Fri Aug 17 00:17:27 2018

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 %u\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(%lu 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 %lu: %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 526 of file chan_alsa.c.

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

00527 {
00528    struct chan_alsa_pvt *p = newchan->tech_pvt;
00529 
00530    ast_mutex_lock(&alsalock);
00531    p->owner = newchan;
00532    ast_mutex_unlock(&alsalock);
00533 
00534    return 0;
00535 }

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 537 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.

00538 {
00539    int res = 0;
00540 
00541    ast_mutex_lock(&alsalock);
00542 
00543    switch (cond) {
00544    case AST_CONTROL_BUSY:
00545    case AST_CONTROL_CONGESTION:
00546    case AST_CONTROL_RINGING:
00547    case AST_CONTROL_INCOMPLETE:
00548    case -1:
00549       res = -1;  /* Ask for inband indications */
00550       break;
00551    case AST_CONTROL_PROGRESS:
00552    case AST_CONTROL_PROCEEDING:
00553    case AST_CONTROL_VIDUPDATE:
00554    case AST_CONTROL_SRCUPDATE:
00555       break;
00556    case AST_CONTROL_HOLD:
00557       ast_verbose(" << Console Has Been Placed on Hold >> \n");
00558       ast_moh_start(chan, data, mohinterpret);
00559       break;
00560    case AST_CONTROL_UNHOLD:
00561       ast_verbose(" << Console Has Been Retrieved from Hold >> \n");
00562       ast_moh_stop(chan);
00563       break;
00564    default:
00565       ast_log(LOG_WARNING, "Don't know how to display condition %d on %s\n", cond, chan->name);
00566       res = -1;
00567    }
00568 
00569    ast_mutex_unlock(&alsalock);
00570 
00571    return res;
00572 }

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

Definition at line 574 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().

00575 {
00576    struct ast_channel *tmp = NULL;
00577 
00578    if (!(tmp = ast_channel_alloc(1, state, 0, 0, "", p->exten, p->context, linkedid, 0, "ALSA/%s", indevname)))
00579       return NULL;
00580 
00581    tmp->tech = &alsa_tech;
00582    ast_channel_set_fd(tmp, 0, readdev);
00583    tmp->nativeformats = AST_FORMAT_SLINEAR;
00584    tmp->readformat = AST_FORMAT_SLINEAR;
00585    tmp->writeformat = AST_FORMAT_SLINEAR;
00586    tmp->tech_pvt = p;
00587    if (!ast_strlen_zero(p->context))
00588       ast_copy_string(tmp->context, p->context, sizeof(tmp->context));
00589    if (!ast_strlen_zero(p->exten))
00590       ast_copy_string(tmp->exten, p->exten, sizeof(tmp->exten));
00591    if (!ast_strlen_zero(language))
00592       ast_string_field_set(tmp, language, language);
00593    p->owner = tmp;
00594    ast_module_ref(ast_module_info->self);
00595    ast_jb_configure(tmp, &global_jbconf);
00596    if (state != AST_STATE_DOWN) {
00597       if (ast_pbx_start(tmp)) {
00598          ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00599          ast_hangup(tmp);
00600          tmp = NULL;
00601       }
00602    }
00603 
00604    return tmp;
00605 }

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 
00486    /* Return NULL frame on error */
00487    if (r < 0) {
00488       ast_mutex_unlock(&alsalock);
00489       return &f;
00490    }
00491 
00492    /* Update positions */
00493    readpos += r;
00494    left -= r;
00495 
00496    if (readpos >= FRAME_SIZE) {
00497       /* A real frame */
00498       readpos = 0;
00499       left = FRAME_SIZE;
00500       if (chan->_state != AST_STATE_UP) {
00501          /* Don't transmit unless it's up */
00502          ast_mutex_unlock(&alsalock);
00503          return &f;
00504       }
00505       if (mute) {
00506          /* Don't transmit if muted */
00507          ast_mutex_unlock(&alsalock);
00508          return &f;
00509       }
00510 
00511       f.frametype = AST_FRAME_VOICE;
00512       f.subclass.codec = AST_FORMAT_SLINEAR;
00513       f.samples = FRAME_SIZE;
00514       f.datalen = FRAME_SIZE * 2;
00515       f.data.ptr = buf;
00516       f.offset = AST_FRIENDLY_OFFSET;
00517       f.src = "Console";
00518       f.mallocd = 0;
00519 
00520    }
00521    ast_mutex_unlock(&alsalock);
00522 
00523    return &f;
00524 }

