Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2009 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.h> |
| 22 | #include <pjmedia/errno.h> |
| 23 | #include <pjmedia/endpoint.h> |
| 24 | #include <pjmedia/port.h> |
| 25 | #include <pjmedia/silencedet.h> |
| 26 | #include <pj/assert.h> |
| 27 | #include <pj/log.h> |
| 28 | #include <pj/math.h> |
| 29 | #include <pj/pool.h> |
| 30 | #include <pj/string.h> |
| 31 | #include <pj/os.h> |
| 32 | |
| 33 | /* |
| 34 | * Only build this file if PJMEDIA_HAS_G7221_CODEC != 0 |
| 35 | */ |
| 36 | #if defined(PJMEDIA_HAS_G7221_CODEC) && PJMEDIA_HAS_G7221_CODEC!=0 |
| 37 | |
Nanang Izzuddin | 56e380a | 2009-04-15 14:45:41 +0000 | [diff] [blame] | 38 | #include "../../../third_party/g7221/common/defs.h" |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 39 | |
| 40 | #define THIS_FILE "g7221.c" |
| 41 | |
| 42 | /* Codec tag, it is the SDP encoding name and also MIME subtype name */ |
| 43 | #define CODEC_TAG "G7221" |
| 44 | |
| 45 | /* Sampling rates definition */ |
| 46 | #define WB_SAMPLE_RATE 16000 |
| 47 | #define UWB_SAMPLE_RATE 32000 |
| 48 | |
| 49 | /* Maximum number of samples per frame. */ |
| 50 | #define MAX_SAMPLES_PER_FRAME (UWB_SAMPLE_RATE * 20 / 1000) |
| 51 | |
| 52 | /* Maximum number of codec params. */ |
| 53 | #define MAX_CODEC_MODES 8 |
| 54 | #define START_RSV_MODES_IDX 6 |
| 55 | |
| 56 | |
| 57 | /* Prototypes for G722.1 codec factory */ |
| 58 | static pj_status_t test_alloc( pjmedia_codec_factory *factory, |
| 59 | const pjmedia_codec_info *id ); |
| 60 | static pj_status_t default_attr( pjmedia_codec_factory *factory, |
| 61 | const pjmedia_codec_info *id, |
| 62 | pjmedia_codec_param *attr ); |
| 63 | static pj_status_t enum_codecs( pjmedia_codec_factory *factory, |
| 64 | unsigned *count, |
| 65 | pjmedia_codec_info codecs[]); |
| 66 | static pj_status_t alloc_codec( pjmedia_codec_factory *factory, |
| 67 | const pjmedia_codec_info *id, |
| 68 | pjmedia_codec **p_codec); |
| 69 | static pj_status_t dealloc_codec( pjmedia_codec_factory *factory, |
| 70 | pjmedia_codec *codec ); |
| 71 | |
| 72 | /* Prototypes for G722.1 codec implementation. */ |
| 73 | static pj_status_t codec_init( pjmedia_codec *codec, |
| 74 | pj_pool_t *pool ); |
| 75 | static pj_status_t codec_open( pjmedia_codec *codec, |
| 76 | pjmedia_codec_param *attr ); |
| 77 | static pj_status_t codec_close( pjmedia_codec *codec ); |
| 78 | static pj_status_t codec_modify(pjmedia_codec *codec, |
| 79 | const pjmedia_codec_param *attr ); |
| 80 | static pj_status_t codec_parse( pjmedia_codec *codec, |
| 81 | void *pkt, |
| 82 | pj_size_t pkt_size, |
| 83 | const pj_timestamp *ts, |
| 84 | unsigned *frame_cnt, |
| 85 | pjmedia_frame frames[]); |
| 86 | static pj_status_t codec_encode( pjmedia_codec *codec, |
| 87 | const struct pjmedia_frame *input, |
| 88 | unsigned output_buf_len, |
| 89 | struct pjmedia_frame *output); |
| 90 | static pj_status_t codec_decode( pjmedia_codec *codec, |
| 91 | const struct pjmedia_frame *input, |
| 92 | unsigned output_buf_len, |
| 93 | struct pjmedia_frame *output); |
| 94 | static pj_status_t codec_recover( pjmedia_codec *codec, |
| 95 | unsigned output_buf_len, |
| 96 | struct pjmedia_frame *output); |
| 97 | |
| 98 | /* Definition for G722.1 codec operations. */ |
| 99 | static pjmedia_codec_op codec_op = |
| 100 | { |
| 101 | &codec_init, |
| 102 | &codec_open, |
| 103 | &codec_close, |
| 104 | &codec_modify, |
| 105 | &codec_parse, |
| 106 | &codec_encode, |
| 107 | &codec_decode, |
| 108 | &codec_recover |
| 109 | }; |
| 110 | |
| 111 | /* Definition for G722.1 codec factory operations. */ |
| 112 | static pjmedia_codec_factory_op codec_factory_op = |
| 113 | { |
| 114 | &test_alloc, |
| 115 | &default_attr, |
| 116 | &enum_codecs, |
| 117 | &alloc_codec, |
| 118 | &dealloc_codec |
| 119 | }; |
| 120 | |
| 121 | |
| 122 | /* Structure of G722.1 mode */ |
| 123 | typedef struct codec_mode |
| 124 | { |
| 125 | pj_bool_t enabled; /* Is this mode enabled? */ |
| 126 | pj_uint8_t pt; /* Payload type. */ |
| 127 | unsigned sample_rate; /* Default sampling rate to be used.*/ |
| 128 | unsigned bitrate; /* Bitrate. */ |
| 129 | char bitrate_str[8]; /* Bitrate in string. */ |
| 130 | } codec_mode; |
| 131 | |
| 132 | |
| 133 | /* G722.1 codec factory */ |
| 134 | static struct codec_factory { |
