Mercurial > sdl-ios-xcode
annotate src/audio/qsa/SDL_qsa_audio.c @ 3697:f7b03b6838cb
Fixed bug #926
Updated copyright to LGPL version 2.1 and year 2010
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 24 Jan 2010 21:10:53 +0000 |
| parents | 7f684f249ec9 |
| children | 4160ba33b597 |
| rev | line source |
|---|---|
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1 /* |
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2 SDL - Simple DirectMedia Layer |
| 3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
| 3697 | 6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
| 3697 | 8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 3697 | 13 Lesser General Public License for more details. |
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14 |
| 3697 | 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 | |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 #include "SDL_config.h" |
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24 |
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25 #include <errno.h> |
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26 #include <unistd.h> |
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27 #include <fcntl.h> |
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28 #include <signal.h> |
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29 #include <sys/types.h> |
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30 #include <sys/time.h> |
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31 #include <sched.h> |
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32 #include <sys/select.h> |
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33 #include <sys/neutrino.h> |
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34 #include <sys/asoundlib.h> |
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35 |
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36 #include "SDL_timer.h" |
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37 #include "SDL_audio.h" |
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38 #include "../SDL_audiomem.h" |
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39 #include "../SDL_audio_c.h" |
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40 #include "SDL_qsa_audio.h" |
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41 |
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42 /* The tag name used by QSA audio framework */ |
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43 #define DRIVER_NAME "qsa" |
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44 |
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45 /* default channel communication parameters */ |
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46 #define DEFAULT_CPARAMS_RATE 44100 |
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47 #define DEFAULT_CPARAMS_VOICES 1 |
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48 |
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49 #define DEFAULT_CPARAMS_FRAG_SIZE 4096 |
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50 #define DEFAULT_CPARAMS_FRAGS_MIN 1 |
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51 #define DEFAULT_CPARAMS_FRAGS_MAX 1 |
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52 |
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53 #define QSA_NO_WORKAROUNDS 0x00000000 |
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54 #define QSA_MMAP_WORKAROUND 0x00000001 |
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55 |
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56 struct BuggyCards |
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57 { |
| 3139 | 58 char *cardname; |
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59 unsigned long bugtype; |
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60 }; |
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61 |
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62 #define QSA_WA_CARDS 3 |
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63 #define QSA_MAX_CARD_NAME_LENGTH 33 |
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64 |
| 3139 | 65 struct BuggyCards buggycards[QSA_WA_CARDS] = { |
| 66 {"Sound Blaster Live!", QSA_MMAP_WORKAROUND}, | |
| 67 {"Vortex 8820", QSA_MMAP_WORKAROUND}, | |
| 68 {"Vortex 8830", QSA_MMAP_WORKAROUND}, | |
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69 }; |
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70 |
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71 /* List of found devices */ |
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72 #define QSA_MAX_DEVICES 32 |
| 3139 | 73 #define QSA_MAX_NAME_LENGTH 81+16 /* Hardcoded in QSA, can't be changed */ |
