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-codec/ilbc.h> |
| 21 | #include <pjmedia-codec/types.h> |
| 22 | #include <pjmedia/codec.h> |
| 23 | #include <pjmedia/errno.h> |
| 24 | #include <pjmedia/endpoint.h> |
| 25 | #include <pjmedia/plc.h> |
| 26 | #include <pjmedia/port.h> |
| 27 | #include <pjmedia/silencedet.h> |
| 28 | #include <pj/assert.h> |
| 29 | #include <pj/log.h> |
| 30 | #include <pj/pool.h> |
| 31 | #include <pj/string.h> |
| 32 | #include <pj/os.h> |
| 33 | |
| 34 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 35 | #include <AudioToolbox/AudioToolbox.h> |
| 36 | #define iLBC_Enc_Inst_t AudioConverterRef |
| 37 | #define iLBC_Dec_Inst_t AudioConverterRef |
| 38 | #define BLOCKL_MAX 1 |
| 39 | #else |
| 40 | #include "../../third_party/ilbc/iLBC_encode.h" |
| 41 | #include "../../third_party/ilbc/iLBC_decode.h" |
| 42 | #endif |
| 43 | |
| 44 | /* |
| 45 | * Only build this file if PJMEDIA_HAS_ILBC_CODEC != 0 |
| 46 | */ |
| 47 | #if defined(PJMEDIA_HAS_ILBC_CODEC) && PJMEDIA_HAS_ILBC_CODEC != 0 |
| 48 | |
| 49 | |
| 50 | #define THIS_FILE "ilbc.c" |
| 51 | #define CLOCK_RATE 8000 |
| 52 | #define DEFAULT_MODE 30 |
| 53 | |
| 54 | |
| 55 | /* Prototypes for iLBC factory */ |
| 56 | static pj_status_t ilbc_test_alloc(pjmedia_codec_factory *factory, |
| 57 | const pjmedia_codec_info *id ); |
| 58 | static pj_status_t ilbc_default_attr(pjmedia_codec_factory *factory, |
| 59 | const pjmedia_codec_info *id, |
| 60 | pjmedia_codec_param *attr ); |
| 61 | static pj_status_t ilbc_enum_codecs(pjmedia_codec_factory *factory, |
| 62 | unsigned *count, |
| 63 | pjmedia_codec_info codecs[]); |
| 64 | static pj_status_t ilbc_alloc_codec(pjmedia_codec_factory *factory, |
| 65 | const pjmedia_codec_info *id, |
| 66 | pjmedia_codec **p_codec); |
| 67 | static pj_status_t ilbc_dealloc_codec(pjmedia_codec_factory *factory, |
| 68 | pjmedia_codec *codec ); |
| 69 | |
| 70 | /* Prototypes for iLBC implementation. */ |
| 71 | static pj_status_t ilbc_codec_init(pjmedia_codec *codec, |
| 72 | pj_pool_t *pool ); |
| 73 | static pj_status_t ilbc_codec_open(pjmedia_codec *codec, |
| 74 | pjmedia_codec_param *attr ); |
| 75 | static pj_status_t ilbc_codec_close(pjmedia_codec *codec ); |
| 76 | static pj_status_t ilbc_codec_modify(pjmedia_codec *codec, |
| 77 | const pjmedia_codec_param *attr ); |
| 78 | static pj_status_t ilbc_codec_parse(pjmedia_codec *codec, |
| 79 | void *pkt, |
| 80 | pj_size_t pkt_size, |
| 81 | const pj_timestamp *ts, |
| 82 | unsigned *frame_cnt, |
| 83 | pjmedia_frame frames[]); |
| 84 | static pj_status_t ilbc_codec_encode(pjmedia_codec *codec, |
| 85 | const struct pjmedia_frame *input, |
| 86 | unsigned output_buf_len, |
| 87 | struct pjmedia_frame *output); |
| 88 | static pj_status_t ilbc_codec_decode(pjmedia_codec *codec, |
| 89 | const struct pjmedia_frame *input, |
| 90 | unsigned output_buf_len, |
| 91 | struct pjmedia_frame *output); |
| 92 | static pj_status_t ilbc_codec_recover(pjmedia_codec *codec, |
| 93 | unsigned output_buf_len, |
| 94 | struct pjmedia_frame *output); |
| 95 | |
| 96 | /* Definition for iLBC codec operations. */ |
| 97 | static pjmedia_codec_op ilbc_op = |
| 98 | { |
| 99 | &ilbc_codec_init, |
| 100 | &ilbc_codec_open, |
| 101 | &ilbc_codec_close, |
| 102 | &ilbc_codec_modify, |
| 103 | &ilbc_codec_parse, |
| 104 | &ilbc_codec_encode, |
| 105 | &ilbc_codec_decode, |
| 106 | &ilbc_codec_recover |
| 107 | }; |
| 108 | |
| 109 | /* Definition for iLBC codec factory operations. */ |
| 110 | static pjmedia_codec_factory_op ilbc_factory_op = |
| 111 | { |
| 112 | &ilbc_test_alloc, |
| 113 | &ilbc_default_attr, |
| 114 | &ilbc_enum_codecs, |
| 115 | &ilbc_alloc_codec, |
| 116 | &ilbc_dealloc_codec, |
| 117 | &pjmedia_codec_ilbc_deinit |
| 118 | }; |
| 119 | |
