Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
Benny Prijono | a771a51 | 2007-02-19 01:13:53 +0000 | [diff] [blame] | 3 | * Copyright (C)2003-2007 Benny Prijono <benny@prijono.org> |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pjmedia-codec/gsm.h> |
| 20 | #include <pjmedia/codec.h> |
| 21 | #include <pjmedia/errno.h> |
| 22 | #include <pjmedia/endpoint.h> |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 23 | #include <pjmedia/plc.h> |
Benny Prijono | f04ffdd | 2006-02-21 00:11:18 +0000 | [diff] [blame] | 24 | #include <pjmedia/port.h> |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 25 | #include <pjmedia/silencedet.h> |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 26 | #include <pj/assert.h> |
| 27 | #include <pj/pool.h> |
| 28 | #include <pj/string.h> |
| 29 | #include <pj/os.h> |
Benny Prijono | 7f1c90f | 2007-04-07 12:29:46 +0000 | [diff] [blame^] | 30 | #include "../../third_party/gsm/inc/gsm.h" |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 31 | |
Benny Prijono | 4381efe | 2006-03-16 14:24:26 +0000 | [diff] [blame] | 32 | /* |
| 33 | * Only build this file if PJMEDIA_HAS_GSM_CODEC != 0 |
| 34 | */ |
| 35 | #if defined(PJMEDIA_HAS_GSM_CODEC) && PJMEDIA_HAS_GSM_CODEC != 0 |
| 36 | |
| 37 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 38 | /* Prototypes for GSM factory */ |
| 39 | static pj_status_t gsm_test_alloc( pjmedia_codec_factory *factory, |
| 40 | const pjmedia_codec_info *id ); |
| 41 | static pj_status_t gsm_default_attr( pjmedia_codec_factory *factory, |
| 42 | const pjmedia_codec_info *id, |
| 43 | pjmedia_codec_param *attr ); |
| 44 | static pj_status_t gsm_enum_codecs( pjmedia_codec_factory *factory, |
| 45 | unsigned *count, |
| 46 | pjmedia_codec_info codecs[]); |
| 47 | static pj_status_t gsm_alloc_codec( pjmedia_codec_factory *factory, |
| 48 | const pjmedia_codec_info *id, |
| 49 | pjmedia_codec **p_codec); |
| 50 | static pj_status_t gsm_dealloc_codec( pjmedia_codec_factory *factory, |
| 51 | pjmedia_codec *codec ); |
| 52 | |
| 53 | /* Prototypes for GSM implementation. */ |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 54 | static pj_status_t gsm_codec_init( pjmedia_codec *codec, |
| 55 | pj_pool_t *pool ); |
| 56 | static pj_status_t gsm_codec_open( pjmedia_codec *codec, |
Benny Prijono | 6865a3f | 2006-12-30 02:46:57 +0000 | [diff] [blame] | 57 | pjmedia_codec_param *attr ); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 58 | static pj_status_t gsm_codec_close( pjmedia_codec *codec ); |
Benny Prijono | b94a6ab | 2006-12-26 21:18:11 +0000 | [diff] [blame] | 59 | static pj_status_t gsm_codec_modify(pjmedia_codec *codec, |
| 60 | const pjmedia_codec_param *attr ); |
Benny Prijono | 8befd9f | 2006-05-13 22:46:23 +0000 | [diff] [blame] | 61 | static pj_status_t gsm_codec_parse( pjmedia_codec *codec, |
| 62 | void *pkt, |
| 63 | pj_size_t pkt_size, |
| 64 | const pj_timestamp *ts, |
| 65 | unsigned *frame_cnt, |
| 66 | pjmedia_frame frames[]); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 67 | static pj_status_t gsm_codec_encode( pjmedia_codec *codec, |
| 68 | const struct pjmedia_frame *input, |
| 69 | unsigned output_buf_len, |
| 70 | struct pjmedia_frame *output); |
| 71 | static pj_status_t gsm_codec_decode( pjmedia_codec *codec, |
| 72 | const struct pjmedia_frame *input, |
| 73 | unsigned output_buf_len, |
| 74 | struct pjmedia_frame *output); |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 75 | static pj_status_t gsm_codec_recover(pjmedia_codec *codec, |
| 76 | unsigned output_buf_len, |
