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 "qemu/osdep.h"
  21 #include "hw/hw.h"
  22 #include "qemu/host-utils.h"
  23 #include "qemu/module.h"
  24 #include "qemu/error-report.h"
  25 #include "qemu/timer.h"
  26 #include "ui/qemu-spice.h"
  27
  28 #define AUDIO_CAP "spice"
  29 #include "audio.h"
  30 #include "audio_int.h"
  31
  32 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  33 #define LINE_OUT_SAMPLES (480 * 4)
  34 #else
  35 #define LINE_OUT_SAMPLES (256 * 4)
  36 #endif
  37
  38 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
  39 #define LINE_IN_SAMPLES (480 * 4)
  40 #else
  41 #define LINE_IN_SAMPLES (256 * 4)
  42 #endif
  43
  44 typedef struct SpiceRateCtl {
  45     int64_t               start_ticks;
  46     int64_t               bytes_sent;
  47 } SpiceRateCtl;
  48
  49 typedef struct SpiceVoiceOut {
  50     HWVoiceOut            hw;
  51     SpicePlaybackInstance sin;
  52     SpiceRateCtl          rate;
  53     int                   active;
  54     uint32_t              *frame;
  55     uint32_t              *fpos;
  56     uint32_t              fsize;
  57 } SpiceVoiceOut;
  58
  59 typedef struct SpiceVoiceIn {
  60     HWVoiceIn             hw;
  61     SpiceRecordInstance   sin;
  62     SpiceRateCtl          rate;
  63     int                   active;
  64     uint32_t              samples[LINE_IN_SAMPLES];
  65 } SpiceVoiceIn;
  66
  67 static const SpicePlaybackInterface playback_sif = {
  68     .base.type          = SPICE_INTERFACE_PLAYBACK,
  69     .base.description   = "playback",
  70     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  71     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  72 };
  73
  74 static const SpiceRecordInterface record_sif = {
  75     .base.type          = SPICE_INTERFACE_RECORD,
  76     .base.description   = "record",
  77     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  78     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  79 };
  80
  81 static void *spice_audio_init(Audiodev *dev)
  82 {
  83     if (!using_spice) {
  84         return NULL;
  85     }
  86     return &spice_audio_init;
  87 }
  88
  89 static void spice_audio_fini (void *opaque)
  90 {
  91     /* nothing */
  92 }
  93
  94 static void rate_start (SpiceRateCtl *rate)
  95 {
  96     memset (rate, 0, sizeof (*rate));
  97     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  98 }
  99
 100 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
 101 {
 102     int64_t now;
 103     int64_t ticks;
 104     int64_t bytes;
 105     int64_t samples;
 106
 107     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 108     ticks = now - rate->start_ticks;
 109     bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
 110     samples = (bytes - rate->bytes_sent) >> info->shift;
 111     if (samples < 0 || samples > 65536) {
 112         error_report("Resetting rate control (%" PRId64 " samples)", samples);
 113         rate_start(rate);
 114         samples = 0;
 115     }
 116     rate->bytes_sent += samples << info->shift;
 117     return samples;
 118 }
 119
 120 /* playback */
 121
 122 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
 123                          void *drv_opaque)
 124 {
 125     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 126     struct audsettings settings;
 127
 128 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 129     settings.freq       = spice_server_get_best_playback_rate(NULL);
 130 #else
 131     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 132 #endif
 133     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 134     settings.fmt        = AUDIO_FORMAT_S16;
 135     settings.endianness = AUDIO_HOST_ENDIANNESS;
 136
 137     audio_pcm_init_info (&hw->info, &settings);
 138     hw->samples = LINE_OUT_SAMPLES;
 139     out->active = 0;
 140
 141     out->sin.base.sif = &playback_sif.base;
 142     qemu_spice_add_interface (&out->sin.base);
 143 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 144     spice_server_set_playback_rate(&out->sin, settings.freq);
 145 #endif
 146     return 0;
 147 }
 148
 149 static void line_out_fini (HWVoiceOut *hw)
 150 {
 151     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 152
 153     spice_server_remove_interface (&out->sin.base);
 154 }
 155
 156 static int line_out_run (HWVoiceOut *hw, int live)
 157 {
 158     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 159     int rpos, decr;
 160     int samples;
 161
 162     if (!live) {
 163         return 0;
 164     }
 165
 166     decr = rate_get_samples (&hw->info, &out->rate);
 167     decr = audio_MIN (live, decr);
 168
 169     samples = decr;
 170     rpos = hw->rpos;
 171     while (samples) {
 172         int left_till_end_samples = hw->samples - rpos;
 173         int len = audio_MIN (samples, left_till_end_samples);
 174
 175         if (!out->frame) {
 176             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
 177             out->fpos = out->frame;
 178         }
 179         if (out->frame) {
 180             len = audio_MIN (len, out->fsize);
 181             hw->clip (out->fpos, hw->mix_buf + rpos, len);
 182             out->fsize -= len;
 183             out->fpos  += len;
 184             if (out->fsize == 0) {
 185                 spice_server_playback_put_samples (&out->sin, out->frame);
 186                 out->frame = out->fpos = NULL;
 187             }
 188         }
 189         rpos = (rpos + len) % hw->samples;
 190         samples -= len;
 191     }
 192     hw->rpos = rpos;
 193     return decr;
 194 }
 195
 196 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
 197 {
 198     return audio_pcm_sw_write (sw, buf, len);
 199 }
 200
 201 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 202 {
 203     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 204
 205     switch (cmd) {
 206     case VOICE_ENABLE:
 207         if (out->active) {
 208             break;
 209         }
