#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/options.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 |
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. | |
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. | |
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. | |
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. | |
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 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) |
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 341 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(), start_spying(), and startmon().
00342 { 00343 ast_channel_lock(chan); 00344 00345 if (!chan->audiohooks) { 00346 /* Whoops... allocate a new structure */ 00347 if (!(chan->audiohooks = ast_calloc(1, sizeof(*chan->audiohooks)))) { 00348 ast_channel_unlock(chan); 00349 return -1; 00350 } 00351 AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->spy_list); 00352 AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->whisper_list); 00353 AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->manipulate_list); 00354 } 00355 00356 /* Drop into respective list */ 00357 if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY) 00358 AST_LIST_INSERT_TAIL(&chan->audiohooks->spy_list, audiohook, list); 00359 else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER) 00360 AST_LIST_INSERT_TAIL(&chan->audiohooks->whisper_list, audiohook, list); 00361 else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE) 00362 AST_LIST_INSERT_TAIL(&chan->audiohooks->manipulate_list, audiohook, list); 00363 00364 /* Change status over to running since it is now attached */ 00365 audiohook->status = AST_AUDIOHOOK_STATUS_RUNNING; 00366 00367 ast_channel_unlock(chan); 00368 00369 return 0; 00370 }
int ast_audiohook_destroy | ( | struct ast_audiohook * | audiohook | ) |
Destroys an audiohook structure.
audiohook | Audiohook structure |
Definition at line 98 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_monitor_audiohook(), and launch_monitor_thread().
00099 { 00100 /* Drop the factories used by this audiohook type */ 00101 switch (audiohook->type) { 00102 case AST_AUDIOHOOK_TYPE_SPY: 00103 ast_slinfactory_destroy(&audiohook->read_factory); 00104 case AST_AUDIOHOOK_TYPE_WHISPER: 00105 ast_slinfactory_destroy(&audiohook->write_factory); 00106 break; 00107 default: 00108 break; 00109 } 00110 00111 /* Destroy translation path if present */ 00112 if (audiohook->trans_pvt) 00113 ast_translator_free_path(audiohook->trans_pvt); 00114 00115 /* Lock and trigger be gone! */ 00116 ast_cond_destroy(&audiohook->trigger); 00117 ast_mutex_destroy(&audiohook->lock); 00118 00119 return 0; 00120 }
int ast_audiohook_detach | ( | struct ast_audiohook * | audiohook | ) |
Detach audiohook from channel.
audiohook | Audiohook structure |
Definition at line 376 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(), and destroy_monitor_audiohook().
00377 { 00378 if (audiohook->status == AST_AUDIOHOOK_STATUS_DONE) 00379 return 0; 00380 00381 audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN; 00382 00383 while (audiohook->status != AST_AUDIOHOOK_STATUS_DONE) 00384 ast_audiohook_trigger_wait(audiohook); 00385 00386 return 0; 00387 }
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 393 of file audiohook.c.
References ast_audiohook_lock, AST_AUDIOHOOK_STATUS_DONE, ast_audiohook_unlock, ast_cond_signal(), ast_free, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_translator_free_path(), ast_audiohook_list::in_translate, 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_read(), ast_hangup(), and ast_write().