| 135 | pjmedia_codec_factory base; /**< Base class. */ |
| 136 | pjmedia_endpt *endpt; /**< PJMEDIA endpoint instance. */ |
| 137 | pj_pool_t *pool; /**< Codec factory pool. */ |
| 138 | pj_mutex_t *mutex; /**< Codec factory mutex. */ |
| 139 | |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 140 | int pcm_shift; /**< Level adjustment */ |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 141 | unsigned mode_count; /**< Number of G722.1 modes. */ |
| 142 | codec_mode modes[MAX_CODEC_MODES]; /**< The G722.1 modes. */ |
| 143 | unsigned mode_rsv_start;/**< Start index of G722.1 non- |
| 144 | standard modes, currently |
| 145 | there can only be up to two |
| 146 | non-standard modes enabled |
| 147 | at the same time. */ |
| 148 | } codec_factory; |
| 149 | |
| 150 | /* G722.1 codec private data. */ |
| 151 | typedef struct codec_private { |
| 152 | pj_pool_t *pool; /**< Pool for each instance. */ |
| 153 | pj_bool_t plc_enabled; /**< PLC enabled? */ |
| 154 | pj_bool_t vad_enabled; /**< VAD enabled? */ |
| 155 | pjmedia_silence_det *vad; /**< PJMEDIA VAD instance. */ |
| 156 | pj_timestamp last_tx; /**< Timestamp of last transmit.*/ |
| 157 | |
| 158 | /* ITU ref implementation seems to leave the codec engine states to be |
| 159 | * managed by the application, so here we go. |
| 160 | */ |
| 161 | |
| 162 | /* Common engine state */ |
| 163 | pj_uint16_t samples_per_frame; /**< Samples per frame. */ |
| 164 | pj_uint16_t bitrate; /**< Coded stream bitrate. */ |
| 165 | pj_uint16_t frame_size; /**< Coded frame size. */ |
| 166 | pj_uint16_t frame_size_bits; /**< Coded frame size in bits. */ |
| 167 | pj_uint16_t number_of_regions; /**< Number of regions. */ |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 168 | int pcm_shift; /**< Adjustment for PCM in/out */ |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 169 | |
| 170 | /* Encoder specific state */ |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 171 | Word16 *enc_frame; /**< 16bit to 14bit buffer */ |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 172 | Word16 *enc_old_frame; |
| 173 | |
| 174 | /* Decoder specific state */ |
| 175 | Word16 *dec_old_frame; |
| 176 | Rand_Obj dec_randobj; |
| 177 | Word16 dec_old_mag_shift; |
| 178 | Word16 *dec_old_mlt_coefs; |
| 179 | } codec_private_t; |
| 180 | |
| 181 | /* |
| 182 | * Helper function for looking up mode based on payload type. |
| 183 | */ |
| 184 | static codec_mode* lookup_mode(unsigned pt) |
| 185 | { |
| 186 | codec_mode* mode = NULL; |
| 187 | unsigned i; |
| 188 | |
| 189 | for (i = 0; i < codec_factory.mode_count; ++i) { |
| 190 | mode = &codec_factory.modes[i]; |
| 191 | if (mode->pt == pt) |
| 192 | break; |
| 193 | } |
| 194 | |
| 195 | return mode; |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * Helper function to validate G722.1 mode. Valid modes are defined as: |
| 200 | * 1. sample rate must be 16kHz or 32kHz, |
| 201 | * 2. bitrate: |
| 202 | * - for sampling rate 16kHz: 16000 to 32000 bps, it must be a multiple |
| 203 | * of 400 (to keep RTP payload octed-aligned) |
| 204 | * - for sampling rate 32kHz: 24000 to 48000 bps, it must be a multiple |
| 205 | * of 400 (to keep RTP payload octed-aligned) |
| 206 | */ |
| 207 | static pj_bool_t validate_mode(unsigned sample_rate, unsigned bitrate) |
| 208 | { |
| 209 | if (sample_rate == WB_SAMPLE_RATE) { |
| 210 | if (bitrate < 16000 || bitrate > 32000 || |
| 211 | ((bitrate-16000) % 400 != 0)) |
| 212 | { |
| 213 | return PJ_FALSE; |
| 214 | } |
| 215 | } else if (sample_rate == UWB_SAMPLE_RATE) { |
| 216 | if (bitrate < 24000 || bitrate > 48000 || |
| 217 | ((bitrate-24000) % 400 != 0)) |
| 218 | { |
| 219 | return PJ_FALSE; |
| 220 | } |
| 221 | } else { |
| 222 | return PJ_FALSE; |
| 223 | } |
| 224 | |
| 225 | return PJ_TRUE; |
| 226 | } |
| 227 | |
Benny Prijono | 3594ab3 | 2009-04-18 14:29:28 +0000 | [diff] [blame] | 228 | #if defined(PJ_IS_LITTLE_ENDIAN) && PJ_IS_LITTLE_ENDIAN!=0 |
| 229 | PJ_INLINE(void) swap_bytes(pj_uint16_t *buf, unsigned count) |
| 230 | { |
| 231 | pj_uint16_t *end = buf + count; |
| 232 | while (buf != end) { |
| 233 | *buf = (pj_uint16_t)((*buf << 8) | (*buf >> 8)); |
| 234 | ++buf; |
| 235 | } |
| 236 | } |
| 237 | #else |
| 238 | #define swap_bytes(buf, count) |
| 239 | #endif |
| 240 | |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 241 | /* |