| 77 | struct pjmedia_frame *output); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 78 | |
| 79 | /* Definition for GSM codec operations. */ |
| 80 | static pjmedia_codec_op gsm_op = |
| 81 | { |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 82 | &gsm_codec_init, |
| 83 | &gsm_codec_open, |
| 84 | &gsm_codec_close, |
Benny Prijono | b94a6ab | 2006-12-26 21:18:11 +0000 | [diff] [blame] | 85 | &gsm_codec_modify, |
Benny Prijono | 8befd9f | 2006-05-13 22:46:23 +0000 | [diff] [blame] | 86 | &gsm_codec_parse, |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 87 | &gsm_codec_encode, |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 88 | &gsm_codec_decode, |
| 89 | &gsm_codec_recover |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | /* Definition for GSM codec factory operations. */ |
| 93 | static pjmedia_codec_factory_op gsm_factory_op = |
| 94 | { |
| 95 | &gsm_test_alloc, |
| 96 | &gsm_default_attr, |
| 97 | &gsm_enum_codecs, |
| 98 | &gsm_alloc_codec, |
| 99 | &gsm_dealloc_codec |
| 100 | }; |
| 101 | |
| 102 | /* GSM factory */ |
| 103 | static struct gsm_codec_factory |
| 104 | { |
| 105 | pjmedia_codec_factory base; |
| 106 | pjmedia_endpt *endpt; |
| 107 | pj_pool_t *pool; |
| 108 | pj_mutex_t *mutex; |
| 109 | pjmedia_codec codec_list; |
| 110 | } gsm_codec_factory; |
| 111 | |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 112 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 113 | /* GSM codec private data. */ |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 114 | struct gsm_data |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 115 | { |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 116 | void *encoder; |
| 117 | void *decoder; |
| 118 | pj_bool_t plc_enabled; |
| 119 | pjmedia_plc *plc; |
| 120 | pj_bool_t vad_enabled; |
| 121 | pjmedia_silence_det *vad; |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 122 | pj_timestamp last_tx; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 123 | }; |
| 124 | |
| 125 | |
| 126 | |
| 127 | /* |
| 128 | * Initialize and register GSM codec factory to pjmedia endpoint. |
| 129 | */ |
| 130 | PJ_DEF(pj_status_t) pjmedia_codec_gsm_init( pjmedia_endpt *endpt ) |
| 131 | { |
| 132 | pjmedia_codec_mgr *codec_mgr; |
| 133 | pj_status_t status; |
| 134 | |
| 135 | if (gsm_codec_factory.pool != NULL) |
| 136 | return PJ_SUCCESS; |
| 137 | |
| 138 | /* Create GSM codec factory. */ |
| 139 | gsm_codec_factory.base.op = &gsm_factory_op; |
| 140 | gsm_codec_factory.base.factory_data = NULL; |
| 141 | gsm_codec_factory.endpt = endpt; |
| 142 | |
| 143 | gsm_codec_factory.pool = pjmedia_endpt_create_pool(endpt, "gsm", 4000, |
| 144 | 4000); |
| 145 | if (!gsm_codec_factory.pool) |
| 146 | return PJ_ENOMEM; |
| 147 | |
| 148 | pj_list_init(&gsm_codec_factory.codec_list); |
| 149 | |
| 150 | /* Create mutex. */ |
| 151 | status = pj_mutex_create_simple(gsm_codec_factory.pool, "gsm", |
| 152 | &gsm_codec_factory.mutex); |
| 153 | if (status != PJ_SUCCESS) |
| 154 | goto on_error; |
| 155 | |
| 156 | /* Get the codec manager. */ |
| 157 | codec_mgr = pjmedia_endpt_get_codec_mgr(endpt); |
| 158 | if (!codec_mgr) { |
| 159 | status = PJ_EINVALIDOP; |
| 160 | goto on_error; |
| 161 | } |
| 162 | |
| 163 | /* Register codec factory to endpoint. */ |
| 164 | status = pjmedia_codec_mgr_register_factory(codec_mgr, |
| 165 | &gsm_codec_factory.base); |
| 166 | if (status != PJ_SUCCESS) |
| 167 | goto on_error; |
| 168 | |
| 169 | /* Done. */ |
| 170 | return PJ_SUCCESS; |
| 171 | |
| 172 | on_error: |
