diff options
Diffstat (limited to 'Source/3rdParty/SDL2/src/audio/wasapi/SDL_wasapi.c')
| -rw-r--r-- | Source/3rdParty/SDL2/src/audio/wasapi/SDL_wasapi.c | 785 |
1 files changed, 0 insertions, 785 deletions
diff --git a/Source/3rdParty/SDL2/src/audio/wasapi/SDL_wasapi.c b/Source/3rdParty/SDL2/src/audio/wasapi/SDL_wasapi.c deleted file mode 100644 index f517539..0000000 --- a/Source/3rdParty/SDL2/src/audio/wasapi/SDL_wasapi.c +++ /dev/null @@ -1,785 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. -*/ - -#include "../../SDL_internal.h" - -#if SDL_AUDIO_DRIVER_WASAPI - -#include "../../core/windows/SDL_windows.h" -#include "SDL_audio.h" -#include "SDL_timer.h" -#include "../SDL_audio_c.h" -#include "../SDL_sysaudio.h" -#include "SDL_assert.h" -#include "SDL_log.h" - -#define COBJMACROS -#include <mmdeviceapi.h> -#include <audioclient.h> - -#include "SDL_wasapi.h" - -/* This constant isn't available on MinGW-w64 */ -#ifndef AUDCLNT_STREAMFLAGS_RATEADJUST -#define AUDCLNT_STREAMFLAGS_RATEADJUST 0x00100000 -#endif - -/* these increment as default devices change. Opened default devices pick up changes in their threads. */ -SDL_atomic_t WASAPI_DefaultPlaybackGeneration; -SDL_atomic_t WASAPI_DefaultCaptureGeneration; - -/* This is a list of device id strings we have inflight, so we have consistent pointers to the same device. */ -typedef struct DevIdList -{ - WCHAR *str; - struct DevIdList *next; -} DevIdList; - -static DevIdList *deviceid_list = NULL; - -/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */ -static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483,{ 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } }; -static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0,{ 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } }; -static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } }; -static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } }; - -static SDL_bool -WStrEqual(const WCHAR *a, const WCHAR *b) -{ - while (*a) { - if (*a != *b) { - return SDL_FALSE; - } - a++; - b++; - } - return *b == 0; -} - -static size_t -WStrLen(const WCHAR *wstr) -{ - size_t retval = 0; - if (wstr) { - while (*(wstr++)) { - retval++; - } - } - return retval; -} - -static WCHAR * -WStrDupe(const WCHAR *wstr) -{ - const size_t len = (WStrLen(wstr) + 1) * sizeof (WCHAR); - WCHAR *retval = (WCHAR *) SDL_malloc(len); - if (retval) { - SDL_memcpy(retval, wstr, len); - } - return retval; -} - - -void -WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid) -{ - DevIdList *i; - DevIdList *next; - DevIdList *prev = NULL; - for (i = deviceid_list; i; i = next) { - next = i->next; - if (WStrEqual(i->str, devid)) { - if (prev) { - prev->next = next; - } else { - deviceid_list = next; - } - SDL_RemoveAudioDevice(iscapture, i->str); - SDL_free(i->str); - SDL_free(i); - } - prev = i; - } -} - -void -WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid) -{ - DevIdList *devidlist; - - /* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever). - In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for - phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be - available and switch automatically. (!!! FIXME...?) */ - - /* see if we already have this one. */ - for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) { - if (WStrEqual(devidlist->str, devid)) { - return; /* we already have this. */ - } - } - - devidlist = (DevIdList *) SDL_malloc(sizeof (*devidlist)); - if (!devidlist) { - return; /* oh well. */ - } - - devid = WStrDupe(devid); - if (!devid) { - SDL_free(devidlist); - return; /* oh well. */ - } - - devidlist->str = (WCHAR *) devid; - devidlist->next = deviceid_list; - deviceid_list = devidlist; - - SDL_AddAudioDevice(iscapture, devname, (void *) devid); -} - -static void -WASAPI_DetectDevices(void) -{ - WASAPI_EnumerateEndpoints(); -} - -static int -WASAPI_GetPendingBytes(_THIS) -{ - UINT32 frames = 0; - - /* it's okay to fail here; we'll deal with failures in the audio thread. */ - /* FIXME: need a lock around checking this->hidden->client */ - if (this->hidden->client != NULL) { /* definitely activated? */ - if (FAILED(IAudioClient_GetCurrentPadding(this->hidden->client, &frames))) { - return 0; /* oh well. */ - } - } - return ((int) frames) * this->hidden->framesize; -} - -static SDL_INLINE SDL_bool -WasapiFailed(_THIS, const HRESULT err) -{ - if (err == S_OK) { - return SDL_FALSE; - } - - if (err == AUDCLNT_E_DEVICE_INVALIDATED) { - this->hidden->device_lost = SDL_TRUE; - } else if (SDL_AtomicGet(&this->enabled)) { - IAudioClient_Stop(this->hidden->client); - SDL_OpenedAudioDeviceDisconnected(this); - SDL_assert(!SDL_AtomicGet(&this->enabled)); - } - - return SDL_TRUE; -} - -static int -UpdateAudioStream(_THIS, const SDL_AudioSpec *oldspec) -{ - /* Since WASAPI requires us to handle all audio conversion, and our - device format might have changed, we might have to add/remove/change - the audio stream that the higher level uses to convert data, so - SDL keeps firing the callback as if nothing happened here. */ - - if ( (this->callbackspec.channels == this->spec.channels) && - (this->callbackspec.format == this->spec.format) && - (this->callbackspec.freq == this->spec.freq) && - (this->callbackspec.samples == this->spec.samples) ) { - /* no need to buffer/convert in an AudioStream! */ - SDL_FreeAudioStream(this->stream); - this->stream = NULL; - } else if ( (oldspec->channels == this->spec.channels) && - (oldspec->format == this->spec.format) && - (oldspec->freq == this->spec.freq) ) { - /* The existing audio stream is okay to keep using. */ - } else { - /* replace the audiostream for new format */ - SDL_FreeAudioStream(this->stream); - if (this->iscapture) { - this->stream = SDL_NewAudioStream(this->spec.format, - this->spec.channels, this->spec.freq, - this->callbackspec.format, - this->callbackspec.channels, - this->callbackspec.freq); - } else { - this->stream = SDL_NewAudioStream(this->callbackspec.format, - this->callbackspec.channels, - this->callbackspec.freq, this->spec.format, - this->spec.channels, this->spec.freq); - } - - if (!this->stream) { - return -1; - } - } - - /* make sure our scratch buffer can cover the new device spec. */ - if (this->spec.size > this->work_buffer_len) { - Uint8 *ptr = (Uint8 *) SDL_realloc(this->work_buffer, this->spec.size); - if (ptr == NULL) { - return SDL_OutOfMemory(); - } - this->work_buffer = ptr; - this->work_buffer_len = this->spec.size; - } - - return 0; -} - - -static void ReleaseWasapiDevice(_THIS); - -static SDL_bool -RecoverWasapiDevice(_THIS) -{ - ReleaseWasapiDevice(this); /* dump the lost device's handles. */ - - if (this->hidden->default_device_generation) { - this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration); - } - - /* this can fail for lots of reasons, but the most likely is we had a - non-default device that was disconnected, so we can't recover. Default - devices try to reinitialize whatever the new default is, so it's more - likely to carry on here, but this handles a non-default device that - simply had its format changed in the Windows Control Panel. */ - if (WASAPI_ActivateDevice(this, SDL_TRUE) == -1) { - SDL_OpenedAudioDeviceDisconnected(this); - return SDL_FALSE; - } - - this->hidden->device_lost = SDL_FALSE; - - return SDL_TRUE; /* okay, carry on with new device details! */ -} - -static SDL_bool -RecoverWasapiIfLost(_THIS) -{ - const int generation = this->hidden->default_device_generation; - SDL_bool lost = this->hidden->device_lost; - - if (!SDL_AtomicGet(&this->enabled)) { - return SDL_FALSE; /* already failed. */ - } - - if (!this->hidden->client) { - return SDL_TRUE; /* still waiting for activation. */ - } - - if (!lost && (generation > 0)) { /* is a default device? */ - const int newgen = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration); - if (generation != newgen) { /* the desired default device was changed, jump over to it. */ - lost = SDL_TRUE; - } - } - - return lost ? RecoverWasapiDevice(this) : SDL_TRUE; -} - -static Uint8 * -WASAPI_GetDeviceBuf(_THIS) -{ - /* get an endpoint buffer from WASAPI. */ - BYTE *buffer = NULL; - - while (RecoverWasapiIfLost(this) && this->hidden->render) { - if (!WasapiFailed(this, IAudioRenderClient_GetBuffer(this->hidden->render, this->spec.samples, &buffer))) { - return (Uint8 *) buffer; - } - SDL_assert(buffer == NULL); - } - - return (Uint8 *) buffer; -} - -static void -WASAPI_PlayDevice(_THIS) -{ - if (this->hidden->render != NULL) { /* definitely activated? */ - /* WasapiFailed() will mark the device for reacquisition or removal elsewhere. */ - WasapiFailed(this, IAudioRenderClient_ReleaseBuffer(this->hidden->render, this->spec.samples, 0)); - } -} - -static void -WASAPI_WaitDevice(_THIS) -{ - while (RecoverWasapiIfLost(this) && this->hidden->client && this->hidden->event) { - /*SDL_Log("WAITDEVICE");*/ - if (WaitForSingleObjectEx(this->hidden->event, INFINITE, FALSE) == WAIT_OBJECT_0) { - const UINT32 maxpadding = this->spec.samples; - UINT32 padding = 0; - if (!WasapiFailed(this, IAudioClient_GetCurrentPadding(this->hidden->client, &padding))) { - /*SDL_Log("WASAPI EVENT! padding=%u maxpadding=%u", (unsigned int)padding, (unsigned int)maxpadding);*/ - if (padding <= maxpadding) { - break; - } - } - } else { - /*SDL_Log("WASAPI FAILED EVENT!");*/ - IAudioClient_Stop(this->hidden->client); - SDL_OpenedAudioDeviceDisconnected(this); - } - } -} - -static int -WASAPI_CaptureFromDevice(_THIS, void *buffer, int buflen) -{ - SDL_AudioStream *stream = this->hidden->capturestream; - const int avail = SDL_AudioStreamAvailable(stream); - if (avail > 0) { - const int cpy = SDL_min(buflen, avail); - SDL_AudioStreamGet(stream, buffer, cpy); - return cpy; - } - - while (RecoverWasapiIfLost(this)) { - HRESULT ret; - BYTE *ptr = NULL; - UINT32 frames = 0; - DWORD flags = 0; - - /* uhoh, client isn't activated yet, just return silence. */ - if (!this->hidden->capture) { - /* Delay so we run at about the speed that audio would be arriving. */ - SDL_Delay(((this->spec.samples * 1000) / this->spec.freq)); - SDL_memset(buffer, this->spec.silence, buflen); - return buflen; - } - - ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL); - if (ret != AUDCLNT_S_BUFFER_EMPTY) { - WasapiFailed(this, ret); /* mark device lost/failed if necessary. */ - } - - if ((ret == AUDCLNT_S_BUFFER_EMPTY) || !frames) { - WASAPI_WaitDevice(this); - } else if (ret == S_OK) { - const int total = ((int) frames) * this->hidden->framesize; - const int cpy = SDL_min(buflen, total); - const int leftover = total - cpy; - const SDL_bool silent = (flags & AUDCLNT_BUFFERFLAGS_SILENT) ? SDL_TRUE : SDL_FALSE; - - if (silent) { - SDL_memset(buffer, this->spec.silence, cpy); - } else { - SDL_memcpy(buffer, ptr, cpy); - } - - if (leftover > 0) { - ptr += cpy; - if (silent) { - SDL_memset(ptr, this->spec.silence, leftover); /* I guess this is safe? */ - } - - if (SDL_AudioStreamPut(stream, ptr, leftover) == -1) { - return -1; /* uhoh, out of memory, etc. Kill device. :( */ - } - } - - ret = IAudioCaptureClient_ReleaseBuffer(this->hidden->capture, frames); - WasapiFailed(this, ret); /* mark device lost/failed if necessary. */ - - return cpy; - } - } - - return -1; /* unrecoverable error. */ -} - -static