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/error-report.h"
  23 #include "qemu/timer.h"
  24 #include "ui/qemu-spice.h"
  25
  26 #define AUDIO_CAP "spice"
  27 #include "audio.h"
  28 #include "audio_int.h"
  29
  30 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  31 #define LINE_OUT_SAMPLES (480 * 4)
  32 #else
  33 #define LINE_OUT_SAMPLES (256 * 4)
  34 #endif
  35
  36 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
  37 #define LINE_IN_SAMPLES (480 * 4)
  38 #else
  39 #define LINE_IN_SAMPLES (256 * 4)
  40 #endif
  41
  42 typedef struct SpiceRateCtl {
  43     int64_t               start_ticks;
  44     int64_t               bytes_sent;
  45 } SpiceRateCtl;
  46
  47 typedef struct SpiceVoiceOut {
  48     HWVoiceOut            hw;
  49     SpicePlaybackInstance sin;
  50     SpiceRateCtl          rate;
  51     int                   active;
  52     uint32_t              *frame;
  53     uint32_t              *fpos;
  54     uint32_t              fsize;
  55 } SpiceVoiceOut;
  56
  57 typedef struct SpiceVoiceIn {
  58     HWVoiceIn             hw;
  59     SpiceRecordInstance   sin;
  60     SpiceRateCtl          rate;
  61     int                   active;
  62     uint32_t              samples[LINE_IN_SAMPLES];
  63 } SpiceVoiceIn;
  64
  65 static const SpicePlaybackInterface playback_sif = {
  66     .base.type          = SPICE_INTERFACE_PLAYBACK,
  67     .base.description   = "playback",
  68     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  69     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  70 };
  71
  72 static const SpiceRecordInterface record_sif = {
  73     .base.type          = SPICE_INTERFACE_RECORD,
  74     .base.description   = "record",
  75     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  76     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  77 };
  78
  79 static void *spice_audio_init (void)
  80 {
  81     if (!using_spice) {
  82         return NULL;
  83     }
  84     return &spice_audio_init;
  85 }
  86
  87 static void spice_audio_fini (void *opaque)
  88 {
  89     /* nothing */
  90 }
  91
  92 static void rate_start (SpiceRateCtl *rate)
  93 {
  94     memset (rate, 0, sizeof (*rate));
  95     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  96 }
  97
  98 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
  99 {
 100     int64_t now;
 101     int64_t ticks;
 102     int64_t bytes;
 103     int64_t samples;
 104
 105     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 106     ticks = now - rate->start_ticks;
 107     bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
 108     samples = (bytes - rate->bytes_sent) >> info->shift;
 109     if (samples < 0 || samples > 65536) {
 110         error_report("Resetting rate control (%" PRId64 " samples)", samples);
 111         rate_start(rate);
 112         samples = 0;
 113     }
 114     rate->bytes_sent += samples << info->shift;
 115     return samples;
 116 }
 117
 118 /* playback */
 119
 120 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
 121                          void *drv_opaque)
 122 {
 123     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 124     struct audsettings settings;
 125
 126 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 127     settings.freq       = spice_server_get_best_playback_rate(NULL);
 128 #else
 129     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 130 #endif
 131     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 132     settings.fmt        = AUD_FMT_S16;
 133     settings.endianness = AUDIO_HOST_ENDIANNESS;
 134
 135     audio_pcm_init_info (&hw->info, &settings);
 136     hw->samples = LINE_OUT_SAMPLES;
 137     out->active = 0;
 138
 139     out->sin.base.sif = &playback_sif.base;
 140     qemu_spice_add_interface (&out->sin.base);
 141 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 142     spice_server_set_playback_rate(&out->sin, settings.freq);
 143 #endif
 144     return 0;
 145 }
 146
 147 static void line_out_fini (HWVoiceOut *hw)
 148 {
 149     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 150
 151     spice_server_remove_interface (&out->sin.base);
 152 }
 153
 154 static int line_out_run (HWVoiceOut *hw, int live)
 155 {
 156     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 157     int rpos, decr;
 158     int samples;
 159
 160     if (!live) {
 161         return 0;
 162     }
 163
 164     decr = rate_get_samples (&hw->info, &out->rate);
 165     decr = audio_MIN (live, decr);
 166
 167     samples = decr;
 168     rpos = hw->rpos;
 169     while (samples) {
 170         int left_till_end_samples = hw->samples - rpos;
 171         int len = audio_MIN (samples, left_till_end_samples);
 172
 173         if (!out->frame) {
 174             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
 175             out->fpos = out->frame;
 176         }
 177         if (out->frame) {
 178             len = audio_MIN (len, out->fsize);
 179             hw->clip (out->fpos, hw->mix_buf + rpos, len);
 180             out->fsize -= len;
 181             out->fpos  += len;
 182             if (out->fsize == 0) {
 183                 spice_server_playback_put_samples (&out->sin, out->frame);
 184                 out->frame = out->fpos = NULL;
 185             }
 186         }
 187         rpos = (rpos + len) % hw->samples;
 188         samples -= len;
 189     }
 190     hw->rpos = rpos;
 191     return decr;
 192 }
 193
 194 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
 195 {
 196     return audio_pcm_sw_write (sw, buf, len);
 197 }
 198
 199 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 200 {
 201     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 202
 203     switch (cmd) {
 204     case VOICE_ENABLE:
 205         if (out->active) {
 206             break;
 207         }
 208         out->active = 1;
 209         rate_start (&out->rate);
 210         spice_server_playback_start (&out->sin);
 211         break;
 212     case VOICE_DISABLE:
 213         if (!out->active) {
 214             break;
 215         }
