| 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 | #include "qom/object.h" |
| 28 | |
| 29 | #include "qemu/audio.h" |
| 30 | #include "audio_int.h" |
| 31 | |
| 32 | #define TYPE_AUDIO_SPICE "audio-spice" |
| 33 | OBJECT_DECLARE_SIMPLE_TYPE(AudioSpice, AUDIO_SPICE) |
| 34 | |
| 35 | static AudioBackendClass *audio_spice_parent_class; |
| 36 | |
| 37 | struct AudioSpice { |
| 38 | AudioMixengBackend parent_obj; |
| 39 | }; |
| 40 | |
| 41 | static bool spice_audio_realize(AudioBackend *abe, Audiodev *dev, Error **errp) |
| 42 | { |
| 43 | if (!using_spice) { |
| 44 | error_setg(errp, "Cannot use spice audio without -spice"); |
| 45 | qapi_free_Audiodev(dev); |
| 46 | return false; |
| 47 | } |
| 48 | |
| 49 | return audio_spice_parent_class->realize(abe, dev, errp); |
| 50 | } |
| 51 | |
| 52 | #define LINE_OUT_SAMPLES (480 * 4) |
| 53 | #define LINE_IN_SAMPLES (480 * 4) |
| 54 | |
| 55 | typedef struct SpiceVoiceOut { |
| 56 | HWVoiceOut hw; |
| 57 | SpicePlaybackInstance sin; |
| 58 | RateCtl rate; |
| 59 | int active; |
| 60 | uint32_t *frame; |
| 61 | uint32_t fpos; |
| 62 | uint32_t fsize; |
| 63 | } SpiceVoiceOut; |
| 64 | |
| 65 | typedef struct SpiceVoiceIn { |
| 66 | HWVoiceIn hw; |
| 67 | SpiceRecordInstance sin; |
| 68 | RateCtl rate; |
| 69 | int active; |
| 70 | } SpiceVoiceIn; |
| 71 | |
| 72 | static const SpicePlaybackInterface playback_sif = { |
| 73 | .base.type = SPICE_INTERFACE_PLAYBACK, |
| 74 | .base.description = "playback", |
| 75 | .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR, |
| 76 | .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR, |
| 77 | }; |
| 78 | |
| 79 | static const SpiceRecordInterface record_sif = { |
| 80 | .base.type = SPICE_INTERFACE_RECORD, |
| 81 | .base.description = "record", |
| 82 | .base.major_version = SPICE_INTERFACE_RECORD_MAJOR, |
| 83 | .base.minor_version = SPICE_INTERFACE_RECORD_MINOR, |
| 84 | }; |
| 85 | |
| 86 | /* playback */ |
| 87 | |
| 88 | static int line_out_init(HWVoiceOut *hw, struct audsettings *as) |
| 89 | { |
| 90 | SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); |
| 91 | struct audsettings settings; |
| 92 | |
| 93 | settings.freq = spice_server_get_best_playback_rate(NULL); |
| 94 | settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN; |
| 95 | settings.fmt = AUDIO_FORMAT_S16; |
| 96 | settings.big_endian = HOST_BIG_ENDIAN; |
| 97 | |
| 98 | audio_pcm_init_info (&hw->info, &settings); |
| 99 | hw->samples = LINE_OUT_SAMPLES; |
| 100 | out->active = 0; |
| 101 | |
| 102 | out->sin.base.sif = &playback_sif.base; |
| 103 | qemu_spice.add_interface(&out->sin.base); |
| 104 | spice_server_set_playback_rate(&out->sin, settings.freq); |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | static void line_out_fini (HWVoiceOut *hw) |
| 109 | { |
| 110 | SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); |
| 111 | |
| 112 | spice_server_remove_interface (&out->sin.base); |
| 113 | } |
| 114 | |
| 115 | static size_t line_out_get_free(HWVoiceOut *hw) |
| 116 | { |
| 117 | SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw); |
| 118 | |
| 119 | return audio_rate_peek_bytes(&out->rate, &hw->info); |
| 120 | } |
| 121 | |
| 122 | static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size) |
| 123 | { |
| 124 | SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw); |
| 125 | |
| 126 | if (!out->frame) { |
| 127 | spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize); |
| 128 | out->fpos = 0; |
| 129 | } |
| 130 | |
| 131 | if (out->frame) { |
| 132 | *size = MIN((out->fsize - out->fpos) << 2, *size); |
| 133 | } |
| 134 | |
| 135 | return out->frame + out->fpos; |
| 136 | } |
| 137 | |
| 138 | static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size) |
| 139 | { |
| 140 | SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw); |
| 141 | |
| 142 | audio_rate_add_bytes(&out->rate, size); |
| 143 | |
| 144 | if (buf) { |
| 145 | assert(buf == out->frame + out->fpos && out->fpos <= out->fsize); |
| 146 | out->fpos += size >> 2; |
| 147 | |
| 148 | if (out->fpos == out->fsize) { /* buffer full */ |
| 149 | spice_server_playback_put_samples(&out->sin, out->frame); |
| 150 | out->frame = NULL; |
| 151 | } |
| 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 | static void line_out_volume(HWVoiceOut *hw, Volume *vol) |
| 183 | { |
| 184 | SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw); |
| 185 | uint16_t svol[2]; |
| 186 | |
| 187 | assert(vol->channels == 2); |