| 173 | pj_pool_release(gsm_codec_factory.pool); |
| 174 | gsm_codec_factory.pool = NULL; |
| 175 | return status; |
| 176 | } |
| 177 | |
| 178 | |
| 179 | |
| 180 | /* |
| 181 | * Unregister GSM codec factory from pjmedia endpoint and deinitialize |
| 182 | * the GSM codec library. |
| 183 | */ |
| 184 | PJ_DEF(pj_status_t) pjmedia_codec_gsm_deinit(void) |
| 185 | { |
| 186 | pjmedia_codec_mgr *codec_mgr; |
| 187 | pj_status_t status; |
| 188 | |
| 189 | if (gsm_codec_factory.pool == NULL) |
| 190 | return PJ_SUCCESS; |
| 191 | |
| 192 | /* We don't want to deinit if there's outstanding codec. */ |
Benny Prijono | d7036a1 | 2007-03-15 10:12:57 +0000 | [diff] [blame] | 193 | /* This is silly, as we'll always have codec in the list if |
| 194 | we ever allocate a codec! A better behavior maybe is to |
| 195 | deallocate all codecs in the list. |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 196 | pj_mutex_lock(gsm_codec_factory.mutex); |
| 197 | if (!pj_list_empty(&gsm_codec_factory.codec_list)) { |
| 198 | pj_mutex_unlock(gsm_codec_factory.mutex); |
| 199 | return PJ_EBUSY; |
| 200 | } |
Benny Prijono | d7036a1 | 2007-03-15 10:12:57 +0000 | [diff] [blame] | 201 | */ |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 202 | |
| 203 | /* Get the codec manager. */ |
| 204 | codec_mgr = pjmedia_endpt_get_codec_mgr(gsm_codec_factory.endpt); |
| 205 | if (!codec_mgr) { |
| 206 | pj_pool_release(gsm_codec_factory.pool); |
| 207 | gsm_codec_factory.pool = NULL; |
| 208 | return PJ_EINVALIDOP; |
| 209 | } |
| 210 | |
| 211 | /* Unregister GSM codec factory. */ |
| 212 | status = pjmedia_codec_mgr_unregister_factory(codec_mgr, |
| 213 | &gsm_codec_factory.base); |
| 214 | |
| 215 | /* Destroy mutex. */ |
| 216 | pj_mutex_destroy(gsm_codec_factory.mutex); |
| 217 | |
| 218 | /* Destroy pool. */ |
| 219 | pj_pool_release(gsm_codec_factory.pool); |
| 220 | gsm_codec_factory.pool = NULL; |
| 221 | |
| 222 | return status; |
| 223 | } |
| 224 | |
| 225 | /* |
| 226 | * Check if factory can allocate the specified codec. |
| 227 | */ |
| 228 | static pj_status_t gsm_test_alloc( pjmedia_codec_factory *factory, |
| 229 | const pjmedia_codec_info *info ) |
| 230 | { |
| 231 | PJ_UNUSED_ARG(factory); |
| 232 | |
| 233 | /* Check payload type. */ |
| 234 | if (info->pt != PJMEDIA_RTP_PT_GSM) |
| 235 | return PJMEDIA_CODEC_EUNSUP; |
| 236 | |
| 237 | /* Ignore the rest, since it's static payload type. */ |
| 238 | |
| 239 | return PJ_SUCCESS; |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * Generate default attribute. |
| 244 | */ |
| 245 | static pj_status_t gsm_default_attr (pjmedia_codec_factory *factory, |
| 246 | const pjmedia_codec_info *id, |
| 247 | pjmedia_codec_param *attr ) |
| 248 | { |
| 249 | PJ_UNUSED_ARG(factory); |
| 250 | PJ_UNUSED_ARG(id); |
| 251 | |
Benny Prijono | ac623b3 | 2006-07-03 15:19:31 +0000 | [diff] [blame] | 252 | pj_bzero(attr, sizeof(pjmedia_codec_param)); |
Benny Prijono | 8befd9f | 2006-05-13 22:46:23 +0000 | [diff] [blame] | 253 | attr->info.clock_rate = 8000; |
| 254 | attr->info.channel_cnt = 1; |
| 255 | attr->info.avg_bps = 13200; |
| 256 | attr->info.pcm_bits_per_sample = 16; |
| 257 | attr->info.frm_ptime = 20; |
| 258 | attr->info.pt = PJMEDIA_RTP_PT_GSM; |
| 259 | |
| 260 | attr->setting.frm_per_pkt = 1; |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 261 | attr->setting.vad = 1; |
| 262 | attr->setting.plc = 1; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 263 | |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 264 | /* Default all other flag bits disabled. */ |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 265 | |
