Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id: l16.c 3664 2011-07-19 03:42:28Z nanang $ */ |
| 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-codec/l16.h> |
| 21 | #include <pjmedia/codec.h> |
| 22 | #include <pjmedia/errno.h> |
| 23 | #include <pjmedia/endpoint.h> |
| 24 | #include <pjmedia/plc.h> |
| 25 | #include <pjmedia/silencedet.h> |
| 26 | #include <pj/assert.h> |
| 27 | #include <pj/pool.h> |
| 28 | #include <pj/sock.h> |
| 29 | #include <pj/string.h> |
| 30 | |
| 31 | |
| 32 | /* |
| 33 | * Only build this file if PJMEDIA_HAS_L16_CODEC != 0 |
| 34 | */ |
| 35 | #if defined(PJMEDIA_HAS_L16_CODEC) && PJMEDIA_HAS_L16_CODEC != 0 |
| 36 | |
| 37 | #define PLC_DISABLED 0 |
| 38 | |
| 39 | |
| 40 | static const pj_str_t STR_L16 = { "L16", 3 }; |
| 41 | |
| 42 | /* To keep frame size below 1400 MTU, set ptime to 10ms for |
| 43 | * sampling rate > 35 KHz |
| 44 | */ |
| 45 | #define GET_PTIME(clock_rate) ((pj_uint16_t)(clock_rate > 35000 ? 10 : 20)) |
| 46 | |
| 47 | |
| 48 | /* Prototypes for L16 factory */ |
| 49 | static pj_status_t l16_test_alloc( pjmedia_codec_factory *factory, |
| 50 | const pjmedia_codec_info *id ); |
| 51 | static pj_status_t l16_default_attr( pjmedia_codec_factory *factory, |
| 52 | const pjmedia_codec_info *id, |
| 53 | pjmedia_codec_param *attr ); |
| 54 | static pj_status_t l16_enum_codecs (pjmedia_codec_factory *factory, |
| 55 | unsigned *count, |
| 56 | pjmedia_codec_info codecs[]); |
| 57 | static pj_status_t l16_alloc_codec( pjmedia_codec_factory *factory, |
| 58 | const pjmedia_codec_info *id, |
| 59 | pjmedia_codec **p_codec); |
| 60 | static pj_status_t l16_dealloc_codec( pjmedia_codec_factory *factory, |
| 61 | pjmedia_codec *codec ); |
| 62 | |
| 63 | /* Prototypes for L16 implementation. */ |
| 64 | static pj_status_t l16_init( pjmedia_codec *codec, |
| 65 | pj_pool_t *pool ); |
| 66 | static pj_status_t l16_open( pjmedia_codec *codec, |
| 67 | pjmedia_codec_param *attr ); |
| 68 | static pj_status_t l16_close( pjmedia_codec *codec ); |
| 69 | static pj_status_t l16_modify(pjmedia_codec *codec, |
| 70 | const pjmedia_codec_param *attr ); |
| 71 | static pj_status_t l16_parse(pjmedia_codec *codec, |
| 72 | void *pkt, |
| 73 | pj_size_t pkt_size, |
| 74 | const pj_timestamp *ts, |
| 75 | unsigned *frame_cnt, |
| 76 | pjmedia_frame frames[]); |
| 77 | static pj_status_t l16_encode( pjmedia_codec *codec, |
| 78 | const struct pjmedia_frame *input, |
| 79 | unsigned output_buf_len, |
| 80 | struct pjmedia_frame *output); |
| 81 | static pj_status_t l16_decode( pjmedia_codec *codec, |
| 82 | const struct pjmedia_frame *input, |
| 83 | unsigned output_buf_len, |
| 84 | struct pjmedia_frame *output); |
| 85 | #if !PLC_DISABLED |
| 86 | static pj_status_t l16_recover(pjmedia_codec *codec, |
| 87 | unsigned output_buf_len, |
| 88 | struct pjmedia_frame *output); |
| 89 | #endif |
| 90 | |
| 91 | /* Definition for L16 codec operations. */ |
