Wed Oct 28 11:45:50 2009

Asterisk developer's documentation


audiohook.c File Reference

Audiohooks Architecture. More...

#include "asterisk.h"
#include <signal.h>
#include "asterisk/channel.h"
#include "asterisk/utils.h"
#include "asterisk/lock.h"
#include "asterisk/linkedlists.h"
#include "asterisk/audiohook.h"
#include "asterisk/slinfactory.h"
#include "asterisk/frame.h"
#include "asterisk/translate.h"

Include dependency graph for audiohook.c:

Go to the source code of this file.

Data Structures

struct  ast_audiohook_list
struct  ast_audiohook_translate

Functions

int ast_audiohook_attach (struct ast_channel *chan, struct ast_audiohook *audiohook)
 Attach audiohook to channel.
int ast_audiohook_destroy (struct ast_audiohook *audiohook)
 Destroys an audiohook structure.
int ast_audiohook_detach (struct ast_audiohook *audiohook)
 Detach audiohook from channel.
int ast_audiohook_detach_list (struct ast_audiohook_list *audiohook_list)
 Detach audiohooks from list and destroy said list.
int ast_audiohook_detach_source (struct ast_channel *chan, const char *source)
 Detach specified source audiohook from channel.
int ast_audiohook_init (struct ast_audiohook *audiohook, enum ast_audiohook_type type, const char *source)
 Initialize an audiohook structure.
void ast_audiohook_move_by_source (struct ast_channel *old_chan, struct ast_channel *new_chan, const char *source)
 Move an audiohook from one channel to a new one.
struct ast_frameast_audiohook_read_frame (struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction, int format)
 Reads a frame in from the audiohook structure.
int ast_audiohook_remove (struct ast_channel *chan, struct ast_audiohook *audiohook)
 Remove an audiohook from a specified channel.
void ast_audiohook_trigger_wait (struct ast_audiohook *audiohook)
 Wait for audiohook trigger to be triggered.
int ast_audiohook_write_frame (struct ast_audiohook *audiohook, enum ast_audiohook_direction direction, struct ast_frame *frame)
 Writes a frame into the audiohook structure.
struct ast_frameast_audiohook_write_list (struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
 Pass a frame off to be handled by the audiohook core.
int ast_channel_audiohook_count_by_source (struct ast_channel *chan, const char *source, enum ast_audiohook_type type)
 Find out how many audiohooks from a certain source exist on a given channel, regardless of status.
int ast_channel_audiohook_count_by_source_running (struct ast_channel *chan, const char *source, enum ast_audiohook_type type)
 Find out how many spies of a certain type exist on a given channel, and are in state running.
static struct ast_frameaudio_audiohook_write_list (struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
 Pass an AUDIO frame off to be handled by the audiohook core.
static struct ast_frameaudiohook_read_frame_both (struct ast_audiohook *audiohook, size_t samples)
static struct ast_frameaudiohook_read_frame_single (struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction)
static struct ast_framedtmf_audiohook_write_list (struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
 Pass a DTMF frame off to be handled by the audiohook core.
static struct ast_audiohookfind_audiohook_by_source (struct ast_audiohook_list *audiohook_list, const char *source)
 find an audiohook based on its source


Detailed Description

Audiohooks Architecture.

Author:
Joshua 'file' Colp <jcolp@digium.com>

Definition in file audiohook.c.


Function Documentation

int ast_audiohook_attach ( struct ast_channel chan,
struct ast_audiohook audiohook 
)

Attach audiohook to channel.

Parameters:
chan Channel
audiohook Audiohook structure
Returns:
Returns 0 on success, -1 on failure

Definition at line 330 of file audiohook.c.

References AST_AUDIOHOOK_STATUS_RUNNING, AST_AUDIOHOOK_TYPE_MANIPULATE, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, ast_calloc, ast_channel_lock, ast_channel_unlock, AST_LIST_HEAD_INIT_NOLOCK, AST_LIST_INSERT_TAIL, ast_channel::audiohooks, ast_audiohook_list::manipulate_list, ast_audiohook_list::spy_list, ast_audiohook::status, ast_audiohook::type, and ast_audiohook_list::whisper_list.

Referenced by ast_audiohook_move_by_source(), enable_jack_hook(), start_spying(), startmon(), and volume_write().

00331 {
00332    ast_channel_lock(chan);
00333 
00334    if (!chan->audiohooks) {
00335       /* Whoops... allocate a new structure */
00336       if (!(chan->audiohooks = ast_calloc(1, sizeof(*chan->audiohooks)))) {
00337          ast_channel_unlock(chan);
00338          return -1;
00339       }
00340       AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->spy_list);
00341       AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->whisper_list);
00342       AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->manipulate_list);
00343    }
00344 
00345    /* Drop into respective list */
00346    if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY)
00347       AST_LIST_INSERT_TAIL(&chan->audiohooks->spy_list, audiohook, list);
00348    else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER)
00349       AST_LIST_INSERT_TAIL(&chan->audiohooks->whisper_list, audiohook, list);
00350    else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE)
00351       AST_LIST_INSERT_TAIL(&chan->audiohooks->manipulate_list, audiohook, list);
00352 
00353    /* Change status over to running since it is now attached */
00354    audiohook->status = AST_AUDIOHOOK_STATUS_RUNNING;
00355 
00356    ast_channel_unlock(chan);
00357 
00358    return 0;
00359 }

int ast_audiohook_destroy ( struct ast_audiohook audiohook  ) 

Destroys an audiohook structure.

Parameters:
audiohook Audiohook structure
Returns:
Returns 0 on success, -1 on failure

Definition at line 91 of file audiohook.c.

References AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, ast_cond_destroy(), ast_mutex_destroy(), ast_slinfactory_destroy(), ast_translator_free_path(), ast_audiohook::lock, ast_audiohook::read_factory, ast_audiohook::trans_pvt, ast_audiohook::trigger, ast_audiohook::type, and ast_audiohook::write_factory.

Referenced by channel_spy(), destroy_callback(), destroy_jack_data(), launch_monitor_thread(), and mixmonitor_thread().

00092 {
00093    /* Drop the factories used by this audiohook type */
00094    switch (audiohook->type) {
00095    case AST_AUDIOHOOK_TYPE_SPY:
00096       ast_slinfactory_destroy(&audiohook->read_factory);
00097    case AST_AUDIOHOOK_TYPE_WHISPER:
00098       ast_slinfactory_destroy(&audiohook->write_factory);
00099       break;
00100    default:
00101       break;
00102    }
00103 
00104    /* Destroy translation path if present */
00105    if (audiohook->trans_pvt)
00106       ast_translator_free_path(audiohook->trans_pvt);
00107 
00108    /* Lock and trigger be gone! */
00109    ast_cond_destroy(&audiohook->trigger);
00110    ast_mutex_destroy(&audiohook->lock);
00111 
00112    return 0;
00113 }

int ast_audiohook_detach ( struct ast_audiohook audiohook  ) 

Detach audiohook from channel.

Parameters:
audiohook Audiohook structure
Returns:
Returns 0 on success, -1 on failure

Definition at line 365 of file audiohook.c.

References AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_SHUTDOWN, ast_audiohook_trigger_wait(), and ast_audiohook::status.

Referenced by channel_spy(), disable_jack_hook(), and mixmonitor_thread().

00366 {
00367    if (audiohook->status == AST_AUDIOHOOK_STATUS_DONE)
00368       return 0;
00369 
00370    audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN;
00371 
00372    while (audiohook->status != AST_AUDIOHOOK_STATUS_DONE)
00373       ast_audiohook_trigger_wait(audiohook);
00374 
00375    return 0;
00376 }

int ast_audiohook_detach_list ( struct ast_audiohook_list audiohook_list  ) 

Detach audiohooks from list and destroy said list.

Parameters:
audiohook_list List of audiohooks
Returns:
Returns 0 on success, -1 on failure

Definition at line 382 of file audiohook.c.

References ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, ast_audiohook_unlock, ast_cond_signal(), ast_free, AST_LIST_REMOVE_HEAD, ast_translator_free_path(), ast_audiohook_list::in_translate, ast_audiohook::list, ast_audiohook::manipulate_callback, ast_audiohook_list::manipulate_list, ast_audiohook_list::out_translate, ast_audiohook_list::spy_list, ast_audiohook::status, ast_audiohook_translate::trans_pvt, ast_audiohook::trigger, and ast_audiohook_list::whisper_list.

Referenced by ast_hangup().

00383 {
00384    int i = 0;
00385    struct ast_audiohook *audiohook = NULL;
00386 
00387    /* Drop any spies */
00388    while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->spy_list, list))) {
00389       ast_audiohook_lock(audiohook);
00390       audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00391       ast_cond_signal(&audiohook->trigger);
00392       ast_audiohook_unlock(audiohook);
00393    }
00394 
00395    /* Drop any whispering sources */
00396    while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->whisper_list, list))) {
00397       ast_audiohook_lock(audiohook);
00398       audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00399       ast_cond_signal(&audiohook->trigger);
00400       ast_audiohook_unlock(audiohook);
00401    }
00402 
00403    /* Drop any manipulaters */
00404    while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->manipulate_list, list))) {
00405       ast_audiohook_lock(audiohook);
00406       audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00407       ast_audiohook_unlock(audiohook);
00408       audiohook->manipulate_callback(audiohook, NULL, NULL, 0);
00409    }
00410 
00411    /* Drop translation paths if present */
00412    for (i = 0; i < 2; i++) {
00413       if (audiohook_list->in_translate[i].trans_pvt)
00414          ast_translator_free_path(audiohook_list->in_translate[i].trans_pvt);
00415       if (audiohook_list->out_translate[i].trans_pvt)
00416          ast_translator_free_path(audiohook_list->out_translate[i].trans_pvt);
00417    }
00418    
00419    /* Free ourselves */
00420    ast_free(audiohook_list);
00421 
00422    return 0;
00423 }

int ast_audiohook_detach_source ( struct ast_channel chan,
const char *  source 
)

Detach specified source audiohook from channel.

Parameters:
chan Channel to detach from
source Name of source to detach
Returns:
Returns 0 on success, -1 on failure

Definition at line 476 of file audiohook.c.

References AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_SHUTDOWN, ast_channel_lock, ast_channel_unlock, ast_channel::audiohooks, find_audiohook_by_source(), and ast_audiohook::status.

Referenced by handle_cli_mixmonitor(), and stop_mixmonitor_exec().

00477 {
00478    struct ast_audiohook *audiohook = NULL;
00479 
00480    ast_channel_lock(chan);
00481 
00482    /* Ensure the channel has audiohooks on it */
00483    if (!chan->audiohooks) {
00484       ast_channel_unlock(chan);
00485       return -1;
00486    }
00487 
00488    audiohook = find_audiohook_by_source(chan->audiohooks, source);
00489 
00490    ast_channel_unlock(chan);
00491 
00492    if (audiohook && audiohook->status != AST_AUDIOHOOK_STATUS_DONE)
00493       audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN;
00494 
00495    return (audiohook ? 0 : -1);
00496 }

int ast_audiohook_init ( struct ast_audiohook audiohook,
enum ast_audiohook_type  type,
const char *  source 
)

Initialize an audiohook structure.