00394 { 00395 int i = 0; 00396 struct ast_audiohook *audiohook = NULL; 00397 00398 /* Drop any spies */ 00399 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) { 00400 ast_audiohook_lock(audiohook); 00401 AST_LIST_REMOVE_CURRENT(&audiohook_list->spy_list, list); 00402 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00403 ast_cond_signal(&audiohook->trigger); 00404 ast_audiohook_unlock(audiohook); 00405 } 00406 AST_LIST_TRAVERSE_SAFE_END 00407 00408 /* Drop any whispering sources */ 00409 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) { 00410 ast_audiohook_lock(audiohook); 00411 AST_LIST_REMOVE_CURRENT(&audiohook_list->whisper_list, list); 00412 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00413 ast_cond_signal(&audiohook->trigger); 00414 ast_audiohook_unlock(audiohook); 00415 } 00416 AST_LIST_TRAVERSE_SAFE_END 00417 00418 /* Drop any manipulaters */ 00419 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) { 00420 ast_audiohook_lock(audiohook); 00421 AST_LIST_REMOVE_CURRENT(&audiohook_list->manipulate_list, list); 00422 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00423 ast_audiohook_unlock(audiohook); 00424 audiohook->manipulate_callback(audiohook, NULL, NULL, 0); 00425 } 00426 AST_LIST_TRAVERSE_SAFE_END 00427 00428 /* Drop translation paths if present */ 00429 for (i = 0; i < 2; i++) { 00430 if (audiohook_list->in_translate[i].trans_pvt) 00431 ast_translator_free_path(audiohook_list->in_translate[i].trans_pvt); 00432 if (audiohook_list->out_translate[i].trans_pvt) 00433 ast_translator_free_path(audiohook_list->out_translate[i].trans_pvt); 00434 } 00435 00436 /* Free ourselves */ 00437 ast_free(audiohook_list); 00438 00439 return 0; 00440 }
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 488 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 mixmonitor_cli(), and stop_mixmonitor_exec().
00489 { 00490 struct ast_audiohook *audiohook = NULL; 00491 00492 ast_channel_lock(chan); 00493 00494 /* Ensure the channel has audiohooks on it */ 00495 if (!chan->audiohooks) { 00496 ast_channel_unlock(chan); 00497 return -1; 00498 } 00499 00500 audiohook = find_audiohook_by_source(chan->audiohooks, source); 00501 00502 ast_channel_unlock(chan); 00503 00504 if (audiohook && audiohook->status != AST_AUDIOHOOK_STATUS_DONE) 00505 audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN; 00506 00507 return (audiohook ? 0 : -1); 00508 }
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 67 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(), and launch_monitor_thread().
00068 { 00069 /* Need to keep the type and source */ 00070 audiohook->type = type; 00071 audiohook->source = source; 00072 00073 /* Initialize lock that protects our audiohook */ 00074 ast_mutex_init(&audiohook->lock); 00075 ast_cond_init(&audiohook->trigger, NULL); 00076 00077 /* Setup the factories that are needed for this audiohook type */ 00078 switch (type) { 00079 case AST_AUDIOHOOK_TYPE_SPY: 00080 ast_slinfactory_init(&audiohook->read_factory); 00081 case AST_AUDIOHOOK_TYPE_WHISPER: 00082 ast_slinfactory_init(&audiohook->write_factory); 00083 break; 00084 default: 00085 break; 00086 } 00087 00088 /* Since we are just starting out... this audiohook is new */ 00089 audiohook->status = AST_AUDIOHOOK_STATUS_NEW; 00090 00091 return 0; 00092 }
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 464 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().
00465 { 00466 struct ast_audiohook *audiohook; 00467 00468 if (!old_chan->audiohooks || !(audiohook = find_audiohook_by_source(old_chan->audiohooks, source))) { 00469 return; 00470 } 00471 00472 /* By locking both channels and the audiohook, we can assure that 00473 * another thread will not have a chance to read the audiohook's status 00474 * as done, even though ast_audiohook_remove signals the trigger 00475 * condition 00476 */ 00477 ast_audiohook_lock(audiohook); 00478 ast_audiohook_remove(old_chan, audiohook); 00479 ast_audiohook_attach(new_chan, audiohook); 00480 ast_audiohook_unlock(audiohook); 00481 }
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.
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 306 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(), and read_frame().
Referenced by mixmonitor_thread(), and spy_generate().
