Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [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/conference.h> |
| 21 | #include <pjmedia/alaw_ulaw.h> |
| 22 | #include <pjmedia/delaybuf.h> |
| 23 | #include <pjmedia/errno.h> |
| 24 | #include <pjmedia/port.h> |
| 25 | #include <pjmedia/resample.h> |
| 26 | #include <pjmedia/silencedet.h> |
| 27 | #include <pjmedia/sound_port.h> |
| 28 | #include <pjmedia/stereo.h> |
| 29 | #include <pj/array.h> |
| 30 | #include <pj/assert.h> |
| 31 | #include <pj/log.h> |
| 32 | #include <pj/pool.h> |
| 33 | #include <pj/string.h> |
| 34 | |
| 35 | #if !defined(PJMEDIA_CONF_USE_SWITCH_BOARD) || PJMEDIA_CONF_USE_SWITCH_BOARD==0 |
| 36 | |
| 37 | /* CONF_DEBUG enables detailed operation of the conference bridge. |
| 38 | * Beware that it prints large amounts of logs (several lines per frame). |
| 39 | */ |
| 40 | //#define CONF_DEBUG |
| 41 | #ifdef CONF_DEBUG |
| 42 | # include <stdio.h> |
| 43 | # define TRACE_(x) PJ_LOG(5,x) |
| 44 | #else |
| 45 | # define TRACE_(x) |
| 46 | #endif |
| 47 | |
| 48 | |
| 49 | /* REC_FILE macro enables recording of the samples written to the sound |
| 50 | * device. The file contains RAW PCM data with no header, and has the |
| 51 | * same settings (clock rate etc) as the conference bridge. |
| 52 | * This should only be enabled when debugging audio quality *only*. |
| 53 | */ |
| 54 | //#define REC_FILE "confrec.pcm" |
| 55 | #ifdef REC_FILE |
| 56 | static FILE *fhnd_rec; |
| 57 | #endif |
| 58 | |
| 59 | |
| 60 | #define THIS_FILE "conference.c" |
| 61 | |
| 62 | #define RX_BUF_COUNT PJMEDIA_SOUND_BUFFER_COUNT |
| 63 | |
| 64 | #define BYTES_PER_SAMPLE 2 |
| 65 | |
| 66 | #define SIGNATURE PJMEDIA_CONF_BRIDGE_SIGNATURE |
| 67 | #define SIGNATURE_PORT PJMEDIA_SIG_PORT_CONF_PASV |
| 68 | /* Normal level is hardcodec to 128 in all over places */ |
| 69 | #define NORMAL_LEVEL 128 |
| 70 | #define SLOT_TYPE unsigned |
| 71 | #define INVALID_SLOT ((SLOT_TYPE)-1) |
| 72 | |
| 73 | |
| 74 | /* These are settings to control the adaptivity of changes in the |
| 75 | * signal level of the ports, so that sudden change in signal level |
| 76 | * in the port does not cause misaligned signal (which causes noise). |
| 77 | */ |
| 78 | #define ATTACK_A (conf->clock_rate / conf->samples_per_frame) |
| 79 | #define ATTACK_B 1 |
| 80 | #define DECAY_A 0 |
| 81 | #define DECAY_B 1 |
| 82 | |
| 83 | #define SIMPLE_AGC(last, target) \ |
| 84 | if (target >= last) \ |
| 85 | target = (ATTACK_A*(last+1)+ATTACK_B*target)/(ATTACK_A+ATTACK_B); \ |
| 86 | else \ |
| 87 | target = (DECAY_A*last+DECAY_B*target)/(DECAY_A+DECAY_B) |
| 88 | |
| 89 | #define MAX_LEVEL (32767) |
| 90 | #define MIN_LEVEL (-32768) |
| 91 | |
| 92 | #define IS_OVERFLOW(s) ((s > MAX_LEVEL) || (s < MIN_LEVEL)) |
| 93 | |
| 94 | |
| 95 | /* |
| 96 | * DON'T GET CONFUSED WITH TX/RX!! |
| 97 | * |
| 98 | * TX and RX directions are always viewed from the conference bridge's point |
| 99 | * of view, and NOT from the port's point of view. So TX means the bridge |
| 100 | * is transmitting to the port, RX means the bridge is receiving from the |
| 101 | * port. |
| 102 | */ |
| 103 | |
| 104 | |
| 105 | /** |
| 106 | * This is a port connected to conference bridge. |
| 107 | */ |
| 108 | struct conf_port |
| 109 | { |
| 110 | pj_str_t name; /**< Port name. */ |
| 111 | pjmedia_port *port; /**< get_frame() and put_frame() */ |
| 112 | pjmedia_port_op rx_setting; /**< Can we receive from this port */ |
| 113 | pjmedia_port_op tx_setting; /**< Can we transmit to this port */ |
| 114 | unsigned listener_cnt; /**< Number of listeners. */ |
| 115 | SLOT_TYPE *listener_slots;/**< Array of listeners. */ |
| 116 | unsigned transmitter_cnt;/**<Number of transmitters. */ |
| 117 | |
| 118 | /* Shortcut for port info. */ |
| 119 | unsigned clock_rate; /**< Port's clock rate. */ |
| 120 | unsigned samples_per_frame; /**< Port's samples per frame. */ |
| 121 | unsigned channel_count; /**< Port's channel count. */ |
| 122 | |
| 123 | /* Calculated signal levels: */ |
| 124 | unsigned tx_level; /**< Last tx level to this port. */ |
| 125 | unsigned rx_level; /**< Last rx level from this port. */ |
| 126 | |
| 127 | /* The normalized signal level adjustment. |
| 128 | * A value of 128 (NORMAL_LEVEL) means there's no adjustment. |
| 129 | */ |
| 130 | unsigned tx_adj_level; /**< Adjustment for TX. */ |
| 131 | unsigned rx_adj_level; /**< Adjustment for RX. */ |
| 132 | |
| 133 | /* Resample, for converting clock rate, if they're different. */ |
| 134 | pjmedia_resample *rx_resample; |
| 135 | pjmedia_resample *tx_resample; |
| 136 | |
| 137 | /* RX buffer is temporary buffer to be used when there is mismatch |
| 138 | * between port's sample rate or ptime with conference's sample rate |
| 139 | * or ptime. The buffer is used for sampling rate conversion AND/OR to |
| 140 | * buffer the samples until there are enough samples to fulfill a |
| 141 | * complete frame to be processed by the bridge. |
| 142 | * |
| 143 | * When both sample rate AND ptime of the port match the conference |
| 144 | * settings, this buffer will not be created. |
| 145 | * |
| 146 | * This buffer contains samples at port's clock rate. |
| 147 | * The size of this buffer is the sum between port's samples per frame |
| 148 | * and bridge's samples per frame. |
| 149 | */ |
| 150 | pj_int16_t *rx_buf; /**< The RX buffer. */ |
| 151 | unsigned rx_buf_cap; /**< Max size, in samples */ |
| 152 | unsigned rx_buf_count; /**< # of samples in the buf. */ |
| 153 | |
| 154 | /* Mix buf is a temporary buffer used to mix all signal received |
| 155 | * by this port from all other ports. The mixed signal will be |
| 156 | * automatically adjusted to the appropriate level whenever |
| 157 | * there is possibility of clipping. |
| 158 | * |
| 159 | * This buffer contains samples at bridge's clock rate. |
| 160 | * The size of this buffer is equal to samples per frame of the bridge. |
| 161 | */ |
| 162 | |
| 163 | int mix_adj; /**< Adjustment level for mix_buf. */ |
| 164 | int last_mix_adj; /**< Last adjustment level. */ |
| 165 | pj_int32_t *mix_buf; /**< Total sum of signal. */ |
| 166 | |
| 167 | /* Tx buffer is a temporary buffer to be used when there's mismatch |
| 168 | * between port's clock rate or ptime with conference's sample rate |
| 169 | * or ptime. This buffer is used as the source of the sampling rate |
| 170 | * conversion AND/OR to buffer the samples until there are enough |
| 171 | * samples to fulfill a complete frame to be transmitted to the port. |
| 172 | * |
| 173 | * When both sample rate and ptime of the port match the bridge's |
| 174 | * settings, this buffer will not be created. |
| 175 | * |
| 176 | * This buffer contains samples at port's clock rate. |
| 177 | * The size of this buffer is the sum between port's samples per frame |
| 178 | * and bridge's samples per frame. |
| 179 | */ |
| 180 | pj_int16_t *tx_buf; /**< Tx buffer. */ |
| 181 | unsigned tx_buf_cap; /**< Max size, in samples. */ |
| 182 | unsigned tx_buf_count; /**< # of samples in the buffer. */ |
| 183 | |
| 184 | /* When the port is not receiving signal from any other ports (e.g. when |
| 185 | * no other ports is transmitting to this port), the bridge periodically |
| 186 | * transmit NULL frame to the port to keep the port "alive" (for example, |
| 187 | * a stream port needs this heart-beat to periodically transmit silence |
| 188 | * frame to keep NAT binding alive). |
| 189 | * |
| 190 | * This NULL frame should be sent to the port at the port's ptime rate. |
| 191 | * So if the port's ptime is greater than the bridge's ptime, the bridge |
| 192 | * needs to delay the NULL frame until it's the right time to do so. |
| 193 | * |
| 194 | * This variable keeps track of how many pending NULL samples are being |
| 195 | * "held" for this port. Once this value reaches samples_per_frame |
| 196 | * value of the port, a NULL frame is sent. The samples value on this |
| 197 | * variable is clocked at the port's clock rate. |
| 198 | */ |
| 199 | unsigned tx_heart_beat; |
| 200 | |
| 201 | /* Delay buffer is a special buffer for sound device port (port 0, master |
| 202 | * port) and other passive ports (sound device port is also passive port). |
| 203 | * |
| 204 | * We need the delay buffer because we can not expect the mic and speaker |
| 205 | * thread to run equally after one another. In most systems, each thread |
| 206 | * will run multiple times before the other thread gains execution time. |
| 207 | * For example, in my system, mic thread is called three times, then |
| 208 | * speaker thread is called three times, and so on. This we call burst. |
| 209 | * |
| 210 | * There is also possibility of drift, unbalanced rate between put_frame |
| 211 | * and get_frame operation, in passive ports. If drift happens, snd_buf |
| 212 | * needs to be expanded or shrinked. |
| 213 | * |
| 214 | * Burst and drift are handled by delay buffer. |
| 215 | */ |
| 216 | pjmedia_delay_buf *delay_buf; |
| 217 | }; |
| 218 | |
| 219 | |
| 220 | /* |
| 221 | * Conference bridge. |
