Tue Aug 20 16:34:49 2013

Asterisk developer's documentation


chan_alsa.c File Reference

ALSA sound card channel driver. More...

#include "asterisk.h"
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <alsa/asoundlib.h>
#include "asterisk/frame.h"
#include "asterisk/channel.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/config.h"
#include "asterisk/cli.h"
#include "asterisk/utils.h"
#include "asterisk/causes.h"
#include "asterisk/endian.h"
#include "asterisk/stringfields.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/musiconhold.h"
#include "asterisk/poll-compat.h"

Go to the source code of this file.

Data Structures

struct  chan_alsa_pvt

Defines

#define ALSA_INDEV   "default"
#define ALSA_OUTDEV   "default"
#define ALSA_PCM_NEW_HW_PARAMS_API
#define ALSA_PCM_NEW_SW_PARAMS_API
#define BUFFER_FMT   ((buffersize * 10) << 16) | (0x0006);
#define DEBUG   0
#define DESIRED_RATE   8000
#define FRAME_SIZE   160
#define MAX_BUFFER_SIZE   100
#define MIN_SWITCH_TIME   600
#define PERIOD_FRAMES   80

Functions

static int alsa_answer (struct ast_channel *c)
static int alsa_call (struct ast_channel *c, char *dest, int timeout)
static snd_pcm_t * alsa_card_init (char *dev, snd_pcm_stream_t stream)
static int alsa_digit (struct ast_channel *c, char digit, unsigned int duration)
static int alsa_fixup (struct ast_channel *oldchan, struct ast_channel *newchan)
static int alsa_hangup (struct ast_channel *c)
static int alsa_indicate (struct ast_channel *chan, int cond, const void *data, size_t datalen)
static struct ast_channelalsa_new (struct chan_alsa_pvt *p, int state, const char *linkedid)
static struct ast_framealsa_read (struct ast_channel *chan)
static struct ast_channelalsa_request (const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
static int alsa_text (struct ast_channel *c, const char *text)
static int alsa_write (struct ast_channel *chan, struct ast_frame *f)
 AST_MODULE_INFO (ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER,"ALSA Console Channel Driver",.load=load_module,.unload=unload_module,.load_pri=AST_MODPRI_CHANNEL_DRIVER,)
 AST_MUTEX_DEFINE_STATIC (alsalock)
static char * autoanswer_complete (const char *line, const char *word, int pos, int state)
static char * console_answer (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * console_autoanswer (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * console_dial (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * console_hangup (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * console_mute (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * console_sendtext (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static void grab_owner (void)
static int load_module (void)
static int soundcard_init (void)
static int unload_module (void)

Variables

static struct chan_alsa_pvt alsa
static struct ast_channel_tech alsa_tech
static int autoanswer = 1
static struct ast_cli_entry cli_alsa []
static const char config [] = "alsa.conf"
static char context [AST_MAX_CONTEXT] = "default"
static struct ast_jb_conf default_jbconf
static char exten [AST_MAX_EXTENSION] = "s"
static snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE
static struct ast_jb_conf global_jbconf
static int hookstate = 0
static char indevname [50] = ALSA_INDEV
static char language [MAX_LANGUAGE] = ""
static char mohinterpret [MAX_MUSICCLASS]
static int mute = 0
static int noaudiocapture = 0
static char outdevname [50] = ALSA_OUTDEV
static int readdev = -1
static int silencesuppression = 0
static int silencethreshold = 1000
static const char tdesc [] = "ALSA Console Channel Driver"
static int writedev = -1

Detailed Description

ALSA sound card channel driver.

Author:
Matthew Fredrickson <creslin@digium.com>
See also
  • Config_alsa

Definition in file chan_alsa.c.


Define Documentation

#define ALSA_INDEV   "default"

Definition at line 74 of file chan_alsa.c.

#define ALSA_OUTDEV   "default"

Definition at line 75 of file chan_alsa.c.

#define ALSA_PCM_NEW_HW_PARAMS_API

Definition at line 43 of file chan_alsa.c.

#define ALSA_PCM_NEW_SW_PARAMS_API

Definition at line 44 of file chan_alsa.c.

#define BUFFER_FMT   ((buffersize * 10) << 16) | (0x0006);

Definition at line 85 of file chan_alsa.c.

#define DEBUG   0
#define DESIRED_RATE   8000

Definition at line 76 of file chan_alsa.c.

Referenced by alsa_card_init().

#define FRAME_SIZE   160

Definition at line 79 of file chan_alsa.c.

Referenced by alsa_read(), oss_read(), and soundcard_writeframe().

#define MAX_BUFFER_SIZE   100

Definition at line 128 of file chan_alsa.c.

#define MIN_SWITCH_TIME   600

Definition at line 88 of file chan_alsa.c.

#define PERIOD_FRAMES   80

Definition at line 80 of file chan_alsa.c.

Referenced by alsa_card_init().


Function Documentation

static int alsa_answer ( struct ast_channel c  )  [static]

Definition at line 353 of file chan_alsa.c.

References alsa, ast_mutex_lock, ast_mutex_unlock, ast_setstate(), AST_STATE_UP, ast_verbose, and chan_alsa_pvt::icard.

00354 {
00355    ast_mutex_lock(&alsalock);
00356    ast_verbose(" << Console call has been answered >> \n");
00357    ast_setstate(c, AST_STATE_UP);
00358    if (!noaudiocapture) {
00359       snd_pcm_prepare(alsa.icard);
00360       snd_pcm_start(alsa.icard);
00361    }
00362    ast_mutex_unlock(&alsalock);
00363 
00364    return 0;
00365 }

static int alsa_call ( struct ast_channel c,
char *  dest,
int  timeout 
) [static]

Definition at line 317 of file chan_alsa.c.

References alsa, ast_channel_unlock, AST_CONTROL_ANSWER, AST_CONTROL_RINGING, AST_FRAME_CONTROL, ast_indicate(), ast_mutex_lock, ast_mutex_unlock, ast_queue_frame(), ast_verbose, grab_owner(), chan_alsa_pvt::icard, ast_frame_subclass::integer, chan_alsa_pvt::owner, and ast_frame::subclass.

