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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

--HG--
extra : amend_source : a28a9a9fbb09c4c25df05fa0a754fce0bee62335
extra : histedit_source : e5727ceb1a5db5806ce02534d8ffe4892eb6f5d9
This commit is contained in:
Ryan C. Gordon 2017-12-06 12:24:32 -05:00
parent 8b08b7b07b
commit 1745441419
30 changed files with 958 additions and 1518 deletions
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2
src/SDL_internal.h
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@ -29,7 +29,7 @@
/* This is for a variable-length array at the end of a struct:
struct x { int y; char z[SDL_VARIABLE_LENGTH_ARRAY]; };
Use this because GCC 2 needs different magic than other compilers. */
#if (defined(__GNUC__) && (__GNUC__ <= 2)) || defined(__CC_ARM)
#if (defined(__GNUC__) && (__GNUC__ <= 2)) || defined(__CC_ARM) || defined(__cplusplus)
#define SDL_VARIABLE_LENGTH_ARRAY 1
#else
#define SDL_VARIABLE_LENGTH_ARRAY