| 92 | static pjmedia_codec_op l16_op = |
| 93 | { |
| 94 | &l16_init, |
| 95 | &l16_open, |
| 96 | &l16_close, |
| 97 | &l16_modify, |
| 98 | &l16_parse, |
| 99 | &l16_encode, |
| 100 | &l16_decode, |
| 101 | #if !PLC_DISABLED |
| 102 | &l16_recover |
| 103 | #else |
| 104 | NULL |
| 105 | #endif |
| 106 | }; |
| 107 | |
| 108 | /* Definition for L16 codec factory operations. */ |
| 109 | static pjmedia_codec_factory_op l16_factory_op = |
| 110 | { |
| 111 | &l16_test_alloc, |
| 112 | &l16_default_attr, |
| 113 | &l16_enum_codecs, |
| 114 | &l16_alloc_codec, |
| 115 | &l16_dealloc_codec, |
| 116 | &pjmedia_codec_l16_deinit |
| 117 | }; |
| 118 | |
| 119 | /* L16 factory private data */ |
| 120 | static struct l16_factory |
| 121 | { |
| 122 | pjmedia_codec_factory base; |
| 123 | pjmedia_endpt *endpt; |
| 124 | pj_pool_t *pool; |
| 125 | pj_mutex_t *mutex; |
| 126 | } l16_factory; |
| 127 | |
| 128 | |
| 129 | /* L16 codec private data. */ |
| 130 | struct l16_data |
| 131 | { |
| 132 | pj_pool_t *pool; |
| 133 | unsigned frame_size; /* Frame size, in bytes */ |
| 134 | unsigned clock_rate; /* Clock rate */ |
| 135 | |
| 136 | #if !PLC_DISABLED |
| 137 | pj_bool_t plc_enabled; |
| 138 | pjmedia_plc *plc; |
| 139 | #endif |
| 140 | pj_bool_t vad_enabled; |
| 141 | pjmedia_silence_det *vad; |
| 142 | pj_timestamp last_tx; |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | |
| 147 | PJ_DEF(pj_status_t) pjmedia_codec_l16_init(pjmedia_endpt *endpt, |
| 148 | unsigned options) |
| 149 | { |
| 150 | pjmedia_codec_mgr *codec_mgr; |
| 151 | pj_status_t status; |
| 152 | |
| 153 | |
| 154 | PJ_UNUSED_ARG(options); |
| 155 | |
| 156 | |
| 157 | if (l16_factory.endpt != NULL) { |
| 158 | /* Already initialized. */ |
| 159 | return PJ_SUCCESS; |
| 160 | } |
| 161 | |
| 162 | /* Init factory */ |
| 163 | l16_factory.base.op = &l16_factory_op; |
| 164 | l16_factory.base.factory_data = NULL; |
| 165 | l16_factory.endpt = endpt; |
| 166 | |
| 167 | /* Create pool */ |
| 168 | l16_factory.pool = pjmedia_endpt_create_pool(endpt, "l16", 4000, 4000); |
| 169 | if (!l16_factory.pool) |
| 170 | return PJ_ENOMEM; |
| 171 | |
| 172 | /* Create mutex. */ |
| 173 | status = pj_mutex_create_simple(l16_factory.pool, "l16", |
| 174 | &l16_factory.mutex); |
| 175 | if (status != PJ_SUCCESS) |
| 176 | goto on_error; |
| 177 | |
| 178 | /* Get the codec manager. */ |
| 179 | codec_mgr = pjmedia_endpt_get_codec_mgr(endpt); |
| 180 | if (!codec_mgr) { |
| 181 | return PJ_EINVALIDOP; |
| 182 | } |
| 183 | |
| 184 | /* Register codec factory to endpoint. */ |
| 185 | status = pjmedia_codec_mgr_register_factory(codec_mgr, |
| 186 | &l16_factory.base); |
| 187 | if (status != PJ_SUCCESS) |
| 188 | return status; |
| 189 | |
| 190 | |
| 191 | return PJ_SUCCESS; |
| 192 | |
| 193 | on_error: |
| 194 | if (l16_factory.mutex) { |
| 195 | pj_mutex_destroy(l16_factory.mutex); |
