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 "hw/hw.h" 21 #include "qemu-timer.h" 22 #include "ui/qemu-spice.h" 23 24 #define AUDIO_CAP "spice" 25 #include "audio.h" 26 #include "audio_int.h" 27 28 #define LINE_IN_SAMPLES 1024 29 #define LINE_OUT_SAMPLES 1024 30 31 typedef struct SpiceRateCtl { 32 int64_t start_ticks; 33 int64_t bytes_sent; 34 } SpiceRateCtl; 35 36 typedef struct SpiceVoiceOut { 37 HWVoiceOut hw; 38 SpicePlaybackInstance sin; 39 SpiceRateCtl rate; 40 int active; 41 uint32_t *frame; 42 uint32_t *fpos; 43 uint32_t fsize; 44 } SpiceVoiceOut; 45 46 typedef struct SpiceVoiceIn { 47 HWVoiceIn hw; 48 SpiceRecordInstance sin; 49 SpiceRateCtl rate; 50 int active; 51 uint32_t samples[LINE_IN_SAMPLES]; 52 } SpiceVoiceIn; 53 54 static const SpicePlaybackInterface playback_sif = { 55 .base.type = SPICE_INTERFACE_PLAYBACK, 56 .base.description = "playback", 57 .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR, 58 .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR, 59 }; 60 61 static const SpiceRecordInterface record_sif = { 62 .base.type = SPICE_INTERFACE_RECORD, 63 .base.description = "record", 64 .base.major_version = SPICE_INTERFACE_RECORD_MAJOR, 65 .base.minor_version = SPICE_INTERFACE_RECORD_MINOR, 66 }; 67 68 static void *spice_audio_init (void) 69 { 70 if (!using_spice) { 71 return NULL; 72 } 73 return &spice_audio_init; 74 } 75 76 static void spice_audio_fini (void *opaque) 77 { 78 /* nothing */ 79 } 80 81 static void rate_start (SpiceRateCtl *rate) 82 { 83 memset (rate, 0, sizeof (*rate)); 84 rate->start_ticks = qemu_get_clock_ns (vm_clock); 85 } 86 87 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate) 88 { 89 int64_t now; 90 int64_t ticks; 91 int64_t bytes; 92 int64_t samples; 93 94 now = qemu_get_clock_ns (vm_clock); 95 ticks = now - rate->start_ticks; 96 bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ()); 97 samples = (bytes - rate->bytes_sent) >> info->shift; 98 if (samples < 0 || samples > 65536) { 99 fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", samples); 100 rate_start (rate); 101 samples = 0; 102 } 103 rate->bytes_sent += samples << info->shift; 104 return samples; 105 } 106 107 /* playback */ 108 109 static int line_out_init (HWVoiceOut *hw, struct audsettings *as) 110 { 111 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); 112 struct audsettings settings; 113 114 settings.freq = SPICE_INTERFACE_PLAYBACK_FREQ; 115 settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN; 116 settings.fmt = AUD_FMT_S16; 117 settings.endianness = AUDIO_HOST_ENDIANNESS; 118 119 audio_pcm_init_info (&hw->info, &settings); 120 hw->samples = LINE_OUT_SAMPLES; 121 out->active = 0; 122 123 out->sin.base.sif = &playback_sif.base; 124 qemu_spice_add_interface (&out->sin.base); 125 return 0; 126 } 127 128 static void line_out_fini (HWVoiceOut *hw) 129 { 130 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); 131 132 spice_server_remove_interface (&out->sin.base); 133 } 134 135 static int line_out_run (HWVoiceOut *hw, int live) 136 { 137 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); 138 int rpos, decr; 139 int samples; 140 141 if (!live) { 142 return 0; 143 } 144 145 decr = rate_get_samples (&hw->info, &out->rate); 146 decr = audio_MIN (live, decr); 147 148 samples = decr; 149 rpos = hw->rpos; 150 while (samples) { 151 int left_till_end_samples = hw->samples - rpos; 152 int len = audio_MIN (samples, left_till_end_samples); 153 154 if (!out->frame) { 155 spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize); 156 out->fpos = out->frame; 157 } 158 if (out->frame) { 159 len = audio_MIN (len, out->fsize); 160 hw->clip (out->fpos, hw->mix_buf + rpos, len); 161 out->fsize -= len; 162 out->fpos += len; 163 if (out->fsize == 0) { 164 spice_server_playback_put_samples (&out->sin, out->frame); 165 out->frame = out->fpos = NULL; 166 } 167 } 168 rpos = (rpos + len) % hw->samples; 169 samples -= len; 170 } 171 hw->rpos = rpos; 172 return decr; 173 } 174 175 static int line_out_write (SWVoiceOut *sw, void *buf, int len) 176 { 177 return audio_pcm_sw_write (sw, buf, len); 178 } 179 180 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...) 