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/error-report.h"
  22 #include "qemu/timer.h"
  23 #include "ui/qemu-spice.h"
  24
  25 #define AUDIO_CAP "spice"
  26 #include "audio.h"
  27 #include "audio_int.h"
  28
  29 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  30 #define LINE_OUT_SAMPLES (480 * 4)
  31 #else
  32 #define LINE_OUT_SAMPLES (256 * 4)
  33 #endif
  34
  35 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
  36 #define LINE_IN_SAMPLES (480 * 4)
  37 #else
  38 #define LINE_IN_SAMPLES (256 * 4)
  39 #endif
  40
  41 typedef struct SpiceRateCtl {
  42     int64_t               start_ticks;
  43     int64_t               bytes_sent;
  44 } SpiceRateCtl;
  45
  46 typedef struct SpiceVoiceOut {
  47     HWVoiceOut            hw;
  48     SpicePlaybackInstance sin;
  49     SpiceRateCtl          rate;
  50     int                   active;
  51     uint32_t              *frame;
  52     uint32_t              *fpos;
  53     uint32_t              fsize;
  54 } SpiceVoiceOut;
  55
  56 typedef struct SpiceVoiceIn {
  57     HWVoiceIn             hw;
  58     SpiceRecordInstance   sin;
  59     SpiceRateCtl          rate;
  60     int                   active;
  61     uint32_t              samples[LINE_IN_SAMPLES];
  62 } SpiceVoiceIn;
  63
  64 static const SpicePlaybackInterface playback_sif = {
  65     .base.type          = SPICE_INTERFACE_PLAYBACK,
  66     .base.description   = "playback",
  67     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  68     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  69 };
  70
  71 static const SpiceRecordInterface record_sif = {
  72     .base.type          = SPICE_INTERFACE_RECORD,
  73     .base.description   = "record",
  74     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  75     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  76 };
  77
  78 static void *spice_audio_init (void)
  79 {
  80     if (!using_spice) {
  81         return NULL;
  82     }
  83     return &spice_audio_init;
  84 }
  85
  86 static void spice_audio_fini (void *opaque)
  87 {
  88     /* nothing */
  89 }
  90
  91 static void rate_start (SpiceRateCtl *rate)
  92 {
  93     memset (rate, 0, sizeof (*rate));
  94     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  95 }
  96
  97 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
  98 {
  99     int64_t now;
 100     int64_t ticks;
 101     int64_t bytes;
 102     int64_t samples;
 103
 104     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 105     ticks = now - rate->start_ticks;
 106     bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
 107     samples = (bytes - rate->bytes_sent) >> info->shift;
 108     if (samples < 0 || samples > 65536) {
 109         error_report("Resetting rate control (%" PRId64 " samples)", samples);
 110         rate_start (rate);
 111         samples = 0;
 112     }
 113     rate->bytes_sent += samples << info->shift;
 114     return samples;
 115 }
 116
 117 /* playback */
 118
 119 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
 120                          void *drv_opaque)
 121 {
 122     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 123     struct audsettings settings;
 124
 125 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 126     settings.freq       = spice_server_get_best_playback_rate(NULL);
 127 #else
 128     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 129 #endif
 130     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 131     settings.fmt        = AUD_FMT_S16;
 132     settings.endianness = AUDIO_HOST_ENDIANNESS;
 133
 134     audio_pcm_init_info (&hw->info, &settings);
 135     hw->samples = LINE_OUT_SAMPLES;
 136     out->active = 0;
 137
 138     out->sin.base.sif = &playback_sif.base;
 139     qemu_spice_add_interface (&out->sin.base);
 140 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 141     spice_server_set_playback_rate(&out->sin, settings.freq);
 142 #endif
 143     return 0;
 144 }
 145
 146 static void line_out_fini (HWVoiceOut *hw)
 147 {
 148     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 149
 150     spice_server_remove_interface (&out->sin.base);
 151 }
 152
 153 static int line_out_run (HWVoiceOut *hw, int live)
 154 {
 155     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 156     int rpos, decr;
 157     int samples;
 158
 159     if (!live) {
 160         return 0;
 161     }
 162
 163     decr = rate_get_samples (&hw->info, &out->rate);
 164     decr = audio_MIN (live, decr);
 165
 166     samples = decr;
 167     rpos = hw->rpos;
 168     while (samples) {
 169         int left_till_end_samples = hw->samples - rpos;
 170         int len = audio_MIN (samples, left_till_end_samples);
 171
 172         if (!out->frame) {
 173             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
 174             out->fpos = out->frame;
 175         }
 176         if (out->frame) {
 177             len = audio_MIN (len, out->fsize);
 178             hw->clip (out->fpos, hw->mix_buf + rpos, len);
 179             out->fsize -= len;
 180             out->fpos  += len;
 181             if (out->fsize == 0) {
 182                 spice_server_playback_put_samples (&out->sin, out->frame);
 183                 out->frame = out->fpos = NULL;
 184             }
 185         }
 186         rpos = (rpos + len) % hw->samples;
 187         samples -= len;
 188     }
 189     hw->rpos = rpos;
 190     return decr;
 191 }
 192
 193 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
 194 {
 195     return audio_pcm_sw_write (sw, buf, len);
 196 }
 197
 198 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 199 {
 200     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 201
 202     switch (cmd) {
 203     case VOICE_ENABLE:
 204         if (out->active) {
 205             break;
 206         }
 207         out->active = 1;
 208         rate_start (&out->rate);
 209         spice_server_playback_start (&out->sin);
 210         break;
 211     case VOICE_DISABLE:
 212         if (!out->active) {
 213             break;
 214         }