| 266 | return PJ_SUCCESS; |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Enum codecs supported by this factory (i.e. only GSM!). |
| 271 | */ |
| 272 | static pj_status_t gsm_enum_codecs(pjmedia_codec_factory *factory, |
| 273 | unsigned *count, |
| 274 | pjmedia_codec_info codecs[]) |
| 275 | { |
| 276 | PJ_UNUSED_ARG(factory); |
| 277 | PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL); |
| 278 | |
Benny Prijono | ac623b3 | 2006-07-03 15:19:31 +0000 | [diff] [blame] | 279 | pj_bzero(&codecs[0], sizeof(pjmedia_codec_info)); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 280 | codecs[0].encoding_name = pj_str("GSM"); |
| 281 | codecs[0].pt = PJMEDIA_RTP_PT_GSM; |
| 282 | codecs[0].type = PJMEDIA_TYPE_AUDIO; |
Benny Prijono | a837c30 | 2006-04-27 22:36:40 +0000 | [diff] [blame] | 283 | codecs[0].clock_rate = 8000; |
| 284 | codecs[0].channel_cnt = 1; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 285 | |
| 286 | *count = 1; |
| 287 | |
| 288 | return PJ_SUCCESS; |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * Allocate a new GSM codec instance. |
| 293 | */ |
| 294 | static pj_status_t gsm_alloc_codec( pjmedia_codec_factory *factory, |
| 295 | const pjmedia_codec_info *id, |
| 296 | pjmedia_codec **p_codec) |
| 297 | { |
| 298 | pjmedia_codec *codec; |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 299 | struct gsm_data *gsm_data; |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 300 | pj_status_t status; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 301 | |
| 302 | PJ_ASSERT_RETURN(factory && id && p_codec, PJ_EINVAL); |
| 303 | PJ_ASSERT_RETURN(factory == &gsm_codec_factory.base, PJ_EINVAL); |
| 304 | |
| 305 | |
| 306 | pj_mutex_lock(gsm_codec_factory.mutex); |
| 307 | |
| 308 | /* Get free nodes, if any. */ |
| 309 | if (!pj_list_empty(&gsm_codec_factory.codec_list)) { |
| 310 | codec = gsm_codec_factory.codec_list.next; |
| 311 | pj_list_erase(codec); |
| 312 | } else { |
| 313 | codec = pj_pool_zalloc(gsm_codec_factory.pool, |
| 314 | sizeof(pjmedia_codec)); |
| 315 | PJ_ASSERT_RETURN(codec != NULL, PJ_ENOMEM); |
Benny Prijono | f80b1bf | 2006-02-19 02:24:27 +0000 | [diff] [blame] | 316 | codec->op = &gsm_op; |
| 317 | codec->factory = factory; |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 318 | |
| 319 | gsm_data = pj_pool_zalloc(gsm_codec_factory.pool, |
| 320 | sizeof(struct gsm_data)); |
| 321 | codec->codec_data = gsm_data; |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 322 | |
| 323 | /* Create PLC */ |
| 324 | status = pjmedia_plc_create(gsm_codec_factory.pool, 8000, |
| 325 | 160, 0, &gsm_data->plc); |
| 326 | if (status != PJ_SUCCESS) { |
| 327 | pj_mutex_unlock(gsm_codec_factory.mutex); |
| 328 | return status; |
| 329 | } |
| 330 | |
| 331 | /* Create silence detector */ |
| 332 | status = pjmedia_silence_det_create(gsm_codec_factory.pool, |
| 333 | 8000, 160, |
| 334 | &gsm_data->vad); |
| 335 | if (status != PJ_SUCCESS) { |
| 336 | pj_mutex_unlock(gsm_codec_factory.mutex); |
| 337 | return status; |
| 338 | } |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | pj_mutex_unlock(gsm_codec_factory.mutex); |
| 342 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 343 | *p_codec = codec; |
| 344 | return PJ_SUCCESS; |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Free codec. |
| 349 | */ |
| 350 | static pj_status_t gsm_dealloc_codec( pjmedia_codec_factory *factory, |
| 351 | pjmedia_codec *codec ) |
