This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_dx5audio.c
517 lines (453 loc) · 15.4 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
Lesser General Public License for more details.
14
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
26
27
/* Allow access to a raw mixing buffer */
#include "SDL_timer.h"
#include "SDL_audio.h"
28
#include "../SDL_audio_c.h"
29
30
#include "SDL_dx5audio.h"
31
32
33
34
35
36
37
/* !!! FIXME: move this somewhere that other drivers can use it... */
#if defined(_WIN32_WCE)
#define WINDOWS_OS_NAME "Windows CE/PocketPC"
#elif defined(WIN64)
#define WINDOWS_OS_NAME "Win64"
#else
#define WINDOWS_OS_NAME "Win32"
38
#endif
39
40
/* DirectX function pointers for audio */
41
static HINSTANCE DSoundDLL = NULL;
42
43
static HRESULT(WINAPI * DSoundCreate) (LPGUID, LPDIRECTSOUND *, LPUNKNOWN) =
NULL;
44
45
static void
46
DSOUND_Unload(void)
47
{
48
49
50
51
if (DSoundDLL != NULL) {
FreeLibrary(DSoundDLL);
}
52
53
DSoundCreate = NULL;
DSoundDLL = NULL;
54
55
56
}
57
58
static int
DSOUND_Load(void)
59
{
60
int loaded = 0;
61
62
DSOUND_Unload();
63
64
65
66
67
68
69
70
71
72
73
DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
if (DSoundDLL == NULL) {
SDL_SetError("DirectSound: failed to load DSOUND.DLL");
} else {
/* Now make sure we have DirectX 5 or better... */
/* (DirectSoundCaptureCreate was added in DX5) */
if (!GetProcAddress(DSoundDLL, TEXT("DirectSoundCaptureCreate"))) {
SDL_SetError("DirectSound: System doesn't appear to have DX5.");
} else {
DSoundCreate = (void *) GetProcAddress(DSoundDLL,
74
TEXT("DirectSoundCreate"));
75
76
}
77
78
79
80
81
82
if (!DSoundCreate) {
SDL_SetError("DirectSound: Failed to find DirectSoundCreate");
} else {
loaded = 1;
}
}
83
84
85
86
if (!loaded) {
DSOUND_Unload();
}
87
88
return loaded;
89
90
91
}
92
93
static void
SetDSerror(const char *function, int code)
94
{
95
96
97
98
99
100
static const char *error;
static char errbuf[1024];
errbuf[0] = 0;
switch (code) {
case E_NOINTERFACE:
101
error = "Unsupported interface -- Is DirectX 5.0 or later installed?";
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
break;
case DSERR_ALLOCATED:
error = "Audio device in use";
break;
case DSERR_BADFORMAT:
error = "Unsupported audio format";
break;
case DSERR_BUFFERLOST:
error = "Mixing buffer was lost";
break;
case DSERR_CONTROLUNAVAIL:
error = "Control requested is not available";
break;
case DSERR_INVALIDCALL:
error = "Invalid call for the current state";
break;
case DSERR_INVALIDPARAM:
error = "Invalid parameter";
break;
case DSERR_NODRIVER:
error = "No audio device found";
break;
case DSERR_OUTOFMEMORY:
error = "Out of memory";
break;
case DSERR_PRIOLEVELNEEDED:
error = "Caller doesn't have priority";
break;
case DSERR_UNSUPPORTED:
error = "Function not supported";
break;
default:
SDL_snprintf(errbuf, SDL_arraysize(errbuf),
"%s: Unknown DirectSound error: 0x%x", function, code);
break;
}
if (!errbuf[0]) {
SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function,
error);
}
SDL_SetError("%s", errbuf);
return;
144
145
146
147
148
}
/* DirectSound needs to be associated with a window */
static HWND mainwin = NULL;
/* */
149
150
void
151
DSOUND_SoundFocus(HWND hwnd)
152
{
153
/* !!! FIXME: probably broken with multi-window support in SDL 1.3 ... */
154
mainwin = hwnd;
