srcSize) {
// There were trailing bytes or not enough data to complete
// a fragment.
frame->release();
frame = NULL;
return ERROR_MALFORMED;
}
if (pass == 0) {
dstSize = dstOffset;
if (dstSize == srcSize && mNALSizeLen == 4) {
// In this special case we can re-use the input buffer by substituting
// each 4-byte nal size with a 4-byte start code
buffer = frame;
} else {
buffer = new MediaBuffer(dstSize);
}
int64_t timeUs;
CHECK(frame->meta_data()->findInt64(kKeyTime, &timeUs));
int32_t isSync;
CHECK(frame->meta_data()->findInt32(kKeyIsSyncFrame, &isSync));
buffer->meta_data()->setInt64(kKeyTime, timeUs);
buffer->meta_data()->setInt32(kKeyIsSyncFrame, isSync);
dstPtr = (uint8_t *)buffer->data();
}
}
if (frame != buffer) {
frame->release();
frame = NULL;
}
if (targetSampleTimeUs >= 0ll) {
buffer->meta_data()->setInt64(
kKeyTargetTime, targetSampleTimeUs);
}
*out = buffer;
return OK;
}
ARTPAssembler::AssemblyStatus AMPEG4ElementaryAssembler::addPacket(
const sp<ARTPSource> &source) {
List<sp<ABuffer> > *queue = source->queue();
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
if (mNextExpectedSeqNoValid) {
List<sp<ABuffer> >::iterator it = queue->begin();
while (it != queue->end()) {
if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) {
break;
}
it = queue->erase(it);
}
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
}
sp<ABuffer> buffer = *queue->begin();
if (!mNextExpectedSeqNoValid) {
mNextExpectedSeqNoValid = true;
mNextExpectedSeqNo = (uint32_t)buffer->int32Data();
} else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) {
LOGV("Not the sequence number I expected");
return WRONG_SEQUENCE_NUMBER;
}
uint32_t rtpTime;
if (!buffer->meta()->findInt32("rtp-time", (int32_t *)&rtpTime)) {
LOGW("Cannot find rtp-time. Malformed packet.");
return MALFORMED_PACKET;
}
if (mPackets.size() > 0 && rtpTime != mAccessUnitRTPTime) {
if (!submitAccessUnit()) {
LOGW("Cannot find rtp-time. Malformed packet.");
return MALFORMED_PACKET;
}
}
// If constantDuration and CTSDelta are not present. We should assume the
// stream has fixed duration and calculate the mConstantDuration.
if (!mConstantDuration && !mCTSDeltaLength && mPreviousAUCount
&& rtpTime > mAccessUnitRTPTime) {
mConstantDuration = (rtpTime - mAccessUnitRTPTime) / mPreviousAUCount;
}
mAccessUnitRTPTime = rtpTime;
if (!mIsGeneric) {
mPackets.push_back(buffer);
} else {
// hexdump(buffer->data(), buffer->size());
if (buffer->size() < 2u) {
LOGW("Payload format error. Malformed packet.");
return MALFORMED_PACKET;
}
unsigned AU_headers_length = U16_AT(buffer->data()); // in bits
if (buffer->size() < 2 + (AU_headers_length + 7) / 8) {
LOGW("Payload format error. Malformed packet.");
return MALFORMED_PACKET;
}
List<AUHeader> headers;
ABitReader bits(buffer->data() + 2, buffer->size() - 2);
unsigned numBitsLeft = AU_headers_length;
unsigned AU_serial = 0;
for (;;) {
if (numBitsLeft < mSizeLength) { break; }
unsigned AU_size = bits.getBits(mSizeLength);
numBitsLeft -= mSizeLength;
size_t n = headers.empty() ? mIndexLength : mIndexDeltaLength;
if (numBitsLeft < n) { break; }
unsigned AU_index = bits.getBits(n);
numBitsLeft -= n;
if (headers.empty()) {
AU_serial = AU_index;
} else {
AU_serial += 1 + AU_index;
}
if (mCTSDeltaLength > 0) {
if (numBitsLeft < 1) {
break;
}
--numBitsLeft;
if (bits.getBits(1)) {
if (numBitsLeft < mCTSDeltaLength) {
break;
}
bits.skipBits(mCTSDeltaLength);
numBitsLeft -= mCTSDeltaLength;
}
}
if (mDTSDeltaLength > 0) {
if (numBitsLeft < 1) {
break;
}
--numBitsLeft;
if (bits.getBits(1)) {
if (numBitsLeft < mDTSDeltaLength) {
break;
}
bits.skipBits(mDTSDeltaLength);
numBitsLeft -= mDTSDeltaLength;
}
}