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74 |
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75 typedef struct _QSA_Device |
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76 { |
| 3139 | 77 char name[QSA_MAX_NAME_LENGTH]; /* Long audio device name for SDL */ |
| 78 int cardno; | |
| 79 int deviceno; | |
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80 } QSA_Device; |
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81 |
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82 QSA_Device qsa_playback_device[QSA_MAX_DEVICES]; |
| 3139 | 83 uint32_t qsa_playback_devices; |
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84 |
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85 QSA_Device qsa_capture_device[QSA_MAX_DEVICES]; |
| 3139 | 86 uint32_t qsa_capture_devices; |
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87 |
| 3139 | 88 static inline void |
| 89 QSA_SetError(const char *fn, int status) | |
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90 { |
| 3139 | 91 SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status)); |
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92 } |
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93 |
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94 /* card names check to apply the workarounds */ |
| 3139 | 95 static int |
| 96 QSA_CheckBuggyCards(_THIS, unsigned long checkfor) | |
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97 { |
| 3139 | 98 char scardname[QSA_MAX_CARD_NAME_LENGTH]; |
| 99 int it; | |
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100 |
| 3139 | 101 if (snd_card_get_name |
| 102 (this->hidden->cardno, scardname, QSA_MAX_CARD_NAME_LENGTH - 1) < 0) { | |
| 103 return 0; | |
| 104 } | |
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105 |
| 3139 | 106 for (it = 0; it < QSA_WA_CARDS; it++) { |
| 107 if (SDL_strcmp(buggycards[it].cardname, scardname) == 0) { | |
| 108 if (buggycards[it].bugtype == checkfor) { | |
| 109 return 1; | |
| 110 } | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 return 0; | |
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115 } |
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116 |
| 3139 | 117 static void |
| 118 QSA_ThreadInit(_THIS) | |
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119 { |
| 3139 | 120 struct sched_param param; |
| 121 int status; | |
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122 |
| 3139 | 123 /* Increase default 10 priority to 25 to avoid jerky sound */ |
| 124 status = SchedGet(0, 0, ¶m); | |
| 125 param.sched_priority = param.sched_curpriority + 15; | |
| 126 status = SchedSet(0, 0, SCHED_NOCHANGE, ¶m); | |
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127 } |
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128 |
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129 /* PCM channel parameters initialize function */ |
| 3139 | 130 static void |
| 131 QSA_InitAudioParams(snd_pcm_channel_params_t * cpars) | |
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132 { |
| 3139 | 133 SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t)); |
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134 |
| 3139 | 135 cpars->channel = SND_PCM_CHANNEL_PLAYBACK; |
| 136 cpars->mode = SND_PCM_MODE_BLOCK; | |
| 137 cpars->start_mode = SND_PCM_START_DATA; | |
| 138 cpars->stop_mode = SND_PCM_STOP_STOP; | |
| 139 cpars->format.format = SND_PCM_SFMT_S16_LE; | |
| 140 cpars->format.interleave = 1; | |
| 141 cpars->format.rate = DEFAULT_CPARAMS_RATE; | |
| 142 cpars->format.voices = DEFAULT_CPARAMS_VOICES; | |
| 143 cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE; | |
| 144 cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN; | |
| 145 cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX; | |
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146 } |
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147 |
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148 /* This function waits until it is possible to write a full sound buffer */ |
| 3139 | 149 static void |
| 150 QSA_WaitDevice(_THIS) | |
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151 { |
| 3139 | 152 fd_set wfds; |
| 153 fd_set rfds; | |
| 154 int selectret; | |
| 155 struct timeval timeout; | |
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156 |
| 3139 | 157 if (!this->hidden->iscapture) { |
| 158 FD_ZERO(&wfds); | |
| 159 FD_SET(this->hidden->audio_fd, &wfds); | |
| 160 } else { | |
| 161 FD_ZERO(&rfds); | |
| 162 FD_SET(this->hidden->audio_fd, &rfds); | |
| 163 } | |
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164 |
