Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 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, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjmedia/sound_port.h> |
| 21 | #include <pjmedia/alaw_ulaw.h> |
| 22 | #include <pjmedia/delaybuf.h> |
| 23 | #include <pjmedia/echo.h> |
| 24 | #include <pjmedia/errno.h> |
| 25 | #include <pj/assert.h> |
| 26 | #include <pj/log.h> |
| 27 | #include <pj/rand.h> |
| 28 | #include <pj/string.h> /* pj_memset() */ |
| 29 | |
| 30 | #define AEC_TAIL 128 /* default AEC length in ms */ |
| 31 | #define AEC_SUSPEND_LIMIT 5 /* seconds of no activity */ |
| 32 | |
| 33 | #define THIS_FILE "sound_port.c" |
| 34 | |
| 35 | //#define TEST_OVERFLOW_UNDERFLOW |
| 36 | |
| 37 | struct pjmedia_snd_port |
| 38 | { |
| 39 | int rec_id; |
| 40 | int play_id; |
| 41 | pj_uint32_t aud_caps; |
| 42 | pjmedia_aud_param aud_param; |
| 43 | pjmedia_aud_stream *aud_stream; |
| 44 | pjmedia_dir dir; |
| 45 | pjmedia_port *port; |
| 46 | |
| 47 | pjmedia_clock_src cap_clocksrc, |
| 48 | play_clocksrc; |
| 49 | |
| 50 | unsigned clock_rate; |
| 51 | unsigned channel_count; |
| 52 | unsigned samples_per_frame; |
| 53 | unsigned bits_per_sample; |
| 54 | unsigned options; |
| 55 | unsigned prm_ec_options; |
| 56 | |
| 57 | /* software ec */ |
| 58 | pjmedia_echo_state *ec_state; |
| 59 | unsigned ec_options; |
| 60 | unsigned ec_tail_len; |
| 61 | pj_bool_t ec_suspended; |
| 62 | unsigned ec_suspend_count; |
| 63 | unsigned ec_suspend_limit; |
| 64 | }; |
| 65 | |
| 66 | /* |
| 67 | * The callback called by sound player when it needs more samples to be |
| 68 | * played. |
| 69 | */ |
| 70 | static pj_status_t play_cb(void *user_data, pjmedia_frame *frame) |
| 71 | { |
| 72 | pjmedia_snd_port *snd_port = (pjmedia_snd_port*) user_data; |
| 73 | pjmedia_port *port; |
| 74 | const unsigned required_size = (unsigned)frame->size; |
| 75 | pj_status_t status; |
| 76 | |
| 77 | pjmedia_clock_src_update(&snd_port->play_clocksrc, &frame->timestamp); |
| 78 | |
| 79 | port = snd_port->port; |
| 80 | if (port == NULL) |
| 81 | goto no_frame; |
| 82 | |
| 83 | status = pjmedia_port_get_frame(port, frame); |
| 84 | if (status != PJ_SUCCESS) |
| 85 | goto no_frame; |
| 86 | |
| 87 | if (frame->type != PJMEDIA_FRAME_TYPE_AUDIO) |
| 88 | goto no_frame; |
| 89 | |
| 90 | /* Must supply the required samples */ |
| 91 | pj_assert(frame->size == required_size); |
| 92 | |
| 93 | if (snd_port->ec_state) { |
| 94 | if (snd_port->ec_suspended) { |
| 95 | snd_port->ec_suspended = PJ_FALSE; |
| 96 | //pjmedia_echo_state_reset(snd_port->ec_state); |
| 97 | PJ_LOG(4,(THIS_FILE, "EC activated")); |
| 98 | } |
| 99 | snd_port->ec_suspend_count = 0; |
| 100 | pjmedia_echo_playback(snd_port->ec_state, (pj_int16_t*)frame->buf); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | return PJ_SUCCESS; |
| 105 | |
| 106 | no_frame: |
| 107 | frame->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 108 | frame->size = required_size; |
| 109 | pj_bzero(frame->buf, frame->size); |
| 110 | |