Parameters:
audiohook Audiohook structure
type 
source 
Returns:
Returns 0 on success, -1 on failure

Definition at line 60 of file audiohook.c.

References AST_AUDIOHOOK_STATUS_NEW, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, ast_cond_init(), ast_mutex_init(), and ast_slinfactory_init().

Referenced by channel_spy(), enable_jack_hook(), launch_monitor_thread(), and volume_write().

00061 {
00062    /* Need to keep the type and source */
00063    audiohook->type = type;
00064    audiohook->source = source;
00065 
00066    /* Initialize lock that protects our audiohook */
00067    ast_mutex_init(&audiohook->lock);
00068    ast_cond_init(&audiohook->trigger, NULL);
00069 
00070    /* Setup the factories that are needed for this audiohook type */
00071    switch (type) {
00072    case AST_AUDIOHOOK_TYPE_SPY:
00073       ast_slinfactory_init(&audiohook->read_factory);
00074    case AST_AUDIOHOOK_TYPE_WHISPER:
00075       ast_slinfactory_init(&audiohook->write_factory);
00076       break;
00077    default:
00078       break;
00079    }
00080 
00081    /* Since we are just starting out... this audiohook is new */
00082    audiohook->status = AST_AUDIOHOOK_STATUS_NEW;
00083 
00084    return 0;
00085 }

void ast_audiohook_move_by_source ( struct ast_channel old_chan,
struct ast_channel new_chan,
const char *  source 
)

Move an audiohook from one channel to a new one.

Todo:
Currently only the first audiohook of a specific source found will be moved. We should add the capability to move multiple audiohooks from a single source as well.
Note:
It is required that both old_chan and new_chan are locked prior to calling this function. Besides needing to protect the data within the channels, not locking these channels can lead to a potential deadlock
Parameters:
old_chan The source of the audiohook to move
new_chan The destination to which we want the audiohook to move
source The source of the audiohook we want to move

Definition at line 452 of file audiohook.c.

References ast_audiohook_attach(), ast_audiohook_lock, ast_audiohook_remove(), ast_audiohook_unlock, ast_channel::audiohooks, and find_audiohook_by_source().

Referenced by audiohook_inheritance_fixup().

00453 {
00454    struct ast_audiohook *audiohook;
00455 
00456    if (!old_chan->audiohooks || !(audiohook = find_audiohook_by_source(old_chan->audiohooks, source))) {
00457       return;
00458    }
00459 
00460    /* By locking both channels and the audiohook, we can assure that
00461     * another thread will not have a chance to read the audiohook's status
00462     * as done, even though ast_audiohook_remove signals the trigger
00463     * condition
00464     */
00465    ast_audiohook_lock(audiohook);
00466    ast_audiohook_remove(old_chan, audiohook);
00467    ast_audiohook_attach(new_chan, audiohook);
00468    ast_audiohook_unlock(audiohook);
00469 }

struct ast_frame* ast_audiohook_read_frame ( struct ast_audiohook audiohook,
size_t  samples,
enum ast_audiohook_direction  direction,
int  format 
) [read]

Reads a frame in from the audiohook structure.

Parameters:
audiohook Audiohook structure
samples Number of samples wanted
direction Direction the audio frame came from
format Format of frame remote side wants back
Returns:
Returns frame on success, NULL on failure

Definition at line 295 of file audiohook.c.

References AST_AUDIOHOOK_DIRECTION_BOTH, AST_FORMAT_SLINEAR, ast_frfree, ast_translate(), ast_translator_build_path(), ast_translator_free_path(), audiohook_read_frame_both(), audiohook_read_frame_single(), ast_audiohook::format, read_frame(), and ast_audiohook::trans_pvt.

Referenced by mixmonitor_thread(), and spy_generate().

00296 {
00297    struct ast_frame *read_frame = NULL, *final_frame = NULL;
00298 
00299    if (!(read_frame = (direction == AST_AUDIOHOOK_DIRECTION_BOTH ? audiohook_read_frame_both(audiohook, samples) : audiohook_read_frame_single(audiohook, samples, direction))))
00300       return NULL;
00301 
00302    /* If they don't want signed linear back out, we'll have to send it through the translation path */
00303    if (format != AST_FORMAT_SLINEAR) {
00304       /* Rebuild translation path if different format then previously */
00305       if (audiohook->format != format) {
00306          if (audiohook->trans_pvt) {
00307             ast_translator_free_path(audiohook->trans_pvt);
00308             audiohook->trans_pvt = NULL;
00309          }
00310          /* Setup new translation path for this format... if we fail we can't very well return signed linear so free the frame and return nothing */
00311          if (!(audiohook->trans_pvt = ast_translator_build_path(format, AST_FORMAT_SLINEAR))) {
00312             ast_frfree(read_frame);
00313             return NULL;
00314          }
00315       }
00316       /* Convert to requested format, and allow the read in frame to be freed */
00317       final_frame = ast_translate(audiohook->trans_pvt, read_frame, 1);
00318    } else {
00319       final_frame = read_frame;
00320    }
00321 
00322    return final_frame;
00323 }

int ast_audiohook_remove ( struct ast_channel chan,
struct ast_audiohook audiohook 
)

Remove an audiohook from a specified channel.

Parameters:
chan Channel to remove from
audiohook Audiohook to remove
Returns:
Returns 0 on success, -1 on failure
Note:
The channel does not need to be locked before calling this function

Definition at line 508 of file audiohook.c.

References ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_TYPE_MANIPULATE, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, ast_audiohook_unlock, ast_channel_lock, ast_channel_unlock, ast_cond_signal(), AST_LIST_REMOVE, ast_channel::audiohooks, ast_audiohook::list, ast_audiohook_list::manipulate_list, ast_audiohook_list::spy_list, ast_audiohook::status, ast_audiohook::trigger, ast_audiohook::type, and ast_audiohook_list::whisper_list.

Referenced by ast_audiohook_move_by_source().

00509 {
00510    ast_channel_lock(chan);
00511 
00512    if (!chan->audiohooks) {
00513       ast_channel_unlock(chan);
00514       return -1;
00515    }
00516 
00517    if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY)
00518       AST_LIST_REMOVE(&chan->audiohooks->spy_list, audiohook, list);
00519    else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER)
00520       AST_LIST_REMOVE(&chan->audiohooks->whisper_list, audiohook, list);
00521    else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE)
00522       AST_LIST_REMOVE(&chan->audiohooks->manipulate_list, audiohook, list);
00523 
00524    ast_audiohook_lock(audiohook);
00525    audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00526    ast_cond_signal(&audiohook->trigger);
00527    ast_audiohook_unlock(audiohook);
00528 
00529    ast_channel_unlock(chan);
00530 
00531    return 0;
00532 }

void ast_audiohook_trigger_wait ( struct ast_audiohook audiohook  ) 

Wait for audiohook trigger to be triggered.

Parameters:
audiohook Audiohook to wait on

Definition at line 715 of file audiohook.c.

References ast_cond_timedwait(), ast_samp2tv(), ast_tvadd(), ast_tvnow(), ast_audiohook::lock, and ast_audiohook::trigger.

Referenced by ast_audiohook_detach(), and mixmonitor_thread().

00716 {
00717    struct timeval tv;
00718    struct timespec ts;
00719 
00720    tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000));
00721    ts.tv_sec = tv.tv_sec;
00722    ts.tv_nsec = tv.tv_usec * 1000;
00723    
00724    ast_cond_timedwait(&audiohook->trigger, &audiohook->lock, &ts);
00725    
00726    return;
00727 }

int ast_audiohook_write_frame ( struct ast_audiohook audiohook,
enum ast_audiohook_direction  direction,
struct ast_frame frame 
)

Writes a frame into the audiohook structure.

Parameters:
audiohook Audiohook structure
direction Direction the audio frame came from
frame Frame to write in
Returns:
Returns 0 on success, -1 on failure

Definition at line 121 of file audiohook.c.

References AST_AUDIOHOOK_DIRECTION_READ, AST_AUDIOHOOK_DIRECTION_WRITE, AST_AUDIOHOOK_SMALL_QUEUE, AST_AUDIOHOOK_SYNC_TOLERANCE, AST_AUDIOHOOK_TRIGGER_MODE, AST_AUDIOHOOK_TRIGGER_READ, AST_AUDIOHOOK_TRIGGER_SYNC, AST_AUDIOHOOK_TRIGGER_WRITE, ast_cond_signal(), ast_log(), ast_slinfactory_available(), ast_slinfactory_feed(), ast_slinfactory_flush(), ast_test_flag, ast_tvdiff_ms(), ast_tvnow(), LOG_DEBUG, option_debug, ast_audiohook::read_factory, ast_audiohook::read_time, ast_audiohook::trigger, ast_audiohook::write_factory, and ast_audiohook::write_time.

Referenced by audio_audiohook_write_list(), and channel_spy().

00122 {
00123    struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory);
00124    struct ast_slinfactory *other_factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->write_factory : &audiohook->read_factory);
00125    struct timeval *time = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_time : &audiohook->write_time), previous_time = *time;
00126    int our_factory_samples;
00127    int our_factory_ms;
00128    int other_factory_samples;
00129    int other_factory_ms;
00130 
00131    /* Update last feeding time to be current */
00132    *time = ast_tvnow();
00133 
00134    our_factory_samples = ast_slinfactory_available(factory);
00135    our_factory_ms = ast_tvdiff_ms(*time, previous_time) + (our_factory_samples / 8);
00136    other_factory_samples = ast_slinfactory_available(other_factory);
00137    other_factory_ms = other_factory_samples / 8;
00138 
00139    if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC) && other_factory_samples && (our_factory_ms - other_factory_ms > AST_AUDIOHOOK_SYNC_TOLERANCE)) {
00140       if (option_debug)
00141          ast_log(LOG_DEBUG, "Flushing audiohook %p so it remains in sync\n", audiohook);
00142       ast_slinfactory_flush(factory);
00143       ast_slinfactory_flush(other_factory);
00144    }
00145 
00146    if (ast_test_flag(audiohook, AST_AUDIOHOOK_SMALL_QUEUE) && (our_factory_samples > 640 || other_factory_samples > 640)) {
00147       if (option_debug) {
00148          ast_log(LOG_DEBUG, "Audiohook %p has stale audio in its factories. Flushing them both\n", audiohook);
00149       }
00150       ast_slinfactory_flush(factory);
00151       ast_slinfactory_flush(other_factory);
00152    }
00153 
00154    /* Write frame out to respective factory */
00155    ast_slinfactory_feed(factory, frame);
00156 
00157    /* If we need to notify the respective handler of this audiohook, do so */
00158    if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_READ) && (direction == AST_AUDIOHOOK_DIRECTION_READ)) {
00159       ast_cond_signal(&audiohook->trigger);
00160    } else if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_WRITE) && (direction == AST_AUDIOHOOK_DIRECTION_WRITE)) {
00161       ast_cond_signal(&audiohook->trigger);
00162    } else if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC)) {
00163       ast_cond_signal(&audiohook->trigger);
00164    }
00165 
00166    return 0;
00167 }

struct ast_frame* ast_audiohook_write_list ( struct ast_channel chan,
struct ast_audiohook_list audiohook_list,
enum ast_audiohook_direction  direction,
struct ast_frame frame 
) [read]

Pass a frame off to be handled by the audiohook core.