00318 {
00319    struct ast_frame f = { AST_FRAME_CONTROL };
00320 
00321    ast_mutex_lock(&alsalock);
00322    ast_verbose(" << Call placed to '%s' on console >> \n", dest);
00323    if (autoanswer) {
00324       ast_verbose(" << Auto-answered >> \n");
00325       if (mute) {
00326          ast_verbose( " << Muted >> \n" );
00327       }
00328       grab_owner();
00329       if (alsa.owner) {
00330          f.subclass.integer = AST_CONTROL_ANSWER;
00331          ast_queue_frame(alsa.owner, &f);
00332          ast_channel_unlock(alsa.owner);
00333       }
00334    } else {
00335       ast_verbose(" << Type 'answer' to answer, or use 'autoanswer' for future calls >> \n");
00336       grab_owner();
00337       if (alsa.owner) {
00338          f.subclass.integer = AST_CONTROL_RINGING;
00339          ast_queue_frame(alsa.owner, &f);
00340          ast_channel_unlock(alsa.owner);
00341          ast_indicate(alsa.owner, AST_CONTROL_RINGING);
00342       }
00343    }
00344    if (!noaudiocapture) {
00345       snd_pcm_prepare(alsa.icard);
00346       snd_pcm_start(alsa.icard);
00347    }
00348    ast_mutex_unlock(&alsalock);
00349 
00350    return 0;
00351 }

static snd_pcm_t* alsa_card_init ( char *  dev,
snd_pcm_stream_t  stream 
) [static]

Definition at line 165 of file chan_alsa.c.

References ast_alloca, ast_debug, ast_log(), DESIRED_RATE, LOG_ERROR, LOG_WARNING, and PERIOD_FRAMES.

Referenced by soundcard_init().

00166 {
00167    int err;
00168    int direction;
00169    snd_pcm_t *handle = NULL;
00170    snd_pcm_hw_params_t *hwparams = NULL;
00171    snd_pcm_sw_params_t *swparams = NULL;
00172    struct pollfd pfd;
00173    snd_pcm_uframes_t period_size = PERIOD_FRAMES * 4;
00174    snd_pcm_uframes_t buffer_size = 0;
00175    unsigned int rate = DESIRED_RATE;
00176    snd_pcm_uframes_t start_threshold, stop_threshold;
00177 
00178    err = snd_pcm_open(&handle, dev, stream, SND_PCM_NONBLOCK);
00179    if (err < 0) {
00180       ast_log(LOG_ERROR, "snd_pcm_open failed: %s\n", snd_strerror(err));
00181       return NULL;
00182    } else {
00183       ast_debug(1, "Opening device %s in %s mode\n", dev, (stream == SND_PCM_STREAM_CAPTURE) ? "read" : "write");
00184    }
00185 
00186    hwparams = ast_alloca(snd_pcm_hw_params_sizeof());
00187    memset(hwparams, 0, snd_pcm_hw_params_sizeof());
00188    snd_pcm_hw_params_any(handle, hwparams);
00189 
00190    err = snd_pcm_hw_params_set_access(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED);
00191    if (err < 0)
00192       ast_log(LOG_ERROR, "set_access failed: %s\n", snd_strerror(err));
00193 
00194    err = snd_pcm_hw_params_set_format(handle, hwparams, format);
00195    if (err < 0)
00196       ast_log(LOG_ERROR, "set_format failed: %s\n", snd_strerror(err));
00197 
00198    err = snd_pcm_hw_params_set_channels(handle, hwparams, 1);
00199    if (err < 0)
00200       ast_log(LOG_ERROR, "set_channels failed: %s\n", snd_strerror(err));
00201 
00202    direction = 0;
00203    err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &rate, &direction);
00204    if (rate != DESIRED_RATE)
00205       ast_log(LOG_WARNING, "Rate not correct, requested %d, got %d\n", DESIRED_RATE, rate);
00206 
00207    direction = 0;
00208    err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, &period_size, &direction);
00209    if (err < 0)
00210       ast_log(LOG_ERROR, "period_size(%ld frames) is bad: %s\n", period_size, snd_strerror(err));
00211    else {
00212       ast_debug(1, "Period size is %d\n", err);
00213    }
00214 
00215    buffer_size = 4096 * 2;    /* period_size * 16; */
00216    err = snd_pcm_hw_params_set_buffer_size_near(handle, hwparams, &buffer_size);
00217    if (err < 0)
00218       ast_log(LOG_WARNING, "Problem setting buffer size of %ld: %s\n", buffer_size, snd_strerror(err));
00219    else {
00220       ast_debug(1, "Buffer size is set to %d frames\n", err);
00221    }
00222 
00223    err = snd_pcm_hw_params(handle, hwparams);
00224    if (err < 0)
00225       ast_log(LOG_ERROR, "Couldn't set the new hw params: %s\n", snd_strerror(err));
00226 
00227    swparams = ast_alloca(snd_pcm_sw_params_sizeof());
00228    memset(swparams, 0, snd_pcm_sw_params_sizeof());
00229    snd_pcm_sw_params_current(handle, swparams);
00230 
00231    if (stream == SND_PCM_STREAM_PLAYBACK)
00232       start_threshold = period_size;
00233    else
00234       start_threshold = 1;
00235 
00236    err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
00237    if (err < 0)
00238       ast_log(LOG_ERROR, "start threshold: %s\n", snd_strerror(err));
00239 
00240    if (stream == SND_PCM_STREAM_PLAYBACK)
00241       stop_threshold = buffer_size;
00242    else
00243       stop_threshold = buffer_size;
00244 
00245    err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
00246    if (err < 0)
00247       ast_log(LOG_ERROR, "stop threshold: %s\n", snd_strerror(err));
00248 
00249    err = snd_pcm_sw_params(handle, swparams);
00250    if (err < 0)
00251       ast_log(LOG_ERROR, "sw_params: %s\n", snd_strerror(err));
00252 
00253    err = snd_pcm_poll_descriptors_count(handle);
00254    if (err <= 0)
00255       ast_log(LOG_ERROR, "Unable to get a poll descriptors count, error is %s\n", snd_strerror(err));
00256    if (err != 1) {
00257       ast_debug(1, "Can't handle more than one device\n");
00258    }
00259 
00260    snd_pcm_poll_descriptors(handle, &pfd, err);
00261    ast_debug(1, "Acquired fd %d from the poll descriptor\n", pfd.fd);
00262 
00263    if (stream == SND_PCM_STREAM_CAPTURE)
00264       readdev = pfd.fd;
00265    else
00266       writedev = pfd.fd;
00267 
00268    return handle;
00269 }

static int alsa_digit ( struct ast_channel c,
char  digit,
unsigned int  duration 
) [static]

Definition at line 291 of file chan_alsa.c.

