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/g7221.h> |
| 21 | #include <pjmedia-codec/g7221_sdp_match.h> |
| 22 | #include <pjmedia/codec.h> |
| 23 | #include <pjmedia/errno.h> |
| 24 | #include <pjmedia/endpoint.h> |
| 25 | #include <pjmedia/port.h> |
| 26 | #include <pjmedia/silencedet.h> |
| 27 | #include <pj/assert.h> |
| 28 | #include <pj/log.h> |
| 29 | #include <pj/math.h> |
| 30 | #include <pj/pool.h> |
| 31 | #include <pj/string.h> |
| 32 | #include <pj/os.h> |
| 33 | |
| 34 | /* |
| 35 | * Only build this file if PJMEDIA_HAS_G7221_CODEC != 0 |
| 36 | */ |
| 37 | #if defined(PJMEDIA_HAS_G7221_CODEC) && PJMEDIA_HAS_G7221_CODEC!=0 |
| 38 | |
| 39 | #include "../../../third_party/g7221/common/defs.h" |
| 40 | |
| 41 | #define THIS_FILE "g7221.c" |
| 42 | |
| 43 | /* Codec tag, it is the SDP encoding name and also MIME subtype name */ |
| 44 | #define CODEC_TAG "G7221" |
| 45 | |
| 46 | /* Sampling rates definition */ |
| 47 | #define WB_SAMPLE_RATE 16000 |
| 48 | #define UWB_SAMPLE_RATE 32000 |
| 49 | |
| 50 | /* Maximum number of samples per frame. */ |
| 51 | #define MAX_SAMPLES_PER_FRAME (UWB_SAMPLE_RATE * 20 / 1000) |
| 52 | |
| 53 | /* Maximum number of codec params. */ |
| 54 | #define MAX_CODEC_MODES 8 |
| 55 | #define START_RSV_MODES_IDX 6 |
| 56 | |
| 57 | |
| 58 | /* Prototypes for G722.1 codec factory */ |
| 59 | static pj_status_t test_alloc( pjmedia_codec_factory *factory, |
| 60 | const pjmedia_codec_info *id ); |
| 61 | static pj_status_t default_attr( pjmedia_codec_factory *factory, |
| 62 | const pjmedia_codec_info *id, |
| 63 | pjmedia_codec_param *attr ); |
| 64 | static pj_status_t enum_codecs( pjmedia_codec_factory *factory, |
| 65 | unsigned *count, |
| 66 | pjmedia_codec_info codecs[]); |
| 67 | static pj_status_t alloc_codec( pjmedia_codec_factory *factory, |
| 68 | const pjmedia_codec_info *id, |
| 69 | pjmedia_codec **p_codec); |
| 70 | static pj_status_t dealloc_codec( pjmedia_codec_factory *factory, |
| 71 | pjmedia_codec *codec ); |
| 72 | |
| 73 | /* Prototypes for G722.1 codec implementation. */ |
| 74 | static pj_status_t codec_init( pjmedia_codec *codec, |
| 75 | pj_pool_t *pool ); |
| 76 | static pj_status_t codec_open( pjmedia_codec *codec, |
| 77 | pjmedia_codec_param *attr ); |
| 78 | static pj_status_t codec_close( pjmedia_codec *codec ); |
| 79 | static pj_status_t codec_modify(pjmedia_codec *codec, |
| 80 | const pjmedia_codec_param *attr ); |
| 81 | static pj_status_t codec_parse( pjmedia_codec *codec, |
| 82 | void *pkt, |
| 83 | pj_size_t pkt_size, |
| 84 | const pj_timestamp *ts, |
| 85 | unsigned *frame_cnt, |
| 86 | pjmedia_frame frames[]); |
| 87 | static pj_status_t codec_encode( pjmedia_codec *codec, |
| 88 | const struct pjmedia_frame *input, |
| 89 | unsigned output_buf_len, |
| 90 | struct pjmedia_frame *output); |
| 91 | static pj_status_t codec_decode( pjmedia_codec *codec, |
| 92 | const struct pjmedia_frame *input, |
| 93 | unsigned output_buf_len, |
| 94 | struct pjmedia_frame *output); |
| 95 | static pj_status_t codec_recover( pjmedia_codec *codec, |
| 96 | unsigned output_buf_len, |
| 97 | struct pjmedia_frame *output); |
| 98 | |
| 99 | /* Definition for G722.1 codec operations. */ |
| 100 | static pjmedia_codec_op codec_op = |
| 101 | { |
| 102 | &codec_init, |
| 103 | &codec_open, |
| 104 | &codec_close, |
| 105 | &codec_modify, |
| 106 | &codec_parse, |
| 107 | &codec_encode, |
| 108 | &codec_decode, |
| 109 | &codec_recover |
| 110 | }; |
| 111 | |
| 112 | /* Definition for G722.1 codec factory operations. */ |
| 113 | static pjmedia_codec_factory_op codec_factory_op = |
| 114 | { |
| 115 | &test_alloc, |
| 116 | &default_attr, |
| 117 | &enum_codecs, |
| 118 | &alloc_codec, |
| 119 | &dealloc_codec, |
| 120 | &pjmedia_codec_g7221_deinit |
| 121 | }; |
| 122 | |
| 123 | |
| 124 | /* Structure of G722.1 mode */ |
| 125 | typedef struct codec_mode |
| 126 | { |
| 127 | pj_bool_t enabled; /* Is this mode enabled? */ |
| 128 | pj_uint8_t pt; /* Payload type. */ |
| 129 | unsigned sample_rate; /* Default sampling rate to be used.*/ |
