Mercurial > sdl-ios-xcode
annotate src/audio/qsa/SDL_qsa_audio.c @ 3483:a54df8e52333
Made the comment actually mean something. :)
| author | Sam Lantinga <slouken@libsdl.org> |
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| date | Sun, 22 Nov 2009 20:00:00 +0000 |
| parents | 7f684f249ec9 |
| children | f7b03b6838cb |
| rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2009 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 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 |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 QNX Sound Architecture (QSA) SDL driver |
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23 Copyright (C) 2009 Mike Gorchak |
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24 (mike@malva.ua, lestat@i.com.ua) |
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25 */ |
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26 |
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27 #include "SDL_config.h" |
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28 |
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29 #include <errno.h> |
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30 #include <unistd.h> |
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31 #include <fcntl.h> |
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32 #include <signal.h> |
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33 #include <sys/types.h> |
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34 #include <sys/time.h> |
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35 #include <sched.h> |
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36 #include <sys/select.h> |
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37 #include <sys/neutrino.h> |
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38 #include <sys/asoundlib.h> |
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39 |
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40 #include "SDL_timer.h" |
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41 #include "SDL_audio.h" |
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42 #include "../SDL_audiomem.h" |
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43 #include "../SDL_audio_c.h" |
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44 #include "SDL_qsa_audio.h" |
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45 |
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46 /* The tag name used by QSA audio framework */ |
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47 #define DRIVER_NAME "qsa" |
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48 |
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49 /* default channel communication parameters */ |
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50 #define DEFAULT_CPARAMS_RATE 44100 |
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51 #define DEFAULT_CPARAMS_VOICES 1 |
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52 |
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53 #define DEFAULT_CPARAMS_FRAG_SIZE 4096 |
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54 #define DEFAULT_CPARAMS_FRAGS_MIN 1 |
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55 #define DEFAULT_CPARAMS_FRAGS_MAX 1 |
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56 |
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57 #define QSA_NO_WORKAROUNDS 0x00000000 |
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58 #define QSA_MMAP_WORKAROUND 0x00000001 |
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59 |
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60 struct BuggyCards |
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61 { |
| 3139 | 62 char *cardname; |
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63 unsigned long bugtype; |
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64 }; |
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65 |
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66 #define QSA_WA_CARDS 3 |
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67 #define QSA_MAX_CARD_NAME_LENGTH 33 |
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68 |
| 3139 | 69 struct BuggyCards buggycards[QSA_WA_CARDS] = { |
| 70 {"Sound Blaster Live!", QSA_MMAP_WORKAROUND}, | |
| 71 {"Vortex 8820", QSA_MMAP_WORKAROUND}, | |
| 72 {"Vortex 8830", QSA_MMAP_WORKAROUND}, | |
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73 }; |
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74 |
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75 /* List of found devices */ |
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76 #define QSA_MAX_DEVICES 32 |
