656 lines
23 KiB
C
656 lines
23 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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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_DSOUND
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/* Allow access to a raw mixing buffer */
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#include "../SDL_audio_c.h"
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#include "SDL_directsound.h"
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#include <mmreg.h>
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#if HAVE_MMDEVICEAPI_H
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#include "../../core/windows/SDL_immdevice.h"
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#endif /* HAVE_MMDEVICEAPI_H */
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#ifndef WAVE_FORMAT_IEEE_FLOAT
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#define WAVE_FORMAT_IEEE_FLOAT 0x0003
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#endif
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/* For Vista+, we can enumerate DSound devices with IMMDevice */
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#if HAVE_MMDEVICEAPI_H
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static SDL_bool SupportsIMMDevice = SDL_FALSE;
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#endif /* HAVE_MMDEVICEAPI_H */
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/* DirectX function pointers for audio */
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static void *DSoundDLL = NULL;
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typedef HRESULT(WINAPI *fnDirectSoundCreate8)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
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typedef HRESULT(WINAPI *fnDirectSoundEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
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typedef HRESULT(WINAPI *fnDirectSoundCaptureCreate8)(LPCGUID, LPDIRECTSOUNDCAPTURE8 *, LPUNKNOWN);
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typedef HRESULT(WINAPI *fnDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
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static fnDirectSoundCreate8 pDirectSoundCreate8 = NULL;
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static fnDirectSoundEnumerateW pDirectSoundEnumerateW = NULL;
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static fnDirectSoundCaptureCreate8 pDirectSoundCaptureCreate8 = NULL;
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static fnDirectSoundCaptureEnumerateW pDirectSoundCaptureEnumerateW = NULL;
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static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
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static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
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static void DSOUND_Unload(void)
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{
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pDirectSoundCreate8 = NULL;
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pDirectSoundEnumerateW = NULL;
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pDirectSoundCaptureCreate8 = NULL;
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pDirectSoundCaptureEnumerateW = NULL;
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if (DSoundDLL != NULL) {
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SDL_UnloadObject(DSoundDLL);
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DSoundDLL = NULL;
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}
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}
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static int DSOUND_Load(void)
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{
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int loaded = 0;
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DSOUND_Unload();
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DSoundDLL = SDL_LoadObject("DSOUND.DLL");
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if (DSoundDLL == NULL) {
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SDL_SetError("DirectSound: failed to load DSOUND.DLL");
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} else {
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/* Now make sure we have DirectX 8 or better... */
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#define DSOUNDLOAD(f) \
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{ \
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p##f = (fn##f)SDL_LoadFunction(DSoundDLL, #f); \
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if (!p##f) \
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loaded = 0; \
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}
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loaded = 1; /* will reset if necessary. */
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DSOUNDLOAD(DirectSoundCreate8);
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DSOUNDLOAD(DirectSoundEnumerateW);
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DSOUNDLOAD(DirectSoundCaptureCreate8);
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DSOUNDLOAD(DirectSoundCaptureEnumerateW);
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#undef DSOUNDLOAD
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if (!loaded) {
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SDL_SetError("DirectSound: System doesn't appear to have DX8.");
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}
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}
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if (!loaded) {
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DSOUND_Unload();
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}
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return loaded;
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}
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static int SetDSerror(const char *function, int code)
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{
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const char *error;
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switch (code) {
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case E_NOINTERFACE:
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error = "Unsupported interface -- Is DirectX 8.0 or later installed?";
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break;
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case DSERR_ALLOCATED:
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error = "Audio device in use";
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break;
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case DSERR_BADFORMAT:
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error = "Unsupported audio format";
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break;
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case DSERR_BUFFERLOST:
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error = "Mixing buffer was lost";
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break;
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case DSERR_CONTROLUNAVAIL:
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error = "Control requested is not available";
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break;
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case DSERR_INVALIDCALL:
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error = "Invalid call for the current state";
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break;
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case DSERR_INVALIDPARAM:
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error = "Invalid parameter";
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break;
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case DSERR_NODRIVER:
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error = "No audio device found";
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break;
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case DSERR_OUTOFMEMORY:
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error = "Out of memory";
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break;
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case DSERR_PRIOLEVELNEEDED:
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error = "Caller doesn't have priority";
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break;
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case DSERR_UNSUPPORTED:
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error = "Function not supported";
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break;
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default:
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error = "Unknown DirectSound error";
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break;
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}
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return SDL_SetError("%s: %s (0x%x)", function, error, code);