| 130 | unsigned bitrate; /* Bitrate. */ |
| 131 | char bitrate_str[8]; /* Bitrate in string. */ |
| 132 | } codec_mode; |
| 133 | |
| 134 | |
| 135 | /* G722.1 codec factory */ |
| 136 | static struct codec_factory { |
| 137 | pjmedia_codec_factory base; /**< Base class. */ |
| 138 | pjmedia_endpt *endpt; /**< PJMEDIA endpoint instance. */ |
| 139 | pj_pool_t *pool; /**< Codec factory pool. */ |
| 140 | pj_mutex_t *mutex; /**< Codec factory mutex. */ |
| 141 | |
| 142 | int pcm_shift; /**< Level adjustment */ |
| 143 | unsigned mode_count; /**< Number of G722.1 modes. */ |
| 144 | codec_mode modes[MAX_CODEC_MODES]; /**< The G722.1 modes. */ |
| 145 | unsigned mode_rsv_start;/**< Start index of G722.1 non- |
| 146 | standard modes, currently |
| 147 | there can only be up to two |
| 148 | non-standard modes enabled |
| 149 | at the same time. */ |
| 150 | } codec_factory; |
| 151 | |
| 152 | /* G722.1 codec private data. */ |
| 153 | typedef struct codec_private { |
| 154 | pj_pool_t *pool; /**< Pool for each instance. */ |
| 155 | pj_bool_t plc_enabled; /**< PLC enabled? */ |
| 156 | pj_bool_t vad_enabled; /**< VAD enabled? */ |
| 157 | pjmedia_silence_det *vad; /**< PJMEDIA VAD instance. */ |
| 158 | pj_timestamp last_tx; /**< Timestamp of last transmit.*/ |
| 159 | |
| 160 | /* ITU ref implementation seems to leave the codec engine states to be |
| 161 | * managed by the application, so here we go. |
| 162 | */ |
| 163 | |
| 164 | /* Common engine state */ |
| 165 | pj_uint16_t samples_per_frame; /**< Samples per frame. */ |
| 166 | pj_uint16_t bitrate; /**< Coded stream bitrate. */ |
| 167 | pj_uint16_t frame_size; /**< Coded frame size. */ |
| 168 | pj_uint16_t frame_size_bits; /**< Coded frame size in bits. */ |
| 169 | pj_uint16_t number_of_regions; /**< Number of regions. */ |
| 170 | int pcm_shift; /**< Adjustment for PCM in/out */ |
| 171 | |
| 172 | /* Encoder specific state */ |
| 173 | Word16 *enc_frame; /**< 16bit to 14bit buffer */ |
| 174 | Word16 *enc_old_frame; |
| 175 | |
| 176 | /* Decoder specific state */ |
| 177 | Word16 *dec_old_frame; |
| 178 | Rand_Obj dec_randobj; |
| 179 | Word16 dec_old_mag_shift; |
| 180 | Word16 *dec_old_mlt_coefs; |
| 181 | } codec_private_t; |
| 182 | |
| 183 | /* |
| 184 | * Helper function for looking up mode based on payload type. |
| 185 | */ |
| 186 | static codec_mode* lookup_mode(unsigned pt) |
| 187 | { |
| 188 | codec_mode* mode = NULL; |
| 189 | unsigned i; |
| 190 | |
| 191 | for (i = 0; i < codec_factory.mode_count; ++i) { |
| 192 | mode = &codec_factory.modes[i]; |
| 193 | if (mode->pt == pt) |
| 194 | break; |
| 195 | } |
| 196 | |
| 197 | return mode; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Helper function to validate G722.1 mode. Valid modes are defined as: |
| 202 | * 1. sample rate must be 16kHz or 32kHz, |
| 203 | * 2. bitrate: |
| 204 | * - for sampling rate 16kHz: 16000 to 32000 bps, it must be a multiple |
| 205 | * of 400 (to keep RTP payload octed-aligned) |
| 206 | * - for sampling rate 32kHz: 24000 to 48000 bps, it must be a multiple |
| 207 | * of 400 (to keep RTP payload octed-aligned) |
| 208 | */ |
| 209 | static pj_bool_t validate_mode(unsigned sample_rate, unsigned bitrate) |
| 210 | { |
| 211 | if (sample_rate == WB_SAMPLE_RATE) { |
| 212 | if (bitrate < 16000 || bitrate > 32000 || |
| 213 | ((bitrate-16000) % 400 != 0)) |
| 214 | { |
| 215 | return PJ_FALSE; |
| 216 | } |
| 217 | } else if (sample_rate == UWB_SAMPLE_RATE) { |
| 218 | if (bitrate < 24000 || bitrate > 48000 || |
| 219 | ((bitrate-24000) % 400 != 0)) |
| 220 | { |
| 221 | return PJ_FALSE; |
| 222 | } |
| 223 | } else { |
| 224 | return PJ_FALSE; |
| 225 | } |
| 226 | |
| 227 | return PJ_TRUE; |
| 228 | } |
| 229 | |
| 230 | #if defined(PJ_IS_LITTLE_ENDIAN) && PJ_IS_LITTLE_ENDIAN!=0 |
| 231 | PJ_INLINE(void) swap_bytes(pj_uint16_t *buf, unsigned count) |
| 232 | { |
| 233 | pj_uint16_t *end = buf + count; |
| 234 | while (buf != end) { |
| 235 | *buf = (pj_uint16_t)((*buf << 8) | (*buf >> 8)); |
| 236 | ++buf; |
| 237 | } |