| 3139 | 77 #define QSA_MAX_NAME_LENGTH 81+16 /* Hardcoded in QSA, can't be changed */ |
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78 |
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79 typedef struct _QSA_Device |
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80 { |
| 3139 | 81 char name[QSA_MAX_NAME_LENGTH]; /* Long audio device name for SDL */ |
| 82 int cardno; | |
| 83 int deviceno; | |
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84 } QSA_Device; |
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85 |
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86 QSA_Device qsa_playback_device[QSA_MAX_DEVICES]; |
| 3139 | 87 uint32_t qsa_playback_devices; |
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88 |
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89 QSA_Device qsa_capture_device[QSA_MAX_DEVICES]; |
| 3139 | 90 uint32_t qsa_capture_devices; |
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91 |
| 3139 | 92 static inline void |
| 93 QSA_SetError(const char *fn, int status) | |
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94 { |
| 3139 | 95 SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status)); |
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96 } |
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97 |
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98 /* card names check to apply the workarounds */ |
| 3139 | 99 static int |
| 100 QSA_CheckBuggyCards(_THIS, unsigned long checkfor) | |
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101 { |
| 3139 | 102 char scardname[QSA_MAX_CARD_NAME_LENGTH]; |
| 103 int it; | |
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104 |
| 3139 | 105 if (snd_card_get_name |
| 106 (this->hidden->cardno, scardname, QSA_MAX_CARD_NAME_LENGTH - 1) < 0) { | |
| 107 return 0; | |
| 108 } | |
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109 |
| 3139 | 110 for (it = 0; it < QSA_WA_CARDS; it++) { |
| 111 if (SDL_strcmp(buggycards[it].cardname, scardname) == 0) { | |
| 112 if (buggycards[it].bugtype == checkfor) { | |
| 113 return 1; | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 return 0; | |
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119 } |
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120 |
| 3139 | 121 static void |
| 122 QSA_ThreadInit(_THIS) | |
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123 { |
| 3139 | 124 struct sched_param param; |
| 125 int status; | |
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126 |
| 3139 | 127 /* Increase default 10 priority to 25 to avoid jerky sound */ |
| 128 status = SchedGet(0, 0, ¶m); | |
| 129 param.sched_priority = param.sched_curpriority + 15; | |
| 130 status = SchedSet(0, 0, SCHED_NOCHANGE, ¶m); | |
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131 } |
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132 |
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133 /* PCM channel parameters initialize function */ |
| 3139 | 134 static void |
| 135 QSA_InitAudioParams(snd_pcm_channel_params_t * cpars) | |
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136 { |
| 3139 | 137 SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t)); |
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138 |
| 3139 | 139 cpars->channel = SND_PCM_CHANNEL_PLAYBACK; |
| 140 cpars->mode = SND_PCM_MODE_BLOCK; | |
| 141 cpars->start_mode = SND_PCM_START_DATA; | |
| 142 cpars->stop_mode = SND_PCM_STOP_STOP; | |
| 143 cpars->format.format = SND_PCM_SFMT_S16_LE; | |
| 144 cpars->format.interleave = 1; | |
| 145 cpars->format.rate = DEFAULT_CPARAMS_RATE; | |
| 146 cpars->format.voices = DEFAULT_CPARAMS_VOICES; | |
| 147 cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE; | |
| 148 cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN; | |
| 149 cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX; | |
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150 } |
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151 |
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152 /* This function waits until it is possible to write a full sound buffer */ |
| 3139 | 153 static void |
| 154 QSA_WaitDevice(_THIS) | |
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155 { |
| 3139 | 156 fd_set wfds; |
| 157 fd_set rfds; | |
| 158 int selectret; | |
| 159 struct timeval timeout; | |
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160 |
| 3139 | 161 if (!this->hidden->iscapture) { |
| 162 FD_ZERO(&wfds); | |
| 163 FD_SET(this->hidden->audio_fd, &wfds); | |
| 164 } else { | |
| 165 FD_ZERO(&rfds); | |
| 166 FD_SET(this->hidden->audio_fd, &rfds); | |
| 167 } | |
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168 |
