Mon Mar 31 07:40:47 2008

Asterisk developer's documentation


frame.c File Reference

Frame and codec manipulation routines. More...

#include "asterisk.h"
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include "asterisk/lock.h"
#include "asterisk/frame.h"
#include "asterisk/logger.h"
#include "asterisk/options.h"
#include "asterisk/channel.h"
#include "asterisk/cli.h"
#include "asterisk/term.h"
#include "asterisk/utils.h"
#include "asterisk/threadstorage.h"
#include "asterisk/linkedlists.h"
#include "asterisk/translate.h"

Include dependency graph for frame.c:

Go to the source code of this file.

Data Structures

struct  ast_codec_alias_table
struct  ast_frame_cache
struct  ast_smoother

Defines

#define FRAME_CACHE_MAX_SIZE   10
 Maximum ast_frame cache size.
#define SMOOTHER_SIZE   8000
#define TYPE_MASK   0x3

Enumerations

enum  frame_type { TYPE_HIGH, TYPE_LOW, TYPE_SILENCE, TYPE_DONTSEND }

Functions

int __ast_smoother_feed (struct ast_smoother *s, struct ast_frame *f, int swap)
char * ast_codec2str (int codec)
 Get a name from a format Gets a name from a format.
int ast_codec_choose (struct ast_codec_pref *pref, int formats, int find_best)
 Select the best audio format according to preference list from supplied options. If "find_best" is non-zero then if nothing is found, the "Best" format of the format list is selected, otherwise 0 is returned.
int ast_codec_get_len (int format, int samples)
 Returns the number of bytes for the number of samples of the given format.
int ast_codec_get_samples (struct ast_frame *f)
 Returns the number of samples contained in the frame.
int ast_codec_pref_append (struct ast_codec_pref *pref, int format)
 Append a audio codec to a preference list, removing it first if it was already there.
void ast_codec_pref_convert (struct ast_codec_pref *pref, char *buf, size_t size, int right)
 Shift an audio codec preference list up or down 65 bytes so that it becomes an ASCII string.
ast_format_list ast_codec_pref_getsize (struct ast_codec_pref *pref, int format)
 Get packet size for codec.
int ast_codec_pref_index (struct ast_codec_pref *pref, int index)
 Codec located at a particular place in the preference index See Audio Codec Preferences.
void ast_codec_pref_prepend (struct ast_codec_pref *pref, int format, int only_if_existing)
 Prepend an audio codec to a preference list, removing it first if it was already there.
void ast_codec_pref_remove (struct ast_codec_pref *pref, int format)
 Remove audio a codec from a preference list.
int ast_codec_pref_setsize (struct ast_codec_pref *pref, int format, int framems)
 Set packet size for codec.
int ast_codec_pref_string (struct ast_codec_pref *pref, char *buf, size_t size)
 Dump audio codec preference list into a string.
static const char * ast_expand_codec_alias (const char *in)
int ast_frame_adjust_volume (struct ast_frame *f, int adjustment)
 Adjusts the volume of the audio samples contained in a frame.
void ast_frame_dump (const char *name, struct ast_frame *f, char *prefix)
void ast_frame_free (struct ast_frame *fr, int cache)
 Requests a frame to be allocated Frees a frame.
static struct ast_frameast_frame_header_new (void)
int ast_frame_slinear_sum (struct ast_frame *f1, struct ast_frame *f2)
 Sums two frames of audio samples.
ast_frameast_frdup (const struct ast_frame *f)
 Copies a frame.
ast_frameast_frisolate (struct ast_frame *fr)
 Makes a frame independent of any static storage.
ast_format_listast_get_format_list (size_t *size)
ast_format_listast_get_format_list_index (int index)
int ast_getformatbyname (const char *name)
 Gets a format from a name.
char * ast_getformatname (int format)
 Get the name of a format.
char * ast_getformatname_multiple (char *buf, size_t size, int format)
 Get the names of a set of formats.
 AST_LIST_HEAD_NOLOCK (ast_frames, ast_frame)
 This is just so ast_frames, a list head struct for holding a list of ast_frame structures, is defined.
void ast_parse_allow_disallow (struct ast_codec_pref *pref, int *mask, const char *list, int allowing)
 Parse an "allow" or "deny" line in a channel or device configuration and update the capabilities mask and pref if provided. Video codecs are not added to codec preference lists, since we can not transcode.
void ast_smoother_free (struct ast_smoother *s)
int ast_smoother_get_flags (struct ast_smoother *s)
ast_smootherast_smoother_new (int size)
ast_frameast_smoother_read (struct ast_smoother *s)
void ast_smoother_reset (struct ast_smoother *s, int size)
void ast_smoother_set_flags (struct ast_smoother *s, int flags)
int ast_smoother_test_flag (struct ast_smoother *s, int flag)
void ast_swapcopy_samples (void *dst, const void *src, int samples)
 AST_THREADSTORAGE_CUSTOM (frame_cache, frame_cache_init, frame_cache_cleanup)
 A per-thread cache of frame headers.
static void frame_cache_cleanup (void *data)
static int g723_len (unsigned char buf)
static int g723_samples (unsigned char *buf, int maxlen)
static unsigned char get_n_bits_at (unsigned char *data, int n, int bit)
int init_framer (void)
static int show_codec_n (int fd, int argc, char *argv[])
static int show_codec_n_deprecated (int fd, int argc, char *argv[])
static int show_codecs (int fd, int argc, char *argv[])
static int show_codecs_deprecated (int fd, int argc, char *argv[])
static int speex_get_wb_sz_at (unsigned char *data, int len, int bit)
static int speex_samples (unsigned char *data, int len)

Variables

static struct ast_format_list AST_FORMAT_LIST []
 Definition of supported media formats (codecs).
ast_frame ast_null_frame = { AST_FRAME_NULL, }
static struct ast_cli_entry cli_show_audio_codecs
static struct ast_cli_entry cli_show_codec
static struct ast_cli_entry cli_show_codecs
static struct ast_cli_entry cli_show_image_codecs
static struct ast_cli_entry cli_show_video_codecs
static char frame_show_codec_n_usage []
static char frame_show_codecs_usage []
static struct ast_cli_entry my_clis []


Detailed Description

Frame and codec manipulation routines.

Author:
Mark Spencer <markster@digium.com>

Definition in file frame.c.


Define Documentation

#define FRAME_CACHE_MAX_SIZE   10

Maximum ast_frame cache size.

In most cases where the frame header cache will be useful, the size of the cache will stay very small. However, it is not always the case that the same thread that allocates the frame will be the one freeing them, so sometimes a thread will never have any frames in its cache, or the cache will never be pulled from. For the latter case, we limit the maximum size.

Definition at line 68 of file frame.c.

Referenced by ast_frame_free().

#define SMOOTHER_SIZE   8000

Definition at line 80 of file frame.c.

Referenced by __ast_smoother_feed().

#define TYPE_MASK   0x3

Definition at line 89 of file frame.c.

Referenced by g723_len().


Enumeration Type Documentation

enum frame_type

Enumerator:
TYPE_HIGH 
TYPE_LOW 
TYPE_SILENCE 
TYPE_DONTSEND 

Definition at line 82 of file frame.c.

00082                 {
00083    TYPE_HIGH,     /* 0x0 */
00084    TYPE_LOW,      /* 0x1 */
00085    TYPE_SILENCE,  /* 0x2 */
00086    TYPE_DONTSEND  /* 0x3 */
00087 };


Function Documentation

int __ast_smoother_feed ( struct ast_smoother s,
struct ast_frame f,
int  swap 
)

Definition at line 172 of file frame.c.

References AST_FRAME_VOICE, ast_log(), AST_MIN_OFFSET, AST_SMOOTHER_FLAG_G729, ast_swapcopy_samples(), f, LOG_NOTICE, LOG_WARNING, s, and SMOOTHER_SIZE.

