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audio_template.h (14434B)

      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)(AudioState *s,
     40                                               struct audio_driver *drv)
     41 {
     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         } else {
     51             dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
     52                    drv->name,
     53                    glue (s->nb_hw_voices_, TYPE),
     54                    max_voices);
     55         }
     56         glue (s->nb_hw_voices_, TYPE) = max_voices;
     57     }
     58 
     59     if (audio_bug(__func__, !voice_size && max_voices)) {
     60         dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
     61                drv->name, max_voices);
     62         glue (s->nb_hw_voices_, TYPE) = 0;
     63     }
     64 
     65     if (audio_bug(__func__, voice_size && !max_voices)) {
     66         dolog ("drv=`%s' voice_size=%d max_voices=0\n",
     67                drv->name, voice_size);
     68     }
     69 }
     70 
     71 static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
     72 {
     73     g_free(hw->buf_emul);
     74     g_free (HWBUF);
     75     HWBUF = NULL;
     76 }
     77 
     78 static void glue(audio_pcm_hw_alloc_resources_, TYPE)(HW *hw)
     79 {
     80     if (glue(audio_get_pdo_, TYPE)(hw->s->dev)->mixing_engine) {
     81         size_t samples = hw->samples;
     82         if (audio_bug(__func__, samples == 0)) {
     83             dolog("Attempted to allocate empty buffer\n");
     84         }
     85 
     86         HWBUF = g_malloc0(sizeof(STSampleBuffer) + sizeof(st_sample) * samples);
     87         HWBUF->size = samples;
     88     } else {
     89         HWBUF = NULL;
     90     }
     91 }
     92 
     93 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
     94 {
     95     g_free (sw->buf);
     96 
     97     if (sw->rate) {
     98         st_rate_stop (sw->rate);
     99     }
    100 
    101     sw->buf = NULL;
    102     sw->rate = NULL;
    103 }
    104 
    105 static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
    106 {
    107     int samples;
    108 
    109     if (!glue(audio_get_pdo_, TYPE)(sw->s->dev)->mixing_engine) {
    110         return 0;
    111     }
    112 
    113 #ifdef DAC
    114     samples = ((int64_t) sw->HWBUF->size << 32) / sw->ratio;
    115 #else
    116     samples = (int64_t)sw->HWBUF->size * sw->ratio >> 32;
    117 #endif
    118 
    119     sw->buf = audio_calloc(__func__, samples, sizeof(struct st_sample));
    120     if (!sw->buf) {
    121         dolog ("Could not allocate buffer for `%s' (%d samples)\n",
    122                SW_NAME (sw), samples);
    123         return -1;
    124     }
    125 
    126 #ifdef DAC
    127     sw->rate = st_rate_start (sw->info.freq, sw->hw->info.freq);
    128 #else
    129     sw->rate = st_rate_start (sw->hw->info.freq, sw->info.freq);
    130 #endif
    131     if (!sw->rate) {
    132         g_free (sw->buf);
    133         sw->buf = NULL;
    134         return -1;
    135     }
    136     return 0;
    137 }
    138 
    139 static int glue (audio_pcm_sw_init_, TYPE) (
    140     SW *sw,
    141     HW *hw,
    142     const char *name,
    143     struct audsettings *as
    144     )
    145 {
    146     int err;
    147 
    148     audio_pcm_init_info (&sw->info, as);
    149     sw->hw = hw;
    150     sw->active = 0;
    151 #ifdef DAC
    152     sw->ratio = ((int64_t) sw->hw->info.freq << 32) / sw->info.freq;
    153     sw->total_hw_samples_mixed = 0;
    154     sw->empty = 1;
    155 #else
    156     sw->ratio = ((int64_t) sw->info.freq << 32) / sw->hw->info.freq;
    157 #endif
    158 
    159     if (sw->info.is_float) {
    160 #ifdef DAC
    161         sw->conv = mixeng_conv_float[sw->info.nchannels == 2];
    162 #else
    163         sw->clip = mixeng_clip_float[sw->info.nchannels == 2];
    164 #endif
    165     } else {
    166 #ifdef DAC
    167         sw->conv = mixeng_conv
    168 #else
    169         sw->clip = mixeng_clip
    170 #endif
    171             [sw->info.nchannels == 2]
    172             [sw->info.is_signed]