| 242 | * Initialize and register G722.1 codec factory to pjmedia endpoint. |
| 243 | */ |
| 244 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_init( pjmedia_endpt *endpt ) |
| 245 | { |
| 246 | pjmedia_codec_mgr *codec_mgr; |
| 247 | codec_mode *mode; |
| 248 | pj_status_t status; |
| 249 | |
| 250 | if (codec_factory.pool != NULL) { |
| 251 | /* Already initialized. */ |
| 252 | return PJ_SUCCESS; |
| 253 | } |
| 254 | |
| 255 | /* Initialize codec modes, by default all standard bitrates are enabled */ |
Nanang Izzuddin | 2765981 | 2009-04-15 17:50:50 +0000 | [diff] [blame] | 256 | codec_factory.mode_count = 0; |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 257 | codec_factory.pcm_shift = PJMEDIA_G7221_DEFAULT_PCM_SHIFT; |
Nanang Izzuddin | 2765981 | 2009-04-15 17:50:50 +0000 | [diff] [blame] | 258 | |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 259 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 260 | mode->enabled = PJ_TRUE; |
| 261 | mode->pt = PJMEDIA_RTP_PT_G722_1_24; |
| 262 | mode->sample_rate = WB_SAMPLE_RATE; |
| 263 | mode->bitrate = 24000; |
| 264 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 265 | |
| 266 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 267 | mode->enabled = PJ_TRUE; |
| 268 | mode->pt = PJMEDIA_RTP_PT_G722_1_32; |
| 269 | mode->sample_rate = WB_SAMPLE_RATE; |
| 270 | mode->bitrate = 32000; |
| 271 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 272 | |
| 273 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 274 | mode->enabled = PJ_TRUE; |
| 275 | mode->pt = PJMEDIA_RTP_PT_G7221C_24; |
| 276 | mode->sample_rate = UWB_SAMPLE_RATE; |
| 277 | mode->bitrate = 24000; |
| 278 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 279 | |
| 280 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 281 | mode->enabled = PJ_TRUE; |
| 282 | mode->pt = PJMEDIA_RTP_PT_G7221C_32; |
| 283 | mode->sample_rate = UWB_SAMPLE_RATE; |
| 284 | mode->bitrate = 32000; |
| 285 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 286 | |
| 287 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 288 | mode->enabled = PJ_TRUE; |
| 289 | mode->pt = PJMEDIA_RTP_PT_G7221C_48; |
| 290 | mode->sample_rate = UWB_SAMPLE_RATE; |
| 291 | mode->bitrate = 48000; |
| 292 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 293 | |
| 294 | /* Non-standard bitrates */ |
| 295 | |
| 296 | /* Bitrate 16kbps is non-standard but rather commonly used. */ |
| 297 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 298 | mode->enabled = PJ_FALSE; |
| 299 | mode->pt = PJMEDIA_RTP_PT_G722_1_16; |
| 300 | mode->sample_rate = WB_SAMPLE_RATE; |
| 301 | mode->bitrate = 16000; |
| 302 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 303 | |
| 304 | /* Reserved two modes for non-standard bitrates */ |
| 305 | codec_factory.mode_rsv_start = codec_factory.mode_count; |
| 306 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 307 | mode->enabled = PJ_FALSE; |
| 308 | mode->pt = PJMEDIA_RTP_PT_G7221_RSV1; |
| 309 | |
| 310 | mode = &codec_factory.modes[codec_factory.mode_count++]; |
| 311 | mode->enabled = PJ_FALSE; |
| 312 | mode->pt = PJMEDIA_RTP_PT_G7221_RSV2; |
| 313 | |
| 314 | pj_assert(codec_factory.mode_count <= MAX_CODEC_MODES); |
| 315 | |
| 316 | /* Create G722.1 codec factory. */ |
| 317 | codec_factory.base.op = &codec_factory_op; |
| 318 | codec_factory.base.factory_data = NULL; |
| 319 | codec_factory.endpt = endpt; |
| 320 | |
| 321 | codec_factory.pool = pjmedia_endpt_create_pool(endpt, "G722.1 codec", |
| 322 | 4000, 4000); |
| 323 | if (!codec_factory.pool) |
| 324 | return PJ_ENOMEM; |
| 325 | |
| 326 | /* Create mutex. */ |
| 327 | status = pj_mutex_create_simple(codec_factory.pool, "G722.1 codec", |
| 328 | &codec_factory.mutex); |
| 329 | if (status != PJ_SUCCESS) |
| 330 | goto on_error; |
| 331 | |
| 332 | /* Get the codec manager. */ |
| 333 | codec_mgr = pjmedia_endpt_get_codec_mgr(endpt); |
| 334 | if (!codec_mgr) { |
| 335 | status = PJ_EINVALIDOP; |
| 336 | goto on_error; |
| 337 | } |
| 338 | |
| 339 | /* Register codec factory to endpoint. */ |
| 340 | status = pjmedia_codec_mgr_register_factory(codec_mgr, |
| 341 | &codec_factory.base); |
| 342 | if (status != PJ_SUCCESS) |
| 343 | goto on_error; |
| 344 | |
| 345 | /* Done. */ |
| 346 | return PJ_SUCCESS; |
| 347 | |
| 348 | on_error: |
