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audio: Port WASAPI to WinRT, remove XAudio2 backend.

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XAudio2 doesn't have capture support, so WASAPI was to replace it; the holdout
was WinRT, which still needed it as its primary audio target until the WASAPI
code code be made to work.

The support matrix now looks like:

WinXP: directsound by default, winmm as a fallback for buggy drivers.
Vista+: WASAPI (directsound and winmm as fallbacks for debugging).
WinRT: WASAPI
This commit is contained in:
Ryan C. Gordon
2017-12-06 12:24:32 -05:00
parent 083fe066d5
commit 351d6d4784
30 changed files with 958 additions and 1518 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
src/audio/wasapi/SDL_wasapi.h
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@@ -23,14 +23,23 @@
#ifndef SDL_wasapi_h_
#define SDL_wasapi_h_
#ifdef __cplusplus
extern "C" {
#endif
#include "../SDL_sysaudio.h"
/* Hidden "this" pointer for the audio functions */
#ifdef __cplusplus
#define _THIS SDL_AudioDevice *_this
#else
#define _THIS SDL_AudioDevice *this
#endif
struct SDL_PrivateAudioData
{
IMMDevice *device;
SDL_atomic_t refcount;
WCHAR *devid;
WAVEFORMATEX *waveformat;
IAudioClient *client;
IAudioRenderClient *render;
@@ -41,8 +50,35 @@ struct SDL_PrivateAudioData
int framesize;
int default_device_generation;
SDL_bool device_lost;
void *activation_handler;
SDL_atomic_t just_activated;
};
/* these increment as default devices change. Opened default devices pick up changes in their threads. */
extern SDL_atomic_t WASAPI_DefaultPlaybackGeneration;
extern SDL_atomic_t WASAPI_DefaultCaptureGeneration;
/* win32 and winrt implementations call into these. */
int WASAPI_PrepDevice(_THIS, const SDL_bool updatestream);
void WASAPI_RefDevice(_THIS);
void WASAPI_UnrefDevice(_THIS);
void WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid);
void WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid);
/* These are functions that are implemented differently for Windows vs WinRT. */
int WASAPI_PlatformInit(void);
void WASAPI_PlatformDeinit(void);
void WASAPI_EnumerateEndpoints(void);
int WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery);
void WASAPI_PlatformThreadInit(_THIS);
void WASAPI_PlatformThreadDeinit(_THIS);
void WASAPI_PlatformDeleteActivationHandler(void *handler);
void WASAPI_BeginLoopIteration(_THIS);
#ifdef __cplusplus
}
#endif
#endif /* SDL_wasapi_h_ */
/* vi: set ts=4 sw=4 expandtab: */