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}
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static void DSOUND_FreeDeviceHandle(void *handle)
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{
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SDL_free(handle);
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}
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static int DSOUND_GetDefaultAudioInfo(char **name, SDL_AudioSpec *spec, int iscapture)
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{
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#if HAVE_MMDEVICEAPI_H
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if (SupportsIMMDevice) {
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return SDL_IMMDevice_GetDefaultAudioInfo(name, spec, iscapture);
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}
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#endif /* HAVE_MMDEVICEAPI_H */
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return SDL_Unsupported();
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}
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static BOOL CALLBACK FindAllDevs(LPGUID guid, LPCWSTR desc, LPCWSTR module, LPVOID data)
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{
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const int iscapture = (int)((size_t)data);
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if (guid != NULL) { /* skip default device */
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char *str = WIN_LookupAudioDeviceName(desc, guid);
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if (str != NULL) {
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LPGUID cpyguid = (LPGUID)SDL_malloc(sizeof(GUID));
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SDL_memcpy(cpyguid, guid, sizeof(GUID));
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/* Note that spec is NULL, because we are required to connect to the
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* device before getting the channel mask and output format, making
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* this information inaccessible at enumeration time
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*/
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SDL_AddAudioDevice(iscapture, str, NULL, cpyguid);
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SDL_free(str); /* addfn() makes a copy of this string. */
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}
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}
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return TRUE; /* keep enumerating. */
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}
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static void DSOUND_DetectDevices(void)
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{
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#if HAVE_MMDEVICEAPI_H
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if (SupportsIMMDevice) {
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SDL_IMMDevice_EnumerateEndpoints(SDL_TRUE);
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} else {
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#endif /* HAVE_MMDEVICEAPI_H */
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pDirectSoundCaptureEnumerateW(FindAllDevs, (void *)((size_t)1));
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pDirectSoundEnumerateW(FindAllDevs, (void *)((size_t)0));
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#if HAVE_MMDEVICEAPI_H
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}
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#endif /* HAVE_MMDEVICEAPI_H*/
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}
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static void DSOUND_WaitDevice(_THIS)
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{
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DWORD status = 0;
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DWORD cursor = 0;
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DWORD junk = 0;
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HRESULT result = DS_OK;
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/* Semi-busy wait, since we have no way of getting play notification
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on a primary mixing buffer located in hardware (DirectX 5.0)
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*/
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result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
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&junk, &cursor);
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if (result != DS_OK) {
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if (result == DSERR_BUFFERLOST) {
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IDirectSoundBuffer_Restore(this->hidden->mixbuf);
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}
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#ifdef DEBUG_SOUND
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SetDSerror("DirectSound GetCurrentPosition", result);
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#endif
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return;
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}
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while ((cursor / this->spec.size) == this->hidden->lastchunk) {
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/* FIXME: find out how much time is left and sleep that long */
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SDL_Delay(1);
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/* Try to restore a lost sound buffer */
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IDirectSoundBuffer_GetStatus(this->hidden->mixbuf, &status);
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if (status & DSBSTATUS_BUFFERLOST) {
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IDirectSoundBuffer_Restore(this->hidden->mixbuf);
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IDirectSoundBuffer_GetStatus(this->hidden->mixbuf, &status);
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if (status & DSBSTATUS_BUFFERLOST) {
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break;
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}
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}
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if (!(status & DSBSTATUS_PLAYING)) {
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result = IDirectSoundBuffer_Play(this->hidden->mixbuf, 0, 0,
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DSBPLAY_LOOPING);
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if (result == DS_OK) {
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continue;
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}
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#ifdef DEBUG_SOUND
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SetDSerror("DirectSound Play", result);
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#endif
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return;
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}
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/* Find out where we are playing */
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result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
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&junk, &cursor);
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if (result != DS_OK) {
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SetDSerror("DirectSound GetCurrentPosition", result);
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return;
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}
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}
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}
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static void DSOUND_PlayDevice(_THIS)
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{
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/* Unlock the buffer, allowing it to play */
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if (this->hidden->locked_buf) {
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IDirectSoundBuffer_Unlock(this->hidden->mixbuf,
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this->hidden->locked_buf,
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this->spec.size, NULL, 0);
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}
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}
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static Uint8 *DSOUND_GetDeviceBuf(_THIS)
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{
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DWORD cursor = 0;
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DWORD junk = 0;
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HRESULT result = DS_OK;
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DWORD rawlen = 0;
