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/error-report.h"
  24 #include "qemu/timer.h"
  25 #include "ui/qemu-spice.h"
  26
  27 #define AUDIO_CAP "spice"
  28 #include "audio.h"
  29 #include "audio_int.h"
  30
  31 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  32 #define LINE_OUT_SAMPLES (480 * 4)
  33 #else
  34 #define LINE_OUT_SAMPLES (256 * 4)
  35 #endif
  36
  37 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
  38 #define LINE_IN_SAMPLES (480 * 4)
  39 #else
  40 #define LINE_IN_SAMPLES (256 * 4)
  41 #endif
  42
  43 typedef struct SpiceRateCtl {
  44     int64_t               start_ticks;
  45     int64_t               bytes_sent;
  46 } SpiceRateCtl;
  47
  48 typedef struct SpiceVoiceOut {
  49     HWVoiceOut            hw;
  50     SpicePlaybackInstance sin;
  51     SpiceRateCtl          rate;
  52     int                   active;
  53     uint32_t              *frame;
  54     uint32_t              *fpos;
  55     uint32_t              fsize;
  56 } SpiceVoiceOut;
  57
  58 typedef struct SpiceVoiceIn {
  59     HWVoiceIn             hw;
  60     SpiceRecordInstance   sin;
  61     SpiceRateCtl          rate;
  62     int                   active;
  63     uint32_t              samples[LINE_IN_SAMPLES];
  64 } SpiceVoiceIn;
  65
  66 static const SpicePlaybackInterface playback_sif = {
  67     .base.type          = SPICE_INTERFACE_PLAYBACK,
  68     .base.description   = "playback",
  69     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  70     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  71 };
  72
  73 static const SpiceRecordInterface record_sif = {
  74     .base.type          = SPICE_INTERFACE_RECORD,
  75     .base.description   = "record",
  76     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  77     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  78 };
  79
  80 static void *spice_audio_init(Audiodev *dev)
  81 {
  82     if (!using_spice) {
  83         return NULL;
  84     }
  85     return &spice_audio_init;
  86 }
  87
  88 static void spice_audio_fini (void *opaque)
  89 {
  90     /* nothing */
  91 }
  92
  93 static void rate_start (SpiceRateCtl *rate)
  94 {
  95     memset (rate, 0, sizeof (*rate));
  96     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  97 }
  98
  99 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
 100 {
 101     int64_t now;
 102     int64_t ticks;
 103     int64_t bytes;
 104     int64_t samples;
 105
 106     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 107     ticks = now - rate->start_ticks;
 108     bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
 109     samples = (bytes - rate->bytes_sent) >> info->shift;
 110     if (samples < 0 || samples > 65536) {
 111         error_report("Resetting rate control (%" PRId64 " samples)", samples);
 112         rate_start(rate);
 113         samples = 0;
 114     }
 115     rate->bytes_sent += samples << info->shift;
 116     return samples;
 117 }
 118
 119 /* playback */
 120
 121 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
 122                          void *drv_opaque)
 123 {
 124     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 125     struct audsettings settings;
 126
 127 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 128     settings.freq       = spice_server_get_best_playback_rate(NULL);
 129 #else
 130     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 131 #endif
 132     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 133     settings.fmt        = AUDIO_FORMAT_S16;
 134     settings.endianness = AUDIO_HOST_ENDIANNESS;
 135
 136     audio_pcm_init_info (&hw->info, &settings);
 137     hw->samples = LINE_OUT_SAMPLES;
 138     out->active = 0;
 139
 140     out->sin.base.sif = &playback_sif.base;
 141     qemu_spice_add_interface (&out->sin.base);
 142 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 143     spice_server_set_playback_rate(&out->sin, settings.freq);
 144 #endif
 145     return 0;
 146 }
 147
 148 static void line_out_fini (HWVoiceOut *hw)
 149 {
 150     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 151
 152     spice_server_remove_interface (&out->sin.base);
 153 }
 154
 155 static int line_out_run (HWVoiceOut *hw, int live)
 156 {
 157     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 158     int rpos, decr;
 159     int samples;
 160
 161     if (!live) {
 162         return 0;
 163     }
 164
 165     decr = rate_get_samples (&hw->info, &out->rate);
 166     decr = audio_MIN (live, decr);
 167
 168     samples = decr;
 169     rpos = hw->rpos;
 170     while (samples) {
 171         int left_till_end_samples = hw->samples - rpos;
 172         int len = audio_MIN (samples, left_till_end_samples);
 173
 174         if (!out->frame) {
 175             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
 176             out->fpos = out->frame;
 177         }
 178         if (out->frame) {
 179             len = audio_MIN (len, out->fsize);
 180             hw->clip (out->fpos, hw->mix_buf + rpos, len);
 181             out->fsize -= len;
 182             out->fpos  += len;
 183             if (out->fsize == 0) {
 184                 spice_server_playback_put_samples (&out->sin, out->frame);
 185                 out->frame = out->fpos = NULL;
 186             }
 187         }
 188         rpos = (rpos + len) % hw->samples;
 189         samples -= len;
 190     }
 191     hw->rpos = rpos;
 192     return decr;
 193 }
 194
 195 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
 196 {
 197     return audio_pcm_sw_write (sw, buf, len);
 198 }
 199
 200 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 201 {
 202     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 203
 204     switch (cmd) {
 205     case VOICE_ENABLE:
 206         if (out->active) {
 207             break;
 208         }
 209         out->active = 1;
 210         rate_start (&out->rate);
 211         spice_server_playback_start (&out->sin);
 212         break;
 213     case VOICE_DISABLE:
 214         if (!out->active) {
 215             break;
 216         }
 217         out->active = 0;