| 120 | /* iLBC factory */ |
| 121 | static struct ilbc_factory |
| 122 | { |
| 123 | pjmedia_codec_factory base; |
| 124 | pjmedia_endpt *endpt; |
| 125 | |
| 126 | int mode; |
| 127 | int bps; |
| 128 | } ilbc_factory; |
| 129 | |
| 130 | |
| 131 | /* iLBC codec private data. */ |
| 132 | struct ilbc_codec |
| 133 | { |
| 134 | pjmedia_codec base; |
| 135 | pj_pool_t *pool; |
| 136 | char obj_name[PJ_MAX_OBJ_NAME]; |
| 137 | pjmedia_silence_det *vad; |
| 138 | pj_bool_t vad_enabled; |
| 139 | pj_bool_t plc_enabled; |
| 140 | pj_timestamp last_tx; |
| 141 | |
| 142 | |
| 143 | pj_bool_t enc_ready; |
| 144 | iLBC_Enc_Inst_t enc; |
| 145 | unsigned enc_frame_size; |
| 146 | unsigned enc_samples_per_frame; |
| 147 | float enc_block[BLOCKL_MAX]; |
| 148 | |
| 149 | pj_bool_t dec_ready; |
| 150 | iLBC_Dec_Inst_t dec; |
| 151 | unsigned dec_frame_size; |
| 152 | unsigned dec_samples_per_frame; |
| 153 | float dec_block[BLOCKL_MAX]; |
| 154 | |
| 155 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 156 | unsigned enc_total_packets; |
| 157 | char *enc_buffer; |
| 158 | unsigned enc_buffer_offset; |
| 159 | |
| 160 | unsigned dec_total_packets; |
| 161 | char *dec_buffer; |
| 162 | unsigned dec_buffer_offset; |
| 163 | #endif |
| 164 | }; |
| 165 | |
| 166 | static pj_str_t STR_MODE = {"mode", 4}; |
| 167 | |
| 168 | /* |
| 169 | * Initialize and register iLBC codec factory to pjmedia endpoint. |
| 170 | */ |
| 171 | PJ_DEF(pj_status_t) pjmedia_codec_ilbc_init( pjmedia_endpt *endpt, |
| 172 | int mode ) |
| 173 | { |
| 174 | pjmedia_codec_mgr *codec_mgr; |
| 175 | pj_status_t status; |
| 176 | |
| 177 | PJ_ASSERT_RETURN(endpt != NULL, PJ_EINVAL); |
| 178 | PJ_ASSERT_RETURN(mode==0 || mode==20 || mode==30, PJ_EINVAL); |
| 179 | |
| 180 | /* Create iLBC codec factory. */ |
| 181 | ilbc_factory.base.op = &ilbc_factory_op; |
| 182 | ilbc_factory.base.factory_data = NULL; |
| 183 | ilbc_factory.endpt = endpt; |
| 184 | |
| 185 | if (mode == 0) |
| 186 | mode = DEFAULT_MODE; |
| 187 | |
| 188 | ilbc_factory.mode = mode; |
| 189 | |
| 190 | if (mode == 20) { |
| 191 | ilbc_factory.bps = 15200; |
| 192 | } else { |
| 193 | ilbc_factory.bps = 13333; |
| 194 | } |
| 195 | |
| 196 | /* Get the codec manager. */ |
| 197 | codec_mgr = pjmedia_endpt_get_codec_mgr(endpt); |
| 198 | if (!codec_mgr) |
| 199 | return PJ_EINVALIDOP; |
| 200 | |
| 201 | /* Register codec factory to endpoint. */ |
| 202 | status = pjmedia_codec_mgr_register_factory(codec_mgr, |
| 203 | &ilbc_factory.base); |
| 204 | if (status != PJ_SUCCESS) |
| 205 | return status; |
| 206 | |
| 207 | |
| 208 | /* Done. */ |
| 209 | return PJ_SUCCESS; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | |
| 214 | /* |
| 215 | * Unregister iLBC codec factory from pjmedia endpoint and deinitialize |
| 216 | * the iLBC codec library. |
| 217 | */ |
| 218 | PJ_DEF(pj_status_t) pjmedia_codec_ilbc_deinit(void) |
| 219 | { |
| 220 | pjmedia_codec_mgr *codec_mgr; |
| 221 | pj_status_t status; |
| 222 | |
| 223 | |
| 224 | /* Get the codec manager. */ |
| 225 | codec_mgr = pjmedia_endpt_get_codec_mgr(ilbc_factory.endpt); |
| 226 | if (!codec_mgr) |
| 227 | return PJ_EINVALIDOP; |
| 228 | |
| 229 | /* Unregister iLBC codec factory. */ |
| 230 | status = pjmedia_codec_mgr_unregister_factory(codec_mgr, |
| 231 | &ilbc_factory.base); |
| 232 | |
| 233 | return status; |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * Check if factory can allocate the specified codec. |
| 238 | */ |
| 239 | static pj_status_t ilbc_test_alloc( pjmedia_codec_factory *factory, |
| 240 | const pjmedia_codec_info *info ) |
| 241 | { |
| 242 | const pj_str_t ilbc_tag = { "iLBC", 4}; |
| 243 | |
| 244 | PJ_UNUSED_ARG(factory); |
| 245 | PJ_ASSERT_RETURN(factory==&ilbc_factory.base, PJ_EINVAL); |
| 246 | |
| 247 | |