 210         out->active = 1;
 211         rate_start (&out->rate);
 212         spice_server_playback_start (&out->sin);
 213         break;
 214     case VOICE_DISABLE:
 215         if (!out->active) {
 216             break;
 217         }
 218         out->active = 0;
 219         if (out->frame) {
 220             memset (out->fpos, 0, out->fsize << 2);
 221             spice_server_playback_put_samples (&out->sin, out->frame);
 222             out->frame = out->fpos = NULL;
 223         }
 224         spice_server_playback_stop (&out->sin);
 225         break;
 226     case VOICE_VOLUME:
 227         {
 228 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 229             SWVoiceOut *sw;
 230             va_list ap;
 231             uint16_t vol[2];
 232
 233             va_start (ap, cmd);
 234             sw = va_arg (ap, SWVoiceOut *);
 235             va_end (ap);
 236
 237             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 238             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 239             spice_server_playback_set_volume (&out->sin, 2, vol);
 240             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 241 #endif
 242             break;
 243         }
 244     }
 245
 246     return 0;
 247 }
 248
 249 /* record */
 250
 251 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 252 {
 253     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 254     struct audsettings settings;
 255
 256 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 257     settings.freq       = spice_server_get_best_record_rate(NULL);
 258 #else
 259     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 260 #endif
 261     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 262     settings.fmt        = AUDIO_FORMAT_S16;
 263     settings.endianness = AUDIO_HOST_ENDIANNESS;
 264
 265     audio_pcm_init_info (&hw->info, &settings);
 266     hw->samples = LINE_IN_SAMPLES;
 267     in->active = 0;
 268
 269     in->sin.base.sif = &record_sif.base;
 270     qemu_spice_add_interface (&in->sin.base);
 271 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 272     spice_server_set_record_rate(&in->sin, settings.freq);
 273 #endif
 274     return 0;
 275 }
 276
 277 static void line_in_fini (HWVoiceIn *hw)
 278 {
 279     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 280
 281     spice_server_remove_interface (&in->sin.base);
 282 }
 283
 284 static int line_in_run (HWVoiceIn *hw)
 285 {
 286     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 287     int num_samples;
 288     int ready;
 289     int len[2];
 290     uint64_t delta_samp;
 291     const uint32_t *samples;
 292
 293     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
 294         return 0;
 295     }
 296
 297     delta_samp = rate_get_samples (&hw->info, &in->rate);
 298     num_samples = audio_MIN (num_samples, delta_samp);
 299
 300     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
 301     samples = in->samples;
 302     if (ready == 0) {
 303         static const uint32_t silence[LINE_IN_SAMPLES];
 304         samples = silence;
 305         ready = LINE_IN_SAMPLES;
 306     }
 307
 308     num_samples = audio_MIN (ready, num_samples);
 309
 310     if (hw->wpos + num_samples > hw->samples) {
 311         len[0] = hw->samples - hw->wpos;
 312         len[1] = num_samples - len[0];
 313     } else {
 314         len[0] = num_samples;
 315         len[1] = 0;
 316     }
 317
 318     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
 319
 320     if (len[1]) {
 321         hw->conv (hw->conv_buf, samples + len[0], len[1]);
 322     }
 323
 324     hw->wpos = (hw->wpos + num_samples) % hw->samples;
 325
 326     return num_samples;
 327 }
 328
 329 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
 330 {
 331     return audio_pcm_sw_read (sw, buf, size);
 332 }
 333
 334 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 335 {
 336     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 337
 338     switch (cmd) {
 339     case VOICE_ENABLE:
 340         if (in->active) {
 341             break;
 342         }
 343         in->active = 1;
 344         rate_start (&in->rate);
 345         spice_server_record_start (&in->sin);
 346         break;
 347     case VOICE_DISABLE:
 348         if (!in->active) {
 349             break;
 350         }
 351         in->active = 0;
 352         spice_server_record_stop (&in->sin);
 353         break;
 354     case VOICE_VOLUME:
 355         {
 356 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 357             SWVoiceIn *sw;
 358             va_list ap;
 359             uint16_t vol[2];
 360
 361             va_start (ap, cmd);
 362             sw = va_arg (ap, SWVoiceIn *);
 363             va_end (ap);
 364
 365             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 366             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 367             spice_server_record_set_volume (&in->sin, 2, vol);
 368             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 369 #endif
 370             break;
 371         }
 372     }
 373
 374     return 0;
 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 static struct audio_driver spice_audio_driver = {
 392     .name           = "spice",
 393     .descr          = "spice audio driver",
 394     .init           = spice_audio_init,
 395     .fini           = spice_audio_fini,
 396     .pcm_ops        = &audio_callbacks,
 397     .max_voices_out = 1,
 398     .max_voices_in  = 1,
 399     .voice_size_out = sizeof (SpiceVoiceOut),
 400     .voice_size_in  = sizeof (SpiceVoiceIn),
 401 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 402     .ctl_caps       = VOICE_VOLUME_CAP
 403 #endif
 404 };
 405
 406 void qemu_spice_audio_init (void)
 407 {
 408     spice_audio_driver.can_be_default = 1;
 409 }
 410
 411 static void register_audio_spice(void)
 412 {
 413     audio_driver_register(&spice_audio_driver);
 414 }
 415 type_init(register_audio_spice);