| 196 | l16_factory.mutex = NULL; |
| 197 | } |
| 198 | if (l16_factory.pool) { |
| 199 | pj_pool_release(l16_factory.pool); |
| 200 | l16_factory.pool = NULL; |
| 201 | } |
| 202 | return status; |
| 203 | } |
| 204 | |
| 205 | PJ_DEF(pj_status_t) pjmedia_codec_l16_deinit(void) |
| 206 | { |
| 207 | pjmedia_codec_mgr *codec_mgr; |
| 208 | pj_status_t status; |
| 209 | |
| 210 | if (l16_factory.endpt == NULL) { |
| 211 | /* Not registered. */ |
| 212 | return PJ_SUCCESS; |
| 213 | } |
| 214 | |
| 215 | /* Lock mutex. */ |
| 216 | pj_mutex_lock(l16_factory.mutex); |
| 217 | |
| 218 | /* Get the codec manager. */ |
| 219 | codec_mgr = pjmedia_endpt_get_codec_mgr(l16_factory.endpt); |
| 220 | if (!codec_mgr) { |
| 221 | l16_factory.endpt = NULL; |
| 222 | pj_mutex_unlock(l16_factory.mutex); |
| 223 | return PJ_EINVALIDOP; |
| 224 | } |
| 225 | |
| 226 | /* Unregister L16 codec factory. */ |
| 227 | status = pjmedia_codec_mgr_unregister_factory(codec_mgr, |
| 228 | &l16_factory.base); |
| 229 | l16_factory.endpt = NULL; |
| 230 | |
| 231 | /* Destroy mutex. */ |
| 232 | pj_mutex_destroy(l16_factory.mutex); |
| 233 | l16_factory.mutex = NULL; |
| 234 | |
| 235 | |
| 236 | /* Release pool. */ |
| 237 | pj_pool_release(l16_factory.pool); |
| 238 | l16_factory.pool = NULL; |
| 239 | |
| 240 | |
| 241 | return status; |
| 242 | } |
| 243 | |
| 244 | static pj_status_t l16_test_alloc(pjmedia_codec_factory *factory, |
| 245 | const pjmedia_codec_info *id ) |
| 246 | { |
| 247 | PJ_UNUSED_ARG(factory); |
| 248 | |
| 249 | if (pj_stricmp(&id->encoding_name, &STR_L16)==0) { |
| 250 | /* Match! */ |
| 251 | return PJ_SUCCESS; |
| 252 | } |
| 253 | |
| 254 | return -1; |
| 255 | } |
| 256 | |
| 257 | static pj_status_t l16_default_attr( pjmedia_codec_factory *factory, |
| 258 | const pjmedia_codec_info *id, |
| 259 | pjmedia_codec_param *attr ) |
| 260 | { |
| 261 | PJ_UNUSED_ARG(factory); |
| 262 | |
| 263 | pj_bzero(attr, sizeof(pjmedia_codec_param)); |
| 264 | attr->info.pt = (pj_uint8_t)id->pt; |
| 265 | attr->info.clock_rate = id->clock_rate; |
| 266 | attr->info.channel_cnt = id->channel_cnt; |
| 267 | attr->info.avg_bps = id->clock_rate * id->channel_cnt * 16; |
| 268 | attr->info.max_bps = attr->info.avg_bps; |
| 269 | attr->info.pcm_bits_per_sample = 16; |
| 270 | |
| 271 | /* To keep frame size below 1400 MTU, set ptime to 10ms for |
| 272 | * sampling rate > 35 KHz |
| 273 | */ |
| 274 | attr->info.frm_ptime = GET_PTIME(id->clock_rate); |
| 275 | |
| 276 | attr->setting.frm_per_pkt = 1; |
| 277 | |
| 278 | attr->setting.vad = 1; |
| 279 | #if !PLC_DISABLED |
| 280 | attr->setting.plc = 1; |
| 281 | #endif |
| 282 | |
| 283 | return PJ_SUCCESS; |
| 284 | } |
| 285 | |
| 286 | static pj_status_t l16_enum_codecs( pjmedia_codec_factory *factory, |
| 287 | unsigned *max_count, |
| 288 | pjmedia_codec_info codecs[]) |
| 289 | { |
| 290 | unsigned count = 0; |
| 291 | |