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 607 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.

00608 {
00609    format_t oldformat = fmt;
00610    char buf[256];
00611    struct ast_channel *tmp = NULL;
00612 
00613    if (!(fmt &= AST_FORMAT_SLINEAR)) {
00614       ast_log(LOG_NOTICE, "Asked to get a channel of format '%s'\n", ast_getformatname_multiple(buf, sizeof(buf), oldformat));
00615       return NULL;
00616    }
00617 
00618    ast_mutex_lock(&alsalock);
00619 
00620    if (alsa.owner) {
00621       ast_log(LOG_NOTICE, "Already have a call on the ALSA channel\n");
00622       *cause = AST_CAUSE_BUSY;
00623    } else if (!(tmp = alsa_new(&alsa, AST_STATE_DOWN, requestor ? requestor->linkedid : NULL))) {
00624       ast_log(LOG_WARNING, "Unable to create new ALSA channel\n");
00625    }
00626 
00627    ast_mutex_unlock(&alsalock);
00628 
00629    return tmp;
00630 }

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 632 of file chan_alsa.c.

References ast_strdup, ast_strlen_zero(), and MIN.

Referenced by console_autoanswer().

00633 {
00634    switch (state) {
00635       case 0:
00636          if (!ast_strlen_zero(word) && !strncasecmp(word, "on", MIN(strlen(word), 2)))
00637             return ast_strdup("on");
00638       case 1:
00639          if (!ast_strlen_zero(word) && !strncasecmp(word, "off", MIN(strlen(word), 3)))
00640             return ast_strdup("off");
00641       default:
00642          return NULL;
00643    }
00644 
00645    return NULL;
00646 }

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

Definition at line 684 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.

00685 {
00686    char *res = CLI_SUCCESS;
00687 
00688    switch (cmd) {
00689    case CLI_INIT:
00690       e->command = "console answer";
00691       e->usage =
00692          "Usage: console answer\n"
00693          "       Answers an incoming call on the console (ALSA) channel.\n";
00694 
00695       return NULL;
00696    case CLI_GENERATE:
00697       return NULL; 
00698    }
00699 
00700    if (a->argc != 2)
00701       return CLI_SHOWUSAGE;
00702 
00703    ast_mutex_lock(&alsalock);
00704 
00705    if (!alsa.owner) {
00706       ast_cli(a->fd, "No one is calling us\n");
00707       res = CLI_FAILURE;
00708    } else {
00709       if (mute) {
00710          ast_verbose( " << Muted >> \n" );
00711       }
00712       hookstate = 1;
00713       grab_owner();
00714       if (alsa.owner) {
00715          ast_queue_control(alsa.owner, AST_CONTROL_ANSWER);
00716          ast_channel_unlock(alsa.owner);
00717       }
00718    }
00719 
00720    if (!noaudiocapture) {
00721       snd_pcm_prepare(alsa.icard);
00722       snd_pcm_start(alsa.icard);
00723    }
00724 
00725    ast_mutex_unlock(&alsalock);
00726 
00727    return res;
00728 }

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

Definition at line 648 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.