void -WASAPI_FlushCapture(_THIS) -{ - BYTE *ptr = NULL; - UINT32 frames = 0; - DWORD flags = 0; - - if (!this->hidden->capture) { - return; /* not activated yet? */ - } - - /* just read until we stop getting packets, throwing them away. */ - while (SDL_TRUE) { - const HRESULT ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL); - if (ret == AUDCLNT_S_BUFFER_EMPTY) { - break; /* no more buffered data; we're done. */ - } else if (WasapiFailed(this, ret)) { - break; /* failed for some other reason, abort. */ - } else if (WasapiFailed(this, IAudioCaptureClient_ReleaseBuffer(this->hidden->capture, frames))) { - break; /* something broke. */ - } - } - SDL_AudioStreamClear(this->hidden->capturestream); -} - -static void -ReleaseWasapiDevice(_THIS) -{ - if (this->hidden->client) { - IAudioClient_Stop(this->hidden->client); - IAudioClient_SetEventHandle(this->hidden->client, NULL); - IAudioClient_Release(this->hidden->client); - this->hidden->client = NULL; - } - - if (this->hidden->render) { - IAudioRenderClient_Release(this->hidden->render); - this->hidden->render = NULL; - } - - if (this->hidden->capture) { - IAudioCaptureClient_Release(this->hidden->capture); - this->hidden->capture = NULL; - } - - if (this->hidden->waveformat) { - CoTaskMemFree(this->hidden->waveformat); - this->hidden->waveformat = NULL; - } - - if (this->hidden->capturestream) { - SDL_FreeAudioStream(this->hidden->capturestream); - this->hidden->capturestream = NULL; - } - - if (this->hidden->activation_handler) { - WASAPI_PlatformDeleteActivationHandler(this->hidden->activation_handler); - this->hidden->activation_handler = NULL; - } - - if (this->hidden->event) { - CloseHandle(this->hidden->event); - this->hidden->event = NULL; - } -} - -static void -WASAPI_CloseDevice(_THIS) -{ - WASAPI_UnrefDevice(this); -} - -void -WASAPI_RefDevice(_THIS) -{ - SDL_AtomicIncRef(&this->hidden->refcount); -} - -void -WASAPI_UnrefDevice(_THIS) -{ - if (!SDL_AtomicDecRef(&this->hidden->refcount)) { - return; - } - - /* actual closing happens here. */ - - /* don't touch this->hidden->task in here; it has to be reverted from - our callback thread. We do that in WASAPI_ThreadDeinit(). - (likewise for this->hidden->coinitialized). */ - ReleaseWasapiDevice(this); - SDL_free(this->hidden->devid); - SDL_free(this->hidden); -} - -/* This is called once a device is activated, possibly asynchronously. */ -int -WASAPI_PrepDevice(_THIS, const SDL_bool updatestream) -{ - /* !!! FIXME: we could request an exclusive mode stream, which is lower latency; - !!! it will write into the kernel's audio buffer directly instead of - !!! shared memory that a user-mode mixer then writes to the kernel with - !!! everything else. Doing this means any other sound using this device will - !!! stop playing, including the user's MP3 player and system notification - !!! sounds. You'd probably need to release the device when the app isn't in - !!! the foreground, to be a good citizen of the system. It's doable, but it's - !!! more work and causes some annoyances, and I don't know what the latency - !!! wins actually look like. Maybe add a hint to force exclusive mode at - !!! some point. To be sure, defaulting to shared mode is the right thing to - !!! do in any case. */ - 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; - IAudioClient *client = this->hidden->client; - IAudioRenderClient *render = NULL; - IAudioCaptureClient *capture = NULL; - WAVEFORMATEX *waveformat = NULL; - SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format); - SDL_AudioFormat wasapi_format = 0; - SDL_bool valid_format = SDL_FALSE; - HRESULT ret = S_OK; - DWORD streamflags = 0; - - SDL_assert(client != NULL); - -#ifdef __WINRT__ /* CreateEventEx() arrived in Vista, so we