| 349 | if (codec_factory.mutex) { |
| 350 | pj_mutex_destroy(codec_factory.mutex); |
| 351 | codec_factory.mutex = NULL; |
| 352 | } |
| 353 | |
| 354 | pj_pool_release(codec_factory.pool); |
| 355 | codec_factory.pool = NULL; |
| 356 | return status; |
| 357 | } |
| 358 | |
| 359 | |
| 360 | /** |
| 361 | * Enable and disable G722.1 modes, including non-standard modes. |
| 362 | */ |
| 363 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_set_mode(unsigned sample_rate, |
| 364 | unsigned bitrate, |
| 365 | pj_bool_t enabled) |
| 366 | { |
| 367 | unsigned i; |
| 368 | |
| 369 | /* Validate mode */ |
| 370 | if (!validate_mode(sample_rate, bitrate)) |
| 371 | return PJMEDIA_CODEC_EINMODE; |
| 372 | |
| 373 | /* Look up in factory modes table */ |
| 374 | for (i = 0; i < codec_factory.mode_count; ++i) { |
| 375 | if (codec_factory.modes[i].sample_rate == sample_rate && |
| 376 | codec_factory.modes[i].bitrate == bitrate) |
| 377 | { |
| 378 | codec_factory.modes[i].enabled = enabled; |
| 379 | return PJ_SUCCESS; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /* Mode not found in modes table, this may be a request to enable |
| 384 | * a non-standard G722.1 mode. |
| 385 | */ |
| 386 | |
| 387 | /* Non-standard mode need to be initialized first before user |
| 388 | * can disable it. |
| 389 | */ |
| 390 | if (!enabled) |
| 391 | return PJ_ENOTFOUND; |
| 392 | |
| 393 | /* Initialize a non-standard mode, look for available space. */ |
| 394 | for (i = codec_factory.mode_rsv_start; |
| 395 | i < codec_factory.mode_count; ++i) |
| 396 | { |
| 397 | if (!codec_factory.modes[i].enabled) |
| 398 | { |
| 399 | codec_mode *mode = &codec_factory.modes[i]; |
| 400 | mode->enabled = PJ_TRUE; |
| 401 | mode->sample_rate = sample_rate; |
| 402 | mode->bitrate = bitrate; |
| 403 | pj_utoa(mode->bitrate, mode->bitrate_str); |
| 404 | |
| 405 | return PJ_SUCCESS; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | /* No space for non-standard mode. */ |
| 410 | return PJ_ETOOMANY; |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 415 | * Set level adjustment. |
| 416 | */ |
| 417 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_set_pcm_shift(int val) |
| 418 | { |
| 419 | codec_factory.pcm_shift = val; |
| 420 | return PJ_SUCCESS; |
| 421 | } |
| 422 | |
| 423 | /* |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 424 | * Unregister G722.1 codec factory from pjmedia endpoint. |
| 425 | */ |
| 426 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_deinit(void) |
| 427 | { |
| 428 | pjmedia_codec_mgr *codec_mgr; |
| 429 | pj_status_t status; |
| 430 | |
| 431 | if (codec_factory.pool == NULL) { |
| 432 | /* Already deinitialized */ |
| 433 | return PJ_SUCCESS; |
| 434 | } |
| 435 | |
| 436 | pj_mutex_lock(codec_factory.mutex); |
| 437 | |
| 438 | /* Get the codec manager. */ |
| 439 | codec_mgr = pjmedia_endpt_get_codec_mgr(codec_factory.endpt); |
| 440 | if (!codec_mgr) { |
| 441 | pj_pool_release(codec_factory.pool); |
| 442 | codec_factory.pool = NULL; |
| 443 | return PJ_EINVALIDOP; |
| 444 | } |
| 445 | |
| 446 | /* Unregister G722.1 codec factory. */ |
| 447 | status = pjmedia_codec_mgr_unregister_factory(codec_mgr, |
| 448 | &codec_factory.base); |
| 449 | |
| 450 | /* Destroy mutex. */ |
| 451 | pj_mutex_destroy(codec_factory.mutex); |
| 452 | |
| 453 | /* Destroy pool. */ |
| 454 | pj_pool_release(codec_factory.pool); |
| 455 | codec_factory.pool = NULL; |
| 456 | |
| 457 | return status; |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Check if factory can allocate the specified codec. |
| 462 | */ |
| 463 | static pj_status_t test_alloc( pjmedia_codec_factory *factory, |
| 464 | const pjmedia_codec_info *info ) |
| 465 | { |
| 466 | PJ_UNUSED_ARG(factory); |
| 467 | |
| 468 | /* Type MUST be audio. */ |
| 469 | if (info->type != PJMEDIA_TYPE_AUDIO) |
| 470 | return PJMEDIA_CODEC_EUNSUP; |
| 471 | |
| 472 | /* Check encoding name. */ |
| 473 | if (pj_stricmp2(&info->encoding_name, CODEC_TAG) != 0) |
| 474 | return PJMEDIA_CODEC_EUNSUP; |
| 475 | |
| 476 | /* Check clock-rate */ |
| 477 | if (info->clock_rate != WB_SAMPLE_RATE && |
| 478 | info->clock_rate != UWB_SAMPLE_RATE) |
| 479 | { |
| 480 | return PJMEDIA_CODEC_EUNSUP; |
| 481 | } |
| 482 | |
| 483 | return PJ_SUCCESS; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * Generate default attribute. |
| 488 | */ |