Parameters:
chan Channel that the list is coming off of
audiohook_list List of audiohooks
direction Direction frame is coming in from
frame The frame itself
Returns:
Return frame on success, NULL on failure

Definition at line 700 of file audiohook.c.

References AST_FRAME_DTMF, AST_FRAME_VOICE, audio_audiohook_write_list(), dtmf_audiohook_write_list(), and ast_frame::frametype.

Referenced by __ast_read(), and ast_write().

00701 {
00702    /* Pass off frame to it's respective list write function */
00703    if (frame->frametype == AST_FRAME_VOICE)
00704       return audio_audiohook_write_list(chan, audiohook_list, direction, frame);
00705    else if (frame->frametype == AST_FRAME_DTMF)
00706       return dtmf_audiohook_write_list(chan, audiohook_list, direction, frame);
00707    else
00708       return frame;
00709 }

int ast_channel_audiohook_count_by_source ( struct ast_channel chan,
const char *  source,
enum ast_audiohook_type  type 
)

Find out how many audiohooks from a certain source exist on a given channel, regardless of status.

Parameters:
chan The channel on which to find the spies
source The audiohook's source
type The type of audiohook
Returns:
Return the number of audiohooks which are from the source specified
Note: Function performs nlocking.

Definition at line 730 of file audiohook.c.

References AST_AUDIOHOOK_TYPE_MANIPULATE, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_log(), ast_channel::audiohooks, ast_audiohook::list, LOG_DEBUG, ast_audiohook_list::manipulate_list, ast_audiohook::source, ast_audiohook_list::spy_list, and ast_audiohook_list::whisper_list.

Referenced by builtin_automixmonitor().

00731 {
00732    int count = 0;
00733    struct ast_audiohook *ah = NULL;
00734 
00735    if (!chan->audiohooks)
00736       return -1;
00737 
00738    switch (type) {
00739       case AST_AUDIOHOOK_TYPE_SPY:
00740          AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->spy_list, ah, list) {
00741             if (!strcmp(ah->source, source)) {
00742                count++;
00743             }
00744          }
00745          AST_LIST_TRAVERSE_SAFE_END;
00746          break;
00747       case AST_AUDIOHOOK_TYPE_WHISPER:
00748          AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->whisper_list, ah, list) {
00749             if (!strcmp(ah->source, source)) {
00750                count++;
00751             }
00752          }
00753          AST_LIST_TRAVERSE_SAFE_END;
00754          break;
00755       case AST_AUDIOHOOK_TYPE_MANIPULATE:
00756          AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->manipulate_list, ah, list) {
00757             if (!strcmp(ah->source, source)) {
00758                count++;
00759             }
00760          }
00761          AST_LIST_TRAVERSE_SAFE_END;
00762          break;
00763       default:
00764          ast_log(LOG_DEBUG, "Invalid audiohook type supplied, (%d)\n", type);
00765          return -1;
00766    }
00767 
00768    return count;
00769 }

int ast_channel_audiohook_count_by_source_running ( struct ast_channel chan,
const char *  source,
enum ast_audiohook_type  type 
)

Find out how many spies of a certain type exist on a given channel, and are in state running.

Parameters:
chan The channel on which to find the spies
source The source of the audiohook
type The type of spy to look for
Returns:
Return the number of running audiohooks which are from the source specified
Note: Function performs no locking.

Definition at line 772 of file audiohook.c.

References AST_AUDIOHOOK_STATUS_RUNNING, AST_AUDIOHOOK_TYPE_MANIPULATE, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_log(), ast_channel::audiohooks, ast_audiohook::list, LOG_DEBUG, ast_audiohook_list::manipulate_list, ast_audiohook::source, ast_audiohook_list::spy_list, ast_audiohook::status, and ast_audiohook_list::whisper_list.

Referenced by builtin_automixmonitor().

00773 {
00774    int count = 0;
00775    struct ast_audiohook *ah = NULL;
00776    if (!chan->audiohooks)
00777       return -1;
00778 
00779    switch (type) {
00780       case AST_AUDIOHOOK_TYPE_SPY:
00781          AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->spy_list, ah, list) {
00782             if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING))
00783                count++;
00784          }
00785          AST_LIST_TRAVERSE_SAFE_END;
00786          break;
00787       case AST_AUDIOHOOK_TYPE_WHISPER:
00788          AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->whisper_list, ah, list) {
00789             if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING))
00790                count++;
00791          }
00792          AST_LIST_TRAVERSE_SAFE_END;
00793          break;
00794       case AST_AUDIOHOOK_TYPE_MANIPULATE:
00795          AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->manipulate_list, ah, list) {
00796             if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING))
00797                count++;
00798          }
00799          AST_LIST_TRAVERSE_SAFE_END;
00800          break;
00801       default:
00802          ast_log(LOG_DEBUG, "Invalid audiohook type supplied, (%d)\n", type);
00803          return -1;
00804    }
00805    return count;
00806 }

static struct ast_frame* audio_audiohook_write_list ( struct ast_channel chan,
struct ast_audiohook_list audiohook_list,
enum ast_audiohook_direction  direction,
struct ast_frame frame 
) [static, read]

Pass an AUDIO frame off to be handled by the audiohook core.

