#include "asterisk/linkedlists.h"
Include dependency graph for chanspy.h:
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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. | |
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 965 of file channel.c.
References 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, calloc, 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, list, LOG_DEBUG, LOG_WARNING, ast_channel::name, 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().
00966 { 00967 /* Link the owner channel to the spy */ 00968 spy->chan = chan; 00969 00970 if (!ast_test_flag(spy, CHANSPY_FORMAT_AUDIO)) { 00971 ast_log(LOG_WARNING, "Could not add channel spy '%s' to channel '%s', only audio format spies are supported.\n", 00972 spy->type, chan->name); 00973 return -1; 00974 } 00975 00976 if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST) && (spy->read_queue.format != AST_FORMAT_SLINEAR)) { 00977 ast_log(LOG_WARNING, "Cannot provide volume adjustment on '%s' format spies\n", 00978 ast_getformatname(spy->read_queue.format)); 00979 return -1; 00980 } 00981 00982 if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST) && (spy->write_queue.format != AST_FORMAT_SLINEAR)) { 00983 ast_log(LOG_WARNING, "Cannot provide volume adjustment on '%s' format spies\n", 00984 ast_getformatname(spy->write_queue.format)); 00985 return -1; 00986 } 00987 00988 if (ast_test_flag(spy, CHANSPY_MIXAUDIO) && 00989 ((spy->read_queue.format != AST_FORMAT_SLINEAR) || 00990 (spy->write_queue.format != AST_FORMAT_SLINEAR))) { 00991 ast_log(LOG_WARNING, "Cannot provide audio mixing on '%s'-'%s' format spies\n", 00992 ast_getformatname(spy->read_queue.format), ast_getformatname(spy->write_queue.format)); 00993 return -1; 00994 } 00995 00996 if (!chan->spies) { 00997 if (!(chan->spies = calloc(1, sizeof(*chan->spies)))) { 00998 ast_log(LOG_WARNING, "Memory allocation failure\n"); 00999 return -1; 01000 } 01001 01002 AST_LIST_HEAD_INIT_NOLOCK(&chan->spies->list); 01003 AST_LIST_INSERT_HEAD(&chan->spies->list, spy, list); 01004 } else { 01005 AST_LIST_INSERT_TAIL(&chan->spies->list, spy, list); 01006 } 01007 01008 if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) { 01009 ast_cond_init(&spy->trigger, NULL); 01010 ast_set_flag(spy, CHANSPY_TRIGGER_READ); 01011 ast_clear_flag(spy, CHANSPY_TRIGGER_WRITE); 01012 } 01013 01014 ast_log(LOG_DEBUG, "Spy %s added to channel %s\n", 01015 spy->type, chan->name); 01016 01017 return 0; 01018 }
void ast_channel_spy_free | ( | struct ast_channel_spy * | spy | ) |
Free a spy.
spy | The spy to free |
Definition at line 1098 of file channel.c.
References ast_cond_destroy(), ast_frfree(), ast_mutex_destroy(), ast_test_flag, CHANSPY_DONE, CHANSPY_TRIGGER_MODE, CHANSPY_TRIGGER_NONE, ast_channel_spy_queue::head, ast_channel_spy::lock, ast_frame::next, 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().
01099 { 01100 struct ast_frame *f = NULL; 01101 01102 if (spy->status == CHANSPY_DONE) 01103 return; 01104 01105 /* Switch status to done in case we get called twice */ 01106 spy->status = CHANSPY_DONE; 01107 01108 /* Drop any frames in the queue */ 01109 for (f = spy->write_queue.head; f; f = spy->write_queue.head) { 01110 spy->write_queue.head = f->next; 01111 ast_frfree(f); 01112 } 01113 for (f = spy->read_queue.head; f; f= spy->read_queue.head) { 01114 spy->read_queue.head = f->next; 01115 ast_frfree(f); 01116 } 01117 01118 /* Destroy the condition if in use */ 01119 if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) 01120 ast_cond_destroy(&spy->trigger); 01121 01122 /* Destroy our mutex since it is no longer in use */ 01123 ast_mutex_destroy(&spy->lock); 01124 01125 return; 01126 }
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.
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 3975 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_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_queue::head, ast_frame::next, ast_channel_spy::read_queue, ast_channel_spy::read_vol_adjustment, result, ast_frame::samples, ast_channel_spy_queue::samples, ast_channel_spy::write_queue, and ast_channel_spy::write_vol_adjustment.
Referenced by mixmonitor_thread(), and spy_generate().
