// 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 AmAudio::get(unsigned int user_ts, unsigned char* buffer, unsigned int nb_samples)
{
int size = calcBytesToRead(nb_samples);
size = read(user_ts,size);
//DBG("size = %d\n",size);
if(size <= 0){
return size;
}
size = decode(size);
if(size < 0) {
DBG("decode returned %i\n",size);
return -1;
}
size = downMix(size);
if(size>0)
memcpy(buffer,(unsigned char*)samples,size);
return size;
}
void AmBufferedAudio::input_get_audio(unsigned int user_ts) {
if (r && (r != w)) {
// move contents to beginning of buffer
memmove(output_buffer, &output_buffer[r], w-r);
w -= r;
r = 0;
}
while (w < full_buffer_thresh) {
int size = calcBytesToRead(PCM16_B2S(output_buffer_size - w));
// DBG("calc %d bytes to read\n", size);
// resync might be delayed until buffer empty // (but output resync never happens)
size = read(user_ts + PCM16_B2S(w-r),size);
// DBG("read returned size = %d\n",size);
if(size <= 0){
err_code = size;
eof = true;
return;
}
size = decode(size);
if(size < 0) {
// DBG("decode returned %i\n",size);
err_code = size;
eof = true;
return;
}
// DBG("decode returned %i\n",size);
size = downMix(size);
if(size>0) {
memcpy(&output_buffer[w],(unsigned char*)samples,size);
w+=size;
}
}
}