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/* Figure out which blocks to fill next */
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this->hidden->locked_buf = NULL;
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result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
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&junk, &cursor);
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if (result == DSERR_BUFFERLOST) {
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IDirectSoundBuffer_Restore(this->hidden->mixbuf);
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result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
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&junk, &cursor);
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}
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if (result != DS_OK) {
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SetDSerror("DirectSound GetCurrentPosition", result);
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return NULL;
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}
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cursor /= this->spec.size;
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#ifdef DEBUG_SOUND
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/* Detect audio dropouts */
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{
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DWORD spot = cursor;
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if (spot < this->hidden->lastchunk) {
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spot += this->hidden->num_buffers;
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}
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if (spot > this->hidden->lastchunk + 1) {
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fprintf(stderr, "Audio dropout, missed %d fragments\n",
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(spot - (this->hidden->lastchunk + 1)));
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}
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}
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#endif
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this->hidden->lastchunk = cursor;
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cursor = (cursor + 1) % this->hidden->num_buffers;
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cursor *= this->spec.size;
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/* Lock the audio buffer */
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result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor,
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this->spec.size,
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(LPVOID *)&this->hidden->locked_buf,
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&rawlen, NULL, &junk, 0);
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if (result == DSERR_BUFFERLOST) {
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IDirectSoundBuffer_Restore(this->hidden->mixbuf);
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result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor,
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this->spec.size,
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(LPVOID *)&this->hidden->locked_buf, &rawlen, NULL,
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&junk, 0);
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}
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if (result != DS_OK) {
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SetDSerror("DirectSound Lock", result);
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return NULL;
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}
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return this->hidden->locked_buf;
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}
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static int DSOUND_CaptureFromDevice(_THIS, void *buffer, int buflen)
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{
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struct SDL_PrivateAudioData *h = this->hidden;
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DWORD junk, cursor, ptr1len, ptr2len;
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VOID *ptr1, *ptr2;
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SDL_assert(buflen == this->spec.size);
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while (SDL_TRUE) {
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if (SDL_AtomicGet(&this->shutdown)) { /* in case the buffer froze... */
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SDL_memset(buffer, this->spec.silence, buflen);
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return buflen;
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}
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if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) != DS_OK) {
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return -1;
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}
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if ((cursor / this->spec.size) == h->lastchunk) {
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SDL_Delay(1); /* FIXME: find out how much time is left and sleep that long */
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} else {
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break;
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}
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}
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if (IDirectSoundCaptureBuffer_Lock(h->capturebuf, h->lastchunk * this->spec.size, this->spec.size, &ptr1, &ptr1len, &ptr2, &ptr2len, 0) != DS_OK) {
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return -1;
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}
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SDL_assert(ptr1len == this->spec.size);
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SDL_assert(ptr2 == NULL);
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SDL_assert(ptr2len == 0);
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SDL_memcpy(buffer, ptr1, ptr1len);
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if (IDirectSoundCaptureBuffer_Unlock(h->capturebuf, ptr1, ptr1len, ptr2, ptr2len) != DS_OK) {
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return -1;
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}
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h->lastchunk = (h->lastchunk + 1) % h->num_buffers;
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return ptr1len;
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}
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static void DSOUND_FlushCapture(_THIS)
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{
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struct SDL_PrivateAudioData *h = this->hidden;
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DWORD junk, cursor;
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if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) == DS_OK) {
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h->lastchunk = cursor / this->spec.size;
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}
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}
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static void DSOUND_CloseDevice(_THIS)
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{
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if (this->hidden->mixbuf != NULL) {
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IDirectSoundBuffer_Stop(this->hidden->mixbuf);
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IDirectSoundBuffer_Release(this->hidden->mixbuf);
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}
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if (this->hidden->sound != NULL) {
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IDirectSound_Release(this->hidden->sound);
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}
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if (this->hidden->capturebuf != NULL) {
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IDirectSoundCaptureBuffer_Stop(this->hidden->capturebuf);
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IDirectSoundCaptureBuffer_Release(this->hidden->capturebuf);
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}
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if (this->hidden->capture != NULL) {
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IDirectSoundCapture_Release(this->hidden->capture);
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}
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SDL_free(this->hidden);
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}
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/* This function tries to create a secondary audio buffer, and returns the
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number of audio chunks available in the created buffer. This is for
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playback devices, not capture.