| 3139 | 165 do { |
| 166 /* Setup timeout for playing one fragment equal to 2 seconds */ | |
| 167 /* If timeout occured than something wrong with hardware or driver */ | |
| 168 /* For example, Vortex 8820 audio driver stucks on second DAC because */ | |
| 169 /* it doesn't exist ! */ | |
| 170 timeout.tv_sec = 2; | |
| 171 timeout.tv_usec = 0; | |
| 172 this->hidden->timeout_on_wait = 0; | |
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173 |
| 3139 | 174 if (!this->hidden->iscapture) { |
| 175 selectret = | |
| 176 select(this->hidden->audio_fd + 1, NULL, &wfds, NULL, | |
| 177 &timeout); | |
| 178 } else { | |
| 179 selectret = | |
| 180 select(this->hidden->audio_fd + 1, &rfds, NULL, NULL, | |
| 181 &timeout); | |
| 182 } | |
| 183 | |
| 184 switch (selectret) { | |
| 185 case -1: | |
| 186 { | |
| 187 SDL_SetError("QSA: select() failed: %s\n", strerror(errno)); | |
| 188 return; | |
| 189 } | |
| 190 break; | |
| 191 case 0: | |
| 192 { | |
| 193 SDL_SetError("QSA: timeout on buffer waiting occured\n"); | |
| 194 this->hidden->timeout_on_wait = 1; | |
| 195 return; | |
| 196 } | |
| 197 break; | |
| 198 default: | |
| 199 { | |
| 200 if (!this->hidden->iscapture) { | |
| 201 if (FD_ISSET(this->hidden->audio_fd, &wfds)) { | |
| 202 return; | |
|
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203 } |
| 3139 | 204 } else { |
| 205 if (FD_ISSET(this->hidden->audio_fd, &rfds)) { | |
| 206 return; | |
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207 } |
| 3139 | 208 } |
| 209 } | |
| 210 break; | |
| 211 } | |
| 212 } while (1); | |
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213 } |
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214 |
| 3139 | 215 static void |
| 216 QSA_PlayDevice(_THIS) | |
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217 { |
| 3139 | 218 snd_pcm_channel_status_t cstatus; |
| 219 int written; | |
| 220 int status; | |
| 221 int towrite; | |
| 222 void *pcmbuffer; | |
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223 |
| 3139 | 224 if ((!this->enabled) || (!this->hidden)) { |
| 225 return; | |
| 226 } | |
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227 |
| 3139 | 228 towrite = this->spec.size; |
| 229 pcmbuffer = this->hidden->pcm_buf; | |
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230 |
| 3139 | 231 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */ |
| 232 do { | |
| 233 written = | |
| 234 snd_pcm_plugin_write(this->hidden->audio_handle, pcmbuffer, | |
| 235 towrite); | |
| 236 if (written != towrite) { | |
| 237 /* Check if samples playback got stuck somewhere in hardware or in */ | |
| 238 /* the audio device driver */ | |
| 239 if ((errno == EAGAIN) && (written == 0)) { | |
| 240 if (this->hidden->timeout_on_wait != 0) { | |
| 241 SDL_SetError("QSA: buffer playback timeout\n"); | |
| 242 return; | |
| 243 } | |
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244 } |
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245 |
| 3139 | 246 /* Check for errors or conditions */ |
| 247 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) { | |
| 248 /* Let a little CPU time go by and try to write again */ | |
| 249 SDL_Delay(1); | |
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250 |
| 3139 | 251 /* if we wrote some data */ |
| 252 towrite -= written; | |
| 253 pcmbuffer += written * this->spec.channels; | |
| 254 continue; | |
| 255 } else { | |
| 256 if ((errno == EINVAL) || (errno == EIO)) { | |
| 257 SDL_memset(&cstatus, 0, sizeof(cstatus)); | |
| 258 if (!this->hidden->iscapture) { | |
| 259 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK; | |
| 260 } else { | |
| 261 cstatus.channel = SND_PCM_CHANNEL_CAPTURE; | |
| 262 } | |
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263 |
| 3139 | 264 status = |
| 265 snd_pcm_plugin_status(this->hidden->audio_handle, | |
| 266 &cstatus); | |
| 267 if (status < 0) { | |
| 268 QSA_SetError("snd_pcm_plugin_status", status); | |
| 269 return; | |
| 270 } | |
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271 |
| 3139 | 272 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || |
| 273 (cstatus.status == SND_PCM_STATUS_READY)) { | |
| 274 if (!this->hidden->iscapture) { | |
| 275 status = | |
| 276 snd_pcm_plugin_prepare(this->hidden-> | |
| 277 audio_handle, | |
| 278 SND_PCM_CHANNEL_PLAYBACK); | |
| 279 } else { | |
| 280 status = | |
| 281 snd_pcm_plugin_prepare(this->hidden-> | |
| 282 audio_handle, | |
| 283 SND_PCM_CHANNEL_CAPTURE); | |
| 284 } | |
| 285 if (status < 0) { | |
| 286 QSA_SetError("snd_pcm_plugin_prepare", status); | |
| 287 return; | |
| 288 } | |
| 289 } | |
| 290 continue; | |
| 291 } else { | |
