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directsound: Implemented audio capture support.

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This commit is contained in:
Ryan C. Gordon 2016-08-10 16:00:16 -04:00
parent 21c7fe0060
commit b78ec97496
2 changed files with 185 additions and 69 deletions
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251
src/audio/directsound/SDL_directsound.c
View file

@ -24,6 +24,7 @@
/* Allow access to a raw mixing buffer */
#include "SDL_assert.h"
#include "SDL_timer.h"
#include "SDL_loadso.h"
#include "SDL_audio.h"
@ -36,11 +37,13 @@
/* DirectX function pointers for audio */
static void* DSoundDLL = NULL;
typedef HRESULT(WINAPI*fnDirectSoundCreate8)(LPGUID,LPDIRECTSOUND*,LPUNKNOWN);
typedef HRESULT(WINAPI*fnDirectSoundEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
typedef HRESULT(WINAPI*fnDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW,LPVOID);
typedef HRESULT (WINAPI *fnDirectSoundCreate8)(LPGUID,LPDIRECTSOUND*,LPUNKNOWN);
typedef HRESULT (WINAPI *fnDirectSoundEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
typedef HRESULT (WINAPI *fnDirectSoundCaptureCreate8)(LPCGUID,LPDIRECTSOUNDCAPTURE8 *,LPUNKNOWN);
typedef HRESULT (WINAPI *fnDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW,LPVOID);
static fnDirectSoundCreate8 pDirectSoundCreate8 = NULL;
static fnDirectSoundEnumerateW pDirectSoundEnumerateW = NULL;
static fnDirectSoundCaptureCreate8 pDirectSoundCaptureCreate8 = NULL;
static fnDirectSoundCaptureEnumerateW pDirectSoundCaptureEnumerateW = NULL;
static void
@ -48,6 +51,7 @@ DSOUND_Unload(void)
{
pDirectSoundCreate8 = NULL;
pDirectSoundEnumerateW = NULL;
pDirectSoundCaptureCreate8 = NULL;
pDirectSoundCaptureEnumerateW = NULL;
if (DSoundDLL != NULL) {
@ -76,6 +80,7 @@ DSOUND_Load(void)
loaded = 1; /* will reset if necessary. */
DSOUNDLOAD(DirectSoundCreate8);
DSOUNDLOAD(DirectSoundEnumerateW);
DSOUNDLOAD(DirectSoundCaptureCreate8);
DSOUNDLOAD(DirectSoundCaptureEnumerateW);
#undef DSOUNDLOAD
@ -197,7 +202,7 @@ DSOUND_WaitDevice(_THIS)
return;
}
while ((cursor / this->hidden->mixlen) == this->hidden->lastchunk) {
while ((cursor / this->spec.size) == this->hidden->lastchunk) {
/* FIXME: find out how much time is left and sleep that long */
SDL_Delay(1);
@ -239,9 +244,8 @@ DSOUND_PlayDevice(_THIS)
if (this->hidden->locked_buf) {
IDirectSoundBuffer_Unlock(this->hidden->mixbuf,
this->hidden->locked_buf,
this->hidden->mixlen, NULL, 0);
this->spec.size, NULL, 0);
}
}
static Uint8 *
@ -265,7 +269,7 @@ DSOUND_GetDeviceBuf(_THIS)
SetDSerror("DirectSound GetCurrentPosition", result);
return (NULL);
}
cursor /= this->hidden->mixlen;
cursor /= this->spec.size;
#ifdef DEBUG_SOUND
/* Detect audio dropouts */
{
@ -281,17 +285,17 @@ DSOUND_GetDeviceBuf(_THIS)
#endif
this->hidden->lastchunk = cursor;
cursor = (cursor + 1) % this->hidden->num_buffers;
cursor *= this->hidden->mixlen;
