channels/chan_alsa.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * By Matthew Fredrickson <creslin@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  * \brief ALSA sound card channel driver
  21  *
  22  * \author Matthew Fredrickson <creslin@digium.com>
  23  *
  24  * \par See also
  25  * \arg Config_alsa
  26  *
  27  * \ingroup channel_drivers
  28  */
  29
  30 /*** MODULEINFO
  31         <depend>asound</depend>
  32  ***/
  33
  34 #include "asterisk.h"
  35
  36 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  37
  38 #include <unistd.h>
  39 #include <fcntl.h>
  40 #include <errno.h>
  41 #include <sys/ioctl.h>
  42 #include <sys/time.h>
  43 #include <string.h>
  44 #include <stdlib.h>
  45 #include <stdio.h>
  46
  47 #define ALSA_PCM_NEW_HW_PARAMS_API
  48 #define ALSA_PCM_NEW_SW_PARAMS_API
  49 #include <alsa/asoundlib.h>
  50
  51 #include "asterisk/frame.h"
  52 #include "asterisk/logger.h"
  53 #include "asterisk/channel.h"
  54 #include "asterisk/module.h"
  55 #include "asterisk/options.h"
  56 #include "asterisk/pbx.h"
  57 #include "asterisk/config.h"
  58 #include "asterisk/cli.h"
  59 #include "asterisk/utils.h"
  60 #include "asterisk/causes.h"
  61 #include "asterisk/endian.h"
  62 #include "asterisk/stringfields.h"
  63 #include "asterisk/abstract_jb.h"
  64 #include "asterisk/musiconhold.h"
  65
  66 #include "busy.h"
  67 #include "ringtone.h"
  68 #include "ring10.h"
  69 #include "answer.h"
  70
  71 #ifdef ALSA_MONITOR
  72 #include "alsa-monitor.h"
  73 #endif
  74
  75 /*! Global jitterbuffer configuration - by default, jb is disabled */
  76 static struct ast_jb_conf default_jbconf = {
  77         .flags = 0,
  78         .max_size = -1,
  79         .resync_threshold = -1,
  80         .impl = ""
  81 };
  82 static struct ast_jb_conf global_jbconf;
  83
  84 #define DEBUG 0
  85 /* Which device to use */
  86 #define ALSA_INDEV "default"
  87 #define ALSA_OUTDEV "default"
  88 #define DESIRED_RATE 8000
  89
  90 /* Lets use 160 sample frames, just like GSM.  */
  91 #define FRAME_SIZE 160
  92 #define PERIOD_FRAMES 80                /* 80 Frames, at 2 bytes each */
  93
  94 /* When you set the frame size, you have to come up with
  95    the right buffer format as well. */
  96 /* 5 64-byte frames = one frame */
  97 #define BUFFER_FMT ((buffersize * 10) << 16) | (0x0006);
  98
  99 /* Don't switch between read/write modes faster than every 300 ms */
 100 #define MIN_SWITCH_TIME 600
 101
 102 #if __BYTE_ORDER == __LITTLE_ENDIAN
 103 static snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
 104 #else
 105 static snd_pcm_format_t format = SND_PCM_FORMAT_S16_BE;
 106 #endif
 107
 108 static char indevname[50] = ALSA_INDEV;
 109 static char outdevname[50] = ALSA_OUTDEV;
 110
 111 #if 0
 112 static struct timeval lasttime;
 113 #endif
 114
 115 static int silencesuppression = 0;
 116 static int silencethreshold = 1000;
 117
 118 AST_MUTEX_DEFINE_STATIC(alsalock);
 119
 120 static const char tdesc[] = "ALSA Console Channel Driver";
 121 static const char config[] = "alsa.conf";
 122
 123 static char context[AST_MAX_CONTEXT] = "default";
 124 static char language[MAX_LANGUAGE] = "";
 125 static char exten[AST_MAX_EXTENSION] = "s";
 126 static char mohinterpret[MAX_MUSICCLASS];
 127
 128 static int hookstate = 0;
 129
 130 static short silence[FRAME_SIZE] = { 0, };
 131
 132 struct sound {
 133         int ind;
 134         short *data;
 135         int datalen;
 136         int samplen;
 137         int silencelen;
 138         int repeat;
 139 };
 140
 141 static struct sound sounds[] = {
 142         {AST_CONTROL_RINGING, ringtone, sizeof(ringtone) / 2, 16000, 32000, 1},
 143         {AST_CONTROL_BUSY, busy, sizeof(busy) / 2, 4000, 4000, 1},
 144         {AST_CONTROL_CONGESTION, busy, sizeof(busy) / 2, 2000, 2000, 1},
 145         {AST_CONTROL_RING, ring10, sizeof(ring10) / 2, 16000, 32000, 1},
 146         {AST_CONTROL_ANSWER, answer, sizeof(answer) / 2, 2200, 0, 0},
 147 };
 148
 149 /* Sound command pipe */
 150 static int sndcmd[2];
 151
 152 static struct chan_alsa_pvt {
 153         /* We only have one ALSA structure -- near sighted perhaps, but it
 154            keeps this driver as simple as possible -- as it should be. */
 155         struct ast_channel *owner;
 156         char exten[AST_MAX_EXTENSION];
 157         char context[AST_MAX_CONTEXT];
 158 #if 0
 159         snd_pcm_t *card;
 160 #endif
 161         snd_pcm_t *icard, *ocard;
 162
 163 } alsa;
 164
 165 /* Number of buffers...  Each is FRAMESIZE/8 ms long.  For example
 166    with 160 sample frames, and a buffer size of 3, we have a 60ms buffer,
 167    usually plenty. */
 168
 169 pthread_t sthread;
 170
 171 #define MAX_BUFFER_SIZE 100
 172
 173 /* File descriptors for sound device */
 174 static int readdev = -1;
 175 static int writedev = -1;
 176
 177 static int autoanswer = 1;
 178
 179 static int cursound = -1;
 180 static int sampsent = 0;
 181 static int silencelen = 0;
 182 static int offset = 0;
 183 static int nosound = 0;
 184
 185 /* ZZ */
 186 static struct ast_channel *alsa_request(const char *type, int format, void *data, int *cause);
 187 static int alsa_digit(struct ast_channel *c, char digit, unsigned int duration);
 188 static int alsa_text(struct ast_channel *c, const char *text);
 189 static int alsa_hangup(struct ast_channel *c);
 190 static int alsa_answer(struct ast_channel *c);
 191 static struct ast_frame *alsa_read(struct ast_channel *chan);
 192 static int alsa_call(struct ast_channel *c, char *dest, int timeout);
 193 static int alsa_write(struct ast_channel *chan, struct ast_frame *f);
 194 static int alsa_indicate(struct ast_channel *chan, int cond, const void *data, size_t datalen);
 195 static int alsa_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 196
 197 static const struct ast_channel_tech alsa_tech = {
 198         .type = "Console",
 199         .description = tdesc,
 200         .capabilities = AST_FORMAT_SLINEAR,
 201         .requester = alsa_request,
 202         .send_digit_end = alsa_digit,
 203         .send_text = alsa_text,
 204         .hangup = alsa_hangup,
 205         .answer = alsa_answer,
 206         .read = alsa_read,
 207         .call = alsa_call,
 208         .write = alsa_write,
 209         .indicate = alsa_indicate,
 210         .fixup = alsa_fixup,
 211 };
 212
 213 static int send_sound(void)
 214 {
 215         short myframe[FRAME_SIZE];
 216         int total = FRAME_SIZE;
