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 SpiceVoiceOut {
  44     HWVoiceOut            hw;
  45     SpicePlaybackInstance sin;
  46     RateCtl               rate;
  47     int                   active;
  48     uint32_t              *frame;
  49     uint32_t              fpos;
  50     uint32_t              fsize;
  51 } SpiceVoiceOut;
  52
  53 typedef struct SpiceVoiceIn {
  54     HWVoiceIn             hw;
  55     SpiceRecordInstance   sin;
  56     RateCtl               rate;
  57     int                   active;
  58 } SpiceVoiceIn;
  59
  60 static const SpicePlaybackInterface playback_sif = {
  61     .base.type          = SPICE_INTERFACE_PLAYBACK,
  62     .base.description   = "playback",
  63     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  64     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  65 };
  66
  67 static const SpiceRecordInterface record_sif = {
  68     .base.type          = SPICE_INTERFACE_RECORD,
  69     .base.description   = "record",
  70     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  71     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  72 };
  73
  74 static void *spice_audio_init(Audiodev *dev)
  75 {
  76     if (!using_spice) {
  77         return NULL;
  78     }
  79     return &spice_audio_init;
  80 }
  81
  82 static void spice_audio_fini (void *opaque)
  83 {
  84     /* nothing */
  85 }
  86
  87 /* playback */
  88
  89 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
  90                          void *drv_opaque)
  91 {
  92     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
  93     struct audsettings settings;
  94
  95 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  96     settings.freq       = spice_server_get_best_playback_rate(NULL);
  97 #else
  98     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
  99 #endif
 100     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 101     settings.fmt        = AUDIO_FORMAT_S16;
 102     settings.endianness = AUDIO_HOST_ENDIANNESS;
 103
 104     audio_pcm_init_info (&hw->info, &settings);
 105     hw->samples = LINE_OUT_SAMPLES;
 106     out->active = 0;
 107
 108     out->sin.base.sif = &playback_sif.base;
 109     qemu_spice.add_interface(&out->sin.base);
 110 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 111     spice_server_set_playback_rate(&out->sin, settings.freq);
 112 #endif
 113     return 0;
 114 }
 115
 116 static void line_out_fini (HWVoiceOut *hw)
 117 {
 118     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 119
 120     spice_server_remove_interface (&out->sin.base);
 121 }
 122
 123 static size_t line_out_get_free(HWVoiceOut *hw)
 124 {
 125     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 126
 127     return audio_rate_peek_bytes(&out->rate, &hw->info);
 128 }
 129
 130 static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size)
 131 {
 132     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 133
 134     if (!out->frame) {
 135         spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize);
 136         out->fpos = 0;
 137     }
 138
 139     if (out->frame) {
 140         *size = MIN((out->fsize - out->fpos) << 2, *size);
 141     }
 142
 143     return out->frame + out->fpos;
 144 }
 145
 146 static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size)
 147 {
 148     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 149
 150     audio_rate_add_bytes(&out->rate, size);
 151
 152     if (buf) {
 153         assert(buf == out->frame + out->fpos && out->fpos <= out->fsize);
 154         out->fpos += size >> 2;
 155
 156         if (out->fpos == out->fsize) { /* buffer full */
 157             spice_server_playback_put_samples(&out->sin, out->frame);
 158             out->frame = NULL;
 159         }
 160     }
 161
 162     return size;
 163 }
 164
 165 static void line_out_enable(HWVoiceOut *hw, bool enable)
 166 {
 167     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 168
 169     if (enable) {
 170         if (out->active) {
 171             return;
 172         }
 173         out->active = 1;
 174         audio_rate_start(&out->rate);
 175         spice_server_playback_start (&out->sin);
 176     } else {
 177         if (!out->active) {
 178             return;
 179         }
 180         out->active = 0;
 181         if (out->frame) {
 182             memset(out->frame + out->fpos, 0, (out->fsize - out->fpos) << 2);
 183             spice_server_playback_put_samples (&out->sin, out->frame);
 184             out->frame = NULL;
 185         }
 186         spice_server_playback_stop (&out->sin);
 187     }
 188 }
 189