if (mRandomAccessIndication) {
if (numBitsLeft < 1) {
break;
}
bits.skipBits(1);
--numBitsLeft;
}
if (mStreamStateIndication > 0) {
if (numBitsLeft < mStreamStateIndication) {
break;
}
bits.skipBits(mStreamStateIndication);
}
AUHeader header;
header.mSize = AU_size;
header.mSerial = AU_serial;
headers.push_back(header);
}
size_t offset = 2 + (AU_headers_length + 7) / 8;
if (mAuxiliaryDataSizeLength > 0) {
ABitReader bits(buffer->data() + offset, buffer->size() - offset);
unsigned auxSize = bits.getBits(mAuxiliaryDataSizeLength);
offset += (mAuxiliaryDataSizeLength + auxSize + 7) / 8;
}
mPreviousAUCount = 0;
for (List<AUHeader>::iterator it = headers.begin();
it != headers.end(); ++it) {
mPreviousAUCount++;
const AUHeader &header = *it;
const AUHeader &first = *headers.begin();
if (offset + header.mSize > buffer->size()) {
LOGW("Payload format error. Malformed packet.");
return MALFORMED_PACKET;
}
sp<ABuffer> accessUnit = new ABuffer(header.mSize);
memcpy(accessUnit->data(), buffer->data() + offset, header.mSize);
offset += header.mSize;
int rtpTime = mAccessUnitRTPTime +
mConstantDuration * (header.mSerial - first.mSerial);
accessUnit->meta()->setInt32("rtp-time", rtpTime);
accessUnit->setInt32Data(buffer->int32Data());
mPackets.push_back(accessUnit);
}
if (offset != buffer->size()) {
LOGW("Payload format error. Malformed packet.");
return MALFORMED_PACKET;
}
}
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return OK;
}
// To extract box 'tx3g' defined in 3GPP TS 26.245, and store it in a Parcel
status_t TextDescriptions::extract3GPPGlobalDescriptions(
const uint8_t *data, ssize_t size, Parcel *parcel, int depth) {
ssize_t chunkSize = U32_AT(data);
uint32_t chunkType = U32_AT(data + 4);
const uint8_t *tmpData = data;
tmpData += 8;
if (size < chunkSize) {
return OK;
}
if (depth == 0) {
parcel->writeInt32(KEY_GLOBAL_SETTING);
}
switch(chunkType) {
case FOURCC('t', 'x', '3', 'g'):
{
tmpData += 8; // skip the first 8 bytes
parcel->writeInt32(KEY_DISPLAY_FLAGS);
parcel->writeInt32(U32_AT(tmpData));
parcel->writeInt32(KEY_STRUCT_JUSTIFICATION);
parcel->writeInt32(tmpData[4]);
parcel->writeInt32(tmpData[5]);
parcel->writeInt32(KEY_BACKGROUND_COLOR_RGBA);
uint32_t rgba = *(tmpData + 6) << 24 | *(tmpData + 7) << 16
| *(tmpData + 8) << 8 | *(tmpData + 9);
parcel->writeInt32(rgba);
tmpData += 10;
parcel->writeInt32(KEY_STRUCT_TEXT_POS);
parcel->writeInt32(U16_AT(tmpData));
parcel->writeInt32(U16_AT(tmpData + 2));
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(U16_AT(tmpData + 6));
tmpData += 8;
parcel->writeInt32(KEY_STRUCT_STYLE_LIST);
parcel->writeInt32(KEY_START_CHAR);
parcel->writeInt32(U16_AT(tmpData));
parcel->writeInt32(KEY_END_CHAR);
parcel->writeInt32(U16_AT(tmpData + 2));
parcel->writeInt32(KEY_FONT_ID);
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(KEY_STYLE_FLAGS);
parcel->writeInt32(*(tmpData + 6));
parcel->writeInt32(KEY_FONT_SIZE);
parcel->writeInt32(*(tmpData + 7));
parcel->writeInt32(KEY_TEXT_COLOR_RGBA);
rgba = *(tmpData + 8) << 24 | *(tmpData + 9) << 16
| *(tmpData + 10) << 8 | *(tmpData + 11);
parcel->writeInt32(rgba);
tmpData += 12;
parcel->writeInt32(KEY_STRUCT_FONT_LIST);
uint16_t count = U16_AT(tmpData);
parcel->writeInt32(count);
tmpData += 2;
for (int i = 0; i < count; i++) {
// font ID
parcel->writeInt32(U16_AT(tmpData));
// font name length
parcel->writeInt32(*(tmpData + 2));
int len = *(tmpData + 2);
parcel->write(tmpData + 3, len);
tmpData += 3 + len;
}
break;
}
default:
{
break;
}
}
data += chunkSize;
size -= chunkSize;
if (size > 0) {
// continue to extract next 'tx3g'
return extract3GPPGlobalDescriptions(data, size, parcel, 1);
}
return OK;
}