 217         short *frame = NULL;
 218         int amt = 0, res, myoff;
 219         snd_pcm_state_t state;
 220
 221         if (cursound == -1)
 222                 return 0;
 223
 224         res = total;
 225         if (sampsent < sounds[cursound].samplen) {
 226                 myoff = 0;
 227                 while (total) {
 228                         amt = total;
 229                         if (amt > (sounds[cursound].datalen - offset))
 230                                 amt = sounds[cursound].datalen - offset;
 231                         memcpy(myframe + myoff, sounds[cursound].data + offset, amt * 2);
 232                         total -= amt;
 233                         offset += amt;
 234                         sampsent += amt;
 235                         myoff += amt;
 236                         if (offset >= sounds[cursound].datalen)
 237                                 offset = 0;
 238                 }
 239                 /* Set it up for silence */
 240                 if (sampsent >= sounds[cursound].samplen)
 241                         silencelen = sounds[cursound].silencelen;
 242                 frame = myframe;
 243         } else {
 244                 if (silencelen > 0) {
 245                         frame = silence;
 246                         silencelen -= res;
 247                 } else {
 248                         if (sounds[cursound].repeat) {
 249                                 /* Start over */
 250                                 sampsent = 0;
 251                                 offset = 0;
 252                         } else {
 253                                 cursound = -1;
 254                                 nosound = 0;
 255                         }
 256                         return 0;
 257                 }
 258         }
 259
 260         if (res == 0 || !frame)
 261                 return 0;
 262
 263 #ifdef ALSA_MONITOR
 264         alsa_monitor_write((char *) frame, res * 2);
 265 #endif
 266         state = snd_pcm_state(alsa.ocard);
 267         if (state == SND_PCM_STATE_XRUN)
 268                 snd_pcm_prepare(alsa.ocard);
 269         res = snd_pcm_writei(alsa.ocard, frame, res);
 270         if (res > 0)
 271                 return 0;
 272         return 0;
 273 }
 274
 275 static void *sound_thread(void *unused)
 276 {
 277         fd_set rfds;
 278         fd_set wfds;
 279         int max, res;
 280
 281         for (;;) {
 282                 FD_ZERO(&rfds);
 283                 FD_ZERO(&wfds);
 284                 max = sndcmd[0];
 285                 FD_SET(sndcmd[0], &rfds);
 286                 if (cursound > -1) {
 287                         FD_SET(writedev, &wfds);
 288                         if (writedev > max)
 289                                 max = writedev;
 290                 }
 291 #ifdef ALSA_MONITOR
 292                 if (!alsa.owner) {
 293                         FD_SET(readdev, &rfds);
 294                         if (readdev > max)
 295                                 max = readdev;
 296                 }
 297 #endif
 298                 res = ast_select(max + 1, &rfds, &wfds, NULL, NULL);
 299                 if (res < 1) {
 300                         ast_log(LOG_WARNING, "select failed: %s\n", strerror(errno));
 301                         continue;
 302                 }
 303 #ifdef ALSA_MONITOR
 304                 if (FD_ISSET(readdev, &rfds)) {
 305                         /* Keep the pipe going with read audio */
 306                         snd_pcm_state_t state;
 307                         short buf[FRAME_SIZE];
 308                         int r;
 309
 310                         state = snd_pcm_state(alsa.ocard);
 311                         if (state == SND_PCM_STATE_XRUN) {
 312                                 snd_pcm_prepare(alsa.ocard);
 313                         }
 314                         r = snd_pcm_readi(alsa.icard, buf, FRAME_SIZE);
 315                         if (r == -EPIPE) {
 316 #if DEBUG
 317                                 ast_log(LOG_ERROR, "XRUN read\n");
 318 #endif
 319                                 snd_pcm_prepare(alsa.icard);
 320                         } else if (r == -ESTRPIPE) {
 321                                 ast_log(LOG_ERROR, "-ESTRPIPE\n");
 322                                 snd_pcm_prepare(alsa.icard);
 323                         } else if (r < 0) {
 324                                 ast_log(LOG_ERROR, "Read error: %s\n", snd_strerror(r));
 325                         } else
 326                                 alsa_monitor_read((char *) buf, r * 2);
 327                 }
 328 #endif
 329                 if (FD_ISSET(sndcmd[0], &rfds)) {
 330                         read(sndcmd[0], &cursound, sizeof(cursound));
 331                         silencelen = 0;
 332                         offset = 0;
 333                         sampsent = 0;
 334                 }
 335                 if (FD_ISSET(writedev, &wfds))
 336                         if (send_sound())
 337                                 ast_log(LOG_WARNING, "Failed to write sound\n");
 338         }
 339         /* Never reached */
 340         return NULL;
 341 }
 342
 343 static snd_pcm_t *alsa_card_init(char *dev, snd_pcm_stream_t stream)
 344 {
 345         int err;
 346         int direction;
 347         snd_pcm_t *handle = NULL;
 348         snd_pcm_hw_params_t *hwparams = NULL;
 349         snd_pcm_sw_params_t *swparams = NULL;
 350         struct pollfd pfd;
 351         snd_pcm_uframes_t period_size = PERIOD_FRAMES * 4;
 352         /* int period_bytes = 0; */
 353         snd_pcm_uframes_t buffer_size = 0;
 354
 355         unsigned int rate = DESIRED_RATE;
 356 #if 0
 357         unsigned int per_min = 1;
 358 #endif
 359         /* unsigned int per_max = 8; */
 360         snd_pcm_uframes_t start_threshold, stop_threshold;
 361
 362         err = snd_pcm_open(&handle, dev, stream, SND_PCM_NONBLOCK);
 363         if (err < 0) {
 364                 ast_log(LOG_ERROR, "snd_pcm_open failed: %s\n", snd_strerror(err));
 365                 return NULL;
 366         } else
 367                 ast_log(LOG_DEBUG, "Opening device %s in %s mode\n", dev, (stream == SND_PCM_STREAM_CAPTURE) ? "read" : "write");
 368
 369         hwparams = alloca(snd_pcm_hw_params_sizeof());
 370         memset(hwparams, 0, snd_pcm_hw_params_sizeof());
 371         snd_pcm_hw_params_any(handle, hwparams);
 372