00307 { 00308 struct ast_frame *read_frame = NULL, *final_frame = NULL; 00309 00310 if (!(read_frame = (direction == AST_AUDIOHOOK_DIRECTION_BOTH ? audiohook_read_frame_both(audiohook, samples) : audiohook_read_frame_single(audiohook, samples, direction)))) 00311 return NULL; 00312 00313 /* If they don't want signed linear back out, we'll have to send it through the translation path */ 00314 if (format != AST_FORMAT_SLINEAR) { 00315 /* Rebuild translation path if different format then previously */ 00316 if (audiohook->format != format) { 00317 if (audiohook->trans_pvt) { 00318 ast_translator_free_path(audiohook->trans_pvt); 00319 audiohook->trans_pvt = NULL; 00320 } 00321 /* 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 */ 00322 if (!(audiohook->trans_pvt = ast_translator_build_path(format, AST_FORMAT_SLINEAR))) { 00323 ast_frfree(read_frame); 00324 return NULL; 00325 } 00326 } 00327 /* Convert to requested format, and allow the read in frame to be freed */ 00328 final_frame = ast_translate(audiohook->trans_pvt, read_frame, 1); 00329 } else { 00330 final_frame = read_frame; 00331 } 00332 00333 return final_frame; 00334 }
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 520 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::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().
00521 { 00522 ast_channel_lock(chan); 00523 00524 if (!chan->audiohooks) { 00525 ast_channel_unlock(chan); 00526 return -1; 00527 } 00528 00529 if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY) 00530 AST_LIST_REMOVE(&chan->audiohooks->spy_list, audiohook, list); 00531 else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER) 00532 AST_LIST_REMOVE(&chan->audiohooks->whisper_list, audiohook, list); 00533 else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE) 00534 AST_LIST_REMOVE(&chan->audiohooks->manipulate_list, audiohook, list); 00535 00536 ast_audiohook_lock(audiohook); 00537 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00538 ast_cond_signal(&audiohook->trigger); 00539 ast_audiohook_unlock(audiohook); 00540 00541 ast_channel_unlock(chan); 00542 00543 return 0; 00544 }
void ast_audiohook_trigger_wait | ( | struct ast_audiohook * | audiohook | ) |
Wait for audiohook trigger to be triggered.
audiohook | Audiohook to wait on |
Definition at line 760 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().
00761 { 00762 struct timeval tv; 00763 struct timespec ts; 00764 00765 tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000)); 00766 ts.tv_sec = tv.tv_sec; 00767 ts.tv_nsec = tv.tv_usec * 1000; 00768 00769 ast_cond_timedwait(&audiohook->trigger, &audiohook->lock, &ts); 00770 00771 return; 00772 }
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 128 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().
00129 { 00130 struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory); 00131 struct ast_slinfactory *other_factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->write_factory : &audiohook->read_factory); 00132 struct timeval *time = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_time : &audiohook->write_time), previous_time = *time; 00133 int our_factory_samples; 00134 int our_factory_ms; 00135 int other_factory_samples; 00136 int other_factory_ms; 00137 00138 /* Update last feeding time to be current */ 00139 *time = ast_tvnow(); 00140 00141 our_factory_samples = ast_slinfactory_available(factory); 00142 our_factory_ms = ast_tvdiff_ms(*time, previous_time) + (our_factory_samples / 8); 00143 other_factory_samples = ast_slinfactory_available(other_factory); 00144 other_factory_ms = other_factory_samples / 8; 00145 00146 /* If we are using a sync trigger and this factory suddenly got audio fed in after a lapse, then flush both factories to ensure they remain in sync */ 00147 if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC) && other_factory_samples && (our_factory_ms - other_factory_ms > AST_AUDIOHOOK_SYNC_TOLERANCE)) { 00148 if (option_debug) 00149 ast_log(LOG_DEBUG, "Flushing audiohook %p so it remains in sync\n", audiohook); 00150 ast_slinfactory_flush(factory); 00151 ast_slinfactory_flush(other_factory); 00152 } 00153 00154 if (ast_test_flag(audiohook, AST_AUDIOHOOK_SMALL_QUEUE) && (our_factory_samples > 640 || other_factory_samples > 640)) { 00155 if (option_debug) { 00156 ast_log(LOG_DEBUG, "Audiohook %p has stale audio in its factories. Flushing them both\n", audiohook); 00157 } 00158 ast_slinfactory_flush(factory); 00159 ast_slinfactory_flush(other_factory); 00160 } 00161 00162 /* Write frame out to respective factory */ 00163 ast_slinfactory_feed(factory, frame); 00164 00165 /* If we need to notify the respective handler of this audiohook, do so */ 00166 if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_READ) && (direction == AST_AUDIOHOOK_DIRECTION_READ)) { 00167 ast_cond_signal(&audiohook->trigger); 00168 } else if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_WRITE) && (direction == AST_AUDIOHOOK_DIRECTION_WRITE)) { 00169 ast_cond_signal(&audiohook->trigger); 00170 } else if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC)) { 00171 ast_cond_signal(&audiohook->trigger); 00172 } 00173 00174 return 0; 00175 }
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.