References ast_mutex_lock, ast_mutex_unlock, and ast_verbose.

00292 {
00293    ast_mutex_lock(&alsalock);
00294    ast_verbose(" << Console Received digit %c of duration %u ms >> \n", 
00295       digit, duration);
00296    ast_mutex_unlock(&alsalock);
00297 
00298    return 0;
00299 }

static int alsa_fixup ( struct ast_channel oldchan,
struct ast_channel newchan 
) [static]

Definition at line 519 of file chan_alsa.c.

References ast_mutex_lock, ast_mutex_unlock, chan_alsa_pvt::owner, and ast_channel::tech_pvt.

00520 {
00521    struct chan_alsa_pvt *p = newchan->tech_pvt;
00522 
00523    ast_mutex_lock(&alsalock);
00524    p->owner = newchan;
00525    ast_mutex_unlock(&alsalock);
00526 
00527    return 0;
00528 }

static int alsa_hangup ( struct ast_channel c  )  [static]

Definition at line 367 of file chan_alsa.c.

References alsa, ast_module_unref(), ast_mutex_lock, ast_mutex_unlock, ast_verbose, chan_alsa_pvt::icard, chan_alsa_pvt::owner, and ast_channel::tech_pvt.

00368 {
00369    ast_mutex_lock(&alsalock);
00370    c->tech_pvt = NULL;
00371    alsa.owner = NULL;
00372    ast_verbose(" << Hangup on console >> \n");
00373    ast_module_unref(ast_module_info->self);
00374    hookstate = 0;
00375    if (!noaudiocapture) {
00376       snd_pcm_drop(alsa.icard);
00377    }
00378    ast_mutex_unlock(&alsalock);
00379 
00380    return 0;
00381 }

static int alsa_indicate ( struct ast_channel chan,
int  cond,
const void *  data,
size_t  datalen 
) [static]

Definition at line 530 of file chan_alsa.c.

References AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_HOLD, AST_CONTROL_INCOMPLETE, AST_CONTROL_PROCEEDING, AST_CONTROL_PROGRESS, AST_CONTROL_RINGING, AST_CONTROL_SRCUPDATE, AST_CONTROL_UNHOLD, AST_CONTROL_VIDUPDATE, ast_log(), ast_moh_start(), ast_moh_stop(), ast_mutex_lock, ast_mutex_unlock, ast_verbose, and LOG_WARNING.

00531 {
00532    int res = 0;
00533 
00534    ast_mutex_lock(&alsalock);
00535 
00536    switch (cond) {
00537    case AST_CONTROL_BUSY:
00538    case AST_CONTROL_CONGESTION:
00539    case AST_CONTROL_RINGING:
00540    case AST_CONTROL_INCOMPLETE:
00541    case -1:
00542       res = -1;  /* Ask for inband indications */
00543       break;
00544    case AST_CONTROL_PROGRESS:
00545    case AST_CONTROL_PROCEEDING:
00546    case AST_CONTROL_VIDUPDATE:
00547    case AST_CONTROL_SRCUPDATE:
00548       break;
00549    case AST_CONTROL_HOLD:
00550       ast_verbose(" << Console Has Been Placed on Hold >> \n");
00551       ast_moh_start(chan, data, mohinterpret);
00552       break;
00553    case AST_CONTROL_UNHOLD:
00554       ast_verbose(" << Console Has Been Retrieved from Hold >> \n");
00555       ast_moh_stop(chan);
00556       break;
00557    default:
00558       ast_log(LOG_WARNING, "Don't know how to display condition %d on %s\n", cond, chan->name);
00559       res = -1;
00560    }
00561 
00562    ast_mutex_unlock(&alsalock);
00563 
00564    return res;
00565 }

static struct ast_channel* alsa_new ( struct chan_alsa_pvt p,
int  state,
const char *  linkedid 
) [static, read]

Definition at line 567 of file chan_alsa.c.

References ast_channel_alloc, ast_channel_set_fd(), ast_copy_string(), AST_FORMAT_SLINEAR, ast_hangup(), ast_jb_configure(), ast_log(), ast_module_ref(), ast_pbx_start(), AST_STATE_DOWN, ast_string_field_set, ast_strlen_zero(), ast_channel::context, chan_alsa_pvt::context, ast_channel::exten, chan_alsa_pvt::exten, global_jbconf, LOG_WARNING, ast_channel::nativeformats, chan_alsa_pvt::owner, ast_channel::readformat, ast_channel::tech, ast_channel::tech_pvt, and ast_channel::writeformat.

Referenced by alsa_request(), and console_dial().

00568 {
00569    struct ast_channel *tmp = NULL;
00570 
00571    if (!(tmp = ast_channel_alloc(1, state, 0, 0, "", p->exten, p->context, linkedid, 0, "ALSA/%s", indevname)))
00572       return NULL;
00573 
00574    tmp->tech = &alsa_tech;
00575    ast_channel_set_fd(tmp, 0, readdev);
00576    tmp->nativeformats = AST_FORMAT_SLINEAR;
00577    tmp->readformat = AST_FORMAT_SLINEAR;
00578    tmp->writeformat = AST_FORMAT_SLINEAR;
00579    tmp->tech_pvt = p;
00580    if (!ast_strlen_zero(p->context))
00581       ast_copy_string(tmp->context, p->context, sizeof(tmp->context));
00582    if (!ast_strlen_zero(p->exten))
00583       ast_copy_string(tmp->exten, p->exten, sizeof(tmp->exten));
00584    if (!ast_strlen_zero(language))
00585       ast_string_field_set(tmp, language, language);
00586    p->owner = tmp;
00587    ast_module_ref(ast_module_info->self);
00588    ast_jb_configure(tmp, &global_jbconf);
00589    if (state != AST_STATE_DOWN) {
00590       if (ast_pbx_start(tmp)) {
00591          ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00592          ast_hangup(tmp);
00593          tmp = NULL;
00594       }
00595    }
00596 
00597    return tmp;
00598 }

static struct ast_frame * alsa_read ( struct ast_channel chan  )  [static, read]

Definition at line 435 of file chan_alsa.c.

