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"
Go to the source code of this file.
Data Structures | |
struct | ast_audiohook_list |
struct | ast_audiohook_translate |
struct | audiohook_volume |
Audiohook volume adjustment structure. More... | |
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_frame * | ast_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. | |
void | ast_audiohook_update_status (struct ast_audiohook *audiohook, enum ast_audiohook_status status) |
Update audiohook's status. | |
int | ast_audiohook_volume_adjust (struct ast_channel *chan, enum ast_audiohook_direction direction, int volume) |
Adjust the volume on frames read from or written to a channel. | |
int | ast_audiohook_volume_get (struct ast_channel *chan, enum ast_audiohook_direction direction) |
Retrieve the volume adjustment value on frames read from or written to a channel. | |
int | ast_audiohook_volume_set (struct ast_channel *chan, enum ast_audiohook_direction direction, int volume) |
Adjust the volume on frames read from or written to a channel. | |
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_frame * | ast_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_audiohook_write_list_empty (struct ast_audiohook_list *audiohook_list) |
determines if a audiohook_list is empty or not. | |
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_frame * | audio_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_frame * | audiohook_read_frame_both (struct ast_audiohook *audiohook, size_t samples) |
static struct ast_frame * | audiohook_read_frame_single (struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction) |
static int | audiohook_volume_callback (struct ast_audiohook *audiohook, struct ast_channel *chan, struct ast_frame *frame, enum ast_audiohook_direction direction) |
Helper function which actually gets called by audiohooks to perform the adjustment. | |
static void | audiohook_volume_destroy (void *data) |
Callback used to destroy the audiohook volume datastore. | |
static struct audiohook_volume * | audiohook_volume_get (struct ast_channel *chan, int create) |
Helper function which finds and optionally creates an audiohook_volume_datastore datastore on a channel. | |
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) |
Pass a DTMF frame off to be handled by the audiohook core. | |
static struct ast_audiohook * | find_audiohook_by_source (struct ast_audiohook_list *audiohook_list, const char *source) |
find an audiohook based on its source | |
Variables | |
static struct ast_datastore_info | audiohook_volume_datastore |
Datastore used to store audiohook volume information. |
Audiohooks Architecture.
Definition in file audiohook.c.
int ast_audiohook_attach | ( | struct ast_channel * | chan, |
struct ast_audiohook * | audiohook | ||
) |
Attach audiohook to channel.
chan | Channel |
audiohook | Audiohook structure |
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_audiohook_update_status(), 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::type, and ast_audiohook_list::whisper_list.
Referenced by ast_audiohook_move_by_source(), audiohook_volume_get(), enable_jack_hook(), speex_write(), start_spying(), startmon(), and volume_write().
{ ast_channel_lock(chan); if (!chan->audiohooks) { /* Whoops... allocate a new structure */ if (!(chan->audiohooks = ast_calloc(1, sizeof(*chan->audiohooks)))) { ast_channel_unlock(chan); return -1; } AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->spy_list); AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->whisper_list); AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->manipulate_list); } /* Drop into respective list */ if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY) AST_LIST_INSERT_TAIL(&chan->audiohooks->spy_list, audiohook, list); else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER) AST_LIST_INSERT_TAIL(&chan->audiohooks->whisper_list, audiohook, list); else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE) AST_LIST_INSERT_TAIL(&chan->audiohooks->manipulate_list, audiohook, list); /* Change status over to running since it is now attached */ ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_RUNNING); ast_channel_unlock(chan); return 0; }
int ast_audiohook_destroy | ( | struct ast_audiohook * | audiohook | ) |
Destroys an audiohook structure.
audiohook | Audiohook structure |
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 audiohook_volume_destroy(), channel_spy(), destroy_callback(), destroy_jack_data(), destroy_monitor_audiohook(), and launch_monitor_thread().
{ /* Drop the factories used by this audiohook type */ switch (audiohook->type) { case AST_AUDIOHOOK_TYPE_SPY: ast_slinfactory_destroy(&audiohook->read_factory); case AST_AUDIOHOOK_TYPE_WHISPER: ast_slinfactory_destroy(&audiohook->write_factory); break; default: break; } /* Destroy translation path if present */ if (audiohook->trans_pvt) ast_translator_free_path(audiohook->trans_pvt); /* Lock and trigger be gone! */ ast_cond_destroy(&audiohook->trigger); ast_mutex_destroy(&audiohook->lock); return 0; }
int ast_audiohook_detach | ( | struct ast_audiohook * | audiohook | ) |
Detach audiohook from channel.
audiohook | Audiohook structure |
Definition at line 383 of file audiohook.c.
References AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_NEW, AST_AUDIOHOOK_STATUS_SHUTDOWN, ast_audiohook_trigger_wait(), ast_audiohook_update_status(), and ast_audiohook::status.
Referenced by channel_spy(), destroy_monitor_audiohook(), disable_jack_hook(), and speex_write().