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*/
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static int CreateSecondary(_THIS, const DWORD bufsize, WAVEFORMATEX *wfmt)
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{
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LPDIRECTSOUND sndObj = this->hidden->sound;
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LPDIRECTSOUNDBUFFER *sndbuf = &this->hidden->mixbuf;
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HRESULT result = DS_OK;
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DSBUFFERDESC format;
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LPVOID pvAudioPtr1, pvAudioPtr2;
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DWORD dwAudioBytes1, dwAudioBytes2;
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/* Try to create the secondary buffer */
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SDL_zero(format);
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format.dwSize = sizeof(format);
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format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
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format.dwFlags |= DSBCAPS_GLOBALFOCUS;
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format.dwBufferBytes = bufsize;
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format.lpwfxFormat = wfmt;
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result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
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if (result != DS_OK) {
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return SetDSerror("DirectSound CreateSoundBuffer", result);
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}
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IDirectSoundBuffer_SetFormat(*sndbuf, wfmt);
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/* Silence the initial audio buffer */
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result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
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(LPVOID *)&pvAudioPtr1, &dwAudioBytes1,
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(LPVOID *)&pvAudioPtr2, &dwAudioBytes2,
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DSBLOCK_ENTIREBUFFER);
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if (result == DS_OK) {
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SDL_memset(pvAudioPtr1, this->spec.silence, dwAudioBytes1);
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IDirectSoundBuffer_Unlock(*sndbuf,
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(LPVOID)pvAudioPtr1, dwAudioBytes1,
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(LPVOID)pvAudioPtr2, dwAudioBytes2);
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}
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/* We're ready to go */
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return 0;
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}
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/* This function tries to create a capture buffer, and returns the
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number of audio chunks available in the created buffer. This is for
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capture devices, not playback.
