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#include "wasapiout.h"
//#include "srcloader.h"
#include <windows.h>
#include <mmdeviceapi.h>
#include <audioclient.h>
enum {
SRCBUFFRAMES = 256,
};
struct wasapi_state {
struct sound_state soundout;
IAudioClient *ac;
IAudioRenderClient *rc;
HANDLE t_update;
HANDLE e_update;
HANDLE mtx_cbproc;
sound_callback cbfunc;
void *userptr;
int16_t *buf_i;
float *buf_f;
// SRC_STATE *src;
DWORD terminate;
DWORD paused;
unsigned buf_frames;
unsigned buf_used_frames;
UINT32 wasapi_buf_frames;
// unsigned srate;
// double src_ratio;
};
static DWORD CALLBACK bufupdatethread(void *p) {
struct wasapi_state *wasapiout = (struct wasapi_state *)p;
for (;;) {
WaitForSingleObject(wasapiout->e_update, INFINITE);
if (wasapiout->terminate) ExitThread(0);
int16_t *outbuf;
while (SUCCEEDED(wasapiout->rc->lpVtbl->GetBuffer(wasapiout->rc,
wasapiout->wasapi_buf_frames, (BYTE **)&outbuf))) {
int silence = 1;
if (WaitForSingleObject(wasapiout->mtx_cbproc, 0) == WAIT_OBJECT_0) {
if (!wasapiout->paused) {
silence = 0;
/*
ZeroMemory(wasapiout->buf_i, wasapiout->wasapi_buf_frames*4);
wasapiout->cbfunc(
wasapiout->userptr,
wasapiout->buf_i,
wasapiout->wasapi_buf_frames);
*/
ZeroMemory(wasapiout->buf_i, wasapiout->wasapi_buf_frames*4);
wasapiout->cbfunc(
wasapiout->userptr,
outbuf,
wasapiout->wasapi_buf_frames);
}
ReleaseMutex(wasapiout->mtx_cbproc);
}
if (!silence) {
//g_src.src_short_to_float_array(wasapiout->buf_i, outbuf, wasapiout->wasapi_buf_frames*2);
}
wasapiout->rc->lpVtbl->ReleaseBuffer(wasapiout->rc,
wasapiout->wasapi_buf_frames,
silence ? AUDCLNT_BUFFERFLAGS_SILENT : 0);
}
}
}
static void wasapi_pause(struct sound_state *state, int pause) {
struct wasapi_state *wasapiout = (struct wasapi_state *)state;
if (pause) {
//wasapiout->ac->lpVtbl->Stop(wasapiout->ac);
WaitForSingleObject(wasapiout->mtx_cbproc, INFINITE);
wasapiout->paused = 1;
ReleaseMutex(wasapiout->mtx_cbproc);
} else {
wasapiout->paused = 0;
//wasapiout->ac->lpVtbl->Start(wasapiout->ac);
}
}
static void wasapi_free(struct sound_state *state) {
struct wasapi_state *wasapiout = (struct wasapi_state *)state;
HANDLE heap = GetProcessHeap();
wasapiout->terminate = 1;
SetEvent(wasapiout->e_update);
WaitForSingleObject(wasapiout->t_update, INFINITE);
wasapiout->ac->lpVtbl->Stop(wasapiout->ac);
wasapiout->rc->lpVtbl->Release(wasapiout->rc);
wasapiout->ac->lpVtbl->Release(wasapiout->ac);
HeapFree(heap, 0, wasapiout->buf_f);
HeapFree(heap, 0, wasapiout->buf_i);
CloseHandle(wasapiout->mtx_cbproc);
CloseHandle(wasapiout->e_update);
// g_src.src_delete(wasapiout->src);
HeapFree(heap, 0, wasapiout);
}