00649 {
00650    char *res = CLI_SUCCESS;
00651 
00652    switch (cmd) {
00653    case CLI_INIT:
00654       e->command = "console autoanswer";
00655       e->usage =
00656          "Usage: console autoanswer [on|off]\n"
00657          "       Enables or disables autoanswer feature.  If used without\n"
00658          "       argument, displays the current on/off status of autoanswer.\n"
00659          "       The default value of autoanswer is in 'alsa.conf'.\n";
00660       return NULL;
00661    case CLI_GENERATE:
00662       return autoanswer_complete(a->line, a->word, a->pos, a->n);
00663    }
00664 
00665    if ((a->argc != 2) && (a->argc != 3))
00666       return CLI_SHOWUSAGE;
00667 
00668    ast_mutex_lock(&alsalock);
00669    if (a->argc == 2) {
00670       ast_cli(a->fd, "Auto answer is %s.\n", autoanswer ? "on" : "off");
00671    } else {
00672       if (!strcasecmp(a->argv[2], "on"))
00673          autoanswer = -1;
00674       else if (!strcasecmp(a->argv[2], "off"))
00675          autoanswer = 0;
00676       else
00677          res = CLI_SHOWUSAGE;
00678    }
00679    ast_mutex_unlock(&alsalock);
00680 
00681    return res;
00682 }

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

Definition at line 817 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.

00818 {
00819    char tmp[256], *tmp2;
00820    char *mye, *myc;
00821    const char *d;
00822    char *res = CLI_SUCCESS;
00823 
00824    switch (cmd) {
00825    case CLI_INIT:
00826       e->command = "console dial";
00827       e->usage =
00828          "Usage: console dial [extension[@context]]\n"
00829          "       Dials a given extension (and context if specified)\n";
00830       return NULL;
00831    case CLI_GENERATE:
00832       return NULL;
00833    }
00834 
00835    if ((a->argc != 2) && (a->argc != 3))
00836       return CLI_SHOWUSAGE;
00837 
00838    ast_mutex_lock(&alsalock);
00839 
00840    if (alsa.owner) {
00841       if (a->argc == 3) {
00842          if (alsa.owner) {
00843             for (d = a->argv[2]; *d; d++) {
00844                struct ast_frame f = { .frametype = AST_FRAME_DTMF, .subclass.integer = *d };
00845 
00846                ast_queue_frame(alsa.owner, &f);
00847             }
00848          }
00849       } else {
00850          ast_cli(a->fd, "You're already in a call.  You can use this only to dial digits until you hangup\n");
00851          res = CLI_FAILURE;
00852       }
00853    } else {
00854       mye = exten;
00855       myc = context;
00856       if (a->argc == 3) {
00857          char *stringp = NULL;
00858 
00859          ast_copy_string(tmp, a->argv[2], sizeof(tmp));
00860          stringp = tmp;
00861          strsep(&stringp, "@");
00862          tmp2 = strsep(&stringp, "@");
00863          if (!ast_strlen_zero(tmp))
00864             mye = tmp;
00865          if (!ast_strlen_zero(tmp2))
00866             myc = tmp2;
00867       }
00868       if (ast_exists_extension(NULL, myc, mye, 1, NULL)) {
00869          ast_copy_string(alsa.exten, mye, sizeof(alsa.exten));
00870          ast_copy_string(alsa.context, myc, sizeof(alsa.context));
00871          hookstate = 1;
00872          alsa_new(&alsa, AST_STATE_RINGING, NULL);
00873       } else
00874          ast_cli(a->fd, "No such extension '%s' in context '%s'\n", mye, myc);
00875    }
00876 
00877    ast_mutex_unlock(&alsalock);
00878 
00879    return res;
00880 }

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

Definition at line 779 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.