| 292 return; | |
| 293 } | |
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294 } |
| 3139 | 295 } else { |
| 296 /* we wrote all remaining data */ | |
| 297 towrite -= written; | |
| 298 pcmbuffer += written * this->spec.channels; | |
| 299 } | |
| 300 } while ((towrite > 0) && (this->enabled)); | |
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301 |
| 3139 | 302 /* If we couldn't write, assume fatal error for now */ |
| 303 if (towrite != 0) { | |
| 304 this->enabled = 0; | |
| 305 } | |
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306 } |
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307 |
| 3139 | 308 static Uint8 * |
| 309 QSA_GetDeviceBuf(_THIS) | |
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310 { |
| 3139 | 311 return this->hidden->pcm_buf; |
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312 } |
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313 |
| 3139 | 314 static void |
| 315 QSA_CloseDevice(_THIS) | |
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316 { |
| 3139 | 317 if (this->hidden != NULL) { |
| 318 if (this->hidden->audio_handle != NULL) { | |
| 319 if (!this->hidden->iscapture) { | |
| 320 /* Finish playing available samples */ | |
| 321 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 322 SND_PCM_CHANNEL_PLAYBACK); | |
| 323 } else { | |
| 324 /* Cancel unread samples during capture */ | |
| 325 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 326 SND_PCM_CHANNEL_CAPTURE); | |
| 327 } | |
| 328 snd_pcm_close(this->hidden->audio_handle); | |
| 329 this->hidden->audio_handle = NULL; | |
| 330 } | |
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331 |
| 3139 | 332 if (this->hidden->pcm_buf != NULL) { |
| 333 SDL_FreeAudioMem(this->hidden->pcm_buf); | |
| 334 this->hidden->pcm_buf = NULL; | |
| 335 } | |
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336 |
| 3139 | 337 SDL_free(this->hidden); |
| 338 this->hidden = NULL; | |
| 339 } | |
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340 } |
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341 |
| 3139 | 342 static int |
| 343 QSA_OpenDevice(_THIS, const char *devname, int iscapture) | |
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344 { |
| 3139 | 345 int status = 0; |
| 346 int format = 0; | |
| 347 SDL_AudioFormat test_format = 0; | |
| 348 int found = 0; | |
| 349 snd_pcm_channel_setup_t csetup; | |
| 350 snd_pcm_channel_params_t cparams; | |
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351 |
| 3139 | 352 /* Initialize all variables that we clean on shutdown */ |
| 353 this->hidden = | |
| 354 (struct SDL_PrivateAudioData *) SDL_calloc(1, | |
| 355 (sizeof | |
| 356 (struct | |
| 357 SDL_PrivateAudioData))); | |
| 358 if (this->hidden == NULL) { | |
| 359 SDL_OutOfMemory(); | |
| 360 return 0; | |
| 361 } | |
| 362 SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData)); | |
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363 |
| 3139 | 364 /* Initialize channel transfer parameters to default */ |
| 365 QSA_InitAudioParams(&cparams); | |
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366 |
| 3139 | 367 /* Initialize channel direction: capture or playback */ |
| 368 this->hidden->iscapture = iscapture; | |
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369 |
| 3139 | 370 /* Find deviceid and cardid by device name for playback */ |
| 371 if ((!this->hidden->iscapture) && (devname != NULL)) { | |
| 372 uint32_t device; | |
| 373 int32_t status; | |
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374 |
| 3139 | 375 /* Search in the playback devices */ |
| 376 device = 0; | |
| 377 do { | |
| 378 status = SDL_strcmp(qsa_playback_device[device].name, devname); | |
| 379 if (status == 0) { | |
| 380 /* Found requested device */ | |
| 381 this->hidden->deviceno = qsa_playback_device[device].deviceno; | |
| 382 this->hidden->cardno = qsa_playback_device[device].cardno; | |
| 383 break; | |
| 384 } | |
| 385 device++; | |
| 386 if (device >= qsa_playback_devices) { | |
| 387 QSA_CloseDevice(this); | |
| 388 SDL_SetError("No such playback device"); | |
| 389 return 0; | |
| 390 } | |
| 391 } while (1); | |
| 392 } | |
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393 |
| 3139 | 394 /* Find deviceid and cardid by device name for capture */ |
| 395 if ((this->hidden->iscapture) && (devname != NULL)) { | |
| 396 /* Search in the capture devices */ | |
| 397 uint32_t device; | |
| 398 int32_t status; | |
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399 |
| 3139 | 400 /* Searching in the playback devices */ |
| 401 device = 0; | |
| 402 do { | |