status_t DRMSource::read(MediaBuffer **buffer, const ReadOptions *options) {
Mutex::Autolock autoLock(mDRMLock);
status_t err;
if ((err = mOriginalMediaSource->read(buffer, options)) != OK) {
return err;
}
size_t len = (*buffer)->range_length();
char *src = (char *)(*buffer)->data() + (*buffer)->range_offset();
DrmBuffer encryptedDrmBuffer(src, len);
DrmBuffer decryptedDrmBuffer;
decryptedDrmBuffer.length = len;
decryptedDrmBuffer.data = new char[len];
DrmBuffer *pDecryptedDrmBuffer = &decryptedDrmBuffer;
if ((err = mDrmManagerClient->decrypt(mDecryptHandle, mTrackId,
&encryptedDrmBuffer, &pDecryptedDrmBuffer)) != NO_ERROR) {
if (decryptedDrmBuffer.data) {
delete [] decryptedDrmBuffer.data;
decryptedDrmBuffer.data = NULL;
}
return err;
}
CHECK(pDecryptedDrmBuffer == &decryptedDrmBuffer);
const char *mime;
CHECK(getFormat()->findCString(kKeyMIMEType, &mime));
if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC) && !mWantsNALFragments) {
uint8_t *dstData = (uint8_t*)src;
size_t srcOffset = 0;
size_t dstOffset = 0;
len = decryptedDrmBuffer.length;
while (srcOffset < len) {
CHECK(srcOffset + mNALLengthSize <= len);
size_t nalLength = 0;
const uint8_t* data = (const uint8_t*)(&decryptedDrmBuffer.data[srcOffset]);
switch (mNALLengthSize) {
case 1:
nalLength = *data;
break;
case 2:
nalLength = U16_AT(data);
break;
case 3:
nalLength = ((size_t)data[0] << 16) | U16_AT(&data[1]);
break;
case 4:
nalLength = U32_AT(data);
break;
default:
CHECK(!"Should not be here.");
break;
}
srcOffset += mNALLengthSize;
if (srcOffset + nalLength > len) {
if (decryptedDrmBuffer.data) {
delete [] decryptedDrmBuffer.data;
decryptedDrmBuffer.data = NULL;
}
return ERROR_MALFORMED;
}
if (nalLength == 0) {
continue;
}
CHECK(dstOffset + 4 <= (*buffer)->size());
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 0;
dstData[dstOffset++] = 1;
memcpy(&dstData[dstOffset], &decryptedDrmBuffer.data[srcOffset], nalLength);
srcOffset += nalLength;
dstOffset += nalLength;
}
CHECK_EQ(srcOffset, len);
(*buffer)->set_range((*buffer)->range_offset(), dstOffset);
} else {
memcpy(src, decryptedDrmBuffer.data, decryptedDrmBuffer.length);
(*buffer)->set_range((*buffer)->range_offset(), decryptedDrmBuffer.length);
}
if (decryptedDrmBuffer.data) {
delete [] decryptedDrmBuffer.data;
decryptedDrmBuffer.data = NULL;
}
return OK;
}
// Extract the local 3GPP display descriptions. 3GPP local descriptions
// are appended to the text sample if any. The descriptions could include
// information such as text styles, highlights, karaoke and so on. They
// are contained in different boxes, such as 'styl' box contains text
// styles, and 'krok' box contains karaoke timing and positions.
status_t TextDescriptions::extract3GPPLocalDescriptions(
const uint8_t *data, ssize_t size,
int timeMs, Parcel *parcel) {
parcel->writeInt32(KEY_LOCAL_SETTING);
// write start time to display this text sample
parcel->writeInt32(KEY_START_TIME);
parcel->writeInt32(timeMs);
if (size < 2) {
return OK;
}
ssize_t textLen = (*data) << 8 | (*(data + 1));
if (size < textLen + 2) {
return OK;
}
// write text sample length and text sample itself
parcel->writeInt32(KEY_STRUCT_TEXT);
parcel->writeInt32(textLen);
parcel->writeInt32(textLen);
parcel->write(data + 2, textLen);
if (size > textLen + 2) {
data += (textLen + 2);
size -= (textLen + 2);
} else {
return OK;
}
while (size >= 8) {
const uint8_t *tmpData = data;
ssize_t chunkSize = U32_AT(tmpData); // size includes size and type
uint32_t chunkType = U32_AT(tmpData + 4);
if (chunkSize <= 8 || chunkSize > size) {
return OK;
}
size_t remaining = chunkSize - 8;
tmpData += 8;
switch(chunkType) {
// 'styl' box specifies the style of the text.