 218         if (out->frame) {
 219             memset (out->fpos, 0, out->fsize << 2);
 220             spice_server_playback_put_samples (&out->sin, out->frame);
 221             out->frame = out->fpos = NULL;
 222         }
 223         spice_server_playback_stop (&out->sin);
 224         break;
 225     case VOICE_VOLUME:
 226         {
 227 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 228             SWVoiceOut *sw;
 229             va_list ap;
 230             uint16_t vol[2];
 231
 232             va_start (ap, cmd);
 233             sw = va_arg (ap, SWVoiceOut *);
 234             va_end (ap);
 235
 236             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 237             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 238             spice_server_playback_set_volume (&out->sin, 2, vol);
 239             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 240 #endif
 241             break;
 242         }
 243     }
 244
 245     return 0;
 246 }
 247
 248 /* record */
 249
 250 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 251 {
 252     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 253     struct audsettings settings;
 254
 255 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 256     settings.freq       = spice_server_get_best_record_rate(NULL);
 257 #else
 258     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 259 #endif
 260     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 261     settings.fmt        = AUDIO_FORMAT_S16;
 262     settings.endianness = AUDIO_HOST_ENDIANNESS;
 263
 264     audio_pcm_init_info (&hw->info, &settings);
 265     hw->samples = LINE_IN_SAMPLES;
 266     in->active = 0;
 267
 268     in->sin.base.sif = &record_sif.base;
 269     qemu_spice_add_interface (&in->sin.base);
 270 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 271     spice_server_set_record_rate(&in->sin, settings.freq);
 272 #endif
 273     return 0;
 274 }
 275
 276 static void line_in_fini (HWVoiceIn *hw)
 277 {
 278     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 279
 280     spice_server_remove_interface (&in->sin.base);
 281 }
 282
 283 static int line_in_run (HWVoiceIn *hw)
 284 {
 285     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 286     int num_samples;
 287     int ready;
 288     int len[2];
 289     uint64_t delta_samp;
 290     const uint32_t *samples;
 291
 292     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
 293         return 0;
 294     }
 295
 296     delta_samp = rate_get_samples (&hw->info, &in->rate);
 297     num_samples = audio_MIN (num_samples, delta_samp);
 298
 299     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
 300     samples = in->samples;
 301     if (ready == 0) {
 302         static const uint32_t silence[LINE_IN_SAMPLES];
 303         samples = silence;
 304         ready = LINE_IN_SAMPLES;
 305     }
 306
 307     num_samples = audio_MIN (ready, num_samples);
 308
 309     if (hw->wpos + num_samples > hw->samples) {
 310         len[0] = hw->samples - hw->wpos;
 311         len[1] = num_samples - len[0];
 312     } else {
 313         len[0] = num_samples;
 314         len[1] = 0;
 315     }
 316
 317     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
 318
 319     if (len[1]) {
 320         hw->conv (hw->conv_buf, samples + len[0], len[1]);
 321     }
 322
 323     hw->wpos = (hw->wpos + num_samples) % hw->samples;
 324
 325     return num_samples;
 326 }
 327
 328 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
 329 {
 330     return audio_pcm_sw_read (sw, buf, size);
 331 }
 332
 333 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 334 {
 335     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 336
 337     switch (cmd) {
 338     case VOICE_ENABLE:
 339         if (in->active) {
 340             break;
 341         }
 342         in->active = 1;
 343         rate_start (&in->rate);
 344         spice_server_record_start (&in->sin);
 345         break;
 346     case VOICE_DISABLE:
 347         if (!in->active) {
 348             break;
 349         }
 350         in->active = 0;
 351         spice_server_record_stop (&in->sin);
 352         break;
 353     case VOICE_VOLUME:
 354         {
 355 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 356             SWVoiceIn *sw;
 357             va_list ap;
 358             uint16_t vol[2];
 359
 360             va_start (ap, cmd);
 361             sw = va_arg (ap, SWVoiceIn *);
 362             va_end (ap);
 363
 364             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 365             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 366             spice_server_record_set_volume (&in->sin, 2, vol);
 367             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 368 #endif
 369             break;
 370         }
 371     }
 372
 373     return 0;
 374 }
 375
 376 static struct audio_pcm_ops audio_callbacks = {
 377     .init_out = line_out_init,
 378     .fini_out = line_out_fini,
 379     .run_out  = line_out_run,
 380     .write    = line_out_write,
 381     .ctl_out  = line_out_ctl,
 382
 383     .init_in  = line_in_init,
 384     .fini_in  = line_in_fini,
 385     .run_in   = line_in_run,
 386     .read     = line_in_read,
 387     .ctl_in   = line_in_ctl,
 388 };
 389
 390 static struct audio_driver spice_audio_driver = {
 391     .name           = "spice",
 392     .descr          = "spice audio driver",
 393     .init           = spice_audio_init,
 394     .fini           = spice_audio_fini,
 395     .pcm_ops        = &audio_callbacks,
 396     .max_voices_out = 1,
 397     .max_voices_in  = 1,
 398     .voice_size_out = sizeof (SpiceVoiceOut),
 399     .voice_size_in  = sizeof (SpiceVoiceIn),
 400 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 401     .ctl_caps       = VOICE_VOLUME_CAP
 402 #endif
 403 };
 404
 405 void qemu_spice_audio_init (void)
 406 {
 407     spice_audio_driver.can_be_default = 1;
 408 }
 409
 410 static void register_audio_spice(void)
 411 {
 412     audio_driver_register(&spice_audio_driver);
 413 }
 414 type_init(register_audio_spice);