| 403 status = SDL_strcmp(qsa_capture_device[device].name, devname); | |
| 404 if (status == 0) { | |
| 405 /* Found requested device */ | |
| 406 this->hidden->deviceno = qsa_capture_device[device].deviceno; | |
| 407 this->hidden->cardno = qsa_capture_device[device].cardno; | |
| 408 break; | |
| 409 } | |
| 410 device++; | |
| 411 if (device >= qsa_capture_devices) { | |
| 412 QSA_CloseDevice(this); | |
| 413 SDL_SetError("No such capture device"); | |
| 414 return 0; | |
| 415 } | |
| 416 } while (1); | |
| 417 } | |
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418 |
| 3139 | 419 /* Check if SDL requested default audio device */ |
| 420 if (devname == NULL) { | |
| 421 /* Open system default audio device */ | |
| 422 if (!this->hidden->iscapture) { | |
| 423 status = snd_pcm_open_preferred(&this->hidden->audio_handle, | |
| 424 &this->hidden->cardno, | |
| 425 &this->hidden->deviceno, | |
| 426 SND_PCM_OPEN_PLAYBACK); | |
| 427 } else { | |
| 428 status = snd_pcm_open_preferred(&this->hidden->audio_handle, | |
| 429 &this->hidden->cardno, | |
| 430 &this->hidden->deviceno, | |
| 431 SND_PCM_OPEN_CAPTURE); | |
| 432 } | |
| 433 } else { | |
| 434 /* Open requested audio device */ | |
| 435 if (!this->hidden->iscapture) { | |
| 436 status = | |
| 437 snd_pcm_open(&this->hidden->audio_handle, | |
| 438 this->hidden->cardno, this->hidden->deviceno, | |
| 439 SND_PCM_OPEN_PLAYBACK); | |
| 440 } else { | |
| 441 status = | |
| 442 snd_pcm_open(&this->hidden->audio_handle, | |
| 443 this->hidden->cardno, this->hidden->deviceno, | |
| 444 SND_PCM_OPEN_CAPTURE); | |
| 445 } | |
| 446 } | |
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447 |
| 3139 | 448 /* Check if requested device is opened */ |
| 449 if (status < 0) { | |
| 450 this->hidden->audio_handle = NULL; | |
| 451 QSA_CloseDevice(this); | |
| 452 QSA_SetError("snd_pcm_open", status); | |
| 453 return 0; | |
| 454 } | |
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455 |
| 3139 | 456 if (!QSA_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) { |
| 457 /* Disable QSA MMAP plugin for buggy audio drivers */ | |
| 458 status = | |
| 459 snd_pcm_plugin_set_disable(this->hidden->audio_handle, | |
| 460 PLUGIN_DISABLE_MMAP); | |
| 461 if (status < 0) { | |
| 462 QSA_CloseDevice(this); | |
| 463 QSA_SetError("snd_pcm_plugin_set_disable", status); | |
| 464 return 0; | |
| 465 } | |
| 466 } | |
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467 |
| 3139 | 468 /* Try for a closest match on audio format */ |
| 469 format = 0; | |
| 470 /* can't use format as SND_PCM_SFMT_U8 = 0 in qsa */ | |
| 471 found = 0; | |
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472 |
| 3139 | 473 for (test_format = SDL_FirstAudioFormat(this->spec.format); !found;) { |
| 474 /* if match found set format to equivalent QSA format */ | |
| 475 switch (test_format) { | |
| 476 case AUDIO_U8: | |
| 477 { | |
| 478 format = SND_PCM_SFMT_U8; | |
| 479 found = 1; | |
| 480 } | |
| 481 break; | |
| 482 case AUDIO_S8: | |
| 483 { | |
| 484 format = SND_PCM_SFMT_S8; | |
| 485 found = 1; | |
| 486 } | |
| 487 break; | |
| 488 case AUDIO_S16LSB: | |
| 489 { | |
| 490 format = SND_PCM_SFMT_S16_LE; | |
| 491 found = 1; | |
| 492 } | |
| 493 break; | |
| 494 case AUDIO_S16MSB: | |
| 495 { | |
| 496 format = SND_PCM_SFMT_S16_BE; | |
| 497 found = 1; | |
| 498 } | |
| 499 break; | |
| 500 case AUDIO_U16LSB: | |
| 501 { | |
| 502 format = SND_PCM_SFMT_U16_LE; | |
| 503 found = 1; | |
| 504 } | |
| 505 break; | |
| 506 case AUDIO_U16MSB: | |
| 507 { | |
| 508 format = SND_PCM_SFMT_U16_BE; | |
| 509 found = 1; | |
| 510 } | |
| 511 break; | |
| 512 case AUDIO_S32LSB: | |
| 513 { | |
| 514 format = SND_PCM_SFMT_S32_LE; | |
| 515 found = 1; | |
| 516 } | |
| 517 break; | |
| 518 case AUDIO_S32MSB: | |
| 519 { | |
| 520 format = SND_PCM_SFMT_S32_BE; | |
| 521 found = 1; | |
| 522 } | |
| 523 break; | |
| 524 case AUDIO_F32LSB: | |
| 525 { | |
| 526 format = SND_PCM_SFMT_FLOAT_LE; | |
| 527 found = 1; | |
| 528 } | |
| 529 break; | |
| 530 case AUDIO_F32MSB: | |
| 531 { | |
| 532 format = SND_PCM_SFMT_FLOAT_BE; | |
| 533 found = 1; | |
| 534 } | |
| 535 break; | |
| 536 default: | |
| 537 { | |
| 538 break; | |
| 539 } | |
| 540 } | |
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541 |
| 3139 | 542 if (!found) { |
| 543 test_format = SDL_NextAudioFormat(); | |
| 544 } | |
| 545 } | |
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546 |
| 3139 | 547 /* assumes test_format not 0 on success */ |
| 548 if (test_format == 0) { | |
| 549 QSA_CloseDevice(this); | |
| 550 SDL_SetError("QSA: Couldn't find any hardware audio formats"); | |
| 551 return 0; | |