case FOURCC('s', 't', 'y', 'l'):
{
if (remaining < 2) {
return OK;
}
size_t dataPos = parcel->dataPosition();
uint16_t count = U16_AT(tmpData);
tmpData += 2;
remaining -= 2;
for (int i = 0; i < count; i++) {
if (remaining < 12) {
// roll back
parcel->setDataPosition(dataPos);
return OK;
}
parcel->writeInt32(KEY_STRUCT_STYLE_LIST);
parcel->writeInt32(KEY_START_CHAR);
parcel->writeInt32(U16_AT(tmpData));
parcel->writeInt32(KEY_END_CHAR);
parcel->writeInt32(U16_AT(tmpData + 2));
parcel->writeInt32(KEY_FONT_ID);
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(KEY_STYLE_FLAGS);
parcel->writeInt32(*(tmpData + 6));
parcel->writeInt32(KEY_FONT_SIZE);
parcel->writeInt32(*(tmpData + 7));
parcel->writeInt32(KEY_TEXT_COLOR_RGBA);
uint32_t rgba = *(tmpData + 8) << 24 | *(tmpData + 9) << 16
| *(tmpData + 10) << 8 | *(tmpData + 11);
parcel->writeInt32(rgba);
tmpData += 12;
remaining -= 12;
}
break;
}
// 'krok' box. The number of highlight events is specified, and each
// event is specified by a starting and ending char offset and an end
// time for the event.
case FOURCC('k', 'r', 'o', 'k'):
{
if (remaining < 6) {
return OK;
}
size_t dataPos = parcel->dataPosition();
parcel->writeInt32(KEY_STRUCT_KARAOKE_LIST);
int startTime = U32_AT(tmpData);
uint16_t count = U16_AT(tmpData + 4);
parcel->writeInt32(count);
tmpData += 6;
remaining -= 6;
int lastEndTime = 0;
for (int i = 0; i < count; i++) {
if (remaining < 8) {
// roll back
parcel->setDataPosition(dataPos);
return OK;
}
parcel->writeInt32(startTime + lastEndTime);
lastEndTime = U32_AT(tmpData);
parcel->writeInt32(lastEndTime);
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(U16_AT(tmpData + 6));
tmpData += 8;
remaining -= 8;
}
break;
}
// 'hlit' box specifies highlighted text
case FOURCC('h', 'l', 'i', 't'):
{
if (remaining < 4) {
return OK;
}
parcel->writeInt32(KEY_STRUCT_HIGHLIGHT_LIST);
// the start char offset to highlight
parcel->writeInt32(U16_AT(tmpData));
// the last char offset to highlight
parcel->writeInt32(U16_AT(tmpData + 2));
tmpData += 4;
remaining -= 4;
break;
}
// 'hclr' box specifies the RGBA color: 8 bits each of
// red, green, blue, and an alpha(transparency) value
case FOURCC('h', 'c', 'l', 'r'):
{
if (remaining < 4) {
return OK;
}
parcel->writeInt32(KEY_HIGHLIGHT_COLOR_RGBA);
uint32_t rgba = *(tmpData) << 24 | *(tmpData + 1) << 16
| *(tmpData + 2) << 8 | *(tmpData + 3);
parcel->writeInt32(rgba);
tmpData += 4;
remaining -= 4;
break;
}
// 'dlay' box specifies a delay after a scroll in and/or
// before scroll out.