| 3139 | 169 do { |
| 170 /* Setup timeout for playing one fragment equal to 2 seconds */ | |
| 171 /* If timeout occured than something wrong with hardware or driver */ | |
| 172 /* For example, Vortex 8820 audio driver stucks on second DAC because */ | |
| 173 /* it doesn't exist ! */ | |
| 174 timeout.tv_sec = 2; | |
| 175 timeout.tv_usec = 0; | |
| 176 this->hidden->timeout_on_wait = 0; | |
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177 |
| 3139 | 178 if (!this->hidden->iscapture) { |
| 179 selectret = | |
| 180 select(this->hidden->audio_fd + 1, NULL, &wfds, NULL, | |
| 181 &timeout); | |
| 182 } else { | |
| 183 selectret = | |
| 184 select(this->hidden->audio_fd + 1, &rfds, NULL, NULL, | |
| 185 &timeout); | |
| 186 } | |
| 187 | |
| 188 switch (selectret) { | |
| 189 case -1: | |
| 190 { | |
| 191 SDL_SetError("QSA: select() failed: %s\n", strerror(errno)); | |
| 192 return; | |
| 193 } | |
| 194 break; | |
| 195 case 0: | |
| 196 { | |
| 197 SDL_SetError("QSA: timeout on buffer waiting occured\n"); | |
| 198 this->hidden->timeout_on_wait = 1; | |
| 199 return; | |
| 200 } | |
| 201 break; | |
| 202 default: | |
| 203 { | |
| 204 if (!this->hidden->iscapture) { | |
| 205 if (FD_ISSET(this->hidden->audio_fd, &wfds)) { | |
| 206 return; | |
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207 } |
| 3139 | 208 } else { |
| 209 if (FD_ISSET(this->hidden->audio_fd, &rfds)) { | |
| 210 return; | |
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211 } |
| 3139 | 212 } |
| 213 } | |
| 214 break; | |
| 215 } | |
| 216 } while (1); | |
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217 } |
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218 |
| 3139 | 219 static void |
| 220 QSA_PlayDevice(_THIS) | |
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221 { |
| 3139 | 222 snd_pcm_channel_status_t cstatus; |
| 223 int written; | |
| 224 int status; | |
| 225 int towrite; | |
| 226 void *pcmbuffer; | |
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227 |
| 3139 | 228 if ((!this->enabled) || (!this->hidden)) { |
| 229 return; | |
| 230 } | |
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231 |
| 3139 | 232 towrite = this->spec.size; |
| 233 pcmbuffer = this->hidden->pcm_buf; | |
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234 |
| 3139 | 235 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */ |
| 236 do { | |
| 237 written = | |
| 238 snd_pcm_plugin_write(this->hidden->audio_handle, pcmbuffer, | |
| 239 towrite); | |
| 240 if (written != towrite) { | |
| 241 /* Check if samples playback got stuck somewhere in hardware or in */ | |
| 242 /* the audio device driver */ | |
| 243 if ((errno == EAGAIN) && (written == 0)) { | |
| 244 if (this->hidden->timeout_on_wait != 0) { | |
| 245 SDL_SetError("QSA: buffer playback timeout\n"); | |
| 246 return; | |
| 247 } | |
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248 } |
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249 |
| 3139 | 250 /* Check for errors or conditions */ |
| 251 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) { | |
| 252 /* Let a little CPU time go by and try to write again */ | |
| 253 SDL_Delay(1); | |
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254 |
| 3139 | 255 /* if we wrote some data */ |
| 256 towrite -= written; | |
| 257 pcmbuffer += written * this->spec.channels; | |
| 258 continue; | |
| 259 } else { | |
| 260 if ((errno == EINVAL) || (errno == EIO)) { | |
| 261 SDL_memset(&cstatus, 0, sizeof(cstatus)); | |
| 262 if (!this->hidden->iscapture) { | |
| 263 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK; | |
| 264 } else { | |
| 265 cstatus.channel = SND_PCM_CHANNEL_CAPTURE; | |
| 266 } | |
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267 |
| 3139 | 268 status = |
| 269 snd_pcm_plugin_status(this->hidden->audio_handle, | |
| 270 &cstatus); | |
| 271 if (status < 0) { | |
| 272 QSA_SetError("snd_pcm_plugin_status", status); | |
| 273 return; | |
| 274 } | |
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275 |
| 3139 | 276 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || |
| 277 (cstatus.status == SND_PCM_STATUS_READY)) { | |
| 278 if (!this->hidden->iscapture) { | |
| 279 status = | |
| 280 snd_pcm_plugin_prepare(this->hidden-> | |
| 281 audio_handle, | |
| 282 SND_PCM_CHANNEL_PLAYBACK); | |
| 283 } else { | |
| 284 status = | |
| 285 snd_pcm_plugin_prepare(this->hidden-> | |
| 286 audio_handle, | |
| 287 SND_PCM_CHANNEL_CAPTURE); | |
| 288 } | |
| 289 if (status < 0) { | |
| 290 QSA_SetError("snd_pcm_plugin_prepare", status); | |
| 291 return; | |
| 292 } | |
| 293 } | |
| 294 continue; | |
| 295 } else { | |
| 296 return; | |