{ if (audiohook->status == AST_AUDIOHOOK_STATUS_NEW || audiohook->status == AST_AUDIOHOOK_STATUS_DONE) return 0; ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_SHUTDOWN); while (audiohook->status != AST_AUDIOHOOK_STATUS_DONE) ast_audiohook_trigger_wait(audiohook); return 0; }
int ast_audiohook_detach_list | ( | struct ast_audiohook_list * | audiohook_list | ) |
Detach audiohooks from list and destroy said list.
audiohook_list | List of audiohooks |
Definition at line 400 of file audiohook.c.
References AST_AUDIOHOOK_STATUS_DONE, ast_audiohook_update_status(), 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_translate::trans_pvt, and ast_audiohook_list::whisper_list.
Referenced by __ast_read(), ast_hangup(), and ast_write().
{ int i = 0; struct ast_audiohook *audiohook = NULL; /* Drop any spies */ while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->spy_list, list))) { ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); } /* Drop any whispering sources */ while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->whisper_list, list))) { ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); } /* Drop any manipulaters */ while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->manipulate_list, list))) { ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); audiohook->manipulate_callback(audiohook, NULL, NULL, 0); } /* Drop translation paths if present */ for (i = 0; i < 2; i++) { if (audiohook_list->in_translate[i].trans_pvt) ast_translator_free_path(audiohook_list->in_translate[i].trans_pvt); if (audiohook_list->out_translate[i].trans_pvt) ast_translator_free_path(audiohook_list->out_translate[i].trans_pvt); } /* Free ourselves */ ast_free(audiohook_list); return 0; }
int ast_audiohook_detach_source | ( | struct ast_channel * | chan, |
const char * | source | ||
) |
Detach specified source audiohook from channel.
chan | Channel to detach from |
source | Name of source to detach |
Definition at line 491 of file audiohook.c.
References AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_SHUTDOWN, ast_audiohook_update_status(), 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().
{ struct ast_audiohook *audiohook = NULL; ast_channel_lock(chan); /* Ensure the channel has audiohooks on it */ if (!chan->audiohooks) { ast_channel_unlock(chan); return -1; } audiohook = find_audiohook_by_source(chan->audiohooks, source); ast_channel_unlock(chan); if (audiohook && audiohook->status != AST_AUDIOHOOK_STATUS_DONE) ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_SHUTDOWN); return (audiohook ? 0 : -1); }
int ast_audiohook_init | ( | struct ast_audiohook * | audiohook, |
enum ast_audiohook_type | type, | ||
const char * | source | ||
) |
Initialize an audiohook structure.
audiohook | Audiohook structure |
type | |
source |
Definition at line 60 of file audiohook.c.
References AST_AUDIOHOOK_STATUS_NEW, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, ast_audiohook_update_status(), ast_cond_init(), ast_mutex_init(), ast_slinfactory_init(), and type.
Referenced by audiohook_volume_get(), channel_spy(), enable_jack_hook(), launch_monitor_thread(), speex_write(), and volume_write().
{ /* Need to keep the type and source */ audiohook->type = type; audiohook->source = source; /* Initialize lock that protects our audiohook */ ast_mutex_init(&audiohook->lock); ast_cond_init(&audiohook->trigger, NULL); /* Setup the factories that are needed for this audiohook type */ switch (type) { case AST_AUDIOHOOK_TYPE_SPY: ast_slinfactory_init(&audiohook->read_factory); case AST_AUDIOHOOK_TYPE_WHISPER: ast_slinfactory_init(&audiohook->write_factory); break; default: break; } /* Since we are just starting out... this audiohook is new */ ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_NEW); return 0; }
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.
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 462 of file audiohook.c.
References ast_audiohook_attach(), ast_audiohook_lock, ast_audiohook_remove(), ast_audiohook_unlock, ast_channel::audiohooks, find_audiohook_by_source(), and ast_audiohook::status.
Referenced by audiohook_inheritance_fixup().
{ struct ast_audiohook *audiohook; enum ast_audiohook_status oldstatus; if (!old_chan->audiohooks || !(audiohook = find_audiohook_by_source(old_chan->audiohooks, source))) { return; } /* By locking both channels and the audiohook, we can assure that * another thread will not have a chance to read the audiohook's status * as done, even though ast_audiohook_remove signals the trigger * condition. */ ast_audiohook_lock(audiohook); oldstatus = audiohook->status; ast_audiohook_remove(old_chan, audiohook); ast_audiohook_attach(new_chan, audiohook); audiohook->status = oldstatus; ast_audiohook_unlock(audiohook); }
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.
audiohook | Audiohook structure |
samples | Number of samples wanted |
direction | Direction the audio frame came from |
format | Format of frame remote side wants back |
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().