struct sound_state *wasapi_init(HWND hwnd, unsigned srate, unsigned sectlen,
sound_callback cbfunc, void *userptr) {
if (sectlen % (sizeof(int16_t)*2)) goto err;
unsigned sectframes = sectlen / (sizeof(int16_t)*2);
/*
src_load();
if (!g_src.dll) goto err;
*/
HANDLE heap = GetProcessHeap();
if (!heap) {
MessageBoxW(hwnd, L"Cannot get process heap for wasapi", L"Error", MB_ICONSTOP);
goto err;
}
struct wasapi_state *wasapiout = HeapAlloc(heap, HEAP_ZERO_MEMORY,
sizeof(struct wasapi_state));
if (!wasapiout) {
MessageBoxW(hwnd, L"Cannot allocate memory for wasapi", L"Error", MB_ICONSTOP);
goto err;
}
/*
{
int e;
wasapiout->src = g_src.src_new(SRC_SINC_BEST_QUALITY, 2, &e);
}
if (!wasapiout->src) {
MessageBoxW(hwnd, L"WASAPI failed to create samplerate converter", L"Error",
MB_ICONSTOP);
goto err_wasapiout;
}
*/
CoInitializeEx(0, COINIT_MULTITHREADED);
HRESULT hr;
IMMDeviceEnumerator *mmde;
hr = CoCreateInstance(
&CLSID_MMDeviceEnumerator,
0,
CLSCTX_ALL,
&IID_IMMDeviceEnumerator,
(void **)&mmde);
if (FAILED(hr)) {
goto err_src;
}
IMMDevice *mmdev;
hr = mmde->lpVtbl->GetDefaultAudioEndpoint(mmde, eRender, eMultimedia, &mmdev);
if (FAILED(hr)) {
MessageBoxW(hwnd, L"WASAPI GetDefaultEndpoint failed", L"Error", MB_ICONSTOP);
goto err_mmde;
}
hr = mmdev->lpVtbl->Activate(
mmdev, &IID_IAudioClient, CLSCTX_ALL, 0, (void **)&wasapiout->ac);
if (FAILED(hr)) {
MessageBoxW(hwnd, L"WASAPI cannot get IAudioClient", L"Error",
MB_ICONSTOP);
goto err_mmdev;
}
wasapiout->e_update = CreateEventW(0, FALSE, FALSE, 0);
if (!wasapiout->e_update) {
MessageBoxW(hwnd, L"WASAPI CreateEvent failed", L"Error", MB_ICONSTOP);
goto err_ac;
}
wasapiout->mtx_cbproc = CreateMutexW(0, FALSE, 0);
if (!wasapiout->mtx_cbproc) {
MessageBoxW(hwnd, L"WASAPI CreateMutex failed", L"Error", MB_ICONSTOP);
goto err_event;
}
DWORD mixsrate;
{
WAVEFORMATEX *mixfmt;
hr = wasapiout->ac->lpVtbl->GetMixFormat(wasapiout->ac, &mixfmt);
if (FAILED(hr)) {
MessageBoxW(hwnd, L"WASAPI GetMixFormat failed", L"Error", MB_ICONSTOP);
goto err_mtx;
}
mixsrate = mixfmt->nSamplesPerSec;
CoTaskMemFree(mixfmt);
}
WAVEFORMATEXTENSIBLE format = {0};
format.Format.wFormatTag = WAVE_FORMAT_PCM;
format.Format.nChannels = 2;
format.Format.nSamplesPerSec = srate;
format.Format.wBitsPerSample = 16;
format.Format.nBlockAlign =
format.Format.nChannels * format.Format.wBitsPerSample / 8;
format.Format.nAvgBytesPerSec =
format.Format.nSamplesPerSec * format.Format.nBlockAlign;
format.Format.cbSize = 0;//sizeof(format)-sizeof(format.Format);
format.Samples.wValidBitsPerSample = format.Format.wBitsPerSample;
format.dwChannelMask = (1<<format.Format.nChannels)-1;
format.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