| 292 | PJ_UNUSED_ARG(factory); |
| 293 | |
| 294 | if (count < *max_count) { |
| 295 | /* Register 44100Hz 1 channel L16 codec */ |
| 296 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 297 | codecs[count].pt = PJMEDIA_RTP_PT_L16_1; |
| 298 | codecs[count].encoding_name = STR_L16; |
| 299 | codecs[count].clock_rate = 44100; |
| 300 | codecs[count].channel_cnt = 1; |
| 301 | ++count; |
| 302 | } |
| 303 | |
| 304 | if (count < *max_count) { |
| 305 | /* Register 44100Hz 2 channels L16 codec */ |
| 306 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 307 | codecs[count].pt = PJMEDIA_RTP_PT_L16_2; |
| 308 | codecs[count].encoding_name = STR_L16; |
| 309 | codecs[count].clock_rate = 44100; |
| 310 | codecs[count].channel_cnt = 2; |
| 311 | ++count; |
| 312 | } |
| 313 | |
| 314 | if (count < *max_count) { |
| 315 | /* 8KHz mono */ |
| 316 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 317 | codecs[count].pt = PJMEDIA_RTP_PT_L16_8KHZ_MONO; |
| 318 | codecs[count].encoding_name = STR_L16; |
| 319 | codecs[count].clock_rate = 8000; |
| 320 | codecs[count].channel_cnt = 1; |
| 321 | ++count; |
| 322 | } |
| 323 | |
| 324 | if (count < *max_count) { |
| 325 | /* 8KHz stereo */ |
| 326 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 327 | codecs[count].pt = PJMEDIA_RTP_PT_L16_8KHZ_STEREO; |
| 328 | codecs[count].encoding_name = STR_L16; |
| 329 | codecs[count].clock_rate = 8000; |
| 330 | codecs[count].channel_cnt = 2; |
| 331 | ++count; |
| 332 | } |
| 333 | |
| 334 | // disable some L16 modes |
| 335 | #if 0 |
| 336 | if (count < *max_count) { |
| 337 | /* 11025 Hz mono */ |
| 338 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 339 | codecs[count].pt = PJMEDIA_RTP_PT_L16_11KHZ_MONO; |
| 340 | codecs[count].encoding_name = STR_L16; |
| 341 | codecs[count].clock_rate = 11025; |
| 342 | codecs[count].channel_cnt = 1; |
| 343 | ++count; |
| 344 | } |
| 345 | |
| 346 | if (count < *max_count) { |
| 347 | /* 11025 Hz stereo */ |
| 348 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 349 | codecs[count].pt = PJMEDIA_RTP_PT_L16_11KHZ_STEREO; |
| 350 | codecs[count].encoding_name = STR_L16; |
| 351 | codecs[count].clock_rate = 11025; |
| 352 | codecs[count].channel_cnt = 2; |
| 353 | ++count; |
| 354 | } |
| 355 | #endif |
| 356 | |
| 357 | if (count < *max_count) { |
| 358 | /* 16000 Hz mono */ |
| 359 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 360 | codecs[count].pt = PJMEDIA_RTP_PT_L16_16KHZ_MONO; |
| 361 | codecs[count].encoding_name = STR_L16; |
| 362 | codecs[count].clock_rate = 16000; |
| 363 | codecs[count].channel_cnt = 1; |
| 364 | ++count; |
| 365 | } |
| 366 | |
| 367 | |
| 368 | if (count < *max_count) { |
| 369 | /* 16000 Hz stereo */ |
| 370 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 371 | codecs[count].pt = PJMEDIA_RTP_PT_L16_16KHZ_STEREO; |
| 372 | codecs[count].encoding_name = STR_L16; |
| 373 | codecs[count].clock_rate = 16000; |