{ struct ast_frame *read_frame = NULL, *final_frame = NULL; if (!(read_frame = (direction == AST_AUDIOHOOK_DIRECTION_BOTH ? audiohook_read_frame_both(audiohook, samples) : audiohook_read_frame_single(audiohook, samples, direction)))) return NULL; /* If they don't want signed linear back out, we'll have to send it through the translation path */ if (format != AST_FORMAT_SLINEAR) { /* Rebuild translation path if different format then previously */ if (audiohook->format != format) { if (audiohook->trans_pvt) { ast_translator_free_path(audiohook->trans_pvt); audiohook->trans_pvt = NULL; } /* 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 */ if (!(audiohook->trans_pvt = ast_translator_build_path(format, AST_FORMAT_SLINEAR))) { ast_frfree(read_frame); return NULL; } } /* Convert to requested format, and allow the read in frame to be freed */ final_frame = ast_translate(audiohook->trans_pvt, read_frame, 1); } else { final_frame = read_frame; } return final_frame; }
int ast_audiohook_remove | ( | struct ast_channel * | chan, |
struct ast_audiohook * | audiohook | ||
) |
Remove an audiohook from a specified channel.
chan | Channel to remove from |
audiohook | Audiohook to remove |
Definition at line 523 of file audiohook.c.
References AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_TYPE_MANIPULATE, AST_AUDIOHOOK_TYPE_SPY, AST_AUDIOHOOK_TYPE_WHISPER, ast_audiohook_update_status(), ast_channel_lock, ast_channel_unlock, AST_LIST_REMOVE, ast_channel::audiohooks, ast_audiohook::list, ast_audiohook_list::manipulate_list, ast_audiohook_list::spy_list, ast_audiohook::type, and ast_audiohook_list::whisper_list.
Referenced by ast_audiohook_move_by_source(), and speex_write().
{ ast_channel_lock(chan); if (!chan->audiohooks) { ast_channel_unlock(chan); return -1; } if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY) AST_LIST_REMOVE(&chan->audiohooks->spy_list, audiohook, list); else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER) AST_LIST_REMOVE(&chan->audiohooks->whisper_list, audiohook, list); else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE) AST_LIST_REMOVE(&chan->audiohooks->manipulate_list, audiohook, list); ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); ast_channel_unlock(chan); return 0; }
void ast_audiohook_trigger_wait | ( | struct ast_audiohook * | audiohook | ) |
Wait for audiohook trigger to be triggered.
audiohook | Audiohook to wait on |
Definition at line 758 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().
{ struct timeval wait; struct timespec ts; wait = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000)); ts.tv_sec = wait.tv_sec; ts.tv_nsec = wait.tv_usec * 1000; ast_cond_timedwait(&audiohook->trigger, &audiohook->lock, &ts); return; }
void ast_audiohook_update_status | ( | struct ast_audiohook * | audiohook, |
enum ast_audiohook_status | status | ||
) |
Update audiohook's status.
audiohook | status enum |
audiohook | Audiohook structure |
Definition at line 369 of file audiohook.c.
References ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, ast_audiohook_unlock, ast_cond_signal(), status, ast_audiohook::status, and ast_audiohook::trigger.
Referenced by ast_audiohook_attach(), ast_audiohook_detach(), ast_audiohook_detach_list(), ast_audiohook_detach_source(), ast_audiohook_init(), ast_audiohook_remove(), audio_audiohook_write_list(), and dtmf_audiohook_write_list().
{ ast_audiohook_lock(audiohook); if (audiohook->status != AST_AUDIOHOOK_STATUS_DONE) { audiohook->status = status; ast_cond_signal(&audiohook->trigger); } ast_audiohook_unlock(audiohook); }
int ast_audiohook_volume_adjust | ( | struct ast_channel * | chan, |
enum ast_audiohook_direction | direction, | ||
int | volume | ||
) |
Adjust the volume on frames read from or written to a channel.
chan | Channel to muck with |
direction | Direction to increase |
volume | Value to adjust the adjustment by |
Definition at line 1018 of file audiohook.c.
References AST_AUDIOHOOK_DIRECTION_BOTH, AST_AUDIOHOOK_DIRECTION_READ, AST_AUDIOHOOK_DIRECTION_WRITE, audiohook_volume_get(), audiohook_volume::read_adjustment, and audiohook_volume::write_adjustment.
Referenced by menu_callback().
{ struct audiohook_volume *audiohook_volume = NULL; /* Attempt to find the audiohook volume information, and create an audiohook if none exists */ if (!(audiohook_volume = audiohook_volume_get(chan, 1))) { return -1; } /* Based on the direction change the specific adjustment value */ if (direction == AST_AUDIOHOOK_DIRECTION_READ || direction == AST_AUDIOHOOK_DIRECTION_BOTH) { audiohook_volume->read_adjustment += volume; } if (direction == AST_AUDIOHOOK_DIRECTION_WRITE || direction == AST_AUDIOHOOK_DIRECTION_BOTH) { audiohook_volume->write_adjustment += volume; } return 0; }
int ast_audiohook_volume_get | ( | struct ast_channel * | chan, |
enum ast_audiohook_direction | direction | ||
) |
Retrieve the volume adjustment value on frames read from or written to a channel.
chan | Channel to retrieve volume adjustment from |
direction | Direction to retrieve |
Definition at line 992 of file audiohook.c.