| 238 | } |
| 239 | #else |
| 240 | #define swap_bytes(buf, count) |
| 241 | #endif |
| 242 | |
| 243 | /* |
| 244 | * Initialize and register G722.1 codec factory to pjmedia endpoint. |
| 245 | */ |
| 246 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_init( pjmedia_endpt *endpt ) |
| 247 | { |
| 248 | pjmedia_codec_mgr *codec_mgr; |
| 249 | codec_mode *mode; |
| 250 | pj_str_t codec_name; |
| 251 | pj_status_t status; |
| 252 | |
| 253 | if (codec_factory.pool != NULL) { |
| 254 | /* Already initialized. */ |
| 255 | return PJ_SUCCESS; |
| 256 | } |
| 257 | |
| 258 | /* Initialize codec modes, by default all standard bitrates are enabled */ |
| 259 | codec_factory.mode_count = 0; |
| 260 | codec_factory.pcm_shift = PJMEDIA_G7221_DEFAULT_PCM_SHIFT; |
| 261 | |
| 262 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 263 | mode->enabled = PJ_TRUE; |
| 264 | mode->pt = PJMEDIA_RTP_PT_G722_1_24; |
| 265 | mode->sample_rate = WB_SAMPLE_RATE; |
| 266 | mode->bitrate = 24000; |
| 267 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 268 | |
| 269 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 270 | mode->enabled = PJ_TRUE; |
| 271 | mode->pt = PJMEDIA_RTP_PT_G722_1_32; |
| 272 | mode->sample_rate = WB_SAMPLE_RATE; |
| 273 | mode->bitrate = 32000; |
| 274 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 275 | |
| 276 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 277 | mode->enabled = PJ_TRUE; |
| 278 | mode->pt = PJMEDIA_RTP_PT_G7221C_24; |
| 279 | mode->sample_rate = UWB_SAMPLE_RATE; |
| 280 | mode->bitrate = 24000; |
| 281 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 282 | |
| 283 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 284 | mode->enabled = PJ_TRUE; |
| 285 | mode->pt = PJMEDIA_RTP_PT_G7221C_32; |
| 286 | mode->sample_rate = UWB_SAMPLE_RATE; |
| 287 | mode->bitrate = 32000; |
| 288 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 289 | |
| 290 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 291 | mode->enabled = PJ_TRUE; |
| 292 | mode->pt = PJMEDIA_RTP_PT_G7221C_48; |
| 293 | mode->sample_rate = UWB_SAMPLE_RATE; |
| 294 | mode->bitrate = 48000; |
| 295 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 296 | |
| 297 | /* Non-standard bitrates */ |
| 298 | |
| 299 | /* Bitrate 16kbps is non-standard but rather commonly used. */ |
| 300 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 301 | mode->enabled = PJ_FALSE; |
| 302 | mode->pt = PJMEDIA_RTP_PT_G722_1_16; |
| 303 | mode->sample_rate = WB_SAMPLE_RATE; |
| 304 | mode->bitrate = 16000; |
| 305 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 306 | |
| 307 | /* Reserved two modes for non-standard bitrates */ |
| 308 | codec_factory.mode_rsv_start = codec_factory.mode_count; |
| 309 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 310 | mode->enabled = PJ_FALSE; |
| 311 | mode->pt = PJMEDIA_RTP_PT_G7221_RSV1; |
| 312 | |
| 313 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 314 | mode->enabled = PJ_FALSE; |
| 315 | mode->pt = PJMEDIA_RTP_PT_G7221_RSV2; |
| 316 | |
| 317 | pj_assert(codec_factory.mode_count <= MAX_CODEC_MODES); |
| 318 | |
| 319 | /* Create G722.1 codec factory. */ |
| 320 | codec_factory.base.op = &codec_factory_op; |
| 321 | codec_factory.base.factory_data = NULL; |
| 322 | codec_factory.endpt = endpt; |
| 323 | |
| 324 | codec_factory.pool = pjmedia_endpt_create_pool(endpt, "G722.1 codec", |
| 325 | 4000, 4000); |
| 326 | if (!codec_factory.pool) |
| 327 | return PJ_ENOMEM; |
| 328 | |
| 329 | /* Create mutex. */ |
| 330 | status = pj_mutex_create_simple(codec_factory.pool, "G722.1 codec", |
| 331 | &codec_factory.mutex); |
| 332 | if (status != PJ_SUCCESS) |
| 333 | goto on_error; |
| 334 | |
| 335 | /* Get the codec manager. */ |
| 336 | codec_mgr = pjmedia_endpt_get_codec_mgr(endpt); |
| 337 | if (!codec_mgr) { |
| 338 | status = PJ_EINVALIDOP; |
| 339 | goto on_error; |
| 340 | } |
| 341 | |
| 342 | /* Register format match callback. */ |
| 343 | pj_cstr(&codec_name, CODEC_TAG); |
| 344 | status = pjmedia_sdp_neg_register_fmt_match_cb( |
