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ao/wasapi: make get_device_delay return an error code

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This commit is contained in:
Kevin Mitchell 2014-11-23 00:15:53 -08:00
parent 2658dc712d
commit e4aaaf69df
1 changed files with 21 additions and 12 deletions
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33
audio/out/ao_wasapi.c
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@ -36,18 +36,19 @@
#include "osdep/timer.h"
#include "osdep/io.h"
static double get_device_delay(struct wasapi_state *state) {
static HRESULT get_device_delay(struct wasapi_state *state, double *delay) {
UINT64 sample_count = atomic_load(&state->sample_count);
UINT64 position, qpc_position;
HRESULT hr;
switch (hr = IAudioClock_GetPosition(state->pAudioClock, &position, &qpc_position)) {
case S_OK: case S_FALSE:
break;
default:
MP_ERR(state, "IAudioClock::GetPosition returned %s (0x%"PRIx32")\n",
wasapi_explain_err(hr), (uint32_t)hr);
hr = IAudioClock_GetPosition(state->pAudioClock, &position, &qpc_position);
/* GetPosition succeeded, but the result may be inaccurate due to the length of the call */
/* http://msdn.microsoft.com/en-us/library/windows/desktop/dd370889%28v=vs.85%29.aspx */
if ( hr == S_FALSE) {
MP_DBG(state, "Possibly inaccurate device position.\n");
hr = S_OK;
}
EXIT_ON_ERROR(hr);
LARGE_INTEGER qpc_count;
QueryPerformanceCounter(&qpc_count);
@ -59,11 +60,15 @@ static double get_device_delay(struct wasapi_state *state) {
position = position * state->format.Format.nSamplesPerSec / state->clock_frequency;
double diff = sample_count - position;
double delay = diff / state->format.Format.nSamplesPerSec;
*delay = diff / state->format.Format.nSamplesPerSec;
MP_TRACE(state, "Device delay: %g samples (%g ms)\n", diff, delay * 1000);
MP_TRACE(state, "Device delay: %g samples (%g ms)\n", diff, *delay * 1000);
return delay;
return S_OK;
exit_label:
MP_ERR(state, "Error getting device delay: %s (0x%"PRIx32")\n",
wasapi_explain_err(hr), (uint32_t)hr);
return hr;
}
static void thread_feed(struct ao *ao)
@ -81,6 +86,9 @@ static void thread_feed(struct ao *ao)
frame_count -= padding;
MP_TRACE(ao, "Frame to fill: %"PRIu32". Padding: %"PRIu32"\n", frame_count, padding);
}
double delay;
hr = get_device_delay(state, &delay);
EXIT_ON_ERROR(hr);
BYTE *pData;
hr = IAudioRenderClient_GetBuffer(state->pRenderClient,
@ -88,9 +96,10 @@ static void thread_feed(struct ao *ao)
EXIT_ON_ERROR(hr);
BYTE *data[1] = {pData};
ao_read_data(ao, (void**)data, frame_count, (int64_t) (
mp_time_us() + get_device_delay(state) * 1e6 +
frame_count * 1e6 / state->format.Format.nSamplesPerSec));
mp_time_us() + delay * 1e6 +
frame_count * 1e6 / state->format.Format.nSamplesPerSec));
hr = IAudioRenderClient_ReleaseBuffer(state->pRenderClient,
frame_count, 0);