| 374 | codecs[count].channel_cnt = 2; |
| 375 | ++count; |
| 376 | } |
| 377 | |
| 378 | // disable some L16 modes |
| 379 | #if 0 |
| 380 | if (count < *max_count) { |
| 381 | /* 22050 Hz mono */ |
| 382 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 383 | codecs[count].pt = PJMEDIA_RTP_PT_L16_22KHZ_MONO; |
| 384 | codecs[count].encoding_name = STR_L16; |
| 385 | codecs[count].clock_rate = 22050; |
| 386 | codecs[count].channel_cnt = 1; |
| 387 | ++count; |
| 388 | } |
| 389 | |
| 390 | |
| 391 | if (count < *max_count) { |
| 392 | /* 22050 Hz stereo */ |
| 393 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 394 | codecs[count].pt = PJMEDIA_RTP_PT_L16_22KHZ_STEREO; |
| 395 | codecs[count].encoding_name = STR_L16; |
| 396 | codecs[count].clock_rate = 22050; |
| 397 | codecs[count].channel_cnt = 2; |
| 398 | ++count; |
| 399 | } |
| 400 | |
| 401 | if (count < *max_count) { |
| 402 | /* 32000 Hz mono */ |
| 403 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 404 | codecs[count].pt = PJMEDIA_RTP_PT_L16_32KHZ_MONO; |
| 405 | codecs[count].encoding_name = STR_L16; |
| 406 | codecs[count].clock_rate = 32000; |
| 407 | codecs[count].channel_cnt = 1; |
| 408 | ++count; |
| 409 | } |
| 410 | |
| 411 | if (count < *max_count) { |
| 412 | /* 32000 Hz stereo */ |
| 413 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 414 | codecs[count].pt = PJMEDIA_RTP_PT_L16_32KHZ_STEREO; |
| 415 | codecs[count].encoding_name = STR_L16; |
| 416 | codecs[count].clock_rate = 32000; |
| 417 | codecs[count].channel_cnt = 2; |
| 418 | ++count; |
| 419 | } |
| 420 | |
| 421 | if (count < *max_count) { |
| 422 | /* 48KHz mono */ |
| 423 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 424 | codecs[count].pt = PJMEDIA_RTP_PT_L16_48KHZ_MONO; |
| 425 | codecs[count].encoding_name = STR_L16; |
| 426 | codecs[count].clock_rate = 48000; |
| 427 | codecs[count].channel_cnt = 1; |
| 428 | ++count; |
| 429 | } |
| 430 | |
| 431 | if (count < *max_count) { |
| 432 | /* 48KHz stereo */ |
| 433 | codecs[count].type = PJMEDIA_TYPE_AUDIO; |
| 434 | codecs[count].pt = PJMEDIA_RTP_PT_L16_48KHZ_STEREO; |
| 435 | codecs[count].encoding_name = STR_L16; |
| 436 | codecs[count].clock_rate = 48000; |
| 437 | codecs[count].channel_cnt = 2; |
| 438 | ++count; |
| 439 | } |
| 440 | #endif |
| 441 | |
| 442 | |
| 443 | *max_count = count; |
| 444 | |
| 445 | return PJ_SUCCESS; |
| 446 | } |
| 447 | |
| 448 | static pj_status_t l16_alloc_codec( pjmedia_codec_factory *factory, |
| 449 | const pjmedia_codec_info *id, |
| 450 | pjmedia_codec **p_codec) |
| 451 | { |
| 452 | pjmedia_codec *codec = NULL; |
| 453 | struct l16_data *data; |
| 454 | unsigned ptime; |
| 455 | pj_pool_t *pool; |
| 456 | |
| 457 | pj_status_t status; |
| 458 | |
| 459 | PJ_ASSERT_RETURN(factory==&l16_factory.base, PJ_EINVAL); |
| 460 | |
| 461 | /* Lock mutex. */ |
| 462 | pj_mutex_lock(l16_factory.mutex); |