155
156
}
157
static void
158
DSOUND_ThreadInit(_THIS)
159
{
160
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
161
162
}
163
static void
164
DSOUND_WaitDevice(_THIS)
165
{
166
167
168
169
DWORD status = 0;
DWORD cursor = 0;
DWORD junk = 0;
HRESULT result = DS_OK;
170
171
172
173
/* Semi-busy wait, since we have no way of getting play notification
on a primary mixing buffer located in hardware (DirectX 5.0)
*/
174
175
result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
&junk, &cursor);
176
177
if (result != DS_OK) {
if (result == DSERR_BUFFERLOST) {
178
IDirectSoundBuffer_Restore(this->hidden->mixbuf);
179
}
180
#ifdef DEBUG_SOUND
181
SetDSerror("DirectSound GetCurrentPosition", result);
182
#endif
183
184
185
return;
}
186
while ((cursor / this->hidden->mixlen) == this->hidden->lastchunk) {
187
188
189
190
/* FIXME: find out how much time is left and sleep that long */
SDL_Delay(1);
/* Try to restore a lost sound buffer */
191
IDirectSoundBuffer_GetStatus(this->hidden->mixbuf, &status);
192
if ((status & DSBSTATUS_BUFFERLOST)) {
193
194
IDirectSoundBuffer_Restore(this->hidden->mixbuf);
IDirectSoundBuffer_GetStatus(this->hidden->mixbuf, &status);
195
196
197
198
199
if ((status & DSBSTATUS_BUFFERLOST)) {
break;
}
}
if (!(status & DSBSTATUS_PLAYING)) {
200
201
result = IDirectSoundBuffer_Play(this->hidden->mixbuf, 0, 0,
DSBPLAY_LOOPING);
202
203
204
if (result == DS_OK) {
continue;
}
205
#ifdef DEBUG_SOUND
206
SetDSerror("DirectSound Play", result);
207
#endif
208
209
210
211
return;
}
/* Find out where we are playing */
212
result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
213
214
215
216
217
218
&junk, &cursor);
if (result != DS_OK) {
SetDSerror("DirectSound GetCurrentPosition", result);
return;
}
}
219
220
}
221
static void
222
DSOUND_PlayDevice(_THIS)
223
{
224
/* Unlock the buffer, allowing it to play */
225
226
227
228
if (this->hidden->locked_buf) {
IDirectSoundBuffer_Unlock(this->hidden->mixbuf,
this->hidden->locked_buf,
this->hidden->mixlen, NULL, 0);
229
}
230
231
232
}
233
static Uint8 *
234
DSOUND_GetDeviceBuf(_THIS)
235
{
236
237
238
239
DWORD cursor = 0;
DWORD junk = 0;
HRESULT result = DS_OK;
DWORD rawlen = 0;
240
241
/* Figure out which blocks to fill next */
242
243
244
this->hidden->locked_buf = NULL;
result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
&junk, &cursor);
245
if (result == DSERR_BUFFERLOST) {
246
247
IDirectSoundBuffer_Restore(this->hidden->mixbuf);
result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf,
248
249
250
251
252
253
&junk, &cursor);
}
if (result != DS_OK) {
SetDSerror("DirectSound GetCurrentPosition", result);
return (NULL);
}
254
cursor /= this->hidden->mixlen;
255
#ifdef DEBUG_SOUND
256
257
258
/* Detect audio dropouts */
{
DWORD spot = cursor;
259
260
if (spot < this->hidden->lastchunk) {
spot += this->hidden->num_buffers;
261
}
262
if (spot > this->hidden->lastchunk + 1) {
263
fprintf(stderr, "Audio dropout, missed %d fragments\n",
264
(spot - (this->hidden->lastchunk + 1)));
265
266
}
}
267
#endif
268
269
270
this->hidden->lastchunk = cursor;
cursor = (cursor + 1) % this->hidden->num_buffers;
cursor *= this->hidden->mixlen;
271
272
/* Lock the audio buffer */
273
274
result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor,
this->hidden->mixlen,
