#include "asterisk/linkedlists.h"
Go to the source code of this file.
Data Structures | |
struct | ast_channel_spy |
struct | ast_channel_spy_queue |
Enumerations | |
enum | chanspy_flags { CHANSPY_MIXAUDIO = (1 << 0), CHANSPY_READ_VOLADJUST = (1 << 1), CHANSPY_WRITE_VOLADJUST = (1 << 2), CHANSPY_FORMAT_AUDIO = (1 << 3), CHANSPY_TRIGGER_MODE = (3 << 4), CHANSPY_TRIGGER_READ = (1 << 4), CHANSPY_TRIGGER_WRITE = (2 << 4), CHANSPY_TRIGGER_NONE = (3 << 4), CHANSPY_TRIGGER_FLUSH = (1 << 6) } |
enum | chanspy_states { CHANSPY_NEW = 0, CHANSPY_RUNNING = 1, CHANSPY_DONE = 2, CHANSPY_STOP = 3 } |
Functions | |
int | ast_channel_spy_add (struct ast_channel *chan, struct ast_channel_spy *spy) |
Adds a spy to a channel, to begin receiving copies of the channel's audio frames. | |
void | ast_channel_spy_free (struct ast_channel_spy *spy) |
Free a spy. | |
struct ast_frame * | ast_channel_spy_read_frame (struct ast_channel_spy *spy, unsigned int samples) |
Read one (or more) frames of audio from a channel being spied upon. | |
void | ast_channel_spy_remove (struct ast_channel *chan, struct ast_channel_spy *spy) |
Remove a spy from a channel. | |
void | ast_channel_spy_stop_by_type (struct ast_channel *chan, const char *type) |
Find all spies of a particular type on a channel and stop them. | |
void | ast_channel_spy_trigger_wait (struct ast_channel_spy *spy) |
Efficiently wait until audio is available for a spy, or an exception occurs. |
Definition in file chanspy.h.
enum chanspy_flags |
CHANSPY_MIXAUDIO | |
CHANSPY_READ_VOLADJUST | |
CHANSPY_WRITE_VOLADJUST | |
CHANSPY_FORMAT_AUDIO | |
CHANSPY_TRIGGER_MODE | |
CHANSPY_TRIGGER_READ | |
CHANSPY_TRIGGER_WRITE | |
CHANSPY_TRIGGER_NONE | |
CHANSPY_TRIGGER_FLUSH |
Definition at line 39 of file chanspy.h.
00039 { 00040 CHANSPY_MIXAUDIO = (1 << 0), 00041 CHANSPY_READ_VOLADJUST = (1 << 1), 00042 CHANSPY_WRITE_VOLADJUST = (1 << 2), 00043 CHANSPY_FORMAT_AUDIO = (1 << 3), 00044 CHANSPY_TRIGGER_MODE = (3 << 4), 00045 CHANSPY_TRIGGER_READ = (1 << 4), 00046 CHANSPY_TRIGGER_WRITE = (2 << 4), 00047 CHANSPY_TRIGGER_NONE = (3 << 4), 00048 CHANSPY_TRIGGER_FLUSH = (1 << 6), 00049 };
enum chanspy_states |
Definition at line 32 of file chanspy.h.
00032 { 00033 CHANSPY_NEW = 0, /*!< spy not yet operating */ 00034 CHANSPY_RUNNING = 1, /*!< normal operation, spy is still operating */ 00035 CHANSPY_DONE = 2, /*!< spy is stopped and already removed from channel */ 00036 CHANSPY_STOP = 3, /*!< spy requested to stop, still attached to channel */ 00037 };
int ast_channel_spy_add | ( | struct ast_channel * | chan, | |
struct ast_channel_spy * | spy | |||
) |
Adds a spy to a channel, to begin receiving copies of the channel's audio frames.
chan | The channel to add the spy to. | |
spy | A pointer to ast_channel_spy structure describing how the spy is to be used. |
Definition at line 1415 of file channel.c.