00780 {
00781    char *res = CLI_SUCCESS;
00782 
00783    switch (cmd) {
00784    case CLI_INIT:
00785       e->command = "console hangup";
00786       e->usage =
00787          "Usage: console hangup\n"
00788          "       Hangs up any call currently placed on the console.\n";
00789       return NULL;
00790    case CLI_GENERATE:
00791       return NULL; 
00792    }
00793  
00794 
00795    if (a->argc != 2)
00796       return CLI_SHOWUSAGE;
00797 
00798    ast_mutex_lock(&alsalock);
00799 
00800    if (!alsa.owner && !hookstate) {
00801       ast_cli(a->fd, "No call to hangup\n");
00802       res = CLI_FAILURE;
00803    } else {
00804       hookstate = 0;
00805       grab_owner();
00806       if (alsa.owner) {
00807          ast_queue_hangup_with_cause(alsa.owner, AST_CAUSE_NORMAL_CLEARING);
00808          ast_channel_unlock(alsa.owner);
00809       }
00810    }
00811 
00812    ast_mutex_unlock(&alsalock);
00813 
00814    return res;
00815 }

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

Definition at line 882 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.

00883 {
00884    int toggle = 0;
00885    char *res = CLI_SUCCESS;
00886 
00887    switch (cmd) {
00888    case CLI_INIT:
00889       e->command = "console {mute|unmute} [toggle]";
00890       e->usage =
00891          "Usage: console {mute|unmute} [toggle]\n"
00892          "       Mute/unmute the microphone.\n";
00893       return NULL;
00894    case CLI_GENERATE:
00895       return NULL;
00896    }
00897 
00898 
00899    if (a->argc > 3) {
00900       return CLI_SHOWUSAGE;
00901    }
00902 
00903    if (a->argc == 3) {
00904       if (strcasecmp(a->argv[2], "toggle"))
00905          return CLI_SHOWUSAGE;
00906       toggle = 1;
00907    }
00908 
00909    if (a->argc < 2) {
00910       return CLI_SHOWUSAGE;
00911    }
00912 
00913    if (!strcasecmp(a->argv[1], "mute")) {
00914       mute = toggle ? !mute : 1;
00915    } else if (!strcasecmp(a->argv[1], "unmute")) {
00916       mute = toggle ? !mute : 0;
00917    } else {
00918       return CLI_SHOWUSAGE;
00919    }
00920 
00921    ast_cli(a->fd, "Console mic is %s\n", mute ? "off" : "on");
00922 
00923    return res;
00924 }

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

Definition at line 730 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.

00731 {
00732    int tmparg = 3;
00733    char *res = CLI_SUCCESS;
00734 
00735    switch (cmd) {
00736    case CLI_INIT:
00737       e->command = "console send text";
00738       e->usage =
00739          "Usage: console send text <message>\n"
00740          "       Sends a text message for display on the remote terminal.\n";
00741       return NULL;
00742    case CLI_GENERATE:
00743       return NULL; 
00744    }
00745 
00746    if (a->argc < 3)
00747       return CLI_SHOWUSAGE;
00748 
00749    ast_mutex_lock(&alsalock);
00750 
00751    if (!alsa.owner) {
00752       ast_cli(a->fd, "No channel active\n");
00753       res = CLI_FAILURE;
00754    } else {
00755       struct ast_frame f = { AST_FRAME_TEXT };
00756       char text2send[256] = "";
00757 
00758       while (tmparg < a->argc) {
00759          strncat(text2send, a->argv[tmparg++], sizeof(text2send) - strlen(text2send) - 1);
00760          strncat(text2send, " ", sizeof(text2send) - strlen(text2send) - 1);
00761       }
00762 
00763       text2send[strlen(text2send) - 1] = '\n';
00764       f.data.ptr = text2send;
00765       f.datalen = strlen(text2send) + 1;
00766       grab_owner();
00767       if (alsa.owner) {
00768          ast_queue_frame(alsa.owner, &f);
00769          ast_queue_control(alsa.owner, AST_CONTROL_ANSWER);
00770          ast_channel_unlock(alsa.owner);
00771       }
00772    }
00773 
00774    ast_mutex_unlock(&alsalock);
00775 
00776    return res;
00777 }

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 935 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.