case FOURCC('d', 'l', 'a', 'y'):
{
if (remaining < 4) {
return OK;
}
parcel->writeInt32(KEY_SCROLL_DELAY);
uint32_t delay = *(tmpData) << 24 | *(tmpData + 1) << 16
| *(tmpData + 2) << 8 | *(tmpData + 3);
parcel->writeInt32(delay);
tmpData += 4;
remaining -= 4;
break;
}
// 'href' box for hyper text link
case FOURCC('h', 'r', 'e', 'f'):
{
if (remaining < 5) {
return OK;
}
size_t dataPos = parcel->dataPosition();
parcel->writeInt32(KEY_STRUCT_HYPER_TEXT_LIST);
// the start offset of the text to be linked
parcel->writeInt32(U16_AT(tmpData));
// the end offset of the text
parcel->writeInt32(U16_AT(tmpData + 2));
// the number of bytes in the following URL
size_t len = *(tmpData + 4);
parcel->writeInt32(len);
remaining -= 5;
if (remaining < len) {
parcel->setDataPosition(dataPos);
return OK;
}
// the linked-to URL
parcel->writeInt32(len);
parcel->write(tmpData + 5, len);
tmpData += (5 + len);
remaining -= len;
if (remaining < 1) {
parcel->setDataPosition(dataPos);
return OK;
}
// the number of bytes in the following "alt" string
len = *tmpData;
parcel->writeInt32(len);
tmpData += 1;
remaining -= 1;
if (remaining < len) {
parcel->setDataPosition(dataPos);
return OK;
}
// an "alt" string for user display
parcel->writeInt32(len);
parcel->write(tmpData, len);
tmpData += 1;
remaining -= 1;
break;
}
// 'tbox' box to indicate the position of the text with values
// of top, left, bottom and right
case FOURCC('t', 'b', 'o', 'x'):
{
if (remaining < 8) {
return OK;
}
parcel->writeInt32(KEY_STRUCT_TEXT_POS);
parcel->writeInt32(U16_AT(tmpData));
parcel->writeInt32(U16_AT(tmpData + 2));
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(U16_AT(tmpData + 6));
tmpData += 8;
remaining -= 8;
break;
}
// 'blnk' to specify the char range to be blinked
case FOURCC('b', 'l', 'n', 'k'):
{
if (remaining < 4) {
return OK;
}
parcel->writeInt32(KEY_STRUCT_BLINKING_TEXT_LIST);
// start char offset
parcel->writeInt32(U16_AT(tmpData));
// end char offset
parcel->writeInt32(U16_AT(tmpData + 2));
tmpData += 4;
remaining -= 4;
break;
}
// 'twrp' box specifies text wrap behavior. If the value if 0x00,
// then no wrap. If it's 0x01, then automatic 'soft' wrap is enabled.
// 0x02-0xff are reserved.
case FOURCC('t', 'w', 'r', 'p'):
{
if (remaining < 1) {
return OK;
}
parcel->writeInt32(KEY_WRAP_TEXT);
parcel->writeInt32(*tmpData);
tmpData += 1;
remaining -= 1;
break;
}
default:
{
break;
}
}
data += chunkSize;
size -= chunkSize;
}
return OK;
}
// To extract box 'tx3g' defined in 3GPP TS 26.245, and store it in a Parcel
status_t TextDescriptions::extract3GPPGlobalDescriptions(
const uint8_t *data, ssize_t size, Parcel *parcel) {
parcel->writeInt32(KEY_GLOBAL_SETTING);
while (size >= 8) {
ssize_t chunkSize = U32_AT(data);
uint32_t chunkType = U32_AT(data + 4);
const uint8_t *tmpData = data;
tmpData += 8;
size_t remaining = size - 8;
if (size < chunkSize) {
return OK;
}
switch(chunkType) {
case FOURCC('t', 'x', '3', 'g'):
{
if (remaining < 18) { // 8 just below, and another 10 a little further down
return OK;
}
tmpData += 8; // skip the first 8 bytes
remaining -=8;
parcel->writeInt32(KEY_DISPLAY_FLAGS);
parcel->writeInt32(U32_AT(tmpData));
parcel->writeInt32(KEY_STRUCT_JUSTIFICATION);
parcel->writeInt32(tmpData[4]);
parcel->writeInt32(tmpData[5]);
parcel->writeInt32(KEY_BACKGROUND_COLOR_RGBA);
uint32_t rgba = *(tmpData + 6) << 24 | *(tmpData + 7) << 16
| *(tmpData + 8) << 8 | *(tmpData + 9);
parcel->writeInt32(rgba);
tmpData += 10;
remaining -= 10;
if (remaining < 8) {
return OK;
}
parcel->writeInt32(KEY_STRUCT_TEXT_POS);
parcel->writeInt32(U16_AT(tmpData));
parcel->writeInt32(U16_AT(tmpData + 2));