References ast_calloc, ast_clear_flag, ast_cond_init(), AST_FORMAT_SLINEAR, ast_getformatname(), AST_LIST_HEAD_INIT_NOLOCK, AST_LIST_INSERT_HEAD, AST_LIST_INSERT_TAIL, ast_log(), ast_set_flag, ast_test_flag, ast_channel_spy::chan, CHANSPY_FORMAT_AUDIO, CHANSPY_MIXAUDIO, CHANSPY_READ_VOLADJUST, CHANSPY_TRIGGER_MODE, CHANSPY_TRIGGER_NONE, CHANSPY_TRIGGER_READ, CHANSPY_TRIGGER_WRITE, CHANSPY_WRITE_VOLADJUST, ast_channel_spy_queue::format, LOG_DEBUG, LOG_WARNING, option_debug, ast_channel_spy::read_queue, ast_channel::spies, ast_channel_spy::trigger, ast_channel_spy::type, and ast_channel_spy::write_queue.
Referenced by start_spying(), and startmon().
01416 { 01417 /* Link the owner channel to the spy */ 01418 spy->chan = chan; 01419 01420 if (!ast_test_flag(spy, CHANSPY_FORMAT_AUDIO)) { 01421 ast_log(LOG_WARNING, "Could not add channel spy '%s' to channel '%s', only audio format spies are supported.\n", 01422 spy->type, chan->name); 01423 return -1; 01424 } 01425 01426 if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST) && (spy->read_queue.format != AST_FORMAT_SLINEAR)) { 01427 ast_log(LOG_WARNING, "Cannot provide volume adjustment on '%s' format spies\n", 01428 ast_getformatname(spy->read_queue.format)); 01429 return -1; 01430 } 01431 01432 if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST) && (spy->write_queue.format != AST_FORMAT_SLINEAR)) { 01433 ast_log(LOG_WARNING, "Cannot provide volume adjustment on '%s' format spies\n", 01434 ast_getformatname(spy->write_queue.format)); 01435 return -1; 01436 } 01437 01438 if (ast_test_flag(spy, CHANSPY_MIXAUDIO) && 01439 ((spy->read_queue.format != AST_FORMAT_SLINEAR) || 01440 (spy->write_queue.format != AST_FORMAT_SLINEAR))) { 01441 ast_log(LOG_WARNING, "Cannot provide audio mixing on '%s'-'%s' format spies\n", 01442 ast_getformatname(spy->read_queue.format), ast_getformatname(spy->write_queue.format)); 01443 return -1; 01444 } 01445 01446 if (!chan->spies) { 01447 if (!(chan->spies = ast_calloc(1, sizeof(*chan->spies)))) { 01448 return -1; 01449 } 01450 01451 AST_LIST_HEAD_INIT_NOLOCK(&chan->spies->list); 01452 AST_LIST_INSERT_HEAD(&chan->spies->list, spy, list); 01453 } else { 01454 AST_LIST_INSERT_TAIL(&chan->spies->list, spy, list); 01455 } 01456 01457 if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) { 01458 ast_cond_init(&spy->trigger, NULL); 01459 ast_set_flag(spy, CHANSPY_TRIGGER_READ); 01460 ast_clear_flag(spy, CHANSPY_TRIGGER_WRITE); 01461 } 01462 01463 if (option_debug) 01464 ast_log(LOG_DEBUG, "Spy %s added to channel %s\n", 01465 spy->type, chan->name); 01466 01467 return 0; 01468 }
void ast_channel_spy_free | ( | struct ast_channel_spy * | spy | ) |
Free a spy.
spy | The spy to free |
Definition at line 1543 of file channel.c.
References ast_cond_destroy(), ast_frfree, AST_LIST_REMOVE_HEAD, ast_mutex_destroy(), ast_test_flag, CHANSPY_DONE, CHANSPY_TRIGGER_MODE, CHANSPY_TRIGGER_NONE, f, ast_channel_spy::lock, ast_channel_spy::read_queue, ast_channel_spy::status, ast_channel_spy::trigger, and ast_channel_spy::write_queue.
Referenced by channel_spy(), and mixmonitor_thread().