References AST_AUDIOHOOK_DIRECTION_READ, AST_AUDIOHOOK_DIRECTION_WRITE, audiohook_volume_get(), audiohook_volume::read_adjustment, and audiohook_volume::write_adjustment.
Referenced by confbridge_exec().
{ struct audiohook_volume *audiohook_volume = NULL; int adjustment = 0; /* Attempt to find the audiohook volume information, but do not create it as we only want to look at the values */ if (!(audiohook_volume = audiohook_volume_get(chan, 0))) { return 0; } /* Grab the adjustment value based on direction given */ if (direction == AST_AUDIOHOOK_DIRECTION_READ) { adjustment = audiohook_volume->read_adjustment; } else if (direction == AST_AUDIOHOOK_DIRECTION_WRITE) { adjustment = audiohook_volume->write_adjustment; } return adjustment; }
int ast_audiohook_volume_set | ( | struct ast_channel * | chan, |
enum ast_audiohook_direction | direction, | ||
int | volume | ||
) |
Adjust the volume on frames read from or written to a channel.
chan | Channel to muck with |
direction | Direction to set on |
volume | Value to adjust the volume by |
Definition at line 967 of file audiohook.c.
References AST_AUDIOHOOK_DIRECTION_BOTH, AST_AUDIOHOOK_DIRECTION_READ, AST_AUDIOHOOK_DIRECTION_WRITE, audiohook_volume_get(), audiohook_volume::read_adjustment, and audiohook_volume::write_adjustment.
Referenced by confbridge_exec().
{ struct audiohook_volume *audiohook_volume = NULL; /* Attempt to find the audiohook volume information, but only create it if we are not setting the adjustment value to zero */ if (!(audiohook_volume = audiohook_volume_get(chan, (volume ? 1 : 0)))) { return -1; } /* Now based on the direction set the proper value */ if (direction == AST_AUDIOHOOK_DIRECTION_READ || direction == AST_AUDIOHOOK_DIRECTION_BOTH) { audiohook_volume->read_adjustment = volume; } if (direction == AST_AUDIOHOOK_DIRECTION_WRITE || direction == AST_AUDIOHOOK_DIRECTION_BOTH) { audiohook_volume->write_adjustment = volume; } return 0; }
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.
audiohook | Audiohook structure |
direction | Direction the audio frame came from |
frame | Frame to write in |
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().
{ struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory); struct ast_slinfactory *other_factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->write_factory : &audiohook->read_factory); struct timeval *rwtime = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_time : &audiohook->write_time), previous_time = *rwtime; int our_factory_samples; int our_factory_ms; int other_factory_samples; int other_factory_ms; /* Update last feeding time to be current */ *rwtime = ast_tvnow(); our_factory_samples = ast_slinfactory_available(factory); our_factory_ms = ast_tvdiff_ms(*rwtime, previous_time) + (our_factory_samples / 8); other_factory_samples = ast_slinfactory_available(other_factory); other_factory_ms = other_factory_samples / 8; if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC) && other_factory_samples && (our_factory_ms - other_factory_ms > AST_AUDIOHOOK_SYNC_TOLERANCE)) { if (option_debug) ast_log(LOG_DEBUG, "Flushing audiohook %p so it remains in sync\n", audiohook); ast_slinfactory_flush(factory); ast_slinfactory_flush(other_factory); } if (ast_test_flag(audiohook, AST_AUDIOHOOK_SMALL_QUEUE) && (our_factory_samples > 640 || other_factory_samples > 640)) { if (option_debug) { ast_log(LOG_DEBUG, "Audiohook %p has stale audio in its factories. Flushing them both\n", audiohook); } ast_slinfactory_flush(factory); ast_slinfactory_flush(other_factory); } /* Write frame out to respective factory */ ast_slinfactory_feed(factory, frame); /* If we need to notify the respective handler of this audiohook, do so */ if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_READ) && (direction == AST_AUDIOHOOK_DIRECTION_READ)) { ast_cond_signal(&audiohook->trigger); } else if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_WRITE) && (direction == AST_AUDIOHOOK_DIRECTION_WRITE)) { ast_cond_signal(&audiohook->trigger); } else if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC)) { ast_cond_signal(&audiohook->trigger); } return 0; }
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.
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 |
Definition at line 744 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().
{ /* Pass off frame to it's respective list write function */ if (frame->frametype == AST_FRAME_VOICE) return audio_audiohook_write_list(chan, audiohook_list, direction, frame); else if (frame->frametype == AST_FRAME_DTMF) return dtmf_audiohook_write_list(chan, audiohook_list, direction, frame); else return frame; }
int ast_audiohook_write_list_empty | ( | struct ast_audiohook_list * | audiohook_list | ) |
determines if a audiohook_list is empty or not.
retval 0 false, 1 true
Definition at line 726 of file audiohook.c.