cursor *= this->spec.size;
/* Lock the audio buffer */
result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor,
this->hidden->mixlen,
this->spec.size,
(LPVOID *) & this->hidden->locked_buf,
&rawlen, NULL, &junk, 0);
if (result == DSERR_BUFFERLOST) {
IDirectSoundBuffer_Restore(this->hidden->mixbuf);
result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor,
this->hidden->mixlen,
this->spec.size,
(LPVOID *) & this->
hidden->locked_buf, &rawlen, NULL,
&junk, 0);
@ -310,7 +314,7 @@ DSOUND_WaitDone(_THIS)
/* Wait for the playing chunk to finish */
if (stream != NULL) {
SDL_memset(stream, this->spec.silence, this->hidden->mixlen);
SDL_memset(stream, this->spec.silence, this->spec.size);
DSOUND_PlayDevice(this);
}
DSOUND_WaitDevice(this);
@ -319,83 +323,106 @@ DSOUND_WaitDone(_THIS)
IDirectSoundBuffer_Stop(this->hidden->mixbuf);
}
static int
DSOUND_CaptureFromDevice(_THIS, void *buffer, int buflen)
{
struct SDL_PrivateAudioData *h = this->hidden;
DWORD junk, cursor, ptr1len, ptr2len;
VOID *ptr1, *ptr2;
SDL_assert(buflen == this->spec.size);
while (SDL_TRUE) {
if (SDL_AtomicGet(&this->shutdown)) { /* in case the buffer froze... */
SDL_memset(buffer, this->spec.silence, buflen);
return buflen;
}
if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) != DS_OK) {
return -1;
}
if ((cursor / this->spec.size) == h->lastchunk) {
SDL_Delay(1); /* FIXME: find out how much time is left and sleep that long */
} else {
break;
}
}
if (IDirectSoundCaptureBuffer_Lock(h->capturebuf, h->lastchunk * this->spec.size, this->spec.size, &ptr1, &ptr1len, &ptr2, &ptr2len, 0) != DS_OK) {
return -1;
}
SDL_assert(ptr1len == this->spec.size);
SDL_assert(ptr2 == NULL);
SDL_assert(ptr2len == 0);
SDL_memcpy(buffer, ptr1, ptr1len);
if (IDirectSoundCaptureBuffer_Unlock(h->capturebuf, ptr1, ptr1len, ptr2, ptr2len) != DS_OK) {
return -1;
}
h->lastchunk = (h->lastchunk + 1) % h->num_buffers;
return ptr1len;
}
static void
DSOUND_FlushCapture(_THIS)
{
struct SDL_PrivateAudioData *h = this->hidden;
DWORD junk, cursor;
if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) == DS_OK) {
h->lastchunk = cursor / this->spec.size;
}
}
static void
DSOUND_CloseDevice(_THIS)
{
if (this->hidden->mixbuf != NULL) {
IDirectSoundBuffer_Stop(this->hidden->mixbuf);
IDirectSoundBuffer_Release(this->hidden->mixbuf);
}
if (this->hidden->sound != NULL) {
IDirectSound_Release(this->hidden->sound);
}
if (this->hidden->capturebuf != NULL) {
IDirectSoundCaptureBuffer_Stop(this->hidden->capturebuf);
IDirectSoundCaptureBuffer_Release(this->hidden->capturebuf);
}
if (this->hidden->capture != NULL) {
IDirectSoundCapture_Release(this->hidden->capture);
}
SDL_free(this->hidden);
}
/* This function tries to create a secondary audio buffer, and returns the
number of audio chunks available in the created buffer.
number of audio chunks available in the created buffer. This is for
playback devices, not capture.