| 489 | static pj_status_t default_attr ( pjmedia_codec_factory *factory, |
| 490 | const pjmedia_codec_info *id, |
| 491 | pjmedia_codec_param *attr ) |
| 492 | { |
| 493 | codec_mode *mode; |
| 494 | |
| 495 | PJ_ASSERT_RETURN(factory==&codec_factory.base, PJ_EINVAL); |
| 496 | |
| 497 | pj_bzero(attr, sizeof(pjmedia_codec_param)); |
| 498 | |
| 499 | mode = lookup_mode(id->pt); |
| 500 | if (mode == NULL || !mode->enabled) |
| 501 | return PJMEDIA_CODEC_EUNSUP; |
| 502 | |
| 503 | attr->info.pt = (pj_uint8_t)id->pt; |
| 504 | attr->info.channel_cnt = 1; |
| 505 | attr->info.clock_rate = mode->sample_rate; |
| 506 | attr->info.max_bps = mode->bitrate; |
| 507 | attr->info.avg_bps = mode->bitrate; |
| 508 | attr->info.pcm_bits_per_sample = 16; |
| 509 | attr->info.frm_ptime = 20; |
| 510 | |
| 511 | /* Default flags. */ |
| 512 | attr->setting.plc = 1; |
| 513 | attr->setting.vad = 0; |
| 514 | attr->setting.frm_per_pkt = 1; |
| 515 | |
| 516 | /* Default FMTP setting */ |
| 517 | attr->setting.dec_fmtp.cnt = 1; |
| 518 | attr->setting.dec_fmtp.param[0].name = pj_str("bitrate"); |
| 519 | attr->setting.dec_fmtp.param[0].val = pj_str(mode->bitrate_str); |
| 520 | |
| 521 | return PJ_SUCCESS; |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Enum codecs supported by this factory. |
| 526 | */ |
| 527 | static pj_status_t enum_codecs( pjmedia_codec_factory *factory, |
| 528 | unsigned *count, |
| 529 | pjmedia_codec_info codecs[]) |
| 530 | { |
Nanang Izzuddin | f484a1d | 2009-04-02 10:41:22 +0000 | [diff] [blame] | 531 | unsigned i, max_cnt; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 532 | |
| 533 | PJ_ASSERT_RETURN(factory==&codec_factory.base, PJ_EINVAL); |
| 534 | PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL); |
| 535 | |
Nanang Izzuddin | f484a1d | 2009-04-02 10:41:22 +0000 | [diff] [blame] | 536 | max_cnt = *count; |
| 537 | *count = 0; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 538 | |
Nanang Izzuddin | f484a1d | 2009-04-02 10:41:22 +0000 | [diff] [blame] | 539 | for (i=0; (i < codec_factory.mode_count) && (*count < max_cnt); ++i) |
| 540 | { |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 541 | if (!codec_factory.modes[i].enabled) |
| 542 | continue; |
| 543 | |
Nanang Izzuddin | f484a1d | 2009-04-02 10:41:22 +0000 | [diff] [blame] | 544 | pj_bzero(&codecs[*count], sizeof(pjmedia_codec_info)); |
| 545 | codecs[*count].encoding_name = pj_str((char*)CODEC_TAG); |
| 546 | codecs[*count].pt = codec_factory.modes[i].pt; |
| 547 | codecs[*count].type = PJMEDIA_TYPE_AUDIO; |
| 548 | codecs[*count].clock_rate = codec_factory.modes[i].sample_rate; |
| 549 | codecs[*count].channel_cnt = 1; |
| 550 | |
| 551 | ++ *count; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | return PJ_SUCCESS; |
| 555 | } |
| 556 | |
| 557 | /* |
| 558 | * Allocate a new codec instance. |
| 559 | */ |
| 560 | static pj_status_t alloc_codec( pjmedia_codec_factory *factory, |
| 561 | const pjmedia_codec_info *id, |
| 562 | pjmedia_codec **p_codec) |
| 563 | { |
| 564 | codec_private_t *codec_data; |
| 565 | pjmedia_codec *codec; |
| 566 | pj_pool_t *pool; |
| 567 | pj_status_t status; |
| 568 | |
| 569 | PJ_ASSERT_RETURN(factory && id && p_codec, PJ_EINVAL); |
| 570 | PJ_ASSERT_RETURN(factory == &codec_factory.base, PJ_EINVAL); |
| 571 | |
| 572 | pj_mutex_lock(codec_factory.mutex); |
| 573 | |
| 574 | /* Create pool for codec instance */ |
| 575 | pool = pjmedia_endpt_create_pool(codec_factory.endpt, "G7221", 512, 512); |
| 576 | codec = PJ_POOL_ZALLOC_T(pool, pjmedia_codec); |
| 577 | codec->op = &codec_op; |
| 578 | codec->factory = factory; |
| 579 | codec->codec_data = PJ_POOL_ZALLOC_T(pool, codec_private_t); |
| 580 | codec_data = (codec_private_t*) codec->codec_data; |
| 581 | codec_data->pool = pool; |
| 582 | |
| 583 | /* Create silence detector */ |
| 584 | status = pjmedia_silence_det_create(pool, id->clock_rate, |
| 585 | id->clock_rate * 20 / 1000, |
| 586 | &codec_data->vad); |
| 587 | if (status != PJ_SUCCESS) { |
| 588 | pj_mutex_unlock(codec_factory.mutex); |
| 589 | return status; |
| 590 | } |
| 591 | |
| 592 | pj_mutex_unlock(codec_factory.mutex); |
| 593 | |
| 594 | *p_codec = codec; |
| 595 | return PJ_SUCCESS; |
| 596 | } |
| 597 | |
| 598 | /* |
| 599 | * Free codec. |
| 600 | */ |
| 601 | static pj_status_t dealloc_codec( pjmedia_codec_factory *factory, |
