void static audioThreadEntryPoint(void* udata, uint8_t* stream, int len)
{
sdlargst* args = (sdlargst*)udata;
DSPManager* dspman = static_cast<DSPManager*>(args->dspman);
AVCodecContext* codecCtx = (AVCodecContext*)args->avcodeccontext;
packetQueue* queue = args->queue;
static uint8_t buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];
static unsigned int bufLength = 0;
static unsigned int bufCurrentIndex = 0;
uint8_t* streamIndex = stream;
int samplesLeft = len;
while(samplesLeft > 0)
{
if(bufCurrentIndex >= bufLength)
{
// No more data in the buffer, get some more.
int decodeSize = decodeFrame(codecCtx, buf, sizeof(buf), queue);
if(decodeSize < 0)
{
// something went wrong... silence.
bufCurrentIndex = AVCODEC_MAX_AUDIO_FRAME_SIZE;
memset(buf, 0, AVCODEC_MAX_AUDIO_FRAME_SIZE);
}
else
{
bufLength = decodeSize;
}
//Reset the index for the new data.
bufCurrentIndex = 0;
}
int numberOfSamples = bufLength - bufCurrentIndex;
if(numberOfSamples > samplesLeft)
numberOfSamples = samplesLeft;
memcpy(streamIndex, (uint8_t*)buf + bufCurrentIndex, numberOfSamples);
samplesLeft -= numberOfSamples;
streamIndex += numberOfSamples;
bufCurrentIndex += numberOfSamples;
}
dspman->processAudioPCM(NULL, stream, len);
if(dspman->cbuf == NULL)
dspman->cbuf = new circularBuffer::circularBuffer(CIRCBUFSIZE, sizeof(uint8_t) * len);
memcpy(dspman->cbuf->add(), stream, sizeof(uint8_t) * len);
memcpy(stream, dspman->cbuf->pop(), sizeof(uint8_t) * len);
}
void static audioThreadEntryPoint(void* udata, uint8_t* stream, int len)
{
sdlargst* args = (sdlargst*)udata;
DSPManager* dspman = static_cast<DSPManager*>(args->dspman);
AVCodecContext* codecCtx = (AVCodecContext*)args->avcodeccontext;
packetQueue* queue = args->queue;
SwrContext *swr;
static uint8_t *buf = NULL;
static unsigned int bufLength = 0;
static unsigned int bufCurrentIndex = 0;
uint8_t* streamIndex = stream;
// Setup the resample context to ensure out samples are in the
// format that SDL expectes them to be.
swr = swr_alloc();
av_opt_set_int(swr, "in_channel_layout", codecCtx->channel_layout, 0);
av_opt_set_int(swr, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
av_opt_set_int(swr, "in_sample_rate", codecCtx->sample_rate, 0);
av_opt_set_int(swr, "out_sample_rate", codecCtx->sample_rate, 0);
av_opt_set_sample_fmt(swr, "in_sample_fmt", codecCtx->sample_fmt, 0);
av_opt_set_sample_fmt(swr, "out_sample_fmt", AV_SAMPLE_FMT_S16, 0);
swr_init(swr);
int samplesLeft = len;
while(samplesLeft > 0)
{
if(bufCurrentIndex >= bufLength)
{
retry_decode:
// No more data in the buffer, get some
// more. Ensure we free the old buffer that we
// allocated in the previous decodeFrame call.
if (buf)
free(buf);
int decodeSize = decodeFrame(codecCtx, &buf, sizeof(buf), queue, swr);
if(decodeSize < 0)
{
// something went wrong... try again.
goto retry_decode;
}
else
{
bufLength = decodeSize;
}
//Reset the index for the new data.
bufCurrentIndex = 0;
}
int numberOfSamples = bufLength - bufCurrentIndex;
if(numberOfSamples > samplesLeft)
numberOfSamples = samplesLeft;
memcpy(streamIndex, (uint8_t*)buf + bufCurrentIndex, numberOfSamples);
samplesLeft -= numberOfSamples;
streamIndex += numberOfSamples;
bufCurrentIndex += numberOfSamples;
}
dspman->processAudioPCM(NULL, stream, len);
if(dspman->cbuf == NULL)
dspman->cbuf = new circularBuffer::circularBuffer(CIRCBUFSIZE, sizeof(uint8_t) * len);
memcpy(dspman->cbuf->add(), stream, sizeof(uint8_t) * len);
memcpy(stream, dspman->cbuf->pop(), sizeof(uint8_t) * len);
swr_free(&swr);
}