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*/
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static int CreateCaptureBuffer(_THIS, const DWORD bufsize, WAVEFORMATEX *wfmt)
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{
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LPDIRECTSOUNDCAPTURE capture = this->hidden->capture;
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LPDIRECTSOUNDCAPTUREBUFFER *capturebuf = &this->hidden->capturebuf;
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DSCBUFFERDESC format;
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HRESULT result;
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SDL_zero(format);
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format.dwSize = sizeof(format);
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format.dwFlags = DSCBCAPS_WAVEMAPPED;
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format.dwBufferBytes = bufsize;
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format.lpwfxFormat = wfmt;
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result = IDirectSoundCapture_CreateCaptureBuffer(capture, &format, capturebuf, NULL);
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if (result != DS_OK) {
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return SetDSerror("DirectSound CreateCaptureBuffer", result);
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}
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result = IDirectSoundCaptureBuffer_Start(*capturebuf, DSCBSTART_LOOPING);
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if (result != DS_OK) {
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IDirectSoundCaptureBuffer_Release(*capturebuf);
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return SetDSerror("DirectSound Start", result);
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}
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#if 0
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/* presumably this starts at zero, but just in case... */
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result = IDirectSoundCaptureBuffer_GetCurrentPosition(*capturebuf, &junk, &cursor);
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if (result != DS_OK) {
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IDirectSoundCaptureBuffer_Stop(*capturebuf);
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IDirectSoundCaptureBuffer_Release(*capturebuf);
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return SetDSerror("DirectSound GetCurrentPosition", result);
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}
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this->hidden->lastchunk = cursor / this->spec.size;
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#endif
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return 0;
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}
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static int DSOUND_OpenDevice(_THIS, const char *devname)
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{
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const DWORD numchunks = 8;
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HRESULT result;
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SDL_bool tried_format = SDL_FALSE;
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SDL_bool iscapture = this->iscapture;
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SDL_AudioFormat test_format;
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LPGUID guid = (LPGUID)this->handle;
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DWORD bufsize;
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/* Initialize all variables that we clean on shutdown */
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this->hidden = (struct SDL_PrivateAudioData *)
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SDL_malloc((sizeof *this->hidden));
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if (this->hidden == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_zerop(this->hidden);
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/* Open the audio device */
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if (iscapture) {
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result = pDirectSoundCaptureCreate8(guid, &this->hidden->capture, NULL);
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if (result != DS_OK) {
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return SetDSerror("DirectSoundCaptureCreate8", result);
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}
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} else {
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result = pDirectSoundCreate8(guid, &this->hidden->sound, NULL);
