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 "qapi/error.h"
  26 #include "ui/qemu-spice.h"
  27
  28 #define AUDIO_CAP "spice"
  29 #include "audio.h"
  30 #include "audio_int.h"
  31
  32 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  33 #define LINE_OUT_SAMPLES (480 * 4)
  34 #else
  35 #define LINE_OUT_SAMPLES (256 * 4)
  36 #endif
  37
  38 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
  39 #define LINE_IN_SAMPLES (480 * 4)
  40 #else
  41 #define LINE_IN_SAMPLES (256 * 4)
  42 #endif
  43
  44 typedef struct SpiceVoiceOut {
  45     HWVoiceOut            hw;
  46     SpicePlaybackInstance sin;
  47     RateCtl               rate;
  48     int                   active;
  49     uint32_t              *frame;
  50     uint32_t              fpos;
  51     uint32_t              fsize;
  52 } SpiceVoiceOut;
  53
  54 typedef struct SpiceVoiceIn {
  55     HWVoiceIn             hw;
  56     SpiceRecordInstance   sin;
  57     RateCtl               rate;
  58     int                   active;
  59 } SpiceVoiceIn;
  60
  61 static const SpicePlaybackInterface playback_sif = {
  62     .base.type          = SPICE_INTERFACE_PLAYBACK,
  63     .base.description   = "playback",
  64     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
  65     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
  66 };
  67
  68 static const SpiceRecordInterface record_sif = {
  69     .base.type          = SPICE_INTERFACE_RECORD,
  70     .base.description   = "record",
  71     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
  72     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
  73 };
  74
  75 static void *spice_audio_init(Audiodev *dev, Error **errp)
  76 {
  77     if (!using_spice) {
  78         error_setg(errp, "Cannot use spice audio without -spice");
  79         return NULL;
  80     }
  81
  82     return &spice_audio_init;
  83 }
  84
  85 static void spice_audio_fini (void *opaque)
  86 {
  87     /* nothing */
  88 }
  89
  90 /* playback */
  91
  92 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
  93                          void *drv_opaque)
  94 {
  95     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
  96     struct audsettings settings;
  97
  98 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
  99     settings.freq       = spice_server_get_best_playback_rate(NULL);
 100 #else
 101     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
 102 #endif
 103     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
 104     settings.fmt        = AUDIO_FORMAT_S16;
 105     settings.endianness = AUDIO_HOST_ENDIANNESS;
 106
 107     audio_pcm_init_info (&hw->info, &settings);
 108     hw->samples = LINE_OUT_SAMPLES;
 109     out->active = 0;
 110
 111     out->sin.base.sif = &playback_sif.base;
 112     qemu_spice.add_interface(&out->sin.base);
 113 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
 114     spice_server_set_playback_rate(&out->sin, settings.freq);
 115 #endif
 116     return 0;
 117 }
 118
 119 static void line_out_fini (HWVoiceOut *hw)
 120 {
 121     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 122
 123     spice_server_remove_interface (&out->sin.base);
 124 }
 125
 126 static size_t line_out_get_free(HWVoiceOut *hw)
 127 {
 128     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 129
 130     return audio_rate_peek_bytes(&out->rate, &hw->info);
 131 }
 132
 133 static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size)
 134 {
 135     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 136
 137     if (!out->frame) {
 138         spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize);
 139         out->fpos = 0;
 140     }
 141
 142     if (out->frame) {
 143         *size = MIN((out->fsize - out->fpos) << 2, *size);
 144     }
 145
 146     return out->frame + out->fpos;
 147 }
 148
 149 static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size)
 150 {
 151     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 152
 153     audio_rate_add_bytes(&out->rate, size);
 154
 155     if (buf) {
 156         assert(buf == out->frame + out->fpos && out->fpos <= out->fsize);
 157         out->fpos += size >> 2;
 158
 159         if (out->fpos == out->fsize) { /* buffer full */
 160             spice_server_playback_put_samples(&out->sin, out->frame);
 161             out->frame = NULL;
 162         }
 163     }
 164
 165     return size;
 166 }
 167
 168 static void line_out_enable(HWVoiceOut *hw, bool enable)
 169 {
 170     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 171
 172     if (enable) {
 173         if (out->active) {
 174             return;
 175         }
 176         out->active = 1;
 177         audio_rate_start(&out->rate);
 178         spice_server_playback_start (&out->sin);
 179     } else {
 180         if (!out->active) {
 181             return;
 182         }
 183         out->active = 0;
 184         if (out->frame) {
 185             memset(out->frame + out->fpos, 0, (out->fsize - out->fpos) << 2);