00173 {
00174    if (f->frametype != AST_FRAME_VOICE) {
00175       ast_log(LOG_WARNING, "Huh?  Can't smooth a non-voice frame!\n");
00176       return -1;
00177    }
00178    if (!s->format) {
00179       s->format = f->subclass;
00180       s->samplesperbyte = (float)f->samples / (float)f->datalen;
00181    } else if (s->format != f->subclass) {
00182       ast_log(LOG_WARNING, "Smoother was working on %d format frames, now trying to feed %d?\n", s->format, f->subclass);
00183       return -1;
00184    }
00185    if (s->len + f->datalen > SMOOTHER_SIZE) {
00186       ast_log(LOG_WARNING, "Out of smoother space\n");
00187       return -1;
00188    }
00189    if (((f->datalen == s->size) || ((f->datalen < 10) && (s->flags & AST_SMOOTHER_FLAG_G729)))
00190              && !s->opt && (f->offset >= AST_MIN_OFFSET)) {
00191       if (!s->len) {
00192          /* Optimize by sending the frame we just got
00193             on the next read, thus eliminating the douple
00194             copy */
00195          if (swap)
00196             ast_swapcopy_samples(f->data, f->data, f->samples);
00197          s->opt = f;
00198          return 0;
00199       }
00200    }
00201    if (s->flags & AST_SMOOTHER_FLAG_G729) {
00202       if (s->len % 10) {
00203          ast_log(LOG_NOTICE, "Dropping extra frame of G.729 since we already have a VAD frame at the end\n");
00204          return 0;
00205       }
00206    }
00207    if (swap)
00208       ast_swapcopy_samples(s->data+s->len, f->data, f->samples);
00209    else
00210       memcpy(s->data + s->len, f->data, f->datalen);
00211    /* If either side is empty, reset the delivery time */
00212    if (!s->len || ast_tvzero(f->delivery) || ast_tvzero(s->delivery))   /* XXX really ? */
00213       s->delivery = f->delivery;
00214    s->len += f->datalen;
00215    return 0;
00216 }

char* ast_codec2str ( int  codec  ) 

Get a name from a format Gets a name from a format.

Parameters:
codec codec number (1,2,4,8,16,etc.)
Returns:
This returns a static string identifying the format on success, 0 on error.

Definition at line 599 of file frame.c.

References AST_FORMAT_LIST, and desc.

Referenced by moh_alloc(), show_codec_n(), show_codec_n_deprecated(), show_codecs(), and show_codecs_deprecated().

00600 {
00601    int x;
00602    char *ret = "unknown";
00603    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00604       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == codec) {
00605          ret = AST_FORMAT_LIST[x].desc;
00606          break;
00607       }
00608    }
00609    return ret;
00610 }

int ast_codec_choose ( struct ast_codec_pref pref,
int  formats,
int  find_best 
)

Select the best audio format according to preference list from supplied options. If "find_best" is non-zero then if nothing is found, the "Best" format of the format list is selected, otherwise 0 is returned.

Definition at line 1271 of file frame.c.

References ast_best_codec(), AST_FORMAT_AUDIO_MASK, AST_FORMAT_LIST, ast_log(), ast_format_list::bits, LOG_DEBUG, option_debug, and ast_codec_pref::order.

Referenced by __oh323_new(), gtalk_new(), process_sdp(), sip_new(), and socket_process().

01272 {
01273    int x, ret = 0, slot;
01274 
01275    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01276       slot = pref->order[x];
01277 
01278       if (!slot)
01279          break;
01280       if (formats & AST_FORMAT_LIST[slot-1].bits) {
01281          ret = AST_FORMAT_LIST[slot-1].bits;
01282          break;
01283       }
01284    }
01285    if(ret & AST_FORMAT_AUDIO_MASK)
01286       return ret;
01287 
01288    if (option_debug > 3)
01289       ast_log(LOG_DEBUG, "Could not find preferred codec - %s\n", find_best ? "Going for the best codec" : "Returning zero codec");
01290 
01291       return find_best ? ast_best_codec(formats) : 0;
01292 }

int ast_codec_get_len ( int  format,
int  samples 
)

Returns the number of bytes for the number of samples of the given format.

Definition at line 1530 of file frame.c.

References AST_FORMAT_ADPCM, AST_FORMAT_ALAW, AST_FORMAT_G722, AST_FORMAT_G726, AST_FORMAT_G726_AAL2, AST_FORMAT_G729A, AST_FORMAT_GSM, AST_FORMAT_ILBC, AST_FORMAT_SLINEAR, AST_FORMAT_ULAW, ast_getformatname(), ast_log(), len, and LOG_WARNING.

Referenced by moh_generate(), and monmp3thread().

01531 {
01532    int len = 0;
01533 
01534    /* XXX Still need speex, g723, and lpc10 XXX */ 
01535    switch(format) {
01536    case AST_FORMAT_ILBC:
01537       len = (samples / 240) * 50;
01538       break;
01539    case AST_FORMAT_GSM:
01540       len = (samples / 160) * 33;
01541       break;
01542    case AST_FORMAT_G729A:
01543       len = samples / 8;
01544       break;
01545    case AST_FORMAT_SLINEAR:
01546       len = samples * 2;
01547       break;
01548    case AST_FORMAT_ULAW:
01549    case AST_FORMAT_ALAW:
01550       len = samples;
01551       break;
01552    case AST_FORMAT_G722:
01553    case AST_FORMAT_ADPCM:
01554    case AST_FORMAT_G726:
01555    case AST_FORMAT_G726_AAL2:
01556       len = samples / 2;
01557       break;
01558    default:
01559       ast_log(LOG_WARNING, "Unable to calculate sample length for format %s\n", ast_getformatname(format));
01560    }
01561 
01562    return len;
01563 }

int ast_codec_get_samples ( struct ast_frame f  ) 

Returns the number of samples contained in the frame.

Definition at line 1487 of file frame.c.

References AST_FORMAT_ADPCM, AST_FORMAT_ALAW, AST_FORMAT_G722, AST_FORMAT_G723_1, AST_FORMAT_G726, AST_FORMAT_G726_AAL2, AST_FORMAT_G729A, AST_FORMAT_GSM, AST_FORMAT_ILBC, AST_FORMAT_LPC10, AST_FORMAT_SLINEAR, AST_FORMAT_SPEEX, AST_FORMAT_ULAW, ast_getformatname(), ast_log(), f, g723_samples(), LOG_WARNING, and speex_samples().

Referenced by ast_rtp_read(), isAnsweringMachine(), moh_generate(), schedule_delivery(), and socket_process().

01488 {
01489    int samples=0;
01490    switch(f->subclass) {
01491    case AST_FORMAT_SPEEX:
01492       samples = speex_samples(f->data, f->datalen);
01493       break;
01494    case AST_FORMAT_G723_1:
01495                 samples = g723_samples(f->data, f->datalen);
01496       break;
01497    case AST_FORMAT_ILBC:
01498       samples = 240 * (f->datalen / 50);
01499       break;
01500    case AST_FORMAT_GSM:
01501       samples = 160 * (f->datalen / 33);
01502       break;
01503    case AST_FORMAT_G729A:
01504       samples = f->datalen * 8;
01505       break;
01506    case AST_FORMAT_SLINEAR:
01507       samples = f->datalen / 2;
01508       break;
01509    case AST_FORMAT_LPC10:
01510                 /* assumes that the RTP packet contains one LPC10 frame */
01511       samples = 22 * 8;
01512       samples += (((char *)(f->data))[7] & 0x1) * 8;
01513       break;
01514    case AST_FORMAT_ULAW:
01515    case AST_FORMAT_ALAW:
01516       samples = f->datalen;
01517       break;
01518    case AST_FORMAT_G722:
01519    case AST_FORMAT_ADPCM:
01520    case AST_FORMAT_G726:
01521    case AST_FORMAT_G726_AAL2:
01522       samples = f->datalen * 2;
01523       break;
01524    default:
01525       ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(f->subclass));
01526    }
01527    return samples;
01528 }

int ast_codec_pref_append ( struct ast_codec_pref pref,
int  format 
)

Append a audio codec to a preference list, removing it first if it was already there.

Definition at line 1130 of file frame.c.

References ast_codec_pref_remove(), AST_FORMAT_LIST, and ast_codec_pref::order.

Referenced by ast_parse_allow_disallow().

01131 {
01132    int x, newindex = 0;
01133 
01134    ast_codec_pref_remove(pref, format);
01135 
01136    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01137       if(AST_FORMAT_LIST[x].bits == format) {
01138          newindex = x + 1;
01139          break;
01140       }
01141    }
01142 
01143    if(newindex) {
01144       for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01145          if(!pref->order[x]) {
01146             pref->order[x] = newindex;
01147             break;
01148          }
01149       }
01150    }
01151 
01152    return x;
01153 }

void ast_codec_pref_convert ( struct ast_codec_pref pref,
char *  buf,
size_t  size,
int  right 
)

Shift an audio codec preference list up or down 65 bytes so that it becomes an ASCII string.

Definition at line 1032 of file frame.c.

References ast_codec_pref::order.

