Add XAudio2.7 as an compile-time audio driver for vanilla Windows 7
This commit is contained in:
Lior Halphon
parent
9ae2c9fd54
commit
fd6b734fd0
131
SDL/audio/xaudio2_7.c
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131
SDL/audio/xaudio2_7.c
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#include "xaudio2_7.h"
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#include "audio.h"
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#define AUDIO_FREQUENCY 96000
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static IXAudio2 *xaudio2 = NULL;
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static IXAudio2MasteringVoice *master_voice = NULL;
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static IXAudio2SourceVoice *source_voice = NULL;
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static bool playing = false;
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static GB_sample_t sample_pool[0x2000];
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static unsigned pos = 0;
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#define BATCH_SIZE 256
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static const WAVEFORMATEX wave_format = {
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.wFormatTag = WAVE_FORMAT_PCM,
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.nChannels = 2,
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.nSamplesPerSec = AUDIO_FREQUENCY,
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.nAvgBytesPerSec = AUDIO_FREQUENCY * 4,
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.nBlockAlign = 4,
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.wBitsPerSample = 16,
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.cbSize = 0
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};
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static inline HRESULT XAudio2Create(IXAudio2 **ppXAudio2,
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UINT32 Flags,
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XAUDIO2_PROCESSOR XAudio2Processor)
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{
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IXAudio2 *pXAudio2;
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LoadLibraryEx("xaudio2_7.dll", NULL, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
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HRESULT hr = CoCreateInstance(&CLSID_XAudio2, NULL, CLSCTX_INPROC_SERVER, &IID_IXAudio2, (void**)&pXAudio2);
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if (SUCCEEDED(hr)) {
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hr = pXAudio2->lpVtbl->Initialize(pXAudio2, Flags, XAudio2Processor);
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}
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if (SUCCEEDED(hr)) {
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*ppXAudio2 = pXAudio2;
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}
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else {
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pXAudio2->lpVtbl->Release(pXAudio2);
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}
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return hr;
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}
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bool GB_audio_is_playing(void)
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{
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return playing;
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}
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void GB_audio_set_paused(bool paused)
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{
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if (paused) {
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playing = false;
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IXAudio2SourceVoice_Stop(source_voice, 0, XAUDIO2_COMMIT_NOW);
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GB_audio_clear_queue();
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}
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else {
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playing = true;
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IXAudio2SourceVoice_Start(source_voice, 0, XAUDIO2_COMMIT_NOW);
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}
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}
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void GB_audio_clear_queue(void)
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{
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pos = 0;
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IXAudio2SourceVoice_FlushSourceBuffers(source_voice);
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}
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unsigned GB_audio_get_frequency(void)
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{
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return AUDIO_FREQUENCY;
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}
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size_t GB_audio_get_queue_length(void)
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{
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static XAUDIO2_VOICE_STATE state;
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IXAudio2SourceVoice_GetState(source_voice, &state);
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return state.BuffersQueued * BATCH_SIZE + (pos & (BATCH_SIZE - 1));
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}
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void GB_audio_queue_sample(GB_sample_t *sample)
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{
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if (!playing) return;
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static XAUDIO2_BUFFER buffer = {.AudioBytes = sizeof(*sample) * BATCH_SIZE, };
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sample_pool[pos] = *sample;
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buffer.pAudioData = (void *)&sample_pool[pos & ~(BATCH_SIZE - 1)];
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pos++;
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pos &= 0x1fff;
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if ((pos & (BATCH_SIZE - 1)) == 0) {
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IXAudio2SourceVoice_SubmitSourceBuffer(source_voice, &buffer, NULL);
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}
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}
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void GB_audio_init(void)
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{
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HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
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if (FAILED(hr)) {
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fprintf(stderr, "CoInitializeEx failed: %lx\n", hr);
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return;
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}
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hr = XAudio2Create(&xaudio2, 0, XAUDIO2_DEFAULT_PROCESSOR);
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if (FAILED(hr)) {
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fprintf(stderr, "XAudio2Create failed: %lx\n", hr);
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return;
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}
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hr = IXAudio2_CreateMasteringVoice(xaudio2, &master_voice,
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2, // 2 channels
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AUDIO_FREQUENCY,
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0, // Flags
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0, // Device index
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NULL // Effect chain
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);
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if (FAILED(hr)) {
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fprintf(stderr, "CreateMasteringVoice failed: %lx\n", hr);
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return;
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}
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hr = IXAudio2_CreateSourceVoice(xaudio2, &source_voice, &wave_format, 0, XAUDIO2_DEFAULT_FREQ_RATIO, NULL, NULL, NULL);
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if (FAILED(hr)) {
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fprintf(stderr, "CreateSourceVoice failed: %lx\n", hr);