| 248 | /* Type MUST be audio. */ |
| 249 | if (info->type != PJMEDIA_TYPE_AUDIO) |
| 250 | return PJMEDIA_CODEC_EUNSUP; |
| 251 | |
| 252 | /* Check encoding name. */ |
| 253 | if (pj_stricmp(&info->encoding_name, &ilbc_tag) != 0) |
| 254 | return PJMEDIA_CODEC_EUNSUP; |
| 255 | |
| 256 | /* Check clock-rate */ |
| 257 | if (info->clock_rate != CLOCK_RATE) |
| 258 | return PJMEDIA_CODEC_EUNSUP; |
| 259 | |
| 260 | /* Channel count must be one */ |
| 261 | if (info->channel_cnt != 1) |
| 262 | return PJMEDIA_CODEC_EUNSUP; |
| 263 | |
| 264 | /* Yes, this should be iLBC! */ |
| 265 | return PJ_SUCCESS; |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* |
| 270 | * Generate default attribute. |
| 271 | */ |
| 272 | static pj_status_t ilbc_default_attr (pjmedia_codec_factory *factory, |
| 273 | const pjmedia_codec_info *id, |
| 274 | pjmedia_codec_param *attr ) |
| 275 | { |
| 276 | PJ_UNUSED_ARG(factory); |
| 277 | PJ_ASSERT_RETURN(factory==&ilbc_factory.base, PJ_EINVAL); |
| 278 | |
| 279 | PJ_UNUSED_ARG(id); |
| 280 | PJ_ASSERT_RETURN(pj_stricmp2(&id->encoding_name, "iLBC")==0, PJ_EINVAL); |
| 281 | |
| 282 | pj_bzero(attr, sizeof(pjmedia_codec_param)); |
| 283 | |
| 284 | attr->info.clock_rate = CLOCK_RATE; |
| 285 | attr->info.channel_cnt = 1; |
| 286 | attr->info.avg_bps = ilbc_factory.bps; |
| 287 | attr->info.max_bps = 15200; |
| 288 | attr->info.pcm_bits_per_sample = 16; |
| 289 | attr->info.frm_ptime = (short)ilbc_factory.mode; |
| 290 | attr->info.pt = PJMEDIA_RTP_PT_ILBC; |
| 291 | |
| 292 | attr->setting.frm_per_pkt = 1; |
| 293 | attr->setting.vad = 1; |
| 294 | attr->setting.plc = 1; |
| 295 | attr->setting.penh = 1; |
| 296 | attr->setting.dec_fmtp.cnt = 1; |
| 297 | attr->setting.dec_fmtp.param[0].name = STR_MODE; |
| 298 | if (ilbc_factory.mode == 30) |
| 299 | attr->setting.dec_fmtp.param[0].val = pj_str("30"); |
| 300 | else |
| 301 | attr->setting.dec_fmtp.param[0].val = pj_str("20"); |
| 302 | |
| 303 | return PJ_SUCCESS; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Enum codecs supported by this factory (i.e. only iLBC!). |
| 308 | */ |
| 309 | static pj_status_t ilbc_enum_codecs(pjmedia_codec_factory *factory, |
| 310 | unsigned *count, |
| 311 | pjmedia_codec_info codecs[]) |
| 312 | { |
| 313 | PJ_UNUSED_ARG(factory); |
| 314 | PJ_ASSERT_RETURN(factory==&ilbc_factory.base, PJ_EINVAL); |
| 315 | |
| 316 | PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL); |
| 317 | |
| 318 | pj_bzero(&codecs[0], sizeof(pjmedia_codec_info)); |
| 319 | |
| 320 | codecs[0].encoding_name = pj_str("iLBC"); |
| 321 | codecs[0].pt = PJMEDIA_RTP_PT_ILBC; |
| 322 | codecs[0].type = PJMEDIA_TYPE_AUDIO; |
| 323 | codecs[0].clock_rate = 8000; |
| 324 | codecs[0].channel_cnt = 1; |
| 325 | |
| 326 | *count = 1; |
| 327 | |
| 328 | return PJ_SUCCESS; |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Allocate a new iLBC codec instance. |
| 333 | */ |
| 334 | static pj_status_t ilbc_alloc_codec(pjmedia_codec_factory *factory, |
| 335 | const pjmedia_codec_info *id, |
| 336 | pjmedia_codec **p_codec) |
| 337 | { |
| 338 | pj_pool_t *pool; |
| 339 | struct ilbc_codec *codec; |
| 340 | |
| 341 | PJ_ASSERT_RETURN(factory && id && p_codec, PJ_EINVAL); |
| 342 | PJ_ASSERT_RETURN(factory == &ilbc_factory.base, PJ_EINVAL); |
| 343 | |
| 344 | pool = pjmedia_endpt_create_pool(ilbc_factory.endpt, "iLBC%p", |
| 345 | 2000, 2000); |
| 346 | PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM); |
| 347 | |
| 348 | codec = PJ_POOL_ZALLOC_T(pool, struct ilbc_codec); |
| 349 | codec->base.op = &ilbc_op; |
| 350 | codec->base.factory = factory; |
| 351 | codec->pool = pool; |
| 352 | |
| 353 | pj_ansi_snprintf(codec->obj_name, sizeof(codec->obj_name), |
| 354 | "ilbc%p", codec); |
| 355 | |
| 356 | *p_codec = &codec->base; |