    173             [sw->info.swap_endianness]
    174             [audio_bits_to_index(sw->info.bits)];
    175     }
    176 
    177     sw->name = g_strdup (name);
    178     err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
    179     if (err) {
    180         g_free (sw->name);
    181         sw->name = NULL;
    182     }
    183     return err;
    184 }
    185 
    186 static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
    187 {
    188     glue (audio_pcm_sw_free_resources_, TYPE) (sw);
    189     g_free (sw->name);
    190     sw->name = NULL;
    191 }
    192 
    193 static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
    194 {
    195     QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
    196 }
    197 
    198 static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
    199 {
    200     QLIST_REMOVE (sw, entries);
    201 }
    202 
    203 static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
    204 {
    205     HW *hw = *hwp;
    206     AudioState *s = hw->s;
    207 
    208     if (!hw->sw_head.lh_first) {
    209 #ifdef DAC
    210         audio_detach_capture(hw);
    211 #endif
    212         QLIST_REMOVE(hw, entries);
    213         glue(hw->pcm_ops->fini_, TYPE) (hw);
    214         glue(s->nb_hw_voices_, TYPE) += 1;
    215         glue(audio_pcm_hw_free_resources_ , TYPE) (hw);
    216         g_free(hw);
    217         *hwp = NULL;
    218     }
    219 }
    220 
    221 static HW *glue(audio_pcm_hw_find_any_, TYPE)(AudioState *s, HW *hw)
    222 {
    223     return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
    224 }
    225 
    226 static HW *glue(audio_pcm_hw_find_any_enabled_, TYPE)(AudioState *s, HW *hw)
    227 {
    228     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
    229         if (hw->enabled) {
    230             return hw;
    231         }
    232     }
    233     return NULL;
    234 }
    235 
    236 static HW *glue(audio_pcm_hw_find_specific_, TYPE)(AudioState *s, HW *hw,
    237                                                    struct audsettings *as)
    238 {
    239     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
    240         if (audio_pcm_info_eq (&hw->info, as)) {
    241             return hw;
    242         }
    243     }
    244     return NULL;
    245 }
    246 
    247 static HW *glue(audio_pcm_hw_add_new_, TYPE)(AudioState *s,
    248                                              struct audsettings *as)
    249 {
    250     HW *hw;
    251     struct audio_driver *drv = s->drv;
    252 
    253     if (!glue (s->nb_hw_voices_, TYPE)) {
    254         return NULL;
    255     }
    256 
    257     if (audio_bug(__func__, !drv)) {
    258         dolog ("No host audio driver\n");
    259         return NULL;
    260     }
    261 
    262     if (audio_bug(__func__, !drv->pcm_ops)) {
    263         dolog ("Host audio driver without pcm_ops\n");
    264         return NULL;
    265     }
    266 
    267     hw = audio_calloc(__func__, 1, glue(drv->voice_size_, TYPE));
    268     if (!hw) {
    269         dolog ("Can not allocate voice `%s' size %d\n",
    270                drv->name, glue (drv->voice_size_, TYPE));
    271         return NULL;
    272     }
    273 
    274     hw->s = s;
    275     hw->pcm_ops = drv->pcm_ops;
    276 
    277     QLIST_INIT (&hw->sw_head);
    278 #ifdef DAC
    279     QLIST_INIT (&hw->cap_head);
    280 #endif
    281     if (glue (hw->pcm_ops->init_, TYPE) (hw, as, s->drv_opaque)) {
    282         goto err0;
    283     }
    284 
    285     if (audio_bug(__func__, hw->samples <= 0)) {
    286         dolog("hw->samples=%zd\n", hw->samples);
    287         goto err1;
    288     }
    289 
    290     if (hw->info.is_float) {
    291 #ifdef DAC
    292         hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
    293 #else
    294         hw->conv = mixeng_conv_float[hw->info.nchannels == 2];
    295 #endif
    296     } else {
    297 #ifdef DAC
    298         hw->clip = mixeng_clip
    299 #else
    300         hw->conv = mixeng_conv
    301 #endif
    302             [hw->info.nchannels == 2]
    303             [hw->info.is_signed]
    304             [hw->info.swap_endianness]