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return;
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}
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}
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103
SDL/audio/xaudio2_7.h
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103
SDL/audio/xaudio2_7.h
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#define INITGUID
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#include <Windows.h>
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/* Minimal definitions for XAudio2.7 */
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typedef UINT32 XAUDIO2_PROCESSOR;
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typedef struct XAUDIO2_BUFFER {
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UINT32 Flags;
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UINT32 AudioBytes;
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const BYTE *pAudioData;
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UINT32 PlayBegin;
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UINT32 PlayLength;
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UINT32 LoopBegin;
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UINT32 LoopLength;
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UINT32 LoopCount;
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void *pContext;
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} XAUDIO2_BUFFER;
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typedef struct XAUDIO2_VOICE_STATE {
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void *pCurrentBufferContext;
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UINT32 BuffersQueued;
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UINT64 SamplesPlayed;
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} XAUDIO2_VOICE_STATE;
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typedef struct IXAudio2SourceVoice {
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struct IXAudio2SourceVoiceVtbl *lpVtbl;
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} IXAudio2SourceVoice;
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typedef struct IXAudio2SourceVoiceVtbl IXAudio2SourceVoiceVtbl;
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#undef INTERFACE
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#define INTERFACE IXAudio2SourceVoice
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struct IXAudio2SourceVoiceVtbl {
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void *voiceMethods[19]; // Unused inherited methods
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STDMETHOD(Start) (THIS_ UINT32 Flags, UINT32 OperationSet) PURE;
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STDMETHOD(Stop) (THIS_ UINT32 Flags, UINT32 OperationSet) PURE;
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STDMETHOD(SubmitSourceBuffer) (THIS_ __in const XAUDIO2_BUFFER *pBuffer, __in_opt const void *pBufferWMA) PURE;
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STDMETHOD(FlushSourceBuffers) (THIS) PURE;
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STDMETHOD(Discontinuity) (THIS) PURE;
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STDMETHOD(ExitLoop) (THIS_ UINT32 OperationSet) PURE;
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STDMETHOD_(void, GetState) (THIS_ __out XAUDIO2_VOICE_STATE *pVoiceState) PURE;
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};
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typedef struct IXAudio2 {
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struct IXAudio2Vtbl *lpVtbl;
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} IXAudio2;
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typedef struct IXAudio2Vtbl IXAudio2Vtbl;
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typedef void *IXAudio2MasteringVoice;
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#undef INTERFACE
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#define INTERFACE IXAudio2
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struct IXAudio2Vtbl {
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void *QueryInterface;
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STDMETHOD_(ULONG, AddRef) (THIS) PURE;
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STDMETHOD_(ULONG, Release) (THIS) PURE;
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void *GetDeviceCount;
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void *GetDeviceDetails;
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STDMETHOD(Initialize) (THIS_ UINT32 Flags,
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XAUDIO2_PROCESSOR XAudio2Processor) PURE;
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void *RegisterForCallbacks;
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void *UnregisterForCallbacks;
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STDMETHOD(CreateSourceVoice) (THIS_ __deref_out IXAudio2SourceVoice **ppSourceVoice,
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__in const WAVEFORMATEX *pSourceFormat,
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UINT32 Flags,
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float MaxFrequencyRatio,
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__in_opt void *pCallback,
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__in_opt const void *pSendList,
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__in_opt const void *pEffectChain) PURE;
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void *CreateSubmixVoice;
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STDMETHOD(CreateMasteringVoice) (THIS_ __deref_out IXAudio2MasteringVoice **ppMasteringVoice,
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UINT32 InputChannels,
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UINT32 InputSampleRate,
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UINT32 Flags, UINT32 DeviceIndex,
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__in_opt const void *pEffectChain) PURE;
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};
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#define DEFINE_CLSID(className, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
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DEFINE_GUID(CLSID_##className, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)
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#define DEFINE_IID(interfaceName, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
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DEFINE_GUID(IID_##interfaceName, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)
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DEFINE_CLSID(XAudio2, 5a508685, a254, 4fba, 9b, 82, 9a, 24, b0, 03, 06, af);
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DEFINE_IID(IXAudio2, 8bcf1f58, 9fe7, 4583, 8a, c6, e2, ad, c4, 65, c8, bb);
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#define IXAudio2SourceVoice_Start(This,Flags,OperationSet) ((This)->lpVtbl->Start(This,Flags,OperationSet))
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#define IXAudio2SourceVoice_Stop(This,Flags,OperationSet) ((This)->lpVtbl->Stop(This,Flags,OperationSet))
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#define IXAudio2SourceVoice_SubmitSourceBuffer(This,pBuffer,pBufferWMA) ((This)->lpVtbl->SubmitSourceBuffer(This,pBuffer,pBufferWMA))
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#define IXAudio2SourceVoice_FlushSourceBuffers(This) ((This)->lpVtbl->FlushSourceBuffers(This))
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#define IXAudio2SourceVoice_GetState(This,pVoiceState) ((This)->lpVtbl->GetState(This,pVoiceState))
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#define IXAudio2_CreateMasteringVoice(This,ppMasteringVoice,InputChannels,InputSampleRate,Flags,DeviceIndex,pEffectChain) ((This)->lpVtbl->CreateMasteringVoice(This,ppMasteringVoice,InputChannels,InputSampleRate,Flags,DeviceIndex,pEffectChain))
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#define IXAudio2_CreateSourceVoice(This,ppSourceVoice,pSourceFormat,Flags,MaxFrequencyRatio,pCallback,pSendList,pEffectChain) ((This)->lpVtbl->CreateSourceVoice(This,ppSourceVoice,pSourceFormat,Flags,MaxFrequencyRatio,pCallback,pSendList,pEffectChain))
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#define XAUDIO2_COMMIT_NOW 0
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#define XAUDIO2_DEFAULT_PROCESSOR 0xffffffff
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#define XAUDIO2_DEFAULT_FREQ_RATIO 2.0f
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