| 357 | return PJ_SUCCESS; |
| 358 | } |
| 359 | |
| 360 | |
| 361 | /* |
| 362 | * Free codec. |
| 363 | */ |
| 364 | static pj_status_t ilbc_dealloc_codec( pjmedia_codec_factory *factory, |
| 365 | pjmedia_codec *codec ) |
| 366 | { |
| 367 | struct ilbc_codec *ilbc_codec; |
| 368 | |
| 369 | PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); |
| 370 | PJ_UNUSED_ARG(factory); |
| 371 | PJ_ASSERT_RETURN(factory == &ilbc_factory.base, PJ_EINVAL); |
| 372 | |
| 373 | ilbc_codec = (struct ilbc_codec*) codec; |
| 374 | |
| 375 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 376 | if (ilbc_codec->enc) { |
| 377 | AudioConverterDispose(ilbc_codec->enc); |
| 378 | ilbc_codec->enc = NULL; |
| 379 | } |
| 380 | if (ilbc_codec->dec) { |
| 381 | AudioConverterDispose(ilbc_codec->dec); |
| 382 | ilbc_codec->dec = NULL; |
| 383 | } |
| 384 | #endif |
| 385 | |
| 386 | pj_pool_release(ilbc_codec->pool); |
| 387 | |
| 388 | return PJ_SUCCESS; |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * Init codec. |
| 393 | */ |
| 394 | static pj_status_t ilbc_codec_init(pjmedia_codec *codec, |
| 395 | pj_pool_t *pool ) |
| 396 | { |
| 397 | PJ_UNUSED_ARG(codec); |
| 398 | PJ_UNUSED_ARG(pool); |
| 399 | return PJ_SUCCESS; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Open codec. |
| 404 | */ |
| 405 | static pj_status_t ilbc_codec_open(pjmedia_codec *codec, |
| 406 | pjmedia_codec_param *attr ) |
| 407 | { |
| 408 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 409 | pj_status_t status; |
| 410 | unsigned i; |
| 411 | pj_uint16_t dec_fmtp_mode = DEFAULT_MODE, |
| 412 | enc_fmtp_mode = DEFAULT_MODE; |
| 413 | |
| 414 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 415 | AudioStreamBasicDescription srcFormat, dstFormat; |
| 416 | UInt32 size; |
| 417 | |
| 418 | srcFormat.mSampleRate = attr->info.clock_rate; |
| 419 | srcFormat.mFormatID = kAudioFormatLinearPCM; |
| 420 | srcFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger |
| 421 | | kLinearPCMFormatFlagIsPacked; |
| 422 | srcFormat.mBitsPerChannel = attr->info.pcm_bits_per_sample; |
| 423 | srcFormat.mChannelsPerFrame = attr->info.channel_cnt; |
| 424 | srcFormat.mBytesPerFrame = srcFormat.mChannelsPerFrame |
| 425 | * srcFormat.mBitsPerChannel >> 3; |
| 426 | srcFormat.mFramesPerPacket = 1; |
| 427 | srcFormat.mBytesPerPacket = srcFormat.mBytesPerFrame * |
| 428 | srcFormat.mFramesPerPacket; |
| 429 | |
| 430 | memset(&dstFormat, 0, sizeof(dstFormat)); |
| 431 | dstFormat.mSampleRate = attr->info.clock_rate; |
| 432 | dstFormat.mFormatID = kAudioFormatiLBC; |
| 433 | dstFormat.mChannelsPerFrame = attr->info.channel_cnt; |
| 434 | #endif |
| 435 | |
| 436 | pj_assert(ilbc_codec != NULL); |
| 437 | pj_assert(ilbc_codec->enc_ready == PJ_FALSE && |
| 438 | ilbc_codec->dec_ready == PJ_FALSE); |
| 439 | |
| 440 | /* Get decoder mode */ |
| 441 | for (i = 0; i < attr->setting.dec_fmtp.cnt; ++i) { |
| 442 | if (pj_stricmp(&attr->setting.dec_fmtp.param[i].name, &STR_MODE) == 0) |
| 443 | { |
| 444 | dec_fmtp_mode = (pj_uint16_t) |
| 445 | pj_strtoul(&attr->setting.dec_fmtp.param[i].val); |
| 446 | break; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | /* Decoder mode must be set */ |
| 451 | PJ_ASSERT_RETURN(dec_fmtp_mode == 20 || dec_fmtp_mode == 30, |
| 452 | PJMEDIA_CODEC_EINMODE); |
| 453 | |
| 454 | /* Get encoder mode */ |
| 455 | for (i = 0; i < attr->setting.enc_fmtp.cnt; ++i) { |
| 456 | if (pj_stricmp(&attr->setting.enc_fmtp.param[i].name, &STR_MODE) == 0) |
| 457 | { |
| 458 | enc_fmtp_mode = (pj_uint16_t) |
| 459 | pj_strtoul(&attr->setting.enc_fmtp.param[i].val); |
| 460 | break; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | PJ_ASSERT_RETURN(enc_fmtp_mode==20 || enc_fmtp_mode==30, |
| 465 | PJMEDIA_CODEC_EINMODE); |
| 466 | |