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 746 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().
00747 { 00748 /* Pass off frame to it's respective list write function */ 00749 if (frame->frametype == AST_FRAME_VOICE) 00750 return audio_audiohook_write_list(chan, audiohook_list, direction, frame); 00751 else if (frame->frametype == AST_FRAME_DTMF) 00752 return dtmf_audiohook_write_list(chan, audiohook_list, direction, frame); 00753 else 00754 return frame; 00755 }
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 728 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().
00729 { 00730 if (AST_LIST_EMPTY(&audiohook_list->spy_list) && 00731 AST_LIST_EMPTY(&audiohook_list->whisper_list) && 00732 AST_LIST_EMPTY(&audiohook_list->manipulate_list)) { 00733 00734 return 1; 00735 } 00736 return 0; 00737 }
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] |
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_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::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().
00605 { 00606 struct ast_audiohook_translate *in_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->in_translate[0] : &audiohook_list->in_translate[1]); 00607 struct ast_audiohook_translate *out_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->out_translate[0] : &audiohook_list->out_translate[1]); 00608 struct ast_frame *start_frame = frame, *middle_frame = frame, *end_frame = frame; 00609 struct ast_audiohook *audiohook = NULL; 00610 int samples = frame->samples; 00611 00612 /* ---Part_1. translate start_frame to SLINEAR if necessary. */ 00613 /* If the frame coming in is not signed linear we have to send it through the in_translate path */ 00614 if (frame->subclass != AST_FORMAT_SLINEAR) { 00615 if (in_translate->format != frame->subclass) { 00616 if (in_translate->trans_pvt) 00617 ast_translator_free_path(in_translate->trans_pvt); 00618 if (!(in_translate->trans_pvt = ast_translator_build_path(AST_FORMAT_SLINEAR, frame->subclass))) 00619 return frame; 00620 in_translate->format = frame->subclass; 00621 } 00622 if (!(middle_frame = ast_translate(in_translate->trans_pvt, frame, 0))) 00623 return frame; 00624 samples = middle_frame->samples; 00625 } 00626 00627 /* ---Part_2: Send middle_frame to spy and manipulator lists. middle_frame is guaranteed to be SLINEAR here.*/ 00628 /* Queue up signed linear frame to each spy */ 00629 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) { 00630 ast_audiohook_lock(audiohook); 00631 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { 00632 AST_LIST_REMOVE_CURRENT(&audiohook_list->spy_list, list); 00633 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00634 ast_cond_signal(&audiohook->trigger); 00635 ast_audiohook_unlock(audiohook); 00636 continue; 00637 } 00638 ast_audiohook_write_frame(audiohook, direction, middle_frame); 00639 ast_audiohook_unlock(audiohook); 00640 } 00641 AST_LIST_TRAVERSE_SAFE_END 00642 00643 /* If this frame is being written out to the channel then we need to use whisper sources */ 00644 if (direction == AST_AUDIOHOOK_DIRECTION_WRITE && !AST_LIST_EMPTY(&audiohook_list->whisper_list)) { 00645 int i = 0; 00646 short read_buf[samples], combine_buf[samples], *data1 = NULL, *data2 = NULL; 00647 memset(&combine_buf, 0, sizeof(combine_buf)); 00648 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) { 00649 ast_audiohook_lock(audiohook); 00650 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { 00651 AST_LIST_REMOVE_CURRENT(&audiohook_list->whisper_list, list); 00652 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00653 ast_cond_signal(&audiohook->trigger); 00654 ast_audiohook_unlock(audiohook); 00655 continue; 00656 } 00657 if (ast_slinfactory_available(&audiohook->write_factory) >= samples && ast_slinfactory_read(&audiohook->write_factory, read_buf, samples)) { 00658 /* Take audio from this whisper source and combine it into our main buffer */ 00659 for (i = 0, data1 = combine_buf, data2 = read_buf; i < samples; i++, data1++, data2++) 00660 ast_slinear_saturated_add(data1, data2); 00661 } 00662 ast_audiohook_unlock(audiohook); 00663 } 00664 AST_LIST_TRAVERSE_SAFE_END 00665 /* We take all of the combined whisper sources and combine them into the audio being written out */ 00666 for (i = 0, data1 = middle_frame->data, data2 = combine_buf; i < samples; i++, data1++, data2++) 00667 ast_slinear_saturated_add(data1, data2); 00668 end_frame = middle_frame; 00669 } 00670 00671 /* Pass off frame to manipulate audiohooks */ 00672 if (!AST_LIST_EMPTY(&audiohook_list->manipulate_list)) { 00673 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) { 00674 ast_audiohook_lock(audiohook); 00675 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { 00676 AST_LIST_REMOVE_CURRENT(&audiohook_list->manipulate_list, list); 00677 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00678 ast_audiohook_unlock(audiohook); 00679 /* We basically drop all of our links to the manipulate audiohook and prod it to do it's own destructive things */ 00680 audiohook->manipulate_callback(audiohook, chan, NULL, direction); 00681 continue; 00682 } 00683 /* Feed in frame to manipulation */ 00684 if (audiohook->manipulate_callback(audiohook, chan, middle_frame, direction)) { 00685 /* XXX IGNORE FAILURE */ 00686 00687 /* If the manipulation fails then the frame will be returned in its original state. 00688 * Since there are potentially more manipulator callbacks in the list, no action should 00689 * be taken here to exit early. */ 00690 } 00691 ast_audiohook_unlock(audiohook); 00692 } 00693 AST_LIST_TRAVERSE_SAFE_END 00694 end_frame = middle_frame; 00695 } 00696 00697 /* ---Part_3: Decide what to do with the end_frame (whether to transcode or not) */ 00698 if (middle_frame == end_frame) { 00699 /* Middle frame was modified and became the end frame... let's see if we need to transcode */ 00700 if (end_frame->subclass != start_frame->subclass) { 00701 if (out_translate->format != start_frame->subclass) { 00702 if (out_translate->trans_pvt) 00703 ast_translator_free_path(out_translate->trans_pvt); 00704 if (!(out_translate->trans_pvt = ast_translator_build_path(start_frame->subclass, AST_FORMAT_SLINEAR))) { 00705 /* We can't transcode this... drop our middle frame and return the original */ 00706 ast_frfree(middle_frame); 00707 return start_frame; 00708 } 00709 out_translate->format = start_frame->subclass; 00710 } 00711 /* Transcode from our middle (signed linear) frame to new format of the frame that came in */ 00712 if (!(end_frame = ast_translate(out_translate->trans_pvt, middle_frame, 0))) { 00713 /* Failed to transcode the frame... drop it and return the original */ 00714 ast_frfree(middle_frame); 00715 return start_frame; 00716 } 00717 /* Here's the scoop... middle frame is no longer of use to us */ 00718 ast_frfree(middle_frame); 00719 } 00720 } else { 00721 /* No frame was modified, we can just drop our middle frame and pass the frame we got in out */ 00722 ast_frfree(middle_frame); 00723 } 00724 00725 return end_frame; 00726 }
static struct ast_frame* audiohook_read_frame_both | ( | struct ast_audiohook * | audiohook, | |
size_t | samples | |||
) | [static] |
Definition at line 205 of file audiohook.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_log(), ast_slinear_saturated_divide(), ast_slinear_saturated_multiply(), ast_slinfactory_available(), ast_slinfactory_read(), ast_tvdiff_ms(), ast_tvnow(), 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().
