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