| 345 | &codec_name, |
| 346 | &pjmedia_codec_g7221_match_sdp); |
| 347 | if (status != PJ_SUCCESS) |
| 348 | goto on_error; |
| 349 | |
| 350 | /* Register codec factory to endpoint. */ |
| 351 | status = pjmedia_codec_mgr_register_factory(codec_mgr, |
| 352 | &codec_factory.base); |
| 353 | if (status != PJ_SUCCESS) |
| 354 | goto on_error; |
| 355 | |
| 356 | /* Done. */ |
| 357 | return PJ_SUCCESS; |
| 358 | |
| 359 | on_error: |
| 360 | if (codec_factory.mutex) { |
| 361 | pj_mutex_destroy(codec_factory.mutex); |
| 362 | codec_factory.mutex = NULL; |
| 363 | } |
| 364 | |
| 365 | pj_pool_release(codec_factory.pool); |
| 366 | codec_factory.pool = NULL; |
| 367 | return status; |
| 368 | } |
| 369 | |
| 370 | |
| 371 | /** |
| 372 | * Enable and disable G722.1 modes, including non-standard modes. |
| 373 | */ |
| 374 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_set_mode(unsigned sample_rate, |
| 375 | unsigned bitrate, |
| 376 | pj_bool_t enabled) |
| 377 | { |
| 378 | unsigned i; |
| 379 | |
| 380 | /* Validate mode */ |
| 381 | if (!validate_mode(sample_rate, bitrate)) |
| 382 | return PJMEDIA_CODEC_EINMODE; |
| 383 | |
| 384 | /* Look up in factory modes table */ |
| 385 | for (i = 0; i < codec_factory.mode_count; ++i) { |
| 386 | if (codec_factory.modes[i].sample_rate == sample_rate && |
| 387 | codec_factory.modes[i].bitrate == bitrate) |
| 388 | { |
| 389 | codec_factory.modes[i].enabled = enabled; |
| 390 | return PJ_SUCCESS; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | /* Mode not found in modes table, this may be a request to enable |
| 395 | * a non-standard G722.1 mode. |
| 396 | */ |
| 397 | |
| 398 | /* Non-standard mode need to be initialized first before user |
| 399 | * can disable it. |
| 400 | */ |
| 401 | if (!enabled) |
| 402 | return PJ_ENOTFOUND; |
| 403 | |
| 404 | /* Initialize a non-standard mode, look for available space. */ |
| 405 | for (i = codec_factory.mode_rsv_start; |
| 406 | i < codec_factory.mode_count; ++i) |
| 407 | { |
| 408 | if (!codec_factory.modes[i].enabled) |
| 409 | { |
| 410 | codec_mode *mode = &codec_factory.modes[i]; |
| 411 | mode->enabled = PJ_TRUE; |
| 412 | mode->sample_rate = sample_rate; |
| 413 | mode->bitrate = bitrate; |
| 414 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 415 | |
| 416 | return PJ_SUCCESS; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | /* No space for non-standard mode. */ |
| 421 | return PJ_ETOOMANY; |
| 422 | } |
| 423 | |
| 424 | |
| 425 | /* |
| 426 | * Set level adjustment. |
| 427 | */ |
| 428 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_set_pcm_shift(int val) |
| 429 | { |
| 430 | codec_factory.pcm_shift = val; |
| 431 | return PJ_SUCCESS; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Unregister G722.1 codec factory from pjmedia endpoint. |
| 436 | */ |
| 437 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_deinit(void) |
| 438 | { |
| 439 | pjmedia_codec_mgr *codec_mgr; |
| 440 | pj_status_t status; |
| 441 | |
| 442 | if (codec_factory.pool == NULL) { |
| 443 | /* Already deinitialized */ |
| 444 | return PJ_SUCCESS; |
| 445 | } |
| 446 | |
| 447 | pj_mutex_lock(codec_factory.mutex); |
| 448 | |
| 449 | /* Get the codec manager. */ |
| 450 | codec_mgr = pjmedia_endpt_get_codec_mgr(codec_factory.endpt); |
| 451 | if (!codec_mgr) { |
| 452 | pj_pool_release(codec_factory.pool); |
| 453 | codec_factory.pool = NULL; |
| 454 | return PJ_EINVALIDOP; |
| 455 | } |
| 456 | |
| 457 | /* Unregister G722.1 codec factory. */ |
| 458 | status = pjmedia_codec_mgr_unregister_factory(codec_mgr, |
| 459 | &codec_factory.base); |
| 460 | |
| 461 | /* Destroy mutex. */ |
| 462 | pj_mutex_destroy(codec_factory.mutex); |
| 463 | |
| 464 | /* Destroy pool. */ |
| 465 | pj_pool_release(codec_factory.pool); |
| 466 | codec_factory.pool = NULL; |
| 467 | |
| 468 | return status; |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Check if factory can allocate the specified codec. |
| 473 | */ |
| 474 | static pj_status_t test_alloc( pjmedia_codec_factory *factory, |
