audio/audio_template.h

   1 /*
   2  * QEMU Audio subsystem header
   3  *
   4  * Copyright (c) 2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifdef DAC
  26 #define NAME "playback"
  27 #define HWBUF hw->mix_buf
  28 #define TYPE out
  29 #define HW HWVoiceOut
  30 #define SW SWVoiceOut
  31 #else
  32 #define NAME "capture"
  33 #define TYPE in
  34 #define HW HWVoiceIn
  35 #define SW SWVoiceIn
  36 #define HWBUF hw->conv_buf
  37 #endif
  38
  39 static void glue (audio_init_nb_voices_, TYPE) (struct audio_driver *drv)
  40 {
  41     AudioState *s = &glob_audio_state;
  42     int max_voices = glue (drv->max_voices_, TYPE);
  43     int voice_size = glue (drv->voice_size_, TYPE);
  44
  45     if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
  46         if (!max_voices) {
  47 #ifdef DAC
  48             dolog ("Driver `%s' does not support " NAME "\n", drv->name);
  49 #endif
  50         }
  51         else {
  52             dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
  53                    drv->name,
  54                    glue (s->nb_hw_voices_, TYPE),
  55                    max_voices);
  56         }
  57         glue (s->nb_hw_voices_, TYPE) = max_voices;
  58     }
  59
  60     if (audio_bug(__func__, !voice_size && max_voices)) {
  61         dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
  62                drv->name, max_voices);
  63         glue (s->nb_hw_voices_, TYPE) = 0;
  64     }
  65
  66     if (audio_bug(__func__, voice_size && !max_voices)) {
  67         dolog ("drv=`%s' voice_size=%d max_voices=0\n",
  68                drv->name, voice_size);
  69     }
  70 }
  71
  72 static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
  73 {
  74     g_free (HWBUF);
  75     HWBUF = NULL;
  76 }
  77
  78 static int glue (audio_pcm_hw_alloc_resources_, TYPE) (HW *hw)
  79 {
  80     HWBUF = audio_calloc(__func__, hw->samples, sizeof(struct st_sample));
  81     if (!HWBUF) {
  82         dolog ("Could not allocate " NAME " buffer (%d samples)\n",
  83                hw->samples);
  84         return -1;
  85     }
  86
  87     return 0;
  88 }
  89
  90 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
  91 {
  92     g_free (sw->buf);
  93
  94     if (sw->rate) {
  95         st_rate_stop (sw->rate);
  96     }
  97
  98     sw->buf = NULL;
  99     sw->rate = NULL;
 100 }
 101
 102 static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
 103 {
 104     int samples;
 105
 106     samples = ((int64_t) sw->hw->samples << 32) / sw->ratio;
 107
 108     sw->buf = audio_calloc(__func__, samples, sizeof(struct st_sample));
 109     if (!sw->buf) {
 110         dolog ("Could not allocate buffer for `%s' (%d samples)\n",
 111                SW_NAME (sw), samples);
 112         return -1;
 113     }
 114
 115 #ifdef DAC
 116     sw->rate = st_rate_start (sw->info.freq, sw->hw->info.freq);
 117 #else
 118     sw->rate = st_rate_start (sw->hw->info.freq, sw->info.freq);
 119 #endif
 120     if (!sw->rate) {
 121         g_free (sw->buf);
 122         sw->buf = NULL;
 123         return -1;
 124     }
 125     return 0;
 126 }
 127
 128 static int glue (audio_pcm_sw_init_, TYPE) (
 129     SW *sw,
 130     HW *hw,
 131     const char *name,
 132     struct audsettings *as
 133     )
 134 {
 135     int err;
 136
 137     audio_pcm_init_info (&sw->info, as);
 138     sw->hw = hw;
 139     sw->active = 0;
 140 #ifdef DAC
 141     sw->ratio = ((int64_t) sw->hw->info.freq << 32) / sw->info.freq;
 142     sw->total_hw_samples_mixed = 0;
 143     sw->empty = 1;
 144 #else
 145     sw->ratio = ((int64_t) sw->info.freq << 32) / sw->hw->info.freq;
 146 #endif
 147
 148 #ifdef DAC
 149     sw->conv = mixeng_conv
 150 #else
 151     sw->clip = mixeng_clip
 152 #endif
 153         [sw->info.nchannels == 2]
 154         [sw->info.sign]
 155         [sw->info.swap_endianness]
 156         [audio_bits_to_index (sw->info.bits)];
 157
 158     sw->name = g_strdup (name);
 159     err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
 160     if (err) {
 161         g_free (sw->name);
 162         sw->name = NULL;
 163     }
 164     return err;
 165 }
 166
 167 static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
 168 {
 169     glue (audio_pcm_sw_free_resources_, TYPE) (sw);
 170     g_free (sw->name);
 171     sw->name = NULL;
 172 }
 173
 174 static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
 175 {
 176     QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