| 463 | |
| 464 | |
| 465 | pool = pjmedia_endpt_create_pool(l16_factory.endpt, "l16", 4000, 4000); |
| 466 | codec = PJ_POOL_ZALLOC_T(pool, pjmedia_codec); |
| 467 | codec->codec_data = pj_pool_alloc(pool, sizeof(struct l16_data)); |
| 468 | codec->factory = factory; |
| 469 | codec->op = &l16_op; |
| 470 | |
| 471 | /* Init private data */ |
| 472 | ptime = GET_PTIME(id->clock_rate); |
| 473 | data = (struct l16_data*) codec->codec_data; |
| 474 | data->frame_size = ptime * id->clock_rate * id->channel_cnt * 2 / 1000; |
| 475 | data->clock_rate = id->clock_rate; |
| 476 | data->pool = pool; |
| 477 | |
| 478 | #if !PLC_DISABLED |
| 479 | /* Create PLC */ |
| 480 | status = pjmedia_plc_create(pool, id->clock_rate, |
| 481 | data->frame_size >> 1, 0, |
| 482 | &data->plc); |
| 483 | if (status != PJ_SUCCESS) { |
| 484 | pj_mutex_unlock(l16_factory.mutex); |
| 485 | return status; |
| 486 | } |
| 487 | #endif |
| 488 | |
| 489 | /* Create silence detector */ |
| 490 | status = pjmedia_silence_det_create(pool, id->clock_rate, |
| 491 | data->frame_size >> 1, |
| 492 | &data->vad); |
| 493 | if (status != PJ_SUCCESS) { |
| 494 | pj_mutex_unlock(l16_factory.mutex); |
| 495 | return status; |
| 496 | } |
| 497 | |
| 498 | *p_codec = codec; |
| 499 | |
| 500 | /* Unlock mutex. */ |
| 501 | pj_mutex_unlock(l16_factory.mutex); |
| 502 | |
| 503 | return PJ_SUCCESS; |
| 504 | } |
| 505 | |
| 506 | static pj_status_t l16_dealloc_codec(pjmedia_codec_factory *factory, |
| 507 | pjmedia_codec *codec ) |
| 508 | { |
| 509 | struct l16_data *data; |
| 510 | |
| 511 | PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); |
| 512 | PJ_ASSERT_RETURN(factory==&l16_factory.base, PJ_EINVAL); |
| 513 | |
| 514 | /* Lock mutex. */ |
| 515 | pj_mutex_lock(l16_factory.mutex); |
| 516 | |
| 517 | /* Just release codec data pool */ |
| 518 | data = (struct l16_data*) codec->codec_data; |
| 519 | pj_assert(data); |
| 520 | pj_pool_release(data->pool); |
| 521 | |
| 522 | /* Unlock mutex. */ |
| 523 | pj_mutex_unlock(l16_factory.mutex); |
| 524 | |
| 525 | return PJ_SUCCESS; |
| 526 | } |
| 527 | |
| 528 | static pj_status_t l16_init( pjmedia_codec *codec, pj_pool_t *pool ) |
| 529 | { |
| 530 | /* There's nothing to do here really */ |
| 531 | PJ_UNUSED_ARG(codec); |
| 532 | PJ_UNUSED_ARG(pool); |
| 533 | |
| 534 | return PJ_SUCCESS; |
| 535 | } |
| 536 | |
| 537 | static pj_status_t l16_open(pjmedia_codec *codec, |
| 538 | pjmedia_codec_param *attr ) |
| 539 | { |
| 540 | struct l16_data *data = NULL; |
| 541 | |
| 542 | PJ_ASSERT_RETURN(codec && codec->codec_data && attr, PJ_EINVAL); |
| 543 | |
| 544 | data = (struct l16_data*) codec->codec_data; |
| 545 | |
| 546 | data->vad_enabled = (attr->setting.vad != 0); |
| 547 | #if !PLC_DISABLED |
| 548 | data->plc_enabled = (attr->setting.plc != 0); |
| 549 | #endif |
| 550 | |
| 551 | return PJ_SUCCESS; |
| 552 | } |
| 553 | |