| 467 | /* Both sides of a bi-directional session MUST use the same "mode" value. |
| 468 | * In this point, possible values are only 20 or 30, so when encoder and |
| 469 | * decoder modes are not same, just use the default mode, it is 30. |
| 470 | */ |
| 471 | if (enc_fmtp_mode != dec_fmtp_mode) { |
| 472 | enc_fmtp_mode = dec_fmtp_mode = DEFAULT_MODE; |
| 473 | PJ_LOG(4,(ilbc_codec->obj_name, |
| 474 | "Normalized iLBC encoder and decoder modes to %d", |
| 475 | DEFAULT_MODE)); |
| 476 | } |
| 477 | |
| 478 | /* Update some attributes based on negotiated mode. */ |
| 479 | attr->info.avg_bps = (dec_fmtp_mode == 30? 13333 : 15200); |
| 480 | attr->info.frm_ptime = dec_fmtp_mode; |
| 481 | |
| 482 | /* Create encoder */ |
| 483 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 484 | dstFormat.mFramesPerPacket = CLOCK_RATE * enc_fmtp_mode / 1000; |
| 485 | dstFormat.mBytesPerPacket = (enc_fmtp_mode == 20? 38 : 50); |
| 486 | |
| 487 | /* Use AudioFormat API to fill out the rest of the description */ |
| 488 | size = sizeof(dstFormat); |
| 489 | AudioFormatGetProperty(kAudioFormatProperty_FormatInfo, |
| 490 | 0, NULL, &size, &dstFormat); |
| 491 | |
| 492 | if (AudioConverterNew(&srcFormat, &dstFormat, &ilbc_codec->enc) != noErr) |
| 493 | return PJMEDIA_CODEC_EFAILED; |
| 494 | ilbc_codec->enc_frame_size = (enc_fmtp_mode == 20? 38 : 50); |
| 495 | #else |
| 496 | ilbc_codec->enc_frame_size = initEncode(&ilbc_codec->enc, enc_fmtp_mode); |
| 497 | #endif |
| 498 | ilbc_codec->enc_samples_per_frame = CLOCK_RATE * enc_fmtp_mode / 1000; |
| 499 | ilbc_codec->enc_ready = PJ_TRUE; |
| 500 | |
| 501 | /* Create decoder */ |
| 502 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 503 | if (AudioConverterNew(&dstFormat, &srcFormat, &ilbc_codec->dec) != noErr) |
| 504 | return PJMEDIA_CODEC_EFAILED; |
| 505 | ilbc_codec->dec_samples_per_frame = CLOCK_RATE * dec_fmtp_mode / 1000; |
| 506 | #else |
| 507 | ilbc_codec->dec_samples_per_frame = initDecode(&ilbc_codec->dec, |
| 508 | dec_fmtp_mode, |
| 509 | attr->setting.penh); |
| 510 | #endif |
| 511 | ilbc_codec->dec_frame_size = (dec_fmtp_mode == 20? 38 : 50); |
| 512 | ilbc_codec->dec_ready = PJ_TRUE; |
| 513 | |
| 514 | /* Save plc flags */ |
| 515 | ilbc_codec->plc_enabled = (attr->setting.plc != 0); |
| 516 | |
| 517 | /* Create silence detector. */ |
| 518 | ilbc_codec->vad_enabled = (attr->setting.vad != 0); |
| 519 | status = pjmedia_silence_det_create(ilbc_codec->pool, CLOCK_RATE, |
| 520 | ilbc_codec->enc_samples_per_frame, |
| 521 | &ilbc_codec->vad); |
| 522 | if (status != PJ_SUCCESS) |
| 523 | return status; |
| 524 | |
| 525 | /* Init last_tx (not necessary because of zalloc, but better |
| 526 | * be safe in case someone remove zalloc later. |
| 527 | */ |
| 528 | pj_set_timestamp32(&ilbc_codec->last_tx, 0, 0); |
| 529 | |
| 530 | PJ_LOG(5,(ilbc_codec->obj_name, |
| 531 | "iLBC codec opened, mode=%d", dec_fmtp_mode)); |
| 532 | |
| 533 | return PJ_SUCCESS; |
| 534 | } |
| 535 | |
| 536 | |
| 537 | /* |
| 538 | * Close codec. |
| 539 | */ |
| 540 | static pj_status_t ilbc_codec_close( pjmedia_codec *codec ) |
| 541 | { |
| 542 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 543 | |
| 544 | PJ_UNUSED_ARG(codec); |
| 545 | |
| 546 | PJ_LOG(5,(ilbc_codec->obj_name, "iLBC codec closed")); |
| 547 | |
| 548 | return PJ_SUCCESS; |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * Modify codec settings. |
| 553 | */ |
| 554 | static pj_status_t ilbc_codec_modify(pjmedia_codec *codec, |
| 555 | const pjmedia_codec_param *attr ) |
| 556 | { |
| 557 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 558 | |
| 559 | ilbc_codec->plc_enabled = (attr->setting.plc != 0); |
| 560 | ilbc_codec->vad_enabled = (attr->setting.vad != 0); |
| 561 | |
| 562 | return PJ_SUCCESS; |
| 563 | } |
| 564 | |