00206 { 00207 int i = 0, usable_read, usable_write; 00208 short buf1[samples], buf2[samples], *read_buf = NULL, *write_buf = NULL, *final_buf = NULL, *data1 = NULL, *data2 = NULL; 00209 struct ast_frame frame = { 00210 .frametype = AST_FRAME_VOICE, 00211 .subclass = AST_FORMAT_SLINEAR, 00212 .data = NULL, 00213 .datalen = sizeof(buf1), 00214 .samples = samples, 00215 }; 00216 00217 /* Make sure both factories have the required samples */ 00218 usable_read = (ast_slinfactory_available(&audiohook->read_factory) >= samples ? 1 : 0); 00219 usable_write = (ast_slinfactory_available(&audiohook->write_factory) >= samples ? 1 : 0); 00220 00221 if (!usable_read && !usable_write) { 00222 /* If both factories are unusable bail out */ 00223 if (option_debug) 00224 ast_log(LOG_DEBUG, "Read factory %p and write factory %p both fail to provide %zd samples\n", &audiohook->read_factory, &audiohook->write_factory, samples); 00225 return NULL; 00226 } 00227 00228 /* If we want to provide only a read factory make sure we aren't waiting for other audio */ 00229 if (usable_read && !usable_write && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) { 00230 if (option_debug > 2) 00231 ast_log(LOG_DEBUG, "Write factory %p was pretty quick last time, waiting for them.\n", &audiohook->write_factory); 00232 return NULL; 00233 } 00234 00235 /* If we want to provide only a write factory make sure we aren't waiting for other audio */ 00236 if (usable_write && !usable_read && (ast_tvdiff_ms(ast_tvnow(), audiohook->read_time) < (samples/8)*2)) { 00237 if (option_debug > 2) 00238 ast_log(LOG_DEBUG, "Read factory %p was pretty quick last time, waiting for them.\n", &audiohook->read_factory); 00239 return NULL; 00240 } 00241 00242 /* Start with the read factory... if there are enough samples, read them in */ 00243 if (usable_read) { 00244 if (ast_slinfactory_read(&audiohook->read_factory, buf1, samples)) { 00245 read_buf = buf1; 00246 /* Adjust read volume if need be */ 00247 if (audiohook->options.read_volume) { 00248 int count = 0; 00249 short adjust_value = abs(audiohook->options.read_volume); 00250 for (count = 0; count < samples; count++) { 00251 if (audiohook->options.read_volume > 0) 00252 ast_slinear_saturated_multiply(&buf1[count], &adjust_value); 00253 else if (audiohook->options.read_volume < 0) 00254 ast_slinear_saturated_divide(&buf1[count], &adjust_value); 00255 } 00256 } 00257 } 00258 } else if (option_debug) 00259 ast_log(LOG_DEBUG, "Failed to get %zd samples from read factory %p\n", samples, &audiohook->read_factory); 00260 00261 /* Move on to the write factory... if there are enough samples, read them in */ 00262 if (usable_write) { 00263 if (ast_slinfactory_read(&audiohook->write_factory, buf2, samples)) { 00264 write_buf = buf2; 00265 /* Adjust write volume if need be */ 00266 if (audiohook->options.write_volume) { 00267 int count = 0; 00268 short adjust_value = abs(audiohook->options.write_volume); 00269 for (count = 0; count < samples; count++) { 00270 if (audiohook->options.write_volume > 0) 00271 ast_slinear_saturated_multiply(&buf2[count], &adjust_value); 00272 else if (audiohook->options.write_volume < 0) 00273 ast_slinear_saturated_divide(&buf2[count], &adjust_value); 00274 } 00275 } 00276 } 00277 } else if (option_debug) 00278 ast_log(LOG_DEBUG, "Failed to get %zd samples from write factory %p\n", samples, &audiohook->write_factory); 00279 00280 /* Basically we figure out which buffer to use... and if mixing can be done here */ 00281 if (!read_buf && !write_buf) 00282 return NULL; 00283 else if (read_buf && write_buf) { 00284 for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++) 00285 ast_slinear_saturated_add(data1, data2); 00286 final_buf = buf1; 00287 } else if (read_buf) 00288 final_buf = buf1; 00289 else if (write_buf) 00290 final_buf = buf2; 00291 00292 /* Make the final buffer part of the frame, so it gets duplicated fine */ 00293 frame.data = final_buf; 00294 00295 /* Yahoo, a combined copy of the audio! */ 00296 return ast_frdup(&frame); 00297 }
static struct ast_frame* audiohook_read_frame_single | ( | struct ast_audiohook * | audiohook, | |
size_t | samples, | |||
enum ast_audiohook_direction | direction | |||
) | [static] |
Definition at line 177 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(), 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().