01544 { 01545 struct ast_frame *f = NULL; 01546 01547 if (spy->status == CHANSPY_DONE) 01548 return; 01549 01550 /* Switch status to done in case we get called twice */ 01551 spy->status = CHANSPY_DONE; 01552 01553 /* Drop any frames in the queue */ 01554 while ((f = AST_LIST_REMOVE_HEAD(&spy->write_queue.list, frame_list))) 01555 ast_frfree(f); 01556 while ((f = AST_LIST_REMOVE_HEAD(&spy->read_queue.list, frame_list))) 01557 ast_frfree(f); 01558 01559 /* Destroy the condition if in use */ 01560 if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) 01561 ast_cond_destroy(&spy->trigger); 01562 01563 /* Destroy our mutex since it is no longer in use */ 01564 ast_mutex_destroy(&spy->lock); 01565 01566 return; 01567 }
struct ast_frame* ast_channel_spy_read_frame | ( | struct ast_channel_spy * | spy, | |
unsigned int | samples | |||
) | [read] |
Read one (or more) frames of audio from a channel being spied upon.
spy | The spy to operate on | |
samples | The number of audio samples to read |
Note: This function performs no locking; you must hold the spy's lock before calling this function. You must not hold the channel's lock at the same time.
Definition at line 4771 of file channel.c.
References ast_clear_flag, ast_codec_get_len(), ast_frame_adjust_volume(), ast_frame_slinear_sum(), AST_FRAME_VOICE, ast_frdup(), ast_frfree, AST_LIST_FIRST, AST_LIST_HEAD_SET_NOLOCK, AST_LIST_NEXT, AST_LIST_REMOVE_HEAD, AST_LIST_TRAVERSE, ast_test_flag, CHANSPY_MIXAUDIO, CHANSPY_READ_VOLADJUST, CHANSPY_TRIGGER_FLUSH, CHANSPY_WRITE_VOLADJUST, copy_data_from_queue(), ast_channel_spy_queue::format, ast_frame::frametype, ast_channel_spy::read_queue, ast_channel_spy::read_vol_adjustment, ast_channel_spy_queue::samples, ast_channel_spy::write_queue, and ast_channel_spy::write_vol_adjustment.
Referenced by mixmonitor_thread(), and spy_generate().
04772 { 04773 struct ast_frame *result; 04774 /* buffers are allocated to hold SLINEAR, which is the largest format */ 04775 short read_buf[samples]; 04776 short write_buf[samples]; 04777 struct ast_frame *read_frame; 04778 struct ast_frame *write_frame; 04779 int need_dup; 04780 struct ast_frame stack_read_frame = { .frametype = AST_FRAME_VOICE, 04781 .subclass = spy->read_queue.format, 04782 .data = read_buf, 04783 .samples = samples, 04784 .datalen = ast_codec_get_len(spy->read_queue.format, samples), 04785 }; 04786 struct ast_frame stack_write_frame = { .frametype = AST_FRAME_VOICE, 04787 .subclass = spy->write_queue.format, 04788 .data = write_buf, 04789 .samples = samples, 04790 .datalen = ast_codec_get_len(spy->write_queue.format, samples), 04791 }; 04792 04793 /* if a flush has been requested, dump everything in whichever queue is larger */ 04794 if (ast_test_flag(spy, CHANSPY_TRIGGER_FLUSH)) { 04795 if (spy->read_queue.samples > spy->write_queue.samples) { 04796 if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST)) { 04797 AST_LIST_TRAVERSE(&spy->read_queue.list, result, frame_list) 04798 ast_frame_adjust_volume(result, spy->read_vol_adjustment); 04799 } 04800 result = AST_LIST_FIRST(&spy->read_queue.list); 04801 AST_LIST_HEAD_SET_NOLOCK(&spy->read_queue.list, NULL); 04802 spy->read_queue.samples = 0; 04803 } else { 04804 if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST)) { 04805 AST_LIST_TRAVERSE(&spy->write_queue.list, result, frame_list) 04806 ast_frame_adjust_volume(result, spy->write_vol_adjustment); 04807 } 04808 result = AST_LIST_FIRST(&spy->write_queue.list); 04809 AST_LIST_HEAD_SET_NOLOCK(&spy->write_queue.list, NULL); 04810 spy->write_queue.samples = 0; 04811 } 04812 ast_clear_flag(spy, CHANSPY_TRIGGER_FLUSH); 04813 return result; 04814 } 04815 04816 if ((spy->read_queue.samples < samples) || (spy->write_queue.samples < samples)) 