Referenced by check_access(), create_addr(), dump_prefs(), and socket_process().

01033 {
01034    int x, differential = (int) 'A', mem;
01035    char *from, *to;
01036 
01037    if(right) {
01038       from = pref->order;
01039       to = buf;
01040       mem = size;
01041    } else {
01042       to = pref->order;
01043       from = buf;
01044       mem = 32;
01045    }
01046 
01047    memset(to, 0, mem);
01048    for (x = 0; x < 32 ; x++) {
01049       if(!from[x])
01050          break;
01051       to[x] = right ? (from[x] + differential) : (from[x] - differential);
01052    }
01053 }

struct ast_format_list ast_codec_pref_getsize ( struct ast_codec_pref pref,
int  format 
)

Get packet size for codec.

Definition at line 1232 of file frame.c.

References AST_FORMAT_LIST, ast_format_list::bits, fmt, and format.

Referenced by add_codec_to_sdp(), ast_rtp_bridge(), ast_rtp_write(), handle_open_receive_channel_ack_message(), and transmit_connect().

01233 {
01234    int x, index = -1, framems = 0;
01235    struct ast_format_list fmt = {0};
01236 
01237    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01238       if(AST_FORMAT_LIST[x].bits == format) {
01239          fmt = AST_FORMAT_LIST[x];
01240          index = x;
01241          break;
01242       }
01243    }
01244 
01245    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01246       if(pref->order[x] == (index + 1)) {
01247          framems = pref->framing[x];
01248          break;
01249       }
01250    }
01251 
01252    /* size validation */
01253    if(!framems)
01254       framems = AST_FORMAT_LIST[index].def_ms;
01255 
01256    if(AST_FORMAT_LIST[index].inc_ms && framems % AST_FORMAT_LIST[index].inc_ms) /* avoid division by zero */
01257       framems -= framems % AST_FORMAT_LIST[index].inc_ms;
01258 
01259    if(framems < AST_FORMAT_LIST[index].min_ms)
01260       framems = AST_FORMAT_LIST[index].min_ms;
01261 
01262    if(framems > AST_FORMAT_LIST[index].max_ms)
01263       framems = AST_FORMAT_LIST[index].max_ms;
01264 
01265    fmt.cur_ms = framems;
01266 
01267    return fmt;
01268 }

int ast_codec_pref_index ( struct ast_codec_pref pref,
int  index 
)

Codec located at a particular place in the preference index See Audio Codec Preferences.

Definition at line 1090 of file frame.c.

References AST_FORMAT_LIST, ast_format_list::bits, and ast_codec_pref::order.

Referenced by _sip_show_peer(), add_sdp(), ast_codec_pref_string(), function_iaxpeer(), function_sippeer(), gtalk_invite(), iax2_show_peer(), print_codec_to_cli(), and socket_process().

01091 {
01092    int slot = 0;
01093 
01094    
01095    if((index >= 0) && (index < sizeof(pref->order))) {
01096       slot = pref->order[index];
01097    }
01098 
01099    return slot ? AST_FORMAT_LIST[slot-1].bits : 0;
01100 }

void ast_codec_pref_prepend ( struct ast_codec_pref pref,
int  format,
int  only_if_existing 
)

Prepend an audio codec to a preference list, removing it first if it was already there.

Definition at line 1156 of file frame.c.

References ARRAY_LEN, AST_FORMAT_LIST, ast_codec_pref::framing, and ast_codec_pref::order.

Referenced by create_addr().

01157 {
01158    int x, newindex = 0;
01159 
01160    /* First step is to get the codecs "index number" */
01161    for (x = 0; x < ARRAY_LEN(AST_FORMAT_LIST); x++) {
01162       if (AST_FORMAT_LIST[x].bits == format) {
01163          newindex = x + 1;
01164          break;
01165       }
01166    }
01167    /* Done if its unknown */
01168    if (!newindex)
01169       return;
01170 
01171    /* Now find any existing occurrence, or the end */
01172    for (x = 0; x < 32; x++) {
01173       if (!pref->order[x] || pref->order[x] == newindex)
01174          break;
01175    }
01176 
01177    if (only_if_existing && !pref->order[x])
01178       return;
01179 
01180    /* Move down to make space to insert - either all the way to the end,
01181       or as far as the existing location (which will be overwritten) */
01182    for (; x > 0; x--) {
01183       pref->order[x] = pref->order[x - 1];
01184       pref->framing[x] = pref->framing[x - 1];
01185    }
01186 
01187    /* And insert the new entry */
01188    pref->order[0] = newindex;
01189    pref->framing[0] = 0; /* ? */
01190 }

void ast_codec_pref_remove ( struct ast_codec_pref pref,
int  format 
)

Remove audio a codec from a preference list.

Definition at line 1103 of file frame.c.

References AST_FORMAT_LIST, and ast_codec_pref::order.

Referenced by ast_codec_pref_append(), and ast_parse_allow_disallow().

01104 {
01105    struct ast_codec_pref oldorder;
01106    int x, y = 0;
01107    int slot;
01108    int size;
01109 
01110    if(!pref->order[0])
01111       return;
01112 
01113    memcpy(&oldorder, pref, sizeof(oldorder));
01114    memset(pref, 0, sizeof(*pref));
01115 
01116    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01117       slot = oldorder.order[x];
01118       size = oldorder.framing[x];
01119       if(! slot)
01120          break;
01121       if(AST_FORMAT_LIST[slot-1].bits != format) {
01122          pref->order[y] = slot;
01123          pref->framing[y++] = size;
01124       }
01125    }
01126    
01127 }

int ast_codec_pref_setsize ( struct ast_codec_pref pref,
int  format,
int  framems 
)

Set packet size for codec.

Definition at line 1193 of file frame.c.

References AST_FORMAT_LIST, ast_codec_pref::framing, and ast_codec_pref::order.

Referenced by ast_parse_allow_disallow(), and process_sdp().

01194 {
01195    int x, index = -1;
01196 
01197    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01198       if(AST_FORMAT_LIST[x].bits == format) {
01199          index = x;
01200          break;
01201       }
01202    }
01203 
01204    if(index < 0)
01205       return -1;
01206 
01207    /* size validation */
01208    if(!framems)
01209       framems = AST_FORMAT_LIST[index].def_ms;
01210 
01211    if(AST_FORMAT_LIST[index].inc_ms && framems % AST_FORMAT_LIST[index].inc_ms) /* avoid division by zero */
01212       framems -= framems % AST_FORMAT_LIST[index].inc_ms;
01213 
01214    if(framems < AST_FORMAT_LIST[index].min_ms)
01215       framems = AST_FORMAT_LIST[index].min_ms;
01216 
01217    if(framems > AST_FORMAT_LIST[index].max_ms)
01218       framems = AST_FORMAT_LIST[index].max_ms;
01219 
01220 
01221    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01222       if(pref->order[x] == (index + 1)) {
01223          pref->framing[x] = framems;
01224          break;
01225       }
01226    }
01227 
01228    return x;
01229 }

int ast_codec_pref_string ( struct ast_codec_pref pref,
char *  buf,
size_t  size 
)

Dump audio codec preference list into a string.

Definition at line 1055 of file frame.c.

References ast_codec_pref_index(), and ast_getformatname().

Referenced by dump_prefs(), and socket_process().

01056 {
01057    int x, codec; 
01058    size_t total_len, slen;
01059    char *formatname;
01060    
01061    memset(buf,0,size);
01062    total_len = size;
01063    buf[0] = '(';
01064    total_len--;
01065    for(x = 0; x < 32 ; x++) {
01066       if(total_len <= 0)
01067          break;
01068       if(!(codec = ast_codec_pref_index(pref,x)))
01069          break;
01070       if((formatname = ast_getformatname(codec))) {
01071          slen = strlen(formatname);
01072          if(slen > total_len)
01073             break;
01074          strncat(buf, formatname, total_len - 1); /* safe */
01075          total_len -= slen;
01076       }
01077       if(total_len && x < 31 && ast_codec_pref_index(pref , x + 1)) {
01078          strncat(buf, "|", total_len - 1); /* safe */
01079          total_len--;
01080       }
01081    }
01082    if(total_len) {
01083       strncat(buf, ")", total_len - 1); /* safe */
01084       total_len--;
01085    }
01086 
01087    return size - total_len;
01088 }

static const char* ast_expand_codec_alias ( const char *  in  )  [static]

Definition at line 570 of file frame.c.

Referenced by ast_getformatbyname().