| 552 } | |
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553 |
| 3139 | 554 this->spec.format = test_format; |
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555 |
| 3139 | 556 /* Set the audio format */ |
| 557 cparams.format.format = format; | |
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558 |
| 3139 | 559 /* Set mono/stereo/4ch/6ch/8ch audio */ |
| 560 cparams.format.voices = this->spec.channels; | |
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561 |
| 3139 | 562 /* Set rate */ |
| 563 cparams.format.rate = this->spec.freq; | |
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564 |
| 3139 | 565 /* Setup the transfer parameters according to cparams */ |
| 566 status = snd_pcm_plugin_params(this->hidden->audio_handle, &cparams); | |
| 567 if (status < 0) { | |
| 568 QSA_CloseDevice(this); | |
| 569 QSA_SetError("snd_pcm_channel_params", status); | |
| 570 return 0; | |
| 571 } | |
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572 |
| 3139 | 573 /* Make sure channel is setup right one last time */ |
| 574 SDL_memset(&csetup, '\0', sizeof(csetup)); | |
| 575 if (!this->hidden->iscapture) { | |
| 576 csetup.channel = SND_PCM_CHANNEL_PLAYBACK; | |
| 577 } else { | |
| 578 csetup.channel = SND_PCM_CHANNEL_CAPTURE; | |
| 579 } | |
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580 |
| 3139 | 581 /* Setup an audio channel */ |
| 582 if (snd_pcm_plugin_setup(this->hidden->audio_handle, &csetup) < 0) { | |
| 583 QSA_CloseDevice(this); | |
| 584 SDL_SetError("QSA: Unable to setup channel\n"); | |
| 585 return 0; | |
| 586 } | |
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587 |
| 3139 | 588 /* Calculate the final parameters for this audio specification */ |
| 589 SDL_CalculateAudioSpec(&this->spec); | |
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590 |
| 3139 | 591 this->hidden->pcm_len = this->spec.size; |
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592 |
| 3139 | 593 if (this->hidden->pcm_len == 0) { |
| 594 this->hidden->pcm_len = | |
| 595 csetup.buf.block.frag_size * this->spec.channels * | |
| 596 (snd_pcm_format_width(format) / 8); | |
| 597 } | |
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598 |
| 3139 | 599 /* |
| 600 * Allocate memory to the audio buffer and initialize with silence | |
| 601 * (Note that buffer size must be a multiple of fragment size, so find | |
| 602 * closest multiple) | |
| 603 */ | |
| 604 this->hidden->pcm_buf = | |
| 605 (Uint8 *) SDL_AllocAudioMem(this->hidden->pcm_len); | |
| 606 if (this->hidden->pcm_buf == NULL) { | |
| 607 QSA_CloseDevice(this); | |
| 608 SDL_OutOfMemory(); | |
| 609 return 0; | |
| 610 } | |
| 611 SDL_memset(this->hidden->pcm_buf, this->spec.silence, | |
| 612 this->hidden->pcm_len); | |
|
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613 |
| 3139 | 614 /* get the file descriptor */ |
| 615 if (!this->hidden->iscapture) { | |
| 616 this->hidden->audio_fd = | |
| 617 snd_pcm_file_descriptor(this->hidden->audio_handle, | |
| 618 SND_PCM_CHANNEL_PLAYBACK); | |
| 619 } else { | |
| 620 this->hidden->audio_fd = | |
| 621 snd_pcm_file_descriptor(this->hidden->audio_handle, | |
| 622 SND_PCM_CHANNEL_CAPTURE); | |
| 623 } | |
|
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624 |
| 3139 | 625 if (this->hidden->audio_fd < 0) { |
| 626 QSA_CloseDevice(this); | |
| 627 QSA_SetError("snd_pcm_file_descriptor", status); | |
| 628 return 0; | |
| 629 } | |
|
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630 |
| 3139 | 631 /* Prepare an audio channel */ |
| 632 if (!this->hidden->iscapture) { | |
| 633 /* Prepare audio playback */ | |
| 634 status = | |
| 635 snd_pcm_plugin_prepare(this->hidden->audio_handle, | |
| 636 SND_PCM_CHANNEL_PLAYBACK); | |
| 637 } else { | |
| 638 /* Prepare audio capture */ | |
| 639 status = | |
| 640 snd_pcm_plugin_prepare(this->hidden->audio_handle, | |
| 641 SND_PCM_CHANNEL_CAPTURE); | |
| 642 } | |
|
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643 |
| 3139 | 644 if (status < 0) { |
| 645 QSA_CloseDevice(this); | |
| 646 QSA_SetError("snd_pcm_plugin_prepare", status); | |
| 647 return 0; | |
| 648 } | |
|
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649 |
| 3139 | 650 /* We're really ready to rock and roll. :-) */ |
| 651 return 1; | |
|
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652 } |
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653 |
| 3139 | 654 int |
| 655 QSA_DetectDevices(int iscapture) | |
|
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656 { |
| 3139 | 657 uint32_t it; |
| 658 uint32_t cards; | |
| 659 uint32_t devices; | |
| 660 int32_t status; | |
