/**
\fn readStreamMux
\brief from vlc
*/
bool ADM_latm2aac::readAudioMux( uint64_t dts,getBits &bits )
{
if( !bits.get(1) ) // use SameStreamMux
{
if(false==readStreamMuxConfig(bits)) return false;
} // streamMuxConfig
// if(!numSubFrames) return false;
if(conf.audioMuxVersionA==0)
{
// only 1 subFrames ATM... for(int i=0;i<numSubFrames;i++)
{
int len=readPayloadInfoLength(bits);
if(!len) return false;
bool r=readPayload(bits,dts,len);
bits.align();
return r;
}
// otherdata
}
return true;
}
int ParserLatm::parsePayload(unsigned char* data, int len) {
cBitStream bs(data, len * 8);
bs.SkipBits(24); // skip header
if(!bs.GetBit()) {
readStreamMuxConfig(&bs);
}
int tmp;
unsigned int slotLen = 0;
do {
tmp = bs.GetBits(8);
slotLen += tmp;
}
while(tmp == 255);
if(slotLen * 8 > (bs.Length() - (unsigned)bs.Index())) {
return len;
}
if(m_curDts == DVD_NOPTS_VALUE) {
return len;
}
// buffer for converted payload data
int payloadlength = slotLen + 7;
uint8_t* payload = (uint8_t*)malloc(payloadlength);
// 7 bytes of ADTS header
int offset = 0;
putBits(payload, offset, 0xfff, 12); // Sync marker
putBits(payload, offset, 0, 1); // ID 0 = MPEG 4
putBits(payload, offset, 0, 2); // Layer
putBits(payload, offset, 1, 1); // Protection absent
putBits(payload, offset, 2, 2); // AOT
putBits(payload, offset, m_sampleRateIndex, 4);
putBits(payload, offset, 1, 1); // Private bit
putBits(payload, offset, m_channels, 3);
putBits(payload, offset, 1, 1); // Original
putBits(payload, offset, 1, 1); // Copy
putBits(payload, offset, 1, 1); // Copyright identification bit
putBits(payload, offset, 1, 1); // Copyright identification start
putBits(payload, offset, slotLen, 13);
putBits(payload, offset, 0, 11); // Buffer fullness
putBits(payload, offset, 0, 2); // RDB in frame
// copy AAC data
uint8_t* buf = payload + 7;
for(unsigned int i = 0; i < slotLen; i++) {
*buf++ = bs.GetBits(8);
}
// send converted payload packet
Parser::sendPayload(payload, payloadlength);
// free payload buffer
free(payload);
return len;
}