| 565 | /* |
| 566 | * Get frames in the packet. |
| 567 | */ |
| 568 | static pj_status_t ilbc_codec_parse( pjmedia_codec *codec, |
| 569 | void *pkt, |
| 570 | pj_size_t pkt_size, |
| 571 | const pj_timestamp *ts, |
| 572 | unsigned *frame_cnt, |
| 573 | pjmedia_frame frames[]) |
| 574 | { |
| 575 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 576 | unsigned count; |
| 577 | |
| 578 | PJ_ASSERT_RETURN(frame_cnt, PJ_EINVAL); |
| 579 | |
| 580 | count = 0; |
| 581 | while (pkt_size >= ilbc_codec->dec_frame_size && count < *frame_cnt) { |
| 582 | frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 583 | frames[count].buf = pkt; |
| 584 | frames[count].size = ilbc_codec->dec_frame_size; |
| 585 | frames[count].timestamp.u64 = ts->u64 + count * |
| 586 | ilbc_codec->dec_samples_per_frame; |
| 587 | |
| 588 | pkt = ((char*)pkt) + ilbc_codec->dec_frame_size; |
| 589 | pkt_size -= ilbc_codec->dec_frame_size; |
| 590 | |
| 591 | ++count; |
| 592 | } |
| 593 | |
| 594 | *frame_cnt = count; |
| 595 | return PJ_SUCCESS; |
| 596 | } |
| 597 | |
| 598 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 599 | static OSStatus encodeDataProc ( |
| 600 | AudioConverterRef inAudioConverter, |
| 601 | UInt32 *ioNumberDataPackets, |
| 602 | AudioBufferList *ioData, |
| 603 | AudioStreamPacketDescription **outDataPacketDescription, |
| 604 | void *inUserData |
| 605 | ) |
| 606 | { |
| 607 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)inUserData; |
| 608 | |
| 609 | /* Initialize in case of failure */ |
| 610 | ioData->mBuffers[0].mData = NULL; |
| 611 | ioData->mBuffers[0].mDataByteSize = 0; |
| 612 | |
| 613 | if (ilbc_codec->enc_total_packets < *ioNumberDataPackets) { |
| 614 | *ioNumberDataPackets = ilbc_codec->enc_total_packets; |
| 615 | } |
| 616 | |
| 617 | if (*ioNumberDataPackets) { |
| 618 | ioData->mBuffers[0].mData = ilbc_codec->enc_buffer + |
| 619 | ilbc_codec->enc_buffer_offset; |
| 620 | ioData->mBuffers[0].mDataByteSize = *ioNumberDataPackets * |
| 621 | ilbc_codec->enc_samples_per_frame |
| 622 | << 1; |
| 623 | ilbc_codec->enc_buffer_offset += ioData->mBuffers[0].mDataByteSize; |
| 624 | } |
| 625 | |
| 626 | ilbc_codec->enc_total_packets -= *ioNumberDataPackets; |
| 627 | return noErr; |
| 628 | } |
| 629 | |
| 630 | static OSStatus decodeDataProc ( |
| 631 | AudioConverterRef inAudioConverter, |
| 632 | UInt32 *ioNumberDataPackets, |
| 633 | AudioBufferList *ioData, |
| 634 | AudioStreamPacketDescription **outDataPacketDescription, |
| 635 | void *inUserData |
| 636 | ) |
| 637 | { |
| 638 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)inUserData; |
| 639 | |
| 640 | /* Initialize in case of failure */ |
| 641 | ioData->mBuffers[0].mData = NULL; |
| 642 | ioData->mBuffers[0].mDataByteSize = 0; |
| 643 | |
| 644 | if (ilbc_codec->dec_total_packets < *ioNumberDataPackets) { |
| 645 | *ioNumberDataPackets = ilbc_codec->dec_total_packets; |
| 646 | } |
| 647 | |
| 648 | if (*ioNumberDataPackets) { |
| 649 | ioData->mBuffers[0].mData = ilbc_codec->dec_buffer + |
| 650 | ilbc_codec->dec_buffer_offset; |
| 651 | ioData->mBuffers[0].mDataByteSize = *ioNumberDataPackets * |
| 652 | ilbc_codec->dec_frame_size; |
| 653 | ilbc_codec->dec_buffer_offset += ioData->mBuffers[0].mDataByteSize; |
| 654 | } |
| 655 | |
| 656 | ilbc_codec->dec_total_packets -= *ioNumberDataPackets; |
| 657 | return noErr; |
| 658 | } |
| 659 | #endif |
| 660 | |
| 661 | /* |
| 662 | * Encode frame. |
| 663 | */ |
| 664 | static pj_status_t ilbc_codec_encode(pjmedia_codec *codec, |
| 665 | const struct pjmedia_frame *input, |
| 666 | unsigned output_buf_len, |
| 667 | struct pjmedia_frame *output) |
| 668 | { |
| 669 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 670 | pj_int16_t *pcm_in; |
| 671 | pj_size_t nsamples; |