| 111 | if (snd_port->ec_state && !snd_port->ec_suspended) { |
| 112 | ++snd_port->ec_suspend_count; |
| 113 | if (snd_port->ec_suspend_count > snd_port->ec_suspend_limit) { |
| 114 | snd_port->ec_suspended = PJ_TRUE; |
| 115 | PJ_LOG(4,(THIS_FILE, "EC suspended because of inactivity")); |
| 116 | } |
| 117 | if (snd_port->ec_state) { |
| 118 | /* To maintain correct delay in EC */ |
| 119 | pjmedia_echo_playback(snd_port->ec_state, (pj_int16_t*)frame->buf); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | return PJ_SUCCESS; |
| 124 | } |
| 125 | |
| 126 | |
| 127 | /* |
| 128 | * The callback called by sound recorder when it has finished capturing a |
| 129 | * frame. |
| 130 | */ |
| 131 | static pj_status_t rec_cb(void *user_data, pjmedia_frame *frame) |
| 132 | { |
| 133 | pjmedia_snd_port *snd_port = (pjmedia_snd_port*) user_data; |
| 134 | pjmedia_port *port; |
| 135 | |
| 136 | pjmedia_clock_src_update(&snd_port->cap_clocksrc, &frame->timestamp); |
| 137 | |
| 138 | port = snd_port->port; |
| 139 | if (port == NULL) |
| 140 | return PJ_SUCCESS; |
| 141 | |
| 142 | /* Cancel echo */ |
| 143 | if (snd_port->ec_state && !snd_port->ec_suspended) { |
| 144 | pjmedia_echo_capture(snd_port->ec_state, (pj_int16_t*) frame->buf, 0); |
| 145 | } |
| 146 | |
| 147 | pjmedia_port_put_frame(port, frame); |
| 148 | |
| 149 | |
| 150 | return PJ_SUCCESS; |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * The callback called by sound player when it needs more samples to be |
| 155 | * played. This version is for non-PCM data. |
| 156 | */ |
| 157 | static pj_status_t play_cb_ext(void *user_data, pjmedia_frame *frame) |
| 158 | { |
| 159 | pjmedia_snd_port *snd_port = (pjmedia_snd_port*) user_data; |
| 160 | pjmedia_port *port = snd_port->port; |
| 161 | |
| 162 | if (port == NULL) { |
| 163 | frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| 164 | return PJ_SUCCESS; |
| 165 | } |
| 166 | |
| 167 | pjmedia_port_get_frame(port, frame); |
| 168 | |
| 169 | return PJ_SUCCESS; |
| 170 | } |
| 171 | |
| 172 | |
| 173 | /* |
| 174 | * The callback called by sound recorder when it has finished capturing a |
| 175 | * frame. This version is for non-PCM data. |
| 176 | */ |
| 177 | static pj_status_t rec_cb_ext(void *user_data, pjmedia_frame *frame) |
| 178 | { |
| 179 | pjmedia_snd_port *snd_port = (pjmedia_snd_port*) user_data; |
| 180 | pjmedia_port *port; |
| 181 | |
| 182 | port = snd_port->port; |
| 183 | if (port == NULL) |
| 184 | return PJ_SUCCESS; |
| 185 | |
| 186 | pjmedia_port_put_frame(port, frame); |
| 187 | |
| 188 | return PJ_SUCCESS; |
| 189 | } |
| 190 | |
| 191 | /* Initialize with default values (zero) */ |
| 192 | PJ_DEF(void) pjmedia_snd_port_param_default(pjmedia_snd_port_param *prm) |
| 193 | { |
| 194 | pj_bzero(prm, sizeof(*prm)); |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * Start the sound stream. |
| 199 | * This may be called even when the sound stream has already been started. |
| 200 | */ |
| 201 | static pj_status_t start_sound_device( pj_pool_t *pool, |
