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ALSA: Add some debug output.

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This commit is contained in:
David Reid
2021-04-26 13:15:13 +10:00
parent 8dc54984ec
commit 50786617a8
1 changed files with 35 additions and 4 deletions
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miniaudio.h
+35 -4
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@@ -20689,19 +20689,33 @@ static ma_result ma_device_start__alsa(ma_device* pDevice)
static ma_result ma_device_stop__alsa(ma_device* pDevice)
{
#if 1
if (pDevice->type == ma_device_type_capture || pDevice->type == ma_device_type_duplex) {
((ma_snd_pcm_drain_proc)pDevice->pContext->alsa.snd_pcm_drain)((ma_snd_pcm_t*)pDevice->alsa.pPCMCapture);
#ifdef MA_DEBUG_OUTPUT
printf("[ALSA] Dropping capture device... ");
#endif
((ma_snd_pcm_drop_proc)pDevice->pContext->alsa.snd_pcm_drop)((ma_snd_pcm_t*)pDevice->alsa.pPCMCapture);
#ifdef MA_DEBUG_OUTPUT
printf("Done\n");
#endif
/* We need to prepare the device again, otherwise we won't be able to restart the device. */
if (((ma_snd_pcm_prepare_proc)pDevice->pContext->alsa.snd_pcm_prepare)((ma_snd_pcm_t*)pDevice->alsa.pPCMCapture) < 0) {
#ifdef MA_DEBUG_OUTPUT
printf("[ALSA] Failed to prepare capture device after stopping.\n");
printf("[ALSA] Preparing capture device... ");
#endif
if (((ma_snd_pcm_prepare_proc)pDevice->pContext->alsa.snd_pcm_prepare)((ma_snd_pcm_t*)pDevice->alsa.pPCMCapture) < 0) {
#ifdef MA_DEBUG_OUTPUT
printf("[ALSA] Failed to prepare capture device after stopping.\n");
#endif
} else {
#ifdef MA_DEBUG_OUTPUT
printf("Done\n");
#endif
}
}
if (pDevice->type == ma_device_type_playback || pDevice->type == ma_device_type_duplex) {
((ma_snd_pcm_drain_proc)pDevice->pContext->alsa.snd_pcm_drain)((ma_snd_pcm_t*)pDevice->alsa.pPCMPlayback);
((ma_snd_pcm_drop_proc)pDevice->pContext->alsa.snd_pcm_drop)((ma_snd_pcm_t*)pDevice->alsa.pPCMPlayback);
/* We need to prepare the device again, otherwise we won't be able to restart the device. */
if (((ma_snd_pcm_prepare_proc)pDevice->pContext->alsa.snd_pcm_prepare)((ma_snd_pcm_t*)pDevice->alsa.pPCMPlayback) < 0) {
@@ -20710,6 +20724,10 @@ static ma_result ma_device_stop__alsa(ma_device* pDevice)
#endif
}
}
#else
/* Nothing to do. We'll stop the device by simply not reading or writing. */
(void)pDevice;
#endif
return MA_SUCCESS;
}
@@ -20732,6 +20750,11 @@ static ma_result ma_device_wait__alsa(ma_device* pDevice, ma_snd_pcm_t* pPCM, st
if ((pPollDescriptors[0].revents & POLLIN) != 0) {
ma_uint64 t;
read(pPollDescriptors[0].fd, &t, sizeof(t)); /* <-- Important that we read here so that the next write() does not block. */
#ifdef MA_DEBUG_OUTPUT
printf("[ALSA] POLLIN set for wakeupfd\n");
#endif
return MA_DEVICE_NOT_STARTED;
}
@@ -20891,6 +20914,10 @@ static ma_result ma_device_data_loop_wakeup__alsa(ma_device* pDevice)
MA_ASSERT(pDevice != NULL);
#ifdef MA_DEBUG_OUTPUT
printf("[ALSA] Waking up... ");
#endif
/* Write to an eventfd to trigger a wakeup from poll() and abort any reading or writing. */
if (pDevice->alsa.pPollDescriptorsCapture != NULL) {
write(pDevice->alsa.wakeupfdCapture, &t, sizeof(t));
@@ -20899,6 +20926,10 @@ static ma_result ma_device_data_loop_wakeup__alsa(ma_device* pDevice)
write(pDevice->alsa.wakeupfdPlayback, &t, sizeof(t));
}
#ifdef MA_DEBUG_OUTPUT
printf("Done\n");
#endif
return MA_SUCCESS;
}