 373         err = snd_pcm_hw_params_set_access(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED);
 374         if (err < 0)
 375                 ast_log(LOG_ERROR, "set_access failed: %s\n", snd_strerror(err));
 376
 377         err = snd_pcm_hw_params_set_format(handle, hwparams, format);
 378         if (err < 0)
 379                 ast_log(LOG_ERROR, "set_format failed: %s\n", snd_strerror(err));
 380
 381         err = snd_pcm_hw_params_set_channels(handle, hwparams, 1);
 382         if (err < 0)
 383                 ast_log(LOG_ERROR, "set_channels failed: %s\n", snd_strerror(err));
 384
 385         direction = 0;
 386         err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &rate, &direction);
 387         if (rate != DESIRED_RATE)
 388                 ast_log(LOG_WARNING, "Rate not correct, requested %d, got %d\n", DESIRED_RATE, rate);
 389
 390         direction = 0;
 391         err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, &period_size, &direction);
 392         if (err < 0)
 393                 ast_log(LOG_ERROR, "period_size(%ld frames) is bad: %s\n", period_size, snd_strerror(err));
 394         else
 395                 ast_log(LOG_DEBUG, "Period size is %d\n", err);
 396
 397         buffer_size = 4096 * 2;         /* period_size * 16; */
 398         err = snd_pcm_hw_params_set_buffer_size_near(handle, hwparams, &buffer_size);
 399         if (err < 0)
 400                 ast_log(LOG_WARNING, "Problem setting buffer size of %ld: %s\n", buffer_size, snd_strerror(err));
 401         else
 402                 ast_log(LOG_DEBUG, "Buffer size is set to %d frames\n", err);
 403
 404 #if 0
 405         direction = 0;
 406         err = snd_pcm_hw_params_set_periods_min(handle, hwparams, &per_min, &direction);
 407         if (err < 0)
 408                 ast_log(LOG_ERROR, "periods_min: %s\n", snd_strerror(err));
 409
 410         err = snd_pcm_hw_params_set_periods_max(handle, hwparams, &per_max, 0);
 411         if (err < 0)
 412                 ast_log(LOG_ERROR, "periods_max: %s\n", snd_strerror(err));
 413 #endif
 414
 415         err = snd_pcm_hw_params(handle, hwparams);
 416         if (err < 0)
 417                 ast_log(LOG_ERROR, "Couldn't set the new hw params: %s\n", snd_strerror(err));
 418
 419         swparams = alloca(snd_pcm_sw_params_sizeof());
 420         memset(swparams, 0, snd_pcm_sw_params_sizeof());
 421         snd_pcm_sw_params_current(handle, swparams);
 422
 423 #if 1
 424         if (stream == SND_PCM_STREAM_PLAYBACK)
 425                 start_threshold = period_size;
 426         else
 427                 start_threshold = 1;
 428
 429         err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
 430         if (err < 0)
 431                 ast_log(LOG_ERROR, "start threshold: %s\n", snd_strerror(err));
 432 #endif
 433
 434 #if 1
 435         if (stream == SND_PCM_STREAM_PLAYBACK)
 436                 stop_threshold = buffer_size;
 437         else
 438                 stop_threshold = buffer_size;
 439
 440         err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
 441         if (err < 0)
 442                 ast_log(LOG_ERROR, "stop threshold: %s\n", snd_strerror(err));
 443 #endif
 444 #if 0
 445         err = snd_pcm_sw_params_set_xfer_align(handle, swparams, PERIOD_FRAMES);
 446         if (err < 0)
 447                 ast_log(LOG_ERROR, "Unable to set xfer alignment: %s\n", snd_strerror(err));
 448 #endif
 449
 450 #if 0
 451         err = snd_pcm_sw_params_set_silence_threshold(handle, swparams, silencethreshold);
 452         if (err < 0)
 453                 ast_log(LOG_ERROR, "Unable to set silence threshold: %s\n", snd_strerror(err));
 454 #endif
 455         err = snd_pcm_sw_params(handle, swparams);
 456         if (err < 0)
 457                 ast_log(LOG_ERROR, "sw_params: %s\n", snd_strerror(err));
 458
 459         err = snd_pcm_poll_descriptors_count(handle);
 460         if (err <= 0)
 461                 ast_log(LOG_ERROR, "Unable to get a poll descriptors count, error is %s\n", snd_strerror(err));
 462         if (err != 1)
 463                 ast_log(LOG_DEBUG, "Can't handle more than one device\n");
 464
 465         snd_pcm_poll_descriptors(handle, &pfd, err);
 466         ast_log(LOG_DEBUG, "Acquired fd %d from the poll descriptor\n", pfd.fd);
 467
 468         if (stream == SND_PCM_STREAM_CAPTURE)
 469                 readdev = pfd.fd;
 470         else
 471                 writedev = pfd.fd;
 472
 473         return handle;
 474 }
 475
 476 static int soundcard_init(void)
 477 {
 478         alsa.icard = alsa_card_init(indevname, SND_PCM_STREAM_CAPTURE);
 479         alsa.ocard = alsa_card_init(outdevname, SND_PCM_STREAM_PLAYBACK);
 480
 481         if (!alsa.icard || !alsa.ocard) {
 482                 ast_log(LOG_ERROR, "Problem opening alsa I/O devices\n");
 483                 return -1;
 484         }
 485
 486         return readdev;
 487 }
 488
 489 static int alsa_digit(struct ast_channel *c, char digit, unsigned int duration)
 490 {
 491         ast_mutex_lock(&alsalock);
 492         ast_verbose(" << Console Received digit %c of duration %u ms >> \n",
 493                 digit, duration);
 494         ast_mutex_unlock(&alsalock);
 495         return 0;
 496 }
 497
 498 static int alsa_text(struct ast_channel *c, const char *text)
 499 {
 500         ast_mutex_lock(&alsalock);
 501         ast_verbose(" << Console Received text %s >> \n", text);
 502         ast_mutex_unlock(&alsalock);
 503         return 0;
 504 }
 505
 506 static void grab_owner(void)
 507 {
 508         while (alsa.owner && ast_mutex_trylock(&alsa.owner->lock)) {
 509                 DEADLOCK_AVOIDANCE(&alsalock);
 510         }
 511 }
 512
 513 static int alsa_call(struct ast_channel *c, char *dest, int timeout)
 514 {
 515         int res = 3;
 516         struct ast_frame f = { AST_FRAME_CONTROL };
 517         ast_mutex_lock(&alsalock);
 518         ast_verbose(" << Call placed to '%s' on console >> \n", dest);
 519         if (autoanswer) {
 520                 ast_verbose(" << Auto-answered >> \n");
 521                 grab_owner();
 522                 if (alsa.owner) {
 523                         f.subclass = AST_CONTROL_ANSWER;
 524                         ast_queue_frame(alsa.owner, &f);
 525                         ast_mutex_unlock(&alsa.owner->lock);
 526                 }
 527         } else {
 528                 ast_verbose(" << Type 'answer' to answer, or use 'autoanswer' for future calls >> \n");