00936 {
00937    struct ast_config *cfg;
00938    struct ast_variable *v;
00939    struct ast_flags config_flags = { 0 };
00940 
00941    /* Copy the default jb config over global_jbconf */
00942    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
00943 
00944    strcpy(mohinterpret, "default");
00945 
00946    if (!(cfg = ast_config_load(config, config_flags))) {
00947       ast_log(LOG_ERROR, "Unable to read ALSA configuration file %s.  Aborting.\n", config);
00948       return AST_MODULE_LOAD_DECLINE;
00949    } else if (cfg == CONFIG_STATUS_FILEINVALID) {
00950       ast_log(LOG_ERROR, "%s is in an invalid format.  Aborting.\n", config);
00951       return AST_MODULE_LOAD_DECLINE;
00952    }
00953 
00954    v = ast_variable_browse(cfg, "general");
00955    for (; v; v = v->next) {
00956       /* handle jb conf */
00957       if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
00958          continue;
00959       }
00960 
00961       if (!strcasecmp(v->name, "autoanswer")) {
00962          autoanswer = ast_true(v->value);
00963       } else if (!strcasecmp(v->name, "mute")) {
00964          mute = ast_true(v->value);
00965       } else if (!strcasecmp(v->name, "noaudiocapture")) {
00966          noaudiocapture = ast_true(v->value);
00967       } else if (!strcasecmp(v->name, "silencesuppression")) {
00968          silencesuppression = ast_true(v->value);
00969       } else if (!strcasecmp(v->name, "silencethreshold")) {
00970          silencethreshold = atoi(v->value);
00971       } else if (!strcasecmp(v->name, "context")) {
00972          ast_copy_string(context, v->value, sizeof(context));
00973       } else if (!strcasecmp(v->name, "language")) {
00974          ast_copy_string(language, v->value, sizeof(language));
00975       } else if (!strcasecmp(v->name, "extension")) {
00976          ast_copy_string(exten, v->value, sizeof(exten));
00977       } else if (!strcasecmp(v->name, "input_device")) {
00978          ast_copy_string(indevname, v->value, sizeof(indevname));
00979       } else if (!strcasecmp(v->name, "output_device")) {
00980          ast_copy_string(outdevname, v->value, sizeof(outdevname));
00981       } else if (!strcasecmp(v->name, "mohinterpret")) {
00982          ast_copy_string(mohinterpret, v->value, sizeof(mohinterpret));
00983       }
00984    }
00985    ast_config_destroy(cfg);
00986 
00987    if (soundcard_init() < 0) {
00988       ast_verb(2, "No sound card detected -- console channel will be unavailable\n");
00989       ast_verb(2, "Turn off ALSA support by adding 'noload=chan_alsa.so' in /etc/asterisk/modules.conf\n");
00990       return AST_MODULE_LOAD_DECLINE;
00991    }
00992 
00993    if (ast_channel_register(&alsa_tech)) {
00994       ast_log(LOG_ERROR, "Unable to register channel class 'Console'\n");
00995       return AST_MODULE_LOAD_FAILURE;
00996    }
00997 
00998    ast_cli_register_multiple(cli_alsa, ARRAY_LEN(cli_alsa));
00999 
01000    return AST_MODULE_LOAD_SUCCESS;
01001 }

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 1003 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.

01004 {
01005    ast_channel_unregister(&alsa_tech);
01006    ast_cli_unregister_multiple(cli_alsa, ARRAY_LEN(cli_alsa));
01007 
01008    if (alsa.icard)
01009       snd_pcm_close(alsa.icard);
01010    if (alsa.ocard)
01011       snd_pcm_close(alsa.ocard);
01012    if (alsa.owner)
01013       ast_softhangup(alsa.owner, AST_SOFTHANGUP_APPUNLOAD);
01014    if (alsa.owner)
01015       return -1;
01016 
01017    return 0;
01018 }


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 926 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_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(), expand_gosub_args(), 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.


Generated on 17 Aug 2018 for Asterisk - The Open Source Telephony Project by  doxygen 1.6.1