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(U16_AT(tmpData + 6));
tmpData += 8;
remaining -= 8;
if (remaining < 12) {
return OK;
}
parcel->writeInt32(KEY_STRUCT_STYLE_LIST);
parcel->writeInt32(KEY_START_CHAR);
parcel->writeInt32(U16_AT(tmpData));
parcel->writeInt32(KEY_END_CHAR);
parcel->writeInt32(U16_AT(tmpData + 2));
parcel->writeInt32(KEY_FONT_ID);
parcel->writeInt32(U16_AT(tmpData + 4));
parcel->writeInt32(KEY_STYLE_FLAGS);
parcel->writeInt32(*(tmpData + 6));
parcel->writeInt32(KEY_FONT_SIZE);
parcel->writeInt32(*(tmpData + 7));
parcel->writeInt32(KEY_TEXT_COLOR_RGBA);
rgba = *(tmpData + 8) << 24 | *(tmpData + 9) << 16
| *(tmpData + 10) << 8 | *(tmpData + 11);
parcel->writeInt32(rgba);
tmpData += 12;
remaining -= 12;
if (remaining < 2) {
return OK;
}
size_t dataPos = parcel->dataPosition();
parcel->writeInt32(KEY_STRUCT_FONT_LIST);
uint16_t count = U16_AT(tmpData);
parcel->writeInt32(count);
tmpData += 2;
remaining -= 2;
for (int i = 0; i < count; i++) {
if (remaining < 3) {
// roll back
parcel->setDataPosition(dataPos);
return OK;
}
// font ID
parcel->writeInt32(U16_AT(tmpData));
// font name length
parcel->writeInt32(*(tmpData + 2));
size_t len = *(tmpData + 2);
tmpData += 3;
remaining -= 3;
if (remaining < len) {
// roll back
parcel->setDataPosition(dataPos);
return OK;
}
parcel->write(tmpData, len);
tmpData += len;
remaining -= len;
}
// there is a "DisparityBox" after this according to the spec, but we ignore it
break;
}
default:
{
break;
}
}
data += chunkSize;
size -= chunkSize;
}
return OK;
}
status_t SampleTable::setSampleDescParams(uint32_t count, off64_t offset, size_t size)
{
// avcC atom will start after 78 bytes in avC1 atom
const uint32_t avcC_offset = 78;
for(uint32_t i = 0; i < count; ++i) {
uint32_t hdr[2];
if (mDataSource->readAt(offset, hdr, 8) < 8) {
return ERROR_IO;
}
uint64_t avc1_chunk_size = ntohl(hdr[0]);
uint32_t avc1_chunk_type = ntohl(hdr[1]);
off64_t avc1_data_offset = offset + 8;
if(avc1_chunk_size == 0)
return ERROR_MALFORMED;
if (avc1_chunk_size == 1) {
if (mDataSource->readAt(offset + 8, &avc1_chunk_size, 8) < 8) {
return ERROR_IO;
}
avc1_chunk_size = ntoh64(avc1_chunk_size);
if (avc1_chunk_size == 0)
return ERROR_MALFORMED;
avc1_data_offset += 8;
if (avc1_chunk_size < 16) {
// The smallest valid chunk is 16 bytes long in this case.
return ERROR_MALFORMED;
}
} else if (avc1_chunk_size < 8) {
// The smallest valid chunk is 8 bytes long.
return ERROR_MALFORMED;
}
off64_t avc1_chunk_data_size = offset + avc1_chunk_size - avc1_data_offset;
LOGV("parsing chunk %c%c%c%c", ((char *)&avc1_chunk_type)[3],
((char *)&avc1_chunk_type)[2],
((char *)&avc1_chunk_type)[1],
((char *)&avc1_chunk_type)[0]);
if (avc1_chunk_type != FOURCC('a', 'v', 'c', '1')) {
LOGE("Multiple Non AVC Sample Entries are not supported");
return ERROR_MALFORMED;
}
uint8_t *buffer = new uint8_t[(ssize_t)avc1_chunk_data_size];
if (mDataSource->readAt(avc1_data_offset, buffer, (ssize_t)avc1_chunk_data_size) < (ssize_t)avc1_chunk_data_size) {
return ERROR_IO;
}
uint16_t data_ref_index = U16_AT(&buffer[6]);
uint16_t width = U16_AT(&buffer[6 + 18]);
uint16_t height = U16_AT(&buffer[6 + 20]);
LOGE("data_ref_index : %d width : %d height: %d", data_ref_index, width, height);
/* parse AVCC atom */
uint64_t avcc_chunk_size = U32_AT(&buffer[avcC_offset]);
uint32_t avcc_chunk_type = U32_AT(&buffer[avcC_offset+4]);;
if((avcc_chunk_size == 0)|| (avcc_chunk_size == 1)) {
LOGE("chunk size error while reading avCC atom");
return ERROR_MALFORMED;
}
LOGV("parsing chunk %c%c%c%c",
((char *)&avcc_chunk_type)[3],
((char *)&avcc_chunk_type)[2],
((char *)&avcc_chunk_type)[1],
((char *)&avcc_chunk_type)[0]);