 529                 grab_owner();
 530                 if (alsa.owner) {
 531                         f.subclass = AST_CONTROL_RINGING;
 532                         ast_queue_frame(alsa.owner, &f);
 533                         ast_mutex_unlock(&alsa.owner->lock);
 534                 }
 535                 write(sndcmd[1], &res, sizeof(res));
 536         }
 537         snd_pcm_prepare(alsa.icard);
 538         snd_pcm_start(alsa.icard);
 539         ast_mutex_unlock(&alsalock);
 540         return 0;
 541 }
 542
 543 static void answer_sound(void)
 544 {
 545         int res;
 546         nosound = 1;
 547         res = 4;
 548         write(sndcmd[1], &res, sizeof(res));
 549
 550 }
 551
 552 static int alsa_answer(struct ast_channel *c)
 553 {
 554         ast_mutex_lock(&alsalock);
 555         ast_verbose(" << Console call has been answered >> \n");
 556         answer_sound();
 557         ast_setstate(c, AST_STATE_UP);
 558         cursound = -1;
 559         snd_pcm_prepare(alsa.icard);
 560         snd_pcm_start(alsa.icard);
 561         ast_mutex_unlock(&alsalock);
 562         return 0;
 563 }
 564
 565 static int alsa_hangup(struct ast_channel *c)
 566 {
 567         int res;
 568         ast_mutex_lock(&alsalock);
 569         cursound = -1;
 570         c->tech_pvt = NULL;
 571         alsa.owner = NULL;
 572         ast_verbose(" << Hangup on console >> \n");
 573         ast_module_unref(ast_module_info->self);
 574         if (hookstate) {
 575                 hookstate = 0;
 576                 if (!autoanswer) {
 577                         /* Congestion noise */
 578                         res = 2;
 579                         write(sndcmd[1], &res, sizeof(res));
 580                 }
 581         }
 582         snd_pcm_drop(alsa.icard);
 583         ast_mutex_unlock(&alsalock);
 584         return 0;
 585 }
 586
 587 static int alsa_write(struct ast_channel *chan, struct ast_frame *f)
 588 {
 589         static char sizbuf[8000];
 590         static int sizpos = 0;
 591         int len = sizpos;
 592         int pos;
 593         int res = 0;
 594         /* size_t frames = 0; */
 595         snd_pcm_state_t state;
 596
 597         /* Immediately return if no sound is enabled */
 598         if (nosound)
 599                 return 0;
 600
 601         ast_mutex_lock(&alsalock);
 602         /* Stop any currently playing sound */
 603         if (cursound != -1) {
 604                 snd_pcm_drop(alsa.ocard);
 605                 snd_pcm_prepare(alsa.ocard);
 606                 cursound = -1;
 607         }
 608
 609
 610         /* We have to digest the frame in 160-byte portions */
 611         if (f->datalen > sizeof(sizbuf) - sizpos) {
 612                 ast_log(LOG_WARNING, "Frame too large\n");
 613                 res = -1;
 614         } else {
 615                 memcpy(sizbuf + sizpos, f->data, f->datalen);
 616                 len += f->datalen;
 617                 pos = 0;
 618 #ifdef ALSA_MONITOR
 619                 alsa_monitor_write(sizbuf, len);
 620 #endif
 621                 state = snd_pcm_state(alsa.ocard);
 622                 if (state == SND_PCM_STATE_XRUN)
 623                         snd_pcm_prepare(alsa.ocard);
 624                 res = snd_pcm_writei(alsa.ocard, sizbuf, len / 2);
 625                 if (res == -EPIPE) {
 626 #if DEBUG
 627                         ast_log(LOG_DEBUG, "XRUN write\n");
 628 #endif
 629                         snd_pcm_prepare(alsa.ocard);
 630                         res = snd_pcm_writei(alsa.ocard, sizbuf, len / 2);
 631                         if (res != len / 2) {
 632                                 ast_log(LOG_ERROR, "Write error: %s\n", snd_strerror(res));
 633                                 res = -1;
 634                         } else if (res < 0) {
 635                                 ast_log(LOG_ERROR, "Write error %s\n", snd_strerror(res));
 636                                 res = -1;
 637                         }
 638                 } else {
 639                         if (res == -ESTRPIPE)
 640                                 ast_log(LOG_ERROR, "You've got some big problems\n");
 641                         else if (res < 0)
 642                                 ast_log(LOG_NOTICE, "Error %d on write\n", res);
 643                 }
 644         }
 645         ast_mutex_unlock(&alsalock);
 646         if (res > 0)
 647                 res = 0;
 648         return res;
 649 }
 650
 651
 652 static struct ast_frame *alsa_read(struct ast_channel *chan)
 653 {
 654         static struct ast_frame f;
 655         static short __buf[FRAME_SIZE + AST_FRIENDLY_OFFSET / 2];
 656         short *buf;
 657         static int readpos = 0;
 658         static int left = FRAME_SIZE;
 659         snd_pcm_state_t state;
 660         int r = 0;
 661         int off = 0;
 662
 663         ast_mutex_lock(&alsalock);
 664         /* Acknowledge any pending cmd */
 665         f.frametype = AST_FRAME_NULL;
 666         f.subclass = 0;
 667         f.samples = 0;
 668         f.datalen = 0;
 669         f.data = NULL;
 670         f.offset = 0;
 671         f.src = "Console";
 672         f.mallocd = 0;
 673         f.delivery.tv_sec = 0;
 674         f.delivery.tv_usec = 0;
 675
 676         state = snd_pcm_state(alsa.icard);
 677         if ((state != SND_PCM_STATE_PREPARED) && (state != SND_PCM_STATE_RUNNING)) {
 678                 snd_pcm_prepare(alsa.icard);
 679         }
 680
 681         buf = __buf + AST_FRIENDLY_OFFSET / 2;
 682
 683         r = snd_pcm_readi(alsa.icard, buf + readpos, left);
 684         if (r == -EPIPE) {
 685 #if DEBUG
 686                 ast_log(LOG_ERROR, "XRUN read\n");
 687 #endif
 688                 snd_pcm_prepare(alsa.icard);
 689         } else if (r == -ESTRPIPE) {
 690                 ast_log(LOG_ERROR, "-ESTRPIPE\n");
 691                 snd_pcm_prepare(alsa.icard);
 692         } else if (r < 0) {
 693                 ast_log(LOG_ERROR, "Read error: %s\n", snd_strerror(r));
 694         } else if (r >= 0) {
 695                 off -= r;
 696         }
 697         /* Update positions */
 698         readpos += r;
 699         left -= r;
 700
 701         if (readpos >= FRAME_SIZE) {
 702                 /* A real frame */
 703                 readpos = 0;
 704                 left = FRAME_SIZE;
 705                 if (chan->_state != AST_STATE_UP) {
 706                         /* Don't transmit unless it's up */