| 352 | { |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 353 | struct gsm_data *gsm_data; |
Benny Prijono | 87445bc | 2006-07-26 11:23:07 +0000 | [diff] [blame] | 354 | pj_int16_t frame[160]; |
| 355 | int i; |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 356 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 357 | PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); |
| 358 | PJ_ASSERT_RETURN(factory == &gsm_codec_factory.base, PJ_EINVAL); |
| 359 | |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 360 | gsm_data = codec->codec_data; |
| 361 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 362 | /* Close codec, if it's not closed. */ |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 363 | gsm_codec_close(codec); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 364 | |
Benny Prijono | 87445bc | 2006-07-26 11:23:07 +0000 | [diff] [blame] | 365 | /* Clear left samples in the PLC, since codec+plc will be reused |
| 366 | * next time. |
| 367 | */ |
| 368 | for (i=0; i<2; ++i) { |
| 369 | pjmedia_zero_samples(frame, PJ_ARRAY_SIZE(frame)); |
| 370 | pjmedia_plc_save(gsm_data->plc, frame); |
| 371 | } |
| 372 | |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 373 | /* Re-init silence_period */ |
| 374 | pj_set_timestamp32(&gsm_data->last_tx, 0, 0); |
| 375 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 376 | /* Put in the free list. */ |
| 377 | pj_mutex_lock(gsm_codec_factory.mutex); |
| 378 | pj_list_push_front(&gsm_codec_factory.codec_list, codec); |
| 379 | pj_mutex_unlock(gsm_codec_factory.mutex); |
| 380 | |
| 381 | return PJ_SUCCESS; |
| 382 | } |
| 383 | |
| 384 | /* |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 385 | * Init codec. |
| 386 | */ |
| 387 | static pj_status_t gsm_codec_init( pjmedia_codec *codec, |
| 388 | pj_pool_t *pool ) |
| 389 | { |
| 390 | PJ_UNUSED_ARG(codec); |
| 391 | PJ_UNUSED_ARG(pool); |
| 392 | return PJ_SUCCESS; |
| 393 | } |
| 394 | |
| 395 | /* |
| 396 | * Open codec. |
| 397 | */ |
| 398 | static pj_status_t gsm_codec_open( pjmedia_codec *codec, |
Benny Prijono | 6865a3f | 2006-12-30 02:46:57 +0000 | [diff] [blame] | 399 | pjmedia_codec_param *attr ) |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 400 | { |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 401 | struct gsm_data *gsm_data = codec->codec_data; |
| 402 | |
| 403 | pj_assert(gsm_data != NULL); |
| 404 | pj_assert(gsm_data->encoder == NULL && gsm_data->decoder == NULL); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 405 | |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 406 | gsm_data->encoder = gsm_create(); |
| 407 | if (!gsm_data->encoder) |
| 408 | return PJMEDIA_CODEC_EFAILED; |
| 409 | |
| 410 | gsm_data->decoder = gsm_create(); |
| 411 | if (!gsm_data->decoder) |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 412 | return PJMEDIA_CODEC_EFAILED; |
| 413 | |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 414 | gsm_data->vad_enabled = (attr->setting.vad != 0); |
| 415 | gsm_data->plc_enabled = (attr->setting.plc != 0); |
| 416 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 417 | return PJ_SUCCESS; |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Close codec. |
| 422 | */ |
| 423 | static pj_status_t gsm_codec_close( pjmedia_codec *codec ) |
| 424 | { |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 425 | struct gsm_data *gsm_data = codec->codec_data; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 426 | |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 427 | pj_assert(gsm_data != NULL); |