| 188 | svol[0] = vol->vol[0] * 257; |
| 189 | svol[1] = vol->vol[1] * 257; |
| 190 | spice_server_playback_set_volume(&out->sin, 2, svol); |
| 191 | spice_server_playback_set_mute(&out->sin, vol->mute); |
| 192 | } |
| 193 | |
| 194 | /* record */ |
| 195 | |
| 196 | static int line_in_init(HWVoiceIn *hw, struct audsettings *as) |
| 197 | { |
| 198 | SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
| 199 | struct audsettings settings; |
| 200 | |
| 201 | settings.freq = spice_server_get_best_record_rate(NULL); |
| 202 | settings.nchannels = SPICE_INTERFACE_RECORD_CHAN; |
| 203 | settings.fmt = AUDIO_FORMAT_S16; |
| 204 | settings.big_endian = HOST_BIG_ENDIAN; |
| 205 | |
| 206 | audio_pcm_init_info (&hw->info, &settings); |
| 207 | hw->samples = LINE_IN_SAMPLES; |
| 208 | in->active = 0; |
| 209 | |
| 210 | in->sin.base.sif = &record_sif.base; |
| 211 | qemu_spice.add_interface(&in->sin.base); |
| 212 | spice_server_set_record_rate(&in->sin, settings.freq); |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static void line_in_fini (HWVoiceIn *hw) |
| 217 | { |
| 218 | SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
| 219 | |
| 220 | spice_server_remove_interface (&in->sin.base); |
| 221 | } |
| 222 | |
| 223 | static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len) |
| 224 | { |
| 225 | SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
| 226 | uint64_t to_read = audio_rate_get_bytes(&in->rate, &hw->info, len) >> 2; |
| 227 | size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read); |
| 228 | |
| 229 | /* |
| 230 | * If the client didn't send new frames, it most likely disconnected. |
| 231 | * Generate silence in this case to avoid a stalled audio stream. |
| 232 | */ |
| 233 | if (ready == 0) { |
| 234 | memset(buf, 0, to_read << 2); |
| 235 | ready = to_read; |
| 236 | } |
| 237 | |
| 238 | return ready << 2; |
| 239 | } |
| 240 | |
| 241 | static void line_in_enable(HWVoiceIn *hw, bool enable) |
| 242 | { |
| 243 | SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
| 244 | |
| 245 | if (enable) { |
| 246 | if (in->active) { |
| 247 | return; |
| 248 | } |
| 249 | in->active = 1; |
| 250 | audio_rate_start(&in->rate); |
| 251 | spice_server_record_start (&in->sin); |
| 252 | } else { |
| 253 | if (!in->active) { |
| 254 | return; |
| 255 | } |
| 256 | in->active = 0; |
| 257 | spice_server_record_stop (&in->sin); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | static void line_in_volume(HWVoiceIn *hw, Volume *vol) |
| 262 | { |
| 263 | SpiceVoiceIn *in = container_of(hw, SpiceVoiceIn, hw); |
| 264 | uint16_t svol[2]; |
| 265 | |
| 266 | assert(vol->channels == 2); |
| 267 | svol[0] = vol->vol[0] * 257; |
| 268 | svol[1] = vol->vol[1] * 257; |
| 269 | spice_server_record_set_volume(&in->sin, 2, svol); |
| 270 | spice_server_record_set_mute(&in->sin, vol->mute); |
| 271 | } |
| 272 | |
| 273 | static void audio_spice_class_init(ObjectClass *klass, const void *data) |
| 274 | { |
| 275 | AudioBackendClass *b = AUDIO_BACKEND_CLASS(klass); |
| 276 | AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_CLASS(klass); |
| 277 | |
| 278 | audio_spice_parent_class = AUDIO_BACKEND_CLASS(object_class_get_parent(klass)); |
| 279 | |
| 280 | b->realize = spice_audio_realize; |
| 281 | k->max_voices_out = 1; |
| 282 | k->max_voices_in = 1; |
| 283 | k->voice_size_out = sizeof(SpiceVoiceOut); |
| 284 | k->voice_size_in = sizeof(SpiceVoiceIn); |
| 285 | |
| 286 | k->init_out = line_out_init; |
| 287 | k->fini_out = line_out_fini; |
| 288 | k->write = audio_generic_write; |
| 289 | k->buffer_get_free = line_out_get_free; |
| 290 | k->get_buffer_out = line_out_get_buffer; |
| 291 | k->put_buffer_out = line_out_put_buffer; |
| 292 | k->enable_out = line_out_enable; |
| 293 | k->volume_out = line_out_volume; |
| 294 | |
| 295 | k->init_in = line_in_init; |
| 296 | k->fini_in = line_in_fini; |
| 297 | k->read = line_in_read; |
| 298 | k->run_buffer_in = audio_generic_run_buffer_in; |
| 299 | k->enable_in = line_in_enable; |
| 300 | k->volume_in = line_in_volume; |
| 301 | } |
| 302 | |
| 303 | static const TypeInfo audio_types[] = { |
| 304 | { |
| 305 | .name = TYPE_AUDIO_SPICE, |
| 306 | .parent = TYPE_AUDIO_MIXENG_BACKEND, |
| 307 | .instance_size = sizeof(AudioSpice), |
| 308 | .class_init = audio_spice_class_init, |
| 309 | }, |
| 310 | }; |
| 311 | |
| 312 | DEFINE_TYPES(audio_types) |
| 313 | module_obj(TYPE_AUDIO_SPICE); |
| 314 | |
| 315 | module_dep("ui-spice-core"); |