| 602 | pjmedia_codec *codec ) |
| 603 | { |
| 604 | codec_private_t *codec_data; |
| 605 | pj_pool_t *pool; |
| 606 | |
| 607 | PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); |
| 608 | PJ_ASSERT_RETURN(factory == &codec_factory.base, PJ_EINVAL); |
| 609 | |
| 610 | /* Close codec, if it's not closed. */ |
| 611 | codec_data = (codec_private_t*) codec->codec_data; |
| 612 | pool = codec_data->pool; |
| 613 | codec_close(codec); |
| 614 | |
| 615 | /* Release codec pool */ |
| 616 | pj_pool_release(pool); |
| 617 | |
| 618 | return PJ_SUCCESS; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * Init codec. |
| 623 | */ |
| 624 | static pj_status_t codec_init( pjmedia_codec *codec, |
| 625 | pj_pool_t *pool ) |
| 626 | { |
| 627 | PJ_UNUSED_ARG(codec); |
| 628 | PJ_UNUSED_ARG(pool); |
| 629 | return PJ_SUCCESS; |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * Open codec. |
| 634 | */ |
| 635 | static pj_status_t codec_open( pjmedia_codec *codec, |
| 636 | pjmedia_codec_param *attr ) |
| 637 | { |
| 638 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 639 | pj_pool_t *pool; |
| 640 | unsigned tmp; |
| 641 | |
| 642 | /* Validation mode first! */ |
| 643 | if (!validate_mode(attr->info.clock_rate, attr->info.avg_bps)) |
| 644 | return PJMEDIA_CODEC_EINMODE; |
| 645 | |
| 646 | pool = codec_data->pool; |
| 647 | |
| 648 | /* Initialize common state */ |
| 649 | codec_data->vad_enabled = (attr->setting.vad != 0); |
| 650 | codec_data->plc_enabled = (attr->setting.plc != 0); |
| 651 | |
| 652 | codec_data->bitrate = (pj_uint16_t)attr->info.avg_bps; |
| 653 | codec_data->frame_size_bits = (pj_uint16_t)(attr->info.avg_bps*20/1000); |
| 654 | codec_data->frame_size = (pj_uint16_t)(codec_data->frame_size_bits>>3); |
| 655 | codec_data->samples_per_frame = (pj_uint16_t) |
| 656 | (attr->info.clock_rate*20/1000); |
| 657 | codec_data->number_of_regions = (pj_uint16_t) |
| 658 | (attr->info.clock_rate <= WB_SAMPLE_RATE? |
| 659 | NUMBER_OF_REGIONS:MAX_NUMBER_OF_REGIONS); |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 660 | codec_data->pcm_shift = codec_factory.pcm_shift; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 661 | |
| 662 | /* Initialize encoder state */ |
| 663 | tmp = codec_data->samples_per_frame << 1; |
| 664 | codec_data->enc_old_frame = (Word16*)pj_pool_zalloc(pool, tmp); |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 665 | codec_data->enc_frame = (Word16*)pj_pool_alloc(pool, tmp); |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 666 | |
| 667 | /* Initialize decoder state */ |
| 668 | tmp = codec_data->samples_per_frame; |
| 669 | codec_data->dec_old_frame = (Word16*)pj_pool_zalloc(pool, tmp); |
| 670 | |
| 671 | tmp = codec_data->samples_per_frame << 1; |
| 672 | codec_data->dec_old_mlt_coefs = (Word16*)pj_pool_zalloc(pool, tmp); |
| 673 | |
| 674 | codec_data->dec_randobj.seed0 = 1; |
| 675 | codec_data->dec_randobj.seed1 = 1; |
| 676 | codec_data->dec_randobj.seed2 = 1; |
| 677 | codec_data->dec_randobj.seed3 = 1; |
| 678 | |
| 679 | return PJ_SUCCESS; |
| 680 | } |
| 681 | |
| 682 | /* |
| 683 | * Close codec. |
| 684 | */ |
| 685 | static pj_status_t codec_close( pjmedia_codec *codec ) |
| 686 | { |
| 687 | PJ_UNUSED_ARG(codec); |
| 688 | |
| 689 | return PJ_SUCCESS; |
| 690 | } |
| 691 | |
| 692 | |
| 693 | /* |
| 694 | * Modify codec settings. |
| 695 | */ |
| 696 | static pj_status_t codec_modify( pjmedia_codec *codec, |
| 697 | const pjmedia_codec_param *attr ) |
| 698 | { |
| 699 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 700 | |
| 701 | codec_data->vad_enabled = (attr->setting.vad != 0); |
| 702 | codec_data->plc_enabled = (attr->setting.plc != 0); |
| 703 | |
| 704 | return PJ_SUCCESS; |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * Get frames in the packet. |
| 709 | */ |
| 710 | static pj_status_t codec_parse( pjmedia_codec *codec, |
| 711 | void *pkt, |
| 712 | pj_size_t pkt_size, |
| 713 | const pj_timestamp *ts, |
| 714 | unsigned *frame_cnt, |
| 715 | pjmedia_frame frames[]) |
| 716 | { |
| 717 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 718 | unsigned count = 0; |
| 719 | |
| 720 | PJ_ASSERT_RETURN(frame_cnt, PJ_EINVAL); |
| 721 | |
| 722 | /* Parse based on fixed frame size. */ |
| 723 | while (pkt_size >= codec_data->frame_size && count < *frame_cnt) { |
