e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | 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 | /* Allow access to a raw mixing buffer */ |
25 | |
26 | #include "SDL_timer.h" |
27 | #include "SDL_audio.h" |
28 | #include "../SDL_audio_c.h" |
29 | #include "SDL_dart.h" |
30 | |
31 | // Buffer states: |
32 | #define BUFFER_EMPTY 0 |
33 | #define BUFFER_USED 1 |
34 | |
35 | typedef struct _tMixBufferDesc { |
36 | int iBufferUsage; // BUFFER_EMPTY or BUFFER_USED |
37 | SDL_AudioDevice *pSDLAudioDevice; |
38 | } tMixBufferDesc, *pMixBufferDesc; |
39 | |
40 | |
41 | //--------------------------------------------------------------------- |
42 | // DARTEventFunc |
43 | // |
44 | // This function is called by DART, when an event occures, like end of |
45 | // playback of a buffer, etc... |
46 | //--------------------------------------------------------------------- |
47 | LONG APIENTRY DARTEventFunc(ULONG ulStatus, |
48 | PMCI_MIX_BUFFER pBuffer, |
49 | ULONG ulFlags) |
50 | { |
51 | if (ulFlags && MIX_WRITE_COMPLETE) |
52 | { // Playback of buffer completed! |
53 | |
54 | // Get pointer to buffer description |
55 | pMixBufferDesc pBufDesc; |
56 | |
57 | if (pBuffer) |
58 | { |
59 | pBufDesc = (pMixBufferDesc) (*pBuffer).ulUserParm; |
60 | |
61 | if (pBufDesc) |
62 | { |
63 | SDL_AudioDevice *pSDLAudioDevice = pBufDesc->pSDLAudioDevice; |
64 | // Set the buffer to be empty |
65 | pBufDesc->iBufferUsage = BUFFER_EMPTY; |
66 | // And notify DART feeder thread that it will have to work a bit. |
67 | if (pSDLAudioDevice) |
68 | DosPostEventSem(pSDLAudioDevice->hidden->hevAudioBufferPlayed); |
69 | } |
70 | } |
71 | } |
72 | return TRUE; |
73 | } |
74 | |
75 | |
76 | int DART_OpenAudio(_THIS, SDL_AudioSpec *spec) |
77 | { |
78 | Uint16 test_format = SDL_FirstAudioFormat(spec->format); |
79 | int valid_datatype = 0; |
80 | MCI_AMP_OPEN_PARMS AmpOpenParms; |
81 | MCI_GENERIC_PARMS GenericParms; |
82 | int iDeviceOrd = 0; // Default device to be used |
83 | int bOpenShared = 1; // Try opening it shared |
84 | int iBits = 16; // Default is 16 bits signed |
85 | int iFreq = 44100; // Default is 44KHz |
86 | int iChannels = 2; // Default is 2 channels (Stereo) |
87 | int iNumBufs = 2; // Number of audio buffers: 2 |
88 | int iBufSize; |
89 | int iOpenMode; |
90 | int iSilence; |
91 | int rc; |
92 | |
93 | // First thing is to try to open a given DART device! |
94 | SDL_memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS)); |
95 | // pszDeviceType should contain the device type in low word, and device ordinal in high word! |
96 | AmpOpenParms.pszDeviceType = (PSZ) (MCI_DEVTYPE_AUDIO_AMPMIX | (iDeviceOrd << 16)); |
97 | |
98 | iOpenMode = MCI_WAIT | MCI_OPEN_TYPE_ID; |
99 | if (bOpenShared) iOpenMode |= MCI_OPEN_SHAREABLE; |
100 | |
101 | rc = mciSendCommand( 0, MCI_OPEN, |
102 | iOpenMode, |
103 | (PVOID) &AmpOpenParms, 0); |
104 | if (rc!=MCIERR_SUCCESS) // No audio available?? |
105 | return (-1); |
106 | // Save the device ID we got from DART! |
107 | // We will use this in the next calls! |
108 | iDeviceOrd = AmpOpenParms.usDeviceID; |
109 | |
110 | // Determine the audio parameters from the AudioSpec |
111 | if (spec->channels > 2) |
112 | spec->channels = 2; // !!! FIXME: more than stereo support in OS/2? |
113 | |
114 | while ((!valid_datatype) && (test_format)) { |
115 | spec->format = test_format; |
116 | valid_datatype = 1; |
117 | switch (test_format) { |
118 | case AUDIO_U8: |
119 | // Unsigned 8 bit audio data |
120 | iSilence = 0x80; |
121 | iBits = 8; |
122 | break; |
123 | |
124 | case AUDIO_S16LSB: |
125 | // Signed 16 bit audio data |
126 | iSilence = 0x00; |
127 | iBits = 16; |
128 | break; |
129 | |
130 | default: |
131 | valid_datatype = 0; |
132 | test_format = SDL_NextAudioFormat(); |
133 | break; |
134 | } |
135 | } |
136 | |