 707                         ast_mutex_unlock(&alsalock);
 708                         return &f;
 709                 }
 710                 f.frametype = AST_FRAME_VOICE;
 711                 f.subclass = AST_FORMAT_SLINEAR;
 712                 f.samples = FRAME_SIZE;
 713                 f.datalen = FRAME_SIZE * 2;
 714                 f.data = buf;
 715                 f.offset = AST_FRIENDLY_OFFSET;
 716                 f.src = "Console";
 717                 f.mallocd = 0;
 718 #ifdef ALSA_MONITOR
 719                 alsa_monitor_read((char *) buf, FRAME_SIZE * 2);
 720 #endif
 721
 722         }
 723         ast_mutex_unlock(&alsalock);
 724         return &f;
 725 }
 726
 727 static int alsa_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 728 {
 729         struct chan_alsa_pvt *p = newchan->tech_pvt;
 730         ast_mutex_lock(&alsalock);
 731         p->owner = newchan;
 732         ast_mutex_unlock(&alsalock);
 733         return 0;
 734 }
 735
 736 static int alsa_indicate(struct ast_channel *chan, int cond, const void *data, size_t datalen)
 737 {
 738         int res = 0;
 739
 740         ast_mutex_lock(&alsalock);
 741
 742         switch (cond) {
 743         case AST_CONTROL_BUSY:
 744                 res = 1;
 745                 break;
 746         case AST_CONTROL_CONGESTION:
 747                 res = 2;
 748                 break;
 749         case AST_CONTROL_RINGING:
 750         case AST_CONTROL_PROGRESS:
 751                 break;
 752         case -1:
 753                 res = -1;
 754                 break;
 755         case AST_CONTROL_VIDUPDATE:
 756                 res = -1;
 757                 break;
 758         case AST_CONTROL_HOLD:
 759                 ast_verbose(" << Console Has Been Placed on Hold >> \n");
 760                 ast_moh_start(chan, data, mohinterpret);
 761                 break;
 762         case AST_CONTROL_UNHOLD:
 763                 ast_verbose(" << Console Has Been Retrieved from Hold >> \n");
 764                 ast_moh_stop(chan);
 765                 break;
 766         case AST_CONTROL_SRCUPDATE:
 767                 break;
 768         default:
 769                 ast_log(LOG_WARNING, "Don't know how to display condition %d on %s\n", cond, chan->name);
 770                 res = -1;
 771         }
 772
 773         if (res > -1)
 774                 write(sndcmd[1], &res, sizeof(res));
 775
 776         ast_mutex_unlock(&alsalock);
 777
 778         return res;
 779 }
 780
 781 static struct ast_channel *alsa_new(struct chan_alsa_pvt *p, int state)
 782 {
 783         struct ast_channel *tmp = NULL;
 784
 785         if (!(tmp = ast_channel_alloc(1, state, 0, 0, "", p->exten, p->context, 0, "ALSA/%s", indevname)))
 786                 return NULL;
 787
 788         tmp->tech = &alsa_tech;
 789         tmp->fds[0] = readdev;
 790         tmp->nativeformats = AST_FORMAT_SLINEAR;
 791         tmp->readformat = AST_FORMAT_SLINEAR;
 792         tmp->writeformat = AST_FORMAT_SLINEAR;
 793         tmp->tech_pvt = p;
 794         if (!ast_strlen_zero(p->context))
 795                 ast_copy_string(tmp->context, p->context, sizeof(tmp->context));
 796         if (!ast_strlen_zero(p->exten))
 797                 ast_copy_string(tmp->exten, p->exten, sizeof(tmp->exten));
 798         if (!ast_strlen_zero(language))
 799                 ast_string_field_set(tmp, language, language);
 800         p->owner = tmp;
 801         ast_module_ref(ast_module_info->self);
 802         ast_jb_configure(tmp, &global_jbconf);
 803         if (state != AST_STATE_DOWN) {
 804                 if (ast_pbx_start(tmp)) {
 805                         ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
 806                         ast_hangup(tmp);
 807                         tmp = NULL;
 808                 }
 809         }
 810
 811         return tmp;
 812 }
 813
 814 static struct ast_channel *alsa_request(const char *type, int format, void *data, int *cause)
 815 {
 816         int oldformat = format;
 817         struct ast_channel *tmp = NULL;
 818
 819         format &= AST_FORMAT_SLINEAR;
 820         if (!format) {
 821                 ast_log(LOG_NOTICE, "Asked to get a channel of format '%d'\n", oldformat);
 822                 return NULL;
 823         }
 824
 825         ast_mutex_lock(&alsalock);
 826
 827         if (alsa.owner) {
 828                 ast_log(LOG_NOTICE, "Already have a call on the ALSA channel\n");
 829                 *cause = AST_CAUSE_BUSY;
 830         } else if (!(tmp = alsa_new(&alsa, AST_STATE_DOWN)))
 831                 ast_log(LOG_WARNING, "Unable to create new ALSA channel\n");
 832
 833         ast_mutex_unlock(&alsalock);
 834
 835         return tmp;
 836 }
 837
 838 static int console_autoanswer_deprecated(int fd, int argc, char *argv[])
 839 {
 840         int res = RESULT_SUCCESS;
 841
 842         if ((argc != 1) && (argc != 2))
 843                 return RESULT_SHOWUSAGE;
 844
 845         ast_mutex_lock(&alsalock);
 846
 847         if (argc == 1) {
 848                 ast_cli(fd, "Auto answer is %s.\n", autoanswer ? "on" : "off");
 849         } else {
 850                 if (!strcasecmp(argv[1], "on"))
 851                         autoanswer = -1;
 852                 else if (!strcasecmp(argv[1], "off"))
 853                         autoanswer = 0;
 854                 else
 855                         res = RESULT_SHOWUSAGE;
 856         }
 857
 858         ast_mutex_unlock(&alsalock);
 859
 860         return res;
 861 }
 862
 863 static int console_autoanswer(int fd, int argc, char *argv[])
 864 {
 865         int res = RESULT_SUCCESS;;
 866         if ((argc != 2) && (argc != 3))
 867                 return RESULT_SHOWUSAGE;
 868         ast_mutex_lock(&alsalock);
 869         if (argc == 2) {
 870                 ast_cli(fd, "Auto answer is %s.\n", autoanswer ? "on" : "off");
 871         } else {
 872                 if (!strcasecmp(argv[2], "on"))
 873                         autoanswer = -1;
 874                 else if (!strcasecmp(argv[2], "off"))
 875                         autoanswer = 0;
 876                 else
 877                         res = RESULT_SHOWUSAGE;
 878         }
 879         ast_mutex_unlock(&alsalock);
 880         return res;
 881 }
 882
 883 static char *autoanswer_complete(const char *line, const char *word, int pos, int state)
 884 {
 885 #ifndef MIN
 886 #define MIN(a,b) ((a) < (b) ? (a) : (b))
 887 #endif