| 475 | const pjmedia_codec_info *info ) |
| 476 | { |
| 477 | PJ_UNUSED_ARG(factory); |
| 478 | |
| 479 | /* Type MUST be audio. */ |
| 480 | if (info->type != PJMEDIA_TYPE_AUDIO) |
| 481 | return PJMEDIA_CODEC_EUNSUP; |
| 482 | |
| 483 | /* Check encoding name. */ |
| 484 | if (pj_stricmp2(&info->encoding_name, CODEC_TAG) != 0) |
| 485 | return PJMEDIA_CODEC_EUNSUP; |
| 486 | |
| 487 | /* Check clock-rate */ |
| 488 | if (info->clock_rate != WB_SAMPLE_RATE && |
| 489 | info->clock_rate != UWB_SAMPLE_RATE) |
| 490 | { |
| 491 | return PJMEDIA_CODEC_EUNSUP; |
| 492 | } |
| 493 | |
| 494 | return PJ_SUCCESS; |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * Generate default attribute. |
| 499 | */ |
| 500 | static pj_status_t default_attr ( pjmedia_codec_factory *factory, |
| 501 | const pjmedia_codec_info *id, |
| 502 | pjmedia_codec_param *attr ) |
| 503 | { |
| 504 | codec_mode *mode; |
| 505 | |
| 506 | PJ_ASSERT_RETURN(factory==&codec_factory.base, PJ_EINVAL); |
| 507 | |
| 508 | pj_bzero(attr, sizeof(pjmedia_codec_param)); |
| 509 | |
| 510 | mode = lookup_mode(id->pt); |
| 511 | if (mode == NULL || !mode->enabled) |
| 512 | return PJMEDIA_CODEC_EUNSUP; |
| 513 | |
| 514 | attr->info.pt = (pj_uint8_t)id->pt; |
| 515 | attr->info.channel_cnt = 1; |
| 516 | attr->info.clock_rate = mode->sample_rate; |
| 517 | attr->info.max_bps = mode->bitrate; |
| 518 | attr->info.avg_bps = mode->bitrate; |
| 519 | attr->info.pcm_bits_per_sample = 16; |
| 520 | attr->info.frm_ptime = 20; |
| 521 | |
| 522 | /* Default flags. */ |
| 523 | attr->setting.plc = 1; |
| 524 | attr->setting.vad = 0; |
| 525 | attr->setting.frm_per_pkt = 1; |
| 526 | |
| 527 | /* Default FMTP setting */ |
| 528 | attr->setting.dec_fmtp.cnt = 1; |
| 529 | attr->setting.dec_fmtp.param[0].name = pj_str("bitrate"); |
| 530 | attr->setting.dec_fmtp.param[0].val = pj_str(mode->bitrate_str); |
| 531 | |
| 532 | return PJ_SUCCESS; |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | * Enum codecs supported by this factory. |
| 537 | */ |
| 538 | static pj_status_t enum_codecs( pjmedia_codec_factory *factory, |
| 539 | unsigned *count, |
| 540 | pjmedia_codec_info codecs[]) |
| 541 | { |
| 542 | unsigned i, max_cnt; |
| 543 | |
| 544 | PJ_ASSERT_RETURN(factory==&codec_factory.base, PJ_EINVAL); |
| 545 | PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL); |
| 546 | |
| 547 | max_cnt = *count; |
| 548 | *count = 0; |
| 549 | |
| 550 | for (i=0; (i < codec_factory.mode_count) && (*count < max_cnt); ++i) |
| 551 | { |
| 552 | if (!codec_factory.modes[i].enabled) |
| 553 | continue; |
| 554 | |
| 555 | pj_bzero(&codecs[*count], sizeof(pjmedia_codec_info)); |
| 556 | codecs[*count].encoding_name = pj_str((char*)CODEC_TAG); |
| 557 | codecs[*count].pt = codec_factory.modes[i].pt; |
| 558 | codecs[*count].type = PJMEDIA_TYPE_AUDIO; |
| 559 | codecs[*count].clock_rate = codec_factory.modes[i].sample_rate; |
| 560 | codecs[*count].channel_cnt = 1; |
| 561 | |
| 562 | ++ *count; |
| 563 | } |
| 564 | |
| 565 | return PJ_SUCCESS; |
| 566 | } |
| 567 | |
| 568 | /* |
| 569 | * Allocate a new codec instance. |
| 570 | */ |
| 571 | static pj_status_t alloc_codec( pjmedia_codec_factory *factory, |
| 572 | const pjmedia_codec_info *id, |
| 573 | pjmedia_codec **p_codec) |
| 574 | { |
| 575 | codec_private_t *codec_data; |
| 576 | pjmedia_codec *codec; |
| 577 | pj_pool_t *pool; |
| 578 | pj_status_t status; |
| 579 | |
| 580 | PJ_ASSERT_RETURN(factory && id && p_codec, PJ_EINVAL); |
| 581 | PJ_ASSERT_RETURN(factory == &codec_factory.base, PJ_EINVAL); |
| 582 | |
| 583 | pj_mutex_lock(codec_factory.mutex); |
| 584 | |
| 585 | /* Create pool for codec instance */ |
| 586 | pool = pjmedia_endpt_create_pool(codec_factory.endpt, "G7221", 512, 512); |
| 587 | codec = PJ_POOL_ZALLOC_T(pool, pjmedia_codec); |
| 588 | codec->op = &codec_op; |
| 589 | codec->factory = factory; |
| 590 | codec->codec_data = PJ_POOL_ZALLOC_T(pool, codec_private_t); |
| 591 | codec_data = (codec_private_t*) codec->codec_data; |
| 592 | codec_data->pool = pool; |
| 593 | |
| 594 | /* Create silence detector */ |