| 428 | |
| 429 | if (gsm_data->encoder) { |
| 430 | gsm_destroy(gsm_data->encoder); |
| 431 | gsm_data->encoder = NULL; |
| 432 | } |
| 433 | if (gsm_data->decoder) { |
| 434 | gsm_destroy(gsm_data->decoder); |
| 435 | gsm_data->decoder = NULL; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | return PJ_SUCCESS; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /* |
Benny Prijono | b94a6ab | 2006-12-26 21:18:11 +0000 | [diff] [blame] | 443 | * Modify codec settings. |
| 444 | */ |
| 445 | static pj_status_t gsm_codec_modify(pjmedia_codec *codec, |
| 446 | const pjmedia_codec_param *attr ) |
| 447 | { |
| 448 | struct gsm_data *gsm_data = codec->codec_data; |
| 449 | |
| 450 | pj_assert(gsm_data != NULL); |
Benny Prijono | 6865a3f | 2006-12-30 02:46:57 +0000 | [diff] [blame] | 451 | pj_assert(gsm_data->encoder != NULL && gsm_data->decoder != NULL); |
Benny Prijono | b94a6ab | 2006-12-26 21:18:11 +0000 | [diff] [blame] | 452 | |
| 453 | gsm_data->vad_enabled = (attr->setting.vad != 0); |
| 454 | gsm_data->plc_enabled = (attr->setting.plc != 0); |
| 455 | |
| 456 | return PJ_SUCCESS; |
| 457 | } |
| 458 | |
| 459 | |
| 460 | /* |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 461 | * Get frames in the packet. |
| 462 | */ |
Benny Prijono | 8befd9f | 2006-05-13 22:46:23 +0000 | [diff] [blame] | 463 | static pj_status_t gsm_codec_parse( pjmedia_codec *codec, |
| 464 | void *pkt, |
| 465 | pj_size_t pkt_size, |
| 466 | const pj_timestamp *ts, |
| 467 | unsigned *frame_cnt, |
| 468 | pjmedia_frame frames[]) |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 469 | { |
| 470 | unsigned count = 0; |
| 471 | |
| 472 | PJ_UNUSED_ARG(codec); |
| 473 | |
| 474 | PJ_ASSERT_RETURN(frame_cnt, PJ_EINVAL); |
| 475 | |
| 476 | while (pkt_size >= 33 && count < *frame_cnt) { |
Benny Prijono | 8befd9f | 2006-05-13 22:46:23 +0000 | [diff] [blame] | 477 | frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 478 | frames[count].buf = pkt; |
| 479 | frames[count].size = 33; |
| 480 | frames[count].timestamp.u64 = ts->u64 + count * 160; |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 481 | |
| 482 | pkt = ((char*)pkt) + 33; |
| 483 | pkt_size -= 33; |
| 484 | |
| 485 | ++count; |
| 486 | } |
| 487 | |
| 488 | *frame_cnt = count; |
| 489 | return PJ_SUCCESS; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * Encode frame. |
| 494 | */ |
| 495 | static pj_status_t gsm_codec_encode( pjmedia_codec *codec, |
| 496 | const struct pjmedia_frame *input, |
| 497 | unsigned output_buf_len, |
| 498 | struct pjmedia_frame *output) |
| 499 | { |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 500 | struct gsm_data *gsm_data = codec->codec_data; |
| 501 | |
| 502 | pj_assert(gsm_data != NULL); |
| 503 | PJ_ASSERT_RETURN(input && output, PJ_EINVAL); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 504 | |
| 505 | if (output_buf_len < 33) |
| 506 | return PJMEDIA_CODEC_EFRMTOOSHORT; |
| 507 | |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 508 | PJ_ASSERT_RETURN(input->size==320, PJMEDIA_CODEC_EPCMFRMINLEN); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 509 | |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 510 | /* Detect silence */ |
| 511 | if (gsm_data->vad_enabled) { |
| 512 | pj_bool_t is_silence; |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 513 | pj_int32_t silence_duration; |
| 514 | |
| 515 | silence_duration = pj_timestamp_diff32(&gsm_data->last_tx, |
| 516 | &input->timestamp); |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 517 | |
