int QuickTimeParser::readESDS(Atom atom) {
if (_tracks.empty())
return 0;
Track *track = _tracks.back();
// We should only get here within an stsd atom
if (track->sampleDescs.empty())
return -1;
SampleDesc *sampleDesc = track->sampleDescs.back();
_fd->readUint32BE(); // version + flags
byte tag;
int length;
readMP4Desc(_fd, tag, length);
_fd->readUint16BE(); // id
if (tag == kMP4ESDescTag)
_fd->readByte(); // priority
// Check if we've got the Config MPEG-4 header
readMP4Desc(_fd, tag, length);
if (tag != kMP4DecConfigDescTag)
return 0;
sampleDesc->_objectTypeMP4 = _fd->readByte();
_fd->readByte(); // stream type
_fd->readUint16BE(); _fd->readByte(); // buffer size
_fd->readUint32BE(); // max bitrate
_fd->readUint32BE(); // avg bitrate
// Check if we've got the Specific MPEG-4 header
readMP4Desc(_fd, tag, length);
if (tag != kMP4DecSpecificDescTag)
return 0;
sampleDesc->_extraData = _fd->readStream(length);
debug(0, "MPEG-4 object type = %02x", sampleDesc->_objectTypeMP4);
return 0;
}
int QuickTimeDecoder::readESDS(Atom atom) {
if (_tracks.empty())
return 0;
Track *track = _tracks.back();
_fd->readUint32BE(); // version + flags
byte tag;
int length;
readMP4Desc(_fd, tag, length);
_fd->readUint16BE(); // id
if (tag == kMP4ESDescTag)
_fd->readByte(); // priority
// Check if we've got the Config MPEG-4 header
readMP4Desc(_fd, tag, length);
if (tag != kMP4DecConfigDescTag)
return 0;
track->objectTypeMP4 = _fd->readByte();
_fd->readByte(); // stream type
_fd->readUint16BE(); _fd->readByte(); // buffer size
_fd->readUint32BE(); // max bitrate
_fd->readUint32BE(); // avg bitrate
// Check if we've got the Specific MPEG-4 header
readMP4Desc(_fd, tag, length);
if (tag != kMP4DecSpecificDescTag)
return 0;
track->extraData = _fd->readStream(length);
return 0;
}