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|
if (result != DS_OK) {
|
|
return SetDSerror("DirectSoundCreate8", result);
|
|
}
|
|
result = IDirectSound_SetCooperativeLevel(this->hidden->sound,
|
|
GetDesktopWindow(),
|
|
DSSCL_NORMAL);
|
|
if (result != DS_OK) {
|
|
return SetDSerror("DirectSound SetCooperativeLevel", result);
|
|
}
|
|
}
|
|
|
|
for (test_format = SDL_GetFirstAudioFormat(this->spec.format); test_format; test_format = SDL_GetNextAudioFormat()) {
|
|
switch (test_format) {
|
|
case AUDIO_U8:
|
|
case AUDIO_S16:
|
|
case AUDIO_S32:
|
|
case AUDIO_F32:
|
|
tried_format = SDL_TRUE;
|
|
|
|
this->spec.format = test_format;
|
|
|
|
/* Update the fragment size as size in bytes */
|
|
SDL_CalculateAudioSpec(&this->spec);
|
|
|
|
bufsize = numchunks * this->spec.size;
|
|
if ((bufsize < DSBSIZE_MIN) || (bufsize > DSBSIZE_MAX)) {
|
|
SDL_SetError("Sound buffer size must be between %d and %d",
|
|
(int)((DSBSIZE_MIN < numchunks) ? 1 : DSBSIZE_MIN / numchunks),
|
|
(int)(DSBSIZE_MAX / numchunks));
|
|
} else {
|
|
int rc;
|
|
WAVEFORMATEXTENSIBLE wfmt;
|
|
SDL_zero(wfmt);
|
|
if (this->spec.channels > 2) {
|
|
wfmt.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
|
|
wfmt.Format.cbSize = sizeof(wfmt) - sizeof(WAVEFORMATEX);
|
|
|
|
if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
|
|
SDL_memcpy(&wfmt.SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof(GUID));
|
|
} else {
|
|
SDL_memcpy(&wfmt.SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID));
|
|
}
|
|
wfmt.Samples.wValidBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
|
|
|
|
switch (this->spec.channels) {
|
|
case 3: /* 3.0 (or 2.1) */
|
|
wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER;
|
|
break;
|
|
case 4: /* 4.0 */
|
|
wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
|
|
break;
|
|
case 5: /* 5.0 (or 4.1) */
|
|
wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
|
|
break;
|
|
case 6: /* 5.1 */
|
|
wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT;
|
|
break;
|
|
case 7: /* 6.1 */
|
|
wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_BACK_CENTER;
|
|
break;
|
|
case 8: /* 7.1 */
|
|
wfmt.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT;
|
|
break;
|
|
default:
|
|
SDL_assert(0 && "Unsupported channel count!");
|
|
break;
|
|
}
|
|
} else if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
|
|
wfmt.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
|
|
} else {
|
|
wfmt.Format.wFormatTag = WAVE_FORMAT_PCM;
|
|
}
|
|
|
|
wfmt.Format.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
|
|
wfmt.Format.nChannels = this->spec.channels;
|
|
wfmt.Format.nSamplesPerSec = this->spec.freq;
|
|
wfmt.Format.nBlockAlign = wfmt.Format.nChannels * (wfmt.Format.wBitsPerSample / 8);
|
|
wfmt.Format.nAvgBytesPerSec = wfmt.Format.nSamplesPerSec * wfmt.Format.nBlockAlign;
|
|
|
|
rc = iscapture ? CreateCaptureBuffer(this, bufsize, (WAVEFORMATEX *)&wfmt) : CreateSecondary(this, bufsize, (WAVEFORMATEX *)&wfmt);
|
|
if (rc == 0) {
|
|
this->hidden->num_buffers = numchunks;
|
|
break;
|
|
}
|
|
}
|
|
continue;
|
|
default:
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!test_format) {
|
|
if (tried_format) {
|
|
return -1; /* CreateSecondary() should have called SDL_SetError(). */
|
|
}
|
|
return SDL_SetError("%s: Unsupported audio format", "directsound");
|
|
}
|
|
|
|
/* Playback buffers will auto-start playing in DSOUND_WaitDevice() */
|
|
|
|
return 0; /* good to go. */
|
|
}
|
|
|
|
static void DSOUND_Deinitialize(void)
|
|
{
|
|
#if HAVE_MMDEVICEAPI_H
|
|
if (SupportsIMMDevice) {
|
|
SDL_IMMDevice_Quit();
|
|
SupportsIMMDevice = SDL_FALSE;
|
|
}
|
|
#endif /* HAVE_MMDEVICEAPI_H */
|
|
DSOUND_Unload();
|
|
}
|
|
|
|
static SDL_bool DSOUND_Init(SDL_AudioDriverImpl *impl)
|
|
{
|
|
if (!DSOUND_Load()) {
|
|
return SDL_FALSE;
|
|
}
|
|
|
|
#if HAVE_MMDEVICEAPI_H
|
|
SupportsIMMDevice = !(SDL_IMMDevice_Init() < 0);
|
|
#endif /* HAVE_MMDEVICEAPI_H */
|
|
|
|
/* Set the function pointers */
|
|
impl->DetectDevices = DSOUND_DetectDevices;
|
|
impl->OpenDevice = DSOUND_OpenDevice;
|
|
impl->PlayDevice = DSOUND_PlayDevice;
|
|
impl->WaitDevice = DSOUND_WaitDevice;
|
|
impl->GetDeviceBuf = DSOUND_GetDeviceBuf;
|
|
impl->CaptureFromDevice = DSOUND_CaptureFromDevice;
|
|
impl->FlushCapture = DSOUND_FlushCapture;
|
|
impl->CloseDevice = DSOUND_CloseDevice;
|
|
impl->FreeDeviceHandle = DSOUND_FreeDeviceHandle;
|
|
impl->Deinitialize = DSOUND_Deinitialize;
|
|
impl->GetDefaultAudioInfo = DSOUND_GetDefaultAudioInfo;
|
|
|
|
impl->HasCaptureSupport = SDL_TRUE;
|
|
impl->SupportsNonPow2Samples = SDL_TRUE;
|
|
|
|
return SDL_TRUE; /* this audio target is available. */
|
|
}
|
|
|
|
AudioBootStrap DSOUND_bootstrap = {
|
|
"directsound", "DirectSound", DSOUND_Init, SDL_FALSE
|
|
};
|
|
|
|
#endif /* SDL_AUDIO_DRIVER_DSOUND */
|