| 724 | frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 725 | frames[count].buf = pkt; |
| 726 | frames[count].size = codec_data->frame_size; |
| 727 | frames[count].timestamp.u64 = ts->u64 + |
| 728 | count * codec_data->samples_per_frame; |
| 729 | |
| 730 | pkt = (pj_uint8_t*)pkt + codec_data->frame_size; |
| 731 | pkt_size -= codec_data->frame_size; |
| 732 | |
| 733 | ++count; |
| 734 | } |
| 735 | |
| 736 | pj_assert(pkt_size == 0); |
| 737 | *frame_cnt = count; |
| 738 | |
| 739 | return PJ_SUCCESS; |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | * Encode frames. |
| 744 | */ |
| 745 | static pj_status_t codec_encode( pjmedia_codec *codec, |
| 746 | const struct pjmedia_frame *input, |
| 747 | unsigned output_buf_len, |
| 748 | struct pjmedia_frame *output) |
| 749 | { |
| 750 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 751 | const Word16 *pcm_input; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 752 | Word16 mlt_coefs[MAX_SAMPLES_PER_FRAME]; |
| 753 | Word16 mag_shift; |
| 754 | |
| 755 | /* Check frame in & out size */ |
| 756 | PJ_ASSERT_RETURN((pj_uint16_t)input->size == |
| 757 | (codec_data->samples_per_frame<<1), |
| 758 | PJMEDIA_CODEC_EPCMTOOSHORT); |
| 759 | PJ_ASSERT_RETURN(output_buf_len >= codec_data->frame_size, |
| 760 | PJMEDIA_CODEC_EFRMTOOSHORT); |
| 761 | |
| 762 | /* Apply silence detection if VAD is enabled */ |
| 763 | if (codec_data->vad_enabled) { |
| 764 | pj_bool_t is_silence; |
| 765 | pj_int32_t silence_duration; |
| 766 | |
| 767 | pj_assert(codec_data->vad); |
| 768 | |
| 769 | silence_duration = pj_timestamp_diff32(&codec_data->last_tx, |
| 770 | &input->timestamp); |
| 771 | |
| 772 | is_silence = pjmedia_silence_det_detect(codec_data->vad, |
| 773 | (const pj_int16_t*) input->buf, |
| 774 | (input->size >> 1), |
| 775 | NULL); |
| 776 | if (is_silence && |
Nanang Izzuddin | 4ff93f4 | 2009-06-13 15:28:37 +0000 | [diff] [blame] | 777 | (PJMEDIA_CODEC_MAX_SILENCE_PERIOD == -1 || |
| 778 | silence_duration < (PJMEDIA_CODEC_MAX_SILENCE_PERIOD * |
| 779 | (int)codec_data->samples_per_frame / 20))) |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 780 | { |
| 781 | output->type = PJMEDIA_FRAME_TYPE_NONE; |
| 782 | output->buf = NULL; |
| 783 | output->size = 0; |
| 784 | output->timestamp = input->timestamp; |
| 785 | return PJ_SUCCESS; |
| 786 | } else { |
| 787 | codec_data->last_tx = input->timestamp; |
| 788 | } |
| 789 | } |
| 790 | |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 791 | /* Encoder adjust the input signal level */ |
| 792 | if (codec_data->pcm_shift) { |
| 793 | unsigned i; |
| 794 | pcm_input = (const Word16*)input->buf; |
| 795 | for (i=0; i<codec_data->samples_per_frame; ++i) { |
| 796 | codec_data->enc_frame[i] = |
| 797 | (pj_int16_t)(pcm_input[i] >> codec_data->pcm_shift); |
| 798 | } |
| 799 | pcm_input = codec_data->enc_frame; |
| 800 | } else { |
| 801 | pcm_input = (const Word16*)input->buf; |
| 802 | } |
| 803 | |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 804 | /* Convert input samples to rmlt coefs */ |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 805 | mag_shift = samples_to_rmlt_coefs(pcm_input, |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 806 | codec_data->enc_old_frame, |
| 807 | mlt_coefs, |
| 808 | codec_data->samples_per_frame); |
| 809 | |
Nanang Izzuddin | 134989a | 2009-04-06 11:45:25 +0000 | [diff] [blame] | 810 | /* Encode the mlt coefs. Note that encoder output stream is 16 bit array, |
| 811 | * so we need to take care about endianness. |
| 812 | */ |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 813 | encoder(codec_data->frame_size_bits, |
| 814 | codec_data->number_of_regions, |
| 815 | mlt_coefs, |
| 816 | mag_shift, |
| 817 | output->buf); |
| 818 | |
Benny Prijono | 3594ab3 | 2009-04-18 14:29:28 +0000 | [diff] [blame] | 819 | /* Encoder output are in native host byte order, while ITU says |
| 820 | * it must be in network byte order (MSB first). |
| 821 | */ |
| 822 | swap_bytes((pj_uint16_t*)output->buf, codec_data->frame_size/2); |
Nanang Izzuddin | 134989a | 2009-04-06 11:45:25 +0000 | [diff] [blame] | 823 | |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 824 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 825 | output->size = codec_data->frame_size; |