need an #ifdef for XP. */ - this->hidden->event = CreateEventEx(NULL, NULL, 0, EVENT_ALL_ACCESS); -#else - this->hidden->event = CreateEventW(NULL, 0, 0, NULL); -#endif - - if (this->hidden->event == NULL) { - return WIN_SetError("WASAPI can't create an event handle"); - } - - ret = IAudioClient_GetMixFormat(client, &waveformat); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't determine mix format", ret); - } - - SDL_assert(waveformat != NULL); - this->hidden->waveformat = waveformat; - - this->spec.channels = (Uint8) waveformat->nChannels; - - /* Make sure we have a valid format that we can convert to whatever WASAPI wants. */ - if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) { - wasapi_format = AUDIO_F32SYS; - } else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) { - wasapi_format = AUDIO_S16SYS; - } else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) { - wasapi_format = AUDIO_S32SYS; - } else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) { - const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *) waveformat; - if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) { - wasapi_format = AUDIO_F32SYS; - } else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 16)) { - wasapi_format = AUDIO_S16SYS; - } else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) { - wasapi_format = AUDIO_S32SYS; - } - } - - while ((!valid_format) && (test_format)) { - if (test_format == wasapi_format) { - this->spec.format = test_format; - valid_format = SDL_TRUE; - break; - } - test_format = SDL_NextAudioFormat(); - } - - if (!valid_format) { - return SDL_SetError("WASAPI: Unsupported audio format"); - } - - ret = IAudioClient_GetDevicePeriod(client, NULL, &duration); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't determine minimum device period", ret); - } - - /* favor WASAPI's resampler over our own, in Win7+. */ - if (this->spec.freq != waveformat->nSamplesPerSec) { - /* RATEADJUST only works with output devices in share mode, and is available in Win7 and later.*/ - if (WIN_IsWindows7OrGreater() && !this->iscapture && (sharemode == AUDCLNT_SHAREMODE_SHARED)) { - streamflags |= AUDCLNT_STREAMFLAGS_RATEADJUST; - waveformat->nSamplesPerSec = this->spec.freq; - waveformat->nAvgBytesPerSec = waveformat->nSamplesPerSec * waveformat->nChannels * (waveformat->wBitsPerSample / 8); - } - else { - this->spec.freq = waveformat->nSamplesPerSec; /* force sampling rate so our resampler kicks in. */ - } - } - - streamflags |= AUDCLNT_STREAMFLAGS_EVENTCALLBACK; - ret = IAudioClient_Initialize(client, sharemode, streamflags, duration, sharemode == AUDCLNT_SHAREMODE_SHARED ? 0 : duration, waveformat, NULL); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't initialize audio client", ret); - } - - ret = IAudioClient_SetEventHandle(client, this->hidden->event); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't set event handle", ret); - } - - ret = IAudioClient_GetBufferSize(client, &bufsize); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't determine buffer size", ret); - } - - this->spec.samples = (Uint16) bufsize; - if (!this->iscapture) { - this->spec.samples /= 2; /* fill half of the DMA buffer on each run. */ - } - - /* Update the fragment size as size in bytes */ - SDL_CalculateAudioSpec(&this->spec); - - this->hidden->framesize = (SDL_AUDIO_BITSIZE(this->spec.format) / 8) * this->spec.channels; - - if (this->iscapture) { - this->hidden->capturestream = SDL_NewAudioStream(this->spec.format, this->spec.channels, this->spec.freq, this->spec.format, this->spec.channels, this->spec.freq); - if (!this->hidden->capturestream) { - return -1; /* already set SDL_Error */ - } - - ret = IAudioClient_GetService(client, &SDL_IID_IAudioCaptureClient, (void**) &capture); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't get capture client service", ret); - } - - SDL_assert(capture != NULL); - this->hidden->capture = capture; - ret = IAudioClient_Start(client); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't start capture", ret); - } - - WASAPI_FlushCapture(this); /* MSDN says you should flush capture endpoint right after startup. */ - } else { - ret = IAudioClient_GetService(client, &SDL_IID_IAudioRenderClient, (void**) &render); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't get render client service", ret); - } - - SDL_assert(render != NULL); - this->hidden->render = render; - ret = IAudioClient_Start(client); - if (FAILED(ret)) { - return WIN_SetErrorFromHRESULT("WASAPI can't start playback", ret); - } - } - - if (updatestream) { - if (UpdateAudioStream(this, &oldspec) == -1) { - return -1; - } - } - - return 0; /* good to go. */ -} - - -static int -WASAPI_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) -{ - LPCWSTR devid = (LPCWSTR) handle; - - /* Initialize all variables that we clean on shutdown */ - this->hidden = (struct SDL_PrivateAudioData *) - SDL_malloc((sizeof *this->hidden)); - if (this->hidden == NULL) { - return SDL_OutOfMemory(); - } - SDL_zerop(this->hidden); - - WASAPI_RefDevice(this); /* so CloseDevice() will unref to zero. */ - - if (!devid) { /* is default device? */ - this->hidden->default_device_generation = SDL_AtomicGet(iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration); - } else { - this->hidden->devid = WStrDupe(devid); - if (!this->hidden->devid) { - return SDL_OutOfMemory(); - } - } - - if (WASAPI_ActivateDevice(this, SDL_FALSE) == -1) { - return -1; /* already set error. */ - } - - /* Ready, but waiting for async device activation. - Until activation is successful, we will report silence from capture - devices and ignore data on playback devices. - Also, since we don't know the _actual_ device format until after - activation, we let the app have whatever it asks for. We set up - an SDL_AudioStream to convert, if necessary, once the activation - completes. */ - - return 0; -} - -static void -WASAPI_ThreadInit(_THIS) -{ - WASAPI_PlatformThreadInit(this); -} - -static void -WASAPI_ThreadDeinit(_THIS) -{ - WASAPI_PlatformThreadDeinit(this); -} - -void -WASAPI_BeginLoopIteration(_THIS) -{ - /* no-op. */ -} - -static void -WASAPI_Deinitialize(void) -{ - DevIdList *devidlist; - DevIdList *next; - - WASAPI_PlatformDeinit(); - - for (devidlist = deviceid_list; devidlist; devidlist = next) { - next = devidlist->next; - SDL_free(devidlist->str); - SDL_free(devidlist); - } - deviceid_list = NULL; -} - -static int -WASAPI_Init(SDL_AudioDriverImpl * impl) -{ - SDL_AtomicSet(&WASAPI_DefaultPlaybackGeneration, 1); - SDL_AtomicSet(&WASAPI_DefaultCaptureGeneration, 1); - - if (WASAPI_PlatformInit() == -1) { - return 0; - } - - /* Set the function pointers */ - impl->DetectDevices = WASAPI_DetectDevices; - impl->ThreadInit = WASAPI_ThreadInit; - impl->ThreadDeinit = WASAPI_ThreadDeinit; - impl->BeginLoopIteration = WASAPI_BeginLoopIteration; - impl->OpenDevice = WASAPI_OpenDevice; - impl->PlayDevice = WASAPI_PlayDevice; - impl->WaitDevice = WASAPI_WaitDevice; - impl->GetPendingBytes = WASAPI_GetPendingBytes; - impl->GetDeviceBuf = WASAPI_GetDeviceBuf; - impl->CaptureFromDevice = WASAPI_CaptureFromDevice; - impl->FlushCapture = WASAPI_FlushCapture; - impl->CloseDevice = WASAPI_CloseDevice; - impl->Deinitialize = WASAPI_Deinitialize; - impl->HasCaptureSupport = 1; - - return 1; /* this audio target is available. */ -} - -AudioBootStrap WASAPI_bootstrap = { - "wasapi", "WASAPI", WASAPI_Init, 0 -}; - -#endif /* SDL_AUDIO_DRIVER_WASAPI */ - -/* vi: set ts=4 sw=4 expandtab: */ |