References ast_channel::_state, alsa, AST_FORMAT_SLINEAR, AST_FRAME_NULL, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_mutex_lock, ast_mutex_unlock, AST_STATE_UP, ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, ast_frame::delivery, FRAME_SIZE, ast_frame::frametype, chan_alsa_pvt::icard, ast_frame_subclass::integer, LOG_ERROR, ast_frame::mallocd, ast_frame::offset, ast_frame::ptr, ast_frame::samples, ast_frame::src, and ast_frame::subclass.

00436 {
00437    static struct ast_frame f;
00438    static short __buf[FRAME_SIZE + AST_FRIENDLY_OFFSET / 2];
00439    short *buf;
00440    static int readpos = 0;
00441    static int left = FRAME_SIZE;
00442    snd_pcm_state_t state;
00443    int r = 0;
00444    int off = 0;
00445 
00446    ast_mutex_lock(&alsalock);
00447    f.frametype = AST_FRAME_NULL;
00448    f.subclass.integer = 0;
00449    f.samples = 0;
00450    f.datalen = 0;
00451    f.data.ptr = NULL;
00452    f.offset = 0;
00453    f.src = "Console";
00454    f.mallocd = 0;
00455    f.delivery.tv_sec = 0;
00456    f.delivery.tv_usec = 0;
00457 
00458    if (noaudiocapture) {
00459       /* Return null frame to asterisk*/
00460       ast_mutex_unlock(&alsalock);
00461       return &f;
00462    }
00463 
00464    state = snd_pcm_state(alsa.icard);
00465    if ((state != SND_PCM_STATE_PREPARED) && (state != SND_PCM_STATE_RUNNING)) {
00466       snd_pcm_prepare(alsa.icard);
00467    }
00468 
00469    buf = __buf + AST_FRIENDLY_OFFSET / 2;
00470 
00471    r = snd_pcm_readi(alsa.icard, buf + readpos, left);
00472    if (r == -EPIPE) {
00473 #if DEBUG
00474       ast_log(LOG_ERROR, "XRUN read\n");
00475 #endif
00476       snd_pcm_prepare(alsa.icard);
00477    } else if (r == -ESTRPIPE) {
00478       ast_log(LOG_ERROR, "-ESTRPIPE\n");
00479       snd_pcm_prepare(alsa.icard);
00480    } else if (r < 0) {
00481       ast_log(LOG_ERROR, "Read error: %s\n", snd_strerror(r));
00482    } else if (r >= 0) {
00483       off -= r;
00484    }
00485    /* Update positions */
00486    readpos += r;
00487    left -= r;
00488 
00489    if (readpos >= FRAME_SIZE) {
00490       /* A real frame */
00491       readpos = 0;
00492       left = FRAME_SIZE;
00493       if (chan->_state != AST_STATE_UP) {
00494          /* Don't transmit unless it's up */
00495          ast_mutex_unlock(&alsalock);
00496          return &f;
00497       }
00498       if (mute) {
00499          /* Don't transmit if muted */
00500          ast_mutex_unlock(&alsalock);
00501          return &f;
00502       }
00503 
00504       f.frametype = AST_FRAME_VOICE;
00505       f.subclass.codec = AST_FORMAT_SLINEAR;
00506       f.samples = FRAME_SIZE;
00507       f.datalen = FRAME_SIZE * 2;
00508       f.data.ptr = buf;
00509       f.offset = AST_FRIENDLY_OFFSET;
00510       f.src = "Console";
00511       f.mallocd = 0;
00512 
00513    }
00514    ast_mutex_unlock(&alsalock);
00515 
00516    return &f;
00517 }

static struct ast_channel * alsa_request ( const char *  type,
format_t  format,
const struct ast_channel requestor,
void *  data,
int *  cause 
) [static, read]

Definition at line 600 of file chan_alsa.c.

References alsa, alsa_new(), AST_CAUSE_BUSY, AST_FORMAT_SLINEAR, ast_getformatname_multiple(), ast_log(), ast_mutex_lock, ast_mutex_unlock, AST_STATE_DOWN, LOG_NOTICE, LOG_WARNING, and chan_alsa_pvt::owner.

00601 {
00602    format_t oldformat = fmt;
00603    char buf[256];
00604    struct ast_channel *tmp = NULL;
00605 
00606    if (!(fmt &= AST_FORMAT_SLINEAR)) {
00607       ast_log(LOG_NOTICE, "Asked to get a channel of format '%s'\n", ast_getformatname_multiple(buf, sizeof(buf), oldformat));
00608       return NULL;
00609    }
00610 
00611    ast_mutex_lock(&alsalock);
00612 
00613    if (alsa.owner) {
00614       ast_log(LOG_NOTICE, "Already have a call on the ALSA channel\n");
00615       *cause = AST_CAUSE_BUSY;
00616    } else if (!(tmp = alsa_new(&alsa, AST_STATE_DOWN, requestor ? requestor->linkedid : NULL))) {
00617       ast_log(LOG_WARNING, "Unable to create new ALSA channel\n");
00618    }
00619 
00620    ast_mutex_unlock(&alsalock);
00621 
00622    return tmp;
00623 }

static int alsa_text ( struct ast_channel c,
const char *  text 
) [static]

Definition at line 301 of file chan_alsa.c.

References ast_mutex_lock, ast_mutex_unlock, and ast_verbose.

00302 {
00303    ast_mutex_lock(&alsalock);
00304    ast_verbose(" << Console Received text %s >> \n", text);
00305    ast_mutex_unlock(&alsalock);
00306 
00307    return 0;
00308 }

static int alsa_write ( struct ast_channel chan,
struct ast_frame f 
) [static]

Definition at line 383 of file chan_alsa.c.