| 661 | |
| 662 /* Detect amount of available devices */ | |
| 663 /* this value can be changed in the runtime */ | |
| 664 cards = snd_cards(); | |
|
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665 |
| 3139 | 666 /* If io-audio manager is not running we will get 0 as number */ |
| 667 /* of available audio devices */ | |
| 668 if (cards == 0) { | |
| 669 /* We have no any available audio devices */ | |
| 670 return 0; | |
| 671 } | |
|
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|
672 |
| 3139 | 673 /* Find requested devices by type */ |
| 674 if (!iscapture) { | |
| 675 /* Playback devices enumeration requested */ | |
| 676 for (it = 0; it < cards; it++) { | |
| 677 devices = 0; | |
| 678 do { | |
| 679 status = | |
| 680 snd_card_get_longname(it, | |
| 681 qsa_playback_device | |
| 682 [qsa_playback_devices].name, | |
| 683 QSA_MAX_NAME_LENGTH); | |
| 684 if (status == EOK) { | |
| 685 snd_pcm_t *handle; | |
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686 |
| 3139 | 687 /* Add device number to device name */ |
| 688 sprintf(qsa_playback_device[qsa_playback_devices].name + | |
| 689 SDL_strlen(qsa_playback_device | |
| 690 [qsa_playback_devices].name), " d%d", | |
| 691 devices); | |
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692 |
| 3139 | 693 /* Store associated card number id */ |
| 694 qsa_playback_device[qsa_playback_devices].cardno = it; | |
|
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695 |
| 3139 | 696 /* Check if this device id could play anything */ |
| 697 status = | |
| 698 snd_pcm_open(&handle, it, devices, | |
| 699 SND_PCM_OPEN_PLAYBACK); | |
| 700 if (status == EOK) { | |
| 701 qsa_playback_device[qsa_playback_devices].deviceno = | |
| 702 devices; | |
| 703 status = snd_pcm_close(handle); | |
| 704 if (status == EOK) { | |
| 705 qsa_playback_devices++; | |
| 706 } | |
| 707 } else { | |
| 708 /* Check if we got end of devices list */ | |
| 709 if (status == -ENOENT) { | |
| 710 break; | |
| 711 } | |
| 712 } | |
| 713 } else { | |
| 714 break; | |
| 715 } | |
| 716 | |
| 717 /* Check if we reached maximum devices count */ | |
| 718 if (qsa_playback_devices >= QSA_MAX_DEVICES) { | |
| 719 break; | |
| 720 } | |
| 721 devices++; | |
| 722 } while (1); | |
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723 |
|
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724 /* Check if we reached maximum devices count */ |
| 3139 | 725 if (qsa_playback_devices >= QSA_MAX_DEVICES) { |
| 726 break; | |
|
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727 } |
| 3139 | 728 } |
| 729 } else { | |
| 730 /* Capture devices enumeration requested */ | |
| 731 for (it = 0; it < cards; it++) { | |
| 732 devices = 0; | |
| 733 do { | |
| 734 status = | |
| 735 snd_card_get_longname(it, | |
| 736 qsa_capture_device | |
| 737 [qsa_capture_devices].name, | |
| 738 QSA_MAX_NAME_LENGTH); | |
| 739 if (status == EOK) { | |
| 740 snd_pcm_t *handle; | |
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|
741 |
| 3139 | 742 /* Add device number to device name */ |
| 743 sprintf(qsa_capture_device[qsa_capture_devices].name + | |
| 744 SDL_strlen(qsa_capture_device | |
| 745 [qsa_capture_devices].name), " d%d", | |
| 746 devices); | |
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|
747 |
| 3139 | 748 /* Store associated card number id */ |
| 749 qsa_capture_device[qsa_capture_devices].cardno = it; | |
|
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|
750 |
| 3139 | 751 /* Check if this device id could play anything */ |
| 752 status = | |
| 753 snd_pcm_open(&handle, it, devices, | |
| 754 SND_PCM_OPEN_CAPTURE); | |
| 755 if (status == EOK) { | |
| 756 qsa_capture_device[qsa_capture_devices].deviceno = | |
| 757 devices; | |
| 758 status = snd_pcm_close(handle); | |
| 759 if (status == EOK) { | |
| 760 qsa_capture_devices++; | |
| 761 } | |
| 762 } else { | |
| 763 /* Check if we got end of devices list */ | |
| 764 if (status == -ENOENT) { | |
| 765 break; | |
| 766 } | |
| 767 } | |
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|
768 |
| 3139 | 769 /* Check if we reached maximum devices count */ |
| 770 if (qsa_capture_devices >= QSA_MAX_DEVICES) { | |
| 771 break; | |
| 772 } | |
| 773 } else { | |
| 774 break; | |
| 775 } | |
| 776 devices++; | |
| 777 } while (1); | |
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|
778 |
| 3139 | 779 /* Check if we reached maximum devices count */ |
| 780 if (qsa_capture_devices >= QSA_MAX_DEVICES) { | |
| 781 break; | |
| 782 } | |
| 783 } | |
| 784 } | |
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|
785 |
| 3139 | 786 /* Return amount of available playback or capture devices */ |