| 222 | */ |
| 223 | struct pjmedia_conf |
| 224 | { |
| 225 | unsigned options; /**< Bitmask options. */ |
| 226 | unsigned max_ports; /**< Maximum ports. */ |
| 227 | unsigned port_cnt; /**< Current number of ports. */ |
| 228 | unsigned connect_cnt; /**< Total number of connections */ |
| 229 | pjmedia_snd_port *snd_dev_port; /**< Sound device port. */ |
| 230 | pjmedia_port *master_port; /**< Port zero's port. */ |
| 231 | char master_name_buf[80]; /**< Port0 name buffer. */ |
| 232 | pj_mutex_t *mutex; /**< Conference mutex. */ |
| 233 | struct conf_port **ports; /**< Array of ports. */ |
| 234 | unsigned clock_rate; /**< Sampling rate. */ |
| 235 | unsigned channel_count;/**< Number of channels (1=mono). */ |
| 236 | unsigned samples_per_frame; /**< Samples per frame. */ |
| 237 | unsigned bits_per_sample; /**< Bits per sample. */ |
| 238 | }; |
| 239 | |
| 240 | |
| 241 | /* Prototypes */ |
| 242 | static pj_status_t put_frame(pjmedia_port *this_port, |
| 243 | pjmedia_frame *frame); |
| 244 | static pj_status_t get_frame(pjmedia_port *this_port, |
| 245 | pjmedia_frame *frame); |
| 246 | static pj_status_t get_frame_pasv(pjmedia_port *this_port, |
| 247 | pjmedia_frame *frame); |
| 248 | static pj_status_t destroy_port(pjmedia_port *this_port); |
| 249 | static pj_status_t destroy_port_pasv(pjmedia_port *this_port); |
| 250 | |
| 251 | |
| 252 | /* |
| 253 | * Create port. |
| 254 | */ |
| 255 | static pj_status_t create_conf_port( pj_pool_t *pool, |
| 256 | pjmedia_conf *conf, |
| 257 | pjmedia_port *port, |
| 258 | const pj_str_t *name, |
| 259 | struct conf_port **p_conf_port) |
| 260 | { |
| 261 | struct conf_port *conf_port; |
| 262 | pj_status_t status; |
| 263 | |
| 264 | /* Create port. */ |
| 265 | conf_port = PJ_POOL_ZALLOC_T(pool, struct conf_port); |
| 266 | PJ_ASSERT_RETURN(conf_port, PJ_ENOMEM); |
| 267 | |
| 268 | /* Set name */ |
| 269 | pj_strdup_with_null(pool, &conf_port->name, name); |
| 270 | |
| 271 | /* Default has tx and rx enabled. */ |
| 272 | conf_port->rx_setting = PJMEDIA_PORT_ENABLE; |
| 273 | conf_port->tx_setting = PJMEDIA_PORT_ENABLE; |
| 274 | |
| 275 | /* Default level adjustment is 128 (which means no adjustment) */ |
| 276 | conf_port->tx_adj_level = NORMAL_LEVEL; |
| 277 | conf_port->rx_adj_level = NORMAL_LEVEL; |
| 278 | |
| 279 | /* Create transmit flag array */ |
| 280 | conf_port->listener_slots = (SLOT_TYPE*) |
| 281 | pj_pool_zalloc(pool, |
| 282 | conf->max_ports * sizeof(SLOT_TYPE)); |
| 283 | PJ_ASSERT_RETURN(conf_port->listener_slots, PJ_ENOMEM); |
| 284 | |
| 285 | /* Save some port's infos, for convenience. */ |
| 286 | if (port) { |
| 287 | pjmedia_audio_format_detail *afd; |
| 288 | |
| 289 | afd = pjmedia_format_get_audio_format_detail(&port->info.fmt, 1); |
| 290 | conf_port->port = port; |
| 291 | conf_port->clock_rate = afd->clock_rate; |
| 292 | conf_port->samples_per_frame = PJMEDIA_AFD_SPF(afd); |
| 293 | conf_port->channel_count = afd->channel_count; |
| 294 | } else { |
| 295 | conf_port->port = NULL; |
| 296 | conf_port->clock_rate = conf->clock_rate; |
| 297 | conf_port->samples_per_frame = conf->samples_per_frame; |
| 298 | conf_port->channel_count = conf->channel_count; |
| 299 | } |
| 300 | |
| 301 | /* If port's clock rate is different than conference's clock rate, |
| 302 | * create a resample sessions. |
| 303 | */ |
| 304 | if (conf_port->clock_rate != conf->clock_rate) { |
| 305 | |
| 306 | pj_bool_t high_quality; |
| 307 | pj_bool_t large_filter; |
| 308 | |
| 309 | high_quality = ((conf->options & PJMEDIA_CONF_USE_LINEAR)==0); |
| 310 | large_filter = ((conf->options & PJMEDIA_CONF_SMALL_FILTER)==0); |
| 311 | |
| 312 | /* Create resample for rx buffer. */ |
| 313 | status = pjmedia_resample_create( pool, |
| 314 | high_quality, |
| 315 | large_filter, |
| 316 | conf->channel_count, |
| 317 | conf_port->clock_rate,/* Rate in */ |
| 318 | conf->clock_rate, /* Rate out */ |
| 319 | conf->samples_per_frame * |
| 320 | conf_port->clock_rate / |
| 321 | conf->clock_rate, |
| 322 | &conf_port->rx_resample); |
| 323 | if (status != PJ_SUCCESS) |
| 324 | return status; |
| 325 | |
| 326 | |
| 327 | /* Create resample for tx buffer. */ |
| 328 | status = pjmedia_resample_create(pool, |
| 329 | high_quality, |
| 330 | large_filter, |
| 331 | conf->channel_count, |
| 332 | conf->clock_rate, /* Rate in */ |
| 333 | conf_port->clock_rate, /* Rate out */ |
| 334 | conf->samples_per_frame, |
| 335 | &conf_port->tx_resample); |
| 336 | if (status != PJ_SUCCESS) |
| 337 | return status; |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | * Initialize rx and tx buffer, only when port's samples per frame or |
| 342 | * port's clock rate or channel number is different then the conference |
| 343 | * bridge settings. |
| 344 | */ |
| 345 | if (conf_port->clock_rate != conf->clock_rate || |
| 346 | conf_port->channel_count != conf->channel_count || |
| 347 | conf_port->samples_per_frame != conf->samples_per_frame) |
| 348 | { |
| 349 | unsigned port_ptime, conf_ptime, buff_ptime; |
| 350 | |
| 351 | port_ptime = conf_port->samples_per_frame / conf_port->channel_count * |
| 352 | 1000 / conf_port->clock_rate; |
| 353 | conf_ptime = conf->samples_per_frame / conf->channel_count * |
| 354 | 1000 / conf->clock_rate; |
| 355 | |
| 356 | /* Calculate the size (in ptime) for the port buffer according to |
| 357 | * this formula: |
| 358 | * - if either ptime is an exact multiple of the other, then use |
| 359 | * the larger ptime (e.g. 20ms and 40ms, use 40ms). |
| 360 | * - if not, then the ptime is sum of both ptimes (e.g. 20ms |
| 361 | * and 30ms, use 50ms) |
| 362 | */ |
| 363 | if (port_ptime > conf_ptime) { |
| 364 | buff_ptime = port_ptime; |
| 365 | if (port_ptime % conf_ptime) |
| 366 | buff_ptime += conf_ptime; |
| 367 | } else { |
| 368 | buff_ptime = conf_ptime; |
| 369 | if (conf_ptime % port_ptime) |
| 370 | buff_ptime += port_ptime; |
| 371 | } |
| 372 | |
| 373 | /* Create RX buffer. */ |
| 374 | //conf_port->rx_buf_cap = (unsigned)(conf_port->samples_per_frame + |
| 375 | // conf->samples_per_frame * |
| 376 | // conf_port->clock_rate * 1.0 / |
| 377 | // conf->clock_rate + 0.5); |
| 378 | conf_port->rx_buf_cap = conf_port->clock_rate * buff_ptime / 1000; |
| 379 | if (conf_port->channel_count > conf->channel_count) |
| 380 | conf_port->rx_buf_cap *= conf_port->channel_count; |
| 381 | else |
| 382 | conf_port->rx_buf_cap *= conf->channel_count; |
| 383 | |
| 384 | conf_port->rx_buf_count = 0; |
| 385 | conf_port->rx_buf = (pj_int16_t*) |
| 386 | pj_pool_alloc(pool, conf_port->rx_buf_cap * |
| 387 | sizeof(conf_port->rx_buf[0])); |
| 388 | PJ_ASSERT_RETURN(conf_port->rx_buf, PJ_ENOMEM); |
| 389 | |
| 390 | /* Create TX buffer. */ |
| 391 | conf_port->tx_buf_cap = conf_port->rx_buf_cap; |
| 392 | conf_port->tx_buf_count = 0; |
| 393 | conf_port->tx_buf = (pj_int16_t*) |
| 394 | pj_pool_alloc(pool, conf_port->tx_buf_cap * |
| 395 | sizeof(conf_port->tx_buf[0])); |
| 396 | PJ_ASSERT_RETURN(conf_port->tx_buf, PJ_ENOMEM); |
| 397 | } |
| 398 | |
| 399 | |
| 400 | /* Create mix buffer. */ |
| 401 | conf_port->mix_buf = (pj_int32_t*) |
| 402 | pj_pool_zalloc(pool, conf->samples_per_frame * |
| 403 | sizeof(conf_port->mix_buf[0])); |
| 404 | PJ_ASSERT_RETURN(conf_port->mix_buf, PJ_ENOMEM); |
| 405 | conf_port->last_mix_adj = NORMAL_LEVEL; |
| 406 | |
| 407 | |
| 408 | /* Done */ |
| 409 | *p_conf_port = conf_port; |
| 410 | return PJ_SUCCESS; |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* |
| 415 | * Add passive port. |
| 416 | */ |
| 417 | static pj_status_t create_pasv_port( pjmedia_conf *conf, |
| 418 | pj_pool_t *pool, |
| 419 | const pj_str_t *name, |
| 420 | pjmedia_port *port, |
| 421 | struct conf_port **p_conf_port) |
| 422 | { |
| 423 | struct conf_port *conf_port; |
| 424 | pj_status_t status; |
| 425 | unsigned ptime; |
| 426 | |
| 427 | /* Create port */ |
| 428 | status = create_conf_port(pool, conf, port, name, &conf_port); |
| 429 | if (status != PJ_SUCCESS) |
| 430 | return status; |
| 431 | |
| 432 | /* Passive port has delay buf. */ |
| 433 | ptime = conf->samples_per_frame * 1000 / conf->clock_rate / |
| 434 | conf->channel_count; |
| 435 | status = pjmedia_delay_buf_create(pool, name->ptr, |
| 436 | conf->clock_rate, |
| 437 | conf->samples_per_frame, |
| 438 | conf->channel_count, |
| 439 | RX_BUF_COUNT * ptime, /* max delay */ |
| 440 | 0, /* options */ |
| 441 | &conf_port->delay_buf); |
| 442 | if (status != PJ_SUCCESS) |
| 443 | return status; |
| 444 | |
| 445 | *p_conf_port = conf_port; |
| 446 | |
| 447 | return PJ_SUCCESS; |
| 448 | } |
| 449 | |
| 450 | |
| 451 | /* |
| 452 | * Create port zero for the sound device. |
| 453 | */ |
| 454 | static pj_status_t create_sound_port( pj_pool_t *pool, |
| 455 | pjmedia_conf *conf ) |
| 456 | { |
| 457 | struct conf_port *conf_port; |
| 458 | pj_str_t name = { "Master/sound", 12 }; |
| 459 | pj_status_t status; |
| 460 | |
| 461 | |
| 462 | status = create_pasv_port(conf, pool, &name, NULL, &conf_port); |
| 463 | if (status != PJ_SUCCESS) |
| 464 | return status; |