Parameters:
chan Channel that the list is coming off of
audiohook_list List of audiohooks
direction Direction frame is coming in from
frame The frame itself
Returns:
Return frame on success, NULL on failure

Definition at line 570 of file audiohook.c.

References AST_AUDIOHOOK_DIRECTION_READ, AST_AUDIOHOOK_DIRECTION_WRITE, ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_RUNNING, ast_audiohook_unlock, ast_audiohook_write_frame(), ast_cond_signal(), AST_FORMAT_SLINEAR, ast_frfree, AST_LIST_EMPTY, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_slinear_saturated_add(), ast_slinfactory_available(), ast_slinfactory_read(), ast_translate(), ast_translator_build_path(), ast_translator_free_path(), ast_audiohook_translate::format, ast_audiohook_list::in_translate, ast_audiohook::list, ast_audiohook::manipulate_callback, ast_audiohook_list::manipulate_list, ast_audiohook_list::out_translate, ast_frame::samples, ast_audiohook_list::spy_list, ast_audiohook::status, ast_frame::subclass, ast_audiohook_translate::trans_pvt, ast_audiohook::trigger, ast_audiohook_list::whisper_list, and ast_audiohook::write_factory.

Referenced by ast_audiohook_write_list().

00571 {
00572    struct ast_audiohook_translate *in_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->in_translate[0] : &audiohook_list->in_translate[1]);
00573    struct ast_audiohook_translate *out_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->out_translate[0] : &audiohook_list->out_translate[1]);
00574    struct ast_frame *start_frame = frame, *middle_frame = frame, *end_frame = frame;
00575    struct ast_audiohook *audiohook = NULL;
00576    int samples = frame->samples;
00577 
00578    /* If the frame coming in is not signed linear we have to send it through the in_translate path */
00579    if (frame->subclass != AST_FORMAT_SLINEAR) {
00580       if (in_translate->format != frame->subclass) {
00581          if (in_translate->trans_pvt)
00582             ast_translator_free_path(in_translate->trans_pvt);
00583          if (!(in_translate->trans_pvt = ast_translator_build_path(AST_FORMAT_SLINEAR, frame->subclass)))
00584             return frame;
00585          in_translate->format = frame->subclass;
00586       }
00587       if (!(middle_frame = ast_translate(in_translate->trans_pvt, frame, 0)))
00588          return frame;
00589       samples = middle_frame->samples;
00590    }
00591 
00592    /* Queue up signed linear frame to each spy */
00593    AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) {
00594       ast_audiohook_lock(audiohook);
00595       if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00596          AST_LIST_REMOVE_CURRENT(list);
00597          audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00598          ast_cond_signal(&audiohook->trigger);
00599          ast_audiohook_unlock(audiohook);
00600          continue;
00601       }
00602       ast_audiohook_write_frame(audiohook, direction, middle_frame);
00603       ast_audiohook_unlock(audiohook);
00604    }
00605    AST_LIST_TRAVERSE_SAFE_END
00606 
00607    /* If this frame is being written out to the channel then we need to use whisper sources */
00608    if (direction == AST_AUDIOHOOK_DIRECTION_WRITE && !AST_LIST_EMPTY(&audiohook_list->whisper_list)) {
00609       int i = 0;
00610       short read_buf[samples], combine_buf[samples], *data1 = NULL, *data2 = NULL;
00611       memset(&combine_buf, 0, sizeof(combine_buf));
00612       AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) {
00613          ast_audiohook_lock(audiohook);
00614          if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00615             AST_LIST_REMOVE_CURRENT(list);
00616             audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00617             ast_cond_signal(&audiohook->trigger);
00618             ast_audiohook_unlock(audiohook);
00619             continue;
00620          }
00621          if (ast_slinfactory_available(&audiohook->write_factory) >= samples && ast_slinfactory_read(&audiohook->write_factory, read_buf, samples)) {
00622             /* Take audio from this whisper source and combine it into our main buffer */
00623             for (i = 0, data1 = combine_buf, data2 = read_buf; i < samples; i++, data1++, data2++)
00624                ast_slinear_saturated_add(data1, data2);
00625          }
00626          ast_audiohook_unlock(audiohook);
00627       }
00628       AST_LIST_TRAVERSE_SAFE_END
00629       /* We take all of the combined whisper sources and combine them into the audio being written out */
00630       for (i = 0, data1 = middle_frame->data, data2 = combine_buf; i < samples; i++, data1++, data2++)
00631          ast_slinear_saturated_add(data1, data2);
00632       end_frame = middle_frame;
00633    }
00634 
00635    /* Pass off frame to manipulate audiohooks */
00636    if (!AST_LIST_EMPTY(&audiohook_list->manipulate_list)) {
00637       AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
00638          ast_audiohook_lock(audiohook);
00639          if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00640             AST_LIST_REMOVE_CURRENT(list);
00641             audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00642             ast_audiohook_unlock(audiohook);
00643             /* We basically drop all of our links to the manipulate audiohook and prod it to do it's own destructive things */
00644             audiohook->manipulate_callback(audiohook, chan, NULL, direction);
00645             continue;
00646          }
00647          /* Feed in frame to manipulation */
00648          if (audiohook->manipulate_callback(audiohook, chan, middle_frame, direction)) {
00649             ast_frfree(middle_frame);
00650             middle_frame = NULL;
00651          }
00652          ast_audiohook_unlock(audiohook);
00653       }
00654       AST_LIST_TRAVERSE_SAFE_END
00655       if (middle_frame) {
00656          end_frame = middle_frame;
00657       }
00658    }
00659 
00660    /* Now we figure out what to do with our end frame (whether to transcode or not) */
00661    if (middle_frame == end_frame) {
00662       /* Middle frame was modified and became the end frame... let's see if we need to transcode */
00663       if (end_frame->subclass != start_frame->subclass) {
00664          if (out_translate->format != start_frame->subclass) {
00665             if (out_translate->trans_pvt)
00666                ast_translator_free_path(out_translate->trans_pvt);
00667             if (!(out_translate->trans_pvt = ast_translator_build_path(start_frame->subclass, AST_FORMAT_SLINEAR))) {
00668                /* We can't transcode this... drop our middle frame and return the original */
00669                ast_frfree(middle_frame);
00670                return start_frame;
00671             }
00672             out_translate->format = start_frame->subclass;
00673          }
00674          /* Transcode from our middle (signed linear) frame to new format of the frame that came in */
00675          if (!(end_frame = ast_translate(out_translate->trans_pvt, middle_frame, 0))) {
00676             /* Failed to transcode the frame... drop it and return the original */
00677             ast_frfree(middle_frame);
00678             return start_frame;
00679          }
00680          /* Here's the scoop... middle frame is no longer of use to us */
00681          ast_frfree(middle_frame);
00682       }
00683    } else {
00684       /* No frame was modified, we can just drop our middle frame and pass the frame we got in out */
00685       if (middle_frame) {
00686          ast_frfree(middle_frame);
00687       }
00688    }
00689 
00690    return end_frame;
00691 }