137 | if (!valid_datatype) { // shouldn't happen, but just in case... |
138 | // Close DART, and exit with error code! |
139 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
140 | SDL_SetError("Unsupported audio format"); |
141 | return (-1); |
142 | } |
143 | |
144 | iFreq = spec->freq; |
145 | iChannels = spec->channels; |
146 | /* Update the fragment size as size in bytes */ |
147 | SDL_CalculateAudioSpec(spec); |
148 | iBufSize = spec->size; |
149 | |
150 | // Now query this device if it supports the given freq/bits/channels! |
151 | SDL_memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS)); |
152 | _this->hidden->MixSetupParms.ulBitsPerSample = iBits; |
153 | _this->hidden->MixSetupParms.ulFormatTag = MCI_WAVE_FORMAT_PCM; |
154 | _this->hidden->MixSetupParms.ulSamplesPerSec = iFreq; |
155 | _this->hidden->MixSetupParms.ulChannels = iChannels; |
156 | _this->hidden->MixSetupParms.ulFormatMode = MCI_PLAY; |
157 | _this->hidden->MixSetupParms.ulDeviceType = MCI_DEVTYPE_WAVEFORM_AUDIO; |
158 | _this->hidden->MixSetupParms.pmixEvent = DARTEventFunc; |
159 | rc = mciSendCommand (iDeviceOrd, MCI_MIXSETUP, |
160 | MCI_WAIT | MCI_MIXSETUP_QUERYMODE, |
161 | &(_this->hidden->MixSetupParms), 0); |
162 | if (rc!=MCIERR_SUCCESS) |
163 | { // The device cannot handle this format! |
164 | // Close DART, and exit with error code! |
165 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
166 | SDL_SetError("Audio device doesn't support requested audio format"); |
167 | return(-1); |
168 | } |
169 | // The device can handle this format, so initialize! |
170 | rc = mciSendCommand(iDeviceOrd, MCI_MIXSETUP, |
171 | MCI_WAIT | MCI_MIXSETUP_INIT, |
172 | &(_this->hidden->MixSetupParms), 0); |
173 | if (rc!=MCIERR_SUCCESS) |
174 | { // The device could not be opened! |
175 | // Close DART, and exit with error code! |
176 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
177 | SDL_SetError("Audio device could not be set up"); |
178 | return(-1); |
179 | } |
180 | // Ok, the device is initialized. |
181 | // Now we should allocate buffers. For this, we need a place where |
182 | // the buffer descriptors will be: |
183 | _this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) SDL_malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs); |
184 | if (!(_this->hidden->pMixBuffers)) |
185 | { // Not enough memory! |
186 | // Close DART, and exit with error code! |
187 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
188 | SDL_SetError("Not enough memory for audio buffer descriptors"); |
189 | return(-1); |
190 | } |
191 | // Now that we have the place for buffer list, we can ask DART for the |
192 | // buffers! |
193 | _this->hidden->BufferParms.ulNumBuffers = iNumBufs; // Number of buffers |
194 | _this->hidden->BufferParms.ulBufferSize = iBufSize; // each with this size |
195 | _this->hidden->BufferParms.pBufList = _this->hidden->pMixBuffers; // getting descriptorts into this list |
196 | // Allocate buffers! |
197 | rc = mciSendCommand(iDeviceOrd, MCI_BUFFER, |
198 | MCI_WAIT | MCI_ALLOCATE_MEMORY, |
199 | &(_this->hidden->BufferParms), 0); |
200 | if ((rc!=MCIERR_SUCCESS) || (iNumBufs != _this->hidden->BufferParms.ulNumBuffers) || (_this->hidden->BufferParms.ulBufferSize==0)) |
201 | { // Could not allocate memory! |
202 | // Close DART, and exit with error code! |
203 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
204 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
205 | SDL_SetError("DART could not allocate buffers"); |
206 | return(-1); |
207 | } |
208 | // Ok, we have all the buffers allocated, let's mark them! |
209 | { |
210 | int i; |
211 | for (i=0; i<iNumBufs; i++) |
212 | { |
213 | pMixBufferDesc pBufferDesc = (pMixBufferDesc) SDL_malloc(sizeof(tMixBufferDesc));; |
214 | // Check if this buffer was really allocated by DART |