00571 {
00572    int x;
00573 
00574    for (x = 0; x < sizeof(ast_codec_alias_table) / sizeof(ast_codec_alias_table[0]); x++) {
00575       if(!strcmp(in,ast_codec_alias_table[x].alias))
00576          return ast_codec_alias_table[x].realname;
00577    }
00578    return in;
00579 }

int ast_frame_adjust_volume ( struct ast_frame f,
int  adjustment 
)

Adjusts the volume of the audio samples contained in a frame.

Parameters:
f The frame containing the samples (must be AST_FRAME_VOICE and AST_FORMAT_SLINEAR)
adjustment The number of dB to adjust up or down.
Returns:
0 for success, non-zero for an error

Definition at line 1565 of file frame.c.

References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_slinear_saturated_divide(), ast_slinear_saturated_multiply(), and f.

Referenced by audiohook_read_frame_single(), and conf_run().

01566 {
01567    int count;
01568    short *fdata = f->data;
01569    short adjust_value = abs(adjustment);
01570 
01571    if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR))
01572       return -1;
01573 
01574    if (!adjustment)
01575       return 0;
01576 
01577    for (count = 0; count < f->samples; count++) {
01578       if (adjustment > 0) {
01579          ast_slinear_saturated_multiply(&fdata[count], &adjust_value);
01580       } else if (adjustment < 0) {
01581          ast_slinear_saturated_divide(&fdata[count], &adjust_value);
01582       }
01583    }
01584 
01585    return 0;
01586 }

void ast_frame_dump ( const char *  name,
struct ast_frame f,
char *  prefix 
)

Dump a frame for debugging purposes

Definition at line 753 of file frame.c.

References AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_FLASH, AST_CONTROL_HANGUP, AST_CONTROL_OFFHOOK, AST_CONTROL_OPTION, AST_CONTROL_RADIO_KEY, AST_CONTROL_RADIO_UNKEY, AST_CONTROL_RING, AST_CONTROL_RINGING, AST_CONTROL_TAKEOFFHOOK, AST_CONTROL_WINK, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_IMAGE, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_TEXT, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_getformatname(), AST_HTML_BEGIN, AST_HTML_DATA, AST_HTML_END, AST_HTML_LDCOMPLETE, AST_HTML_LINKREJECT, AST_HTML_LINKURL, AST_HTML_NOSUPPORT, AST_HTML_UNLINK, AST_HTML_URL, ast_log(), AST_MODEM_T38, AST_MODEM_V150, ast_strlen_zero(), f, and LOG_DEBUG.

Referenced by __ast_read(), ast_write(), and sip_write().

00754 {
00755    const char noname[] = "unknown";
00756    char ftype[40] = "Unknown Frametype";
00757    char subclass[40] = "Unknown Subclass";
00758    char moreinfo[40] = "";
00759 
00760    if (!name)
00761       name = noname;
00762 
00763    if (!f) {
00764       ast_log( LOG_DEBUG, "%s [ %s (NULL) ] [%s]\n", 
00765          prefix, "HANGUP", name);
00766       return;
00767    }
00768    /* XXX We should probably print one each of voice and video when the format changes XXX */
00769    if (f->frametype == AST_FRAME_VOICE)
00770       return;
00771    if (f->frametype == AST_FRAME_VIDEO)
00772       return;
00773    switch(f->frametype) {
00774    case AST_FRAME_DTMF_BEGIN:
00775       strcpy(ftype, "DTMF Begin");
00776       subclass[0] = f->subclass;
00777       subclass[1] = '\0';
00778       break;
00779    case AST_FRAME_DTMF_END:
00780       strcpy(ftype, "DTMF End");
00781       subclass[0] = f->subclass;
00782       subclass[1] = '\0';
00783       break;
00784    case AST_FRAME_CONTROL:
00785       strcpy(ftype, "Control");
00786       switch(f->subclass) {
00787       case AST_CONTROL_HANGUP:
00788          strcpy(subclass, "Hangup");
00789          break;
00790       case AST_CONTROL_RING:
00791          strcpy(subclass, "Ring");
00792          break;
00793       case AST_CONTROL_RINGING:
00794          strcpy(subclass, "Ringing");
00795          break;
00796       case AST_CONTROL_ANSWER:
00797          strcpy(subclass, "Answer");
00798          break;
00799       case AST_CONTROL_BUSY:
00800          strcpy(subclass, "Busy");
00801          break;
00802       case AST_CONTROL_TAKEOFFHOOK:
00803          strcpy(subclass, "Take Off Hook");
00804          break;
00805       case AST_CONTROL_OFFHOOK:
00806          strcpy(subclass, "Line Off Hook");
00807          break;
00808       case AST_CONTROL_CONGESTION:
00809          strcpy(subclass, "Congestion");
00810          break;
00811       case AST_CONTROL_FLASH:
00812          strcpy(subclass, "Flash");
00813          break;
00814       case AST_CONTROL_WINK:
00815          strcpy(subclass, "Wink");
00816          break;
00817       case AST_CONTROL_OPTION:
00818          strcpy(subclass, "Option");
00819          break;
00820       case AST_CONTROL_RADIO_KEY:
00821          strcpy(subclass, "Key Radio");
00822          break;
00823       case AST_CONTROL_RADIO_UNKEY:
00824          strcpy(subclass, "Unkey Radio");
00825          break;
00826       case -1:
00827          strcpy(subclass, "Stop generators");
00828          break;
00829       default:
00830          snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass);
00831       }
00832       break;
00833    case AST_FRAME_NULL:
00834       strcpy(ftype, "Null Frame");
00835       strcpy(subclass, "N/A");
00836       break;
00837    case AST_FRAME_IAX:
00838       /* Should never happen */
00839       strcpy(ftype, "IAX Specific");
00840       snprintf(subclass, sizeof(subclass), "IAX Frametype %d", f->subclass);
00841       break;
00842    case AST_FRAME_TEXT:
00843       strcpy(ftype, "Text");
00844       strcpy(subclass, "N/A");
00845       ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00846       break;
00847    case AST_FRAME_IMAGE:
00848       strcpy(ftype, "Image");
00849       snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(f->subclass));
00850       break;
00851    case AST_FRAME_HTML:
00852       strcpy(ftype, "HTML");
00853       switch(f->subclass) {
00854       case AST_HTML_URL:
00855          strcpy(subclass, "URL");
00856          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00857          break;
00858       case AST_HTML_DATA:
00859          strcpy(subclass, "Data");
00860          break;
00861       case AST_HTML_BEGIN:
00862          strcpy(subclass, "Begin");
00863          break;
00864       case AST_HTML_END:
00865          strcpy(subclass, "End");
00866          break;
00867       case AST_HTML_LDCOMPLETE:
00868          strcpy(subclass, "Load Complete");
00869          break;
00870       case AST_HTML_NOSUPPORT:
00871          strcpy(subclass, "No Support");
00872          break;
00873       case AST_HTML_LINKURL:
00874          strcpy(subclass, "Link URL");
00875          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00876          break;
00877       case AST_HTML_UNLINK:
00878          strcpy(subclass, "Unlink");
00879          break;
00880       case AST_HTML_LINKREJECT:
00881          strcpy(subclass, "Link Reject");
00882          break;
00883       default:
00884          snprintf(subclass, sizeof(subclass), "Unknown HTML frame '%d'\n", f->subclass);
00885          break;
00886       }
00887       break;
00888    case AST_FRAME_MODEM:
00889       strcpy(ftype, "Modem");
00890       switch (f->subclass) {
00891       case AST_MODEM_T38:
00892          strcpy(subclass, "T.38");
00893          break;
00894       case AST_MODEM_V150:
00895          strcpy(subclass, "V.150");
00896          break;
00897       default:
00898          snprintf(subclass, sizeof(subclass), "Unknown MODEM frame '%d'\n", f->subclass);
00899          break;
00900       }
00901       break;
00902    default:
00903       snprintf(ftype, sizeof(ftype), "Unknown Frametype '%d'", f->frametype);
00904    }
00905    if (!ast_strlen_zero(moreinfo))
00906       ast_log( LOG_DEBUG, "%s [ TYPE: %s (%d) SUBCLASS: %s (%d) '%s' ] [%s]\n",  
00907              prefix,
00908              ftype,
00909              f->frametype, 
00910              subclass,
00911              f->subclass, 
00912              moreinfo,
00913              name);
00914    else
00915       ast_log( LOG_DEBUG, "%s [ TYPE: %s (%d) SUBCLASS: %s (%d) ] [%s]\n",  
00916              prefix,
00917              ftype,
00918              f->frametype, 
00919              subclass,
00920              f->subclass, 
00921              name);
00922 }

void ast_frame_free ( struct ast_frame fr,
int  cache 
)

Requests a frame to be allocated Frees a frame.