static struct ast_frame* audiohook_read_frame_both ( struct ast_audiohook audiohook,
size_t  samples 
) [static, read]

Definition at line 197 of file audiohook.c.

References ast_debug, AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_frdup(), ast_log(), ast_slinear_saturated_add(), ast_slinear_saturated_divide(), ast_slinear_saturated_multiply(), ast_slinfactory_available(), ast_slinfactory_read(), ast_tvdiff_ms(), ast_tvnow(), ast_frame::data, ast_frame::frametype, LOG_DEBUG, option_debug, ast_audiohook::options, ast_audiohook::read_factory, ast_audiohook::read_time, ast_audiohook_options::read_volume, ast_audiohook::write_factory, ast_audiohook::write_time, and ast_audiohook_options::write_volume.

Referenced by ast_audiohook_read_frame().

00198 {
00199    int i = 0, usable_read, usable_write;
00200    short buf1[samples], buf2[samples], *read_buf = NULL, *write_buf = NULL, *final_buf = NULL, *data1 = NULL, *data2 = NULL;
00201    struct ast_frame frame = {
00202       .frametype = AST_FRAME_VOICE,
00203       .subclass = AST_FORMAT_SLINEAR,
00204       .data = NULL,
00205       .datalen = sizeof(buf1),
00206       .samples = samples,
00207    };
00208 
00209    /* Make sure both factories have the required samples */
00210    usable_read = (ast_slinfactory_available(&audiohook->read_factory) >= samples ? 1 : 0);
00211    usable_write = (ast_slinfactory_available(&audiohook->write_factory) >= samples ? 1 : 0);
00212 
00213    if (!usable_read && !usable_write) {
00214       /* If both factories are unusable bail out */
00215       ast_debug(1, "Read factory %p and write factory %p both fail to provide %zd samples\n", &audiohook->read_factory, &audiohook->write_factory, samples);
00216       return NULL;
00217    }
00218 
00219    /* If we want to provide only a read factory make sure we aren't waiting for other audio */
00220    if (usable_read && !usable_write && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) {
00221       ast_debug(3, "Write factory %p was pretty quick last time, waiting for them.\n", &audiohook->write_factory);
00222       return NULL;
00223    }
00224 
00225    /* If we want to provide only a write factory make sure we aren't waiting for other audio */
00226    if (usable_write && !usable_read && (ast_tvdiff_ms(ast_tvnow(), audiohook->read_time) < (samples/8)*2)) {
00227       ast_debug(3, "Read factory %p was pretty quick last time, waiting for them.\n", &audiohook->read_factory);
00228       return NULL;
00229    }
00230 
00231    /* Start with the read factory... if there are enough samples, read them in */
00232    if (usable_read) {
00233       if (ast_slinfactory_read(&audiohook->read_factory, buf1, samples)) {
00234          read_buf = buf1;
00235          /* Adjust read volume if need be */
00236          if (audiohook->options.read_volume) {
00237             int count = 0;
00238             short adjust_value = abs(audiohook->options.read_volume);
00239             for (count = 0; count < samples; count++) {
00240                if (audiohook->options.read_volume > 0)
00241                   ast_slinear_saturated_multiply(&buf1[count], &adjust_value);
00242                else if (audiohook->options.read_volume < 0)
00243                   ast_slinear_saturated_divide(&buf1[count], &adjust_value);
00244             }
00245          }
00246       }
00247    } else if (option_debug)
00248       ast_log(LOG_DEBUG, "Failed to get %d samples from read factory %p\n", (int)samples, &audiohook->read_factory);
00249 
00250    /* Move on to the write factory... if there are enough samples, read them in */
00251    if (usable_write) {
00252       if (ast_slinfactory_read(&audiohook->write_factory, buf2, samples)) {
00253          write_buf = buf2;
00254          /* Adjust write volume if need be */
00255          if (audiohook->options.write_volume) {
00256             int count = 0;
00257             short adjust_value = abs(audiohook->options.write_volume);
00258             for (count = 0; count < samples; count++) {
00259                if (audiohook->options.write_volume > 0)
00260                   ast_slinear_saturated_multiply(&buf2[count], &adjust_value);
00261                else if (audiohook->options.write_volume < 0)
00262                   ast_slinear_saturated_divide(&buf2[count], &adjust_value);
00263             }
00264          }
00265       }
00266    } else if (option_debug)
00267       ast_log(LOG_DEBUG, "Failed to get %d samples from write factory %p\n", (int)samples, &audiohook->write_factory);
00268 
00269    /* Basically we figure out which buffer to use... and if mixing can be done here */
00270    if (!read_buf && !write_buf)
00271       return NULL;
00272    else if (read_buf && write_buf) {
00273       for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++)
00274          ast_slinear_saturated_add(data1, data2);
00275       final_buf = buf1;
00276    } else if (read_buf)
00277       final_buf = buf1;
00278    else if (write_buf)
00279       final_buf = buf2;
00280 
00281    /* Make the final buffer part of the frame, so it gets duplicated fine */
00282    frame.data = final_buf;
00283 
00284    /* Yahoo, a combined copy of the audio! */
00285    return ast_frdup(&frame);
00286 }