| 465 | |
| 466 | |
| 467 | /* Create sound device port: */ |
| 468 | |
| 469 | if ((conf->options & PJMEDIA_CONF_NO_DEVICE) == 0) { |
| 470 | pjmedia_aud_stream *strm; |
| 471 | pjmedia_aud_param param; |
| 472 | |
| 473 | /* |
| 474 | * If capture is disabled then create player only port. |
| 475 | * Otherwise create bidirectional sound device port. |
| 476 | */ |
| 477 | if (conf->options & PJMEDIA_CONF_NO_MIC) { |
| 478 | status = pjmedia_snd_port_create_player(pool, -1, conf->clock_rate, |
| 479 | conf->channel_count, |
| 480 | conf->samples_per_frame, |
| 481 | conf->bits_per_sample, |
| 482 | 0, /* options */ |
| 483 | &conf->snd_dev_port); |
| 484 | |
| 485 | } else { |
| 486 | status = pjmedia_snd_port_create( pool, -1, -1, conf->clock_rate, |
| 487 | conf->channel_count, |
| 488 | conf->samples_per_frame, |
| 489 | conf->bits_per_sample, |
| 490 | 0, /* Options */ |
| 491 | &conf->snd_dev_port); |
| 492 | |
| 493 | } |
| 494 | |
| 495 | if (status != PJ_SUCCESS) |
| 496 | return status; |
| 497 | |
| 498 | strm = pjmedia_snd_port_get_snd_stream(conf->snd_dev_port); |
| 499 | status = pjmedia_aud_stream_get_param(strm, ¶m); |
| 500 | if (status == PJ_SUCCESS) { |
| 501 | pjmedia_aud_dev_info snd_dev_info; |
| 502 | if (conf->options & PJMEDIA_CONF_NO_MIC) |
| 503 | pjmedia_aud_dev_get_info(param.play_id, &snd_dev_info); |
| 504 | else |
| 505 | pjmedia_aud_dev_get_info(param.rec_id, &snd_dev_info); |
| 506 | pj_strdup2_with_null(pool, &conf_port->name, snd_dev_info.name); |
| 507 | } |
| 508 | |
| 509 | PJ_LOG(5,(THIS_FILE, "Sound device successfully created for port 0")); |
| 510 | } |
| 511 | |
| 512 | |
| 513 | /* Add the port to the bridge */ |
| 514 | conf->ports[0] = conf_port; |
| 515 | conf->port_cnt++; |
| 516 | |
| 517 | return PJ_SUCCESS; |
| 518 | } |
| 519 | |
| 520 | /* |
| 521 | * Create conference bridge. |
| 522 | */ |
| 523 | PJ_DEF(pj_status_t) pjmedia_conf_create( pj_pool_t *pool, |
| 524 | unsigned max_ports, |
| 525 | unsigned clock_rate, |
| 526 | unsigned channel_count, |
| 527 | unsigned samples_per_frame, |
| 528 | unsigned bits_per_sample, |
| 529 | unsigned options, |
| 530 | pjmedia_conf **p_conf ) |
| 531 | { |
| 532 | pjmedia_conf *conf; |
| 533 | const pj_str_t name = { "Conf", 4 }; |
| 534 | pj_status_t status; |
| 535 | |
| 536 | /* Can only accept 16bits per sample, for now.. */ |
| 537 | PJ_ASSERT_RETURN(bits_per_sample == 16, PJ_EINVAL); |
| 538 | |
| 539 | PJ_LOG(5,(THIS_FILE, "Creating conference bridge with %d ports", |
| 540 | max_ports)); |
| 541 | |
| 542 | /* Create and init conf structure. */ |
| 543 | conf = PJ_POOL_ZALLOC_T(pool, pjmedia_conf); |
| 544 | PJ_ASSERT_RETURN(conf, PJ_ENOMEM); |
| 545 | |
| 546 | conf->ports = (struct conf_port**) |
| 547 | pj_pool_zalloc(pool, max_ports*sizeof(void*)); |
| 548 | PJ_ASSERT_RETURN(conf->ports, PJ_ENOMEM); |
| 549 | |
| 550 | conf->options = options; |
| 551 | conf->max_ports = max_ports; |
| 552 | conf->clock_rate = clock_rate; |
| 553 | conf->channel_count = channel_count; |
| 554 | conf->samples_per_frame = samples_per_frame; |
| 555 | conf->bits_per_sample = bits_per_sample; |
| 556 | |
| 557 | |
| 558 | /* Create and initialize the master port interface. */ |
| 559 | conf->master_port = PJ_POOL_ZALLOC_T(pool, pjmedia_port); |
| 560 | PJ_ASSERT_RETURN(conf->master_port, PJ_ENOMEM); |
| 561 | |
| 562 | pjmedia_port_info_init(&conf->master_port->info, &name, SIGNATURE, |
| 563 | clock_rate, channel_count, bits_per_sample, |
| 564 | samples_per_frame); |
| 565 | |
| 566 | conf->master_port->port_data.pdata = conf; |
| 567 | conf->master_port->port_data.ldata = 0; |
| 568 | |
| 569 | conf->master_port->get_frame = &get_frame; |
| 570 | conf->master_port->put_frame = &put_frame; |
| 571 | conf->master_port->on_destroy = &destroy_port; |
| 572 | |
| 573 | |
| 574 | /* Create port zero for sound device. */ |
| 575 | status = create_sound_port(pool, conf); |
| 576 | if (status != PJ_SUCCESS) { |
| 577 | pjmedia_conf_destroy(conf); |
| 578 | return status; |
| 579 | } |
| 580 | |
| 581 | /* Create mutex. */ |
| 582 | status = pj_mutex_create_recursive(pool, "conf", &conf->mutex); |
| 583 | if (status != PJ_SUCCESS) { |
| 584 | pjmedia_conf_destroy(conf); |
| 585 | return status; |
| 586 | } |
| 587 | |
| 588 | /* If sound device was created, connect sound device to the |
| 589 | * master port. |
| 590 | */ |
| 591 | if (conf->snd_dev_port) { |
| 592 | status = pjmedia_snd_port_connect( conf->snd_dev_port, |
| 593 | conf->master_port ); |
| 594 | if (status != PJ_SUCCESS) { |
| 595 | pjmedia_conf_destroy(conf); |
| 596 | return status; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | |
| 601 | /* Done */ |
| 602 | |
| 603 | *p_conf = conf; |
| 604 | |
| 605 | return PJ_SUCCESS; |
| 606 | } |
| 607 | |
| 608 | |
| 609 | /* |
| 610 | * Pause sound device. |
| 611 | */ |
| 612 | static pj_status_t pause_sound( pjmedia_conf *conf ) |
| 613 | { |
| 614 | /* Do nothing. */ |
| 615 | PJ_UNUSED_ARG(conf); |
| 616 | return PJ_SUCCESS; |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * Resume sound device. |
| 621 | */ |
| 622 | static pj_status_t resume_sound( pjmedia_conf *conf ) |
| 623 | { |
| 624 | /* Do nothing. */ |
| 625 | PJ_UNUSED_ARG(conf); |
| 626 | return PJ_SUCCESS; |
| 627 | } |
| 628 | |
| 629 | |
| 630 | /** |
| 631 | * Destroy conference bridge. |
| 632 | */ |
| 633 | PJ_DEF(pj_status_t) pjmedia_conf_destroy( pjmedia_conf *conf ) |
| 634 | { |
| 635 | unsigned i, ci; |
| 636 | |
| 637 | PJ_ASSERT_RETURN(conf != NULL, PJ_EINVAL); |
| 638 | |
| 639 | /* Destroy sound device port. */ |
| 640 | if (conf->snd_dev_port) { |
| 641 | pjmedia_snd_port_destroy(conf->snd_dev_port); |
| 642 | conf->snd_dev_port = NULL; |
| 643 | } |
| 644 | |
| 645 | /* Destroy delay buf of all (passive) ports. */ |
| 646 | for (i=0, ci=0; i<conf->max_ports && ci<conf->port_cnt; ++i) { |
| 647 | struct conf_port *cport; |
| 648 | |
| 649 | cport = conf->ports[i]; |
| 650 | if (!cport) |
| 651 | continue; |
| 652 | |
| 653 | ++ci; |
| 654 | if (cport->delay_buf) { |
| 655 | pjmedia_delay_buf_destroy(cport->delay_buf); |
| 656 | cport->delay_buf = NULL; |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | /* Destroy mutex */ |
| 661 | if (conf->mutex) |
| 662 | pj_mutex_destroy(conf->mutex); |
| 663 | |
| 664 | return PJ_SUCCESS; |
| 665 | } |
| 666 | |
| 667 | |
| 668 | /* |
| 669 | * Destroy the master port (will destroy the conference) |
| 670 | */ |
| 671 | static pj_status_t destroy_port(pjmedia_port *this_port) |
| 672 | { |
| 673 | pjmedia_conf *conf = (pjmedia_conf*) this_port->port_data.pdata; |
| 674 | return pjmedia_conf_destroy(conf); |
| 675 | } |
| 676 | |
| 677 | static pj_status_t destroy_port_pasv(pjmedia_port *this_port) { |
| 678 | pjmedia_conf *conf = (pjmedia_conf*) this_port->port_data.pdata; |
| 679 | struct conf_port *port = conf->ports[this_port->port_data.ldata]; |
| 680 | pj_status_t status; |
| 681 | |
| 682 | status = pjmedia_delay_buf_destroy(port->delay_buf); |
| 683 | if (status == PJ_SUCCESS) |
| 684 | port->delay_buf = NULL; |
| 685 | |
| 686 | return status; |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Get port zero interface. |
| 691 | */ |
| 692 | PJ_DEF(pjmedia_port*) pjmedia_conf_get_master_port(pjmedia_conf *conf) |
| 693 | { |
| 694 | /* Sanity check. */ |
| 695 | PJ_ASSERT_RETURN(conf != NULL, NULL); |
| 696 | |
| 697 | /* Can only return port interface when PJMEDIA_CONF_NO_DEVICE was |
| 698 | * present in the option. |
| 699 | */ |
| 700 | PJ_ASSERT_RETURN((conf->options & PJMEDIA_CONF_NO_DEVICE) != 0, NULL); |
| 701 | |
| 702 | return conf->master_port; |
| 703 | } |
| 704 | |
| 705 | |
| 706 | /* |
| 707 | * Set master port name. |
| 708 | */ |
| 709 | PJ_DEF(pj_status_t) pjmedia_conf_set_port0_name(pjmedia_conf *conf, |
| 710 | const pj_str_t *name) |
| 711 | { |
| 712 | pj_size_t len; |
| 713 | |
| 714 | /* Sanity check. */ |
| 715 | PJ_ASSERT_RETURN(conf != NULL && name != NULL, PJ_EINVAL); |
| 716 | |
| 717 | len = name->slen; |
| 718 | if (len > sizeof(conf->master_name_buf)) |
| 719 | len = sizeof(conf->master_name_buf); |
| 720 | |
| 721 | if (len > 0) pj_memcpy(conf->master_name_buf, name->ptr, len); |
| 722 | |
| 723 | conf->ports[0]->name.ptr = conf->master_name_buf; |
| 724 | conf->ports[0]->name.slen = len; |
| 725 | |
| 726 | if (conf->master_port) |
| 727 | conf->master_port->info.name = conf->ports[0]->name; |
| 728 | |
| 729 | return PJ_SUCCESS; |
| 730 | } |
| 731 | |
| 732 | /* |
| 733 | * Add stream port to the conference bridge. |
| 734 | */ |
| 735 | PJ_DEF(pj_status_t) pjmedia_conf_add_port( pjmedia_conf *conf, |
| 736 | pj_pool_t *pool, |
| 737 | pjmedia_port *strm_port, |
| 738 | const pj_str_t *port_name, |
| 739 | unsigned *p_port ) |
| 740 | { |
| 741 | struct conf_port *conf_port; |
| 742 | unsigned index; |
| 743 | pj_status_t status; |
| 744 | |
| 745 | PJ_ASSERT_RETURN(conf && pool && strm_port, PJ_EINVAL); |
| 746 | |
| 747 | /* If port_name is not specified, use the port's name */ |
| 748 | if (!port_name) |
| 749 | port_name = &strm_port->info.name; |