References alsa, ast_debug, ast_log(), ast_mutex_lock, ast_mutex_unlock, ast_frame::data, ast_frame::datalen, len(), LOG_ERROR, LOG_NOTICE, LOG_WARNING, chan_alsa_pvt::ocard, and ast_frame::ptr.

00384 {
00385    static char sizbuf[8000];
00386    static int sizpos = 0;
00387    int len = sizpos;
00388    int res = 0;
00389    /* size_t frames = 0; */
00390    snd_pcm_state_t state;
00391 
00392    ast_mutex_lock(&alsalock);
00393 
00394    /* We have to digest the frame in 160-byte portions */
00395    if (f->datalen > sizeof(sizbuf) - sizpos) {
00396       ast_log(LOG_WARNING, "Frame too large\n");
00397       res = -1;
00398    } else {
00399       memcpy(sizbuf + sizpos, f->data.ptr, f->datalen);
00400       len += f->datalen;
00401       state = snd_pcm_state(alsa.ocard);
00402       if (state == SND_PCM_STATE_XRUN)
00403          snd_pcm_prepare(alsa.ocard);
00404       while ((res = snd_pcm_writei(alsa.ocard, sizbuf, len / 2)) == -EAGAIN) {
00405          usleep(1);
00406       }
00407       if (res == -EPIPE) {
00408 #if DEBUG
00409          ast_debug(1, "XRUN write\n");
00410 #endif
00411          snd_pcm_prepare(alsa.ocard);
00412          while ((res = snd_pcm_writei(alsa.ocard, sizbuf, len / 2)) == -EAGAIN) {
00413             usleep(1);
00414          }
00415          if (res != len / 2) {
00416             ast_log(LOG_ERROR, "Write error: %s\n", snd_strerror(res));
00417             res = -1;
00418          } else if (res < 0) {
00419             ast_log(LOG_ERROR, "Write error %s\n", snd_strerror(res));
00420             res = -1;
00421          }
00422       } else {
00423          if (res == -ESTRPIPE)
00424             ast_log(LOG_ERROR, "You've got some big problems\n");
00425          else if (res < 0)
00426             ast_log(LOG_NOTICE, "Error %d on write\n", res);
00427       }
00428    }
00429    ast_mutex_unlock(&alsalock);
00430 
00431    return res >= 0 ? 0 : res;
00432 }

AST_MODULE_INFO ( ASTERISK_GPL_KEY  ,
AST_MODFLAG_LOAD_ORDER  ,
"ALSA Console Channel Driver"  ,
load = load_module,
unload = unload_module,
load_pri = AST_MODPRI_CHANNEL_DRIVER 
)
AST_MUTEX_DEFINE_STATIC ( alsalock   ) 
static char* autoanswer_complete ( const char *  line,
const char *  word,
int  pos,
int  state 
) [static]

Definition at line 625 of file chan_alsa.c.

References ast_strdup, ast_strlen_zero(), and MIN.

Referenced by console_autoanswer().

00626 {
00627    switch (state) {
00628       case 0:
00629          if (!ast_strlen_zero(word) && !strncasecmp(word, "on", MIN(strlen(word), 2)))
00630             return ast_strdup("on");
00631       case 1:
00632          if (!ast_strlen_zero(word) && !strncasecmp(word, "off", MIN(strlen(word), 3)))
00633             return ast_strdup("off");
00634       default:
00635          return NULL;
00636    }
00637 
00638    return NULL;
00639 }

static char* console_answer ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 677 of file chan_alsa.c.

References alsa, ast_cli_args::argc, ast_channel_unlock, ast_cli(), AST_CONTROL_ANSWER, ast_mutex_lock, ast_mutex_unlock, ast_queue_control(), ast_verbose, CLI_FAILURE, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, grab_owner(), chan_alsa_pvt::icard, chan_alsa_pvt::owner, and ast_cli_entry::usage.

00678 {
00679    char *res = CLI_SUCCESS;
00680 
00681    switch (cmd) {
00682    case CLI_INIT:
00683       e->command = "console answer";
00684       e->usage =
00685          "Usage: console answer\n"
00686          "       Answers an incoming call on the console (ALSA) channel.\n";
00687 
00688       return NULL;
00689    case CLI_GENERATE:
00690       return NULL; 
00691    }
00692 
00693    if (a->argc != 2)
00694       return CLI_SHOWUSAGE;
00695 
00696    ast_mutex_lock(&alsalock);
00697 
00698    if (!alsa.owner) {
00699       ast_cli(a->fd, "No one is calling us\n");
00700       res = CLI_FAILURE;
00701    } else {
00702       if (mute) {
00703          ast_verbose( " << Muted >> \n" );
00704       }
00705       hookstate = 1;
00706       grab_owner();
00707       if (alsa.owner) {
00708          ast_queue_control(alsa.owner, AST_CONTROL_ANSWER);
00709          ast_channel_unlock(alsa.owner);
00710       }
00711    }
00712 
00713    if (!noaudiocapture) {
00714       snd_pcm_prepare(alsa.icard);
00715       snd_pcm_start(alsa.icard);
00716    }
00717 
00718    ast_mutex_unlock(&alsalock);
00719 
00720    return res;
00721 }

static char* console_autoanswer ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 641 of file chan_alsa.c.

References ast_cli_args::argc, ast_cli_args::argv, ast_cli(), ast_mutex_lock, ast_mutex_unlock, autoanswer_complete(), CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, ast_cli_args::line, ast_cli_args::n, ast_cli_args::pos, ast_cli_entry::usage, and ast_cli_args::word.

00642 {
00643    char *res = CLI_SUCCESS;
00644 
00645    switch (cmd) {
00646    case CLI_INIT:
00647       e->command = "console autoanswer";
00648       e->usage =
00649          "Usage: console autoanswer [on|off]\n"
00650          "       Enables or disables autoanswer feature.  If used without\n"
00651          "       argument, displays the current on/off status of autoanswer.\n"
00652          "       The default value of autoanswer is in 'alsa.conf'.\n";
00653       return NULL;
00654    case CLI_GENERATE:
00655       return autoanswer_complete(a->line, a->word, a->pos, a->n);
00656    }
00657 
00658    if ((a->argc != 2) && (a->argc != 3))
00659       return CLI_SHOWUSAGE;
00660 
00661    ast_mutex_lock(&alsalock);
00662    if (a->argc == 2) {
00663       ast_cli(a->fd, "Auto answer is %s.\n", autoanswer ? "on" : "off");
00664    } else {
00665       if (!strcasecmp(a->argv[2], "on"))
00666          autoanswer = -1;
00667       else if (!strcasecmp(a->argv[2], "off"))
00668          autoanswer = 0;
00669       else
00670          res = CLI_SHOWUSAGE;
00671    }
00672    ast_mutex_unlock(&alsalock);
00673 
00674    return res;
00675 }

static char* console_dial ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 810 of file chan_alsa.c.