    305             [audio_bits_to_index(hw->info.bits)];
    306     }
    307 
    308     glue(audio_pcm_hw_alloc_resources_, TYPE)(hw);
    309 
    310     QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
    311     glue (s->nb_hw_voices_, TYPE) -= 1;
    312 #ifdef DAC
    313     audio_attach_capture (hw);
    314 #endif
    315     return hw;
    316 
    317  err1:
    318     glue (hw->pcm_ops->fini_, TYPE) (hw);
    319  err0:
    320     g_free (hw);
    321     return NULL;
    322 }
    323 
    324 AudiodevPerDirectionOptions *glue(audio_get_pdo_, TYPE)(Audiodev *dev)
    325 {
    326     switch (dev->driver) {
    327     case AUDIODEV_DRIVER_NONE:
    328         return dev->u.none.TYPE;
    329     case AUDIODEV_DRIVER_ALSA:
    330         return qapi_AudiodevAlsaPerDirectionOptions_base(dev->u.alsa.TYPE);
    331     case AUDIODEV_DRIVER_COREAUDIO:
    332         return qapi_AudiodevCoreaudioPerDirectionOptions_base(
    333             dev->u.coreaudio.TYPE);
    334     case AUDIODEV_DRIVER_DBUS:
    335         return dev->u.dbus.TYPE;
    336     case AUDIODEV_DRIVER_DSOUND:
    337         return dev->u.dsound.TYPE;
    338     case AUDIODEV_DRIVER_JACK:
    339         return qapi_AudiodevJackPerDirectionOptions_base(dev->u.jack.TYPE);
    340     case AUDIODEV_DRIVER_OSS:
    341         return qapi_AudiodevOssPerDirectionOptions_base(dev->u.oss.TYPE);
    342     case AUDIODEV_DRIVER_PA:
    343         return qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.TYPE);
    344     case AUDIODEV_DRIVER_SDL:
    345         return qapi_AudiodevSdlPerDirectionOptions_base(dev->u.sdl.TYPE);
    346     case AUDIODEV_DRIVER_SNDIO:
    347         return dev->u.sndio.TYPE;
    348     case AUDIODEV_DRIVER_SPICE:
    349         return dev->u.spice.TYPE;
    350     case AUDIODEV_DRIVER_WAV:
    351         return dev->u.wav.TYPE;
    352 
    353     case AUDIODEV_DRIVER__MAX:
    354         break;
    355     }
    356     abort();
    357 }
    358 
    359 static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as)
    360 {
    361     HW *hw;
    362     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
    363 
    364     if (!pdo->mixing_engine || pdo->fixed_settings) {
    365         hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
    366         if (!pdo->mixing_engine || hw) {
    367             return hw;
    368         }
    369     }
    370 
    371     hw = glue(audio_pcm_hw_find_specific_, TYPE)(s, NULL, as);
    372     if (hw) {
    373         return hw;
    374     }
    375 
    376     hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
    377     if (hw) {
    378         return hw;
    379     }
    380 
    381     return glue(audio_pcm_hw_find_any_, TYPE)(s, NULL);
    382 }
    383 
    384 static SW *glue(audio_pcm_create_voice_pair_, TYPE)(
    385     AudioState *s,
    386     const char *sw_name,
    387     struct audsettings *as
    388     )
    389 {
    390     SW *sw;
    391     HW *hw;
    392     struct audsettings hw_as;
    393     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
    394 
    395     if (pdo->fixed_settings) {
    396         hw_as = audiodev_to_audsettings(pdo);
    397     } else {
    398         hw_as = *as;
    399     }
    400 
    401     sw = audio_calloc(__func__, 1, sizeof(*sw));
    402     if (!sw) {
    403         dolog ("Could not allocate soft voice `%s' (%zu bytes)\n",
    404                sw_name ? sw_name : "unknown", sizeof (*sw));
    405         goto err1;
    406     }
    407     sw->s = s;
    408 
    409     hw = glue(audio_pcm_hw_add_, TYPE)(s, &hw_as);
    410     if (!hw) {
    411         goto err2;
    412     }
    413 
    414     glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
    415 
    416     if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
    417         goto err3;
    418     }
    419 
    420     return sw;
    421 
    422 err3:
    423     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
    424     glue (audio_pcm_hw_gc_, TYPE) (&hw);
    425 err2:
    426     g_free (sw);
    427 err1:
    428     return NULL;
    429 }
    430 
    431 static void glue (audio_close_, TYPE) (SW *sw)
    432 {