| 750 | |
| 751 | /* For this version of PJMEDIA, channel(s) number MUST be: |
| 752 | * - same between port & conference bridge. |
| 753 | * - monochannel on port or conference bridge. |
| 754 | */ |
| 755 | if (PJMEDIA_PIA_CCNT(&strm_port->info) != conf->channel_count && |
| 756 | (PJMEDIA_PIA_CCNT(&strm_port->info) != 1 && |
| 757 | conf->channel_count != 1)) |
| 758 | { |
| 759 | pj_assert(!"Number of channels mismatch"); |
| 760 | return PJMEDIA_ENCCHANNEL; |
| 761 | } |
| 762 | |
| 763 | pj_mutex_lock(conf->mutex); |
| 764 | |
| 765 | if (conf->port_cnt >= conf->max_ports) { |
| 766 | pj_assert(!"Too many ports"); |
| 767 | pj_mutex_unlock(conf->mutex); |
| 768 | return PJ_ETOOMANY; |
| 769 | } |
| 770 | |
| 771 | /* Find empty port in the conference bridge. */ |
| 772 | for (index=0; index < conf->max_ports; ++index) { |
| 773 | if (conf->ports[index] == NULL) |
| 774 | break; |
| 775 | } |
| 776 | |
| 777 | pj_assert(index != conf->max_ports); |
| 778 | |
| 779 | /* Create conf port structure. */ |
| 780 | status = create_conf_port(pool, conf, strm_port, port_name, &conf_port); |
| 781 | if (status != PJ_SUCCESS) { |
| 782 | pj_mutex_unlock(conf->mutex); |
| 783 | return status; |
| 784 | } |
| 785 | |
| 786 | /* Put the port. */ |
| 787 | conf->ports[index] = conf_port; |
| 788 | conf->port_cnt++; |
| 789 | |
| 790 | /* Done. */ |
| 791 | if (p_port) { |
| 792 | *p_port = index; |
| 793 | } |
| 794 | |
| 795 | pj_mutex_unlock(conf->mutex); |
| 796 | |
| 797 | return PJ_SUCCESS; |
| 798 | } |
| 799 | |
| 800 | |
| 801 | /* |
| 802 | * Add passive port. |
| 803 | */ |
| 804 | PJ_DEF(pj_status_t) pjmedia_conf_add_passive_port( pjmedia_conf *conf, |
| 805 | pj_pool_t *pool, |
| 806 | const pj_str_t *name, |
| 807 | unsigned clock_rate, |
| 808 | unsigned channel_count, |
| 809 | unsigned samples_per_frame, |
| 810 | unsigned bits_per_sample, |
| 811 | unsigned options, |
| 812 | unsigned *p_slot, |
| 813 | pjmedia_port **p_port ) |
| 814 | { |
| 815 | struct conf_port *conf_port; |
| 816 | pjmedia_port *port; |
| 817 | unsigned index; |
| 818 | pj_str_t tmp; |
| 819 | pj_status_t status; |
| 820 | |
| 821 | PJ_LOG(1, (THIS_FILE, "This API has been deprecated since 1.3 and will " |
| 822 | "be removed in the future release!")); |
| 823 | |
| 824 | PJ_ASSERT_RETURN(conf && pool, PJ_EINVAL); |
| 825 | |
| 826 | /* For this version of PJMEDIA, channel(s) number MUST be: |
| 827 | * - same between port & conference bridge. |
| 828 | * - monochannel on port or conference bridge. |
| 829 | */ |
| 830 | if (channel_count != conf->channel_count && |
| 831 | (channel_count != 1 && conf->channel_count != 1)) |
| 832 | { |
| 833 | pj_assert(!"Number of channels mismatch"); |
| 834 | return PJMEDIA_ENCCHANNEL; |
| 835 | } |
| 836 | |
| 837 | /* For this version, options must be zero */ |
| 838 | PJ_ASSERT_RETURN(options == 0, PJ_EINVAL); |
| 839 | PJ_UNUSED_ARG(options); |
| 840 | |
| 841 | pj_mutex_lock(conf->mutex); |
| 842 | |
| 843 | if (conf->port_cnt >= conf->max_ports) { |
| 844 | pj_assert(!"Too many ports"); |
| 845 | pj_mutex_unlock(conf->mutex); |
| 846 | return PJ_ETOOMANY; |
| 847 | } |
| 848 | |
| 849 | /* Find empty port in the conference bridge. */ |
| 850 | for (index=0; index < conf->max_ports; ++index) { |
| 851 | if (conf->ports[index] == NULL) |
| 852 | break; |
| 853 | } |
| 854 | |
| 855 | pj_assert(index != conf->max_ports); |
| 856 | |
| 857 | if (name == NULL) { |
| 858 | name = &tmp; |
| 859 | |
| 860 | tmp.ptr = (char*) pj_pool_alloc(pool, 32); |
| 861 | tmp.slen = pj_ansi_snprintf(tmp.ptr, 32, "ConfPort#%d", index); |
| 862 | } |
| 863 | |
| 864 | /* Create and initialize the media port structure. */ |
| 865 | port = PJ_POOL_ZALLOC_T(pool, pjmedia_port); |
| 866 | PJ_ASSERT_RETURN(port, PJ_ENOMEM); |
| 867 | |
| 868 | pjmedia_port_info_init(&port->info, name, SIGNATURE_PORT, |
| 869 | clock_rate, channel_count, bits_per_sample, |
| 870 | samples_per_frame); |
| 871 | |
| 872 | port->port_data.pdata = conf; |
| 873 | port->port_data.ldata = index; |
| 874 | |
| 875 | port->get_frame = &get_frame_pasv; |
| 876 | port->put_frame = &put_frame; |
| 877 | port->on_destroy = &destroy_port_pasv; |
| 878 | |
| 879 | |
| 880 | /* Create conf port structure. */ |
| 881 | status = create_pasv_port(conf, pool, name, port, &conf_port); |
| 882 | if (status != PJ_SUCCESS) { |
| 883 | pj_mutex_unlock(conf->mutex); |
| 884 | return status; |
| 885 | } |
| 886 | |
| 887 | |
| 888 | /* Put the port. */ |
| 889 | conf->ports[index] = conf_port; |
| 890 | conf->port_cnt++; |
| 891 | |
| 892 | /* Done. */ |
| 893 | if (p_slot) |
| 894 | *p_slot = index; |
| 895 | if (p_port) |
| 896 | *p_port = port; |
| 897 | |
| 898 | pj_mutex_unlock(conf->mutex); |
| 899 | |
| 900 | return PJ_SUCCESS; |
| 901 | } |
| 902 | |
| 903 | |
| 904 | |
| 905 | /* |
| 906 | * Change TX and RX settings for the port. |
| 907 | */ |
| 908 | PJ_DEF(pj_status_t) pjmedia_conf_configure_port( pjmedia_conf *conf, |
| 909 | unsigned slot, |
| 910 | pjmedia_port_op tx, |
| 911 | pjmedia_port_op rx) |
| 912 | { |
| 913 | struct conf_port *conf_port; |
| 914 | |
| 915 | /* Check arguments */ |
| 916 | PJ_ASSERT_RETURN(conf && slot<conf->max_ports, PJ_EINVAL); |
| 917 | |
| 918 | pj_mutex_lock(conf->mutex); |
| 919 | |
| 920 | /* Port must be valid. */ |
| 921 | conf_port = conf->ports[slot]; |
| 922 | if (conf_port == NULL) { |
| 923 | pj_mutex_unlock(conf->mutex); |
| 924 | return PJ_EINVAL; |
| 925 | } |
| 926 | |
| 927 | conf_port = conf->ports[slot]; |
| 928 | |
| 929 | if (tx != PJMEDIA_PORT_NO_CHANGE) |
| 930 | conf_port->tx_setting = tx; |
| 931 | |
| 932 | if (rx != PJMEDIA_PORT_NO_CHANGE) |
| 933 | conf_port->rx_setting = rx; |
| 934 | |
| 935 | pj_mutex_unlock(conf->mutex); |
| 936 | |
| 937 | return PJ_SUCCESS; |
| 938 | } |
| 939 | |
| 940 | |
| 941 | /* |
| 942 | * Connect port. |
| 943 | */ |
| 944 | PJ_DEF(pj_status_t) pjmedia_conf_connect_port( pjmedia_conf *conf, |
| 945 | unsigned src_slot, |
| 946 | unsigned sink_slot, |
| 947 | int level ) |
| 948 | { |
| 949 | struct conf_port *src_port, *dst_port; |
| 950 | pj_bool_t start_sound = PJ_FALSE; |
| 951 | unsigned i; |
| 952 | |
| 953 | /* Check arguments */ |
| 954 | PJ_ASSERT_RETURN(conf && src_slot<conf->max_ports && |
| 955 | sink_slot<conf->max_ports, PJ_EINVAL); |
| 956 | |
| 957 | /* For now, level MUST be zero. */ |
| 958 | PJ_ASSERT_RETURN(level == 0, PJ_EINVAL); |
| 959 | |
| 960 | pj_mutex_lock(conf->mutex); |
| 961 | |
| 962 | /* Ports must be valid. */ |
| 963 | src_port = conf->ports[src_slot]; |
| 964 | dst_port = conf->ports[sink_slot]; |
| 965 | if (!src_port || !dst_port) { |
| 966 | pj_mutex_unlock(conf->mutex); |
| 967 | return PJ_EINVAL; |
| 968 | } |
| 969 | |
| 970 | /* Check if connection has been made */ |
| 971 | for (i=0; i<src_port->listener_cnt; ++i) { |
| 972 | if (src_port->listener_slots[i] == sink_slot) |
| 973 | break; |
| 974 | } |
| 975 | |
| 976 | if (i == src_port->listener_cnt) { |
| 977 | src_port->listener_slots[src_port->listener_cnt] = sink_slot; |
| 978 | ++conf->connect_cnt; |
| 979 | ++src_port->listener_cnt; |
| 980 | ++dst_port->transmitter_cnt; |
| 981 | |
| 982 | if (conf->connect_cnt == 1) |
| 983 | start_sound = 1; |
| 984 | |
| 985 | PJ_LOG(4,(THIS_FILE,"Port %d (%.*s) transmitting to port %d (%.*s)", |
| 986 | src_slot, |
| 987 | (int)src_port->name.slen, |
| 988 | src_port->name.ptr, |
| 989 | sink_slot, |
| 990 | (int)dst_port->name.slen, |
| 991 | dst_port->name.ptr)); |
| 992 | } |
| 993 | |
| 994 | pj_mutex_unlock(conf->mutex); |
| 995 | |
| 996 | /* Sound device must be started without mutex, otherwise the |
| 997 | * sound thread will deadlock (?) |
| 998 | */ |
| 999 | if (start_sound) |
| 1000 | resume_sound(conf); |
| 1001 | |
| 1002 | return PJ_SUCCESS; |
| 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | /* |
| 1007 | * Disconnect port |
| 1008 | */ |
| 1009 | PJ_DEF(pj_status_t) pjmedia_conf_disconnect_port( pjmedia_conf *conf, |
| 1010 | unsigned src_slot, |
| 1011 | unsigned sink_slot ) |
| 1012 | { |
| 1013 | struct conf_port *src_port, *dst_port; |
| 1014 | unsigned i; |
| 1015 | |
| 1016 | /* Check arguments */ |
| 1017 | PJ_ASSERT_RETURN(conf && src_slot<conf->max_ports && |
| 1018 | sink_slot<conf->max_ports, PJ_EINVAL); |
| 1019 | |
| 1020 | pj_mutex_lock(conf->mutex); |
| 1021 | |
| 1022 | /* Ports must be valid. */ |
| 1023 | src_port = conf->ports[src_slot]; |
| 1024 | dst_port = conf->ports[sink_slot]; |
| 1025 | if (!src_port || !dst_port) { |
| 1026 | pj_mutex_unlock(conf->mutex); |
| 1027 | return PJ_EINVAL; |
| 1028 | } |
| 1029 | |
| 1030 | /* Check if connection has been made */ |
| 1031 | for (i=0; i<src_port->listener_cnt; ++i) { |
| 1032 | if (src_port->listener_slots[i] == sink_slot) |
| 1033 | break; |
| 1034 | } |
| 1035 | |
| 1036 | if (i != src_port->listener_cnt) { |
| 1037 | pj_assert(src_port->listener_cnt > 0 && |
| 1038 | src_port->listener_cnt < conf->max_ports); |
| 1039 | pj_assert(dst_port->transmitter_cnt > 0 && |
| 1040 | dst_port->transmitter_cnt < conf->max_ports); |