References alsa, alsa_new(), ast_cli_args::argc, ast_cli_args::argv, ast_cli(), ast_copy_string(), ast_exists_extension(), AST_FRAME_DTMF, ast_mutex_lock, ast_mutex_unlock, ast_queue_frame(), AST_STATE_RINGING, ast_strlen_zero(), CLI_FAILURE, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, chan_alsa_pvt::context, chan_alsa_pvt::exten, ast_cli_args::fd, ast_frame::frametype, chan_alsa_pvt::owner, and ast_cli_entry::usage.

00811 {
00812    char tmp[256], *tmp2;
00813    char *mye, *myc;
00814    const char *d;
00815    char *res = CLI_SUCCESS;
00816 
00817    switch (cmd) {
00818    case CLI_INIT:
00819       e->command = "console dial";
00820       e->usage =
00821          "Usage: console dial [extension[@context]]\n"
00822          "       Dials a given extension (and context if specified)\n";
00823       return NULL;
00824    case CLI_GENERATE:
00825       return NULL;
00826    }
00827 
00828    if ((a->argc != 2) && (a->argc != 3))
00829       return CLI_SHOWUSAGE;
00830 
00831    ast_mutex_lock(&alsalock);
00832 
00833    if (alsa.owner) {
00834       if (a->argc == 3) {
00835          if (alsa.owner) {
00836             for (d = a->argv[2]; *d; d++) {
00837                struct ast_frame f = { .frametype = AST_FRAME_DTMF, .subclass.integer = *d };
00838 
00839                ast_queue_frame(alsa.owner, &f);
00840             }
00841          }
00842       } else {
00843          ast_cli(a->fd, "You're already in a call.  You can use this only to dial digits until you hangup\n");
00844          res = CLI_FAILURE;
00845       }
00846    } else {
00847       mye = exten;
00848       myc = context;
00849       if (a->argc == 3) {
00850          char *stringp = NULL;
00851 
00852          ast_copy_string(tmp, a->argv[2], sizeof(tmp));
00853          stringp = tmp;
00854          strsep(&stringp, "@");
00855          tmp2 = strsep(&stringp, "@");
00856          if (!ast_strlen_zero(tmp))
00857             mye = tmp;
00858          if (!ast_strlen_zero(tmp2))
00859             myc = tmp2;
00860       }
00861       if (ast_exists_extension(NULL, myc, mye, 1, NULL)) {
00862          ast_copy_string(alsa.exten, mye, sizeof(alsa.exten));
00863          ast_copy_string(alsa.context, myc, sizeof(alsa.context));
00864          hookstate = 1;
00865          alsa_new(&alsa, AST_STATE_RINGING, NULL);
00866       } else
00867          ast_cli(a->fd, "No such extension '%s' in context '%s'\n", mye, myc);
00868    }
00869 
00870    ast_mutex_unlock(&alsalock);
00871 
00872    return res;
00873 }

static char* console_hangup ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 772 of file chan_alsa.c.

References alsa, ast_cli_args::argc, AST_CAUSE_NORMAL_CLEARING, ast_channel_unlock, ast_cli(), ast_mutex_lock, ast_mutex_unlock, ast_queue_hangup_with_cause(), CLI_FAILURE, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, grab_owner(), chan_alsa_pvt::owner, and ast_cli_entry::usage.

00773 {
00774    char *res = CLI_SUCCESS;
00775 
00776    switch (cmd) {
00777    case CLI_INIT:
00778       e->command = "console hangup";
00779       e->usage =
00780          "Usage: console hangup\n"
00781          "       Hangs up any call currently placed on the console.\n";
00782       return NULL;
00783    case CLI_GENERATE:
00784       return NULL; 
00785    }
00786  
00787 
00788    if (a->argc != 2)
00789       return CLI_SHOWUSAGE;
00790 
00791    ast_mutex_lock(&alsalock);
00792 
00793    if (!alsa.owner && !hookstate) {
00794       ast_cli(a->fd, "No call to hangup\n");
00795       res = CLI_FAILURE;
00796    } else {
00797       hookstate = 0;
00798       grab_owner();
00799       if (alsa.owner) {
00800          ast_queue_hangup_with_cause(alsa.owner, AST_CAUSE_NORMAL_CLEARING);
00801          ast_channel_unlock(alsa.owner);
00802       }
00803    }
00804 
00805    ast_mutex_unlock(&alsalock);
00806 
00807    return res;
00808 }

static char* console_mute ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 875 of file chan_alsa.c.

References ast_cli_args::argc, ast_cli_args::argv, ast_cli(), CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, and ast_cli_entry::usage.

00876 {
00877    int toggle = 0;
00878    char *res = CLI_SUCCESS;
00879 
00880    switch (cmd) {
00881    case CLI_INIT:
00882       e->command = "console {mute|unmute} [toggle]";
00883       e->usage =
00884          "Usage: console {mute|unmute} [toggle]\n"
00885          "       Mute/unmute the microphone.\n";
00886       return NULL;
00887    case CLI_GENERATE:
00888       return NULL;
00889    }
00890 
00891 
00892    if (a->argc > 3) {
00893       return CLI_SHOWUSAGE;
00894    }
00895 
00896    if (a->argc == 3) {
00897       if (strcasecmp(a->argv[2], "toggle"))
00898          return CLI_SHOWUSAGE;
00899       toggle = 1;
00900    }
00901 
00902    if (a->argc < 2) {
00903       return CLI_SHOWUSAGE;
00904    }
00905 
00906    if (!strcasecmp(a->argv[1], "mute")) {
00907       mute = toggle ? !mute : 1;
00908    } else if (!strcasecmp(a->argv[1], "unmute")) {
00909       mute = toggle ? !mute : 0;
00910    } else {
00911       return CLI_SHOWUSAGE;
00912    }
00913 
00914    ast_cli(a->fd, "Console mic is %s\n", mute ? "off" : "on");
00915 
00916    return res;
00917 }

static char* console_sendtext ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 723 of file chan_alsa.c.