 216         out->active = 0;
 217         if (out->frame) {
 218             memset (out->fpos, 0, out->fsize << 2);
 219             spice_server_playback_put_samples (&out->sin, out->frame);
 220             out->frame = out->fpos = NULL;
 221         }
 222         spice_server_playback_stop (&out->sin);
 223         break;
 224     case VOICE_VOLUME:
 225         {
 226 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 227             SWVoiceOut *sw;
 228             va_list ap;
 229             uint16_t vol[2];
 230
 231             va_start (ap, cmd);
 232             sw = va_arg (ap, SWVoiceOut *);
 233             va_end (ap);
 234
 235             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 236             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 237             spice_server_playback_set_volume (&out->sin, 2, vol);
 238             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 239 #endif
 240             break;
 241         }
 242     }
 243
 244     return 0;
 245 }
 246
 247 /* record */
 248
 249 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 250 {
 251     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 252     struct audsettings settings;
 253
 254 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 255     settings.freq       = spice_server_get_best_record_rate(NULL);
 256 #else
 257     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 258 #endif
 259     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 260     settings.fmt        = AUD_FMT_S16;
 261     settings.endianness = AUDIO_HOST_ENDIANNESS;
 262
 263     audio_pcm_init_info (&hw->info, &settings);
 264     hw->samples = LINE_IN_SAMPLES;
 265     in->active = 0;
 266
 267     in->sin.base.sif = &record_sif.base;
 268     qemu_spice_add_interface (&in->sin.base);
 269 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 270     spice_server_set_record_rate(&in->sin, settings.freq);
 271 #endif
 272     return 0;
 273 }
 274
 275 static void line_in_fini (HWVoiceIn *hw)
 276 {
 277     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 278
 279     spice_server_remove_interface (&in->sin.base);
 280 }
 281
 282 static int line_in_run (HWVoiceIn *hw)
 283 {
 284     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 285     int num_samples;
 286     int ready;
 287     int len[2];
 288     uint64_t delta_samp;
 289     const uint32_t *samples;
 290
 291     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
 292         return 0;
 293     }
 294
 295     delta_samp = rate_get_samples (&hw->info, &in->rate);
 296     num_samples = audio_MIN (num_samples, delta_samp);
 297
 298     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
 299     samples = in->samples;
 300     if (ready == 0) {
 301         static const uint32_t silence[LINE_IN_SAMPLES];
 302         samples = silence;
 303         ready = LINE_IN_SAMPLES;
 304     }
 305
 306     num_samples = audio_MIN (ready, num_samples);
 307
 308     if (hw->wpos + num_samples > hw->samples) {
 309         len[0] = hw->samples - hw->wpos;
 310         len[1] = num_samples - len[0];
 311     } else {
 312         len[0] = num_samples;
 313         len[1] = 0;
 314     }
 315
 316     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
 317
 318     if (len[1]) {
 319         hw->conv (hw->conv_buf, samples + len[0], len[1]);
 320     }
 321
 322     hw->wpos = (hw->wpos + num_samples) % hw->samples;
 323
 324     return num_samples;
 325 }
 326
 327 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
 328 {
 329     return audio_pcm_sw_read (sw, buf, size);
 330 }
 331
 332 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 333 {
 334     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 335
 336     switch (cmd) {
 337     case VOICE_ENABLE:
 338         if (in->active) {
 339             break;
 340         }
 341         in->active = 1;
 342         rate_start (&in->rate);
 343         spice_server_record_start (&in->sin);
 344         break;
 345     case VOICE_DISABLE:
 346         if (!in->active) {
 347             break;
 348         }
 349         in->active = 0;
 350         spice_server_record_stop (&in->sin);
 351         break;
 352     case VOICE_VOLUME:
 353         {
 354 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 355             SWVoiceIn *sw;
 356             va_list ap;
 357             uint16_t vol[2];
 358
 359             va_start (ap, cmd);
 360             sw = va_arg (ap, SWVoiceIn *);
 361             va_end (ap);
 362
 363             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 364             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 365             spice_server_record_set_volume (&in->sin, 2, vol);
 366             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 367 #endif
 368             break;
 369         }
 370     }
 371
 372     return 0;
 373 }
 374
 375 static struct audio_option audio_options[] = {
 376     { /* end of list */ },
 377 };
 378
 379 static struct audio_pcm_ops audio_callbacks = {
 380     .init_out = line_out_init,
 381     .fini_out = line_out_fini,
 382     .run_out  = line_out_run,
 383     .write    = line_out_write,
 384     .ctl_out  = line_out_ctl,
 385
 386     .init_in  = line_in_init,
 387     .fini_in  = line_in_fini,
 388     .run_in   = line_in_run,
 389     .read     = line_in_read,
 390     .ctl_in   = line_in_ctl,
 391 };
 392
 393 struct audio_driver spice_audio_driver = {
 394     .name           = "spice",
 395     .descr          = "spice audio driver",
 396     .options        = audio_options,
 397     .init           = spice_audio_init,
 398     .fini           = spice_audio_fini,
 399     .pcm_ops        = &audio_callbacks,
 400     .max_voices_out = 1,
 401     .max_voices_in  = 1,
 402     .voice_size_out = sizeof (SpiceVoiceOut),
 403     .voice_size_in  = sizeof (SpiceVoiceIn),
 404 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 405     .ctl_caps       = VOICE_VOLUME_CAP
 406 #endif
 407 };
 408
 409 void qemu_spice_audio_init (void)
 410 {
 411     spice_audio_driver.can_be_default = 1;
 412 }