| 518 | is_silence = pjmedia_silence_det_detect(gsm_data->vad, |
| 519 | input->buf, |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 520 | (input->size >> 1), |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 521 | NULL); |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 522 | if (is_silence && |
| 523 | PJMEDIA_CODEC_MAX_SILENCE_PERIOD != -1 && |
| 524 | silence_duration < PJMEDIA_CODEC_MAX_SILENCE_PERIOD) |
| 525 | { |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 526 | output->type = PJMEDIA_FRAME_TYPE_NONE; |
| 527 | output->buf = NULL; |
| 528 | output->size = 0; |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 529 | output->timestamp = input->timestamp; |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 530 | return PJ_SUCCESS; |
Benny Prijono | c6c0ed0 | 2007-01-20 05:18:14 +0000 | [diff] [blame] | 531 | } else { |
| 532 | gsm_data->last_tx = input->timestamp; |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 533 | } |
| 534 | } |
| 535 | |
| 536 | /* Encode */ |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 537 | gsm_encode(gsm_data->encoder, (short*)input->buf, |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 538 | (unsigned char*)output->buf); |
| 539 | |
| 540 | output->size = 33; |
| 541 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 542 | |
| 543 | return PJ_SUCCESS; |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * Decode frame. |
| 548 | */ |
| 549 | static pj_status_t gsm_codec_decode( pjmedia_codec *codec, |
| 550 | const struct pjmedia_frame *input, |
| 551 | unsigned output_buf_len, |
| 552 | struct pjmedia_frame *output) |
| 553 | { |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 554 | struct gsm_data *gsm_data = codec->codec_data; |
| 555 | |
| 556 | pj_assert(gsm_data != NULL); |
| 557 | PJ_ASSERT_RETURN(input && output, PJ_EINVAL); |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 558 | |
| 559 | if (output_buf_len < 320) |
| 560 | return PJMEDIA_CODEC_EPCMTOOSHORT; |
| 561 | |
| 562 | if (input->size < 33) |
| 563 | return PJMEDIA_CODEC_EFRMTOOSHORT; |
| 564 | |
Benny Prijono | f93895c | 2006-03-05 11:50:53 +0000 | [diff] [blame] | 565 | gsm_decode(gsm_data->decoder, |
Benny Prijono | f80b1bf | 2006-02-19 02:24:27 +0000 | [diff] [blame] | 566 | (unsigned char*)input->buf, |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 567 | (short*)output->buf); |
| 568 | |
| 569 | output->size = 320; |
| 570 | output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 571 | |
Benny Prijono | 70c6891 | 2006-05-19 15:58:13 +0000 | [diff] [blame] | 572 | if (gsm_data->plc_enabled) |
| 573 | pjmedia_plc_save( gsm_data->plc, output->buf); |
| 574 | |
| 575 | return PJ_SUCCESS; |
| 576 | } |
| 577 | |
| 578 | |
| 579 | /* |
| 580 | * Recover lost frame. |
| 581 | */ |
| 582 | static pj_status_t gsm_codec_recover(pjmedia_codec *codec, |
| 583 | unsigned output_buf_len, |
| 584 | struct pjmedia_frame *output) |
| 585 | { |
| 586 | struct gsm_data *gsm_data = codec->codec_data; |
| 587 | |
| 588 | PJ_ASSERT_RETURN(gsm_data->plc_enabled, PJ_EINVALIDOP); |
| 589 | |
| 590 | PJ_ASSERT_RETURN(output_buf_len >= 320, PJMEDIA_CODEC_EPCMTOOSHORT); |
| 591 | |
| 592 | pjmedia_plc_generate(gsm_data->plc, output->buf); |
| 593 | output->size = 320; |
| 594 | |
Benny Prijono | a4bf021 | 2006-02-10 15:57:08 +0000 | [diff] [blame] | 595 | return PJ_SUCCESS; |
| 596 | } |
Benny Prijono | 4381efe | 2006-03-16 14:24:26 +0000 | [diff] [blame] | 597 | |
| 598 | |
| 599 | #endif /* PJMEDIA_HAS_GSM_CODEC */ |
| 600 | |