| 297 } | |
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298 } |
| 3139 | 299 } else { |
| 300 /* we wrote all remaining data */ | |
| 301 towrite -= written; | |
| 302 pcmbuffer += written * this->spec.channels; | |
| 303 } | |
| 304 } while ((towrite > 0) && (this->enabled)); | |
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305 |
| 3139 | 306 /* If we couldn't write, assume fatal error for now */ |
| 307 if (towrite != 0) { | |
| 308 this->enabled = 0; | |
| 309 } | |
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310 } |
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311 |
| 3139 | 312 static Uint8 * |
| 313 QSA_GetDeviceBuf(_THIS) | |
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314 { |
| 3139 | 315 return this->hidden->pcm_buf; |
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316 } |
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317 |
| 3139 | 318 static void |
| 319 QSA_CloseDevice(_THIS) | |
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320 { |
| 3139 | 321 if (this->hidden != NULL) { |
| 322 if (this->hidden->audio_handle != NULL) { | |
| 323 if (!this->hidden->iscapture) { | |
| 324 /* Finish playing available samples */ | |
| 325 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 326 SND_PCM_CHANNEL_PLAYBACK); | |
| 327 } else { | |
| 328 /* Cancel unread samples during capture */ | |
| 329 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 330 SND_PCM_CHANNEL_CAPTURE); | |
| 331 } | |
| 332 snd_pcm_close(this->hidden->audio_handle); | |
| 333 this->hidden->audio_handle = NULL; | |
| 334 } | |
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335 |
| 3139 | 336 if (this->hidden->pcm_buf != NULL) { |
| 337 SDL_FreeAudioMem(this->hidden->pcm_buf); | |
| 338 this->hidden->pcm_buf = NULL; | |
| 339 } | |
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340 |
| 3139 | 341 SDL_free(this->hidden); |
| 342 this->hidden = NULL; | |
| 343 } | |
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344 } |
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345 |
| 3139 | 346 static int |
| 347 QSA_OpenDevice(_THIS, const char *devname, int iscapture) | |
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348 { |
| 3139 | 349 int status = 0; |
| 350 int format = 0; | |
| 351 SDL_AudioFormat test_format = 0; | |
| 352 int found = 0; | |
| 353 snd_pcm_channel_setup_t csetup; | |
| 354 snd_pcm_channel_params_t cparams; | |
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355 |
| 3139 | 356 /* Initialize all variables that we clean on shutdown */ |
| 357 this->hidden = | |
| 358 (struct SDL_PrivateAudioData *) SDL_calloc(1, | |
| 359 (sizeof | |
| 360 (struct | |
| 361 SDL_PrivateAudioData))); | |
| 362 if (this->hidden == NULL) { | |
| 363 SDL_OutOfMemory(); | |
| 364 return 0; | |
| 365 } | |
| 366 SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData)); | |
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367 |
| 3139 | 368 /* Initialize channel transfer parameters to default */ |
| 369 QSA_InitAudioParams(&cparams); | |
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370 |
| 3139 | 371 /* Initialize channel direction: capture or playback */ |
| 372 this->hidden->iscapture = iscapture; | |
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373 |
| 3139 | 374 /* Find deviceid and cardid by device name for playback */ |
| 375 if ((!this->hidden->iscapture) && (devname != NULL)) { | |
| 376 uint32_t device; | |
| 377 int32_t status; | |
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378 |
| 3139 | 379 /* Search in the playback devices */ |
| 380 device = 0; | |
| 381 do { | |
| 382 status = SDL_strcmp(qsa_playback_device[device].name, devname); | |
| 383 if (status == 0) { | |
| 384 /* Found requested device */ | |
| 385 this->hidden->deviceno = qsa_playback_device[device].deviceno; | |
| 386 this->hidden->cardno = qsa_playback_device[device].cardno; | |
| 387 break; | |
| 388 } | |
| 389 device++; | |
| 390 if (device >= qsa_playback_devices) { | |
| 391 QSA_CloseDevice(this); | |
| 392 SDL_SetError("No such playback device"); | |
| 393 return 0; | |
| 394 } | |
| 395 } while (1); | |
| 396 } | |
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397 |
| 3139 | 398 /* Find deviceid and cardid by device name for capture */ |
| 399 if ((this->hidden->iscapture) && (devname != NULL)) { | |
| 400 /* Search in the capture devices */ | |
| 401 uint32_t device; | |
| 402 int32_t status; | |
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403 |
| 3139 | 404 /* Searching in the playback devices */ |
| 405 device = 0; | |
| 406 do { | |
| 407 status = SDL_strcmp(qsa_capture_device[device].name, devname); | |