| 202 | pjmedia_snd_port *snd_port ) |
| 203 | { |
| 204 | pjmedia_aud_rec_cb snd_rec_cb; |
| 205 | pjmedia_aud_play_cb snd_play_cb; |
| 206 | pjmedia_aud_param param_copy; |
| 207 | pj_status_t status; |
| 208 | |
| 209 | /* Check if sound has been started. */ |
| 210 | if (snd_port->aud_stream != NULL) |
| 211 | return PJ_SUCCESS; |
| 212 | |
| 213 | PJ_ASSERT_RETURN(snd_port->dir == PJMEDIA_DIR_CAPTURE || |
| 214 | snd_port->dir == PJMEDIA_DIR_PLAYBACK || |
| 215 | snd_port->dir == PJMEDIA_DIR_CAPTURE_PLAYBACK, |
| 216 | PJ_EBUG); |
| 217 | |
| 218 | /* Get device caps */ |
| 219 | if (snd_port->aud_param.dir & PJMEDIA_DIR_CAPTURE) { |
| 220 | pjmedia_aud_dev_info dev_info; |
| 221 | |
| 222 | status = pjmedia_aud_dev_get_info(snd_port->aud_param.rec_id, |
| 223 | &dev_info); |
| 224 | if (status != PJ_SUCCESS) |
| 225 | return status; |
| 226 | |
| 227 | snd_port->aud_caps = dev_info.caps; |
| 228 | } else { |
| 229 | snd_port->aud_caps = 0; |
| 230 | } |
| 231 | |
| 232 | /* Process EC settings */ |
| 233 | pj_memcpy(¶m_copy, &snd_port->aud_param, sizeof(param_copy)); |
| 234 | if (param_copy.flags & PJMEDIA_AUD_DEV_CAP_EC) { |
| 235 | /* EC is wanted */ |
| 236 | if ((snd_port->prm_ec_options & PJMEDIA_ECHO_USE_SW_ECHO) == 0 && |
| 237 | (snd_port->aud_caps & PJMEDIA_AUD_DEV_CAP_EC)) |
| 238 | { |
| 239 | /* Device supports EC */ |
| 240 | /* Nothing to do */ |
| 241 | } else { |
| 242 | /* Application wants to use software EC or device |
| 243 | * doesn't support EC, remove EC settings from |
| 244 | * device parameters |
| 245 | */ |
| 246 | param_copy.flags &= ~(PJMEDIA_AUD_DEV_CAP_EC | |
| 247 | PJMEDIA_AUD_DEV_CAP_EC_TAIL); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /* Use different callback if format is not PCM */ |
| 252 | if (snd_port->aud_param.ext_fmt.id == PJMEDIA_FORMAT_L16) { |
| 253 | snd_rec_cb = &rec_cb; |
| 254 | snd_play_cb = &play_cb; |
| 255 | } else { |
| 256 | snd_rec_cb = &rec_cb_ext; |
| 257 | snd_play_cb = &play_cb_ext; |
| 258 | } |
| 259 | |
| 260 | /* Open the device */ |
| 261 | status = pjmedia_aud_stream_create(¶m_copy, |
| 262 | snd_rec_cb, |
| 263 | snd_play_cb, |
| 264 | snd_port, |
| 265 | &snd_port->aud_stream); |
| 266 | |
| 267 | if (status != PJ_SUCCESS) |
| 268 | return status; |
| 269 | |
| 270 | /* Inactivity limit before EC is suspended. */ |
| 271 | snd_port->ec_suspend_limit = AEC_SUSPEND_LIMIT * |
| 272 | (snd_port->clock_rate / |
| 273 | snd_port->samples_per_frame); |
| 274 | |
| 275 | /* Create software EC if parameter specifies EC and |
| 276 | * (app specifically requests software EC or device |
| 277 | * doesn't support EC). Only do this if the format is PCM! |
| 278 | */ |
| 279 | if ((snd_port->aud_param.flags & PJMEDIA_AUD_DEV_CAP_EC) && |
| 280 | ((snd_port->aud_caps & PJMEDIA_AUD_DEV_CAP_EC)==0 || |
| 281 | (snd_port->prm_ec_options & PJMEDIA_ECHO_USE_SW_ECHO) != 0) && |
| 282 | param_copy.ext_fmt.id == PJMEDIA_FORMAT_PCM) |
| 283 | { |
| 284 | if ((snd_port->aud_param.flags & PJMEDIA_AUD_DEV_CAP_EC_TAIL)==0) { |