 186             spice_server_playback_put_samples (&out->sin, out->frame);
 187             out->frame = NULL;
 188         }
 189         spice_server_playback_stop (&out->sin);
 190     }
 191 }
 192
 193 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 194 static void line_out_volume(HWVoiceOut *hw, Volume *vol)
 195 {
 196     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 197     uint16_t svol[2];
 198
 199     assert(vol->channels == 2);
 200     svol[0] = vol->vol[0] * 257;
 201     svol[1] = vol->vol[1] * 257;
 202     spice_server_playback_set_volume(&out->sin, 2, svol);
 203     spice_server_playback_set_mute(&out->sin, vol->mute);
 204 }
 205 #endif
 206
 207 /* record */
 208
 209 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 210 {
 211     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 212     struct audsettings settings;
 213
 214 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 215     settings.freq       = spice_server_get_best_record_rate(NULL);
 216 #else
 217     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 218 #endif
 219     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 220     settings.fmt        = AUDIO_FORMAT_S16;
 221     settings.endianness = AUDIO_HOST_ENDIANNESS;
 222
 223     audio_pcm_init_info (&hw->info, &settings);
 224     hw->samples = LINE_IN_SAMPLES;
 225     in->active = 0;
 226
 227     in->sin.base.sif = &record_sif.base;
 228     qemu_spice.add_interface(&in->sin.base);
 229 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 230     spice_server_set_record_rate(&in->sin, settings.freq);
 231 #endif
 232     return 0;
 233 }
 234
 235 static void line_in_fini (HWVoiceIn *hw)
 236 {
 237     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 238
 239     spice_server_remove_interface (&in->sin.base);
 240 }
 241
 242 static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len)
 243 {
 244     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 245     uint64_t to_read = audio_rate_get_bytes(&in->rate, &hw->info, len) >> 2;
 246     size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read);
 247
 248     /*
 249      * If the client didn't send new frames, it most likely disconnected.
 250      * Generate silence in this case to avoid a stalled audio stream.
 251      */
 252     if (ready == 0) {
 253         memset(buf, 0, to_read << 2);
 254         ready = to_read;
 255     }
 256
 257     return ready << 2;
 258 }
 259
 260 static void line_in_enable(HWVoiceIn *hw, bool enable)
 261 {
 262     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 263
 264     if (enable) {
 265         if (in->active) {
 266             return;
 267         }
 268         in->active = 1;
 269         audio_rate_start(&in->rate);
 270         spice_server_record_start (&in->sin);
 271     } else {
 272         if (!in->active) {
 273             return;
 274         }
 275         in->active = 0;
 276         spice_server_record_stop (&in->sin);
 277     }
 278 }
 279
 280 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 281 static void line_in_volume(HWVoiceIn *hw, Volume *vol)
 282 {
 283     SpiceVoiceIn *in = container_of(hw, SpiceVoiceIn, hw);
 284     uint16_t svol[2];
 285
 286     assert(vol->channels == 2);
 287     svol[0] = vol->vol[0] * 257;
 288     svol[1] = vol->vol[1] * 257;
 289     spice_server_record_set_volume(&in->sin, 2, svol);
 290     spice_server_record_set_mute(&in->sin, vol->mute);
 291 }
 292 #endif
 293
 294 static struct audio_pcm_ops audio_callbacks = {
 295     .init_out = line_out_init,
 296     .fini_out = line_out_fini,
 297     .write    = audio_generic_write,
 298     .buffer_get_free = line_out_get_free,
 299     .get_buffer_out = line_out_get_buffer,
 300     .put_buffer_out = line_out_put_buffer,
 301     .enable_out = line_out_enable,
 302 #if (SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && \
 303         (SPICE_INTERFACE_PLAYBACK_MINOR >= 2)
 304     .volume_out = line_out_volume,
 305 #endif
 306
 307     .init_in  = line_in_init,
 308     .fini_in  = line_in_fini,
 309     .read     = line_in_read,
 310     .run_buffer_in = audio_generic_run_buffer_in,
 311     .enable_in = line_in_enable,
 312 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 313     .volume_in = line_in_volume,
 314 #endif
 315 };
 316
 317 static struct audio_driver spice_audio_driver = {
 318     .name           = "spice",
 319     .descr          = "spice audio driver",
 320     .init           = spice_audio_init,
 321     .fini           = spice_audio_fini,
 322     .pcm_ops        = &audio_callbacks,
 323     .max_voices_out = 1,
 324     .max_voices_in  = 1,
 325     .voice_size_out = sizeof (SpiceVoiceOut),
 326     .voice_size_in  = sizeof (SpiceVoiceIn),
 327 };
 328
 329 static void register_audio_spice(void)
 330 {
 331     audio_driver_register(&spice_audio_driver);
 332 }
 333 type_init(register_audio_spice);
 334
 335 module_dep("ui-spice-core");