| 408 if (status == 0) { | |
| 409 /* Found requested device */ | |
| 410 this->hidden->deviceno = qsa_capture_device[device].deviceno; | |
| 411 this->hidden->cardno = qsa_capture_device[device].cardno; | |
| 412 break; | |
| 413 } | |
| 414 device++; | |
| 415 if (device >= qsa_capture_devices) { | |
| 416 QSA_CloseDevice(this); | |
| 417 SDL_SetError("No such capture device"); | |
| 418 return 0; | |
| 419 } | |
| 420 } while (1); | |
| 421 } | |
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422 |
| 3139 | 423 /* Check if SDL requested default audio device */ |
| 424 if (devname == NULL) { | |
| 425 /* Open system default audio device */ | |
| 426 if (!this->hidden->iscapture) { | |
| 427 status = snd_pcm_open_preferred(&this->hidden->audio_handle, | |
| 428 &this->hidden->cardno, | |
| 429 &this->hidden->deviceno, | |
| 430 SND_PCM_OPEN_PLAYBACK); | |
| 431 } else { | |
| 432 status = snd_pcm_open_preferred(&this->hidden->audio_handle, | |
| 433 &this->hidden->cardno, | |
| 434 &this->hidden->deviceno, | |
| 435 SND_PCM_OPEN_CAPTURE); | |
| 436 } | |
| 437 } else { | |
| 438 /* Open requested audio device */ | |
| 439 if (!this->hidden->iscapture) { | |
| 440 status = | |
| 441 snd_pcm_open(&this->hidden->audio_handle, | |
| 442 this->hidden->cardno, this->hidden->deviceno, | |
| 443 SND_PCM_OPEN_PLAYBACK); | |
| 444 } else { | |
| 445 status = | |
| 446 snd_pcm_open(&this->hidden->audio_handle, | |
| 447 this->hidden->cardno, this->hidden->deviceno, | |
| 448 SND_PCM_OPEN_CAPTURE); | |
| 449 } | |
| 450 } | |
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451 |
| 3139 | 452 /* Check if requested device is opened */ |
| 453 if (status < 0) { | |
| 454 this->hidden->audio_handle = NULL; | |
| 455 QSA_CloseDevice(this); | |
| 456 QSA_SetError("snd_pcm_open", status); | |
| 457 return 0; | |
| 458 } | |
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459 |
| 3139 | 460 if (!QSA_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) { |
| 461 /* Disable QSA MMAP plugin for buggy audio drivers */ | |
| 462 status = | |
| 463 snd_pcm_plugin_set_disable(this->hidden->audio_handle, | |
| 464 PLUGIN_DISABLE_MMAP); | |
| 465 if (status < 0) { | |
| 466 QSA_CloseDevice(this); | |
| 467 QSA_SetError("snd_pcm_plugin_set_disable", status); | |
| 468 return 0; | |
| 469 } | |
| 470 } | |
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471 |
| 3139 | 472 /* Try for a closest match on audio format */ |
| 473 format = 0; | |
| 474 /* can't use format as SND_PCM_SFMT_U8 = 0 in qsa */ | |
| 475 found = 0; | |
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476 |
| 3139 | 477 for (test_format = SDL_FirstAudioFormat(this->spec.format); !found;) { |
| 478 /* if match found set format to equivalent QSA format */ | |
| 479 switch (test_format) { | |
| 480 case AUDIO_U8: | |
| 481 { | |
| 482 format = SND_PCM_SFMT_U8; | |
| 483 found = 1; | |
| 484 } | |
| 485 break; | |
| 486 case AUDIO_S8: | |
| 487 { | |
| 488 format = SND_PCM_SFMT_S8; | |
| 489 found = 1; | |
| 490 } | |
| 491 break; | |
| 492 case AUDIO_S16LSB: | |
| 493 { | |
| 494 format = SND_PCM_SFMT_S16_LE; | |
| 495 found = 1; | |
| 496 } | |
| 497 break; | |
| 498 case AUDIO_S16MSB: | |
| 499 { | |
| 500 format = SND_PCM_SFMT_S16_BE; | |
| 501 found = 1; | |
| 502 } | |
| 503 break; | |
| 504 case AUDIO_U16LSB: | |
| 505 { | |
| 506 format = SND_PCM_SFMT_U16_LE; | |
| 507 found = 1; | |
| 508 } | |
| 509 break; | |
| 510 case AUDIO_U16MSB: | |
| 511 { | |
| 512 format = SND_PCM_SFMT_U16_BE; | |
| 513 found = 1; | |
| 514 } | |
| 515 break; | |
| 516 case AUDIO_S32LSB: | |
| 517 { | |
| 518 format = SND_PCM_SFMT_S32_LE; | |
| 519 found = 1; | |
| 520 } | |
| 521 break; | |
| 522 case AUDIO_S32MSB: | |
| 523 { | |
| 524 format = SND_PCM_SFMT_S32_BE; | |
| 525 found = 1; | |
| 526 } | |
| 527 break; | |
| 528 case AUDIO_F32LSB: | |
| 529 { | |
| 530 format = SND_PCM_SFMT_FLOAT_LE; | |
| 531 found = 1; | |
| 532 } | |
| 533 break; | |
| 534 case AUDIO_F32MSB: | |
| 535 { | |
| 536 format = SND_PCM_SFMT_FLOAT_BE; | |
| 537 found = 1; | |
| 538 } | |
| 539 break; | |
| 540 default: | |
| 541 { | |
| 542 break; | |
| 543 } | |
| 544 } | |
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545 |
| 3139 | 546 if (!found) { |
| 547 test_format = SDL_NextAudioFormat(); | |
| 548 } | |
| 549 } | |
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550 |
| 3139 | 551 /* assumes test_format not 0 on success */ |
| 552 if (test_format == 0) { | |
| 553 QSA_CloseDevice(this); | |
| 554 SDL_SetError("QSA: Couldn't find any hardware audio formats"); | |
| 555 return 0; | |
| 556 } | |
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557 |
