mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-16 11:06:49 +01:00
directsound: Implemented audio capture support.
This commit is contained in:
Ryan C. Gordon
parent
21c7fe0060
commit
b78ec97496
@ -24,6 +24,7 @@
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/* Allow access to a raw mixing buffer */
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#include "SDL_assert.h"
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#include "SDL_timer.h"
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#include "SDL_loadso.h"
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#include "SDL_audio.h"
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@ -36,11 +37,13 @@
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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*fnDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW,LPVOID);
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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 void
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@ -48,6 +51,7 @@ 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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@ -76,6 +80,7 @@ DSOUND_Load(void)
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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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@ -197,7 +202,7 @@ DSOUND_WaitDevice(_THIS)
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return;
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}
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while ((cursor / this->hidden->mixlen) == this->hidden->lastchunk) {
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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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@ -239,9 +244,8 @@ DSOUND_PlayDevice(_THIS)
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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->hidden->mixlen, NULL, 0);
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this->spec.size, NULL, 0);
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}
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}
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static Uint8 *
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@ -265,7 +269,7 @@ DSOUND_GetDeviceBuf(_THIS)
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SetDSerror("DirectSound GetCurrentPosition", result);
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return (NULL);
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}
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cursor /= this->hidden->mixlen;
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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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@ -281,17 +285,17 @@ DSOUND_GetDeviceBuf(_THIS)
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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->hidden->mixlen;
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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->hidden->mixlen,
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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->hidden->mixlen,
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this->spec.size,
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(LPVOID *) & this->
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hidden->locked_buf, &rawlen, NULL,
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&junk, 0);
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@ -310,7 +314,7 @@ DSOUND_WaitDone(_THIS)
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/* Wait for the playing chunk to finish */
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if (stream != NULL) {
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SDL_memset(stream, this->spec.silence, this->hidden->mixlen);
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SDL_memset(stream, this->spec.silence, this->spec.size);
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DSOUND_PlayDevice(this);
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}
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DSOUND_WaitDevice(this);
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@ -319,83 +323,106 @@ DSOUND_WaitDone(_THIS)
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IDirectSoundBuffer_Stop(this->hidden->mixbuf);
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}
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static int
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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
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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
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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.
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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
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CreateSecondary(_THIS, HWND focus)
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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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Uint32 chunksize = this->spec.size;
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const int numchunks = 8;
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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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WAVEFORMATEX wfmt;
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SDL_zero(wfmt);
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if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
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wfmt.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
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} else {
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wfmt.wFormatTag = WAVE_FORMAT_PCM;
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}
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wfmt.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
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wfmt.nChannels = this->spec.channels;
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wfmt.nSamplesPerSec = this->spec.freq;
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wfmt.nBlockAlign = wfmt.nChannels * (wfmt.wBitsPerSample / 8);
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wfmt.nAvgBytesPerSec = wfmt.nSamplesPerSec * wfmt.nBlockAlign;
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/* Try to set primary mixing privileges */
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if (focus) {
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result = IDirectSound_SetCooperativeLevel(sndObj,
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focus, DSSCL_PRIORITY);
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} else {
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result = IDirectSound_SetCooperativeLevel(sndObj,
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GetDesktopWindow(),
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DSSCL_NORMAL);
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}
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if (result != DS_OK) {
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return SetDSerror("DirectSound SetCooperativeLevel", result);
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}
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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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if (!focus) {
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format.dwFlags |= DSBCAPS_GLOBALFOCUS;
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} else {
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format.dwFlags |= DSBCAPS_STICKYFOCUS;
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}
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format.dwBufferBytes = numchunks * chunksize;
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if ((format.dwBufferBytes < DSBSIZE_MIN) ||
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(format.dwBufferBytes > DSBSIZE_MAX)) {
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return SDL_SetError("Sound buffer size must be between %d and %d",
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DSBSIZE_MIN / numchunks, DSBSIZE_MAX / numchunks);
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}
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format.dwReserved = 0;
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format.lpwfxFormat = &wfmt;
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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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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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@ -410,17 +437,64 @@ CreateSecondary(_THIS, HWND focus)