| 285 | snd_port->aud_param.flags |= PJMEDIA_AUD_DEV_CAP_EC_TAIL; |
| 286 | snd_port->aud_param.ec_tail_ms = AEC_TAIL; |
| 287 | PJ_LOG(4,(THIS_FILE, "AEC tail is set to default %u ms", |
| 288 | snd_port->aud_param.ec_tail_ms)); |
| 289 | } |
| 290 | |
| 291 | status = pjmedia_snd_port_set_ec(snd_port, pool, |
| 292 | snd_port->aud_param.ec_tail_ms, |
| 293 | snd_port->prm_ec_options); |
| 294 | if (status != PJ_SUCCESS) { |
| 295 | pjmedia_aud_stream_destroy(snd_port->aud_stream); |
| 296 | snd_port->aud_stream = NULL; |
| 297 | return status; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | /* Start sound stream. */ |
| 302 | if (!(snd_port->options & PJMEDIA_SND_PORT_NO_AUTO_START)) { |
| 303 | status = pjmedia_aud_stream_start(snd_port->aud_stream); |
| 304 | } |
| 305 | if (status != PJ_SUCCESS) { |
| 306 | pjmedia_aud_stream_destroy(snd_port->aud_stream); |
| 307 | snd_port->aud_stream = NULL; |
| 308 | return status; |
| 309 | } |
| 310 | |
| 311 | return PJ_SUCCESS; |
| 312 | } |
| 313 | |
| 314 | |
| 315 | /* |
| 316 | * Stop the sound device. |
| 317 | * This may be called even when there's no sound device in the port. |
| 318 | */ |
| 319 | static pj_status_t stop_sound_device( pjmedia_snd_port *snd_port ) |
| 320 | { |
| 321 | /* Check if we have sound stream device. */ |
| 322 | if (snd_port->aud_stream) { |
| 323 | pjmedia_aud_stream_stop(snd_port->aud_stream); |
| 324 | pjmedia_aud_stream_destroy(snd_port->aud_stream); |
| 325 | snd_port->aud_stream = NULL; |
| 326 | } |
| 327 | |
| 328 | /* Destroy AEC */ |
| 329 | if (snd_port->ec_state) { |
| 330 | pjmedia_echo_destroy(snd_port->ec_state); |
| 331 | snd_port->ec_state = NULL; |
| 332 | } |
| 333 | |
| 334 | return PJ_SUCCESS; |
| 335 | } |
| 336 | |
| 337 | |
| 338 | /* |
| 339 | * Create bidirectional port. |
| 340 | */ |
| 341 | PJ_DEF(pj_status_t) pjmedia_snd_port_create( pj_pool_t *pool, |
| 342 | int rec_id, |
| 343 | int play_id, |
| 344 | unsigned clock_rate, |
| 345 | unsigned channel_count, |
| 346 | unsigned samples_per_frame, |
| 347 | unsigned bits_per_sample, |
| 348 | unsigned options, |
| 349 | pjmedia_snd_port **p_port) |
| 350 | { |
| 351 | pjmedia_snd_port_param param; |
| 352 | pj_status_t status; |
| 353 | |
| 354 | pjmedia_snd_port_param_default(¶m); |
| 355 | |
| 356 | status = pjmedia_aud_dev_default_param(rec_id, ¶m.base); |
| 357 | if (status != PJ_SUCCESS) |
| 358 | return status; |
| 359 | |
| 360 | param.base.dir = PJMEDIA_DIR_CAPTURE_PLAYBACK; |
| 361 | param.base.rec_id = rec_id; |
| 362 | param.base.play_id = play_id; |
| 363 | param.base.clock_rate = clock_rate; |
| 364 | param.base.channel_count = channel_count; |
| 365 | param.base.samples_per_frame = samples_per_frame; |
| 366 | param.base.bits_per_sample = bits_per_sample; |
| 367 | param.options = options; |
| 368 | param.ec_options = 0; |
| 369 | |
| 370 | return pjmedia_snd_port_create2(pool, ¶m, p_port); |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * Create sound recorder AEC. |
| 375 | */ |