 888         switch (state) {
 889                 case 0:
 890                         if (!ast_strlen_zero(word) && !strncasecmp(word, "on", MIN(strlen(word), 2)))
 891                                 return ast_strdup("on");
 892                 case 1:
 893                         if (!ast_strlen_zero(word) && !strncasecmp(word, "off", MIN(strlen(word), 3)))
 894                                 return ast_strdup("off");
 895                 default:
 896                         return NULL;
 897         }
 898         return NULL;
 899 }
 900
 901 static const char autoanswer_usage[] =
 902         "Usage: console autoanswer [on|off]\n"
 903         "       Enables or disables autoanswer feature.  If used without\n"
 904         "       argument, displays the current on/off status of autoanswer.\n"
 905         "       The default value of autoanswer is in 'alsa.conf'.\n";
 906
 907 static int console_answer_deprecated(int fd, int argc, char *argv[])
 908 {
 909         int res = RESULT_SUCCESS;
 910
 911         if (argc != 1)
 912                 return RESULT_SHOWUSAGE;
 913
 914         ast_mutex_lock(&alsalock);
 915
 916         if (!alsa.owner) {
 917                 ast_cli(fd, "No one is calling us\n");
 918                 res = RESULT_FAILURE;
 919         } else {
 920                 hookstate = 1;
 921                 cursound = -1;
 922                 grab_owner();
 923                 if (alsa.owner) {
 924                         struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_ANSWER };
 925                         ast_queue_frame(alsa.owner, &f);
 926                         ast_mutex_unlock(&alsa.owner->lock);
 927                 }
 928                 answer_sound();
 929         }
 930
 931         snd_pcm_prepare(alsa.icard);
 932         snd_pcm_start(alsa.icard);
 933
 934         ast_mutex_unlock(&alsalock);
 935
 936         return RESULT_SUCCESS;
 937 }
 938
 939 static int console_answer(int fd, int argc, char *argv[])
 940 {
 941         int res = RESULT_SUCCESS;
 942
 943         if (argc != 2)
 944                 return RESULT_SHOWUSAGE;
 945
 946         ast_mutex_lock(&alsalock);
 947
 948         if (!alsa.owner) {
 949                 ast_cli(fd, "No one is calling us\n");
 950                 res = RESULT_FAILURE;
 951         } else {
 952                 hookstate = 1;
 953                 cursound = -1;
 954                 grab_owner();
 955                 if (alsa.owner) {
 956                         struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_ANSWER };
 957                         ast_queue_frame(alsa.owner, &f);
 958                         ast_mutex_unlock(&alsa.owner->lock);
 959                 }
 960                 answer_sound();
 961         }
 962
 963         snd_pcm_prepare(alsa.icard);
 964         snd_pcm_start(alsa.icard);
 965
 966         ast_mutex_unlock(&alsalock);
 967
 968         return RESULT_SUCCESS;
 969 }
 970
 971 static char sendtext_usage[] =
 972         "Usage: console send text <message>\n"
 973         "       Sends a text message for display on the remote terminal.\n";
 974
 975 static int console_sendtext_deprecated(int fd, int argc, char *argv[])
 976 {
 977         int tmparg = 2;
 978         int res = RESULT_SUCCESS;
 979
 980         if (argc < 2)
 981                 return RESULT_SHOWUSAGE;
 982
 983         ast_mutex_lock(&alsalock);
 984
 985         if (!alsa.owner) {
 986                 ast_cli(fd, "No one is calling us\n");
 987                 res = RESULT_FAILURE;
 988         } else {
 989                 struct ast_frame f = { AST_FRAME_TEXT, 0 };
 990                 char text2send[256] = "";
 991                 text2send[0] = '\0';
 992                 while (tmparg < argc) {
 993                         strncat(text2send, argv[tmparg++], sizeof(text2send) - strlen(text2send) - 1);
 994                         strncat(text2send, " ", sizeof(text2send) - strlen(text2send) - 1);
 995                 }
 996                 text2send[strlen(text2send) - 1] = '\n';
 997                 f.data = text2send;
 998                 f.datalen = strlen(text2send) + 1;
 999                 grab_owner();
1000                 if (alsa.owner) {
1001                         ast_queue_frame(alsa.owner, &f);
1002                         f.frametype = AST_FRAME_CONTROL;
1003                         f.subclass = AST_CONTROL_ANSWER;
1004                         f.data = NULL;
1005                         f.datalen = 0;
1006                         ast_queue_frame(alsa.owner, &f);
1007                         ast_mutex_unlock(&alsa.owner->lock);
1008                 }
1009         }
1010
1011         ast_mutex_unlock(&alsalock);
1012
1013         return res;
1014 }
1015
1016 static int console_sendtext(int fd, int argc, char *argv[])
1017 {
1018         int tmparg = 3;
1019         int res = RESULT_SUCCESS;
1020
1021         if (argc < 3)
1022                 return RESULT_SHOWUSAGE;
1023
1024         ast_mutex_lock(&alsalock);
1025
1026         if (!alsa.owner) {
1027                 ast_cli(fd, "No one is calling us\n");
1028                 res = RESULT_FAILURE;
1029         } else {
1030                 struct ast_frame f = { AST_FRAME_TEXT, 0 };
1031                 char text2send[256] = "";
1032                 text2send[0] = '\0';
1033                 while (tmparg < argc) {
1034                         strncat(text2send, argv[tmparg++], sizeof(text2send) - strlen(text2send) - 1);
1035                         strncat(text2send, " ", sizeof(text2send) - strlen(text2send) - 1);
1036                 }
1037                 text2send[strlen(text2send) - 1] = '\n';
1038                 f.data = text2send;
1039                 f.datalen = strlen(text2send) + 1;
1040                 grab_owner();
1041                 if (alsa.owner) {
1042                         ast_queue_frame(alsa.owner, &f);
1043                         f.frametype = AST_FRAME_CONTROL;
1044                         f.subclass = AST_CONTROL_ANSWER;
1045                         f.data = NULL;
1046                         f.datalen = 0;
1047                         ast_queue_frame(alsa.owner, &f);
1048                         ast_mutex_unlock(&alsa.owner->lock);
1049                 }
1050         }
1051
1052         ast_mutex_unlock(&alsalock);
1053
1054         return res;
1055 }
1056
1057 static char answer_usage[] =
1058         "Usage: console answer\n"
1059         "       Answers an incoming call on the console (ALSA) channel.\n";