| 3139 | 558 this->spec.format = test_format; |
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559 |
| 3139 | 560 /* Set the audio format */ |
| 561 cparams.format.format = format; | |
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562 |
| 3139 | 563 /* Set mono/stereo/4ch/6ch/8ch audio */ |
| 564 cparams.format.voices = this->spec.channels; | |
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565 |
| 3139 | 566 /* Set rate */ |
| 567 cparams.format.rate = this->spec.freq; | |
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568 |
| 3139 | 569 /* Setup the transfer parameters according to cparams */ |
| 570 status = snd_pcm_plugin_params(this->hidden->audio_handle, &cparams); | |
| 571 if (status < 0) { | |
| 572 QSA_CloseDevice(this); | |
| 573 QSA_SetError("snd_pcm_channel_params", status); | |
| 574 return 0; | |
| 575 } | |
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576 |
| 3139 | 577 /* Make sure channel is setup right one last time */ |
| 578 SDL_memset(&csetup, '\0', sizeof(csetup)); | |
| 579 if (!this->hidden->iscapture) { | |
| 580 csetup.channel = SND_PCM_CHANNEL_PLAYBACK; | |
| 581 } else { | |
| 582 csetup.channel = SND_PCM_CHANNEL_CAPTURE; | |
| 583 } | |
|
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|
584 |
| 3139 | 585 /* Setup an audio channel */ |
| 586 if (snd_pcm_plugin_setup(this->hidden->audio_handle, &csetup) < 0) { | |
| 587 QSA_CloseDevice(this); | |
| 588 SDL_SetError("QSA: Unable to setup channel\n"); | |
| 589 return 0; | |
| 590 } | |
|
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591 |
| 3139 | 592 /* Calculate the final parameters for this audio specification */ |
| 593 SDL_CalculateAudioSpec(&this->spec); | |
|
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594 |
| 3139 | 595 this->hidden->pcm_len = this->spec.size; |
|
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596 |
| 3139 | 597 if (this->hidden->pcm_len == 0) { |
| 598 this->hidden->pcm_len = | |
| 599 csetup.buf.block.frag_size * this->spec.channels * | |
| 600 (snd_pcm_format_width(format) / 8); | |
| 601 } | |
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602 |
| 3139 | 603 /* |
| 604 * Allocate memory to the audio buffer and initialize with silence | |
| 605 * (Note that buffer size must be a multiple of fragment size, so find | |
| 606 * closest multiple) | |
| 607 */ | |
| 608 this->hidden->pcm_buf = | |
| 609 (Uint8 *) SDL_AllocAudioMem(this->hidden->pcm_len); | |
| 610 if (this->hidden->pcm_buf == NULL) { | |
| 611 QSA_CloseDevice(this); | |
| 612 SDL_OutOfMemory(); | |
| 613 return 0; | |
| 614 } | |
| 615 SDL_memset(this->hidden->pcm_buf, this->spec.silence, | |
| 616 this->hidden->pcm_len); | |
|
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|
617 |
| 3139 | 618 /* get the file descriptor */ |
| 619 if (!this->hidden->iscapture) { | |
| 620 this->hidden->audio_fd = | |
| 621 snd_pcm_file_descriptor(this->hidden->audio_handle, | |
| 622 SND_PCM_CHANNEL_PLAYBACK); | |
| 623 } else { | |
| 624 this->hidden->audio_fd = | |
| 625 snd_pcm_file_descriptor(this->hidden->audio_handle, | |
| 626 SND_PCM_CHANNEL_CAPTURE); | |
| 627 } | |
|
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|
628 |
| 3139 | 629 if (this->hidden->audio_fd < 0) { |
| 630 QSA_CloseDevice(this); | |
| 631 QSA_SetError("snd_pcm_file_descriptor", status); | |
| 632 return 0; | |
| 633 } | |
|
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|
634 |
| 3139 | 635 /* Prepare an audio channel */ |
| 636 if (!this->hidden->iscapture) { | |
| 637 /* Prepare audio playback */ | |
| 638 status = | |
| 639 snd_pcm_plugin_prepare(this->hidden->audio_handle, | |
| 640 SND_PCM_CHANNEL_PLAYBACK); | |
| 641 } else { | |
| 642 /* Prepare audio capture */ | |
| 643 status = | |
| 644 snd_pcm_plugin_prepare(this->hidden->audio_handle, | |
| 645 SND_PCM_CHANNEL_CAPTURE); | |
| 646 } | |
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|
647 |
| 3139 | 648 if (status < 0) { |
| 649 QSA_CloseDevice(this); | |
| 650 QSA_SetError("snd_pcm_plugin_prepare", status); | |
| 651 return 0; | |
| 652 } | |
|
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653 |
| 3139 | 654 /* We're really ready to rock and roll. :-) */ |
| 655 return 1; | |
|
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|
656 } |
|
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|
657 |
| 3139 | 658 int |
| 659 QSA_DetectDevices(int iscapture) | |
|
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|
660 { |
| 3139 | 661 uint32_t it; |
| 662 uint32_t cards; | |
| 663 uint32_t devices; | |
| 664 int32_t status; | |
| 665 | |
| 666 /* Detect amount of available devices */ | |