*/
static int
CreateSecondary(_THIS, HWND focus)
CreateSecondary(_THIS, const DWORD bufsize, WAVEFORMATEX *wfmt)
{
LPDIRECTSOUND sndObj = this->hidden->sound;
LPDIRECTSOUNDBUFFER *sndbuf = &this->hidden->mixbuf;
Uint32 chunksize = this->spec.size;
const int numchunks = 8;
HRESULT result = DS_OK;
DSBUFFERDESC format;
LPVOID pvAudioPtr1, pvAudioPtr2;
DWORD dwAudioBytes1, dwAudioBytes2;
WAVEFORMATEX wfmt;
SDL_zero(wfmt);
if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
wfmt.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
} else {
wfmt.wFormatTag = WAVE_FORMAT_PCM;
}
wfmt.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
wfmt.nChannels = this->spec.channels;
wfmt.nSamplesPerSec = this->spec.freq;
wfmt.nBlockAlign = wfmt.nChannels * (wfmt.wBitsPerSample / 8);
wfmt.nAvgBytesPerSec = wfmt.nSamplesPerSec * wfmt.nBlockAlign;
/* Try to set primary mixing privileges */
if (focus) {
result = IDirectSound_SetCooperativeLevel(sndObj,
focus, DSSCL_PRIORITY);
} else {
result = IDirectSound_SetCooperativeLevel(sndObj,
GetDesktopWindow(),
DSSCL_NORMAL);
}
if (result != DS_OK) {
return SetDSerror("DirectSound SetCooperativeLevel", result);
}
/* Try to create the secondary buffer */
SDL_zero(format);
format.dwSize = sizeof(format);
format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
if (!focus) {
format.dwFlags |= DSBCAPS_GLOBALFOCUS;
} else {
format.dwFlags |= DSBCAPS_STICKYFOCUS;
}
format.dwBufferBytes = numchunks * chunksize;
if ((format.dwBufferBytes < DSBSIZE_MIN) ||
(format.dwBufferBytes > DSBSIZE_MAX)) {
return SDL_SetError("Sound buffer size must be between %d and %d",
DSBSIZE_MIN / numchunks, DSBSIZE_MAX / numchunks);
}
format.dwReserved = 0;
format.lpwfxFormat = &wfmt;
format.dwFlags |= DSBCAPS_GLOBALFOCUS;
format.dwBufferBytes = bufsize;
format.lpwfxFormat = wfmt;
result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
if (result != DS_OK) {
return SetDSerror("DirectSound CreateSoundBuffer", result);
}
IDirectSoundBuffer_SetFormat(*sndbuf, &wfmt);
IDirectSoundBuffer_SetFormat(*sndbuf, wfmt);
/* Silence the initial audio buffer */
result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
@ -410,18 +437,65 @@ CreateSecondary(_THIS, HWND focus)
}
/* We're ready to go */
return (numchunks);
return 0;
}
/* This function tries to create a capture buffer, and returns the
number of audio chunks available in the created buffer. This is for
capture devices, not playback.
*/
static int
CreateCaptureBuffer(_THIS, const DWORD bufsize, WAVEFORMATEX *wfmt)
{
LPDIRECTSOUNDCAPTURE capture = this->hidden->capture;
LPDIRECTSOUNDCAPTUREBUFFER *capturebuf = &this->hidden->capturebuf;
DSCBUFFERDESC format;
// DWORD junk, cursor;
HRESULT result;
SDL_zero(format);
format.dwSize = sizeof (format);
format.dwFlags = DSCBCAPS_WAVEMAPPED;
format.dwBufferBytes = bufsize;
format.lpwfxFormat = wfmt;
result = IDirectSoundCapture_CreateCaptureBuffer(capture, &format, capturebuf, NULL);
if (result != DS_OK) {
return SetDSerror("DirectSound CreateCaptureBuffer", result);
}
result = IDirectSoundCaptureBuffer_Start(*capturebuf, DSCBSTART_LOOPING);
if (result != DS_OK) {
IDirectSoundCaptureBuffer_Release(*capturebuf);
return SetDSerror("DirectSound Start", result);
}
#if 0
/* presumably this starts at zero, but just in case... */
result = IDirectSoundCaptureBuffer_GetCurrentPosition(*capturebuf, &junk, &cursor);
if (result != DS_OK) {
IDirectSoundCaptureBuffer_Stop(*capturebuf);
IDirectSoundCaptureBuffer_Release(*capturebuf);
return SetDSerror("DirectSound GetCurrentPosition", result);
}
this->hidden->lastchunk = cursor / this->spec.size;
#endif
return 0;
}