 215         out->active = 0;
 216         if (out->frame) {
 217             memset (out->fpos, 0, out->fsize << 2);
 218             spice_server_playback_put_samples (&out->sin, out->frame);
 219             out->frame = out->fpos = NULL;
 220         }
 221         spice_server_playback_stop (&out->sin);
 222         break;
 223     case VOICE_VOLUME:
 224         {
 225 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 226             SWVoiceOut *sw;
 227             va_list ap;
 228             uint16_t vol[2];
 229
 230             va_start (ap, cmd);
 231             sw = va_arg (ap, SWVoiceOut *);
 232             va_end (ap);
 233
 234             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 235             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 236             spice_server_playback_set_volume (&out->sin, 2, vol);
 237             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 238 #endif
 239             break;
 240         }
 241     }
 242
 243     return 0;
 244 }
 245
 246 /* record */
 247
 248 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 249 {
 250     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 251     struct audsettings settings;
 252
 253 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 254     settings.freq       = spice_server_get_best_record_rate(NULL);
 255 #else
 256     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 257 #endif
 258     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 259     settings.fmt        = AUD_FMT_S16;
 260     settings.endianness = AUDIO_HOST_ENDIANNESS;
 261
 262     audio_pcm_init_info (&hw->info, &settings);
 263     hw->samples = LINE_IN_SAMPLES;
 264     in->active = 0;
 265
 266     in->sin.base.sif = &record_sif.base;
 267     qemu_spice_add_interface (&in->sin.base);
 268 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 269     spice_server_set_record_rate(&in->sin, settings.freq);
 270 #endif
 271     return 0;
 272 }
 273
 274 static void line_in_fini (HWVoiceIn *hw)
 275 {
 276     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 277
 278     spice_server_remove_interface (&in->sin.base);
 279 }
 280
 281 static int line_in_run (HWVoiceIn *hw)
 282 {
 283     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 284     int num_samples;
 285     int ready;
 286     int len[2];
 287     uint64_t delta_samp;
 288     const uint32_t *samples;
 289
 290     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
 291         return 0;
 292     }
 293
 294     delta_samp = rate_get_samples (&hw->info, &in->rate);
 295     num_samples = audio_MIN (num_samples, delta_samp);
 296
 297     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
 298     samples = in->samples;
 299     if (ready == 0) {
 300         static const uint32_t silence[LINE_IN_SAMPLES];
 301         samples = silence;
 302         ready = LINE_IN_SAMPLES;
 303     }
 304
 305     num_samples = audio_MIN (ready, num_samples);
 306
 307     if (hw->wpos + num_samples > hw->samples) {
 308         len[0] = hw->samples - hw->wpos;
 309         len[1] = num_samples - len[0];
 310     } else {
 311         len[0] = num_samples;
 312         len[1] = 0;
 313     }
 314
 315     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
 316
 317     if (len[1]) {
 318         hw->conv (hw->conv_buf, samples + len[0], len[1]);
 319     }
 320
 321     hw->wpos = (hw->wpos + num_samples) % hw->samples;
 322
 323     return num_samples;
 324 }
 325
 326 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
 327 {
 328     return audio_pcm_sw_read (sw, buf, size);
 329 }
 330
 331 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 332 {
 333     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 334
 335     switch (cmd) {
 336     case VOICE_ENABLE:
 337         if (in->active) {
 338             break;
 339         }
 340         in->active = 1;
 341         rate_start (&in->rate);
 342         spice_server_record_start (&in->sin);
 343         break;
 344     case VOICE_DISABLE:
 345         if (!in->active) {
 346             break;
 347         }
 348         in->active = 0;
 349         spice_server_record_stop (&in->sin);
 350         break;
 351     case VOICE_VOLUME:
 352         {
 353 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 354             SWVoiceIn *sw;
 355             va_list ap;
 356             uint16_t vol[2];
 357
 358             va_start (ap, cmd);
 359             sw = va_arg (ap, SWVoiceIn *);
 360             va_end (ap);
 361
 362             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 363             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 364             spice_server_record_set_volume (&in->sin, 2, vol);
 365             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 366 #endif
 367             break;
 368         }
 369     }
 370
 371     return 0;
 372 }
 373
 374 static struct audio_option audio_options[] = {
 375     { /* end of list */ },
 376 };
 377
 378 static struct audio_pcm_ops audio_callbacks = {
 379     .init_out = line_out_init,
 380     .fini_out = line_out_fini,
 381     .run_out  = line_out_run,
 382     .write    = line_out_write,
 383     .ctl_out  = line_out_ctl,
 384
 385     .init_in  = line_in_init,
 386     .fini_in  = line_in_fini,
 387     .run_in   = line_in_run,
 388     .read     = line_in_read,
 389     .ctl_in   = line_in_ctl,
 390 };
 391
 392 struct audio_driver spice_audio_driver = {
 393     .name           = "spice",
 394     .descr          = "spice audio driver",
 395     .options        = audio_options,
 396     .init           = spice_audio_init,
 397     .fini           = spice_audio_fini,
 398     .pcm_ops        = &audio_callbacks,
 399     .max_voices_out = 1,
 400     .max_voices_in  = 1,
 401     .voice_size_out = sizeof (SpiceVoiceOut),
 402     .voice_size_in  = sizeof (SpiceVoiceIn),
 403 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 404     .ctl_caps       = VOICE_VOLUME_CAP
 405 #endif
 406 };
 407
 408 void qemu_spice_audio_init (void)
 409 {
 410     spice_audio_driver.can_be_default = 1;
 411 }