| 672 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 673 | UInt32 npackets; |
| 674 | OSStatus err; |
| 675 | AudioBufferList theABL; |
| 676 | #endif |
| 677 | |
| 678 | pj_assert(ilbc_codec && input && output); |
| 679 | |
| 680 | pcm_in = (pj_int16_t*)input->buf; |
| 681 | nsamples = input->size >> 1; |
| 682 | |
| 683 | PJ_ASSERT_RETURN(nsamples % ilbc_codec->enc_samples_per_frame == 0, |
| 684 | PJMEDIA_CODEC_EPCMFRMINLEN); |
| 685 | PJ_ASSERT_RETURN(output_buf_len >= ilbc_codec->enc_frame_size * nsamples / |
| 686 | ilbc_codec->enc_samples_per_frame, |
| 687 | PJMEDIA_CODEC_EFRMTOOSHORT); |
| 688 | |
| 689 | /* Detect silence */ |
| 690 | if (ilbc_codec->vad_enabled) { |
| 691 | pj_bool_t is_silence; |
| 692 | pj_int32_t silence_period; |
| 693 | |
| 694 | silence_period = pj_timestamp_diff32(&ilbc_codec->last_tx, |
| 695 | &input->timestamp); |
| 696 | |
| 697 | is_silence = pjmedia_silence_det_detect(ilbc_codec->vad, |
| 698 | (const pj_int16_t*)input->buf, |
| 699 | (input->size >> 1), |
| 700 | NULL); |
| 701 | if (is_silence && |
| 702 | (PJMEDIA_CODEC_MAX_SILENCE_PERIOD == -1 || |
| 703 | silence_period < PJMEDIA_CODEC_MAX_SILENCE_PERIOD*8000/1000)) |
| 704 | { |
| 705 | output->type = PJMEDIA_FRAME_TYPE_NONE; |
| 706 | output->buf = NULL; |
| 707 | output->size = 0; |
| 708 | output->timestamp = input->timestamp; |
| 709 | return PJ_SUCCESS; |
| 710 | } else { |
| 711 | ilbc_codec->last_tx = input->timestamp; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /* Encode */ |
| 716 | output->size = 0; |
| 717 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 718 | npackets = nsamples / ilbc_codec->enc_samples_per_frame; |
| 719 | |
| 720 | theABL.mNumberBuffers = 1; |
| 721 | theABL.mBuffers[0].mNumberChannels = 1; |
| 722 | theABL.mBuffers[0].mDataByteSize = output_buf_len; |
| 723 | theABL.mBuffers[0].mData = output->buf; |
| 724 | |
| 725 | ilbc_codec->enc_total_packets = npackets; |
| 726 | ilbc_codec->enc_buffer = (char *)input->buf; |
| 727 | ilbc_codec->enc_buffer_offset = 0; |
| 728 | |
| 729 | err = AudioConverterFillComplexBuffer(ilbc_codec->enc, encodeDataProc, |
| 730 | ilbc_codec, &npackets, |
| 731 | &theABL, NULL); |
| 732 | if (err == noErr) { |
| 733 | output->size = npackets * ilbc_codec->enc_frame_size; |
| 734 | } |
| 735 | #else |
| 736 | while (nsamples >= ilbc_codec->enc_samples_per_frame) { |
| 737 | unsigned i; |
| 738 | |
| 739 | /* Convert to float */ |
| 740 | for (i=0; i<ilbc_codec->enc_samples_per_frame; ++i) { |
| 741 | ilbc_codec->enc_block[i] = (float) (*pcm_in++); |
| 742 | } |
| 743 | |
| 744 | iLBC_encode((unsigned char *)output->buf + output->size, |
| 745 | ilbc_codec->enc_block, |
| 746 | &ilbc_codec->enc); |
| 747 | |
| 748 | output->size += ilbc_codec->enc.no_of_bytes; |
| 749 | nsamples -= ilbc_codec->enc_samples_per_frame; |
| 750 | } |
| 751 | #endif |
| 752 | |
| 753 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 754 | output->timestamp = input->timestamp; |
| 755 | |
| 756 | return PJ_SUCCESS; |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * Decode frame. |
| 761 | */ |
| 762 | static pj_status_t ilbc_codec_decode(pjmedia_codec *codec, |
| 763 | const struct pjmedia_frame *input, |
| 764 | unsigned output_buf_len, |
| 765 | struct pjmedia_frame *output) |
| 766 | { |
| 767 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 768 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 769 | UInt32 npackets; |
| 770 | OSStatus err; |
| 771 | AudioBufferList theABL; |
| 772 | #else |
| 773 | unsigned i; |
| 774 | #endif |
| 775 | |
| 776 | pj_assert(ilbc_codec != NULL); |
| 777 | PJ_ASSERT_RETURN(input && output, PJ_EINVAL); |
| 778 | |
| 779 | if (output_buf_len < (ilbc_codec->dec_samples_per_frame << 1)) |
| 780 | return PJMEDIA_CODEC_EPCMTOOSHORT; |
