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