| 667 /* this value can be changed in the runtime */ | |
| 668 cards = snd_cards(); | |
|
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669 |
| 3139 | 670 /* If io-audio manager is not running we will get 0 as number */ |
| 671 /* of available audio devices */ | |
| 672 if (cards == 0) { | |
| 673 /* We have no any available audio devices */ | |
| 674 return 0; | |
| 675 } | |
|
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|
676 |
| 3139 | 677 /* Find requested devices by type */ |
| 678 if (!iscapture) { | |
| 679 /* Playback devices enumeration requested */ | |
| 680 for (it = 0; it < cards; it++) { | |
| 681 devices = 0; | |
| 682 do { | |
| 683 status = | |
| 684 snd_card_get_longname(it, | |
| 685 qsa_playback_device | |
| 686 [qsa_playback_devices].name, | |
| 687 QSA_MAX_NAME_LENGTH); | |
| 688 if (status == EOK) { | |
| 689 snd_pcm_t *handle; | |
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|
690 |
| 3139 | 691 /* Add device number to device name */ |
| 692 sprintf(qsa_playback_device[qsa_playback_devices].name + | |
| 693 SDL_strlen(qsa_playback_device | |
| 694 [qsa_playback_devices].name), " d%d", | |
| 695 devices); | |
|
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|
696 |
| 3139 | 697 /* Store associated card number id */ |
| 698 qsa_playback_device[qsa_playback_devices].cardno = it; | |
|
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|
699 |
| 3139 | 700 /* Check if this device id could play anything */ |
| 701 status = | |
| 702 snd_pcm_open(&handle, it, devices, | |
| 703 SND_PCM_OPEN_PLAYBACK); | |
| 704 if (status == EOK) { | |
| 705 qsa_playback_device[qsa_playback_devices].deviceno = | |
| 706 devices; | |
| 707 status = snd_pcm_close(handle); | |
| 708 if (status == EOK) { | |
| 709 qsa_playback_devices++; | |
| 710 } | |
| 711 } else { | |
| 712 /* Check if we got end of devices list */ | |
| 713 if (status == -ENOENT) { | |
| 714 break; | |
| 715 } | |
| 716 } | |
| 717 } else { | |
| 718 break; | |
| 719 } | |
| 720 | |
| 721 /* Check if we reached maximum devices count */ | |
| 722 if (qsa_playback_devices >= QSA_MAX_DEVICES) { | |
| 723 break; | |
| 724 } | |
| 725 devices++; | |
| 726 } while (1); | |
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|
727 |
|
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Date: Mon, 23 Mar 2009 09:17:24 +0200
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|
728 /* Check if we reached maximum devices count */ |
| 3139 | 729 if (qsa_playback_devices >= QSA_MAX_DEVICES) { |
| 730 break; | |
|
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|
731 } |
| 3139 | 732 } |
| 733 } else { | |
| 734 /* Capture devices enumeration requested */ | |
| 735 for (it = 0; it < cards; it++) { | |
| 736 devices = 0; | |
| 737 do { | |
| 738 status = | |
| 739 snd_card_get_longname(it, | |
| 740 qsa_capture_device | |
| 741 [qsa_capture_devices].name, | |
| 742 QSA_MAX_NAME_LENGTH); | |
| 743 if (status == EOK) { | |
| 744 snd_pcm_t *handle; | |
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|
745 |
| 3139 | 746 /* Add device number to device name */ |
| 747 sprintf(qsa_capture_device[qsa_capture_devices].name + | |
| 748 SDL_strlen(qsa_capture_device | |
| 749 [qsa_capture_devices].name), " d%d", | |
| 750 devices); | |
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|
751 |
| 3139 | 752 /* Store associated card number id */ |
| 753 qsa_capture_device[qsa_capture_devices].cardno = it; | |
|
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|
754 |
| 3139 | 755 /* Check if this device id could play anything */ |
| 756 status = | |
| 757 snd_pcm_open(&handle, it, devices, | |
| 758 SND_PCM_OPEN_CAPTURE); | |
| 759 if (status == EOK) { | |
| 760 qsa_capture_device[qsa_capture_devices].deviceno = | |
| 761 devices; | |
| 762 status = snd_pcm_close(handle); | |
| 763 if (status == EOK) { | |
| 764 qsa_capture_devices++; | |
| 765 } | |
| 766 } else { | |
| 767 /* Check if we got end of devices list */ | |
| 768 if (status == -ENOENT) { | |
| 769 break; | |
| 770 } | |
| 771 } | |
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|
772 |
| 3139 | 773 /* Check if we reached maximum devices count */ |
| 774 if (qsa_capture_devices >= QSA_MAX_DEVICES) { | |
| 775 break; | |
| 776 } | |
| 777 } else { | |
| 778 break; | |
| 779 } | |
| 780 devices++; | |
| 781 } while (1); | |
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|
782 |
| 3139 | 783 /* Check if we reached maximum devices count */ |
| 784 if (qsa_capture_devices >= QSA_MAX_DEVICES) { | |
| 785 break; | |
| 786 } | |
| 787 } | |
| 788 } | |
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|
789 |
| 3139 | 790 /* Return amount of available playback or capture devices */ |