References alsa, ast_cli_args::argc, ast_cli_args::argv, ast_channel_unlock, ast_cli(), AST_CONTROL_ANSWER, AST_FRAME_TEXT, ast_mutex_lock, ast_mutex_unlock, ast_queue_control(), ast_queue_frame(), CLI_FAILURE, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_frame::data, ast_frame::datalen, ast_cli_args::fd, grab_owner(), chan_alsa_pvt::owner, ast_frame::ptr, and ast_cli_entry::usage.

00724 {
00725    int tmparg = 3;
00726    char *res = CLI_SUCCESS;
00727 
00728    switch (cmd) {
00729    case CLI_INIT:
00730       e->command = "console send text";
00731       e->usage =
00732          "Usage: console send text <message>\n"
00733          "       Sends a text message for display on the remote terminal.\n";
00734       return NULL;
00735    case CLI_GENERATE:
00736       return NULL; 
00737    }
00738 
00739    if (a->argc < 3)
00740       return CLI_SHOWUSAGE;
00741 
00742    ast_mutex_lock(&alsalock);
00743 
00744    if (!alsa.owner) {
00745       ast_cli(a->fd, "No channel active\n");
00746       res = CLI_FAILURE;
00747    } else {
00748       struct ast_frame f = { AST_FRAME_TEXT };
00749       char text2send[256] = "";
00750 
00751       while (tmparg < a->argc) {
00752          strncat(text2send, a->argv[tmparg++], sizeof(text2send) - strlen(text2send) - 1);
00753          strncat(text2send, " ", sizeof(text2send) - strlen(text2send) - 1);
00754       }
00755 
00756       text2send[strlen(text2send) - 1] = '\n';
00757       f.data.ptr = text2send;
00758       f.datalen = strlen(text2send) + 1;
00759       grab_owner();
00760       if (alsa.owner) {
00761          ast_queue_frame(alsa.owner, &f);
00762          ast_queue_control(alsa.owner, AST_CONTROL_ANSWER);
00763          ast_channel_unlock(alsa.owner);
00764       }
00765    }
00766 
00767    ast_mutex_unlock(&alsalock);
00768 
00769    return res;
00770 }

static void grab_owner ( void   )  [static]

Definition at line 310 of file chan_alsa.c.

References alsa, ast_channel_trylock, DEADLOCK_AVOIDANCE, and chan_alsa_pvt::owner.

Referenced by alsa_call(), console_answer(), console_hangup(), and console_sendtext().

00311 {
00312    while (alsa.owner && ast_channel_trylock(alsa.owner)) {
00313       DEADLOCK_AVOIDANCE(&alsalock);
00314    }
00315 }

static int load_module ( void   )  [static]

Definition at line 928 of file chan_alsa.c.

References ARRAY_LEN, ast_channel_register(), ast_cli_register_multiple(), ast_config_destroy(), ast_config_load, ast_copy_string(), ast_jb_read_conf(), ast_log(), AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_true(), ast_variable_browse(), ast_verb, CONFIG_STATUS_FILEINVALID, global_jbconf, LOG_ERROR, ast_variable::name, ast_variable::next, soundcard_init(), and ast_variable::value.

00929 {
00930    struct ast_config *cfg;
00931    struct ast_variable *v;
00932    struct ast_flags config_flags = { 0 };
00933 
00934    /* Copy the default jb config over global_jbconf */
00935    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
00936 
00937    strcpy(mohinterpret, "default");
00938 
00939    if (!(cfg = ast_config_load(config, config_flags))) {
00940       ast_log(LOG_ERROR, "Unable to read ALSA configuration file %s.  Aborting.\n", config);
00941       return AST_MODULE_LOAD_DECLINE;
00942    } else if (cfg == CONFIG_STATUS_FILEINVALID) {
00943       ast_log(LOG_ERROR, "%s is in an invalid format.  Aborting.\n", config);
00944       return AST_MODULE_LOAD_DECLINE;
00945    }
00946 
00947    v = ast_variable_browse(cfg, "general");
00948    for (; v; v = v->next) {
00949       /* handle jb conf */
00950       if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
00951          continue;
00952       }
00953 
00954       if (!strcasecmp(v->name, "autoanswer")) {
00955          autoanswer = ast_true(v->value);
00956       } else if (!strcasecmp(v->name, "mute")) {
00957          mute = ast_true(v->value);
00958       } else if (!strcasecmp(v->name, "noaudiocapture")) {
00959          noaudiocapture = ast_true(v->value);
00960       } else if (!strcasecmp(v->name, "silencesuppression")) {
00961          silencesuppression = ast_true(v->value);
00962       } else if (!strcasecmp(v->name, "silencethreshold")) {
00963          silencethreshold = atoi(v->value);
00964       } else if (!strcasecmp(v->name, "context")) {
00965          ast_copy_string(context, v->value, sizeof(context));
00966       } else if (!strcasecmp(v->name, "language")) {
00967          ast_copy_string(language, v->value, sizeof(language));
00968       } else if (!strcasecmp(v->name, "extension")) {
00969          ast_copy_string(exten, v->value, sizeof(exten));
00970       } else if (!strcasecmp(v->name, "input_device")) {
00971          ast_copy_string(indevname, v->value, sizeof(indevname));
00972       } else if (!strcasecmp(v->name, "output_device")) {
00973          ast_copy_string(outdevname, v->value, sizeof(outdevname));
00974       } else if (!strcasecmp(v->name, "mohinterpret")) {
00975          ast_copy_string(mohinterpret, v->value, sizeof(mohinterpret));
00976       }
00977    }
00978    ast_config_destroy(cfg);
00979 
00980    if (soundcard_init() < 0) {
00981       ast_verb(2, "No sound card detected -- console channel will be unavailable\n");
00982       ast_verb(2, "Turn off ALSA support by adding 'noload=chan_alsa.so' in /etc/asterisk/modules.conf\n");
00983       return AST_MODULE_LOAD_DECLINE;
00984    }
00985 
00986    if (ast_channel_register(&alsa_tech)) {
00987       ast_log(LOG_ERROR, "Unable to register channel class 'Console'\n");
00988       return AST_MODULE_LOAD_FAILURE;
00989    }
00990 
00991    ast_cli_register_multiple(cli_alsa, ARRAY_LEN(cli_alsa));
00992 
00993    return AST_MODULE_LOAD_SUCCESS;
00994 }

static int soundcard_init ( void   )  [static]

Definition at line 271 of file chan_alsa.c.