| 554 | static pj_status_t l16_close( pjmedia_codec *codec ) |
| 555 | { |
| 556 | PJ_UNUSED_ARG(codec); |
| 557 | /* Nothing to do */ |
| 558 | return PJ_SUCCESS; |
| 559 | } |
| 560 | |
| 561 | static pj_status_t l16_modify(pjmedia_codec *codec, |
| 562 | const pjmedia_codec_param *attr ) |
| 563 | { |
| 564 | struct l16_data *data = (struct l16_data*) codec->codec_data; |
| 565 | |
| 566 | pj_assert(data != NULL); |
| 567 | |
| 568 | data->vad_enabled = (attr->setting.vad != 0); |
| 569 | #if !PLC_DISABLED |
| 570 | data->plc_enabled = (attr->setting.plc != 0); |
| 571 | #endif |
| 572 | |
| 573 | return PJ_SUCCESS; |
| 574 | } |
| 575 | |
| 576 | static pj_status_t l16_parse( pjmedia_codec *codec, |
| 577 | void *pkt, |
| 578 | pj_size_t pkt_size, |
| 579 | const pj_timestamp *ts, |
| 580 | unsigned *frame_cnt, |
| 581 | pjmedia_frame frames[]) |
| 582 | { |
| 583 | unsigned count = 0; |
| 584 | struct l16_data *data = (struct l16_data*) codec->codec_data; |
| 585 | |
| 586 | PJ_UNUSED_ARG(codec); |
| 587 | PJ_ASSERT_RETURN(frame_cnt, PJ_EINVAL); |
| 588 | |
| 589 | while (pkt_size >= data->frame_size && count < *frame_cnt) { |
| 590 | frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 591 | frames[count].buf = pkt; |
| 592 | frames[count].size = data->frame_size; |
| 593 | frames[count].timestamp.u64 = ts->u64 + (count * data->frame_size); |
| 594 | |
| 595 | pkt = ((char*)pkt) + data->frame_size; |
| 596 | pkt_size -= data->frame_size; |
| 597 | |
| 598 | ++count; |
| 599 | } |
| 600 | |
| 601 | *frame_cnt = count; |
| 602 | return PJ_SUCCESS; |
| 603 | } |
| 604 | |
| 605 | static pj_status_t l16_encode(pjmedia_codec *codec, |
| 606 | const struct pjmedia_frame *input, |
| 607 | unsigned output_buf_len, |
| 608 | struct pjmedia_frame *output) |
| 609 | { |
| 610 | struct l16_data *data = (struct l16_data*) codec->codec_data; |
| 611 | const pj_int16_t *samp = (const pj_int16_t*) input->buf; |
| 612 | const pj_int16_t *samp_end = samp + input->size/sizeof(pj_int16_t); |
| 613 | pj_int16_t *samp_out = (pj_int16_t*) output->buf; |
| 614 | |
| 615 | pj_assert(data && input && output); |
| 616 | |
| 617 | /* Check output buffer length */ |
| 618 | if (output_buf_len < input->size) |
| 619 | return PJMEDIA_CODEC_EFRMTOOSHORT; |
| 620 | |
| 621 | /* Detect silence */ |
| 622 | if (data->vad_enabled) { |
| 623 | pj_bool_t is_silence; |
| 624 | pj_int32_t silence_duration; |
| 625 | |
| 626 | silence_duration = pj_timestamp_diff32(&data->last_tx, |
| 627 | &input->timestamp); |
| 628 | |
| 629 | is_silence = pjmedia_silence_det_detect(data->vad, |
| 630 | (const pj_int16_t*) input->buf, |
| 631 | (input->size >> 1), |
| 632 | NULL); |
| 633 | if (is_silence && |
| 634 | (PJMEDIA_CODEC_MAX_SILENCE_PERIOD == -1 || |
| 635 | silence_duration < PJMEDIA_CODEC_MAX_SILENCE_PERIOD* |
| 636 | (int)data->clock_rate/1000)) |
| 637 | { |
| 638 | output->type = PJMEDIA_FRAME_TYPE_NONE; |