| 595 | status = pjmedia_silence_det_create(pool, id->clock_rate, |
| 596 | id->clock_rate * 20 / 1000, |
| 597 | &codec_data->vad); |
| 598 | if (status != PJ_SUCCESS) { |
| 599 | pj_mutex_unlock(codec_factory.mutex); |
| 600 | return status; |
| 601 | } |
| 602 | |
| 603 | pj_mutex_unlock(codec_factory.mutex); |
| 604 | |
| 605 | *p_codec = codec; |
| 606 | return PJ_SUCCESS; |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * Free codec. |
| 611 | */ |
| 612 | static pj_status_t dealloc_codec( pjmedia_codec_factory *factory, |
| 613 | pjmedia_codec *codec ) |
| 614 | { |
| 615 | codec_private_t *codec_data; |
| 616 | pj_pool_t *pool; |
| 617 | |
| 618 | PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); |
| 619 | PJ_ASSERT_RETURN(factory == &codec_factory.base, PJ_EINVAL); |
| 620 | |
| 621 | /* Close codec, if it's not closed. */ |
| 622 | codec_data = (codec_private_t*) codec->codec_data; |
| 623 | pool = codec_data->pool; |
| 624 | codec_close(codec); |
| 625 | |
| 626 | /* Release codec pool */ |
| 627 | pj_pool_release(pool); |
| 628 | |
| 629 | return PJ_SUCCESS; |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * Init codec. |
| 634 | */ |
| 635 | static pj_status_t codec_init( pjmedia_codec *codec, |
| 636 | pj_pool_t *pool ) |
| 637 | { |
| 638 | PJ_UNUSED_ARG(codec); |
| 639 | PJ_UNUSED_ARG(pool); |
| 640 | return PJ_SUCCESS; |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | * Open codec. |
| 645 | */ |
| 646 | static pj_status_t codec_open( pjmedia_codec *codec, |
| 647 | pjmedia_codec_param *attr ) |
| 648 | { |
| 649 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 650 | pj_pool_t *pool; |
| 651 | unsigned tmp; |
| 652 | |
| 653 | /* Validation mode first! */ |
| 654 | if (!validate_mode(attr->info.clock_rate, attr->info.avg_bps)) |
| 655 | return PJMEDIA_CODEC_EINMODE; |
| 656 | |
| 657 | pool = codec_data->pool; |
| 658 | |
| 659 | /* Initialize common state */ |
| 660 | codec_data->vad_enabled = (attr->setting.vad != 0); |
| 661 | codec_data->plc_enabled = (attr->setting.plc != 0); |
| 662 | |
| 663 | codec_data->bitrate = (pj_uint16_t)attr->info.avg_bps; |
| 664 | codec_data->frame_size_bits = (pj_uint16_t)(attr->info.avg_bps*20/1000); |
| 665 | codec_data->frame_size = (pj_uint16_t)(codec_data->frame_size_bits>>3); |
| 666 | codec_data->samples_per_frame = (pj_uint16_t) |
| 667 | (attr->info.clock_rate*20/1000); |
| 668 | codec_data->number_of_regions = (pj_uint16_t) |
| 669 | (attr->info.clock_rate <= WB_SAMPLE_RATE? |
| 670 | NUMBER_OF_REGIONS:MAX_NUMBER_OF_REGIONS); |
| 671 | codec_data->pcm_shift = codec_factory.pcm_shift; |
| 672 | |
| 673 | /* Initialize encoder state */ |
| 674 | tmp = codec_data->samples_per_frame << 1; |
| 675 | codec_data->enc_old_frame = (Word16*)pj_pool_zalloc(pool, tmp); |
| 676 | codec_data->enc_frame = (Word16*)pj_pool_alloc(pool, tmp); |
| 677 | |
| 678 | /* Initialize decoder state */ |
| 679 | tmp = codec_data->samples_per_frame; |
| 680 | codec_data->dec_old_frame = (Word16*)pj_pool_zalloc(pool, tmp); |
| 681 | |
| 682 | tmp = codec_data->samples_per_frame << 1; |
| 683 | codec_data->dec_old_mlt_coefs = (Word16*)pj_pool_zalloc(pool, tmp); |
| 684 | |
| 685 | codec_data->dec_randobj.seed0 = 1; |
| 686 | codec_data->dec_randobj.seed1 = 1; |
| 687 | codec_data->dec_randobj.seed2 = 1; |
| 688 | codec_data->dec_randobj.seed3 = 1; |
| 689 | |
| 690 | return PJ_SUCCESS; |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Close codec. |
| 695 | */ |
| 696 | static pj_status_t codec_close( pjmedia_codec *codec ) |
| 697 | { |
| 698 | PJ_UNUSED_ARG(codec); |
| 699 | |
| 700 | return PJ_SUCCESS; |
| 701 | } |
| 702 | |
| 703 | |
| 704 | /* |
| 705 | * Modify codec settings. |
| 706 | */ |
| 707 | static pj_status_t codec_modify( pjmedia_codec *codec, |
| 708 | const pjmedia_codec_param *attr ) |
| 709 | { |
| 710 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 711 | |
| 712 | codec_data->vad_enabled = (attr->setting.vad != 0); |
| 713 | codec_data->plc_enabled = (attr->setting.plc != 0); |
| 714 | |