1060
1061 static int console_hangup_deprecated(int fd, int argc, char *argv[])
1062 {
1063         int res = RESULT_SUCCESS;
1064
1065         if (argc != 1)
1066                 return RESULT_SHOWUSAGE;
1067
1068         cursound = -1;
1069
1070         ast_mutex_lock(&alsalock);
1071
1072         if (!alsa.owner && !hookstate) {
1073                 ast_cli(fd, "No call to hangup up\n");
1074                 res = RESULT_FAILURE;
1075         } else {
1076                 hookstate = 0;
1077                 grab_owner();
1078                 if (alsa.owner) {
1079                         ast_queue_hangup(alsa.owner);
1080                         ast_mutex_unlock(&alsa.owner->lock);
1081                 }
1082         }
1083
1084         ast_mutex_unlock(&alsalock);
1085
1086         return res;
1087 }
1088
1089 static int console_hangup(int fd, int argc, char *argv[])
1090 {
1091         int res = RESULT_SUCCESS;
1092
1093         if (argc != 2)
1094                 return RESULT_SHOWUSAGE;
1095
1096         cursound = -1;
1097
1098         ast_mutex_lock(&alsalock);
1099
1100         if (!alsa.owner && !hookstate) {
1101                 ast_cli(fd, "No call to hangup up\n");
1102                 res = RESULT_FAILURE;
1103         } else {
1104                 hookstate = 0;
1105                 grab_owner();
1106                 if (alsa.owner) {
1107                         ast_queue_hangup(alsa.owner);
1108                         ast_mutex_unlock(&alsa.owner->lock);
1109                 }
1110         }
1111
1112         ast_mutex_unlock(&alsalock);
1113
1114         return res;
1115 }
1116
1117 static char hangup_usage[] =
1118         "Usage: console hangup\n"
1119         "       Hangs up any call currently placed on the console.\n";
1120
1121 static int console_dial_deprecated(int fd, int argc, char *argv[])
1122 {
1123         char tmp[256], *tmp2;
1124         char *mye, *myc;
1125         char *d;
1126         int res = RESULT_SUCCESS;
1127
1128         if ((argc != 1) && (argc != 2))
1129                 return RESULT_SHOWUSAGE;
1130
1131         ast_mutex_lock(&alsalock);
1132
1133         if (alsa.owner) {
1134                 if (argc == 2) {
1135                         d = argv[1];
1136                         grab_owner();
1137                         if (alsa.owner) {
1138                                 struct ast_frame f = { AST_FRAME_DTMF };
1139                                 while (*d) {
1140                                         f.subclass = *d;
1141                                         ast_queue_frame(alsa.owner, &f);
1142                                         d++;
1143                                 }
1144                                 ast_mutex_unlock(&alsa.owner->lock);
1145                         }
1146                 } else {
1147                         ast_cli(fd, "You're already in a call.  You can use this only to dial digits until you hangup\n");
1148                         res = RESULT_FAILURE;
1149                 }
1150         } else {
1151                 mye = exten;
1152                 myc = context;
1153                 if (argc == 2) {
1154                         char *stringp = NULL;
1155                         ast_copy_string(tmp, argv[1], sizeof(tmp));
1156                         stringp = tmp;
1157                         strsep(&stringp, "@");
1158                         tmp2 = strsep(&stringp, "@");
1159                         if (!ast_strlen_zero(tmp))
1160                                 mye = tmp;
1161                         if (!ast_strlen_zero(tmp2))
1162                                 myc = tmp2;
1163                 }
1164                 if (ast_exists_extension(NULL, myc, mye, 1, NULL)) {
1165                         ast_copy_string(alsa.exten, mye, sizeof(alsa.exten));
1166                         ast_copy_string(alsa.context, myc, sizeof(alsa.context));
1167                         hookstate = 1;
1168                         alsa_new(&alsa, AST_STATE_RINGING);
1169                 } else
1170                         ast_cli(fd, "No such extension '%s' in context '%s'\n", mye, myc);
1171         }
1172
1173         ast_mutex_unlock(&alsalock);
1174
1175         return res;
1176 }
1177
1178 static int console_dial(int fd, int argc, char *argv[])
1179 {
1180         char tmp[256], *tmp2;
1181         char *mye, *myc;
1182         char *d;
1183         int res = RESULT_SUCCESS;
1184
1185         if ((argc != 2) && (argc != 3))
1186                 return RESULT_SHOWUSAGE;
1187
1188         ast_mutex_lock(&alsalock);
1189
1190         if (alsa.owner) {
1191                 if (argc == 3) {
1192                         d = argv[2];
1193                         grab_owner();
1194                         if (alsa.owner) {
1195                                 struct ast_frame f = { AST_FRAME_DTMF };
1196                                 while (*d) {
1197                                         f.subclass = *d;
1198                                         ast_queue_frame(alsa.owner, &f);
1199                                         d++;
1200                                 }
1201                                 ast_mutex_unlock(&alsa.owner->lock);
1202                         }
1203                 } else {
1204                         ast_cli(fd, "You're already in a call.  You can use this only to dial digits until you hangup\n");
1205                         res = RESULT_FAILURE;
1206                 }
1207         } else {
1208                 mye = exten;
1209                 myc = context;
1210                 if (argc == 3) {
1211                         char *stringp = NULL;
1212                         ast_copy_string(tmp, argv[2], sizeof(tmp));
1213                         stringp = tmp;
1214                         strsep(&stringp, "@");
1215                         tmp2 = strsep(&stringp, "@");
1216                         if (!ast_strlen_zero(tmp))
1217                                 mye = tmp;
1218                         if (!ast_strlen_zero(tmp2))
1219                                 myc = tmp2;
1220                 }
1221                 if (ast_exists_extension(NULL, myc, mye, 1, NULL)) {
1222                         ast_copy_string(alsa.exten, mye, sizeof(alsa.exten));
1223                         ast_copy_string(alsa.context, myc, sizeof(alsa.context));
1224                         hookstate = 1;
1225                         alsa_new(&alsa, AST_STATE_RINGING);