| 1041 | pj_array_erase(src_port->listener_slots, sizeof(SLOT_TYPE), |
| 1042 | src_port->listener_cnt, i); |
| 1043 | --conf->connect_cnt; |
| 1044 | --src_port->listener_cnt; |
| 1045 | --dst_port->transmitter_cnt; |
| 1046 | |
| 1047 | PJ_LOG(4,(THIS_FILE, |
| 1048 | "Port %d (%.*s) stop transmitting to port %d (%.*s)", |
| 1049 | src_slot, |
| 1050 | (int)src_port->name.slen, |
| 1051 | src_port->name.ptr, |
| 1052 | sink_slot, |
| 1053 | (int)dst_port->name.slen, |
| 1054 | dst_port->name.ptr)); |
| 1055 | |
| 1056 | /* if source port is passive port and has no listener, reset delaybuf */ |
| 1057 | if (src_port->delay_buf && src_port->listener_cnt == 0) |
| 1058 | pjmedia_delay_buf_reset(src_port->delay_buf); |
| 1059 | } |
| 1060 | |
| 1061 | pj_mutex_unlock(conf->mutex); |
| 1062 | |
| 1063 | if (conf->connect_cnt == 0) { |
| 1064 | pause_sound(conf); |
| 1065 | } |
| 1066 | |
| 1067 | return PJ_SUCCESS; |
| 1068 | } |
| 1069 | |
| 1070 | /* |
| 1071 | * Get number of ports currently registered to the conference bridge. |
| 1072 | */ |
| 1073 | PJ_DEF(unsigned) pjmedia_conf_get_port_count(pjmedia_conf *conf) |
| 1074 | { |
| 1075 | return conf->port_cnt; |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * Get total number of ports connections currently set up in the bridge. |
| 1080 | */ |
| 1081 | PJ_DEF(unsigned) pjmedia_conf_get_connect_count(pjmedia_conf *conf) |
| 1082 | { |
| 1083 | return conf->connect_cnt; |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | /* |
| 1088 | * Remove the specified port. |
| 1089 | */ |
| 1090 | PJ_DEF(pj_status_t) pjmedia_conf_remove_port( pjmedia_conf *conf, |
| 1091 | unsigned port ) |
| 1092 | { |
| 1093 | struct conf_port *conf_port; |
| 1094 | unsigned i; |
| 1095 | |
| 1096 | /* Check arguments */ |
| 1097 | PJ_ASSERT_RETURN(conf && port < conf->max_ports, PJ_EINVAL); |
| 1098 | |
| 1099 | /* Suspend the sound devices. |
| 1100 | * Don't want to remove port while port is being accessed by sound |
| 1101 | * device's threads! |
| 1102 | */ |
| 1103 | |
| 1104 | pj_mutex_lock(conf->mutex); |
| 1105 | |
| 1106 | /* Port must be valid. */ |
| 1107 | conf_port = conf->ports[port]; |
| 1108 | if (conf_port == NULL) { |
| 1109 | pj_mutex_unlock(conf->mutex); |
| 1110 | return PJ_EINVAL; |
| 1111 | } |
| 1112 | |
| 1113 | conf_port->tx_setting = PJMEDIA_PORT_DISABLE; |
| 1114 | conf_port->rx_setting = PJMEDIA_PORT_DISABLE; |
| 1115 | |
| 1116 | /* Remove this port from transmit array of other ports. */ |
| 1117 | for (i=0; i<conf->max_ports; ++i) { |
| 1118 | unsigned j; |
| 1119 | struct conf_port *src_port; |
| 1120 | |
| 1121 | src_port = conf->ports[i]; |
| 1122 | |
| 1123 | if (!src_port) |
| 1124 | continue; |
| 1125 | |
| 1126 | if (src_port->listener_cnt == 0) |
| 1127 | continue; |
| 1128 | |
| 1129 | for (j=0; j<src_port->listener_cnt; ++j) { |
| 1130 | if (src_port->listener_slots[j] == port) { |
| 1131 | pj_array_erase(src_port->listener_slots, sizeof(SLOT_TYPE), |
| 1132 | src_port->listener_cnt, j); |
| 1133 | pj_assert(conf->connect_cnt > 0); |
| 1134 | --conf->connect_cnt; |
| 1135 | --src_port->listener_cnt; |
| 1136 | break; |
| 1137 | } |
| 1138 | } |
| 1139 | } |
| 1140 | |
| 1141 | /* Update transmitter_cnt of ports we're transmitting to */ |
| 1142 | while (conf_port->listener_cnt) { |
| 1143 | unsigned dst_slot; |
| 1144 | struct conf_port *dst_port; |
| 1145 | |
| 1146 | dst_slot = conf_port->listener_slots[conf_port->listener_cnt-1]; |
| 1147 | dst_port = conf->ports[dst_slot]; |
| 1148 | --dst_port->transmitter_cnt; |
| 1149 | --conf_port->listener_cnt; |
| 1150 | pj_assert(conf->connect_cnt > 0); |
| 1151 | --conf->connect_cnt; |
| 1152 | } |
| 1153 | |
| 1154 | /* Destroy pjmedia port if this conf port is passive port, |
| 1155 | * i.e: has delay buf. |
| 1156 | */ |
| 1157 | if (conf_port->delay_buf) { |
| 1158 | pjmedia_port_destroy(conf_port->port); |
| 1159 | conf_port->port = NULL; |
| 1160 | } |
| 1161 | |
| 1162 | /* Remove the port. */ |
| 1163 | conf->ports[port] = NULL; |
| 1164 | --conf->port_cnt; |
| 1165 | |
| 1166 | pj_mutex_unlock(conf->mutex); |
| 1167 | |
| 1168 | |
| 1169 | /* Stop sound if there's no connection. */ |
| 1170 | if (conf->connect_cnt == 0) { |
| 1171 | pause_sound(conf); |
| 1172 | } |
| 1173 | |
| 1174 | return PJ_SUCCESS; |
| 1175 | } |
| 1176 | |
| 1177 | |
| 1178 | /* |
| 1179 | * Enum ports. |
| 1180 | */ |
| 1181 | PJ_DEF(pj_status_t) pjmedia_conf_enum_ports( pjmedia_conf *conf, |
| 1182 | unsigned ports[], |
| 1183 | unsigned *p_count ) |
| 1184 | { |
| 1185 | unsigned i, count=0; |
| 1186 | |
| 1187 | PJ_ASSERT_RETURN(conf && p_count && ports, PJ_EINVAL); |
| 1188 | |
| 1189 | /* Lock mutex */ |
| 1190 | pj_mutex_lock(conf->mutex); |
| 1191 | |
| 1192 | for (i=0; i<conf->max_ports && count<*p_count; ++i) { |
| 1193 | if (!conf->ports[i]) |
| 1194 | continue; |
| 1195 | |
| 1196 | ports[count++] = i; |
| 1197 | } |
| 1198 | |
| 1199 | /* Unlock mutex */ |
| 1200 | pj_mutex_unlock(conf->mutex); |
| 1201 | |
| 1202 | *p_count = count; |
| 1203 | return PJ_SUCCESS; |
| 1204 | } |
| 1205 | |
| 1206 | /* |
| 1207 | * Get port info |
| 1208 | */ |
| 1209 | PJ_DEF(pj_status_t) pjmedia_conf_get_port_info( pjmedia_conf *conf, |
| 1210 | unsigned slot, |
| 1211 | pjmedia_conf_port_info *info) |
| 1212 | { |
| 1213 | struct conf_port *conf_port; |
| 1214 | |
| 1215 | /* Check arguments */ |
| 1216 | PJ_ASSERT_RETURN(conf && slot<conf->max_ports, PJ_EINVAL); |
| 1217 | |
| 1218 | /* Lock mutex */ |
| 1219 | pj_mutex_lock(conf->mutex); |
| 1220 | |
| 1221 | /* Port must be valid. */ |
| 1222 | conf_port = conf->ports[slot]; |
| 1223 | if (conf_port == NULL) { |
| 1224 | pj_mutex_unlock(conf->mutex); |
| 1225 | return PJ_EINVAL; |
| 1226 | } |
| 1227 | |
| 1228 | info->slot = slot; |
| 1229 | info->name = conf_port->name; |
| 1230 | info->tx_setting = conf_port->tx_setting; |
| 1231 | info->rx_setting = conf_port->rx_setting; |
| 1232 | info->listener_cnt = conf_port->listener_cnt; |
| 1233 | info->listener_slots = conf_port->listener_slots; |
| 1234 | info->transmitter_cnt = conf_port->transmitter_cnt; |
| 1235 | info->clock_rate = conf_port->clock_rate; |
| 1236 | info->channel_count = conf_port->channel_count; |
| 1237 | info->samples_per_frame = conf_port->samples_per_frame; |
| 1238 | info->bits_per_sample = conf->bits_per_sample; |
| 1239 | info->tx_adj_level = conf_port->tx_adj_level - NORMAL_LEVEL; |
| 1240 | info->rx_adj_level = conf_port->rx_adj_level - NORMAL_LEVEL; |
| 1241 | |
| 1242 | /* Unlock mutex */ |
| 1243 | pj_mutex_unlock(conf->mutex); |
| 1244 | |
| 1245 | return PJ_SUCCESS; |
| 1246 | } |
| 1247 | |
| 1248 | |
| 1249 | PJ_DEF(pj_status_t) pjmedia_conf_get_ports_info(pjmedia_conf *conf, |
| 1250 | unsigned *size, |
| 1251 | pjmedia_conf_port_info info[]) |
| 1252 | { |
| 1253 | unsigned i, count=0; |
| 1254 | |
| 1255 | PJ_ASSERT_RETURN(conf && size && info, PJ_EINVAL); |
| 1256 | |
| 1257 | /* Lock mutex */ |
| 1258 | pj_mutex_lock(conf->mutex); |
| 1259 | |
| 1260 | for (i=0; i<conf->max_ports && count<*size; ++i) { |
| 1261 | if (!conf->ports[i]) |
| 1262 | continue; |
| 1263 | |
| 1264 | pjmedia_conf_get_port_info(conf, i, &info[count]); |
| 1265 | ++count; |
| 1266 | } |
| 1267 | |
| 1268 | /* Unlock mutex */ |
| 1269 | pj_mutex_unlock(conf->mutex); |
| 1270 | |
| 1271 | *size = count; |
| 1272 | return PJ_SUCCESS; |
| 1273 | } |
| 1274 | |
| 1275 | |
| 1276 | /* |
| 1277 | * Get signal level. |
| 1278 | */ |
| 1279 | PJ_DEF(pj_status_t) pjmedia_conf_get_signal_level( pjmedia_conf *conf, |
| 1280 | unsigned slot, |
| 1281 | unsigned *tx_level, |
| 1282 | unsigned *rx_level) |
| 1283 | { |
| 1284 | struct conf_port *conf_port; |
| 1285 | |
| 1286 | /* Check arguments */ |
| 1287 | PJ_ASSERT_RETURN(conf && slot<conf->max_ports, PJ_EINVAL); |
| 1288 | |
| 1289 | /* Lock mutex */ |
| 1290 | pj_mutex_lock(conf->mutex); |
| 1291 | |
| 1292 | /* Port must be valid. */ |
| 1293 | conf_port = conf->ports[slot]; |
| 1294 | if (conf_port == NULL) { |
| 1295 | pj_mutex_unlock(conf->mutex); |
| 1296 | return PJ_EINVAL; |
| 1297 | } |
| 1298 | |
| 1299 | if (tx_level != NULL) { |
| 1300 | *tx_level = conf_port->tx_level; |
| 1301 | } |
| 1302 | |
| 1303 | if (rx_level != NULL) |
| 1304 | *rx_level = conf_port->rx_level; |
| 1305 | |
| 1306 | /* Unlock mutex */ |
| 1307 | pj_mutex_unlock(conf->mutex); |
| 1308 | |
| 1309 | return PJ_SUCCESS; |
| 1310 | } |
| 1311 | |
| 1312 | |
| 1313 | /* |
| 1314 | * Adjust RX level of individual port. |
| 1315 | */ |
| 1316 | PJ_DEF(pj_status_t) pjmedia_conf_adjust_rx_level( pjmedia_conf *conf, |
| 1317 | unsigned slot, |
| 1318 | int adj_level ) |
| 1319 | { |
| 1320 | struct conf_port *conf_port; |
| 1321 | |
| 1322 | /* Check arguments */ |
| 1323 | PJ_ASSERT_RETURN(conf && slot<conf->max_ports, PJ_EINVAL); |
| 1324 | |
| 1325 | /* Value must be from -128 to +127 */ |
| 1326 | /* Disabled, you can put more than +127, at your own risk: |
| 1327 | PJ_ASSERT_RETURN(adj_level >= -128 && adj_level <= 127, PJ_EINVAL); |
| 1328 | */ |
| 1329 | PJ_ASSERT_RETURN(adj_level >= -128, PJ_EINVAL); |
