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         fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", 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 {
 120     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 121     struct audsettings settings;
 122
 123 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 124     settings.freq       = spice_server_get_best_playback_rate(NULL);
 125 #else
 126     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 127 #endif
 128     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 129     settings.fmt        = AUD_FMT_S16;
 130     settings.endianness = AUDIO_HOST_ENDIANNESS;
 131
 132     audio_pcm_init_info (&hw->info, &settings);
 133     hw->samples = LINE_OUT_SAMPLES;
 134     out->active = 0;
 135
 136     out->sin.base.sif = &playback_sif.base;
 137     qemu_spice_add_interface (&out->sin.base);
 138 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 139     spice_server_set_playback_rate(&out->sin, settings.freq);
 140 #endif
 141     return 0;
 142 }
 143
 144 static void line_out_fini (HWVoiceOut *hw)
 145 {
 146     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 147
 148     spice_server_remove_interface (&out->sin.base);
 149 }
 150
 151 static int line_out_run (HWVoiceOut *hw, int live)
 152 {
 153     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 154     int rpos, decr;
 155     int samples;
 156
 157     if (!live) {
 158         return 0;
 159     }
 160
 161     decr = rate_get_samples (&hw->info, &out->rate);
 162     decr = audio_MIN (live, decr);
 163
 164     samples = decr;
 165     rpos = hw->rpos;
 166     while (samples) {
 167         int left_till_end_samples = hw->samples - rpos;
 168         int len = audio_MIN (samples, left_till_end_samples);
 169
 170         if (!out->frame) {
 171             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
 172             out->fpos = out->frame;
 173         }
 174         if (out->frame) {
 175             len = audio_MIN (len, out->fsize);
 176             hw->clip (out->fpos, hw->mix_buf + rpos, len);
 177             out->fsize -= len;
 178             out->fpos  += len;
 179             if (out->fsize == 0) {
 180                 spice_server_playback_put_samples (&out->sin, out->frame);
 181                 out->frame = out->fpos = NULL;
 182             }
 183         }
 184         rpos = (rpos + len) % hw->samples;
 185         samples -= len;
 186     }
 187     hw->rpos = rpos;
 188     return decr;
 189 }
 190
 191 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
 192 {
 193     return audio_pcm_sw_write (sw, buf, len);
 194 }
 195
 196 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 197 {
 198     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 199
 200     switch (cmd) {
 201     case VOICE_ENABLE:
 202         if (out->active) {
 203             break;
 204         }
 205         out->active = 1;
 206         rate_start (&out->rate);
 207         spice_server_playback_start (&out->sin);
 208         break;
 209     case VOICE_DISABLE:
 210         if (!out->active) {
 211             break;
 212         }
 213         out->active = 0;
 214         if (out->frame) {
 215             memset (out->fpos, 0, out->fsize << 2);
 216             spice_server_playback_put_samples (&out->sin, out->frame);
 217             out->frame = out->fpos = NULL;
 218         }
 219         spice_server_playback_stop (&out->sin);
 220         break;
 221     case VOICE_VOLUME:
 222         {
 223 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 224             SWVoiceOut *sw;
 225             va_list ap;
 226             uint16_t vol[2];
 227
 228             va_start (ap, cmd);
 229             sw = va_arg (ap, SWVoiceOut *);
 230             va_end (ap);
 231
 232             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 233             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 234             spice_server_playback_set_volume (&out->sin, 2, vol);
 235             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 236 #endif
 237             break;
 238         }
 239     }
 240
 241     return 0;
 242 }
 243
 244 /* record */
 245
 246 static int line_in_init (HWVoiceIn *hw, struct audsettings *as)
 247 {
 248     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 249     struct audsettings settings;
 250
 251 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 252     settings.freq       = spice_server_get_best_record_rate(NULL);
 253 #else
 254     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 255 #endif
 256     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 257     settings.fmt        = AUD_FMT_S16;
 258     settings.endianness = AUDIO_HOST_ENDIANNESS;
 259
 260     audio_pcm_init_info (&hw->info, &settings);
 261     hw->samples = LINE_IN_SAMPLES;
 262     in->active = 0;
 263
 264     in->sin.base.sif = &record_sif.base;
 265     qemu_spice_add_interface (&in->sin.base);
 266 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 267     spice_server_set_record_rate(&in->sin, settings.freq);
 268 #endif
 269     return 0;
 270 }
 271
 272 static void line_in_fini (HWVoiceIn *hw)
 273 {
 274     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 275
 276     spice_server_remove_interface (&in->sin.base);
 277 }
 278
 279 static int line_in_run (HWVoiceIn *hw)
 280 {
 281     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 282     int num_samples;
 283     int ready;
 284     int len[2];
 285     uint64_t delta_samp;
 286     const uint32_t *samples;
 287
 288     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
 289         return 0;
 290     }
 291
 292     delta_samp = rate_get_samples (&hw->info, &in->rate);
 293     num_samples = audio_MIN (num_samples, delta_samp);
 294
 295     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
 296     samples = in->samples;
 297     if (ready == 0) {
 298         static const uint32_t silence[LINE_IN_SAMPLES];
 299         samples = silence;
 300         ready = LINE_IN_SAMPLES;
 301     }
 302
 303     num_samples = audio_MIN (ready, num_samples);
 304
 305     if (hw->wpos + num_samples > hw->samples) {
 306         len[0] = hw->samples - hw->wpos;
 307         len[1] = num_samples - len[0];
 308     } else {
 309         len[0] = num_samples;
 310         len[1] = 0;
 311     }
 312
 313     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
 314
 315     if (len[1]) {
 316         hw->conv (hw->conv_buf, samples + len[0], len[1]);
 317     }
 318
 319     hw->wpos = (hw->wpos + num_samples) % hw->samples;
 320
 321     return num_samples;
 322 }
 323
 324 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
 325 {
 326     return audio_pcm_sw_read (sw, buf, size);
 327 }
 328
 329 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 330 {
 331     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 332
 333     switch (cmd) {
 334     case VOICE_ENABLE:
 335         if (in->active) {
 336             break;
 337         }
 338         in->active = 1;
 339         rate_start (&in->rate);
 340         spice_server_record_start (&in->sin);
 341         break;
 342     case VOICE_DISABLE:
 343         if (!in->active) {
 344             break;
 345         }
 346         in->active = 0;
 347         spice_server_record_stop (&in->sin);
 348         break;
 349     case VOICE_VOLUME:
 350         {
 351 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 352             SWVoiceIn *sw;
 353             va_list ap;
 354             uint16_t vol[2];
 355
 356             va_start (ap, cmd);
 357             sw = va_arg (ap, SWVoiceIn *);
 358             va_end (ap);
 359
 360             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 361             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 362             spice_server_record_set_volume (&in->sin, 2, vol);
 363             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 364 #endif
 365             break;
 366         }
 367     }
 368
 369     return 0;
 370 }
 371
 372 static struct audio_option audio_options[] = {
 373     { /* end of list */ },
 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 struct audio_driver spice_audio_driver = {
 391     .name           = "spice",
 392     .descr          = "spice audio driver",
 393     .options        = audio_options,
 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 }