04817 return NULL; 04818 04819 /* short-circuit if both head frames have exactly what we want */ 04820 if ((AST_LIST_FIRST(&spy->read_queue.list)->samples == samples) && 04821 (AST_LIST_FIRST(&spy->write_queue.list)->samples == samples)) { 04822 read_frame = AST_LIST_REMOVE_HEAD(&spy->read_queue.list, frame_list); 04823 write_frame = AST_LIST_REMOVE_HEAD(&spy->write_queue.list, frame_list); 04824 04825 spy->read_queue.samples -= samples; 04826 spy->write_queue.samples -= samples; 04827 04828 need_dup = 0; 04829 } else { 04830 copy_data_from_queue(&spy->read_queue, read_buf, samples); 04831 copy_data_from_queue(&spy->write_queue, write_buf, samples); 04832 04833 read_frame = &stack_read_frame; 04834 write_frame = &stack_write_frame; 04835 need_dup = 1; 04836 } 04837 04838 if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST)) 04839 ast_frame_adjust_volume(read_frame, spy->read_vol_adjustment); 04840 04841 if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST)) 04842 ast_frame_adjust_volume(write_frame, spy->write_vol_adjustment); 04843 04844 if (ast_test_flag(spy, CHANSPY_MIXAUDIO)) { 04845 ast_frame_slinear_sum(read_frame, write_frame); 04846 04847 if (need_dup) 04848 result = ast_frdup(read_frame); 04849 else { 04850 result = read_frame; 04851 ast_frfree(write_frame); 04852 } 04853 } else { 04854 if (need_dup) { 04855 result = ast_frdup(read_frame); 04856 AST_LIST_NEXT(result, frame_list) = ast_frdup(write_frame); 04857 } else { 04858 result = read_frame; 04859 AST_LIST_NEXT(result, frame_list) = write_frame; 04860 } 04861 } 04862 04863 return result; 04864 }
void ast_channel_spy_remove | ( | struct ast_channel * | chan, | |
struct ast_channel_spy * | spy | |||
) |
Remove a spy from a channel.
chan | The channel to remove the spy from | |
spy | The spy to be removed |
Definition at line 1533 of file channel.c.
References AST_LIST_REMOVE, ast_channel::spies, spy_cleanup(), and spy_detach().
Referenced by channel_spy().
01534 { 01535 if (!chan->spies) 01536 return; 01537 01538 AST_LIST_REMOVE(&chan->spies->list, spy, list); 01539 spy_detach(spy, chan); 01540 spy_cleanup(chan); 01541 }
void ast_channel_spy_stop_by_type | ( | struct ast_channel * | chan, | |
const char * | type | |||
) |
Find all spies of a particular type on a channel and stop them.
chan | The channel to operate on | |
type | A character string identifying the type of spies to be stopped |
Definition at line 1504 of file channel.c.
References AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, CHANSPY_RUNNING, ast_channel::spies, spy_cleanup(), spy_detach(), ast_channel_spy::status, and ast_channel_spy::type.
Referenced by mixmonitor_cli(), and stop_mixmonitor_exec().
01505 { 01506 struct ast_channel_spy *spy = NULL; 01507 01508 if (!chan->spies) 01509 return; 01510 01511 AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->spies->list, spy, list) { 01512 if ((spy->type == type) && (spy->status == CHANSPY_RUNNING)) { 01513 AST_LIST_REMOVE_CURRENT(&chan->spies->list, list); 01514 spy_detach(spy, chan); 01515 } 01516 } 01517 AST_LIST_TRAVERSE_SAFE_END 01518 spy_cleanup(chan); 01519 }
void ast_channel_spy_trigger_wait | ( | struct ast_channel_spy * | spy | ) |
Efficiently wait until audio is available for a spy, or an exception occurs.
spy | The spy to wait on |
Definition at line 1521 of file channel.c.
References ast_cond_timedwait(), ast_tvadd(), ast_channel_spy::lock, and ast_channel_spy::trigger.
Referenced by mixmonitor_thread().
01522 { 01523 struct timeval tv; 01524 struct timespec ts; 01525 01526 tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000)); 01527 ts.tv_sec = tv.tv_sec; 01528 ts.tv_nsec = tv.tv_usec * 1000; 01529 01530 ast_cond_timedwait(&spy->trigger, &spy->lock, &ts); 01531 }