Parameters:
fr Frame to free
cache Whether to consider this frame for frame caching

Definition at line 321 of file frame.c.

References AST_FRFLAG_FROM_TRANSLATOR, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_UNLOCK, AST_MALLOCD_DATA, AST_MALLOCD_HDR, AST_MALLOCD_SRC, ast_test_flag, ast_translate_frame_freed(), FRAME_CACHE_MAX_SIZE, frames, and free.

Referenced by mixmonitor_thread().

00322 {
00323    if( !fr )
00324        return;
00325    if (ast_test_flag(fr, AST_FRFLAG_FROM_TRANSLATOR))
00326       ast_translate_frame_freed(fr);
00327 
00328    if (!fr->mallocd)
00329       return;
00330 
00331 #if !defined(LOW_MEMORY)
00332    if (cache && fr->mallocd == AST_MALLOCD_HDR) {
00333       /* Cool, only the header is malloc'd, let's just cache those for now 
00334        * to keep things simple... */
00335       struct ast_frame_cache *frames;
00336 
00337       if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames))) 
00338           && frames->size < FRAME_CACHE_MAX_SIZE) {
00339          AST_LIST_INSERT_HEAD(&frames->list, fr, frame_list);
00340          frames->size++;
00341          return;
00342       }
00343    }
00344 #endif
00345    
00346    if (fr->mallocd & AST_MALLOCD_DATA) {
00347       if (fr->data) 
00348          free(fr->data - fr->offset);
00349    }
00350    if (fr->mallocd & AST_MALLOCD_SRC) {
00351       if (fr->src)
00352          free((char *)fr->src);
00353    }
00354    if (fr->mallocd & AST_MALLOCD_HDR) {
00355 #ifdef TRACE_FRAMES
00356       AST_LIST_LOCK(&headerlist);
00357       headers--;
00358       AST_LIST_REMOVE(&headerlist, fr, frame_list);
00359       AST_LIST_UNLOCK(&headerlist);
00360 #endif         
00361       free(fr);
00362    }
00363 }

static struct ast_frame* ast_frame_header_new ( void   )  [static]

Definition at line 273 of file frame.c.

References ast_calloc, ast_calloc_cache, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_REMOVE_HEAD, AST_LIST_UNLOCK, AST_MALLOCD_HDR, f, and frames.

Referenced by ast_frisolate().

00274 {
00275    struct ast_frame *f;
00276 
00277 #if !defined(LOW_MEMORY)
00278    struct ast_frame_cache *frames;
00279 
00280    if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
00281       if ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list))) {
00282          size_t mallocd_len = f->mallocd_hdr_len;
00283          memset(f, 0, sizeof(*f));
00284          f->mallocd_hdr_len = mallocd_len;
00285          f->mallocd = AST_MALLOCD_HDR;
00286          frames->size--;
00287          return f;
00288       }
00289    }
00290    if (!(f = ast_calloc_cache(1, sizeof(*f))))
00291       return NULL;
00292 #else
00293    if (!(f = ast_calloc(1, sizeof(*f))))
00294       return NULL;
00295 #endif
00296 
00297    f->mallocd_hdr_len = sizeof(*f);
00298 #ifdef TRACE_FRAMES
00299    AST_LIST_LOCK(&headerlist);
00300    headers++;
00301    AST_LIST_INSERT_HEAD(&headerlist, f, frame_list);
00302    AST_LIST_UNLOCK(&headerlist);
00303 #endif   
00304    
00305    return f;
00306 }

int ast_frame_slinear_sum ( struct ast_frame f1,
struct ast_frame f2 
)

Sums two frames of audio samples.

Parameters:
f1 The first frame (which will contain the result)
f2 The second frame
Returns:
0 for success, non-zero for an error
The frames must be AST_FRAME_VOICE and must contain AST_FORMAT_SLINEAR samples, and must contain the same number of samples.

Definition at line 1588 of file frame.c.

References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_slinear_saturated_add(), ast_frame::data, ast_frame::frametype, ast_frame::samples, and ast_frame::subclass.

01589 {
01590    int count;
01591    short *data1, *data2;
01592 
01593    if ((f1->frametype != AST_FRAME_VOICE) || (f1->subclass != AST_FORMAT_SLINEAR))
01594       return -1;
01595 
01596    if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass != AST_FORMAT_SLINEAR))
01597       return -1;
01598 
01599    if (f1->samples != f2->samples)
01600       return -1;
01601 
01602    for (count = 0, data1 = f1->data, data2 = f2->data;
01603         count < f1->samples;
01604         count++, data1++, data2++)
01605       ast_slinear_saturated_add(data1, data2);
01606 
01607    return 0;
01608 }

struct ast_frame* ast_frdup ( const struct ast_frame fr  ) 

Copies a frame.

Parameters:
fr frame to copy Duplicates a frame -- should only rarely be used, typically frisolate is good enough
Returns:
Returns a frame on success, NULL on error

Definition at line 428 of file frame.c.

References ast_calloc_cache, ast_copy_flags, AST_FRFLAG_HAS_TIMING_INFO, AST_FRIENDLY_OFFSET, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_MALLOCD_HDR, ast_frame::data, ast_frame::datalen, ast_frame::delivery, f, frames, ast_frame::frametype, len, ast_frame::len, ast_frame::mallocd, ast_frame::mallocd_hdr_len, ast_frame::offset, ast_frame::samples, ast_frame::seqno, ast_frame::src, ast_frame::subclass, and ast_frame::ts.

Referenced by ast_jb_put(), ast_queue_frame(), ast_rtp_write(), ast_slinfactory_feed(), audiohook_read_frame_single(), defer_frame(), recordthread(), and rpt().

00429 {
00430    struct ast_frame *out = NULL;
00431    int len, srclen = 0;
00432    void *buf = NULL;
00433 
00434 #if !defined(LOW_MEMORY)
00435    struct ast_frame_cache *frames;
00436 #endif
00437 
00438    /* Start with standard stuff */
00439    len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
00440    /* If we have a source, add space for it */
00441    /*
00442     * XXX Watch out here - if we receive a src which is not terminated
00443     * properly, we can be easily attacked. Should limit the size we deal with.
00444     */
00445    if (f->src)
00446       srclen = strlen(f->src);
00447    if (srclen > 0)
00448       len += srclen + 1;
00449    
00450 #if !defined(LOW_MEMORY)
00451    if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
00452       AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
00453          if (out->mallocd_hdr_len >= len) {
00454             size_t mallocd_len = out->mallocd_hdr_len;
00455             AST_LIST_REMOVE_CURRENT(&frames->list, frame_list);
00456             memset(out, 0, sizeof(*out));
00457             out->mallocd_hdr_len = mallocd_len;
00458             buf = out;
00459             frames->size--;
00460             break;
00461          }
00462       }
00463       AST_LIST_TRAVERSE_SAFE_END
00464    }
00465 #endif
00466 
00467    if (!buf) {
00468       if (!(buf = ast_calloc_cache(1, len)))
00469          return NULL;
00470       out = buf;
00471       out->mallocd_hdr_len = len;
00472    }
00473 
00474    out->frametype = f->frametype;
00475    out->subclass = f->subclass;
00476    out->datalen = f->datalen;
00477    out->samples = f->samples;
00478    out->delivery = f->delivery;
00479    /* Set us as having malloc'd header only, so it will eventually
00480       get freed. */
00481    out->mallocd = AST_MALLOCD_HDR;
00482    out->offset = AST_FRIENDLY_OFFSET;
00483    if (out->datalen) {
00484       out->data = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
00485       memcpy(out->data, f->data, out->datalen); 
00486    }
00487    if (srclen > 0) {
00488       out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
00489       /* Must have space since we allocated for it */
00490       strcpy((char *)out->src, f->src);
00491    }
00492    ast_copy_flags(out, f, AST_FRFLAG_HAS_TIMING_INFO);
00493    out->ts = f->ts;
00494    out->len = f->len;
00495    out->seqno = f->seqno;
00496    return out;
00497 }

struct ast_frame* ast_frisolate ( struct ast_frame fr  ) 

Makes a frame independent of any static storage.