References AST_LIST_EMPTY, ast_audiohook_list::manipulate_list, ast_audiohook_list::spy_list, and ast_audiohook_list::whisper_list.
Referenced by __ast_read(), and ast_write().
{ if (AST_LIST_EMPTY(&audiohook_list->spy_list) && AST_LIST_EMPTY(&audiohook_list->whisper_list) && AST_LIST_EMPTY(&audiohook_list->manipulate_list)) { return 1; } return 0; }
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.
chan | The channel on which to find the spies |
source | The audiohook's source |
type | The type of audiohook |
Note: Function performs nlocking.
Definition at line 773 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().
{ int count = 0; struct ast_audiohook *ah = NULL; if (!chan->audiohooks) return -1; switch (type) { case AST_AUDIOHOOK_TYPE_SPY: AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->spy_list, ah, list) { if (!strcmp(ah->source, source)) { count++; } } AST_LIST_TRAVERSE_SAFE_END; break; case AST_AUDIOHOOK_TYPE_WHISPER: AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->whisper_list, ah, list) { if (!strcmp(ah->source, source)) { count++; } } AST_LIST_TRAVERSE_SAFE_END; break; case AST_AUDIOHOOK_TYPE_MANIPULATE: AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->manipulate_list, ah, list) { if (!strcmp(ah->source, source)) { count++; } } AST_LIST_TRAVERSE_SAFE_END; break; default: ast_log(LOG_DEBUG, "Invalid audiohook type supplied, (%d)\n", type); return -1; } return count; }
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.
chan | The channel on which to find the spies |
source | The source of the audiohook |
type | The type of spy to look for |
Note: Function performs no locking.
Definition at line 815 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().
{ int count = 0; struct ast_audiohook *ah = NULL; if (!chan->audiohooks) return -1; switch (type) { case AST_AUDIOHOOK_TYPE_SPY: AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->spy_list, ah, list) { if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING)) count++; } AST_LIST_TRAVERSE_SAFE_END; break; case AST_AUDIOHOOK_TYPE_WHISPER: AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->whisper_list, ah, list) { if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING)) count++; } AST_LIST_TRAVERSE_SAFE_END; break; case AST_AUDIOHOOK_TYPE_MANIPULATE: AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->manipulate_list, ah, list) { if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING)) count++; } AST_LIST_TRAVERSE_SAFE_END; break; default: ast_log(LOG_DEBUG, "Invalid audiohook type supplied, (%d)\n", type); return -1; } return count; }
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.
This function has 3 ast_frames and 3 parts to handle each. At the beginning of this function all 3 frames, start_frame, middle_frame, and end_frame point to the initial input frame.
Part_1: Translate the start_frame into SLINEAR audio if it is not already in that format. The result of this part is middle_frame is guaranteed to be in SLINEAR format for Part_2. Part_2: Send middle_frame off to spies and manipulators. At this point middle_frame is either a new frame as result of the translation, or points directly to the start_frame because no translation to SLINEAR audio was required. The result of this part is end_frame will be updated to point to middle_frame if any audiohook manipulation took place. Part_3: Translate end_frame's audio back into the format of start frame if necessary. At this point if middle_frame != end_frame, we are guaranteed that no manipulation took place and middle_frame can be freed as it was translated... If middle_frame was not translated and still pointed to start_frame, it would be equal to end_frame as well regardless if manipulation took place which would not result in this free. The result of this part is end_frame is guaranteed to be the format of start_frame for the return.
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 |
Definition at line 604 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_update_status(), ast_audiohook_write_frame(), 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_list::whisper_list, and ast_audiohook::write_factory.
Referenced by ast_audiohook_write_list().