1226                 } else
1227                         ast_cli(fd, "No such extension '%s' in context '%s'\n", mye, myc);
1228         }
1229
1230         ast_mutex_unlock(&alsalock);
1231
1232         return res;
1233 }
1234
1235 static char dial_usage[] =
1236         "Usage: console dial [extension[@context]]\n"
1237         "       Dials a given extension (and context if specified)\n";
1238
1239 static struct ast_cli_entry cli_alsa_answer_deprecated = {
1240         { "answer", NULL },
1241         console_answer_deprecated, NULL,
1242         NULL };
1243
1244 static struct ast_cli_entry cli_alsa_hangup_deprecated = {
1245         { "hangup", NULL },
1246         console_hangup_deprecated, NULL,
1247         NULL };
1248
1249 static struct ast_cli_entry cli_alsa_dial_deprecated = {
1250         { "dial", NULL },
1251         console_dial_deprecated, NULL,
1252         NULL };
1253
1254 static struct ast_cli_entry cli_alsa_send_text_deprecated = {
1255         { "send", "text", NULL },
1256         console_sendtext_deprecated, NULL,
1257         NULL };
1258
1259 static struct ast_cli_entry cli_alsa_autoanswer_deprecated = {
1260         { "autoanswer", NULL },
1261         console_autoanswer_deprecated, NULL,
1262         NULL, autoanswer_complete };
1263
1264 static struct ast_cli_entry cli_alsa[] = {
1265         { { "console", "answer", NULL },
1266         console_answer, "Answer an incoming console call",
1267         answer_usage, NULL, &cli_alsa_answer_deprecated },
1268
1269         { { "console", "hangup", NULL },
1270         console_hangup, "Hangup a call on the console",
1271         hangup_usage, NULL, &cli_alsa_hangup_deprecated },
1272
1273         { { "console", "dial", NULL },
1274         console_dial, "Dial an extension on the console",
1275         dial_usage, NULL, &cli_alsa_dial_deprecated },
1276
1277         { { "console", "send", "text", NULL },
1278         console_sendtext, "Send text to the remote device",
1279         sendtext_usage, NULL, &cli_alsa_send_text_deprecated },
1280
1281         { { "console", "autoanswer", NULL },
1282         console_autoanswer, "Sets/displays autoanswer",
1283         autoanswer_usage, autoanswer_complete, &cli_alsa_autoanswer_deprecated },
1284 };
1285
1286 static int load_module(void)
1287 {
1288         int res;
1289         struct ast_config *cfg;
1290         struct ast_variable *v;
1291
1292         /* Copy the default jb config over global_jbconf */
1293         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
1294
1295         strcpy(mohinterpret, "default");
1296
1297         if ((cfg = ast_config_load(config))) {
1298                 v = ast_variable_browse(cfg, "general");
1299                 for (; v; v = v->next) {
1300                         /* handle jb conf */
1301                         if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
1302                                 continue;
1303
1304                         if (!strcasecmp(v->name, "autoanswer"))
1305                                 autoanswer = ast_true(v->value);
1306                         else if (!strcasecmp(v->name, "silencesuppression"))
1307                                 silencesuppression = ast_true(v->value);
1308                         else if (!strcasecmp(v->name, "silencethreshold"))
1309                                 silencethreshold = atoi(v->value);
1310                         else if (!strcasecmp(v->name, "context"))
1311                                 ast_copy_string(context, v->value, sizeof(context));
1312                         else if (!strcasecmp(v->name, "language"))
1313                                 ast_copy_string(language, v->value, sizeof(language));
1314                         else if (!strcasecmp(v->name, "extension"))
1315                                 ast_copy_string(exten, v->value, sizeof(exten));
1316                         else if (!strcasecmp(v->name, "input_device"))
1317                                 ast_copy_string(indevname, v->value, sizeof(indevname));
1318                         else if (!strcasecmp(v->name, "output_device"))
1319                                 ast_copy_string(outdevname, v->value, sizeof(outdevname));
1320                         else if (!strcasecmp(v->name, "mohinterpret"))
1321                                 ast_copy_string(mohinterpret, v->value, sizeof(mohinterpret));
1322                 }
1323                 ast_config_destroy(cfg);
1324         }
1325         res = pipe(sndcmd);
1326         if (res) {
1327                 ast_log(LOG_ERROR, "Unable to create pipe\n");
1328                 return -1;
1329         }
1330         res = soundcard_init();
1331         if (res < 0) {
1332                 if (option_verbose > 1) {
1333                         ast_verbose(VERBOSE_PREFIX_2 "No sound card detected -- console channel will be unavailable\n");
1334                         ast_verbose(VERBOSE_PREFIX_2 "Turn off ALSA support by adding 'noload=chan_alsa.so' in /etc/asterisk/modules.conf\n");
1335                 }
1336                 return 0;
1337         }
1338
1339         res = ast_channel_register(&alsa_tech);
1340         if (res < 0) {
1341                 ast_log(LOG_ERROR, "Unable to register channel class 'Console'\n");
1342                 return -1;
1343         }
1344         ast_cli_register_multiple(cli_alsa, sizeof(cli_alsa) / sizeof(struct ast_cli_entry));
1345
1346         ast_pthread_create_background(&sthread, NULL, sound_thread, NULL);
1347 #ifdef ALSA_MONITOR
1348         if (alsa_monitor_start())
1349                 ast_log(LOG_ERROR, "Problem starting Monitoring\n");
1350 #endif
1351         return 0;
1352 }
1353
1354 static int unload_module(void)
1355 {
1356         ast_channel_unregister(&alsa_tech);
1357         ast_cli_unregister_multiple(cli_alsa, sizeof(cli_alsa) / sizeof(struct ast_cli_entry));
1358
1359         if (alsa.icard)
1360                 snd_pcm_close(alsa.icard);
1361         if (alsa.ocard)
1362                 snd_pcm_close(alsa.ocard);
1363         if (sndcmd[0] > 0) {
1364                 close(sndcmd[0]);
1365                 close(sndcmd[1]);
1366         }
1367         if (alsa.owner)
1368                 ast_softhangup(alsa.owner, AST_SOFTHANGUP_APPUNLOAD);
1369         if (alsa.owner)
1370                 return -1;
1371         return 0;
1372 }
1373
1374 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "ALSA Console Channel Driver");