| 715 | return PJ_SUCCESS; |
| 716 | } |
| 717 | |
| 718 | /* |
| 719 | * Get frames in the packet. |
| 720 | */ |
| 721 | static pj_status_t codec_parse( pjmedia_codec *codec, |
| 722 | void *pkt, |
| 723 | pj_size_t pkt_size, |
| 724 | const pj_timestamp *ts, |
| 725 | unsigned *frame_cnt, |
| 726 | pjmedia_frame frames[]) |
| 727 | { |
| 728 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 729 | unsigned count = 0; |
| 730 | |
| 731 | PJ_ASSERT_RETURN(frame_cnt, PJ_EINVAL); |
| 732 | |
| 733 | /* Parse based on fixed frame size. */ |
| 734 | while (pkt_size >= codec_data->frame_size && count < *frame_cnt) { |
| 735 | frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 736 | frames[count].buf = pkt; |
| 737 | frames[count].size = codec_data->frame_size; |
| 738 | frames[count].timestamp.u64 = ts->u64 + |
| 739 | count * codec_data->samples_per_frame; |
| 740 | |
| 741 | pkt = (pj_uint8_t*)pkt + codec_data->frame_size; |
| 742 | pkt_size -= codec_data->frame_size; |
| 743 | |
| 744 | ++count; |
| 745 | } |
| 746 | |
| 747 | pj_assert(pkt_size == 0); |
| 748 | *frame_cnt = count; |
| 749 | |
| 750 | return PJ_SUCCESS; |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * Encode frames. |
| 755 | */ |
| 756 | static pj_status_t codec_encode( pjmedia_codec *codec, |
| 757 | const struct pjmedia_frame *input, |
| 758 | unsigned output_buf_len, |
| 759 | struct pjmedia_frame *output) |
| 760 | { |
| 761 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 762 | unsigned nsamples, processed; |
| 763 | |
| 764 | /* Check frame in & out size */ |
| 765 | nsamples = input->size >> 1; |
| 766 | PJ_ASSERT_RETURN(nsamples % codec_data->samples_per_frame == 0, |
| 767 | PJMEDIA_CODEC_EPCMFRMINLEN); |
| 768 | PJ_ASSERT_RETURN(output_buf_len >= codec_data->frame_size * nsamples / |
| 769 | codec_data->samples_per_frame, |
| 770 | PJMEDIA_CODEC_EFRMTOOSHORT); |
| 771 | |
| 772 | /* Apply silence detection if VAD is enabled */ |
| 773 | if (codec_data->vad_enabled) { |
| 774 | pj_bool_t is_silence; |
| 775 | pj_int32_t silence_duration; |
| 776 | |
| 777 | pj_assert(codec_data->vad); |
| 778 | |
| 779 | silence_duration = pj_timestamp_diff32(&codec_data->last_tx, |
| 780 | &input->timestamp); |
| 781 | |
| 782 | is_silence = pjmedia_silence_det_detect(codec_data->vad, |
| 783 | (const pj_int16_t*) input->buf, |
| 784 | (input->size >> 1), |
| 785 | NULL); |
| 786 | if (is_silence && |
| 787 | (PJMEDIA_CODEC_MAX_SILENCE_PERIOD == -1 || |
| 788 | silence_duration < (PJMEDIA_CODEC_MAX_SILENCE_PERIOD * |
| 789 | (int)codec_data->samples_per_frame / 20))) |
| 790 | { |
| 791 | output->type = PJMEDIA_FRAME_TYPE_NONE; |
| 792 | output->buf = NULL; |
| 793 | output->size = 0; |
| 794 | output->timestamp = input->timestamp; |
| 795 | return PJ_SUCCESS; |
| 796 | } else { |
| 797 | codec_data->last_tx = input->timestamp; |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | processed = 0; |
| 802 | output->size = 0; |
| 803 | while (processed < nsamples) { |
| 804 | Word16 mlt_coefs[MAX_SAMPLES_PER_FRAME]; |
| 805 | Word16 mag_shift; |
| 806 | const Word16 *pcm_input; |
| 807 | pj_int8_t *out_bits; |
| 808 | |
| 809 | pcm_input = (const Word16*)input->buf + processed; |
| 810 | out_bits = (pj_int8_t*)output->buf + output->size; |
| 811 | |
| 812 | /* Encoder adjust the input signal level */ |
| 813 | if (codec_data->pcm_shift) { |
| 814 | unsigned i; |
| 815 | for (i=0; i<codec_data->samples_per_frame; ++i) { |
| 816 | codec_data->enc_frame[i] = |
| 817 | (Word16)(pcm_input[i] >> codec_data->pcm_shift); |
| 818 | } |
| 819 | pcm_input = codec_data->enc_frame; |
| 820 | } |
| 821 | |
| 822 | /* Convert input samples to rmlt coefs */ |
| 823 | mag_shift = samples_to_rmlt_coefs(pcm_input, |
| 824 | codec_data->enc_old_frame, |
| 825 | mlt_coefs, |
| 826 | codec_data->samples_per_frame); |
| 827 | |
| 828 | /* Encode the mlt coefs. Note that encoder output stream is |
| 829 | * 16 bit array, so we need to take care about endianness. |
| 830 | */ |
| 831 | encoder(codec_data->frame_size_bits, |