{ struct ast_audiohook_translate *in_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->in_translate[0] : &audiohook_list->in_translate[1]); struct ast_audiohook_translate *out_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->out_translate[0] : &audiohook_list->out_translate[1]); struct ast_frame *start_frame = frame, *middle_frame = frame, *end_frame = frame; struct ast_audiohook *audiohook = NULL; int samples = frame->samples; /* ---Part_1. translate start_frame to SLINEAR if necessary. */ /* If the frame coming in is not signed linear we have to send it through the in_translate path */ if (frame->subclass != AST_FORMAT_SLINEAR) { if (in_translate->format != frame->subclass) { if (in_translate->trans_pvt) ast_translator_free_path(in_translate->trans_pvt); if (!(in_translate->trans_pvt = ast_translator_build_path(AST_FORMAT_SLINEAR, frame->subclass))) return frame; in_translate->format = frame->subclass; } if (!(middle_frame = ast_translate(in_translate->trans_pvt, frame, 0))) return frame; samples = middle_frame->samples; } /* ---Part_2: Send middle_frame to spy and manipulator lists. middle_frame is guaranteed to be SLINEAR here.*/ /* Queue up signed linear frame to each spy */ AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) { ast_audiohook_lock(audiohook); if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { AST_LIST_REMOVE_CURRENT(list); ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); ast_audiohook_unlock(audiohook); continue; } ast_audiohook_write_frame(audiohook, direction, middle_frame); ast_audiohook_unlock(audiohook); } AST_LIST_TRAVERSE_SAFE_END; /* If this frame is being written out to the channel then we need to use whisper sources */ if (direction == AST_AUDIOHOOK_DIRECTION_WRITE && !AST_LIST_EMPTY(&audiohook_list->whisper_list)) { int i = 0; short read_buf[samples], combine_buf[samples], *data1 = NULL, *data2 = NULL; memset(&combine_buf, 0, sizeof(combine_buf)); AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) { ast_audiohook_lock(audiohook); if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { AST_LIST_REMOVE_CURRENT(list); ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); ast_audiohook_unlock(audiohook); continue; } if (ast_slinfactory_available(&audiohook->write_factory) >= samples && ast_slinfactory_read(&audiohook->write_factory, read_buf, samples)) { /* Take audio from this whisper source and combine it into our main buffer */ for (i = 0, data1 = combine_buf, data2 = read_buf; i < samples; i++, data1++, data2++) ast_slinear_saturated_add(data1, data2); } ast_audiohook_unlock(audiohook); } AST_LIST_TRAVERSE_SAFE_END; /* We take all of the combined whisper sources and combine them into the audio being written out */ for (i = 0, data1 = middle_frame->data.ptr, data2 = combine_buf; i < samples; i++, data1++, data2++) ast_slinear_saturated_add(data1, data2); end_frame = middle_frame; } /* Pass off frame to manipulate audiohooks */ if (!AST_LIST_EMPTY(&audiohook_list->manipulate_list)) { AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) { ast_audiohook_lock(audiohook); if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { AST_LIST_REMOVE_CURRENT(list); ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); ast_audiohook_unlock(audiohook); /* We basically drop all of our links to the manipulate audiohook and prod it to do it's own destructive things */ audiohook->manipulate_callback(audiohook, chan, NULL, direction); continue; } /* Feed in frame to manipulation. */ if (audiohook->manipulate_callback(audiohook, chan, middle_frame, direction)) { /* XXX IGNORE FAILURE */ /* If the manipulation fails then the frame will be returned in its original state. * Since there are potentially more manipulator callbacks in the list, no action should * be taken here to exit early. */ } ast_audiohook_unlock(audiohook); } AST_LIST_TRAVERSE_SAFE_END; end_frame = middle_frame; } /* ---Part_3: Decide what to do with the end_frame (whether to transcode or not) */ if (middle_frame == end_frame) { /* Middle frame was modified and became the end frame... let's see if we need to transcode */ if (end_frame->subclass != start_frame->subclass) { if (out_translate->format != start_frame->subclass) { if (out_translate->trans_pvt) ast_translator_free_path(out_translate->trans_pvt); if (!(out_translate->trans_pvt = ast_translator_build_path(start_frame->subclass, AST_FORMAT_SLINEAR))) { /* We can't transcode this... drop our middle frame and return the original */ ast_frfree(middle_frame); return start_frame; } out_translate->format = start_frame->subclass; } /* Transcode from our middle (signed linear) frame to new format of the frame that came in */ if (!(end_frame = ast_translate(out_translate->trans_pvt, middle_frame, 0))) { /* Failed to transcode the frame... drop it and return the original */ ast_frfree(middle_frame); return start_frame; } /* Here's the scoop... middle frame is no longer of use to us */ ast_frfree(middle_frame); } } else { /* No frame was modified, we can just drop our middle frame and pass the frame we got in out */ ast_frfree(middle_frame); } return end_frame; }
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_frame::ptr, ast_audiohook::read_factory, ast_audiohook::read_time, ast_audiohook_options::read_volume, ast_frame::samples, ast_audiohook::write_factory, ast_audiohook::write_time, and ast_audiohook_options::write_volume.
Referenced by ast_audiohook_read_frame().