 177 }
 178
 179 static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
 180 {
 181     QLIST_REMOVE (sw, entries);
 182 }
 183
 184 static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
 185 {
 186     AudioState *s = &glob_audio_state;
 187     HW *hw = *hwp;
 188
 189     if (!hw->sw_head.lh_first) {
 190 #ifdef DAC
 191         audio_detach_capture (hw);
 192 #endif
 193         QLIST_REMOVE (hw, entries);
 194         glue (hw->pcm_ops->fini_, TYPE) (hw);
 195         glue (s->nb_hw_voices_, TYPE) += 1;
 196         glue (audio_pcm_hw_free_resources_ ,TYPE) (hw);
 197         g_free (hw);
 198         *hwp = NULL;
 199     }
 200 }
 201
 202 static HW *glue (audio_pcm_hw_find_any_, TYPE) (HW *hw)
 203 {
 204     AudioState *s = &glob_audio_state;
 205     return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
 206 }
 207
 208 static HW *glue (audio_pcm_hw_find_any_enabled_, TYPE) (HW *hw)
 209 {
 210     while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
 211         if (hw->enabled) {
 212             return hw;
 213         }
 214     }
 215     return NULL;
 216 }
 217
 218 static HW *glue (audio_pcm_hw_find_specific_, TYPE) (
 219     HW *hw,
 220     struct audsettings *as
 221     )
 222 {
 223     while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
 224         if (audio_pcm_info_eq (&hw->info, as)) {
 225             return hw;
 226         }
 227     }
 228     return NULL;
 229 }
 230
 231 static HW *glue (audio_pcm_hw_add_new_, TYPE) (struct audsettings *as)
 232 {
 233     HW *hw;
 234     AudioState *s = &glob_audio_state;
 235     struct audio_driver *drv = s->drv;
 236
 237     if (!glue (s->nb_hw_voices_, TYPE)) {
 238         return NULL;
 239     }
 240
 241     if (audio_bug(__func__, !drv)) {
 242         dolog ("No host audio driver\n");
 243         return NULL;
 244     }
 245
 246     if (audio_bug(__func__, !drv->pcm_ops)) {
 247         dolog ("Host audio driver without pcm_ops\n");
 248         return NULL;
 249     }
 250
 251     hw = audio_calloc(__func__, 1, glue(drv->voice_size_, TYPE));
 252     if (!hw) {
 253         dolog ("Can not allocate voice `%s' size %d\n",
 254                drv->name, glue (drv->voice_size_, TYPE));
 255         return NULL;
 256     }
 257
 258     hw->pcm_ops = drv->pcm_ops;
 259     hw->ctl_caps = drv->ctl_caps;
 260
 261     QLIST_INIT (&hw->sw_head);
 262 #ifdef DAC
 263     QLIST_INIT (&hw->cap_head);
 264 #endif
 265     if (glue (hw->pcm_ops->init_, TYPE) (hw, as, s->drv_opaque)) {
 266         goto err0;
 267     }
 268
 269     if (audio_bug(__func__, hw->samples <= 0)) {
 270         dolog ("hw->samples=%d\n", hw->samples);
 271         goto err1;
 272     }
 273
 274 #ifdef DAC
 275     hw->clip = mixeng_clip
 276 #else
 277     hw->conv = mixeng_conv
 278 #endif
 279         [hw->info.nchannels == 2]
 280         [hw->info.sign]
 281         [hw->info.swap_endianness]
 282         [audio_bits_to_index (hw->info.bits)];
 283
 284     if (glue (audio_pcm_hw_alloc_resources_, TYPE) (hw)) {
 285         goto err1;
 286     }
 287
 288     QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
 289     glue (s->nb_hw_voices_, TYPE) -= 1;
 290 #ifdef DAC
 291     audio_attach_capture (hw);
 292 #endif
 293     return hw;
 294
 295  err1:
 296     glue (hw->pcm_ops->fini_, TYPE) (hw);
 297  err0:
 298     g_free (hw);
 299     return NULL;
 300 }
 301
 302 static HW *glue (audio_pcm_hw_add_, TYPE) (struct audsettings *as)
 303 {
 304     HW *hw;
 305
 306     if (glue (conf.fixed_, TYPE).enabled && glue (conf.fixed_, TYPE).greedy) {
 307         hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
 308         if (hw) {
 309             return hw;
 310         }
 311     }
 312
 313     hw = glue (audio_pcm_hw_find_specific_, TYPE) (NULL, as);
 314     if (hw) {
 315         return hw;
 316     }
 317
 318     hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
 319     if (hw) {
 320         return hw;
 321     }
 322
 323     return glue (audio_pcm_hw_find_any_, TYPE) (NULL);
 324 }
 325
 326 static SW *glue (audio_pcm_create_voice_pair_, TYPE) (
 327     const char *sw_name,
 328     struct audsettings *as
 329     )
 330 {
 331     SW *sw;
 332     HW *hw;
 333     struct audsettings hw_as;
 334
 335     if (glue (conf.fixed_, TYPE).enabled) {
 336         hw_as = glue (conf.fixed_, TYPE).settings;
 337     }
 338     else {
 339         hw_as = *as;
 340     }
 341
 342     sw = audio_calloc(__func__, 1, sizeof(*sw));
