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 "qemu/host-utils.h"
  22 #include "qemu/module.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 } 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(Audiodev *dev)
  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        = AUDIO_FORMAT_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 void *line_out_get_buffer(HWVoiceOut *hw, size_t *size)
 155 {
 156     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 157     size_t decr;
 158
 159     if (!out->frame) {
 160         spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize);
 161         out->fpos = 0;
 162     }
 163
 164     if (out->frame) {
 165         decr = rate_get_samples(&hw->info, &out->rate);
 166         decr = MIN(out->fsize - out->fpos, decr);
 167
 168         *size = decr << hw->info.shift;
 169     } else {
 170         rate_start(&out->rate);
 171     }
 172     return out->frame + out->fpos;
 173 }
 174
 175 static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size)
 176 {
 177     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 178
 179     assert(buf == out->frame + out->fpos && out->fpos <= out->fsize);
 180     out->fpos += size >> 2;
 181
 182     if (out->fpos == out->fsize) { /* buffer full */
 183         spice_server_playback_put_samples(&out->sin, out->frame);
 184         out->frame = NULL;
 185     }
 186
 187     return size;
 188 }
 189
 190 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 191 {
 192     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 193
 194     switch (cmd) {
 195     case VOICE_ENABLE:
 196         if (out->active) {
 197             break;
 198         }
 199         out->active = 1;
 200         rate_start (&out->rate);
 201         spice_server_playback_start (&out->sin);
 202         break;
 203     case VOICE_DISABLE:
 204         if (!out->active) {
 205             break;
 206         }
 207         out->active = 0;
 208         if (out->frame) {
 209             memset(out->frame + out->fpos, 0, (out->fsize - out->fpos) << 2);
 210             spice_server_playback_put_samples (&out->sin, out->frame);
 211             out->frame = NULL;
 212         }
 213         spice_server_playback_stop (&out->sin);
 214         break;
 215     case VOICE_VOLUME:
 216         {
 217 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 218             SWVoiceOut *sw;
 219             va_list ap;
 220             uint16_t vol[2];
 221
 222             va_start (ap, cmd);
 223             sw = va_arg (ap, SWVoiceOut *);
 224             va_end (ap);
 225
 226             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 227             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 228             spice_server_playback_set_volume (&out->sin, 2, vol);
 229             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
 230 #endif
 231             break;
 232         }
 233     }
 234
 235     return 0;
 236 }
 237
 238 /* record */
 239
 240 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 241 {
 242     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 243     struct audsettings settings;
 244
 245 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 246     settings.freq       = spice_server_get_best_record_rate(NULL);
 247 #else
 248     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 249 #endif
 250     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 251     settings.fmt        = AUDIO_FORMAT_S16;
 252     settings.endianness = AUDIO_HOST_ENDIANNESS;
 253
 254     audio_pcm_init_info (&hw->info, &settings);
 255     hw->samples = LINE_IN_SAMPLES;
 256     in->active = 0;
 257
 258     in->sin.base.sif = &record_sif.base;
 259     qemu_spice_add_interface (&in->sin.base);
 260 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 261     spice_server_set_record_rate(&in->sin, settings.freq);
 262 #endif
 263     return 0;
 264 }
 265
 266 static void line_in_fini (HWVoiceIn *hw)
 267 {
 268     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 269
 270     spice_server_remove_interface (&in->sin.base);
 271 }
 272
 273 static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len)
 274 {
 275     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 276     uint64_t delta_samp = rate_get_samples(&hw->info, &in->rate);
 277     uint64_t to_read = MIN(len >> 2, delta_samp);
 278     size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read);
 279
 280     /* XXX: do we need this? */
 281     if (ready == 0) {
 282         memset(buf, 0, to_read << 2);
 283         ready = to_read;
 284     }
 285
 286     return ready << 2;
 287 }
 288
 289 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 290 {
 291     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 292
 293     switch (cmd) {
 294     case VOICE_ENABLE:
 295         if (in->active) {
 296             break;
 297         }
 298         in->active = 1;
 299         rate_start (&in->rate);
 300         spice_server_record_start (&in->sin);
 301         break;
 302     case VOICE_DISABLE:
 303         if (!in->active) {
 304             break;
 305         }
 306         in->active = 0;
 307         spice_server_record_stop (&in->sin);
 308         break;
 309     case VOICE_VOLUME:
 310         {
 311 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 312             SWVoiceIn *sw;
 313             va_list ap;
 314             uint16_t vol[2];
 315
 316             va_start (ap, cmd);
 317             sw = va_arg (ap, SWVoiceIn *);
 318             va_end (ap);
 319
 320             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
 321             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
 322             spice_server_record_set_volume (&in->sin, 2, vol);
 323             spice_server_record_set_mute (&in->sin, sw->vol.mute);
 324 #endif
 325             break;
 326         }
 327     }
 328
 329     return 0;
 330 }
 331
 332 static struct audio_pcm_ops audio_callbacks = {
 333     .init_out = line_out_init,
 334     .fini_out = line_out_fini,
 335     .write    = audio_generic_write,
 336     .get_buffer_out = line_out_get_buffer,
 337     .put_buffer_out = line_out_put_buffer,
 338     .ctl_out  = line_out_ctl,
 339
 340     .init_in  = line_in_init,
 341     .fini_in  = line_in_fini,
 342     .read     = line_in_read,
 343     .ctl_in   = line_in_ctl,
 344 };
 345
 346 static struct audio_driver spice_audio_driver = {
 347     .name           = "spice",
 348     .descr          = "spice audio driver",
 349     .init           = spice_audio_init,
 350     .fini           = spice_audio_fini,
 351     .pcm_ops        = &audio_callbacks,
 352     .max_voices_out = 1,
 353     .max_voices_in  = 1,
 354     .voice_size_out = sizeof (SpiceVoiceOut),
 355     .voice_size_in  = sizeof (SpiceVoiceIn),
 356 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 357     .ctl_caps       = VOICE_VOLUME_CAP
 358 #endif
 359 };
 360
 361 void qemu_spice_audio_init (void)
 362 {
 363     spice_audio_driver.can_be_default = 1;
 364 }
 365
 366 static void register_audio_spice(void)
 367 {
 368     audio_driver_register(&spice_audio_driver);
 369 }
 370 type_init(register_audio_spice);