| 1330 | |
| 1331 | /* Lock mutex */ |
| 1332 | pj_mutex_lock(conf->mutex); |
| 1333 | |
| 1334 | /* Port must be valid. */ |
| 1335 | conf_port = conf->ports[slot]; |
| 1336 | if (conf_port == NULL) { |
| 1337 | pj_mutex_unlock(conf->mutex); |
| 1338 | return PJ_EINVAL; |
| 1339 | } |
| 1340 | |
| 1341 | /* Set normalized adjustment level. */ |
| 1342 | conf_port->rx_adj_level = adj_level + NORMAL_LEVEL; |
| 1343 | |
| 1344 | /* Unlock mutex */ |
| 1345 | pj_mutex_unlock(conf->mutex); |
| 1346 | |
| 1347 | return PJ_SUCCESS; |
| 1348 | } |
| 1349 | |
| 1350 | |
| 1351 | /* |
| 1352 | * Adjust TX level of individual port. |
| 1353 | */ |
| 1354 | PJ_DEF(pj_status_t) pjmedia_conf_adjust_tx_level( pjmedia_conf *conf, |
| 1355 | unsigned slot, |
| 1356 | int adj_level ) |
| 1357 | { |
| 1358 | struct conf_port *conf_port; |
| 1359 | |
| 1360 | /* Check arguments */ |
| 1361 | PJ_ASSERT_RETURN(conf && slot<conf->max_ports, PJ_EINVAL); |
| 1362 | |
| 1363 | /* Value must be from -128 to +127 */ |
| 1364 | /* Disabled, you can put more than +127,, at your own risk: |
| 1365 | PJ_ASSERT_RETURN(adj_level >= -128 && adj_level <= 127, PJ_EINVAL); |
| 1366 | */ |
| 1367 | PJ_ASSERT_RETURN(adj_level >= -128, PJ_EINVAL); |
| 1368 | |
| 1369 | /* Lock mutex */ |
| 1370 | pj_mutex_lock(conf->mutex); |
| 1371 | |
| 1372 | /* Port must be valid. */ |
| 1373 | conf_port = conf->ports[slot]; |
| 1374 | if (conf_port == NULL) { |
| 1375 | pj_mutex_unlock(conf->mutex); |
| 1376 | return PJ_EINVAL; |
| 1377 | } |
| 1378 | |
| 1379 | /* Set normalized adjustment level. */ |
| 1380 | conf_port->tx_adj_level = adj_level + NORMAL_LEVEL; |
| 1381 | |
| 1382 | /* Unlock mutex */ |
| 1383 | pj_mutex_unlock(conf->mutex); |
| 1384 | |
| 1385 | return PJ_SUCCESS; |
| 1386 | } |
| 1387 | |
| 1388 | |
| 1389 | /* |
| 1390 | * Read from port. |
| 1391 | */ |
| 1392 | static pj_status_t read_port( pjmedia_conf *conf, |
| 1393 | struct conf_port *cport, pj_int16_t *frame, |
| 1394 | pj_size_t count, pjmedia_frame_type *type ) |
| 1395 | { |
| 1396 | |
| 1397 | pj_assert(count == conf->samples_per_frame); |
| 1398 | |
| 1399 | TRACE_((THIS_FILE, "read_port %.*s: count=%d", |
| 1400 | (int)cport->name.slen, cport->name.ptr, |
| 1401 | count)); |
| 1402 | |
| 1403 | /* |
| 1404 | * If port's samples per frame and sampling rate and channel count |
| 1405 | * matche conference bridge's settings, get the frame directly from |
| 1406 | * the port. |
| 1407 | */ |
| 1408 | if (cport->rx_buf_cap == 0) { |
| 1409 | pjmedia_frame f; |
| 1410 | pj_status_t status; |
| 1411 | |
| 1412 | f.buf = frame; |
| 1413 | f.size = count * BYTES_PER_SAMPLE; |
| 1414 | |
| 1415 | TRACE_((THIS_FILE, " get_frame %.*s: count=%d", |
| 1416 | (int)cport->name.slen, cport->name.ptr, |
| 1417 | count)); |
| 1418 | |
| 1419 | status = pjmedia_port_get_frame(cport->port, &f); |
| 1420 | |
| 1421 | *type = f.type; |
| 1422 | |
| 1423 | return status; |
| 1424 | |
| 1425 | } else { |
| 1426 | unsigned samples_req; |
| 1427 | |
| 1428 | /* Initialize frame type */ |
| 1429 | if (cport->rx_buf_count == 0) { |
| 1430 | *type = PJMEDIA_FRAME_TYPE_NONE; |
| 1431 | } else { |
| 1432 | /* we got some samples in the buffer */ |
| 1433 | *type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 1434 | } |
| 1435 | |
| 1436 | /* |
| 1437 | * If we don't have enough samples in rx_buf, read from the port |
| 1438 | * first. Remember that rx_buf may be in different clock rate and |
| 1439 | * channel count! |
| 1440 | */ |
| 1441 | |
| 1442 | samples_req = (unsigned) (count * 1.0 * |
| 1443 | cport->clock_rate / conf->clock_rate + 0.5); |
| 1444 | |
| 1445 | while (cport->rx_buf_count < samples_req) { |
| 1446 | |
| 1447 | pjmedia_frame f; |
| 1448 | pj_status_t status; |
| 1449 | |
| 1450 | f.buf = cport->rx_buf + cport->rx_buf_count; |
| 1451 | f.size = cport->samples_per_frame * BYTES_PER_SAMPLE; |
| 1452 | |
| 1453 | TRACE_((THIS_FILE, " get_frame, count=%d", |
| 1454 | cport->samples_per_frame)); |
| 1455 | |
| 1456 | status = pjmedia_port_get_frame(cport->port, &f); |
| 1457 | |
| 1458 | if (status != PJ_SUCCESS) { |
| 1459 | /* Fatal error! */ |
| 1460 | return status; |
| 1461 | } |
| 1462 | |
| 1463 | if (f.type != PJMEDIA_FRAME_TYPE_AUDIO) { |
| 1464 | TRACE_((THIS_FILE, " get_frame returned non-audio")); |
| 1465 | pjmedia_zero_samples( cport->rx_buf + cport->rx_buf_count, |
| 1466 | cport->samples_per_frame); |
| 1467 | } else { |
| 1468 | /* We've got at least one frame */ |
| 1469 | *type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 1470 | } |
| 1471 | |
| 1472 | /* Adjust channels */ |
| 1473 | if (cport->channel_count != conf->channel_count) { |
| 1474 | if (cport->channel_count == 1) { |
| 1475 | pjmedia_convert_channel_1ton((pj_int16_t*)f.buf, |
| 1476 | (const pj_int16_t*)f.buf, |
| 1477 | conf->channel_count, |
| 1478 | cport->samples_per_frame, |
| 1479 | 0); |
| 1480 | cport->rx_buf_count += (cport->samples_per_frame * |
| 1481 | conf->channel_count); |
| 1482 | } else { /* conf->channel_count == 1 */ |
| 1483 | pjmedia_convert_channel_nto1((pj_int16_t*)f.buf, |
| 1484 | (const pj_int16_t*)f.buf, |
| 1485 | cport->channel_count, |
| 1486 | cport->samples_per_frame, |
| 1487 | PJMEDIA_STEREO_MIX, 0); |
| 1488 | cport->rx_buf_count += (cport->samples_per_frame / |
| 1489 | cport->channel_count); |
| 1490 | } |
| 1491 | } else { |
| 1492 | cport->rx_buf_count += cport->samples_per_frame; |
| 1493 | } |
| 1494 | |
| 1495 | TRACE_((THIS_FILE, " rx buffer size is now %d", |
| 1496 | cport->rx_buf_count)); |
| 1497 | |
| 1498 | pj_assert(cport->rx_buf_count <= cport->rx_buf_cap); |
| 1499 | } |
| 1500 | |
| 1501 | /* |
| 1502 | * If port's clock_rate is different, resample. |
| 1503 | * Otherwise just copy. |
| 1504 | */ |
| 1505 | if (cport->clock_rate != conf->clock_rate) { |
| 1506 | |
| 1507 | unsigned src_count; |
| 1508 | |
| 1509 | TRACE_((THIS_FILE, " resample, input count=%d", |
| 1510 | pjmedia_resample_get_input_size(cport->rx_resample))); |
| 1511 | |
| 1512 | pjmedia_resample_run( cport->rx_resample,cport->rx_buf, frame); |
| 1513 | |
| 1514 | src_count = (unsigned)(count * 1.0 * cport->clock_rate / |
| 1515 | conf->clock_rate + 0.5); |
| 1516 | cport->rx_buf_count -= src_count; |
| 1517 | if (cport->rx_buf_count) { |
| 1518 | pjmedia_move_samples(cport->rx_buf, cport->rx_buf+src_count, |
| 1519 | cport->rx_buf_count); |
| 1520 | } |
| 1521 | |
| 1522 | TRACE_((THIS_FILE, " rx buffer size is now %d", |
| 1523 | cport->rx_buf_count)); |
| 1524 | |
| 1525 | } else { |
| 1526 | |
| 1527 | pjmedia_copy_samples(frame, cport->rx_buf, (unsigned)count); |
| 1528 | cport->rx_buf_count -= (unsigned)count; |
| 1529 | if (cport->rx_buf_count) { |
| 1530 | pjmedia_move_samples(cport->rx_buf, cport->rx_buf+count, |
| 1531 | cport->rx_buf_count); |
| 1532 | } |
| 1533 | } |
| 1534 | } |
| 1535 | |
| 1536 | return PJ_SUCCESS; |
| 1537 | } |
| 1538 | |
| 1539 | |
| 1540 | /* |
| 1541 | * Write the mixed signal to the port. |
| 1542 | */ |
| 1543 | static pj_status_t write_port(pjmedia_conf *conf, struct conf_port *cport, |
| 1544 | const pj_timestamp *timestamp, |
| 1545 | pjmedia_frame_type *frm_type) |
| 1546 | { |
| 1547 | pj_int16_t *buf; |
| 1548 | unsigned j, ts; |
| 1549 | pj_status_t status; |
| 1550 | pj_int32_t adj_level; |
| 1551 | pj_int32_t tx_level; |
| 1552 | unsigned dst_count; |
| 1553 | |
| 1554 | *frm_type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 1555 | |
| 1556 | /* If port is muted or nobody is transmitting to this port, |
| 1557 | * transmit NULL frame. |
| 1558 | */ |
| 1559 | if (cport->tx_setting == PJMEDIA_PORT_MUTE || cport->transmitter_cnt==0) { |
| 1560 | |
| 1561 | pjmedia_frame frame; |
| 1562 | |
| 1563 | /* Clear left-over samples in tx_buffer, if any, so that it won't |
| 1564 | * be transmitted next time we have audio signal. |
| 1565 | */ |
| 1566 | cport->tx_buf_count = 0; |
| 1567 | |
| 1568 | /* Add sample counts to heart-beat samples */ |
| 1569 | cport->tx_heart_beat += conf->samples_per_frame * cport->clock_rate / |
| 1570 | conf->clock_rate * |
| 1571 | cport->channel_count / conf->channel_count; |
| 1572 | |
| 1573 | /* Set frame timestamp */ |
| 1574 | frame.timestamp.u64 = timestamp->u64 * cport->clock_rate / |
| 1575 | conf->clock_rate; |
| 1576 | frame.type = PJMEDIA_FRAME_TYPE_NONE; |
| 1577 | frame.buf = NULL; |
| 1578 | frame.size = 0; |
| 1579 | |
| 1580 | /* Transmit heart-beat frames (may transmit more than one NULL frame |
| 1581 | * if port's ptime is less than bridge's ptime. |
| 1582 | */ |
| 1583 | if (cport->port && cport->port->put_frame) { |
| 1584 | while (cport->tx_heart_beat >= cport->samples_per_frame) { |
| 1585 | |
| 1586 | pjmedia_port_put_frame(cport->port, &frame); |
| 1587 | |
| 1588 | cport->tx_heart_beat -= cport->samples_per_frame; |
| 1589 | frame.timestamp.u64 += cport->samples_per_frame; |
| 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | cport->tx_level = 0; |
| 1594 | *frm_type = PJMEDIA_FRAME_TYPE_NONE; |
| 1595 | return PJ_SUCCESS; |
| 1596 | |