| 791 if (!iscapture) { | |
| 792 return qsa_playback_devices; | |
| 793 } else { | |
| 794 return qsa_capture_devices; | |
| 795 } | |
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|
796 } |
|
82e60908fab1
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|
797 |
| 3139 | 798 const char * |
| 799 QSA_GetDeviceName(int index, int iscapture) | |
|
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|
800 { |
| 3139 | 801 if (!iscapture) { |
| 802 if (index >= qsa_playback_devices) { | |
| 803 return "No such playback device"; | |
| 804 } | |
|
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|
805 |
| 3139 | 806 return qsa_playback_device[index].name; |
| 807 } else { | |
| 808 if (index >= qsa_capture_devices) { | |
| 809 return "No such capture device"; | |
| 810 } | |
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|
811 |
| 3139 | 812 return qsa_capture_device[index].name; |
| 813 } | |
|
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|
814 } |
|
82e60908fab1
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|
815 |
| 3139 | 816 void |
| 817 QSA_WaitDone(_THIS) | |
|
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|
818 { |
| 3139 | 819 if (!this->hidden->iscapture) { |
| 820 if (this->hidden->audio_handle != NULL) { | |
| 821 /* Wait till last fragment is played and stop channel */ | |
| 822 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 823 SND_PCM_CHANNEL_PLAYBACK); | |
| 824 } | |
| 825 } else { | |
| 826 if (this->hidden->audio_handle != NULL) { | |
| 827 /* Discard all unread data and stop channel */ | |
| 828 snd_pcm_plugin_flush(this->hidden->audio_handle, | |
| 829 SND_PCM_CHANNEL_CAPTURE); | |
| 830 } | |
| 831 } | |
| 832 } | |
| 833 | |
| 834 void | |
| 835 QSA_Deinitialize(void) | |
| 836 { | |
| 837 /* Clear devices array on shutdown */ | |
| 838 SDL_memset(qsa_playback_device, 0x00, | |
| 839 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 840 SDL_memset(qsa_capture_device, 0x00, | |
| 841 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 842 qsa_playback_devices = 0; | |
| 843 qsa_capture_devices = 0; | |
|
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|
844 } |
|
82e60908fab1
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|
845 |
| 3139 | 846 static int |
| 847 QSA_Init(SDL_AudioDriverImpl * impl) | |
|
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|
848 { |
| 3139 | 849 snd_pcm_t *handle = NULL; |
| 850 int32_t status = 0; | |
| 851 | |
| 852 /* Clear devices array */ | |
| 853 SDL_memset(qsa_playback_device, 0x00, | |
| 854 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 855 SDL_memset(qsa_capture_device, 0x00, | |
| 856 sizeof(QSA_Device) * QSA_MAX_DEVICES); | |
| 857 qsa_playback_devices = 0; | |
| 858 qsa_capture_devices = 0; | |
| 859 | |
| 860 /* Set function pointers */ | |
| 861 /* DeviceLock and DeviceUnlock functions are used default, */ | |
| 862 /* provided by SDL, which uses pthread_mutex for lock/unlock */ | |
| 863 impl->DetectDevices = QSA_DetectDevices; | |
| 864 impl->GetDeviceName = QSA_GetDeviceName; | |
| 865 impl->OpenDevice = QSA_OpenDevice; | |
| 866 impl->ThreadInit = QSA_ThreadInit; | |
| 867 impl->WaitDevice = QSA_WaitDevice; | |
| 868 impl->PlayDevice = QSA_PlayDevice; | |
| 869 impl->GetDeviceBuf = QSA_GetDeviceBuf; | |
| 870 impl->CloseDevice = QSA_CloseDevice; | |
| 871 impl->WaitDone = QSA_WaitDone; | |
| 872 impl->Deinitialize = QSA_Deinitialize; | |
| 873 impl->LockDevice = NULL; | |
| 874 impl->UnlockDevice = NULL; | |
| 875 | |
| 876 impl->OnlyHasDefaultOutputDevice = 0; | |
| 877 impl->ProvidesOwnCallbackThread = 0; | |
| 878 impl->SkipMixerLock = 0; | |
| 879 impl->HasCaptureSupport = 1; | |
| 880 impl->OnlyHasDefaultOutputDevice = 0; | |
| 881 impl->OnlyHasDefaultInputDevice = 0; | |
| 882 | |
| 883 /* Check if io-audio manager is running or not */ | |
| 884 status = snd_cards(); | |
| 885 if (status == 0) { | |
| 886 /* if no, return immediately */ | |
| 887 return 1; | |
| 888 } | |
| 889 | |
| 890 /* At this point we are definitely has an audio device */ | |
| 891 return 2; | |
|
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|
892 } |
|
82e60908fab1
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|
893 |
| 3139 | 894 AudioBootStrap QSAAUDIO_bootstrap = { |
| 895 DRIVER_NAME, "QNX QSA Audio", QSA_Init, 0 | |
|
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|
896 }; |
|
82e60908fab1
Date: Mon, 23 Mar 2009 09:17:24 +0200
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|
897 |
|
82e60908fab1
Date: Mon, 23 Mar 2009 09:17:24 +0200
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|
898 /* vi: set ts=4 sw=4 expandtab: */ |