audio/spiceaudio.c

   1 /*
   2  * Copyright (C) 2010 Red Hat, Inc.
   3  *
   4  * maintained by Gerd Hoffmann <kraxel@redhat.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 or
   9  * (at your option) version 3 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "hw/hw.h"
  21 #include "qemu/timer.h"
  22 #include "ui/qemu-spice.h"
  23
  24 #define AUDIO_CAP "spice"
  25 #include "audio.h"
  26 #include "audio_int.h"
  27
  28 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  29 #define LINE_OUT_SAMPLES (480 * 4)
  30 #else
  31 #define LINE_OUT_SAMPLES (256 * 4)
  32 #endif
  33
  34 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
  35 #define LINE_IN_SAMPLES (480 * 4)
  36 #else
  37 #define LINE_IN_SAMPLES (256 * 4)
  38 #endif
  39
  40 typedef struct SpiceRateCtl {
  41     int64_t               start_ticks;
  42     int64_t               bytes_sent;
  43 } SpiceRateCtl;
  44
  45 typedef struct SpiceVoiceOut {
  46     HWVoiceOut            hw;
  47     SpicePlaybackInstance sin;
  48     SpiceRateCtl          rate;
  49     int                   active;
  50     uint32_t              *frame;
  51     uint32_t              *fpos;
  52     uint32_t              fsize;
  53 } SpiceVoiceOut;
  54
  55 typedef struct SpiceVoiceIn {
  56     HWVoiceIn             hw;
  57     SpiceRecordInstance   sin;
  58     SpiceRateCtl          rate;
  59     int                   active;
  60     uint32_t              samples[LINE_IN_SAMPLES];
  61 } SpiceVoiceIn;
  62
  63 static const SpicePlaybackInterface playback_sif = {
  64     .base.type          = SPICE_INTERFACE_PLAYBACK,
  65     .base.description   = "playback",
  66     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  67     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  68 };
  69
  70 static const SpiceRecordInterface record_sif = {
  71     .base.type          = SPICE_INTERFACE_RECORD,
  72     .base.description   = "record",
  73     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  74     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  75 };
  76
  77 static void *spice_audio_init (void)
  78 {
  79     if (!using_spice) {
  80         return NULL;
  81     }
  82     return &spice_audio_init;
  83 }
  84
  85 static void spice_audio_fini (void *opaque)
  86 {
  87     /* nothing */
  88 }
  89
  90 static void rate_start (SpiceRateCtl *rate)
  91 {
  92     memset (rate, 0, sizeof (*rate));
  93     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  94 }
  95
  96 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
  97 {
  98     int64_t now;
  99     int64_t ticks;
 100     int64_t bytes;
 101     int64_t samples;
 102
 103     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 104     ticks = now - rate->start_ticks;
 105     bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
 106     samples = (bytes - rate->bytes_sent) >> info->shift;
 107     if (samples < 0 || samples > 65536) {
 108         error_report("Resetting rate control (%" PRId64 " samples)", samples);
 109         rate_start (rate);
 110         samples = 0;
 111     }
 112     rate->bytes_sent += samples << info->shift;
 113     return samples;
 114 }
 115
 116 /* playback */
 117
 118 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
 119                          void *drv_opaque)
 120 {
 121     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 122     struct audsettings settings;
 123
 124 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 125     settings.freq       = spice_server_get_best_playback_rate(NULL);
 126 #else
 127     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 128 #endif
 129     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 130     settings.fmt        = AUD_FMT_S16;
 131     settings.endianness = AUDIO_HOST_ENDIANNESS;
 132
 133     audio_pcm_init_info (&hw->info, &settings);
 134     hw->samples = LINE_OUT_SAMPLES;
 135     out->active = 0;
 136
 137     out->sin.base.sif = &playback_sif.base;
 138     qemu_spice_add_interface (&out->sin.base);
 139 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 140     spice_server_set_playback_rate(&out->sin, settings.freq);
 141 #endif
 142     return 0;
 143 }
 144
 145 static void line_out_fini (HWVoiceOut *hw)
 146 {
 147     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 148
 149     spice_server_remove_interface (&out->sin.base);
 150 }
 151
 152 static int line_out_run (HWVoiceOut *hw, int live)
 153 {
 154     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 155     int rpos, decr;
 156     int samples;
 157
 158     if (!live) {
 159         return 0;
 160     }
 161
 162     decr = rate_get_samples (&hw->info, &out->rate);
 163     decr = audio_MIN (live, decr);
 164
 165     samples = decr;
 166     rpos = hw->rpos;
 167     while (samples) {
 168         int left_till_end_samples = hw->samples - rpos;
 169         int len = audio_MIN (samples, left_till_end_samples);
 170
 171         if (!out->frame) {
 172             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
 173             out->fpos = out->frame;
 174         }
 175         if (out->frame) {
 176             len = audio_MIN (len, out->fsize);
 177             hw->clip (out->fpos, hw->mix_buf + rpos, len);
 178             out->fsize -= len;
 179             out->fpos  += len;
 180             if (out->fsize == 0) {
 181                 spice_server_playback_put_samples (&out->sin, out->frame);
 182                 out->frame = out->fpos = NULL;
 183             }
 184         }
 185         rpos = (rpos + len) % hw->samples;
 186         samples -= len;
 187     }
 188     hw->rpos = rpos;
 189     return decr;
 190 }
 191
 192 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
 193 {
 194     return audio_pcm_sw_write (sw, buf, len);
 195 }
 196
 197 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 198 {
 199     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 200
 201     switch (cmd) {
 202     case VOICE_ENABLE:
 203         if (out->active) {
 204             break;
 205         }
 206         out->active = 1;
 207         rate_start (&out->rate);
 208         spice_server_playback_start (&out->sin);
 209         break;