Parameters:
fr frame to act upon Take a frame, and if it's not been malloc'd, make a malloc'd copy and if the data hasn't been malloced then make the data malloc'd. If you need to store frames, say for queueing, then you should call this function.
Returns:
Returns a frame on success, NULL on error

Definition at line 370 of file frame.c.

References ast_clear_flag, ast_copy_flags, ast_frame_header_new(), AST_FRFLAG_FROM_TRANSLATOR, AST_FRFLAG_HAS_TIMING_INFO, AST_FRIENDLY_OFFSET, ast_malloc, AST_MALLOCD_DATA, AST_MALLOCD_HDR, AST_MALLOCD_SRC, ast_strdup, ast_test_flag, ast_frame::data, ast_frame::datalen, ast_frame::frametype, free, ast_frame::len, ast_frame::mallocd, ast_frame::offset, ast_frame::samples, ast_frame::seqno, ast_frame::src, ast_frame::subclass, and ast_frame::ts.

Referenced by jpeg_read_image().

00371 {
00372    struct ast_frame *out;
00373    void *newdata;
00374 
00375    ast_clear_flag(fr, AST_FRFLAG_FROM_TRANSLATOR);
00376 
00377    if (!(fr->mallocd & AST_MALLOCD_HDR)) {
00378       /* Allocate a new header if needed */
00379       if (!(out = ast_frame_header_new()))
00380          return NULL;
00381       out->frametype = fr->frametype;
00382       out->subclass = fr->subclass;
00383       out->datalen = fr->datalen;
00384       out->samples = fr->samples;
00385       out->offset = fr->offset;
00386       out->data = fr->data;
00387       /* Copy the timing data */
00388       ast_copy_flags(out, fr, AST_FRFLAG_HAS_TIMING_INFO);
00389       if (ast_test_flag(fr, AST_FRFLAG_HAS_TIMING_INFO)) {
00390          out->ts = fr->ts;
00391          out->len = fr->len;
00392          out->seqno = fr->seqno;
00393       }
00394    } else
00395       out = fr;
00396    
00397    if (!(fr->mallocd & AST_MALLOCD_SRC)) {
00398       if (fr->src) {
00399          if (!(out->src = ast_strdup(fr->src))) {
00400             if (out != fr)
00401                free(out);
00402             return NULL;
00403          }
00404       }
00405    } else
00406       out->src = fr->src;
00407    
00408    if (!(fr->mallocd & AST_MALLOCD_DATA))  {
00409       if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) {
00410          if (out->src != fr->src)
00411             free((void *) out->src);
00412          if (out != fr)
00413             free(out);
00414          return NULL;
00415       }
00416       newdata += AST_FRIENDLY_OFFSET;
00417       out->offset = AST_FRIENDLY_OFFSET;
00418       out->datalen = fr->datalen;
00419       memcpy(newdata, fr->data, fr->datalen);
00420       out->data = newdata;
00421    }
00422 
00423    out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
00424    
00425    return out;
00426 }

struct ast_format_list* ast_get_format_list ( size_t *  size  ) 

Definition at line 515 of file frame.c.

References AST_FORMAT_LIST.

00516 {
00517    *size = (sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]));
00518    return AST_FORMAT_LIST;
00519 }

struct ast_format_list* ast_get_format_list_index ( int  index  ) 

Definition at line 510 of file frame.c.

References AST_FORMAT_LIST.

00511 {
00512    return &AST_FORMAT_LIST[index];
00513 }

int ast_getformatbyname ( const char *  name  ) 

Gets a format from a name.

Parameters:
name string of format
Returns:
This returns the form of the format in binary on success, 0 on error.

Definition at line 581 of file frame.c.

References ast_expand_codec_alias(), AST_FORMAT_LIST, and format.

Referenced by ast_parse_allow_disallow(), iax_template_parse(), load_moh_classes(), reload_config(), and try_suggested_sip_codec().

00582 {
00583    int x, all, format = 0;
00584 
00585    all = strcasecmp(name, "all") ? 0 : 1;
00586    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00587       if(AST_FORMAT_LIST[x].visible && (all || 
00588            !strcasecmp(AST_FORMAT_LIST[x].name,name) ||
00589            !strcasecmp(AST_FORMAT_LIST[x].name,ast_expand_codec_alias(name)))) {
00590          format |= AST_FORMAT_LIST[x].bits;
00591          if(!all)
00592             break;
00593       }
00594    }
00595 
00596    return format;
00597 }

char* ast_getformatname ( int  format  ) 

Get the name of a format.

Parameters:
format id of format
Returns:
A static string containing the name of the format or "unknown" if unknown.

Definition at line 521 of file frame.c.

References AST_FORMAT_LIST, ast_format_list::bits, name, and ast_format_list::visible.

Referenced by __ast_play_and_record(), __ast_read(), __ast_register_translator(), __login_exec(), _sip_show_peer(), add_codec_to_answer(), add_codec_to_sdp(), agent_call(), ast_channel_getformatname(), ast_codec_get_len(), ast_codec_get_samples(), ast_codec_pref_string(), ast_dsp_process(), ast_frame_dump(), ast_openvstream(), ast_rtp_write(), ast_slinfactory_feed(), ast_streamfile(), ast_translator_build_path(), ast_unregister_translator(), ast_writestream(), background_detect_exec(), do_waiting(), eagi_exec(), func_channel_read(), function_iaxpeer(), function_sippeer(), gtalk_show_channels(), iax2_request(), iax2_show_channels(), iax2_show_peer(), iax_show_provisioning(), moh_classes_show(), moh_release(), nv_background_detect_exec(), nv_detectfax_exec(), oh323_rtp_read(), phone_setup(), print_codec_to_cli(), rebuild_matrix(), register_translator(), set_format(), set_peer_capabilities(), show_codecs(), show_codecs_deprecated(), show_file_formats(), show_file_formats_deprecated(), show_image_formats(), show_image_formats_deprecated(), show_translation(), show_translation_deprecated(), sip_request_call(), sip_rtp_read(), socket_process(), and zt_read().

00522 {
00523    int x;
00524    char *ret = "unknown";
00525    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00526       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == format) {
00527          ret = AST_FORMAT_LIST[x].name;
00528          break;
00529       }
00530    }
00531    return ret;
00532 }

char* ast_getformatname_multiple ( char *  buf,
size_t  size,
int  format 
)

Get the names of a set of formats.

Parameters:
buf a buffer for the output string
size size of buf (bytes)
format the format (combined IDs of codecs) Prints a list of readable codec names corresponding to "format". ex: for format=AST_FORMAT_GSM|AST_FORMAT_SPEEX|AST_FORMAT_ILBC it will return "0x602 (GSM|SPEEX|ILBC)"
Returns:
The return value is buf.

Definition at line 534 of file frame.c.

References AST_FORMAT_LIST, ast_format_list::bits, len, name, and ast_format_list::visible.

Referenced by __sip_show_channels(), _sip_show_peer(), add_sdp(), ast_channel_getformatname_multiple(), ast_streamfile(), function_iaxpeer(), function_sippeer(), handle_showchan(), handle_showchan_deprecated(), iax2_show_peer(), process_sdp(), serialize_showchan(), sip_new(), sip_request_call(), sip_show_channel(), sip_show_settings(), and sip_write().

00535 {
00536    int x;
00537    unsigned len;
00538    char *start, *end = buf;
00539 
00540    if (!size)
00541       return buf;
00542    snprintf(end, size, "0x%x (", format);
00543    len = strlen(end);
00544    end += len;
00545    size -= len;
00546    start = end;
00547    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00548       if (AST_FORMAT_LIST[x].visible && (AST_FORMAT_LIST[x].bits & format)) {
00549          snprintf(end, size,"%s|",AST_FORMAT_LIST[x].name);
00550          len = strlen(end);
00551          end += len;
00552          size -= len;
00553       }
00554    }
00555    if (start == end)
00556       snprintf(start, size, "nothing)");
00557    else if (size > 1)
00558       *(end -1) = ')';
00559    return buf;
00560 }

AST_LIST_HEAD_NOLOCK ( ast_frames  ,
ast_frame   
)

This is just so ast_frames, a list head struct for holding a list of ast_frame structures, is defined.

void ast_parse_allow_disallow ( struct ast_codec_pref pref,
int *  mask,
const char *  list,
int  allowing 
)

Parse an "allow" or "deny" line in a channel or device configuration and update the capabilities mask and pref if provided. Video codecs are not added to codec preference lists, since we can not transcode.

Definition at line 1294 of file frame.c.