215 | if ((!(_this->hidden->pMixBuffers[i].pBuffer)) || (!pBufferDesc)) |
216 | { // Wrong buffer! |
217 | // Close DART, and exit with error code! |
218 | // Free buffer descriptions |
219 | { int j; |
220 | for (j=0; j<i; j++) SDL_free((void *)(_this->hidden->pMixBuffers[j].ulUserParm)); |
221 | } |
222 | // and cleanup |
223 | mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); |
224 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
225 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
226 | SDL_SetError("Error at internal buffer check"); |
227 | return(-1); |
228 | } |
229 | pBufferDesc->iBufferUsage = BUFFER_EMPTY; |
230 | pBufferDesc->pSDLAudioDevice = _this; |
231 | |
232 | _this->hidden->pMixBuffers[i].ulBufferLength = _this->hidden->BufferParms.ulBufferSize; |
233 | _this->hidden->pMixBuffers[i].ulUserParm = (ULONG) pBufferDesc; // User parameter: Description of buffer |
234 | _this->hidden->pMixBuffers[i].ulFlags = 0; // Some stuff should be flagged here for DART, like end of |
235 | // audio data, but as we will continously send |
236 | // audio data, there will be no end.:) |
237 | SDL_memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize); |
238 | } |
239 | } |
240 | _this->hidden->iNextFreeBuffer = 0; |
241 | _this->hidden->iLastPlayedBuf = -1; |
242 | // Create event semaphore |
243 | if (DosCreateEventSem(NULL, &(_this->hidden->hevAudioBufferPlayed), 0, FALSE)!=NO_ERROR) |
244 | { |
245 | // Could not create event semaphore! |
246 | { |
247 | int i; |
248 | for (i=0; i<iNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
249 | } |
250 | mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); |
251 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
252 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
253 | SDL_SetError("Could not create event semaphore"); |
254 | return(-1); |
255 | } |
256 | |
257 | // Store the new settings in global variables |
258 | _this->hidden->iCurrDeviceOrd = iDeviceOrd; |
259 | _this->hidden->iCurrFreq = iFreq; |
260 | _this->hidden->iCurrBits = iBits; |
261 | _this->hidden->iCurrChannels = iChannels; |
262 | _this->hidden->iCurrNumBufs = iNumBufs; |
263 | _this->hidden->iCurrBufSize = iBufSize; |
264 | |
265 | return (0); |
266 | } |
267 | |
268 | |
269 | |
270 | void DART_ThreadInit(_THIS) |
271 | { |
272 | return; |
273 | } |
274 | |
275 | /* This function waits until it is possible to write a full sound buffer */ |
276 | void DART_WaitAudio(_THIS) |
277 | { |
278 | int i; |
279 | pMixBufferDesc pBufDesc; |
280 | ULONG ulPostCount; |
281 | |
282 | DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); |
283 | // If there is already an empty buffer, then return now! |
284 | for (i=0; i<_this->hidden->iCurrNumBufs; i++) |
285 | { |
286 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[i].ulUserParm; |
287 | if (pBufDesc->iBufferUsage == BUFFER_EMPTY) |
288 | return; |
289 | } |
290 | // If there is no empty buffer, wait for one to be empty! |
291 | DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // Wait max 1 sec!!! Important! |
292 | return; |
293 | } |
294 | |
295 | void DART_PlayAudio(_THIS) |
296 | { |
297 | int iFreeBuf = _this->hidden->iNextFreeBuffer; |
298 | pMixBufferDesc pBufDesc; |
299 | |
300 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; |
301 | pBufDesc->iBufferUsage = BUFFER_USED; |
302 | // Send it to DART to be queued |
303 | _this->hidden->MixSetupParms.pmixWrite(_this->hidden->MixSetupParms.ulMixHandle, |
304 | &(_this->hidden->pMixBuffers[iFreeBuf]), 1); |
305 | |
306 | _this->hidden->iLastPlayedBuf = iFreeBuf; |
307 | iFreeBuf = (iFreeBuf+1) % _this->hidden->iCurrNumBufs; |
308 | _this->hidden->iNextFreeBuffer = iFreeBuf; |
309 | } |
310 | |
311 | Uint8 *DART_GetAudioBuf(_THIS) |
312 | { |
313 | int iFreeBuf; |
314 | Uint8 *pResult; |