static struct ast_frame* audiohook_read_frame_single ( struct ast_audiohook audiohook,
size_t  samples,
enum ast_audiohook_direction  direction 
) [static, read]

Definition at line 169 of file audiohook.c.

References AST_AUDIOHOOK_DIRECTION_READ, AST_FORMAT_SLINEAR, ast_frame_adjust_volume(), AST_FRAME_VOICE, ast_frdup(), ast_slinfactory_available(), ast_slinfactory_read(), buf, ast_frame::frametype, ast_audiohook::options, ast_audiohook::read_factory, ast_audiohook_options::read_volume, ast_audiohook::write_factory, and ast_audiohook_options::write_volume.

Referenced by ast_audiohook_read_frame().

00170 {
00171    struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory);
00172    int vol = (direction == AST_AUDIOHOOK_DIRECTION_READ ? audiohook->options.read_volume : audiohook->options.write_volume);
00173    short buf[samples];
00174    struct ast_frame frame = {
00175       .frametype = AST_FRAME_VOICE,
00176       .subclass = AST_FORMAT_SLINEAR,
00177       .data = buf,
00178       .datalen = sizeof(buf),
00179       .samples = samples,
00180    };
00181 
00182    /* Ensure the factory is able to give us the samples we want */
00183    if (samples > ast_slinfactory_available(factory))
00184       return NULL;
00185    
00186    /* Read data in from factory */
00187    if (!ast_slinfactory_read(factory, buf, samples))
00188       return NULL;
00189 
00190    /* If a volume adjustment needs to be applied apply it */
00191    if (vol)
00192       ast_frame_adjust_volume(&frame, vol);
00193 
00194    return ast_frdup(&frame);
00195 }

static struct ast_frame* dtmf_audiohook_write_list ( struct ast_channel chan,
struct ast_audiohook_list audiohook_list,
enum ast_audiohook_direction  direction,
struct ast_frame frame 
) [static, read]

Pass a DTMF frame off to be handled by the audiohook core.

Parameters:
chan Channel that the list is coming off of
audiohook_list List of audiohooks
direction Direction frame is coming in from
frame The frame itself
Returns:
Return frame on success, NULL on failure

Definition at line 541 of file audiohook.c.

References ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_RUNNING, ast_audiohook_unlock, AST_AUDIOHOOK_WANTS_DTMF, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_test_flag, ast_audiohook::list, ast_audiohook::manipulate_callback, ast_audiohook_list::manipulate_list, and ast_audiohook::status.

Referenced by ast_audiohook_write_list().

00542 {
00543    struct ast_audiohook *audiohook = NULL;
00544 
00545    AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
00546       ast_audiohook_lock(audiohook);
00547       if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
00548          AST_LIST_REMOVE_CURRENT(list);
00549          audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
00550          ast_audiohook_unlock(audiohook);
00551          audiohook->manipulate_callback(audiohook, NULL, NULL, 0);
00552          continue;
00553       }
00554       if (ast_test_flag(audiohook, AST_AUDIOHOOK_WANTS_DTMF))
00555          audiohook->manipulate_callback(audiohook, chan, frame, direction);
00556       ast_audiohook_unlock(audiohook);
00557    }
00558    AST_LIST_TRAVERSE_SAFE_END;
00559 
00560    return frame;
00561 }

static struct ast_audiohook* find_audiohook_by_source ( struct ast_audiohook_list audiohook_list,
const char *  source 
) [static, read]

find an audiohook based on its source

Parameters:
audiohook_list The list of audiohooks to search in
source The source of the audiohook we wish to find
Returns:
Return the corresponding audiohook or NULL if it cannot be found.

Definition at line 430 of file audiohook.c.

References AST_LIST_TRAVERSE, ast_audiohook::list, ast_audiohook_list::manipulate_list, ast_audiohook::source, ast_audiohook_list::spy_list, and ast_audiohook_list::whisper_list.

Referenced by ast_audiohook_detach_source(), and ast_audiohook_move_by_source().

00431 {
00432    struct ast_audiohook *audiohook = NULL;
00433 
00434    AST_LIST_TRAVERSE(&audiohook_list->spy_list, audiohook, list) {
00435       if (!strcasecmp(audiohook->source, source))
00436          return audiohook;
00437    }
00438 
00439    AST_LIST_TRAVERSE(&audiohook_list->whisper_list, audiohook, list) {
00440       if (!strcasecmp(audiohook->source, source))
00441          return audiohook;
00442    }
00443 
00444    AST_LIST_TRAVERSE(&audiohook_list->manipulate_list, audiohook, list) {
00445       if (!strcasecmp(audiohook->source, source))
00446          return audiohook;
00447    }
00448 
00449    return NULL;
00450 }


Generated on Wed Oct 28 11:45:50 2009 for Asterisk - the Open Source PBX by  doxygen 1.5.6