void aout_PacketPlay (audio_output_t *aout, block_t *block)
{
aout_packet_t *p = aout_packet (aout);
mtime_t time_report;
vlc_mutex_lock (&p->lock);
aout_FifoPush (&p->partial, block);
while ((block = aout_OutputSlice (aout)) != NULL)
aout_FifoPush (&p->fifo, block);
time_report = p->time_report;
p->time_report = VLC_TS_INVALID;
vlc_mutex_unlock (&p->lock);
if (time_report != VLC_TS_INVALID)
aout_TimeReport (aout, mdate () - time_report);
}
static void Play(audio_output_t *aout, block_t *block)
{
aout_sys_t *sys = aout->sys;
HRESULT hr;
Enter();
if (likely(sys->clock != NULL))
{
UINT64 pos, qpcpos;
IAudioClock_GetPosition(sys->clock, &pos, &qpcpos);
qpcpos = (qpcpos + 5) / 10; /* 100ns -> 1µs */
/* NOTE: this assumes mdate() uses QPC() (which it currently does). */
aout_TimeReport(aout, qpcpos);
}
for (;;)
{
UINT32 frames;
hr = IAudioClient_GetCurrentPadding(sys->client, &frames);
if (FAILED(hr))
{
msg_Err(aout, "cannot get current padding (error 0x%lx)", hr);
break;
}
assert(frames <= sys->frames);
frames = sys->frames - frames;
if (frames > block->i_nb_samples)
frames = block->i_nb_samples;
BYTE *dst;
hr = IAudioRenderClient_GetBuffer(sys->render, frames, &dst);
if (FAILED(hr))
{
msg_Err(aout, "cannot get buffer (error 0x%lx)", hr);
break;
}
const size_t copy = frames * (size_t)aout->format.i_bytes_per_frame;
memcpy(dst, block->p_buffer, copy);
hr = IAudioRenderClient_ReleaseBuffer(sys->render, frames, 0);
if (FAILED(hr))
{
msg_Err(aout, "cannot release buffer (error 0x%lx)", hr);
break;
}
IAudioClient_Start(sys->client);
block->p_buffer += copy;
block->i_buffer -= copy;
block->i_nb_samples -= frames;
if (block->i_nb_samples == 0)
break; /* done */
/* Out of buffer space, sleep */
msleep(AOUT_MIN_PREPARE_TIME
+ block->i_nb_samples * CLOCK_FREQ / aout->format.i_rate);
}
Leave();
block_Release(block);
}