315 | pMixBufferDesc pBufDesc; |
316 | |
317 | if (_this) |
318 | { |
319 | if (_this->hidden) |
320 | { |
321 | iFreeBuf = _this->hidden->iNextFreeBuffer; |
322 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; |
323 | |
324 | if (pBufDesc) |
325 | { |
326 | if (pBufDesc->iBufferUsage == BUFFER_EMPTY) |
327 | { |
328 | pResult = _this->hidden->pMixBuffers[iFreeBuf].pBuffer; |
329 | return pResult; |
330 | } |
331 | } else |
332 | printf("[DART_GetAudioBuf] : ERROR! pBufDesc = %p\n", pBufDesc); |
333 | } else |
334 | printf("[DART_GetAudioBuf] : ERROR! _this->hidden = %p\n", _this->hidden); |
335 | } else |
336 | printf("[DART_GetAudioBuf] : ERROR! _this = %p\n", _this); |
337 | return NULL; |
338 | } |
339 | |
340 | void DART_WaitDone(_THIS) |
341 | { |
342 | pMixBufferDesc pBufDesc; |
343 | ULONG ulPostCount; |
344 | APIRET rc; |
345 | |
346 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[_this->hidden->iLastPlayedBuf].ulUserParm; |
347 | rc = NO_ERROR; |
348 | while ((pBufDesc->iBufferUsage != BUFFER_EMPTY) && (rc==NO_ERROR)) |
349 | { |
350 | DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); |
351 | rc = DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // 1 sec timeout! Important! |
352 | } |
353 | } |
354 | |
355 | void DART_CloseAudio(_THIS) |
356 | { |
357 | MCI_GENERIC_PARMS GenericParms; |
358 | int rc; |
359 | |
360 | // Stop DART playback |
361 | rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_STOP, MCI_WAIT, &GenericParms, 0); |
362 | if (rc!=MCIERR_SUCCESS) |
363 | { |
364 | #ifdef SFX_DEBUG_BUILD |
365 | printf("Could not stop DART playback!\n"); |
366 | fflush(stdout); |
367 | #endif |
368 | } |
369 | |
370 | // Close event semaphore |
371 | DosCloseEventSem(_this->hidden->hevAudioBufferPlayed); |
372 | |
373 | // Free memory of buffer descriptions |
374 | { |
375 | int i; |
376 | for (i=0; i<_this->hidden->iCurrNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
377 | } |
378 | |
379 | // Deallocate buffers |
380 | rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); |
381 | |
382 | // Free bufferlist |
383 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
384 | |
385 | // Close dart |
386 | rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_CLOSE, MCI_WAIT, &(GenericParms), 0); |
387 | } |
388 | |
389 | /* Audio driver bootstrap functions */ |
390 | |
391 | int Audio_Available(void) |
392 | { |
393 | return(1); |
394 | } |
395 | |
396 | void Audio_DeleteDevice(SDL_AudioDevice *device) |
397 | { |
398 | SDL_free(device->hidden); |
399 | SDL_free(device); |
400 | } |
401 | |
402 | SDL_AudioDevice *Audio_CreateDevice(int devindex) |
403 | { |
404 | SDL_AudioDevice *this; |
405 | |
406 | /* Initialize all variables that we clean on shutdown */ |
407 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
408 | if ( this ) |
409 | { |
410 | SDL_memset(this, 0, (sizeof *this)); |
411 | this->hidden = (struct SDL_PrivateAudioData *) |
412 | SDL_malloc((sizeof *this->hidden)); |
413 | } |
414 | if ( (this == NULL) || (this->hidden == NULL) ) |
415 | { |
416 | SDL_OutOfMemory(); |
417 | if ( this ) |
418 | SDL_free(this); |
419 | return(0); |
420 | } |
421 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
422 | |
423 | /* Set the function pointers */ |
424 | this->OpenAudio = DART_OpenAudio; |
425 | this->ThreadInit = DART_ThreadInit; |
426 | this->WaitAudio = DART_WaitAudio; |
427 | this->PlayAudio = DART_PlayAudio; |
428 | this->GetAudioBuf = DART_GetAudioBuf; |
429 | this->WaitDone = DART_WaitDone; |
430 | this->CloseAudio = DART_CloseAudio; |
431 | |
432 | this->free = Audio_DeleteDevice; |
433 | |
434 | return this; |
435 | } |
436 | |
437 | AudioBootStrap DART_bootstrap = { |
438 | "dart", "OS/2 Direct Audio RouTines (DART)", |
439 | Audio_Available, Audio_CreateDevice |
440 | }; |
441 | |