early-access version 1617
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18
externals/SDL/src/audio/wasapi/SDL_wasapi.c
vendored
18
externals/SDL/src/audio/wasapi/SDL_wasapi.c
vendored
@@ -18,7 +18,6 @@
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_AUDIO_DRIVER_WASAPI
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@@ -28,8 +27,6 @@
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#include "SDL_timer.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_sysaudio.h"
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#include "SDL_assert.h"
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#include "SDL_log.h"
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#define COBJMACROS
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#include <mmdeviceapi.h>
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@@ -508,7 +505,7 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
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const SDL_AudioSpec oldspec = this->spec;
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const AUDCLNT_SHAREMODE sharemode = AUDCLNT_SHAREMODE_SHARED;
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UINT32 bufsize = 0; /* this is in sample frames, not samples, not bytes. */
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REFERENCE_TIME duration = 0;
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REFERENCE_TIME default_period = 0;
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IAudioClient *client = this->hidden->client;
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IAudioRenderClient *render = NULL;
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IAudioCaptureClient *capture = NULL;
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@@ -572,7 +569,7 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
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return SDL_SetError("WASAPI: Unsupported audio format");
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}
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ret = IAudioClient_GetDevicePeriod(client, NULL, &duration);
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ret = IAudioClient_GetDevicePeriod(client, &default_period, NULL);
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if (FAILED(ret)) {
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return WIN_SetErrorFromHRESULT("WASAPI can't determine minimum device period", ret);
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}
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@@ -591,7 +588,7 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
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}
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streamflags |= AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
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ret = IAudioClient_Initialize(client, sharemode, streamflags, duration, sharemode == AUDCLNT_SHAREMODE_SHARED ? 0 : duration, waveformat, NULL);
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ret = IAudioClient_Initialize(client, sharemode, streamflags, 0, 0, waveformat, NULL);
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if (FAILED(ret)) {
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return WIN_SetErrorFromHRESULT("WASAPI can't initialize audio client", ret);
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}
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@@ -606,9 +603,12 @@ WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
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return WIN_SetErrorFromHRESULT("WASAPI can't determine buffer size", ret);
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}
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this->spec.samples = (Uint16) bufsize;
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if (!this->iscapture) {
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this->spec.samples /= 2; /* fill half of the DMA buffer on each run. */
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/* Match the callback size to the period size to cut down on the number of
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interrupts waited for in each call to WaitDevice */
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{
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const float period_millis = default_period / 10000.0f;
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const float period_frames = period_millis * this->spec.freq / 1000.0f;
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this->spec.samples = (Uint16)SDL_ceilf(period_frames);
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}
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/* Update the fragment size as size in bytes */
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