if (avcc_chunk_type != FOURCC('a', 'v', 'c', 'C')) {
LOGE("'avcC' atom expected, but not found");
return ERROR_MALFORMED;
}
off64_t avcc_chunk_data_size = avc1_chunk_data_size - avcC_offset - 8;
SampleDescAtom *sda = new SampleDescAtom;
uint8_t *avccBuffer = new uint8_t[avcc_chunk_data_size];
memcpy(avccBuffer, buffer+avcC_offset+8,avcc_chunk_data_size);
sda->ptr = avccBuffer;
sda->size = avcc_chunk_data_size;
mSampleDescAtoms.push_back(sda);
delete[] buffer;
offset += avc1_chunk_size;
}
return OK;
}
bool ID3::removeUnsynchronizationV2_4(bool iTunesHack) {
size_t oldSize = mSize;
size_t offset = 0;
while (offset + 10 <= mSize) {
if (!memcmp(&mData[offset], "\0\0\0\0", 4)) {
break;
}
size_t dataSize;
if (iTunesHack) {
dataSize = U32_AT(&mData[offset + 4]);
} else if (!ParseSyncsafeInteger(&mData[offset + 4], &dataSize)) {
return false;
}
if (offset + dataSize + 10 > mSize) {
return false;
}
uint16_t flags = U16_AT(&mData[offset + 8]);
uint16_t prevFlags = flags;
if (flags & 1) {
// Strip data length indicator
memmove(&mData[offset + 10], &mData[offset + 14], mSize - offset - 14);
mSize -= 4;
dataSize -= 4;
flags &= ~1;
}
if (flags & 2) {
// This file has "unsynchronization", so we have to replace occurrences
// of 0xff 0x00 with just 0xff in order to get the real data.
size_t readOffset = offset + 11;
size_t writeOffset = offset + 11;
for (size_t i = 0; i + 1 < dataSize; ++i) {
if (mData[readOffset - 1] == 0xff
&& mData[readOffset] == 0x00) {
++readOffset;
--mSize;
--dataSize;
}
mData[writeOffset++] = mData[readOffset++];
}
// move the remaining data following this frame
memmove(&mData[writeOffset], &mData[readOffset], oldSize - readOffset);
flags &= ~2;
}
if (flags != prevFlags || iTunesHack) {
WriteSyncsafeInteger(&mData[offset + 4], dataSize);
mData[offset + 8] = flags >> 8;
mData[offset + 9] = flags & 0xff;
}
offset += 10 + dataSize;
}
ARTPAssembler::AssemblyStatus AMPEG4ElementaryAssembler::addPacket(
const sp<ARTPSource> &source) {
List<sp<ABuffer> > *queue = source->queue();
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
if (mNextExpectedSeqNoValid) {
List<sp<ABuffer> >::iterator it = queue->begin();
while (it != queue->end()) {
if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) {
break;
}
it = queue->erase(it);
}
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
}
sp<ABuffer> buffer = *queue->begin();
if (!mNextExpectedSeqNoValid) {
mNextExpectedSeqNoValid = true;
mNextExpectedSeqNo = (uint32_t)buffer->int32Data();
} else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) {
LOGV("Not the sequence number I expected");
return WRONG_SEQUENCE_NUMBER;
}
uint32_t rtpTime;
CHECK(buffer->meta()->findInt32("rtp-time", (int32_t *)&rtpTime));
if (mPackets.size() > 0 && rtpTime != mAccessUnitRTPTime) {
submitAccessUnit();
}
mAccessUnitRTPTime = rtpTime;
if (!mIsGeneric) {
mPackets.push_back(buffer);
} else {
// hexdump(buffer->data(), buffer->size());
CHECK_GE(buffer->size(), 2u);
unsigned AU_headers_length = U16_AT(buffer->data()); // in bits
CHECK_GE(buffer->size(), 2 + (AU_headers_length + 7) / 8);
List<AUHeader> headers;
ABitReader bits(buffer->data() + 2, buffer->size() - 2);
unsigned numBitsLeft = AU_headers_length;
unsigned AU_serial = 0;
for (;;) {
if (numBitsLeft < mSizeLength) { break; }
unsigned AU_size = bits.getBits(mSizeLength);
numBitsLeft -= mSizeLength;
size_t n = headers.empty() ? mIndexLength : mIndexDeltaLength;
if (numBitsLeft < n) { break; }
unsigned AU_index = bits.getBits(n);
numBitsLeft -= n;
if (headers.empty()) {
AU_serial = AU_index;
} else {
AU_serial += 1 + AU_index;
}
if (mCTSDeltaLength > 0) {
if (numBitsLeft < 1) {
break;
}
--numBitsLeft;
if (bits.getBits(1)) {