275
(LPVOID *) & this->hidden->locked_buf,
276
&rawlen, NULL, &junk, 0);
277
if (result == DSERR_BUFFERLOST) {
278
279
280
IDirectSoundBuffer_Restore(this->hidden->mixbuf);
result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor,
this->hidden->mixlen,
281
282
(LPVOID *) & this->hidden->
locked_buf, &rawlen, NULL, &junk, 0);
283
284
285
286
287
}
if (result != DS_OK) {
SetDSerror("DirectSound Lock", result);
return (NULL);
}
288
return (this->hidden->locked_buf);
289
290
}
291
static void
292
DSOUND_WaitDone(_THIS)
293
{
294
Uint8 *stream = DSOUND_GetDeviceBuf(this);
295
296
297
/* Wait for the playing chunk to finish */
if (stream != NULL) {
298
299
SDL_memset(stream, this->spec.silence, this->hidden->mixlen);
DSOUND_PlayDevice(this);
300
}
301
DSOUND_WaitDevice(this);
302
303
/* Stop the looping sound buffer */
304
IDirectSoundBuffer_Stop(this->hidden->mixbuf);
305
306
}
307
static void
308
DSOUND_CloseDevice(_THIS)
309
{
310
311
312
313
314
315
316
317
318
if (this->hidden != NULL) {
if (this->hidden->sound != NULL) {
if (this->hidden->mixbuf != NULL) {
/* Clean up the audio buffer */
IDirectSoundBuffer_Release(this->hidden->mixbuf);
this->hidden->mixbuf = NULL;
}
IDirectSound_Release(this->hidden->sound);
this->hidden->sound = NULL;
319
}
320
321
322
SDL_free(this->hidden);
this->hidden = NULL;
323
}
324
325
326
327
328
}
/* This function tries to create a secondary audio buffer, and returns the
number of audio chunks available in the created buffer.
*/
329
static int
330
CreateSecondary(_THIS, HWND focus, WAVEFORMATEX * wavefmt)
331
{
332
LPDIRECTSOUND sndObj = this->hidden->sound;
333
LPDIRECTSOUNDBUFFER *sndbuf = &this->hidden->mixbuf;
334
Uint32 chunksize = this->spec.size;
335
const int numchunks = 8;
336
HRESULT result = DS_OK;
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
DSBUFFERDESC format;
LPVOID pvAudioPtr1, pvAudioPtr2;
DWORD dwAudioBytes1, dwAudioBytes2;
/* 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) {
SetDSerror("DirectSound SetCooperativeLevel", result);
return (-1);
}
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
/* Try to create the secondary buffer */
SDL_memset(&format, 0, sizeof(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)) {
SDL_SetError("Sound buffer size must be between %d and %d",
DSBSIZE_MIN / numchunks, DSBSIZE_MAX / numchunks);
return (-1);
}
format.dwReserved = 0;
format.lpwfxFormat = wavefmt;
result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
if (result != DS_OK) {
SetDSerror("DirectSound CreateSoundBuffer", result);
return (-1);
}
IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
/* Silence the initial audio buffer */
result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
(LPVOID *) & pvAudioPtr1, &dwAudioBytes1,
(LPVOID *) & pvAudioPtr2, &dwAudioBytes2,
DSBLOCK_ENTIREBUFFER);
if (result == DS_OK) {
386
SDL_memset(pvAudioPtr1, this->spec.silence, dwAudioBytes1);
387
388
389
390
391
392
393
IDirectSoundBuffer_Unlock(*sndbuf,
(LPVOID) pvAudioPtr1, dwAudioBytes1,
(LPVOID) pvAudioPtr2, dwAudioBytes2);
}
/* We're ready to go */
return (numchunks);
394
395
}
396
static int
397
DSOUND_OpenDevice(_THIS, const char *devname, int iscapture)
398
{
399
HRESULT result;
400
401
402
WAVEFORMATEX waveformat;
int valid_format = 0;
SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