| 376 | PJ_DEF(pj_status_t) pjmedia_snd_port_create_rec( pj_pool_t *pool, |
| 377 | int dev_id, |
| 378 | unsigned clock_rate, |
| 379 | unsigned channel_count, |
| 380 | unsigned samples_per_frame, |
| 381 | unsigned bits_per_sample, |
| 382 | unsigned options, |
| 383 | pjmedia_snd_port **p_port) |
| 384 | { |
| 385 | pjmedia_snd_port_param param; |
| 386 | pj_status_t status; |
| 387 | |
| 388 | pjmedia_snd_port_param_default(¶m); |
| 389 | |
| 390 | status = pjmedia_aud_dev_default_param(dev_id, ¶m.base); |
| 391 | if (status != PJ_SUCCESS) |
| 392 | return status; |
| 393 | |
| 394 | param.base.dir = PJMEDIA_DIR_CAPTURE; |
| 395 | param.base.rec_id = dev_id; |
| 396 | param.base.clock_rate = clock_rate; |
| 397 | param.base.channel_count = channel_count; |
| 398 | param.base.samples_per_frame = samples_per_frame; |
| 399 | param.base.bits_per_sample = bits_per_sample; |
| 400 | param.options = options; |
| 401 | param.ec_options = 0; |
| 402 | |
| 403 | return pjmedia_snd_port_create2(pool, ¶m, p_port); |
| 404 | } |
| 405 | |
| 406 | |
| 407 | /* |
| 408 | * Create sound player port. |
| 409 | */ |
| 410 | PJ_DEF(pj_status_t) pjmedia_snd_port_create_player( pj_pool_t *pool, |
| 411 | int dev_id, |
| 412 | unsigned clock_rate, |
| 413 | unsigned channel_count, |
| 414 | unsigned samples_per_frame, |
| 415 | unsigned bits_per_sample, |
| 416 | unsigned options, |
| 417 | pjmedia_snd_port **p_port) |
| 418 | { |
| 419 | pjmedia_snd_port_param param; |
| 420 | pj_status_t status; |
| 421 | |
| 422 | pjmedia_snd_port_param_default(¶m); |
| 423 | |
| 424 | status = pjmedia_aud_dev_default_param(dev_id, ¶m.base); |
| 425 | if (status != PJ_SUCCESS) |
| 426 | return status; |
| 427 | |
| 428 | param.base.dir = PJMEDIA_DIR_PLAYBACK; |
| 429 | param.base.play_id = dev_id; |
| 430 | param.base.clock_rate = clock_rate; |
| 431 | param.base.channel_count = channel_count; |
| 432 | param.base.samples_per_frame = samples_per_frame; |
| 433 | param.base.bits_per_sample = bits_per_sample; |
| 434 | param.options = options; |
| 435 | param.ec_options = 0; |
| 436 | |
| 437 | return pjmedia_snd_port_create2(pool, ¶m, p_port); |
| 438 | } |
| 439 | |
| 440 | |
| 441 | /* |
| 442 | * Create sound port. |
| 443 | */ |
| 444 | PJ_DEF(pj_status_t) pjmedia_snd_port_create2(pj_pool_t *pool, |
| 445 | const pjmedia_snd_port_param *prm, |
| 446 | pjmedia_snd_port **p_port) |
| 447 | { |
| 448 | pjmedia_snd_port *snd_port; |
| 449 | pj_status_t status; |
| 450 | unsigned ptime_usec; |
| 451 | |
| 452 | PJ_ASSERT_RETURN(pool && prm && p_port, PJ_EINVAL); |
| 453 | |
| 454 | snd_port = PJ_POOL_ZALLOC_T(pool, pjmedia_snd_port); |
| 455 | PJ_ASSERT_RETURN(snd_port, PJ_ENOMEM); |
| 456 | |
| 457 | snd_port->dir = prm->base.dir; |
| 458 | snd_port->rec_id = prm->base.rec_id; |
| 459 | snd_port->play_id = prm->base.play_id; |
| 460 | snd_port->clock_rate = prm->base.clock_rate; |
| 461 | snd_port->channel_count = prm->base.channel_count; |
| 462 | snd_port->samples_per_frame = prm->base.samples_per_frame; |
