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wasapi: Open capture devices the way we used to. 

This should work around the regression in #3234, since it basically reverts
the problem change, but only for capture devices.

Fixes #3234.
This commit is contained in:
Ryan C. Gordon 2021-07-27 14:12:18 -04:00
parent b2d77e638c
commit 0d0fee7569
No known key found for this signature in database
GPG Key ID: FA148B892AB48044
1 changed files with 15 additions and 3 deletions
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18
src/audio/wasapi/SDL_wasapi.c
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@ -496,6 +496,7 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
const SDL_AudioSpec oldspec = this->spec;
const AUDCLNT_SHAREMODE sharemode = AUDCLNT_SHAREMODE_SHARED;
UINT32 bufsize = 0; /* this is in sample frames, not samples, not bytes. */
REFERENCE_TIME duration = 0;
REFERENCE_TIME default_period = 0;
IAudioClient *client = this->hidden->client;
IAudioRenderClient *render = NULL;
@ -545,7 +546,11 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
return SDL_SetError("WASAPI: Unsupported audio format");
}
ret = IAudioClient_GetDevicePeriod(client, &default_period, NULL);
if (this->iscapture) {
ret = IAudioClient_GetDevicePeriod(client, NULL, &duration);
} else {
ret = IAudioClient_GetDevicePeriod(client, &default_period, NULL);
}
if (FAILED(ret)) {
return WIN_SetErrorFromHRESULT("WASAPI can't determine minimum device period", ret);
}
@ -567,7 +572,12 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
#endif
streamflags |= AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
ret = IAudioClient_Initialize(client, sharemode, streamflags, 0, 0, waveformat, NULL);
if (this->iscapture) {
ret = IAudioClient_Initialize(client, sharemode, streamflags, duration, sharemode == AUDCLNT_SHAREMODE_SHARED ? 0 : duration, waveformat, NULL);
} else {
ret = IAudioClient_Initialize(client, sharemode, streamflags, 0, 0, waveformat, NULL);
}
if (FAILED(ret)) {
return WIN_SetErrorFromHRESULT("WASAPI can't initialize audio client", ret);
}
@ -584,7 +594,9 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
/* Match the callback size to the period size to cut down on the number of
interrupts waited for in each call to WaitDevice */
{
if (this->iscapture) {
this->spec.samples = ((Uint16) bufsize) / 2; /* fill half of the DMA buffer on each run. */
} else {
const float period_millis = default_period / 10000.0f;
const float period_frames = period_millis * this->spec.freq / 1000.0f;
this->spec.samples = (Uint16)SDL_ceilf(period_frames);