References alsa, alsa_card_init(), ast_log(), chan_alsa_pvt::icard, LOG_ERROR, and chan_alsa_pvt::ocard.

Referenced by load_module().

00272 {
00273    if (!noaudiocapture) {
00274       alsa.icard = alsa_card_init(indevname, SND_PCM_STREAM_CAPTURE);
00275       if (!alsa.icard) {
00276          ast_log(LOG_ERROR, "Problem opening alsa capture device\n");
00277          return -1;
00278       }
00279    }
00280 
00281    alsa.ocard = alsa_card_init(outdevname, SND_PCM_STREAM_PLAYBACK);
00282 
00283    if (!alsa.ocard) {
00284       ast_log(LOG_ERROR, "Problem opening ALSA playback device\n");
00285       return -1;
00286    }
00287 
00288    return writedev;
00289 }

static int unload_module ( void   )  [static]

Definition at line 996 of file chan_alsa.c.

References alsa, ARRAY_LEN, ast_channel_unregister(), ast_cli_unregister_multiple(), ast_softhangup(), AST_SOFTHANGUP_APPUNLOAD, chan_alsa_pvt::icard, chan_alsa_pvt::ocard, and chan_alsa_pvt::owner.

00997 {
00998    ast_channel_unregister(&alsa_tech);
00999    ast_cli_unregister_multiple(cli_alsa, ARRAY_LEN(cli_alsa));
01000 
01001    if (alsa.icard)
01002       snd_pcm_close(alsa.icard);
01003    if (alsa.ocard)
01004       snd_pcm_close(alsa.ocard);
01005    if (alsa.owner)
01006       ast_softhangup(alsa.owner, AST_SOFTHANGUP_APPUNLOAD);
01007    if (alsa.owner)
01008       return -1;
01009 
01010    return 0;
01011 }


Variable Documentation

struct chan_alsa_pvt alsa [static]
struct ast_channel_tech alsa_tech [static]

Definition at line 149 of file chan_alsa.c.

int autoanswer = 1 [static]

Definition at line 134 of file chan_alsa.c.

struct ast_cli_entry cli_alsa[] [static]

Definition at line 919 of file chan_alsa.c.

const char config[] = "alsa.conf" [static]

Definition at line 105 of file chan_alsa.c.

char context[AST_MAX_CONTEXT] = "default" [static]

Definition at line 107 of file chan_alsa.c.

Referenced by acf_isexten_exec(), acf_vmcount_exec(), action_atxfer(), action_extensionstate(), action_originate(), action_redirect(), add_peer_mailboxes(), aji_handle_pubsub_event(), aji_mwi_cb(), append_mailbox_mapping(), apply_outgoing(), ast_compile_ael2(), ast_event_hash_mwi(), ast_get_enum(), build_device(), build_peer(), check_access(), check_peer_ok(), complete_dialplan_add_include(), complete_dialplan_remove_extension(), complete_dialplan_remove_include(), config_parse_variables(), create_addr_from_peer(), disa_exec(), extenspy_exec(), extstate_read(), feature_attended_transfer(), feature_blind_transfer(), get_also_info(), get_cid_name(), get_destination(), gtalk_load_config(), handle_cli_dialplan_remove_extension(), handle_request_bye(), handle_request_invite(), handle_request_options(), handle_request_refer(), has_voicemail(), hint_read(), iax2_call(), iax2_transfer(), isexten_function_read(), jingle_load_config(), launch_ha_netscript(), load_config(), local_call(), local_devicestate(), log_exec(), lua_pbx_exec(), lua_register_switches(), lua_sort_extensions(), mkintf(), notify_message(), orig_exten(), pickup_exec(), process_ast_dsp(), queue_mwi_event(), readexten_exec(), register_exten(), register_peer_exten(), reload_config(), retrydial_exec(), set_peer_defaults(), set_pvt_defaults(), sip_alloc(), sla_build_station(), sla_build_trunk(), socket_process(), store_config_core(), unistim_send_mwi_to_peer(), unregister_exten(), update_registry(), and wait_for_answer().

struct ast_jb_conf default_jbconf [static]

Global jitterbuffer configuration - by default, jb is disabled

Note:
Values shown here match the defaults shown in alsa.conf.sample

Definition at line 63 of file chan_alsa.c.

char exten[AST_MAX_EXTENSION] = "s" [static]
snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE [static]
struct ast_jb_conf global_jbconf [static]

Definition at line 70 of file chan_alsa.c.

Referenced by alsa_new(), and load_module().

int hookstate = 0 [static]

Definition at line 112 of file chan_alsa.c.

char indevname[50] = ALSA_INDEV [static]

Definition at line 96 of file chan_alsa.c.

char language[MAX_LANGUAGE] = "" [static]
char mohinterpret[MAX_MUSICCLASS] [static]
int mute = 0 [static]
int noaudiocapture = 0 [static]

Definition at line 136 of file chan_alsa.c.

char outdevname[50] = ALSA_OUTDEV [static]

Definition at line 97 of file chan_alsa.c.

int readdev = -1 [static]

Definition at line 131 of file chan_alsa.c.

int silencesuppression = 0 [static]

Definition at line 99 of file chan_alsa.c.

int silencethreshold = 1000 [static]

Definition at line 100 of file chan_alsa.c.

const char tdesc[] = "ALSA Console Channel Driver" [static]

Definition at line 104 of file chan_alsa.c.

int writedev = -1 [static]

Definition at line 132 of file chan_alsa.c.


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