| 463 | snd_port->bits_per_sample = prm->base.bits_per_sample; |
| 464 | pj_memcpy(&snd_port->aud_param, &prm->base, sizeof(snd_port->aud_param)); |
| 465 | snd_port->options = prm->options; |
| 466 | snd_port->prm_ec_options = prm->ec_options; |
| 467 | |
| 468 | ptime_usec = prm->base.samples_per_frame * 1000 / prm->base.channel_count / |
| 469 | prm->base.clock_rate * 1000; |
| 470 | pjmedia_clock_src_init(&snd_port->cap_clocksrc, PJMEDIA_TYPE_AUDIO, |
| 471 | snd_port->clock_rate, ptime_usec); |
| 472 | pjmedia_clock_src_init(&snd_port->play_clocksrc, PJMEDIA_TYPE_AUDIO, |
| 473 | snd_port->clock_rate, ptime_usec); |
| 474 | |
| 475 | /* Start sound device immediately. |
| 476 | * If there's no port connected, the sound callback will return |
| 477 | * empty signal. |
| 478 | */ |
| 479 | status = start_sound_device( pool, snd_port ); |
| 480 | if (status != PJ_SUCCESS) { |
| 481 | pjmedia_snd_port_destroy(snd_port); |
| 482 | return status; |
| 483 | } |
| 484 | |
| 485 | *p_port = snd_port; |
| 486 | return PJ_SUCCESS; |
| 487 | } |
| 488 | |
| 489 | |
| 490 | /* |
| 491 | * Destroy port (also destroys the sound device). |
| 492 | */ |
| 493 | PJ_DEF(pj_status_t) pjmedia_snd_port_destroy(pjmedia_snd_port *snd_port) |
| 494 | { |
| 495 | PJ_ASSERT_RETURN(snd_port, PJ_EINVAL); |
| 496 | |
| 497 | return stop_sound_device(snd_port); |
| 498 | } |
| 499 | |
| 500 | |
| 501 | /* |
| 502 | * Retrieve the sound stream associated by this sound device port. |
| 503 | */ |
| 504 | PJ_DEF(pjmedia_aud_stream*) pjmedia_snd_port_get_snd_stream( |
| 505 | pjmedia_snd_port *snd_port) |
| 506 | { |
| 507 | PJ_ASSERT_RETURN(snd_port, NULL); |
| 508 | return snd_port->aud_stream; |
| 509 | } |
| 510 | |
| 511 | |
| 512 | /* |
| 513 | * Change EC settings. |
| 514 | */ |
| 515 | PJ_DEF(pj_status_t) pjmedia_snd_port_set_ec( pjmedia_snd_port *snd_port, |
| 516 | pj_pool_t *pool, |
| 517 | unsigned tail_ms, |
| 518 | unsigned options) |
| 519 | { |
| 520 | pjmedia_aud_param prm; |
| 521 | pj_status_t status; |
| 522 | |
| 523 | /* Sound must be opened in full-duplex mode */ |
| 524 | PJ_ASSERT_RETURN(snd_port && |
| 525 | snd_port->dir == PJMEDIA_DIR_CAPTURE_PLAYBACK, |
| 526 | PJ_EINVALIDOP); |
| 527 | |
| 528 | /* Determine whether we use device or software EC */ |
| 529 | if ((snd_port->prm_ec_options & PJMEDIA_ECHO_USE_SW_ECHO) == 0 && |
| 530 | (snd_port->aud_caps & PJMEDIA_AUD_DEV_CAP_EC)) |
| 531 | { |
| 532 | /* We use device EC */ |
| 533 | pj_bool_t ec_enabled; |
| 534 | |
| 535 | /* Query EC status */ |
| 536 | status = pjmedia_aud_stream_get_cap(snd_port->aud_stream, |
| 537 | PJMEDIA_AUD_DEV_CAP_EC, |
| 538 | &ec_enabled); |
| 539 | if (status != PJ_SUCCESS) |
| 540 | return status; |
| 541 | |
| 542 | if (tail_ms != 0) { |
| 543 | /* Change EC setting */ |
| 544 | |
| 545 | if (!ec_enabled) { |
| 546 | /* Enable EC first */ |
| 547 | pj_bool_t value = PJ_TRUE; |
| 548 | status = pjmedia_aud_stream_set_cap(snd_port->aud_stream, |
| 549 | PJMEDIA_AUD_DEV_CAP_EC, |
| 550 | &value); |
| 551 | if (status != PJ_SUCCESS) |