 190 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 191 static void line_out_volume(HWVoiceOut *hw, Volume *vol)
 192 {
 193     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 194     uint16_t svol[2];
 195
 196     assert(vol->channels == 2);
 197     svol[0] = vol->vol[0] * 257;
 198     svol[1] = vol->vol[1] * 257;
 199     spice_server_playback_set_volume(&out->sin, 2, svol);
 200     spice_server_playback_set_mute(&out->sin, vol->mute);
 201 }
 202 #endif
 203
 204 /* record */
 205
 206 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 207 {
 208     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 209     struct audsettings settings;
 210
 211 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 212     settings.freq       = spice_server_get_best_record_rate(NULL);
 213 #else
 214     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 215 #endif
 216     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 217     settings.fmt        = AUDIO_FORMAT_S16;
 218     settings.endianness = AUDIO_HOST_ENDIANNESS;
 219
 220     audio_pcm_init_info (&hw->info, &settings);
 221     hw->samples = LINE_IN_SAMPLES;
 222     in->active = 0;
 223
 224     in->sin.base.sif = &record_sif.base;
 225     qemu_spice.add_interface(&in->sin.base);
 226 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 227     spice_server_set_record_rate(&in->sin, settings.freq);
 228 #endif
 229     return 0;
 230 }
 231
 232 static void line_in_fini (HWVoiceIn *hw)
 233 {
 234     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 235
 236     spice_server_remove_interface (&in->sin.base);
 237 }
 238
 239 static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len)
 240 {
 241     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 242     uint64_t to_read = audio_rate_get_bytes(&in->rate, &hw->info, len) >> 2;
 243     size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read);
 244
 245     /*
 246      * If the client didn't send new frames, it most likely disconnected.
 247      * Generate silence in this case to avoid a stalled audio stream.
 248      */
 249     if (ready == 0) {
 250         memset(buf, 0, to_read << 2);
 251         ready = to_read;
 252     }
 253
 254     return ready << 2;
 255 }
 256
 257 static void line_in_enable(HWVoiceIn *hw, bool enable)
 258 {
 259     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 260
 261     if (enable) {
 262         if (in->active) {
 263             return;
 264         }
 265         in->active = 1;
 266         audio_rate_start(&in->rate);
 267         spice_server_record_start (&in->sin);
 268     } else {
 269         if (!in->active) {
 270             return;
 271         }
 272         in->active = 0;
 273         spice_server_record_stop (&in->sin);
 274     }
 275 }
 276
 277 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 278 static void line_in_volume(HWVoiceIn *hw, Volume *vol)
 279 {
 280     SpiceVoiceIn *in = container_of(hw, SpiceVoiceIn, hw);
 281     uint16_t svol[2];
 282
 283     assert(vol->channels == 2);
 284     svol[0] = vol->vol[0] * 257;
 285     svol[1] = vol->vol[1] * 257;
 286     spice_server_record_set_volume(&in->sin, 2, svol);
 287     spice_server_record_set_mute(&in->sin, vol->mute);
 288 }
 289 #endif
 290
 291 static struct audio_pcm_ops audio_callbacks = {
 292     .init_out = line_out_init,
 293     .fini_out = line_out_fini,
 294     .write    = audio_generic_write,
 295     .buffer_get_free = line_out_get_free,
 296     .get_buffer_out = line_out_get_buffer,
 297     .put_buffer_out = line_out_put_buffer,
 298     .enable_out = line_out_enable,
 299 #if (SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && \
 300         (SPICE_INTERFACE_PLAYBACK_MINOR >= 2)
 301     .volume_out = line_out_volume,
 302 #endif
 303
 304     .init_in  = line_in_init,
 305     .fini_in  = line_in_fini,
 306     .read     = line_in_read,
 307     .run_buffer_in = audio_generic_run_buffer_in,
 308     .enable_in = line_in_enable,
 309 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 310     .volume_in = line_in_volume,
 311 #endif
 312 };
 313
 314 static struct audio_driver spice_audio_driver = {
 315     .name           = "spice",
 316     .descr          = "spice audio driver",
 317     .init           = spice_audio_init,
 318     .fini           = spice_audio_fini,
 319     .pcm_ops        = &audio_callbacks,
 320     .max_voices_out = 1,
 321     .max_voices_in  = 1,
 322     .voice_size_out = sizeof (SpiceVoiceOut),
 323     .voice_size_in  = sizeof (SpiceVoiceIn),
 324 };
 325
 326 static void register_audio_spice(void)
 327 {
 328     audio_driver_register(&spice_audio_driver);
 329 }
 330 type_init(register_audio_spice);
 331
 332 module_dep("ui-spice-core");