03976 { 03977 struct ast_frame *result; 03978 /* buffers are allocated to hold SLINEAR, which is the largest format */ 03979 short read_buf[samples]; 03980 short write_buf[samples]; 03981 struct ast_frame *read_frame; 03982 struct ast_frame *write_frame; 03983 int need_dup; 03984 struct ast_frame stack_read_frame = { .frametype = AST_FRAME_VOICE, 03985 .subclass = spy->read_queue.format, 03986 .data = read_buf, 03987 .samples = samples, 03988 .datalen = ast_codec_get_len(spy->read_queue.format, samples), 03989 }; 03990 struct ast_frame stack_write_frame = { .frametype = AST_FRAME_VOICE, 03991 .subclass = spy->write_queue.format, 03992 .data = write_buf, 03993 .samples = samples, 03994 .datalen = ast_codec_get_len(spy->write_queue.format, samples), 03995 }; 03996 03997 /* if a flush has been requested, dump everything in whichever queue is larger */ 03998 if (ast_test_flag(spy, CHANSPY_TRIGGER_FLUSH)) { 03999 if (spy->read_queue.samples > spy->write_queue.samples) { 04000 if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST)) { 04001 for (result = spy->read_queue.head; result; result = result->next) 04002 ast_frame_adjust_volume(result, spy->read_vol_adjustment); 04003 } 04004 result = spy->read_queue.head; 04005 spy->read_queue.head = NULL; 04006 spy->read_queue.samples = 0; 04007 ast_clear_flag(spy, CHANSPY_TRIGGER_FLUSH); 04008 return result; 04009 } else { 04010 if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST)) { 04011 for (result = spy->write_queue.head; result; result = result->next) 04012 ast_frame_adjust_volume(result, spy->write_vol_adjustment); 04013 } 04014 result = spy->write_queue.head; 04015 spy->write_queue.head = NULL; 04016 spy->write_queue.samples = 0; 04017 ast_clear_flag(spy, CHANSPY_TRIGGER_FLUSH); 04018 return result; 04019 } 04020 } 04021 04022 if ((spy->read_queue.samples < samples) || (spy->write_queue.samples < samples)) 04023 return NULL; 04024 04025 /* short-circuit if both head frames have exactly what we want */ 04026 if ((spy->read_queue.head->samples == samples) && 04027 (spy->write_queue.head->samples == samples)) { 04028 read_frame = spy->read_queue.head; 04029 spy->read_queue.head = read_frame->next; 04030 read_frame->next = NULL; 04031 04032 write_frame = spy->write_queue.head; 04033 spy->write_queue.head = write_frame->next; 04034 write_frame->next = NULL; 04035 04036 spy->read_queue.samples -= samples; 04037 spy->write_queue.samples -= samples; 04038 04039 need_dup = 0; 04040 } else { 04041 copy_data_from_queue(&spy->read_queue, read_buf, samples); 04042 copy_data_from_queue(&spy->write_queue, write_buf, samples); 04043 04044 read_frame = &stack_read_frame; 04045 write_frame = &stack_write_frame; 04046 need_dup = 1; 04047 } 04048 04049 if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST)) 04050 ast_frame_adjust_volume(read_frame, spy->read_vol_adjustment); 04051 04052 if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST)) 04053 ast_frame_adjust_volume(write_frame, spy->write_vol_adjustment); 04054 04055 if (ast_test_flag(spy, CHANSPY_MIXAUDIO)) { 04056 ast_frame_slinear_sum(read_frame, write_frame); 04057 04058 if (need_dup) 04059 result = ast_frdup(read_frame); 04060 else { 04061 result = read_frame; 04062 ast_frfree(write_frame); 04063 } 04064 } else { 04065 if (need_dup) { 04066 result = ast_frdup(read_frame); 04067 result->next = ast_frdup(write_frame); 04068 } else { 04069 result = read_frame; 04070 result->next = write_frame; 04071 } 04072 } 04073 04074 return result; 04075 }
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 1087 of file channel.c.
References AST_LIST_REMOVE, list, ast_channel::spies, spy_cleanup(), and spy_detach().
Referenced by channel_spy().
01088 { 01089 if (!chan->spies) 01090 return; 01091 01092 AST_LIST_REMOVE(&chan->spies->list, spy, list); 01093 01094 spy_detach(spy, chan); 01095 spy_cleanup(chan); 01096 }
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 1055 of file channel.c.
References AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, ast_mutex_lock(), ast_mutex_unlock(), ast_channel_spy::chan, CHANSPY_RUNNING, list, ast_channel_spy::lock, ast_channel::spies, spy_cleanup(), spy_detach(), ast_channel_spy::status, and ast_channel_spy::type.
Referenced by mixmonitor_cli().
01056 { 01057 struct ast_channel_spy *spy = NULL; 01058 01059 if (!chan->spies) 01060 return; 01061 01062 AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->spies->list, spy, list) { 01063 ast_mutex_lock(&spy->lock); 01064 if ((spy->type == type) && (spy->status == CHANSPY_RUNNING)) { 01065 ast_mutex_unlock(&spy->lock); 01066 AST_LIST_REMOVE_CURRENT(&chan->spies->list, list); 01067 spy_detach(spy, chan); 01068 } else 01069 ast_mutex_unlock(&spy->lock); 01070 } 01071 AST_LIST_TRAVERSE_SAFE_END 01072 spy_cleanup(chan); 01073 }
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 1075 of file channel.c.
References ast_cond_timedwait(), ast_tvadd(), ast_channel_spy::lock, and ast_channel_spy::trigger.
Referenced by mixmonitor_thread().
01076 { 01077 struct timeval tv; 01078 struct timespec ts; 01079 01080 tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000)); 01081 ts.tv_sec = tv.tv_sec; 01082 ts.tv_nsec = tv.tv_usec * 1000; 01083 01084 ast_cond_timedwait(&spy->trigger, &spy->lock, &ts); 01085 }