| 781 | |
| 782 | if (input->size != ilbc_codec->dec_frame_size) |
| 783 | return PJMEDIA_CODEC_EFRMINLEN; |
| 784 | |
| 785 | /* Decode to temporary buffer */ |
| 786 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 787 | npackets = input->size / ilbc_codec->dec_frame_size * |
| 788 | ilbc_codec->dec_samples_per_frame; |
| 789 | |
| 790 | theABL.mNumberBuffers = 1; |
| 791 | theABL.mBuffers[0].mNumberChannels = 1; |
| 792 | theABL.mBuffers[0].mDataByteSize = output_buf_len; |
| 793 | theABL.mBuffers[0].mData = output->buf; |
| 794 | |
| 795 | ilbc_codec->dec_total_packets = npackets; |
| 796 | ilbc_codec->dec_buffer = (char *)input->buf; |
| 797 | ilbc_codec->dec_buffer_offset = 0; |
| 798 | |
| 799 | err = AudioConverterFillComplexBuffer(ilbc_codec->dec, decodeDataProc, |
| 800 | ilbc_codec, &npackets, |
| 801 | &theABL, NULL); |
| 802 | if (err == noErr) { |
| 803 | output->size = npackets * (ilbc_codec->dec_samples_per_frame << 1); |
| 804 | } |
| 805 | #else |
| 806 | iLBC_decode(ilbc_codec->dec_block, (unsigned char*) input->buf, |
| 807 | &ilbc_codec->dec, 1); |
| 808 | |
| 809 | /* Convert decodec samples from float to short */ |
| 810 | for (i=0; i<ilbc_codec->dec_samples_per_frame; ++i) { |
| 811 | ((short*)output->buf)[i] = (short)ilbc_codec->dec_block[i]; |
| 812 | } |
| 813 | output->size = (ilbc_codec->dec_samples_per_frame << 1); |
| 814 | #endif |
| 815 | |
| 816 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 817 | output->timestamp = input->timestamp; |
| 818 | |
| 819 | return PJ_SUCCESS; |
| 820 | } |
| 821 | |
| 822 | |
| 823 | /* |
| 824 | * Recover lost frame. |
| 825 | */ |
| 826 | static pj_status_t ilbc_codec_recover(pjmedia_codec *codec, |
| 827 | unsigned output_buf_len, |
| 828 | struct pjmedia_frame *output) |
| 829 | { |
| 830 | struct ilbc_codec *ilbc_codec = (struct ilbc_codec*)codec; |
| 831 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 832 | UInt32 npackets; |
| 833 | OSStatus err; |
| 834 | AudioBufferList theABL; |
| 835 | #else |
| 836 | unsigned i; |
| 837 | #endif |
| 838 | |
| 839 | pj_assert(ilbc_codec != NULL); |
| 840 | PJ_ASSERT_RETURN(output, PJ_EINVAL); |
| 841 | |
| 842 | if (output_buf_len < (ilbc_codec->dec_samples_per_frame << 1)) |
| 843 | return PJMEDIA_CODEC_EPCMTOOSHORT; |
| 844 | |
| 845 | /* Decode to temporary buffer */ |
| 846 | #if defined(PJMEDIA_ILBC_CODEC_USE_COREAUDIO)&& PJMEDIA_ILBC_CODEC_USE_COREAUDIO |
| 847 | npackets = 1; |
| 848 | |
| 849 | theABL.mNumberBuffers = 1; |
| 850 | theABL.mBuffers[0].mNumberChannels = 1; |
| 851 | theABL.mBuffers[0].mDataByteSize = output_buf_len; |
| 852 | theABL.mBuffers[0].mData = output->buf; |
| 853 | |
| 854 | ilbc_codec->dec_total_packets = npackets; |
| 855 | ilbc_codec->dec_buffer_offset = 0; |
| 856 | if (ilbc_codec->dec_buffer) { |
| 857 | err = AudioConverterFillComplexBuffer(ilbc_codec->dec, decodeDataProc, |
| 858 | ilbc_codec, &npackets, |
| 859 | &theABL, NULL); |
| 860 | if (err == noErr) { |
| 861 | output->size = npackets * |
| 862 | (ilbc_codec->dec_samples_per_frame << 1); |
| 863 | } |
| 864 | } else { |
| 865 | output->size = npackets * (ilbc_codec->dec_samples_per_frame << 1); |
| 866 | pj_bzero(output->buf, output->size); |
| 867 | } |
| 868 | #else |
| 869 | iLBC_decode(ilbc_codec->dec_block, NULL, &ilbc_codec->dec, 0); |
| 870 | |
| 871 | /* Convert decodec samples from float to short */ |
| 872 | for (i=0; i<ilbc_codec->dec_samples_per_frame; ++i) { |
| 873 | ((short*)output->buf)[i] = (short)ilbc_codec->dec_block[i]; |
| 874 | } |
| 875 | output->size = (ilbc_codec->dec_samples_per_frame << 1); |
| 876 | #endif |
| 877 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 878 | |
| 879 | return PJ_SUCCESS; |
| 880 | } |
| 881 | |
| 882 | |
| 883 | #endif /* PJMEDIA_HAS_ILBC_CODEC */ |