181 { 182 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); 183 184 switch (cmd) { 185 case VOICE_ENABLE: 186 if (out->active) { 187 break; 188 } 189 out->active = 1; 190 rate_start (&out->rate); 191 spice_server_playback_start (&out->sin); 192 break; 193 case VOICE_DISABLE: 194 if (!out->active) { 195 break; 196 } 197 out->active = 0; 198 if (out->frame) { 199 memset (out->fpos, 0, out->fsize << 2); 200 spice_server_playback_put_samples (&out->sin, out->frame); 201 out->frame = out->fpos = NULL; 202 } 203 spice_server_playback_stop (&out->sin); 204 break; 205 } 206 return 0; 207 } 208 209 /* record */ 210 211 static int line_in_init (HWVoiceIn *hw, struct audsettings *as) 212 { 213 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); 214 struct audsettings settings; 215 216 settings.freq = SPICE_INTERFACE_RECORD_FREQ; 217 settings.nchannels = SPICE_INTERFACE_RECORD_CHAN; 218 settings.fmt = AUD_FMT_S16; 219 settings.endianness = AUDIO_HOST_ENDIANNESS; 220 221 audio_pcm_init_info (&hw->info, &settings); 222 hw->samples = LINE_IN_SAMPLES; 223 in->active = 0; 224 225 in->sin.base.sif = &record_sif.base; 226 qemu_spice_add_interface (&in->sin.base); 227 return 0; 228 } 229 230 static void line_in_fini (HWVoiceIn *hw) 231 { 232 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); 233 234 spice_server_remove_interface (&in->sin.base); 235 } 236 237 static int line_in_run (HWVoiceIn *hw) 238 { 239 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); 240 int num_samples; 241 int ready; 242 int len[2]; 243 uint64_t delta_samp; 244 const uint32_t *samples; 245 246 if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) { 247 return 0; 248 } 249 250 delta_samp = rate_get_samples (&hw->info, &in->rate); 251 num_samples = audio_MIN (num_samples, delta_samp); 252 253 ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples); 254 samples = in->samples; 255 if (ready == 0) { 256 static const uint32_t silence[LINE_IN_SAMPLES]; 257 samples = silence; 258 ready = LINE_IN_SAMPLES; 259 } 260 261 num_samples = audio_MIN (ready, num_samples); 262 263 if (hw->wpos + num_samples > hw->samples) { 264 len[0] = hw->samples - hw->wpos; 265 len[1] = num_samples - len[0]; 266 } else { 267 len[0] = num_samples; 268 len[1] = 0; 269 } 270 271 hw->conv (hw->conv_buf + hw->wpos, samples, len[0]); 272 273 if (len[1]) { 274 hw->conv (hw->conv_buf, samples + len[0], len[1]); 275 } 276 277 hw->wpos = (hw->wpos + num_samples) % hw->samples; 278 279 return num_samples; 280 } 281 282 static int line_in_read (SWVoiceIn *sw, void *buf, int size) 283 { 284 return audio_pcm_sw_read (sw, buf, size); 285 } 286 287 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...) 288 { 289 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); 290 291 switch (cmd) { 292 case VOICE_ENABLE: 293 if (in->active) { 294 break; 295 } 296 in->active = 1; 297 rate_start (&in->rate); 298 spice_server_record_start (&in->sin); 299 break; 300 case VOICE_DISABLE: 301 if (!in->active) { 302 break; 303 } 304 in->active = 0; 305 spice_server_record_stop (&in->sin); 306 break; 307 } 308 return 0; 309 } 310 311 static struct audio_option audio_options[] = { 312 { /* end of list */ }, 313 }; 314 315 static struct audio_pcm_ops audio_callbacks = { 316 .init_out = line_out_init, 317 .fini_out = line_out_fini, 318 .run_out = line_out_run, 319 .write = line_out_write, 320 .ctl_out = line_out_ctl, 321 322 .init_in = line_in_init, 323 .fini_in = line_in_fini, 324 .run_in = line_in_run, 325 .read = line_in_read, 326 .ctl_in = line_in_ctl, 327 }; 328 329 struct audio_driver spice_audio_driver = { 330 .name = "spice", 331 .descr = "spice audio driver", 332 .options = audio_options, 333 .init = spice_audio_init, 334 .fini = spice_audio_fini, 335 .pcm_ops = &audio_callbacks, 336 .max_voices_out = 1, 337 .max_voices_in = 1, 338 .voice_size_out = sizeof (SpiceVoiceOut), 339 .voice_size_in = sizeof (SpiceVoiceIn), 340 }; 341 342 void qemu_spice_audio_init (void) 343 { 344 spice_audio_driver.can_be_default = 1; 345 } 346