if (numBitsLeft < mCTSDeltaLength) {
break;
}
bits.skipBits(mCTSDeltaLength);
numBitsLeft -= mCTSDeltaLength;
}
}
if (mDTSDeltaLength > 0) {
if (numBitsLeft < 1) {
break;
}
--numBitsLeft;
if (bits.getBits(1)) {
if (numBitsLeft < mDTSDeltaLength) {
break;
}
bits.skipBits(mDTSDeltaLength);
numBitsLeft -= mDTSDeltaLength;
}
}
if (mRandomAccessIndication) {
if (numBitsLeft < 1) {
break;
}
bits.skipBits(1);
--numBitsLeft;
}
if (mStreamStateIndication > 0) {
if (numBitsLeft < mStreamStateIndication) {
break;
}
bits.skipBits(mStreamStateIndication);
}
AUHeader header;
header.mSize = AU_size;
header.mSerial = AU_serial;
headers.push_back(header);
}
size_t offset = 2 + (AU_headers_length + 7) / 8;
if (mAuxiliaryDataSizeLength > 0) {
ABitReader bits(buffer->data() + offset, buffer->size() - offset);
unsigned auxSize = bits.getBits(mAuxiliaryDataSizeLength);
offset += (mAuxiliaryDataSizeLength + auxSize + 7) / 8;
}
for (List<AUHeader>::iterator it = headers.begin();
it != headers.end(); ++it) {
const AUHeader &header = *it;
CHECK_LE(offset + header.mSize, buffer->size());
sp<ABuffer> accessUnit = new ABuffer(header.mSize);
memcpy(accessUnit->data(), buffer->data() + offset, header.mSize);
offset += header.mSize;
CopyTimes(accessUnit, buffer);
mPackets.push_back(accessUnit);
}
CHECK_EQ(offset, buffer->size());
}
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return OK;
}
// static
sp<VBRISeeker> VBRISeeker::CreateFromSource(
const sp<DataSource> &source, off64_t post_id3_pos) {
off64_t pos = post_id3_pos;
uint8_t header[4];
ssize_t n = source->readAt(pos, header, sizeof(header));
if (n < (ssize_t)sizeof(header)) {
return NULL;
}
uint32_t tmp = U32_AT(&header[0]);
size_t frameSize;
int sampleRate;
if (!GetMPEGAudioFrameSize(tmp, &frameSize, &sampleRate)) {
return NULL;
}
// VBRI header follows 32 bytes after the header _ends_.
pos += sizeof(header) + 32;
uint8_t vbriHeader[26];
n = source->readAt(pos, vbriHeader, sizeof(vbriHeader));
if (n < (ssize_t)sizeof(vbriHeader)) {
return NULL;
}
if (memcmp(vbriHeader, "VBRI", 4)) {
return NULL;
}
size_t numFrames = U32_AT(&vbriHeader[14]);
int64_t durationUs =
numFrames * 1000000ll * (sampleRate >= 32000 ? 1152 : 576) / sampleRate;
ALOGV("duration = %.2f secs", durationUs / 1E6);
size_t numEntries = U16_AT(&vbriHeader[18]);
size_t entrySize = U16_AT(&vbriHeader[22]);
size_t scale = U16_AT(&vbriHeader[20]);
ALOGV("%zu entries, scale=%zu, size_per_entry=%zu",
numEntries,
scale,
entrySize);
size_t totalEntrySize = numEntries * entrySize;
uint8_t *buffer = new uint8_t[totalEntrySize];
n = source->readAt(pos + sizeof(vbriHeader), buffer, totalEntrySize);
if (n < (ssize_t)totalEntrySize) {
delete[] buffer;
buffer = NULL;
return NULL;
}
sp<VBRISeeker> seeker = new VBRISeeker;
seeker->mBasePos = post_id3_pos + frameSize;
// only update mDurationUs if the calculated duration is valid (non zero)
// otherwise, leave duration at -1 so that getDuration() and getOffsetForTime()
// return false when called, to indicate that this vbri tag does not have the
// requested information
if (durationUs) {
seeker->mDurationUs = durationUs;
}
off64_t offset = post_id3_pos;
for (size_t i = 0; i < numEntries; ++i) {
uint32_t numBytes;
switch (entrySize) {
case 1: numBytes = buffer[i]; break;
case 2: numBytes = U16_AT(buffer + 2 * i); break;
case 3: numBytes = U24_AT(buffer + 3 * i); break;
default:
{
CHECK_EQ(entrySize, 4u);
numBytes = U32_AT(buffer + 4 * i); break;
}
}
numBytes *= scale;
seeker->mSegments.push(numBytes);
ALOGV("entry #%zu: %u offset 0x%016llx", i, numBytes, offset);
offset += numBytes;
}
delete[] buffer;
buffer = NULL;
ALOGI("Found VBRI header.");
return seeker;
}