| 1597 | } else if (cport->tx_setting != PJMEDIA_PORT_ENABLE) { |
| 1598 | cport->tx_level = 0; |
| 1599 | *frm_type = PJMEDIA_FRAME_TYPE_NONE; |
| 1600 | return PJ_SUCCESS; |
| 1601 | } |
| 1602 | |
| 1603 | /* Reset heart-beat sample count */ |
| 1604 | cport->tx_heart_beat = 0; |
| 1605 | |
| 1606 | buf = (pj_int16_t*) cport->mix_buf; |
| 1607 | |
| 1608 | /* If there are sources in the mix buffer, convert the mixed samples |
| 1609 | * from 32bit to 16bit in the mixed samples itself. This is possible |
| 1610 | * because mixed sample is 32bit. |
| 1611 | * |
| 1612 | * In addition to this process, if we need to change the level of |
| 1613 | * TX signal, we adjust is here too. |
| 1614 | */ |
| 1615 | |
| 1616 | /* Calculate signal level and adjust the signal when needed. |
| 1617 | * Two adjustments performed at once: |
| 1618 | * 1. user setting adjustment (tx_adj_level). |
| 1619 | * 2. automatic adjustment of overflowed mixed buffer (mix_adj). |
| 1620 | */ |
| 1621 | |
| 1622 | /* Apply simple AGC to the mix_adj, the automatic adjust, to avoid |
| 1623 | * dramatic change in the level thus causing noise because the signal |
| 1624 | * is now not aligned with the signal from the previous frame. |
| 1625 | */ |
| 1626 | SIMPLE_AGC(cport->last_mix_adj, cport->mix_adj); |
| 1627 | cport->last_mix_adj = cport->mix_adj; |
| 1628 | |
| 1629 | /* adj_level = cport->tx_adj_level * cport->mix_adj / NORMAL_LEVEL;*/ |
| 1630 | adj_level = cport->tx_adj_level * cport->mix_adj; |
| 1631 | adj_level >>= 7; |
| 1632 | |
| 1633 | tx_level = 0; |
| 1634 | |
| 1635 | if (adj_level != NORMAL_LEVEL) { |
| 1636 | for (j=0; j<conf->samples_per_frame; ++j) { |
| 1637 | pj_int32_t itemp = cport->mix_buf[j]; |
| 1638 | |
| 1639 | /* Adjust the level */ |
| 1640 | /*itemp = itemp * adj_level / NORMAL_LEVEL;*/ |
| 1641 | itemp = (itemp * adj_level) >> 7; |
| 1642 | |
| 1643 | /* Clip the signal if it's too loud */ |
| 1644 | if (itemp > MAX_LEVEL) itemp = MAX_LEVEL; |
| 1645 | else if (itemp < MIN_LEVEL) itemp = MIN_LEVEL; |
| 1646 | |
| 1647 | /* Put back in the buffer. */ |
| 1648 | buf[j] = (pj_int16_t) itemp; |
| 1649 | |
| 1650 | tx_level += (buf[j]>=0? buf[j] : -buf[j]); |
| 1651 | } |
| 1652 | } else { |
| 1653 | for (j=0; j<conf->samples_per_frame; ++j) { |
| 1654 | buf[j] = (pj_int16_t) cport->mix_buf[j]; |
| 1655 | tx_level += (buf[j]>=0? buf[j] : -buf[j]); |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | tx_level /= conf->samples_per_frame; |
| 1660 | |
| 1661 | /* Convert level to 8bit complement ulaw */ |
| 1662 | tx_level = pjmedia_linear2ulaw(tx_level) ^ 0xff; |
| 1663 | |
| 1664 | cport->tx_level = tx_level; |
| 1665 | |
| 1666 | /* If port has the same clock_rate and samples_per_frame and |
| 1667 | * number of channels as the conference bridge, transmit the |
| 1668 | * frame as is. |
| 1669 | */ |
| 1670 | if (cport->clock_rate == conf->clock_rate && |
| 1671 | cport->samples_per_frame == conf->samples_per_frame && |
| 1672 | cport->channel_count == conf->channel_count) |
| 1673 | { |
| 1674 | if (cport->port != NULL) { |
| 1675 | pjmedia_frame frame; |
| 1676 | |
| 1677 | frame.type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 1678 | frame.buf = buf; |
| 1679 | frame.size = conf->samples_per_frame * BYTES_PER_SAMPLE; |
| 1680 | /* No need to adjust timestamp, port has the same |
| 1681 | * clock rate as conference bridge |
| 1682 | */ |
| 1683 | frame.timestamp = *timestamp; |
| 1684 | |
| 1685 | TRACE_((THIS_FILE, "put_frame %.*s, count=%d", |
| 1686 | (int)cport->name.slen, cport->name.ptr, |
| 1687 | frame.size / BYTES_PER_SAMPLE)); |
| 1688 | |
| 1689 | return pjmedia_port_put_frame(cport->port, &frame); |
| 1690 | } else |
| 1691 | return PJ_SUCCESS; |
| 1692 | } |
| 1693 | |
| 1694 | /* If it has different clock_rate, must resample. */ |
| 1695 | if (cport->clock_rate != conf->clock_rate) { |
| 1696 | pjmedia_resample_run( cport->tx_resample, buf, |
| 1697 | cport->tx_buf + cport->tx_buf_count ); |
| 1698 | dst_count = (unsigned)(conf->samples_per_frame * 1.0 * |
| 1699 | cport->clock_rate / conf->clock_rate + 0.5); |
| 1700 | } else { |
| 1701 | /* Same clock rate. |
| 1702 | * Just copy the samples to tx_buffer. |
| 1703 | */ |
| 1704 | pjmedia_copy_samples( cport->tx_buf + cport->tx_buf_count, |
| 1705 | buf, conf->samples_per_frame ); |
| 1706 | dst_count = conf->samples_per_frame; |
| 1707 | } |
| 1708 | |
| 1709 | /* Adjust channels */ |
| 1710 | if (cport->channel_count != conf->channel_count) { |
| 1711 | pj_int16_t *tx_buf = cport->tx_buf + cport->tx_buf_count; |
| 1712 | if (conf->channel_count == 1) { |
| 1713 | pjmedia_convert_channel_1ton(tx_buf, tx_buf, |
| 1714 | cport->channel_count, |
| 1715 | dst_count, 0); |
| 1716 | dst_count *= cport->channel_count; |
| 1717 | } else { /* cport->channel_count == 1 */ |
| 1718 | pjmedia_convert_channel_nto1(tx_buf, tx_buf, |
| 1719 | conf->channel_count, |
| 1720 | dst_count, PJMEDIA_STEREO_MIX, 0); |
| 1721 | dst_count /= conf->channel_count; |
| 1722 | } |
| 1723 | } |
| 1724 | |
| 1725 | cport->tx_buf_count += dst_count; |
| 1726 | |
| 1727 | pj_assert(cport->tx_buf_count <= cport->tx_buf_cap); |
| 1728 | |
| 1729 | /* Transmit while we have enough frame in the tx_buf. */ |
| 1730 | status = PJ_SUCCESS; |
| 1731 | ts = 0; |
| 1732 | while (cport->tx_buf_count >= cport->samples_per_frame && |
| 1733 | status == PJ_SUCCESS) |
| 1734 | { |
| 1735 | |
| 1736 | TRACE_((THIS_FILE, "write_port %.*s: count=%d", |
| 1737 | (int)cport->name.slen, cport->name.ptr, |
| 1738 | cport->samples_per_frame)); |
| 1739 | |
| 1740 | if (cport->port) { |
| 1741 | pjmedia_frame frame; |
| 1742 | |
| 1743 | frame.type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 1744 | frame.buf = cport->tx_buf; |
| 1745 | frame.size = cport->samples_per_frame * BYTES_PER_SAMPLE; |
| 1746 | /* Adjust timestamp as port may have different clock rate |
| 1747 | * than the bridge. |
| 1748 | */ |
| 1749 | frame.timestamp.u64 = timestamp->u64 * cport->clock_rate / |
| 1750 | conf->clock_rate; |
| 1751 | |
| 1752 | /* Add timestamp for individual frame */ |
| 1753 | frame.timestamp.u64 += ts; |
| 1754 | ts += cport->samples_per_frame; |
| 1755 | |
| 1756 | TRACE_((THIS_FILE, "put_frame %.*s, count=%d", |
| 1757 | (int)cport->name.slen, cport->name.ptr, |
| 1758 | frame.size / BYTES_PER_SAMPLE)); |
| 1759 | |
| 1760 | status = pjmedia_port_put_frame(cport->port, &frame); |
| 1761 | |
| 1762 | } else |
| 1763 | status = PJ_SUCCESS; |
| 1764 | |
| 1765 | cport->tx_buf_count -= cport->samples_per_frame; |
| 1766 | if (cport->tx_buf_count) { |
| 1767 | pjmedia_move_samples(cport->tx_buf, |
| 1768 | cport->tx_buf + cport->samples_per_frame, |
| 1769 | cport->tx_buf_count); |
| 1770 | } |
| 1771 | |
| 1772 | TRACE_((THIS_FILE, " tx_buf count now is %d", |
| 1773 | cport->tx_buf_count)); |
| 1774 | } |
| 1775 | |
| 1776 | return status; |
| 1777 | } |
| 1778 | |
| 1779 | |
| 1780 | /* |
| 1781 | * Player callback. |
| 1782 | */ |
| 1783 | static pj_status_t get_frame(pjmedia_port *this_port, |
| 1784 | pjmedia_frame *frame) |
| 1785 | { |
| 1786 | pjmedia_conf *conf = (pjmedia_conf*) this_port->port_data.pdata; |
| 1787 | pjmedia_frame_type speaker_frame_type = PJMEDIA_FRAME_TYPE_NONE; |
| 1788 | unsigned ci, cj, i, j; |
| 1789 | pj_int16_t *p_in; |
| 1790 | |
| 1791 | TRACE_((THIS_FILE, "- clock -")); |
| 1792 | |
| 1793 | /* Check that correct size is specified. */ |
| 1794 | pj_assert(frame->size == conf->samples_per_frame * |
| 1795 | conf->bits_per_sample / 8); |
| 1796 | |
| 1797 | /* Must lock mutex */ |
| 1798 | pj_mutex_lock(conf->mutex); |
| 1799 | |
| 1800 | /* Reset port source count. We will only reset port's mix |
| 1801 | * buffer when we have someone transmitting to it. |
| 1802 | */ |
| 1803 | for (i=0, ci=0; i<conf->max_ports && ci < conf->port_cnt; ++i) { |
| 1804 | struct conf_port *conf_port = conf->ports[i]; |
| 1805 | |
| 1806 | /* Skip empty port. */ |
| 1807 | if (!conf_port) |
| 1808 | continue; |
| 1809 | |
| 1810 | /* Var "ci" is to count how many ports have been visited so far. */ |
| 1811 | ++ci; |
| 1812 | |
| 1813 | /* Reset buffer (only necessary if the port has transmitter) and |
| 1814 | * reset auto adjustment level for mixed signal. |
| 1815 | */ |
| 1816 | conf_port->mix_adj = NORMAL_LEVEL; |
| 1817 | if (conf_port->transmitter_cnt) { |
| 1818 | pj_bzero(conf_port->mix_buf, |
| 1819 | conf->samples_per_frame*sizeof(conf_port->mix_buf[0])); |
| 1820 | } |
| 1821 | } |
| 1822 | |
| 1823 | /* Get frames from all ports, and "mix" the signal |
| 1824 | * to mix_buf of all listeners of the port. |
| 1825 | */ |
| 1826 | for (i=0, ci=0; i < conf->max_ports && ci < conf->port_cnt; ++i) { |
| 1827 | struct conf_port *conf_port = conf->ports[i]; |
| 1828 | pj_int32_t level = 0; |
| 1829 | |
| 1830 | /* Skip empty port. */ |
| 1831 | if (!conf_port) |
| 1832 | continue; |
| 1833 | |
| 1834 | /* Var "ci" is to count how many ports have been visited so far. */ |
| 1835 | ++ci; |
| 1836 | |
| 1837 | /* Skip if we're not allowed to receive from this port. */ |