References ast_codec_pref_append(), ast_codec_pref_remove(), ast_codec_pref_setsize(), AST_FORMAT_AUDIO_MASK, ast_getformatbyname(), ast_log(), ast_strdupa, format, LOG_DEBUG, LOG_WARNING, option_debug, parse(), and strsep().

Referenced by build_device(), build_peer(), build_user(), gtalk_create_member(), gtalk_load_config(), reload_config(), set_config(), and update_common_options().

01295 {
01296    char *parse = NULL, *this = NULL, *psize = NULL;
01297    int format = 0, framems = 0;
01298 
01299    parse = ast_strdupa(list);
01300    while ((this = strsep(&parse, ","))) {
01301       framems = 0;
01302       if ((psize = strrchr(this, ':'))) {
01303          *psize++ = '\0';
01304          if (option_debug)
01305             ast_log(LOG_DEBUG,"Packetization for codec: %s is %s\n", this, psize);
01306          framems = atoi(psize);
01307          if (framems < 0)
01308             framems = 0;
01309       }
01310       if (!(format = ast_getformatbyname(this))) {
01311          ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", allowing ? "allow" : "disallow", this);
01312          continue;
01313       }
01314 
01315       if (mask) {
01316          if (allowing)
01317             *mask |= format;
01318          else
01319             *mask &= ~format;
01320       }
01321 
01322       /* Set up a preference list for audio. Do not include video in preferences 
01323          since we can not transcode video and have to use whatever is offered
01324        */
01325       if (pref && (format & AST_FORMAT_AUDIO_MASK)) {
01326          if (strcasecmp(this, "all")) {
01327             if (allowing) {
01328                ast_codec_pref_append(pref, format);
01329                ast_codec_pref_setsize(pref, format, framems);
01330             }
01331             else
01332                ast_codec_pref_remove(pref, format);
01333          } else if (!allowing) {
01334             memset(pref, 0, sizeof(*pref));
01335          }
01336       }
01337    }
01338 }

void ast_smoother_free ( struct ast_smoother s  ) 

Definition at line 268 of file frame.c.

References free, and s.

Referenced by ast_rtp_codec_setpref(), ast_rtp_destroy(), and ast_rtp_write().

00269 {
00270    free(s);
00271 }

int ast_smoother_get_flags ( struct ast_smoother s  ) 

Definition at line 157 of file frame.c.

References s.

00158 {
00159    return s->flags;
00160 }

struct ast_smoother* ast_smoother_new ( int  size  ) 

Definition at line 147 of file frame.c.

References ast_malloc, ast_smoother_reset(), and s.

Referenced by ast_rtp_write().

00148 {
00149    struct ast_smoother *s;
00150    if (size < 1)
00151       return NULL;
00152    if ((s = ast_malloc(sizeof(*s))))
00153       ast_smoother_reset(s, size);
00154    return s;
00155 }

struct ast_frame* ast_smoother_read ( struct ast_smoother s  ) 

Definition at line 218 of file frame.c.

References AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), AST_SMOOTHER_FLAG_G729, ast_tvadd(), len, LOG_WARNING, and s.

Referenced by ast_rtp_write().

00219 {
00220    struct ast_frame *opt;
00221    int len;
00222 
00223    /* IF we have an optimization frame, send it */
00224    if (s->opt) {
00225       if (s->opt->offset < AST_FRIENDLY_OFFSET)
00226          ast_log(LOG_WARNING, "Returning a frame of inappropriate offset (%d).\n",
00227                      s->opt->offset);
00228       opt = s->opt;
00229       s->opt = NULL;
00230       return opt;
00231    }
00232 
00233    /* Make sure we have enough data */
00234    if (s->len < s->size) {
00235       /* Or, if this is a G.729 frame with VAD on it, send it immediately anyway */
00236       if (!((s->flags & AST_SMOOTHER_FLAG_G729) && (s->size % 10)))
00237          return NULL;
00238    }
00239    len = s->size;
00240    if (len > s->len)
00241       len = s->len;
00242    /* Make frame */
00243    s->f.frametype = AST_FRAME_VOICE;
00244    s->f.subclass = s->format;
00245    s->f.data = s->framedata + AST_FRIENDLY_OFFSET;
00246    s->f.offset = AST_FRIENDLY_OFFSET;
00247    s->f.datalen = len;
00248    /* Samples will be improper given VAD, but with VAD the concept really doesn't even exist */
00249    s->f.samples = len * s->samplesperbyte;   /* XXX rounding */
00250    s->f.delivery = s->delivery;
00251    /* Fill Data */
00252    memcpy(s->f.data, s->data, len);
00253    s->len -= len;
00254    /* Move remaining data to the front if applicable */
00255    if (s->len) {
00256       /* In principle this should all be fine because if we are sending
00257          G.729 VAD, the next timestamp will take over anyawy */
00258       memmove(s->data, s->data + len, s->len);
00259       if (!ast_tvzero(s->delivery)) {
00260          /* If we have delivery time, increment it, otherwise, leave it at 0 */
00261          s->delivery = ast_tvadd(s->delivery, ast_samp2tv(s->f.samples, 8000));
00262       }
00263    }
00264    /* Return frame */
00265    return &s->f;
00266 }

void ast_smoother_reset ( struct ast_smoother s,
int  size 
)

Definition at line 141 of file frame.c.

References s.

Referenced by ast_smoother_new().

00142 {
00143    memset(s, 0, sizeof(*s));
00144    s->size = size;
00145 }

void ast_smoother_set_flags ( struct ast_smoother s,
int  flags 
)

Definition at line 162 of file frame.c.

References s.

Referenced by ast_rtp_write().

00163 {
00164    s->flags = flags;
00165 }

int ast_smoother_test_flag ( struct ast_smoother s,
int  flag 
)

Definition at line 167 of file frame.c.

References s.

Referenced by ast_rtp_write().

00168 {
00169    return (s->flags & flag);
00170 }

void ast_swapcopy_samples ( void *  dst,
const void *  src,
int  samples 
)

Definition at line 499 of file frame.c.

Referenced by __ast_smoother_feed(), iax_frame_wrap(), and phone_write_buf().

00500 {
00501    int i;
00502    unsigned short *dst_s = dst;
00503    const unsigned short *src_s = src;
00504 
00505    for (i = 0; i < samples; i++)
00506       dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
00507 }

AST_THREADSTORAGE_CUSTOM ( frame_cache  ,
frame_cache_init  ,
frame_cache_cleanup   
)

A per-thread cache of frame headers.

static void frame_cache_cleanup ( void *  data  )  [static]

Definition at line 309 of file frame.c.

References AST_LIST_REMOVE_HEAD, f, frames, and free.

00310 {
00311    struct ast_frame_cache *frames = data;
00312    struct ast_frame *f;
00313 
00314    while ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list)))
00315       free(f);
00316    
00317    free(frames);
00318 }

static int g723_len ( unsigned char  buf  )  [static]

Definition at line 1340 of file frame.c.

References ast_log(), LOG_WARNING, type, TYPE_HIGH, TYPE_LOW, TYPE_MASK, and TYPE_SILENCE.

Referenced by g723_samples().

01341 {
01342    enum frame_type type = buf & TYPE_MASK;
01343 
01344    switch(type) {
01345    case TYPE_DONTSEND:
01346       return 0;
01347       break;
01348    case TYPE_SILENCE:
01349       return 4;
01350       break;
01351    case TYPE_HIGH:
01352       return 24;
01353       break;
01354    case TYPE_LOW:
01355       return 20;
01356       break;
01357    default:
01358       ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", type);
01359    }
01360    return -1;
01361 }

static int g723_samples ( unsigned char *  buf,
int  maxlen 
) [static]

Definition at line 1363 of file frame.c.

References g723_len().

Referenced by ast_codec_get_samples().

01364 {
01365    int pos = 0;
01366    int samples = 0;
01367    int res;
01368    while(pos < maxlen) {
01369       res = g723_len(buf[pos]);
01370       if (res <= 0)
01371          break;
01372       samples += 240;
01373       pos += res;
01374    }
01375    return samples;
01376 }

static unsigned char get_n_bits_at ( unsigned char *  data,
int  n,
int  bit 
) [static]

Definition at line 1378 of file frame.c.

Referenced by speex_get_wb_sz_at(), and speex_samples().