hr = wasapiout->ac->lpVtbl->Initialize(
wasapiout->ac, AUDCLNT_SHAREMODE_SHARED,
AUDCLNT_STREAMFLAGS_EVENTCALLBACK | 0x80000000,
0, 0, &format.Format, 0);
if (FAILED(hr)) {
wchar_t str[] = L"0x : WASAPI IAudioClient Initialize failed";
for (int i = 0; i < 8; i++) {
wchar_t c = (hr >> ((7-i)*4)) & 0xf;
c += L'0';
if (c > L'9') c += (L'A' - L'0');
str[2+i] = c;
}
MessageBoxW(hwnd, str, L"Error",
MB_ICONSTOP);
goto err_mtx;
}
hr = wasapiout->ac->lpVtbl->SetEventHandle(
wasapiout->ac, wasapiout->e_update);
if (FAILED(hr)) {
MessageBoxW(hwnd, L"WASAPI cannot set event handle", L"Error", MB_ICONSTOP);
goto err_mtx;
}
hr = wasapiout->ac->lpVtbl->GetBufferSize(
wasapiout->ac, &wasapiout->wasapi_buf_frames);
if (FAILED(hr)) {
MessageBoxW(hwnd, L"WASAPI GetBufferSize failed", L"Error", MB_ICONSTOP);
goto err_mtx;
}
wasapiout->wasapi_buf_frames /= 4;
wasapiout->buf_i = HeapAlloc(heap, HEAP_ZERO_MEMORY,
sizeof(int16_t)*wasapiout->wasapi_buf_frames*2);
if (!wasapiout->buf_i) {
MessageBoxW(hwnd, L"WASAPI buffer allocation failed", L"Error", MB_ICONSTOP);
goto err_mtx;
}
wasapiout->buf_f = HeapAlloc(heap, HEAP_ZERO_MEMORY,
sizeof(float)*sectframes*2);
if (!wasapiout->buf_f) {
MessageBoxW(hwnd, L"WASAPI buffer allocation failed", L"Error", MB_ICONSTOP);
goto err_buf_i;
}
hr = wasapiout->ac->lpVtbl->GetService(
wasapiout->ac, &IID_IAudioRenderClient, (void **)&wasapiout->rc);
if (FAILED(hr)) {
MessageBoxW(hwnd, L"WASAPI cannot get IAudioRenderClient", L"Error",
MB_ICONSTOP);
goto err_buf_f;
}
wasapiout->terminate = 0;
wasapiout->paused = 1;
wasapiout->cbfunc = cbfunc;
wasapiout->userptr = userptr;
wasapiout->buf_frames = sectframes;
wasapiout->buf_used_frames = 0;
wasapiout->t_update = CreateThread(0, 0, bufupdatethread, wasapiout, 0, 0);
if (!wasapiout->t_update) {
MessageBoxW(hwnd, L"WASAPI CreateThread error", L"Error", MB_ICONSTOP);
goto err_rc;
}
SetThreadPriority(wasapiout->t_update, THREAD_PRIORITY_HIGHEST);
wasapiout->soundout.pause = wasapi_pause;
wasapiout->soundout.free = wasapi_free;
wasapiout->soundout.apiname = L"WASAPI";
mmdev->lpVtbl->Release(mmdev);
mmde->lpVtbl->Release(mmde);
wasapiout->ac->lpVtbl->Start(wasapiout->ac);
return &wasapiout->soundout;
err_rc:
wasapiout->rc->lpVtbl->Release(wasapiout->rc);
err_buf_f:
HeapFree(heap, 0, wasapiout->buf_f);
err_buf_i:
HeapFree(heap, 0, wasapiout->buf_i);
err_mtx:
CloseHandle(wasapiout->mtx_cbproc);
err_event:
CloseHandle(wasapiout->e_update);
err_ac:
wasapiout->ac->lpVtbl->Release(wasapiout->ac);
err_mmdev:
mmdev->lpVtbl->Release(mmdev);
err_mmde:
mmde->lpVtbl->Release(mmde);
err_src:
// g_src.src_delete(wasapiout->src);
err_wasapiout:
HeapFree(heap, 0, wasapiout);
err:
return 0;
}
|