| 1838 | if (conf_port->rx_setting == PJMEDIA_PORT_DISABLE) { |
| 1839 | conf_port->rx_level = 0; |
| 1840 | continue; |
| 1841 | } |
| 1842 | |
| 1843 | /* Also skip if this port doesn't have listeners. */ |
| 1844 | if (conf_port->listener_cnt == 0) { |
| 1845 | conf_port->rx_level = 0; |
| 1846 | continue; |
| 1847 | } |
| 1848 | |
| 1849 | /* Get frame from this port. |
| 1850 | * For passive ports, get the frame from the delay_buf. |
| 1851 | * For other ports, get the frame from the port. |
| 1852 | */ |
| 1853 | if (conf_port->delay_buf != NULL) { |
| 1854 | pj_status_t status; |
| 1855 | |
| 1856 | status = pjmedia_delay_buf_get(conf_port->delay_buf, |
| 1857 | (pj_int16_t*)frame->buf); |
| 1858 | if (status != PJ_SUCCESS) |
| 1859 | continue; |
| 1860 | |
| 1861 | } else { |
| 1862 | |
| 1863 | pj_status_t status; |
| 1864 | pjmedia_frame_type frame_type; |
| 1865 | |
| 1866 | status = read_port(conf, conf_port, (pj_int16_t*)frame->buf, |
| 1867 | conf->samples_per_frame, &frame_type); |
| 1868 | |
| 1869 | if (status != PJ_SUCCESS) { |
| 1870 | /* bennylp: why do we need this???? |
| 1871 | * Also see comments on similar issue with write_port(). |
| 1872 | PJ_LOG(4,(THIS_FILE, "Port %.*s get_frame() returned %d. " |
| 1873 | "Port is now disabled", |
| 1874 | (int)conf_port->name.slen, |
| 1875 | conf_port->name.ptr, |
| 1876 | status)); |
| 1877 | conf_port->rx_setting = PJMEDIA_PORT_DISABLE; |
| 1878 | */ |
| 1879 | continue; |
| 1880 | } |
| 1881 | |
| 1882 | /* Check that the port is not removed when we call get_frame() */ |
| 1883 | if (conf->ports[i] == NULL) |
| 1884 | continue; |
| 1885 | |
| 1886 | /* Ignore if we didn't get any frame */ |
| 1887 | if (frame_type != PJMEDIA_FRAME_TYPE_AUDIO) |
| 1888 | continue; |
| 1889 | } |
| 1890 | |
| 1891 | p_in = (pj_int16_t*) frame->buf; |
| 1892 | |
| 1893 | /* Adjust the RX level from this port |
| 1894 | * and calculate the average level at the same time. |
| 1895 | */ |
| 1896 | if (conf_port->rx_adj_level != NORMAL_LEVEL) { |
| 1897 | for (j=0; j<conf->samples_per_frame; ++j) { |
| 1898 | /* For the level adjustment, we need to store the sample to |
| 1899 | * a temporary 32bit integer value to avoid overflowing the |
| 1900 | * 16bit sample storage. |
| 1901 | */ |
| 1902 | pj_int32_t itemp; |
| 1903 | |
| 1904 | itemp = p_in[j]; |
| 1905 | /*itemp = itemp * adj / NORMAL_LEVEL;*/ |
| 1906 | /* bad code (signed/unsigned badness): |
| 1907 | * itemp = (itemp * conf_port->rx_adj_level) >> 7; |
| 1908 | */ |
| 1909 | itemp *= conf_port->rx_adj_level; |
| 1910 | itemp >>= 7; |
| 1911 | |
| 1912 | /* Clip the signal if it's too loud */ |
| 1913 | if (itemp > MAX_LEVEL) itemp = MAX_LEVEL; |
| 1914 | else if (itemp < MIN_LEVEL) itemp = MIN_LEVEL; |
| 1915 | |
| 1916 | p_in[j] = (pj_int16_t) itemp; |
| 1917 | level += (p_in[j]>=0? p_in[j] : -p_in[j]); |
| 1918 | } |
| 1919 | } else { |
| 1920 | for (j=0; j<conf->samples_per_frame; ++j) { |
| 1921 | level += (p_in[j]>=0? p_in[j] : -p_in[j]); |
| 1922 | } |
| 1923 | } |
| 1924 | |
| 1925 | level /= conf->samples_per_frame; |
| 1926 | |
| 1927 | /* Convert level to 8bit complement ulaw */ |
| 1928 | level = pjmedia_linear2ulaw(level) ^ 0xff; |
| 1929 | |
| 1930 | /* Put this level to port's last RX level. */ |
| 1931 | conf_port->rx_level = level; |
| 1932 | |
| 1933 | // Ticket #671: Skipping very low audio signal may cause noise |
| 1934 | // to be generated in the remote end by some hardphones. |
| 1935 | /* Skip processing frame if level is zero */ |
| 1936 | //if (level == 0) |
| 1937 | // continue; |
| 1938 | |
| 1939 | /* Add the signal to all listeners. */ |
| 1940 | for (cj=0; cj < conf_port->listener_cnt; ++cj) |
| 1941 | { |
| 1942 | struct conf_port *listener; |
| 1943 | pj_int32_t *mix_buf; |
| 1944 | unsigned k; |
| 1945 | |
| 1946 | listener = conf->ports[conf_port->listener_slots[cj]]; |
| 1947 | |
| 1948 | /* Skip if this listener doesn't want to receive audio */ |
| 1949 | if (listener->tx_setting != PJMEDIA_PORT_ENABLE) |
| 1950 | continue; |
| 1951 | |
| 1952 | mix_buf = listener->mix_buf; |
| 1953 | |
| 1954 | if (listener->transmitter_cnt > 1) { |
| 1955 | /* Mixing signals, |
| 1956 | * and calculate appropriate level adjustment if there is |
| 1957 | * any overflowed level in the mixed signal. |
| 1958 | */ |
| 1959 | for (k=0; k < conf->samples_per_frame; ++k) { |
| 1960 | mix_buf[k] += p_in[k]; |
| 1961 | /* Check if normalization adjustment needed. */ |
| 1962 | if (IS_OVERFLOW(mix_buf[k])) { |
| 1963 | /* NORMAL_LEVEL * MAX_LEVEL / mix_buf[k]; */ |
| 1964 | int tmp_adj = (MAX_LEVEL<<7) / mix_buf[k]; |
| 1965 | if (tmp_adj<0) tmp_adj = -tmp_adj; |
| 1966 | |
| 1967 | if (tmp_adj<listener->mix_adj) |
| 1968 | listener->mix_adj = tmp_adj; |
| 1969 | |
| 1970 | } /* if any overflow in the mixed signals */ |
| 1971 | } /* loop mixing signals */ |
| 1972 | } else { |
| 1973 | /* Only 1 transmitter: |
| 1974 | * just copy the samples to the mix buffer |
| 1975 | * no mixing and level adjustment needed |
| 1976 | */ |
| 1977 | for (k=0; k<conf->samples_per_frame; ++k) { |
| 1978 | mix_buf[k] = p_in[k]; |
| 1979 | } |
| 1980 | } |
| 1981 | } /* loop the listeners of conf port */ |
| 1982 | } /* loop of all conf ports */ |
| 1983 | |
| 1984 | /* Time for all ports to transmit whetever they have in their |
| 1985 | * buffer. |
| 1986 | */ |
| 1987 | for (i=0, ci=0; i<conf->max_ports && ci<conf->port_cnt; ++i) { |
| 1988 | struct conf_port *conf_port = conf->ports[i]; |
| 1989 | pjmedia_frame_type frm_type; |
| 1990 | pj_status_t status; |
| 1991 | |
| 1992 | if (!conf_port) |
| 1993 | continue; |
| 1994 | |
| 1995 | /* Var "ci" is to count how many ports have been visited. */ |
| 1996 | ++ci; |
| 1997 | |
| 1998 | status = write_port( conf, conf_port, &frame->timestamp, |
| 1999 | &frm_type); |
| 2000 | if (status != PJ_SUCCESS) { |
| 2001 | /* bennylp: why do we need this???? |
| 2002 | One thing for sure, put_frame()/write_port() may return |
| 2003 | non-successfull status on Win32 if there's temporary glitch |
| 2004 | on network interface, so disabling the port here does not |
| 2005 | sound like a good idea. |
| 2006 | |
| 2007 | PJ_LOG(4,(THIS_FILE, "Port %.*s put_frame() returned %d. " |
| 2008 | "Port is now disabled", |
| 2009 | (int)conf_port->name.slen, |
| 2010 | conf_port->name.ptr, |
| 2011 | status)); |
| 2012 | conf_port->tx_setting = PJMEDIA_PORT_DISABLE; |
| 2013 | */ |
| 2014 | continue; |
| 2015 | } |
| 2016 | |
| 2017 | /* Set the type of frame to be returned to sound playback |
| 2018 | * device. |
| 2019 | */ |
| 2020 | if (i == 0) |
| 2021 | speaker_frame_type = frm_type; |
| 2022 | } |
| 2023 | |
| 2024 | /* Return sound playback frame. */ |
| 2025 | if (conf->ports[0]->tx_level) { |
| 2026 | TRACE_((THIS_FILE, "write to audio, count=%d", |
| 2027 | conf->samples_per_frame)); |
| 2028 | pjmedia_copy_samples( (pj_int16_t*)frame->buf, |
| 2029 | (const pj_int16_t*)conf->ports[0]->mix_buf, |
| 2030 | conf->samples_per_frame); |
| 2031 | } else { |
| 2032 | /* Force frame type NONE */ |
| 2033 | speaker_frame_type = PJMEDIA_FRAME_TYPE_NONE; |
| 2034 | } |
| 2035 | |
| 2036 | /* MUST set frame type */ |
| 2037 | frame->type = speaker_frame_type; |
| 2038 | |
| 2039 | pj_mutex_unlock(conf->mutex); |
| 2040 | |
| 2041 | #ifdef REC_FILE |
| 2042 | if (fhnd_rec == NULL) |
| 2043 | fhnd_rec = fopen(REC_FILE, "wb"); |
| 2044 | if (fhnd_rec) |
| 2045 | fwrite(frame->buf, frame->size, 1, fhnd_rec); |
| 2046 | #endif |
| 2047 | |
| 2048 | return PJ_SUCCESS; |
| 2049 | } |
| 2050 | |
| 2051 | |
| 2052 | /* |
| 2053 | * get_frame() for passive port |
| 2054 | */ |
| 2055 | static pj_status_t get_frame_pasv(pjmedia_port *this_port, |
| 2056 | pjmedia_frame *frame) |
| 2057 | { |
| 2058 | pj_assert(0); |
| 2059 | PJ_UNUSED_ARG(this_port); |
| 2060 | PJ_UNUSED_ARG(frame); |
| 2061 | return -1; |
| 2062 | } |
| 2063 | |
| 2064 | |
| 2065 | /* |
| 2066 | * Recorder (or passive port) callback. |
| 2067 | */ |
| 2068 | static pj_status_t put_frame(pjmedia_port *this_port, |
| 2069 | pjmedia_frame *frame) |
| 2070 | { |
| 2071 | pjmedia_conf *conf = (pjmedia_conf*) this_port->port_data.pdata; |
| 2072 | struct conf_port *port = conf->ports[this_port->port_data.ldata]; |
| 2073 | pj_status_t status; |
| 2074 | |
| 2075 | /* Check for correct size. */ |
| 2076 | PJ_ASSERT_RETURN( frame->size == conf->samples_per_frame * |
| 2077 | conf->bits_per_sample / 8, |
| 2078 | PJMEDIA_ENCSAMPLESPFRAME); |
| 2079 | |
| 2080 | /* Check existance of delay_buf instance */ |
| 2081 | PJ_ASSERT_RETURN( port->delay_buf, PJ_EBUG ); |
| 2082 | |
| 2083 | /* Skip if this port is muted/disabled. */ |
| 2084 | if (port->rx_setting != PJMEDIA_PORT_ENABLE) { |
| 2085 | return PJ_SUCCESS; |
| 2086 | } |
| 2087 | |
| 2088 | /* Skip if no port is listening to the microphone */ |
| 2089 | if (port->listener_cnt == 0) { |
| 2090 | return PJ_SUCCESS; |
| 2091 | } |
| 2092 | |
| 2093 | status = pjmedia_delay_buf_put(port->delay_buf, (pj_int16_t*)frame->buf); |
| 2094 | |
| 2095 | return status; |
| 2096 | } |
| 2097 | |
| 2098 | #endif |