static int
DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
const DWORD numchunks = 8;
HRESULT result;
SDL_bool valid_format = SDL_FALSE;
SDL_bool tried_format = SDL_FALSE;
SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
LPGUID guid = (LPGUID) handle;
DWORD bufsize;
/* Initialize all variables that we clean on shutdown */
this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc((sizeof *this->hidden));
@ -431,9 +505,22 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
SDL_zerop(this->hidden);
/* Open the audio device */
result = pDirectSoundCreate8(guid, &this->hidden->sound, NULL);
if (result != DS_OK) {
return SetDSerror("DirectSoundCreate", result);
if (iscapture) {
result = pDirectSoundCaptureCreate8(guid, &this->hidden->capture, NULL);
if (result != DS_OK) {
return SetDSerror("DirectSoundCaptureCreate8", result);
}
} else {
result = pDirectSoundCreate8(guid, &this->hidden->sound, NULL);
if (result != DS_OK) {
return SetDSerror("DirectSoundCreate8", result);
}
result = IDirectSound_SetCooperativeLevel(this->hidden->sound,
GetDesktopWindow(),
DSSCL_NORMAL);
if (result != DS_OK) {
return SetDSerror("DirectSound SetCooperativeLevel", result);
}
}
while ((!valid_format) && (test_format)) {
@ -443,12 +530,38 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
case AUDIO_S32:
case AUDIO_F32:
tried_format = SDL_TRUE;
this->spec.format = test_format;
/* Update the fragment size as size in bytes */
SDL_CalculateAudioSpec(&this->spec);
this->hidden->num_buffers = CreateSecondary(this, NULL);
if (this->hidden->num_buffers > 0) {
valid_format = SDL_TRUE;
bufsize = numchunks * this->spec.size;
if ((bufsize < DSBSIZE_MIN) || (bufsize > DSBSIZE_MAX)) {
SDL_SetError("Sound buffer size must be between %d and %d",
(DSBSIZE_MIN < numchunks) ? 1 : DSBSIZE_MIN / numchunks,
DSBSIZE_MAX / numchunks);
} else {
int rc;
WAVEFORMATEX wfmt;
SDL_zero(wfmt);
if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
wfmt.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
} else {
wfmt.wFormatTag = WAVE_FORMAT_PCM;
}
wfmt.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
wfmt.nChannels = this->spec.channels;
wfmt.nSamplesPerSec = this->spec.freq;
wfmt.nBlockAlign = wfmt.nChannels * (wfmt.wBitsPerSample / 8);
wfmt.nAvgBytesPerSec = wfmt.nSamplesPerSec * wfmt.nBlockAlign;
rc = iscapture ? CreateCaptureBuffer(this, bufsize, &wfmt) : CreateSecondary(this, bufsize, &wfmt);
if (rc == 0) {
this->hidden->num_buffers = numchunks;
valid_format = SDL_TRUE;
}
}
break;
}
@ -462,8 +575,7 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
return SDL_SetError("DirectSound: Unsupported audio format");
}
/* The buffer will auto-start playing in DSOUND_WaitDevice() */
this->hidden->mixlen = this->spec.size;
/* Playback buffers will auto-start playing in DSOUND_WaitDevice() */
return 0; /* good to go. */
}
@ -490,11 +602,14 @@ DSOUND_Init(SDL_AudioDriverImpl * impl)
impl->WaitDevice = DSOUND_WaitDevice;
impl->WaitDone = DSOUND_WaitDone;
impl->GetDeviceBuf = DSOUND_GetDeviceBuf;
impl->CaptureFromDevice = DSOUND_CaptureFromDevice;
impl->FlushCapture = DSOUND_FlushCapture;
impl->CloseDevice = DSOUND_CloseDevice;
impl->FreeDeviceHandle = DSOUND_FreeDeviceHandle;
impl->Deinitialize = DSOUND_Deinitialize;
impl->HasCaptureSupport = SDL_TRUE;
return 1; /* this audio target is available. */
}

3
src/audio/directsound/SDL_directsound.h
View file

@ -35,8 +35,9 @@ struct SDL_PrivateAudioData
{
LPDIRECTSOUND sound;
LPDIRECTSOUNDBUFFER mixbuf;
LPDIRECTSOUNDCAPTURE capture;
LPDIRECTSOUNDCAPTUREBUFFER capturebuf;
int num_buffers;
int mixlen;
DWORD lastchunk;
Uint8 *locked_buf;
};