 343     if (!sw) {
 344         dolog ("Could not allocate soft voice `%s' (%zu bytes)\n",
 345                sw_name ? sw_name : "unknown", sizeof (*sw));
 346         goto err1;
 347     }
 348
 349     hw = glue (audio_pcm_hw_add_, TYPE) (&hw_as);
 350     if (!hw) {
 351         goto err2;
 352     }
 353
 354     glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
 355
 356     if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
 357         goto err3;
 358     }
 359
 360     return sw;
 361
 362 err3:
 363     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 364     glue (audio_pcm_hw_gc_, TYPE) (&hw);
 365 err2:
 366     g_free (sw);
 367 err1:
 368     return NULL;
 369 }
 370
 371 static void glue (audio_close_, TYPE) (SW *sw)
 372 {
 373     glue (audio_pcm_sw_fini_, TYPE) (sw);
 374     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 375     glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
 376     g_free (sw);
 377 }
 378
 379 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
 380 {
 381     if (sw) {
 382         if (audio_bug(__func__, !card)) {
 383             dolog ("card=%p\n", card);
 384             return;
 385         }
 386
 387         glue (audio_close_, TYPE) (sw);
 388     }
 389 }
 390
 391 SW *glue (AUD_open_, TYPE) (
 392     QEMUSoundCard *card,
 393     SW *sw,
 394     const char *name,
 395     void *callback_opaque ,
 396     audio_callback_fn callback_fn,
 397     struct audsettings *as
 398     )
 399 {
 400     AudioState *s = &glob_audio_state;
 401
 402     if (audio_bug(__func__, !card || !name || !callback_fn || !as)) {
 403         dolog ("card=%p name=%p callback_fn=%p as=%p\n",
 404                card, name, callback_fn, as);
 405         goto fail;
 406     }
 407
 408     ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
 409             name, as->freq, as->nchannels, as->fmt);
 410
 411     if (audio_bug(__func__, audio_validate_settings(as))) {
 412         audio_print_settings (as);
 413         goto fail;
 414     }
 415
 416     if (audio_bug(__func__, !s->drv)) {
 417         dolog ("Can not open `%s' (no host audio driver)\n", name);
 418         goto fail;
 419     }
 420
 421     if (sw && audio_pcm_info_eq (&sw->info, as)) {
 422         return sw;
 423     }
 424
 425     if (!glue (conf.fixed_, TYPE).enabled && sw) {
 426         glue (AUD_close_, TYPE) (card, sw);
 427         sw = NULL;
 428     }
 429
 430     if (sw) {
 431         HW *hw = sw->hw;
 432
 433         if (!hw) {
 434             dolog ("Internal logic error voice `%s' has no hardware store\n",
 435                    SW_NAME (sw));
 436             goto fail;
 437         }
 438
 439         glue (audio_pcm_sw_fini_, TYPE) (sw);
 440         if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
 441             goto fail;
 442         }
 443     }
 444     else {
 445         sw = glue (audio_pcm_create_voice_pair_, TYPE) (name, as);
 446         if (!sw) {
 447             dolog ("Failed to create voice `%s'\n", name);
 448             return NULL;
 449         }
 450     }
 451
 452     sw->card = card;
 453     sw->vol = nominal_volume;
 454     sw->callback.fn = callback_fn;
 455     sw->callback.opaque = callback_opaque;
 456
 457 #ifdef DEBUG_AUDIO
 458     dolog ("%s\n", name);
 459     audio_pcm_print_info ("hw", &sw->hw->info);
 460     audio_pcm_print_info ("sw", &sw->info);
 461 #endif
 462
 463     return sw;
 464
 465  fail:
 466     glue (AUD_close_, TYPE) (card, sw);
 467     return NULL;
 468 }
 469
 470 int glue (AUD_is_active_, TYPE) (SW *sw)
 471 {
 472     return sw ? sw->active : 0;
 473 }
 474
 475 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 476 {
 477     if (!sw) {
 478         return;
 479     }
 480
 481     ts->old_ts = sw->hw->ts_helper;
 482 }
 483
 484 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 485 {
 486     uint64_t delta, cur_ts, old_ts;
 487
 488     if (!sw) {
 489         return 0;
 490     }
 491
 492     cur_ts = sw->hw->ts_helper;
 493     old_ts = ts->old_ts;
 494     /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
 495
 496     if (cur_ts >= old_ts) {
 497         delta = cur_ts - old_ts;
 498     }
 499     else {
 500         delta = UINT64_MAX - old_ts + cur_ts;
 501     }
 502
 503     if (!delta) {
 504         return 0;
 505     }
 506
 507     return muldiv64 (delta, sw->hw->info.freq, 1000000);
 508 }
 509
 510 #undef TYPE
 511 #undef HW
 512 #undef SW
 513 #undef HWBUF
 514 #undef NAME