C++ (Cpp) advanceDtsBySample Examples

Example #1

File: ADM_audioStreamDCA.cpp Project: BackupTheBerlios/avidemux-svn

/**
        \fn getPacket
*/
uint8_t ADM_audioStreamDCA::getPacket(uint8_t *obuffer,uint32_t *osize, uint32_t sizeMax,uint32_t *nbSample,uint64_t *dts)
{
#define ADM_LOOK_AHEAD DTS_HEADER_SIZE // Need 10 bytes...
uint8_t data[ADM_LOOK_AHEAD];
uint32_t offset;
ADM_DCA_INFO info;
    while(1)
    {
        // Do we have sync ?
        if(needBytes(ADM_LOOK_AHEAD)==false) 
        {
            ADM_warning("DCA: Not sync found in buffer\n");
            return false;
        }
            
        // Peek
        peek(ADM_LOOK_AHEAD,data);
        // Search start seq
        if(buffer[start]!=0x7F || buffer[start+1]!=0xFE)
        {
            read8();
            continue;
        }
        if(buffer[start+2]!=0x80 || buffer[start+3]!=0x1)
        {
            read8();
            read8();
            continue;
        }

        if(false== ADM_DCAGetInfo(buffer+start, limit-start,&info,&offset))
        {
            read8();
            read8();
            read8();
            read8();
            continue;
        }
        ADM_assert(info.frameSizeInBytes<=sizeMax);
        if(needBytes(info.frameSizeInBytes)==false)
        {
            ADM_warning("DCA: Not enough data\n");
            return false;
        }
        *osize=info.frameSizeInBytes;
        read(*osize,obuffer);
        *nbSample=info.samples;
        *dts=lastDts;
        advanceDtsBySample(*nbSample);
        return 1;

    }
}

Example #2

File: ADM_audioStreamPCM.cpp Project: AlexanderStohr/avidemux2

/**
        \fn getPacket
*/
uint8_t ADM_audioStreamPCM::getPacket(uint8_t *obuffer,uint32_t *osize, 
                                      uint32_t sizeMax,uint32_t *nbSample,uint64_t *dts)
{
uint64_t thisDts=0;
    if(!access->getPacket(obuffer,osize,sizeMax,&thisDts)) return 0;

    int  sampleSize=2;
    if(wavHeader.bitspersample==8) sampleSize=1;
    uint32_t bytesPerSample=wavHeader.channels*sampleSize; 
//#warning fixme handle mono
    *nbSample=(uint32_t)(*osize/bytesPerSample);
    if(thisDts!=ADM_NO_PTS) 
            setDts(thisDts);
    *dts=lastDts;
//    printf(">>audioCore : PCM packet : %s\n",ADM_us2plain(*dts));
    advanceDtsBySample(*nbSample);
    return 1;
}

Example #3

File: ADM_audioStreamAC3.cpp Project: BackupTheBerlios/avidemux-svn

/**
        \fn getPacket
*/
uint8_t ADM_audioStreamAC3::getPacket(uint8_t *obuffer,uint32_t *osize, uint32_t sizeMax,uint32_t *nbSample,uint64_t *dts)
{
#define ADM_LOOK_AHEAD 6 // Need 6 bytes...
uint8_t data[ADM_LOOK_AHEAD];
int size;
int flags,sample_rate,bit_rate;

    while(1)
    {
        // Do we have sync ?
        if(needBytes(ADM_LOOK_AHEAD)==false) return 0;
        // Peek
        peek(ADM_LOOK_AHEAD,data);
        // Search start seq
        if(buffer[start]!=0x0b || buffer[start+1]!=0x77)
        {
            read8();
            continue;
        }
        // 
        size= ADM_a52_syncinfo (buffer+start, &flags, &sample_rate, &bit_rate);
        
        if(!size)
        {
            read8();
            continue;
        }
        
        ADM_assert(size<=sizeMax);
        if(needBytes(size)==false)
        {
            return false;
        }
        *osize=size;
        read(size,obuffer);
        *nbSample=256*6;
        *dts=lastDts;
        advanceDtsBySample(*nbSample);
        return 1;
            
    }
}