{ int i = 0, usable_read, usable_write; short buf1[samples], buf2[samples], *read_buf = NULL, *write_buf = NULL, *final_buf = NULL, *data1 = NULL, *data2 = NULL; struct ast_frame frame = { .frametype = AST_FRAME_VOICE, .subclass = AST_FORMAT_SLINEAR, .data.ptr = NULL, .datalen = sizeof(buf1), .samples = samples, }; /* Make sure both factories have the required samples */ usable_read = (ast_slinfactory_available(&audiohook->read_factory) >= samples ? 1 : 0); usable_write = (ast_slinfactory_available(&audiohook->write_factory) >= samples ? 1 : 0); if (!usable_read && !usable_write) { /* If both factories are unusable bail out */ ast_debug(1, "Read factory %p and write factory %p both fail to provide %zd samples\n", &audiohook->read_factory, &audiohook->write_factory, samples); return NULL; } /* If we want to provide only a read factory make sure we aren't waiting for other audio */ if (usable_read && !usable_write && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) { ast_debug(3, "Write factory %p was pretty quick last time, waiting for them.\n", &audiohook->write_factory); return NULL; } /* If we want to provide only a write factory make sure we aren't waiting for other audio */ if (usable_write && !usable_read && (ast_tvdiff_ms(ast_tvnow(), audiohook->read_time) < (samples/8)*2)) { ast_debug(3, "Read factory %p was pretty quick last time, waiting for them.\n", &audiohook->read_factory); return NULL; } /* Start with the read factory... if there are enough samples, read them in */ if (usable_read) { if (ast_slinfactory_read(&audiohook->read_factory, buf1, samples)) { read_buf = buf1; /* Adjust read volume if need be */ if (audiohook->options.read_volume) { int count = 0; short adjust_value = abs(audiohook->options.read_volume); for (count = 0; count < samples; count++) { if (audiohook->options.read_volume > 0) ast_slinear_saturated_multiply(&buf1[count], &adjust_value); else if (audiohook->options.read_volume < 0) ast_slinear_saturated_divide(&buf1[count], &adjust_value); } } } } else if (option_debug) ast_log(LOG_DEBUG, "Failed to get %d samples from read factory %p\n", (int)samples, &audiohook->read_factory); /* Move on to the write factory... if there are enough samples, read them in */ if (usable_write) { if (ast_slinfactory_read(&audiohook->write_factory, buf2, samples)) { write_buf = buf2; /* Adjust write volume if need be */ if (audiohook->options.write_volume) { int count = 0; short adjust_value = abs(audiohook->options.write_volume); for (count = 0; count < samples; count++) { if (audiohook->options.write_volume > 0) ast_slinear_saturated_multiply(&buf2[count], &adjust_value); else if (audiohook->options.write_volume < 0) ast_slinear_saturated_divide(&buf2[count], &adjust_value); } } } } else if (option_debug) ast_log(LOG_DEBUG, "Failed to get %d samples from write factory %p\n", (int)samples, &audiohook->write_factory); /* Basically we figure out which buffer to use... and if mixing can be done here */ if (!read_buf && !write_buf) return NULL; else if (read_buf && write_buf) { for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++) ast_slinear_saturated_add(data1, data2); final_buf = buf1; } else if (read_buf) final_buf = buf1; else if (write_buf) final_buf = buf2; /* Make the final buffer part of the frame, so it gets duplicated fine */ frame.data.ptr = final_buf; /* Yahoo, a combined copy of the audio! */ return ast_frdup(&frame); }
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().
{ struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory); int vol = (direction == AST_AUDIOHOOK_DIRECTION_READ ? audiohook->options.read_volume : audiohook->options.write_volume); short buf[samples]; struct ast_frame frame = { .frametype = AST_FRAME_VOICE, .subclass = AST_FORMAT_SLINEAR, .data.ptr = buf, .datalen = sizeof(buf), .samples = samples, }; /* Ensure the factory is able to give us the samples we want */ if (samples > ast_slinfactory_available(factory)) return NULL; /* Read data in from factory */ if (!ast_slinfactory_read(factory, buf, samples)) return NULL; /* If a volume adjustment needs to be applied apply it */ if (vol) ast_frame_adjust_volume(&frame, vol); return ast_frdup(&frame); }
static int audiohook_volume_callback | ( | struct ast_audiohook * | audiohook, |
struct ast_channel * | chan, | ||
struct ast_frame * | frame, | ||
enum ast_audiohook_direction | direction | ||
) | [static] |
Helper function which actually gets called by audiohooks to perform the adjustment.
audiohook | Audiohook attached to the channel |
chan | Channel we are attached to |
frame | Frame of audio we want to manipulate |
direction | Direction the audio came in from |
Definition at line 888 of file audiohook.c.
References AST_AUDIOHOOK_DIRECTION_READ, AST_AUDIOHOOK_DIRECTION_WRITE, AST_AUDIOHOOK_STATUS_DONE, ast_channel_datastore_find(), ast_frame_adjust_volume(), ast_datastore::data, audiohook_volume::read_adjustment, ast_audiohook::status, and audiohook_volume::write_adjustment.
Referenced by audiohook_volume_get().