Nanang Izzuddin | 5fe0314 | 2009-06-02 18:01:49 +0000 | [diff] [blame] | 826 | output->timestamp = input->timestamp; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 827 | |
| 828 | return PJ_SUCCESS; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * Decode frame. |
| 833 | */ |
| 834 | static pj_status_t codec_decode( pjmedia_codec *codec, |
| 835 | const struct pjmedia_frame *input, |
| 836 | unsigned output_buf_len, |
| 837 | struct pjmedia_frame *output) |
| 838 | { |
| 839 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 840 | Word16 mlt_coefs[MAX_SAMPLES_PER_FRAME]; |
| 841 | Word16 mag_shift; |
| 842 | Bit_Obj bitobj; |
| 843 | Word16 frame_error_flag = 0; |
| 844 | |
| 845 | /* Check frame out length size */ |
| 846 | PJ_ASSERT_RETURN(output_buf_len >= |
| 847 | (unsigned)(codec_data->samples_per_frame<<1), |
| 848 | PJMEDIA_CODEC_EPCMTOOSHORT); |
| 849 | |
| 850 | /* If input is NULL, perform PLC by settting frame_error_flag to 1 */ |
| 851 | if (input) { |
| 852 | /* Check frame in length size */ |
| 853 | PJ_ASSERT_RETURN((pj_uint16_t)input->size == codec_data->frame_size, |
| 854 | PJMEDIA_CODEC_EFRMINLEN); |
Nanang Izzuddin | 134989a | 2009-04-06 11:45:25 +0000 | [diff] [blame] | 855 | |
Benny Prijono | 3594ab3 | 2009-04-18 14:29:28 +0000 | [diff] [blame] | 856 | /* Decoder requires input of 16-bits array in native host byte |
| 857 | * order, while the frame received from the network are in |
| 858 | * network byte order (MSB first). |
Nanang Izzuddin | 134989a | 2009-04-06 11:45:25 +0000 | [diff] [blame] | 859 | */ |
Benny Prijono | 3594ab3 | 2009-04-18 14:29:28 +0000 | [diff] [blame] | 860 | swap_bytes((pj_uint16_t*)input->buf, codec_data->frame_size/2); |
Nanang Izzuddin | 134989a | 2009-04-06 11:45:25 +0000 | [diff] [blame] | 861 | |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 862 | bitobj.code_word_ptr = (Word16*)input->buf; |
| 863 | bitobj.current_word = *bitobj.code_word_ptr; |
| 864 | bitobj.code_bit_count = 0; |
| 865 | bitobj.number_of_bits_left = codec_data->frame_size_bits; |
Nanang Izzuddin | 5fe0314 | 2009-06-02 18:01:49 +0000 | [diff] [blame] | 866 | |
| 867 | output->timestamp = input->timestamp; |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 868 | } else { |
| 869 | pj_bzero(&bitobj, sizeof(bitobj)); |
| 870 | frame_error_flag = 1; |
| 871 | } |
| 872 | |
| 873 | /* Process the input frame to get mlt coefs */ |
| 874 | decoder(&bitobj, |
| 875 | &codec_data->dec_randobj, |
| 876 | codec_data->number_of_regions, |
| 877 | mlt_coefs, |
| 878 | &mag_shift, |
| 879 | &codec_data->dec_old_mag_shift, |
| 880 | codec_data->dec_old_mlt_coefs, |
| 881 | frame_error_flag); |
| 882 | |
| 883 | /* Convert the mlt_coefs to PCM samples */ |
| 884 | rmlt_coefs_to_samples(mlt_coefs, |
| 885 | codec_data->dec_old_frame, |
| 886 | (Word16*)output->buf, |
| 887 | codec_data->samples_per_frame, |
| 888 | mag_shift); |
| 889 | |
Benny Prijono | 8496b93 | 2009-04-20 14:19:11 +0000 | [diff] [blame] | 890 | /* Decoder adjust PCM signal */ |
| 891 | if (codec_data->pcm_shift) { |
| 892 | unsigned i; |
| 893 | pj_int16_t *buf = (Word16*)output->buf; |
| 894 | |
| 895 | for (i=0; i<codec_data->samples_per_frame; ++i) { |
| 896 | buf[i] <<= codec_data->pcm_shift; |
| 897 | } |
| 898 | } |
| 899 | |
Nanang Izzuddin | 57b8857 | 2009-04-01 12:05:34 +0000 | [diff] [blame] | 900 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 901 | output->size = codec_data->samples_per_frame << 1; |
| 902 | |
| 903 | return PJ_SUCCESS; |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * Recover lost frame. |
| 908 | */ |
| 909 | static pj_status_t codec_recover( pjmedia_codec *codec, |
| 910 | unsigned output_buf_len, |
| 911 | struct pjmedia_frame *output) |
| 912 | { |
| 913 | codec_private_t *codec_data = (codec_private_t*) codec->codec_data; |
| 914 | |
| 915 | /* Use native PLC when PLC is enabled. */ |
| 916 | if (codec_data->plc_enabled) |
| 917 | return codec_decode(codec, NULL, output_buf_len, output); |
| 918 | |
| 919 | /* Otherwise just return zero-fill frame. */ |
| 920 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 921 | output->size = codec_data->samples_per_frame << 1; |
| 922 | |
| 923 | pjmedia_zero_samples((pj_int16_t*)output->buf, |
| 924 | codec_data->samples_per_frame); |
| 925 | |
| 926 | return PJ_SUCCESS; |
| 927 | } |
| 928 | |
| 929 | #endif /* PJMEDIA_HAS_G7221_CODEC */ |