    433     glue (audio_pcm_sw_fini_, TYPE) (sw);
    434     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
    435     glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
    436     g_free (sw);
    437 }
    438 
    439 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
    440 {
    441     if (sw) {
    442         if (audio_bug(__func__, !card)) {
    443             dolog ("card=%p\n", card);
    444             return;
    445         }
    446 
    447         glue (audio_close_, TYPE) (sw);
    448     }
    449 }
    450 
    451 SW *glue (AUD_open_, TYPE) (
    452     QEMUSoundCard *card,
    453     SW *sw,
    454     const char *name,
    455     void *callback_opaque ,
    456     audio_callback_fn callback_fn,
    457     struct audsettings *as
    458     )
    459 {
    460     AudioState *s;
    461     AudiodevPerDirectionOptions *pdo;
    462 
    463     if (audio_bug(__func__, !card || !name || !callback_fn || !as)) {
    464         dolog ("card=%p name=%p callback_fn=%p as=%p\n",
    465                card, name, callback_fn, as);
    466         goto fail;
    467     }
    468 
    469     s = card->state;
    470     pdo = glue(audio_get_pdo_, TYPE)(s->dev);
    471 
    472     ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
    473             name, as->freq, as->nchannels, as->fmt);
    474 
    475     if (audio_bug(__func__, audio_validate_settings(as))) {
    476         audio_print_settings (as);
    477         goto fail;
    478     }
    479 
    480     if (audio_bug(__func__, !s->drv)) {
    481         dolog ("Can not open `%s' (no host audio driver)\n", name);
    482         goto fail;
    483     }
    484 
    485     if (sw && audio_pcm_info_eq (&sw->info, as)) {
    486         return sw;
    487     }
    488 
    489     if (!pdo->fixed_settings && sw) {
    490         glue (AUD_close_, TYPE) (card, sw);
    491         sw = NULL;
    492     }
    493 
    494     if (sw) {
    495         HW *hw = sw->hw;
    496 
    497         if (!hw) {
    498             dolog ("Internal logic error voice `%s' has no hardware store\n",
    499                    SW_NAME (sw));
    500             goto fail;
    501         }
    502 
    503         glue (audio_pcm_sw_fini_, TYPE) (sw);
    504         if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
    505             goto fail;
    506         }
    507     } else {
    508         sw = glue(audio_pcm_create_voice_pair_, TYPE)(s, name, as);
    509         if (!sw) {
    510             dolog ("Failed to create voice `%s'\n", name);
    511             return NULL;
    512         }
    513     }
    514 
    515     sw->card = card;
    516     sw->vol = nominal_volume;
    517     sw->callback.fn = callback_fn;
    518     sw->callback.opaque = callback_opaque;
    519 
    520 #ifdef DEBUG_AUDIO
    521     dolog ("%s\n", name);
    522     audio_pcm_print_info ("hw", &sw->hw->info);
    523     audio_pcm_print_info ("sw", &sw->info);
    524 #endif
    525 
    526     return sw;
    527 
    528  fail:
    529     glue (AUD_close_, TYPE) (card, sw);
    530     return NULL;
    531 }
    532 
    533 int glue (AUD_is_active_, TYPE) (SW *sw)
    534 {
    535     return sw ? sw->active : 0;
    536 }
    537 
    538 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
    539 {
    540     if (!sw) {
    541         return;
    542     }
    543 
    544     ts->old_ts = sw->hw->ts_helper;
    545 }
    546 
    547 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
    548 {
    549     uint64_t delta, cur_ts, old_ts;
    550 
    551     if (!sw) {
    552         return 0;
    553     }
    554 
    555     cur_ts = sw->hw->ts_helper;
    556     old_ts = ts->old_ts;
    557     /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
    558 
    559     if (cur_ts >= old_ts) {
    560         delta = cur_ts - old_ts;
    561     } else {
    562         delta = UINT64_MAX - old_ts + cur_ts;
    563     }
    564 
    565     if (!delta) {
    566         return 0;
    567     }
    568 
    569     return muldiv64 (delta, sw->hw->info.freq, 1000000);
    570 }
    571 
    572 #undef TYPE
    573 #undef HW
    574 #undef SW
    575 #undef HWBUF
    576 #undef NAME