{ struct ast_datastore *datastore = NULL; struct audiohook_volume *audiohook_volume = NULL; int *gain = NULL; /* If the audiohook is shutting down don't even bother */ if (audiohook->status == AST_AUDIOHOOK_STATUS_DONE) { return 0; } /* Try to find the datastore containg adjustment information, if we can't just bail out */ if (!(datastore = ast_channel_datastore_find(chan, &audiohook_volume_datastore, NULL))) { return 0; } audiohook_volume = datastore->data; /* Based on direction grab the appropriate adjustment value */ if (direction == AST_AUDIOHOOK_DIRECTION_READ) { gain = &audiohook_volume->read_adjustment; } else if (direction == AST_AUDIOHOOK_DIRECTION_WRITE) { gain = &audiohook_volume->write_adjustment; } /* If an adjustment value is present modify the frame */ if (gain && *gain) { ast_frame_adjust_volume(frame, *gain); } return 0; }
static void audiohook_volume_destroy | ( | void * | data | ) | [static] |
Callback used to destroy the audiohook volume datastore.
data | Volume information structure |
Definition at line 862 of file audiohook.c.
References ast_audiohook_destroy(), ast_free, and audiohook_volume::audiohook.
{ struct audiohook_volume *audiohook_volume = data; /* Destroy the audiohook as it is no longer in use */ ast_audiohook_destroy(&audiohook_volume->audiohook); /* Finally free ourselves, we are of no more use */ ast_free(audiohook_volume); return; }
static struct audiohook_volume* audiohook_volume_get | ( | struct ast_channel * | chan, |
int | create | ||
) | [static, read] |
Helper function which finds and optionally creates an audiohook_volume_datastore datastore on a channel.
chan | Channel to look on |
create | Whether to create the datastore if not found |
Definition at line 926 of file audiohook.c.
References ast_audiohook_attach(), ast_audiohook_init(), AST_AUDIOHOOK_TYPE_MANIPULATE, ast_calloc, ast_channel_datastore_add(), ast_channel_datastore_find(), ast_datastore_alloc(), ast_datastore_free(), audiohook_volume::audiohook, audiohook_volume_callback(), ast_datastore::data, and ast_audiohook::manipulate_callback.
Referenced by ast_audiohook_volume_adjust(), ast_audiohook_volume_get(), and ast_audiohook_volume_set().
{ struct ast_datastore *datastore = NULL; struct audiohook_volume *audiohook_volume = NULL; /* If we are able to find the datastore return the contents (which is actually an audiohook_volume structure) */ if ((datastore = ast_channel_datastore_find(chan, &audiohook_volume_datastore, NULL))) { return datastore->data; } /* If we are not allowed to create a datastore or if we fail to create a datastore, bail out now as we have nothing for them */ if (!create || !(datastore = ast_datastore_alloc(&audiohook_volume_datastore, NULL))) { return NULL; } /* Create a new audiohook_volume structure to contain our adjustments and audiohook */ if (!(audiohook_volume = ast_calloc(1, sizeof(*audiohook_volume)))) { ast_datastore_free(datastore); return NULL; } /* Setup our audiohook structure so we can manipulate the audio */ ast_audiohook_init(&audiohook_volume->audiohook, AST_AUDIOHOOK_TYPE_MANIPULATE, "Volume"); audiohook_volume->audiohook.manipulate_callback = audiohook_volume_callback; /* Attach the audiohook_volume blob to the datastore and attach to the channel */ datastore->data = audiohook_volume; ast_channel_datastore_add(chan, datastore); /* All is well... put the audiohook into motion */ ast_audiohook_attach(chan, &audiohook_volume->audiohook); return audiohook_volume; }
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.
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 |
Definition at line 553 of file audiohook.c.
References ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, AST_AUDIOHOOK_STATUS_RUNNING, ast_audiohook_unlock, ast_audiohook_update_status(), 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().
{ struct ast_audiohook *audiohook = NULL; AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) { ast_audiohook_lock(audiohook); if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { AST_LIST_REMOVE_CURRENT(list); ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE); ast_audiohook_unlock(audiohook); audiohook->manipulate_callback(audiohook, NULL, NULL, 0); continue; } if (ast_test_flag(audiohook, AST_AUDIOHOOK_WANTS_DTMF)) audiohook->manipulate_callback(audiohook, chan, frame, direction); ast_audiohook_unlock(audiohook); } AST_LIST_TRAVERSE_SAFE_END; return frame; }
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
audiohook_list | The list of audiohooks to search in |
source | The source of the audiohook we wish to find |
Definition at line 440 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().
{ struct ast_audiohook *audiohook = NULL; AST_LIST_TRAVERSE(&audiohook_list->spy_list, audiohook, list) { if (!strcasecmp(audiohook->source, source)) return audiohook; } AST_LIST_TRAVERSE(&audiohook_list->whisper_list, audiohook, list) { if (!strcasecmp(audiohook->source, source)) return audiohook; } AST_LIST_TRAVERSE(&audiohook_list->manipulate_list, audiohook, list) { if (!strcasecmp(audiohook->source, source)) return audiohook; } return NULL; }
struct ast_datastore_info audiohook_volume_datastore [static] |
{ .type = "Volume", .destroy = audiohook_volume_destroy, }
Datastore used to store audiohook volume information.
Definition at line 876 of file audiohook.c.