00178 { 00179 struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory); 00180 int vol = (direction == AST_AUDIOHOOK_DIRECTION_READ ? audiohook->options.read_volume : audiohook->options.write_volume); 00181 short buf[samples]; 00182 struct ast_frame frame = { 00183 .frametype = AST_FRAME_VOICE, 00184 .subclass = AST_FORMAT_SLINEAR, 00185 .data = buf, 00186 .datalen = sizeof(buf), 00187 .samples = samples, 00188 }; 00189 00190 /* Ensure the factory is able to give us the samples we want */ 00191 if (samples > ast_slinfactory_available(factory)) 00192 return NULL; 00193 00194 /* Read data in from factory */ 00195 if (!ast_slinfactory_read(factory, buf, samples)) 00196 return NULL; 00197 00198 /* If a volume adjustment needs to be applied apply it */ 00199 if (vol) 00200 ast_frame_adjust_volume(&frame, vol); 00201 00202 return ast_frdup(&frame); 00203 }
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] |
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_WANTS_DTMF, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_test_flag, ast_audiohook::manipulate_callback, ast_audiohook_list::manipulate_list, and ast_audiohook::status.
Referenced by ast_audiohook_write_list().
00554 { 00555 struct ast_audiohook *audiohook = NULL; 00556 00557 AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) { 00558 ast_audiohook_lock(audiohook); 00559 if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) { 00560 AST_LIST_REMOVE_CURRENT(&audiohook_list->manipulate_list, list); 00561 audiohook->status = AST_AUDIOHOOK_STATUS_DONE; 00562 ast_audiohook_unlock(audiohook); 00563 audiohook->manipulate_callback(audiohook, NULL, NULL, 0); 00564 continue; 00565 } 00566 if (ast_test_flag(audiohook, AST_AUDIOHOOK_WANTS_DTMF)) 00567 audiohook->manipulate_callback(audiohook, chan, frame, direction); 00568 ast_audiohook_unlock(audiohook); 00569 } 00570 AST_LIST_TRAVERSE_SAFE_END 00571 00572 return frame; 00573 }
static struct ast_audiohook* find_audiohook_by_source | ( | struct ast_audiohook_list * | audiohook_list, | |
const char * | source | |||
) | [static] |
Definition at line 442 of file audiohook.c.
References AST_LIST_TRAVERSE, 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().
00443 { 00444 struct ast_audiohook *audiohook = NULL; 00445 00446 AST_LIST_TRAVERSE(&audiohook_list->spy_list, audiohook, list) { 00447 if (!strcasecmp(audiohook->source, source)) 00448 return audiohook; 00449 } 00450 00451 AST_LIST_TRAVERSE(&audiohook_list->whisper_list, audiohook, list) { 00452 if (!strcasecmp(audiohook->source, source)) 00453 return audiohook; 00454 } 00455 00456 AST_LIST_TRAVERSE(&audiohook_list->manipulate_list, audiohook, list) { 00457 if (!strcasecmp(audiohook->source, source)) 00458 return audiohook; 00459 } 00460 00461 return NULL; 00462 }