| 552 | return status; |
| 553 | } |
| 554 | |
| 555 | if ((snd_port->aud_caps & PJMEDIA_AUD_DEV_CAP_EC_TAIL)==0) { |
| 556 | /* Device does not support setting EC tail */ |
| 557 | return PJMEDIA_EAUD_INVCAP; |
| 558 | } |
| 559 | |
| 560 | return pjmedia_aud_stream_set_cap(snd_port->aud_stream, |
| 561 | PJMEDIA_AUD_DEV_CAP_EC_TAIL, |
| 562 | &tail_ms); |
| 563 | |
| 564 | } else if (ec_enabled) { |
| 565 | /* Disable EC */ |
| 566 | pj_bool_t value = PJ_FALSE; |
| 567 | return pjmedia_aud_stream_set_cap(snd_port->aud_stream, |
| 568 | PJMEDIA_AUD_DEV_CAP_EC, |
| 569 | &value); |
| 570 | } else { |
| 571 | /* Request to disable EC but EC has been disabled */ |
| 572 | /* Do nothing */ |
| 573 | return PJ_SUCCESS; |
| 574 | } |
| 575 | |
| 576 | } else { |
| 577 | /* We use software EC */ |
| 578 | |
| 579 | /* Check if there is change in parameters */ |
| 580 | if (tail_ms==snd_port->ec_tail_len && options==snd_port->ec_options) { |
| 581 | PJ_LOG(5,(THIS_FILE, "pjmedia_snd_port_set_ec() ignored, no " |
| 582 | "change in settings")); |
| 583 | return PJ_SUCCESS; |
| 584 | } |
| 585 | |
| 586 | status = pjmedia_aud_stream_get_param(snd_port->aud_stream, &prm); |
| 587 | if (status != PJ_SUCCESS) |
| 588 | return status; |
| 589 | |
| 590 | /* Audio stream must be in PCM format */ |
| 591 | PJ_ASSERT_RETURN(prm.ext_fmt.id == PJMEDIA_FORMAT_PCM, |
| 592 | PJ_EINVALIDOP); |
| 593 | |
| 594 | /* Destroy AEC */ |
| 595 | if (snd_port->ec_state) { |
| 596 | pjmedia_echo_destroy(snd_port->ec_state); |
| 597 | snd_port->ec_state = NULL; |
| 598 | } |
| 599 | |
| 600 | if (tail_ms != 0) { |
| 601 | unsigned delay_ms; |
| 602 | |
| 603 | //No need to add input latency in the latency calculation, |
| 604 | //since actual input latency should be zero. |
| 605 | //delay_ms = (si.rec_latency + si.play_latency) * 1000 / |
| 606 | // snd_port->clock_rate; |
| 607 | /* Set EC latency to 3/4 of output latency to reduce the |
| 608 | * possibility of missing/late reference frame. |
| 609 | */ |
| 610 | delay_ms = prm.output_latency_ms * 3/4; |
| 611 | status = pjmedia_echo_create2(pool, snd_port->clock_rate, |
| 612 | snd_port->channel_count, |
| 613 | snd_port->samples_per_frame, |
| 614 | tail_ms, delay_ms, |
| 615 | options, &snd_port->ec_state); |
| 616 | if (status != PJ_SUCCESS) |
| 617 | snd_port->ec_state = NULL; |
| 618 | else |
| 619 | snd_port->ec_suspended = PJ_FALSE; |
| 620 | } else { |
| 621 | PJ_LOG(4,(THIS_FILE, "Echo canceller is now disabled in the " |
| 622 | "sound port")); |
| 623 | status = PJ_SUCCESS; |
| 624 | } |
| 625 | |
| 626 | snd_port->ec_options = options; |
| 627 | snd_port->ec_tail_len = tail_ms; |
| 628 | } |
| 629 | |
| 630 | return status; |
| 631 | } |
| 632 | |
| 633 | |
| 634 | /* Get AEC tail length */ |
| 635 | PJ_DEF(pj_status_t) pjmedia_snd_port_get_ec_tail( pjmedia_snd_port *snd_port, |
| 636 | unsigned *p_length) |
| 637 | { |
| 638 | PJ_ASSERT_RETURN(snd_port && p_length, PJ_EINVAL); |
| 639 | |
| 640 | /* Determine whether we use device or software EC */ |