 210     case VOICE_DISABLE:
 211         if (!out->active) {
 212             break;
 213         }
 214         out->active = 0;
 215         if (out->frame) {
 216             memset (out->fpos, 0, out->fsize << 2);
 217             spice_server_playback_put_samples (&out->sin, out->frame);
 218             out->frame = out->fpos = NULL;
 219         }
 220         spice_server_playback_stop (&out->sin);
 221         break;
 222     case VOICE_VOLUME:
 223         {
 224 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 225             SWVoiceOut *sw;
 226             va_list ap;
 227             uint16_t vol[2];
 228
 229             va_start (ap, cmd);
 230             sw = va_arg (ap, SWVoiceOut *);
 231             va_end (ap);
 232
 233             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 234             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 235             spice_server_playback_set_volume (&out->sin, 2, vol);
 236             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 237 #endif
 238             break;
 239         }
 240     }
 241
 242     return 0;
 243 }
 244
 245 /* record */
 246
 247 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 248 {
 249     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 250     struct audsettings settings;
 251
 252 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 253     settings.freq       = spice_server_get_best_record_rate(NULL);
 254 #else
 255     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 256 #endif
 257     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 258     settings.fmt        = AUD_FMT_S16;
 259     settings.endianness = AUDIO_HOST_ENDIANNESS;
 260
 261     audio_pcm_init_info (&hw->info, &settings);
 262     hw->samples = LINE_IN_SAMPLES;
 263     in->active = 0;
 264
 265     in->sin.base.sif = &record_sif.base;
 266     qemu_spice_add_interface (&in->sin.base);
 267 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 268     spice_server_set_record_rate(&in->sin, settings.freq);
 269 #endif
 270     return 0;
 271 }
 272
 273 static void line_in_fini (HWVoiceIn *hw)
 274 {
 275     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 276
 277     spice_server_remove_interface (&in->sin.base);
 278 }
 279
 280 static int line_in_run (HWVoiceIn *hw)
 281 {
 282     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 283     int num_samples;
 284     int ready;
 285     int len[2];
 286     uint64_t delta_samp;
 287     const uint32_t *samples;
 288
 289     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
 290         return 0;
 291     }
 292
 293     delta_samp = rate_get_samples (&hw->info, &in->rate);
 294     num_samples = audio_MIN (num_samples, delta_samp);
 295
 296     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
 297     samples = in->samples;
 298     if (ready == 0) {
 299         static const uint32_t silence[LINE_IN_SAMPLES];
 300         samples = silence;
 301         ready = LINE_IN_SAMPLES;
 302     }
 303
 304     num_samples = audio_MIN (ready, num_samples);
 305
 306     if (hw->wpos + num_samples > hw->samples) {
 307         len[0] = hw->samples - hw->wpos;
 308         len[1] = num_samples - len[0];
 309     } else {
 310         len[0] = num_samples;
 311         len[1] = 0;
 312     }
 313
 314     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
 315
 316     if (len[1]) {
 317         hw->conv (hw->conv_buf, samples + len[0], len[1]);
 318     }
 319
 320     hw->wpos = (hw->wpos + num_samples) % hw->samples;
 321
 322     return num_samples;
 323 }
 324
 325 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
 326 {
 327     return audio_pcm_sw_read (sw, buf, size);
 328 }
 329
 330 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 331 {
 332     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 333
 334     switch (cmd) {
 335     case VOICE_ENABLE:
 336         if (in->active) {
 337             break;
 338         }
 339         in->active = 1;
 340         rate_start (&in->rate);
 341         spice_server_record_start (&in->sin);
 342         break;
 343     case VOICE_DISABLE:
 344         if (!in->active) {
 345             break;
 346         }
 347         in->active = 0;
 348         spice_server_record_stop (&in->sin);
 349         break;
 350     case VOICE_VOLUME:
 351         {
 352 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 353             SWVoiceIn *sw;
 354             va_list ap;
 355             uint16_t vol[2];
 356
 357             va_start (ap, cmd);
 358             sw = va_arg (ap, SWVoiceIn *);
 359             va_end (ap);
 360
 361             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 362             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 363             spice_server_record_set_volume (&in->sin, 2, vol);
 364             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 365 #endif
 366             break;
 367         }
 368     }
 369
 370     return 0;
 371 }
 372
 373 static struct audio_option audio_options[] = {
 374     { /* end of list */ },
 375 };
 376
 377 static struct audio_pcm_ops audio_callbacks = {
 378     .init_out = line_out_init,
 379     .fini_out = line_out_fini,
 380     .run_out  = line_out_run,
 381     .write    = line_out_write,
 382     .ctl_out  = line_out_ctl,
 383
 384     .init_in  = line_in_init,
 385     .fini_in  = line_in_fini,
 386     .run_in   = line_in_run,
 387     .read     = line_in_read,
 388     .ctl_in   = line_in_ctl,
 389 };
 390
 391 struct audio_driver spice_audio_driver = {
 392     .name           = "spice",
 393     .descr          = "spice audio driver",
 394     .options        = audio_options,
 395     .init           = spice_audio_init,
 396     .fini           = spice_audio_fini,
 397     .pcm_ops        = &audio_callbacks,
 398     .max_voices_out = 1,
 399     .max_voices_in  = 1,
 400     .voice_size_out = sizeof (SpiceVoiceOut),
 401     .voice_size_in  = sizeof (SpiceVoiceIn),
 402 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 403     .ctl_caps       = VOICE_VOLUME_CAP
 404 #endif
 405 };
 406
 407 void qemu_spice_audio_init (void)
 408 {
 409     spice_audio_driver.can_be_default = 1;
 410 }