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}
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/* We're ready to go */
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return (numchunks);
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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
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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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// DWORD junk, cursor;
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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
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DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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{
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const DWORD numchunks = 8;
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HRESULT result;
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SDL_bool valid_format = SDL_FALSE;
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SDL_bool tried_format = SDL_FALSE;
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SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
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LPGUID guid = (LPGUID) 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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@ -431,9 +505,22 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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SDL_zerop(this->hidden);
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/* Open the audio device */
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result = pDirectSoundCreate8(guid, &this->hidden->sound, NULL);
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if (result != DS_OK) {
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return SetDSerror("DirectSoundCreate", result);
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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) {
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return SetDSerror("DirectSoundCreate8", result);
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}
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result = IDirectSound_SetCooperativeLevel(this->hidden->sound,
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GetDesktopWindow(),
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DSSCL_NORMAL);
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if (result != DS_OK) {
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return SetDSerror("DirectSound SetCooperativeLevel", result);
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}
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}
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while ((!valid_format) && (test_format)) {
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@ -443,12 +530,38 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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case AUDIO_S32:
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case AUDIO_F32:
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tried_format = SDL_TRUE;
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this->spec.format = test_format;
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/* Update the fragment size as size in bytes */
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SDL_CalculateAudioSpec(&this->spec);
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this->hidden->num_buffers = CreateSecondary(this, NULL);
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if (this->hidden->num_buffers > 0) {
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valid_format = SDL_TRUE;
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bufsize = numchunks * this->spec.size;
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if ((bufsize < DSBSIZE_MIN) || (bufsize > DSBSIZE_MAX)) {
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SDL_SetError("Sound buffer size must be between %d and %d",
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(DSBSIZE_MIN < numchunks) ? 1 : DSBSIZE_MIN / numchunks,
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DSBSIZE_MAX / numchunks);
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} else {
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int rc;
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WAVEFORMATEX wfmt;
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SDL_zero(wfmt);
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if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
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wfmt.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
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} else {
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wfmt.wFormatTag = WAVE_FORMAT_PCM;
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}
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wfmt.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
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wfmt.nChannels = this->spec.channels;
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wfmt.nSamplesPerSec = this->spec.freq;
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wfmt.nBlockAlign = wfmt.nChannels * (wfmt.wBitsPerSample / 8);
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wfmt.nAvgBytesPerSec = wfmt.nSamplesPerSec * wfmt.nBlockAlign;
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rc = iscapture ? CreateCaptureBuffer(this, bufsize, &wfmt) : CreateSecondary(this, bufsize, &wfmt);
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if (rc == 0) {
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this->hidden->num_buffers = numchunks;
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valid_format = SDL_TRUE;
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}
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}
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break;
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}
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@ -462,8 +575,7 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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return SDL_SetError("DirectSound: Unsupported audio format");
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}
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/* The buffer will auto-start playing in DSOUND_WaitDevice() */
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this->hidden->mixlen = this->spec.size;
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/* Playback buffers will auto-start playing in DSOUND_WaitDevice() */
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return 0; /* good to go. */
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}
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@ -490,11 +602,14 @@ DSOUND_Init(SDL_AudioDriverImpl * impl)
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impl->WaitDevice = DSOUND_WaitDevice;
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impl->WaitDone = DSOUND_WaitDone;
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impl->GetDeviceBuf = DSOUND_GetDeviceBuf;
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impl->CaptureFromDevice = DSOUND_CaptureFromDevice;
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impl->FlushCapture = DSOUND_FlushCapture;
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impl->CloseDevice = DSOUND_CloseDevice;
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impl->FreeDeviceHandle = DSOUND_FreeDeviceHandle;
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impl->Deinitialize = DSOUND_Deinitialize;
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impl->HasCaptureSupport = SDL_TRUE;
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return 1; /* this audio target is available. */
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}
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@ -35,8 +35,9 @@ struct SDL_PrivateAudioData
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{
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LPDIRECTSOUND sound;
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LPDIRECTSOUNDBUFFER mixbuf;
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LPDIRECTSOUNDCAPTURE capture;
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LPDIRECTSOUNDCAPTUREBUFFER capturebuf;
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int num_buffers;
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int mixlen;
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DWORD lastchunk;
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Uint8 *locked_buf;
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};
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