void
ca_Play(audio_output_t * p_aout, block_t * p_block)
{
struct aout_sys_common *p_sys = (struct aout_sys_common *) p_aout->sys;
/* Do the channel reordering */
if (p_sys->chans_to_reorder)
aout_ChannelReorder(p_block->p_buffer, p_block->i_buffer,
p_sys->chans_to_reorder, p_sys->chan_table,
VLC_CODEC_FL32);
/* move data to buffer */
while (!TPCircularBufferProduceBytes(&p_sys->circular_buffer,
p_block->p_buffer, p_block->i_buffer))
{
if (atomic_load_explicit(&p_sys->b_paused, memory_order_relaxed))
{
msg_Warn(p_aout, "dropping block because the circular buffer is "
"full and paused");
break;
}
/* Try to play what we can */
int32_t i_avalaible_bytes;
TPCircularBufferHead(&p_sys->circular_buffer, &i_avalaible_bytes);
assert(i_avalaible_bytes >= 0);
if (unlikely((size_t) i_avalaible_bytes >= p_block->i_buffer))
continue;
bool ret =
TPCircularBufferProduceBytes(&p_sys->circular_buffer,
p_block->p_buffer, i_avalaible_bytes);
assert(ret == true);
p_block->p_buffer += i_avalaible_bytes;
p_block->i_buffer -= i_avalaible_bytes;
/* Wait for the render buffer to play the remaining data */
const mtime_t i_frame_us =
FramesToUs(p_sys, BytesToFrames(p_sys, p_block->i_buffer));
msleep(i_frame_us / 2);
}
unsigned i_underrun_size = atomic_exchange(&p_sys->i_underrun_size, 0);
if (i_underrun_size > 0)
msg_Warn(p_aout, "underrun of %u bytes", i_underrun_size);
block_Release(p_block);
}
// ----------------------------------------------------------
OSStatus RenderCallback(void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList *ioData)
// ----------------------------------------------------------
{
InputContext * ctx = static_cast<InputContext *>(inRefCon);
OSStatus s = AudioUnitRender(*(ctx->inputUnit),
ioActionFlags,
inTimeStamp,
inBusNumber,
inNumberFrames,
ctx->bufferList.get());
OFXAU_PRINT(s, "rendering audio input");
if(s == noErr) {
size_t buffersToCopy = std::min<size_t>(ctx->bufferList->mNumberBuffers, ctx->circularBuffers.size());
for(int i = 0; i < buffersToCopy; i++) {
TPCircularBuffer * circBuffer = &ctx->circularBuffers[i];
if(circBuffer) {
TPCircularBufferProduceBytes(circBuffer,
ctx->bufferList->mBuffers[i].mData,
inNumberFrames * sizeof(Float32));
}
}
}
return s;
}