| 787 if (!iscapture) { | |
| 788 return qsa_playback_devices; | |
| 789 } else { | |
| 790 return qsa_capture_devices; | |
| 791 } | |
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792 } |
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793 |
| 3139 | 794 const char * |
| 795 QSA_GetDeviceName(int index, int iscapture) | |
|
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|
796 { |
| 3139 | 797 if (!iscapture) { |
| 798 if (index >= qsa_playback_devices) { | |
| 799 return "No such playback device"; | |
| 800 } | |
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801 |
| 3139 | 802 return qsa_playback_device[index].name; |
| 803 } else { | |
| 804 if (index >= qsa_capture_devices) { | |
| 805 return "No such capture device"; | |
| 806 } | |
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|
807 |
| 3139 | 808 return qsa_capture_device[index].name; |
| 809 } | |
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810 } |
|
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|
811 |
| 3139 | 812 void |
| 813 QSA_WaitDone(_THIS) | |
|
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|
814 { |
| 3139 | 815 if (!this->hidden->iscapture) { |
| 816 if (this->hidden->audio_handle != NULL) { | |
| 817 /* Wait till last fragment is played and stop channel */ | |
| 818 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 819 SND_PCM_CHANNEL_PLAYBACK); | |
| 820 } | |
| 821 } else { | |
| 822 if (this->hidden->audio_handle != NULL) { | |
| 823 /* Discard all unread data and stop channel */ | |
| 824 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 825 SND_PCM_CHANNEL_CAPTURE); | |
| 826 } | |
| 827 } | |
| 828 } | |
| 829 | |
| 830 void | |
| 831 QSA_Deinitialize(void) | |
| 832 { | |
| 833 /* Clear devices array on shutdown */ | |
| 834 SDL_memset(qsa_playback_device, 0x00, | |
| 835 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 836 SDL_memset(qsa_capture_device, 0x00, | |
| 837 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 838 qsa_playback_devices = 0; | |
| 839 qsa_capture_devices = 0; | |
|
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|
840 } |
|
82e60908fab1
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|
841 |
| 3139 | 842 static int |
| 843 QSA_Init(SDL_AudioDriverImpl * impl) | |
|
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|
844 { |
| 3139 | 845 snd_pcm_t *handle = NULL; |
| 846 int32_t status = 0; | |
| 847 | |
| 848 /* Clear devices array */ | |
| 849 SDL_memset(qsa_playback_device, 0x00, | |
| 850 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 851 SDL_memset(qsa_capture_device, 0x00, | |
| 852 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 853 qsa_playback_devices = 0; | |
| 854 qsa_capture_devices = 0; | |
| 855 | |
| 856 /* Set function pointers */ | |
| 857 /* DeviceLock and DeviceUnlock functions are used default, */ | |
| 858 /* provided by SDL, which uses pthread_mutex for lock/unlock */ | |
| 859 impl->DetectDevices = QSA_DetectDevices; | |
| 860 impl->GetDeviceName = QSA_GetDeviceName; | |
| 861 impl->OpenDevice = QSA_OpenDevice; | |
| 862 impl->ThreadInit = QSA_ThreadInit; | |
| 863 impl->WaitDevice = QSA_WaitDevice; | |
| 864 impl->PlayDevice = QSA_PlayDevice; | |
| 865 impl->GetDeviceBuf = QSA_GetDeviceBuf; | |
| 866 impl->CloseDevice = QSA_CloseDevice; | |
| 867 impl->WaitDone = QSA_WaitDone; | |
| 868 impl->Deinitialize = QSA_Deinitialize; | |
| 869 impl->LockDevice = NULL; | |
| 870 impl->UnlockDevice = NULL; | |
| 871 | |
| 872 impl->OnlyHasDefaultOutputDevice = 0; | |
| 873 impl->ProvidesOwnCallbackThread = 0; | |
| 874 impl->SkipMixerLock = 0; | |
| 875 impl->HasCaptureSupport = 1; | |
| 876 impl->OnlyHasDefaultOutputDevice = 0; | |
| 877 impl->OnlyHasDefaultInputDevice = 0; | |
| 878 | |
| 879 /* Check if io-audio manager is running or not */ | |
| 880 status = snd_cards(); | |
| 881 if (status == 0) { | |
| 882 /* if no, return immediately */ | |
| 883 return 1; | |
| 884 } | |
| 885 | |
| 886 /* At this point we are definitely has an audio device */ | |
| 887 return 2; | |
|
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|
888 } |
|
82e60908fab1
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|
889 |
| 3139 | 890 AudioBootStrap QSAAUDIO_bootstrap = { |
| 891 DRIVER_NAME, "QNX QSA Audio", QSA_Init, 0 | |
|
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|
892 }; |
|
82e60908fab1
Date: Mon, 23 Mar 2009 09:17:24 +0200
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|
893 |
|
82e60908fab1
Date: Mon, 23 Mar 2009 09:17:24 +0200
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|
894 /* vi: set ts=4 sw=4 expandtab: */ |