| 832 | codec_data->number_of_regions, |
| 833 | mlt_coefs, |
| 834 | mag_shift, |
| 835 | (Word16*)out_bits); |
| 836 | |
| 837 | /* Encoder output are in native host byte order, while ITU says |
| 838 | * it must be in network byte order (MSB first). |
| 839 | */ |
| 840 | swap_bytes((pj_uint16_t*)out_bits, codec_data->frame_size/2); |
| 841 | |
| 842 | processed += codec_data->samples_per_frame; |
| 843 | output->size += codec_data->frame_size; |
| 844 | } |
| 845 | |
| 846 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 847 | output->timestamp = input->timestamp; |
| 848 | |
| 849 | return PJ_SUCCESS; |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * Decode frame. |
| 854 | */ |
| 855 | static pj_status_t codec_decode( pjmedia_codec *codec, |
| 856 | const struct pjmedia_frame *input, |
| 857 | unsigned output_buf_len, |
| 858 | struct pjmedia_frame *output) |
| 859 | { |
| 860 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 861 | Word16 mlt_coefs[MAX_SAMPLES_PER_FRAME]; |
| 862 | Word16 mag_shift; |
| 863 | Bit_Obj bitobj; |
| 864 | Word16 frame_error_flag = 0; |
| 865 | |
| 866 | /* Check frame out length size */ |
| 867 | PJ_ASSERT_RETURN(output_buf_len >= |
| 868 | (unsigned)(codec_data->samples_per_frame<<1), |
| 869 | PJMEDIA_CODEC_EPCMTOOSHORT); |
| 870 | |
| 871 | /* If input is NULL, perform PLC by settting frame_error_flag to 1 */ |
| 872 | if (input) { |
| 873 | /* Check frame in length size */ |
| 874 | PJ_ASSERT_RETURN((pj_uint16_t)input->size == codec_data->frame_size, |
| 875 | PJMEDIA_CODEC_EFRMINLEN); |
| 876 | |
| 877 | /* Decoder requires input of 16-bits array in native host byte |
| 878 | * order, while the frame received from the network are in |
| 879 | * network byte order (MSB first). |
| 880 | */ |
| 881 | swap_bytes((pj_uint16_t*)input->buf, codec_data->frame_size/2); |
| 882 | |
| 883 | bitobj.code_word_ptr = (Word16*)input->buf; |
| 884 | bitobj.current_word = *bitobj.code_word_ptr; |
| 885 | bitobj.code_bit_count = 0; |
| 886 | bitobj.number_of_bits_left = codec_data->frame_size_bits; |
| 887 | |
| 888 | output->timestamp = input->timestamp; |
| 889 | } else { |
| 890 | pj_bzero(&bitobj, sizeof(bitobj)); |
| 891 | frame_error_flag = 1; |
| 892 | } |
| 893 | |
| 894 | /* Process the input frame to get mlt coefs */ |
| 895 | decoder(&bitobj, |
| 896 | &codec_data->dec_randobj, |
| 897 | codec_data->number_of_regions, |
| 898 | mlt_coefs, |
| 899 | &mag_shift, |
| 900 | &codec_data->dec_old_mag_shift, |
| 901 | codec_data->dec_old_mlt_coefs, |
| 902 | frame_error_flag); |
| 903 | |
| 904 | /* Convert the mlt_coefs to PCM samples */ |
| 905 | rmlt_coefs_to_samples(mlt_coefs, |
| 906 | codec_data->dec_old_frame, |
| 907 | (Word16*)output->buf, |
| 908 | codec_data->samples_per_frame, |
| 909 | mag_shift); |
| 910 | |
| 911 | /* Decoder adjust PCM signal */ |
| 912 | if (codec_data->pcm_shift) { |
| 913 | unsigned i; |
| 914 | pj_int16_t *buf = (Word16*)output->buf; |
| 915 | |
| 916 | for (i=0; i<codec_data->samples_per_frame; ++i) { |
| 917 | buf[i] <<= codec_data->pcm_shift; |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 922 | output->size = codec_data->samples_per_frame << 1; |
| 923 | |
| 924 | return PJ_SUCCESS; |
| 925 | } |
| 926 | |
| 927 | /* |
| 928 | * Recover lost frame. |
| 929 | */ |
| 930 | static pj_status_t codec_recover( pjmedia_codec *codec, |
| 931 | unsigned output_buf_len, |
| 932 | struct pjmedia_frame *output) |
| 933 | { |
| 934 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 935 | |
| 936 | /* Use native PLC when PLC is enabled. */ |
| 937 | if (codec_data->plc_enabled) |
| 938 | return codec_decode(codec, NULL, output_buf_len, output); |
| 939 | |
| 940 | /* Otherwise just return zero-fill frame. */ |
| 941 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 942 | output->size = codec_data->samples_per_frame << 1; |
| 943 | |
| 944 | pjmedia_zero_samples((pj_int16_t*)output->buf, |
| 945 | codec_data->samples_per_frame); |
| 946 | |
| 947 | return PJ_SUCCESS; |
| 948 | } |
| 949 | |
| 950 | #endif /* PJMEDIA_HAS_G7221_CODEC */ |