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 void *line_out_get_buffer(HWVoiceOut *hw, size_t *size)
 124 {
 125     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 126
 127     if (!out->frame) {
 128         spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize);
 129         out->fpos = 0;
 130     }
 131
 132     if (out->frame) {
 133         *size = audio_rate_get_bytes(
 134             &hw->info, &out->rate,
 135             (out->fsize - out->fpos) * hw->info.bytes_per_frame);
 136     } else {
 137         audio_rate_start(&out->rate);
 138     }
 139     return out->frame + out->fpos;
 140 }
 141
 142 static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size)
 143 {
 144     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 145
 146     assert(buf == out->frame + out->fpos && out->fpos <= out->fsize);
 147     out->fpos += size >> 2;
 148
 149     if (out->fpos == out->fsize) { /* buffer full */
 150         spice_server_playback_put_samples(&out->sin, out->frame);
 151         out->frame = NULL;
 152     }
 153
 154     return size;
 155 }
 156
 157 static void line_out_enable(HWVoiceOut *hw, bool enable)
 158 {
 159     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
 160
 161     if (enable) {
 162         if (out->active) {
 163             return;
 164         }
 165         out->active = 1;
 166         audio_rate_start(&out->rate);
 167         spice_server_playback_start (&out->sin);
 168     } else {
 169         if (!out->active) {
 170             return;
 171         }
 172         out->active = 0;
 173         if (out->frame) {
 174             memset(out->frame + out->fpos, 0, (out->fsize - out->fpos) << 2);
 175             spice_server_playback_put_samples (&out->sin, out->frame);
 176             out->frame = NULL;
 177         }
 178         spice_server_playback_stop (&out->sin);
 179     }
 180 }
 181
 182 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
 183 static void line_out_volume(HWVoiceOut *hw, Volume *vol)
 184 {
 185     SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
 186     uint16_t svol[2];
 187
 188     assert(vol->channels == 2);
 189     svol[0] = vol->vol[0] * 257;
 190     svol[1] = vol->vol[1] * 257;
 191     spice_server_playback_set_volume(&out->sin, 2, svol);
 192     spice_server_playback_set_mute(&out->sin, vol->mute);
 193 }
 194 #endif
 195
 196 /* record */
 197
 198 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
 199 {
 200     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 201     struct audsettings settings;
 202
 203 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 204     settings.freq       = spice_server_get_best_record_rate(NULL);
 205 #else
 206     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
 207 #endif
 208     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
 209     settings.fmt        = AUDIO_FORMAT_S16;
 210     settings.endianness = AUDIO_HOST_ENDIANNESS;
 211
 212     audio_pcm_init_info (&hw->info, &settings);
 213     hw->samples = LINE_IN_SAMPLES;
 214     in->active = 0;
 215
 216     in->sin.base.sif = &record_sif.base;
 217     qemu_spice_add_interface (&in->sin.base);
 218 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
 219     spice_server_set_record_rate(&in->sin, settings.freq);
 220 #endif
 221     return 0;
 222 }
 223
 224 static void line_in_fini (HWVoiceIn *hw)
 225 {
 226     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 227
 228     spice_server_remove_interface (&in->sin.base);
 229 }
 230
 231 static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len)
 232 {
 233     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 234     uint64_t to_read = audio_rate_get_bytes(&hw->info, &in->rate, len) >> 2;
 235     size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read);
 236
 237     /* XXX: do we need this? */
 238     if (ready == 0) {
 239         memset(buf, 0, to_read << 2);
 240         ready = to_read;
 241     }
 242
 243     return ready << 2;
 244 }
 245
 246 static void line_in_enable(HWVoiceIn *hw, bool enable)
 247 {
 248     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
 249
 250     if (enable) {
 251         if (in->active) {
 252             return;
 253         }
 254         in->active = 1;
 255         audio_rate_start(&in->rate);
 256         spice_server_record_start (&in->sin);
 257     } else {
 258         if (!in->active) {
 259             return;
 260         }
 261         in->active = 0;
 262         spice_server_record_stop (&in->sin);
 263     }
 264 }
 265
 266 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 267 static void line_in_volume(HWVoiceIn *hw, Volume *vol)
 268 {
 269     SpiceVoiceIn *in = container_of(hw, SpiceVoiceIn, hw);
 270     uint16_t svol[2];
 271
 272     assert(vol->channels == 2);
 273     svol[0] = vol->vol[0] * 257;
 274     svol[1] = vol->vol[1] * 257;
 275     spice_server_record_set_volume(&in->sin, 2, svol);
 276     spice_server_record_set_mute(&in->sin, vol->mute);
 277 }
 278 #endif
 279
 280 static struct audio_pcm_ops audio_callbacks = {
 281     .init_out = line_out_init,
 282     .fini_out = line_out_fini,
 283     .write    = audio_generic_write,
 284     .get_buffer_out = line_out_get_buffer,
 285     .put_buffer_out = line_out_put_buffer,
 286     .enable_out = line_out_enable,
 287 #if (SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && \
 288         (SPICE_INTERFACE_PLAYBACK_MINOR >= 2)
 289     .volume_out = line_out_volume,
 290 #endif
 291
 292     .init_in  = line_in_init,
 293     .fini_in  = line_in_fini,
 294     .read     = line_in_read,
 295     .enable_in = line_in_enable,
 296 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
 297     .volume_in = line_in_volume,
 298 #endif
 299 };
 300
 301 static struct audio_driver spice_audio_driver = {
 302     .name           = "spice",
 303     .descr          = "spice audio driver",
 304     .init           = spice_audio_init,
 305     .fini           = spice_audio_fini,
 306     .pcm_ops        = &audio_callbacks,
 307     .max_voices_out = 1,
 308     .max_voices_in  = 1,
 309     .voice_size_out = sizeof (SpiceVoiceOut),
 310     .voice_size_in  = sizeof (SpiceVoiceIn),
 311 };
 312
 313 void qemu_spice_audio_init (void)
 314 {
 315     spice_audio_driver.can_be_default = 1;
 316 }
 317
 318 static void register_audio_spice(void)
 319 {
 320     audio_driver_register(&spice_audio_driver);
 321 }
 322 type_init(register_audio_spice);