| 641 | if (snd_port->aud_caps & PJMEDIA_AUD_DEV_CAP_EC) { |
| 642 | /* We use device EC */ |
| 643 | pj_bool_t ec_enabled; |
| 644 | pj_status_t status; |
| 645 | |
| 646 | /* Query EC status */ |
| 647 | status = pjmedia_aud_stream_get_cap(snd_port->aud_stream, |
| 648 | PJMEDIA_AUD_DEV_CAP_EC, |
| 649 | &ec_enabled); |
| 650 | if (status != PJ_SUCCESS) |
| 651 | return status; |
| 652 | |
| 653 | if (!ec_enabled) { |
| 654 | *p_length = 0; |
| 655 | } else if (snd_port->aud_caps & PJMEDIA_AUD_DEV_CAP_EC_TAIL) { |
| 656 | /* Get device EC tail */ |
| 657 | status = pjmedia_aud_stream_get_cap(snd_port->aud_stream, |
| 658 | PJMEDIA_AUD_DEV_CAP_EC_TAIL, |
| 659 | p_length); |
| 660 | if (status != PJ_SUCCESS) |
| 661 | return status; |
| 662 | } else { |
| 663 | /* Just use default */ |
| 664 | *p_length = AEC_TAIL; |
| 665 | } |
| 666 | |
| 667 | } else { |
| 668 | /* We use software EC */ |
| 669 | *p_length = snd_port->ec_state ? snd_port->ec_tail_len : 0; |
| 670 | } |
| 671 | return PJ_SUCCESS; |
| 672 | } |
| 673 | |
| 674 | |
| 675 | /* |
| 676 | * Get clock source. |
| 677 | */ |
| 678 | PJ_DEF(pjmedia_clock_src *) |
| 679 | pjmedia_snd_port_get_clock_src( pjmedia_snd_port *snd_port, |
| 680 | pjmedia_dir dir ) |
| 681 | { |
| 682 | return (dir == PJMEDIA_DIR_CAPTURE? &snd_port->cap_clocksrc: |
| 683 | &snd_port->play_clocksrc); |
| 684 | } |
| 685 | |
| 686 | |
| 687 | /* |
| 688 | * Connect a port. |
| 689 | */ |
| 690 | PJ_DEF(pj_status_t) pjmedia_snd_port_connect( pjmedia_snd_port *snd_port, |
| 691 | pjmedia_port *port) |
| 692 | { |
| 693 | pjmedia_audio_format_detail *afd; |
| 694 | |
| 695 | PJ_ASSERT_RETURN(snd_port && port, PJ_EINVAL); |
| 696 | |
| 697 | afd = pjmedia_format_get_audio_format_detail(&port->info.fmt, PJ_TRUE); |
| 698 | |
| 699 | /* Check that port has the same configuration as the sound device |
| 700 | * port. |
| 701 | */ |
| 702 | if (afd->clock_rate != snd_port->clock_rate) |
| 703 | return PJMEDIA_ENCCLOCKRATE; |
| 704 | |
| 705 | if (PJMEDIA_AFD_SPF(afd) != snd_port->samples_per_frame) |
| 706 | return PJMEDIA_ENCSAMPLESPFRAME; |
| 707 | |
| 708 | if (afd->channel_count != snd_port->channel_count) |
| 709 | return PJMEDIA_ENCCHANNEL; |
| 710 | |
| 711 | if (afd->bits_per_sample != snd_port->bits_per_sample) |
| 712 | return PJMEDIA_ENCBITS; |
| 713 | |
| 714 | /* Port is okay. */ |
| 715 | snd_port->port = port; |
| 716 | return PJ_SUCCESS; |
| 717 | } |
| 718 | |
| 719 | |
| 720 | /* |
| 721 | * Get the connected port. |
| 722 | */ |
| 723 | PJ_DEF(pjmedia_port*) pjmedia_snd_port_get_port(pjmedia_snd_port *snd_port) |
| 724 | { |
| 725 | PJ_ASSERT_RETURN(snd_port, NULL); |
| 726 | return snd_port->port; |
| 727 | } |
| 728 | |
| 729 | |
| 730 | /* |
| 731 | * Disconnect port. |
| 732 | */ |
| 733 | PJ_DEF(pj_status_t) pjmedia_snd_port_disconnect(pjmedia_snd_port *snd_port) |
| 734 | { |
| 735 | PJ_ASSERT_RETURN(snd_port, PJ_EINVAL); |
| 736 | |
| 737 | snd_port->port = NULL; |
| 738 | |
| 739 | return PJ_SUCCESS; |
| 740 | } |
| 741 | |
| 742 | |