403
404
405
/* !!! FIXME: handle devname */
/* !!! FIXME: handle iscapture */
406
407
408
/* Initialize all variables that we clean on shutdown */
this->hidden = (struct SDL_PrivateAudioData *)
409
SDL_malloc((sizeof *this->hidden));
410
411
412
if (this->hidden == NULL) {
SDL_OutOfMemory();
return 0;
413
}
414
SDL_memset(this->hidden, 0, (sizeof *this->hidden));
415
416
417
while ((!valid_format) && (test_format)) {
switch (test_format) {
418
419
420
421
422
423
case AUDIO_U8:
case AUDIO_S16:
case AUDIO_S32:
this->spec.format = test_format;
valid_format = 1;
break;
424
425
}
test_format = SDL_NextAudioFormat();
426
427
}
428
429
430
431
if (!valid_format) {
DSOUND_CloseDevice(this);
SDL_SetError("DirectSound: Unsupported audio format");
return 0;
432
}
433
434
435
SDL_memset(&waveformat, 0, sizeof(waveformat));
waveformat.wFormatTag = WAVE_FORMAT_PCM;
436
437
438
waveformat.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
waveformat.nChannels = this->spec.channels;
waveformat.nSamplesPerSec = this->spec.freq;
439
440
441
442
443
444
waveformat.nBlockAlign =
waveformat.nChannels * (waveformat.wBitsPerSample / 8);
waveformat.nAvgBytesPerSec =
waveformat.nSamplesPerSec * waveformat.nBlockAlign;
/* Update the fragment size as size in bytes */
445
SDL_CalculateAudioSpec(&this->spec);
446
447
/* Open the audio device */
448
result = DSoundCreate(NULL, &this->hidden->sound, NULL);
449
if (result != DS_OK) {
450
DSOUND_CloseDevice(this);
451
SetDSerror("DirectSoundCreate", result);
452
return 0;
453
454
455
}
/* Create the audio buffer to which we write */
456
457
458
459
this->hidden->num_buffers = CreateSecondary(this, mainwin, &waveformat);
if (this->hidden->num_buffers < 0) {
DSOUND_CloseDevice(this);
return 0;
460
}
461
462
463
464
/* The buffer will auto-start playing in DSOUND_WaitDevice() */
this->hidden->mixlen = this->spec.size;
465
return 1; /* good to go. */
466
467
468
469
470
471
472
473
474
475
476
}
static void
DSOUND_Deinitialize(void)
{
DSOUND_Unload();
}
static int
477
DSOUND_Init(SDL_AudioDriverImpl * impl)
478
479
480
481
482
483
484
485
{
OSVERSIONINFO ver;
/*
* Unfortunately, the sound drivers on NT have higher latencies than the
* audio buffers used by many SDL applications, so there are gaps in the
* audio - it sounds terrible. Punt for now.
*/
486
SDL_memset(&ver, '\0', sizeof(OSVERSIONINFO));
487
488
ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&ver);
489
if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT) {
490
if (ver.dwMajorVersion <= 4) {
491
return 0; /* NT4.0 or earlier. Disable dsound support. */
492
493
}
}
494
495
496
if (!DSOUND_Load()) {
return 0;
497
}
498
499
500
501
502
503
504
505
506
507
/* Set the function pointers */
impl->OpenDevice = DSOUND_OpenDevice;
impl->PlayDevice = DSOUND_PlayDevice;
impl->WaitDevice = DSOUND_WaitDevice;
impl->WaitDone = DSOUND_WaitDone;
impl->ThreadInit = DSOUND_ThreadInit;
impl->GetDeviceBuf = DSOUND_GetDeviceBuf;
impl->CloseDevice = DSOUND_CloseDevice;
impl->Deinitialize = DSOUND_Deinitialize;
508
impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME */
509
510
return 1;
511
512
}
513
514
515
516
AudioBootStrap DSOUND_bootstrap = {
"dsound", WINDOWS_OS_NAME "DirectSound", DSOUND_Init, 0
};
517
/* vi: set ts=4 sw=4 expandtab: */