| 639 | output->buf = NULL; |
| 640 | output->size = 0; |
| 641 | output->timestamp = input->timestamp; |
| 642 | return PJ_SUCCESS; |
| 643 | } else { |
| 644 | data->last_tx = input->timestamp; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | /* Encode */ |
| 649 | #if defined(PJ_IS_LITTLE_ENDIAN) && PJ_IS_LITTLE_ENDIAN!=0 |
| 650 | while (samp!=samp_end) |
| 651 | *samp_out++ = pj_htons(*samp++); |
| 652 | #else |
| 653 | pjmedia_copy_samples(samp_out, samp, input->size >> 1); |
| 654 | #endif |
| 655 | |
| 656 | |
| 657 | /* Done */ |
| 658 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 659 | output->size = input->size; |
| 660 | output->timestamp = input->timestamp; |
| 661 | |
| 662 | return PJ_SUCCESS; |
| 663 | } |
| 664 | |
| 665 | static pj_status_t l16_decode(pjmedia_codec *codec, |
| 666 | const struct pjmedia_frame *input, |
| 667 | unsigned output_buf_len, |
| 668 | struct pjmedia_frame *output) |
| 669 | { |
| 670 | struct l16_data *l16_data = (struct l16_data*) codec->codec_data; |
| 671 | const pj_int16_t *samp = (const pj_int16_t*) input->buf; |
| 672 | const pj_int16_t *samp_end = samp + input->size/sizeof(pj_int16_t); |
| 673 | pj_int16_t *samp_out = (pj_int16_t*) output->buf; |
| 674 | |
| 675 | pj_assert(l16_data != NULL); |
| 676 | PJ_ASSERT_RETURN(input && output, PJ_EINVAL); |
| 677 | |
| 678 | |
| 679 | /* Check output buffer length */ |
| 680 | if (output_buf_len < input->size) |
| 681 | return PJMEDIA_CODEC_EPCMTOOSHORT; |
| 682 | |
| 683 | |
| 684 | /* Decode */ |
| 685 | #if defined(PJ_IS_LITTLE_ENDIAN) && PJ_IS_LITTLE_ENDIAN!=0 |
| 686 | while (samp!=samp_end) |
| 687 | *samp_out++ = pj_htons(*samp++); |
| 688 | #else |
| 689 | pjmedia_copy_samples(samp_out, samp, input->size >> 1); |
| 690 | #endif |
| 691 | |
| 692 | |
| 693 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 694 | output->size = input->size; |
| 695 | output->timestamp = input->timestamp; |
| 696 | |
| 697 | #if !PLC_DISABLED |
| 698 | if (l16_data->plc_enabled) |
| 699 | pjmedia_plc_save( l16_data->plc, (pj_int16_t*)output->buf); |
| 700 | #endif |
| 701 | |
| 702 | return PJ_SUCCESS; |
| 703 | } |
| 704 | |
| 705 | #if !PLC_DISABLED |
| 706 | /* |
| 707 | * Recover lost frame. |
| 708 | */ |
| 709 | static pj_status_t l16_recover(pjmedia_codec *codec, |
| 710 | unsigned output_buf_len, |
| 711 | struct pjmedia_frame *output) |
| 712 | { |
| 713 | struct l16_data *data = (struct l16_data*) codec->codec_data; |
| 714 | |
| 715 | PJ_ASSERT_RETURN(data->plc_enabled, PJ_EINVALIDOP); |
| 716 | |
| 717 | PJ_ASSERT_RETURN(output_buf_len >= data->frame_size, |
| 718 | PJMEDIA_CODEC_EPCMTOOSHORT); |
| 719 | |
| 720 | pjmedia_plc_generate(data->plc, (pj_int16_t*)output->buf); |
| 721 | output->size = data->frame_size; |
| 722 | |
| 723 | return PJ_SUCCESS; |
| 724 | } |
| 725 | #endif |
| 726 | |
| 727 | #endif /* PJMEDIA_HAS_L16_CODEC */ |
| 728 | |
| 729 | |