// returns bytes read, else -1 if error (0 is OK)
int AmAudio::get(unsigned long long system_ts, unsigned char* buffer,
int output_sample_rate, unsigned int nb_samples)
{
int size = calcBytesToRead((int)((float)nb_samples * (float)getSampleRate()
/ (float)output_sample_rate));
unsigned int rd_ts = scaleSystemTS(system_ts);
//DBG("\tread(rd_ts = %10.u; size = %u)\n",rd_ts,size);
size = read(rd_ts,size);
if(size <= 0){
return size;
}
size = decode(size);
if(size < 0) {
DBG("decode returned %i\n",size);
return -1;
}
size = downMix(size);
size = resampleOutput((unsigned char*)samples, size,
getSampleRate(), output_sample_rate);
if(size>0)
memcpy(buffer,(unsigned char*)samples,size);
return size;
}
// returns bytes read, else -1 if error (0 is OK)
int RtmpAudio::get(unsigned long long system_ts, unsigned char* buffer,
int output_sample_rate, unsigned int nb_samples)
{
// - buffer RTMP audio
// - read from RTMP recv buffer
unsigned int user_ts = scaleSystemTS(system_ts);
//DBG("get(%u, %u)\n",user_ts,nb_samples);
process_recv_queue(user_ts);
nb_samples = (unsigned int)((float)nb_samples * (float)getSampleRate()
/ (float)output_sample_rate);
u_int32_t size =
PCM16_S2B(playout_buffer.read(user_ts,
(ShortSample*)((unsigned char*)samples),
nb_samples));
if(output_sample_rate != getSampleRate()) {
size = resampleOutput((unsigned char*)samples, size,
getSampleRate(), output_sample_rate);
}
memcpy(buffer,(unsigned char*)samples,size);
return size;
}
int AmRtpAudio::get(unsigned long long system_ts, unsigned char* buffer,
int output_sample_rate, unsigned int nb_samples)
{
if (!(receiving || getPassiveMode())) return 0; // like nothing received
int ret = receive(system_ts);
if(ret < 0)
return ret; // like nothing received?
if (!active) return 0;
unsigned int user_ts = scaleSystemTS(system_ts);
nb_samples = (unsigned int)((float)nb_samples * (float)getSampleRate()
/ (float)output_sample_rate);
u_int32_t size =
PCM16_S2B(playout_buffer->read(user_ts,
(ShortSample*)((unsigned char*)samples),
nb_samples));
if(output_sample_rate != getSampleRate()) {
size = resampleOutput((unsigned char*)samples, size,
getSampleRate(), output_sample_rate);
}
memcpy(buffer,(unsigned char*)samples,size);
return size;
}