01379 {
01380    int byte = bit / 8;       /* byte containing first bit */
01381    int rem = 8 - (bit % 8);  /* remaining bits in first byte */
01382    unsigned char ret = 0;
01383    
01384    if (n <= 0 || n > 8)
01385       return 0;
01386 
01387    if (rem < n) {
01388       ret = (data[byte] << (n - rem));
01389       ret |= (data[byte + 1] >> (8 - n + rem));
01390    } else {
01391       ret = (data[byte] >> (rem - n));
01392    }
01393 
01394    return (ret & (0xff >> (8 - n)));
01395 }

int init_framer ( void   ) 

Provided by frame.c

Definition at line 1026 of file frame.c.

References ast_cli_register_multiple(), and my_clis.

Referenced by main().

01027 {
01028    ast_cli_register_multiple(my_clis, sizeof(my_clis) / sizeof(struct ast_cli_entry));
01029    return 0;   
01030 }

static int show_codec_n ( int  fd,
int  argc,
char *  argv[] 
) [static]

Definition at line 726 of file frame.c.

References ast_cli(), ast_codec2str(), RESULT_SHOWUSAGE, and RESULT_SUCCESS.

00727 {
00728    int codec, i, found=0;
00729 
00730    if (argc != 4)
00731       return RESULT_SHOWUSAGE;
00732 
00733    if (sscanf(argv[3],"%d",&codec) != 1)
00734       return RESULT_SHOWUSAGE;
00735 
00736    for (i = 0; i < 32; i++)
00737       if (codec & (1 << i)) {
00738          found = 1;
00739          ast_cli(fd, "%11u (1 << %2d)  %s\n",1 << i,i,ast_codec2str(1<<i));
00740       }
00741 
00742    if (!found)
00743       ast_cli(fd, "Codec %d not found\n", codec);
00744 
00745    return RESULT_SUCCESS;
00746 }

static int show_codec_n_deprecated ( int  fd,
int  argc,
char *  argv[] 
) [static]

Definition at line 704 of file frame.c.

References ast_cli(), ast_codec2str(), RESULT_SHOWUSAGE, and RESULT_SUCCESS.

00705 {
00706    int codec, i, found=0;
00707 
00708    if (argc != 3)
00709       return RESULT_SHOWUSAGE;
00710 
00711    if (sscanf(argv[2],"%d",&codec) != 1)
00712       return RESULT_SHOWUSAGE;
00713 
00714    for (i = 0; i < 32; i++)
00715       if (codec & (1 << i)) {
00716          found = 1;
00717          ast_cli(fd, "%11u (1 << %2d)  %s\n",1 << i,i,ast_codec2str(1<<i));
00718       }
00719 
00720    if (!found)
00721       ast_cli(fd, "Codec %d not found\n", codec);
00722 
00723    return RESULT_SUCCESS;
00724 }

static int show_codecs ( int  fd,
int  argc,
char *  argv[] 
) [static]

Definition at line 656 of file frame.c.

References ast_cli(), ast_codec2str(), ast_getformatname(), ast_opt_dont_warn, RESULT_SHOWUSAGE, and RESULT_SUCCESS.

00657 {
00658    int i, found=0;
00659    char hex[25];
00660    
00661    if ((argc < 3) || (argc > 4))
00662       return RESULT_SHOWUSAGE;
00663 
00664    if (!ast_opt_dont_warn)
00665       ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n"
00666             "\tIt does not indicate anything about your configuration.\n");
00667 
00668    ast_cli(fd, "%11s %9s %10s   TYPE   %8s   %s\n","INT","BINARY","HEX","NAME","DESC");
00669    ast_cli(fd, "--------------------------------------------------------------------------------\n");
00670    if ((argc == 3) || (!strcasecmp(argv[3],"audio"))) {
00671       found = 1;
00672       for (i=0;i<13;i++) {
00673          snprintf(hex,25,"(0x%x)",1<<i);
00674          ast_cli(fd, "%11u (1 << %2d) %10s  audio   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00675       }
00676    }
00677 
00678    if ((argc == 3) || (!strcasecmp(argv[3],"image"))) {
00679       found = 1;
00680       for (i=16;i<18;i++) {
00681          snprintf(hex,25,"(0x%x)",1<<i);
00682          ast_cli(fd, "%11u (1 << %2d) %10s  image   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00683       }
00684    }
00685 
00686    if ((argc == 3) || (!strcasecmp(argv[3],"video"))) {
00687       found = 1;
00688       for (i=18;i<22;i++) {
00689          snprintf(hex,25,"(0x%x)",1<<i);
00690          ast_cli(fd, "%11u (1 << %2d) %10s  video   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00691       }
00692    }
00693 
00694    if (! found)
00695       return RESULT_SHOWUSAGE;
00696    else
00697       return RESULT_SUCCESS;
00698 }

static int show_codecs_deprecated ( int  fd,
int  argc,
char *  argv[] 
) [static]

Definition at line 612 of file frame.c.

References ast_cli(), ast_codec2str(), ast_getformatname(), ast_opt_dont_warn, RESULT_SHOWUSAGE, and RESULT_SUCCESS.

00613 {
00614    int i, found=0;
00615    char hex[25];
00616    
00617    if ((argc < 2) || (argc > 3))
00618       return RESULT_SHOWUSAGE;
00619 
00620    if (!ast_opt_dont_warn)
00621       ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n"
00622             "\tIt does not indicate anything about your configuration.\n");
00623 
00624    ast_cli(fd, "%11s %9s %10s   TYPE   %8s   %s\n","INT","BINARY","HEX","NAME","DESC");
00625    ast_cli(fd, "--------------------------------------------------------------------------------\n");
00626    if ((argc == 2) || (!strcasecmp(argv[1],"audio"))) {
00627       found = 1;
00628       for (i=0;i<13;i++) {
00629          snprintf(hex,25,"(0x%x)",1<<i);
00630          ast_cli(fd, "%11u (1 << %2d) %10s  audio   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00631       }
00632    }
00633 
00634    if ((argc == 2) || (!strcasecmp(argv[1],"image"))) {
00635       found = 1;
00636       for (i=16;i<18;i++) {
00637          snprintf(hex,25,"(0x%x)",1<<i);
00638          ast_cli(fd, "%11u (1 << %2d) %10s  image   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00639       }
00640    }
00641 
00642    if ((argc == 2) || (!strcasecmp(argv[1],"video"))) {
00643       found = 1;
00644       for (i=18;i<22;i++) {
00645          snprintf(hex,25,"(0x%x)",1<<i);
00646          ast_cli(fd, "%11u (1 << %2d) %10s  video   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00647       }
00648    }
00649 
00650    if (! found)
00651       return RESULT_SHOWUSAGE;
00652    else
00653       return RESULT_SUCCESS;
00654 }

static int speex_get_wb_sz_at ( unsigned char *  data,
int  len,
int  bit 
) [static]

Definition at line 1397 of file frame.c.

References ast_log(), get_n_bits_at(), and LOG_WARNING.

Referenced by speex_samples().

01398 {
01399    static int SpeexWBSubModeSz[] = {
01400       0, 36, 112, 192,
01401       352, 0, 0, 0 };
01402    int off = bit;
01403    unsigned char c;
01404 
01405    /* skip up to two wideband frames */
01406    if (((len * 8 - off) >= 5) && 
01407       get_n_bits_at(data, 1, off)) {
01408       c = get_n_bits_at(data, 3, off + 1);
01409       off += SpeexWBSubModeSz[c];
01410 
01411       if (((len * 8 - off) >= 5) && 
01412          get_n_bits_at(data, 1, off)) {
01413          c = get_n_bits_at(data, 3, off + 1);
01414          off += SpeexWBSubModeSz[c];
01415 
01416          if (((len * 8 - off) >= 5) && 
01417             get_n_bits_at(data, 1, off)) {
01418             ast_log(LOG_WARNING, "Encountered corrupt speex frame; too many wideband frames in a row.\n");
01419             return -1;
01420          }
01421       }
01422 
01423    }
01424    return off - bit;
01425 }

static int speex_samples ( unsigned char *  data,
int  len 
) [static]

Definition at line 1427 of file frame.c.

References ast_log(), get_n_bits_at(), LOG_WARNING, and speex_get_wb_sz_at().

Referenced by ast_codec_get_samples().

01428 {
01429    static int SpeexSubModeSz[] = {
01430                5, 43, 119, 160,
01431       220, 300, 364, 492, 
01432       79, 0, 0, 0,
01433       0, 0, 0, 0 };
01434    static int SpeexInBandSz[] = { 
01435       1, 1, 4, 4,
01436       4, 4, 4, 4,
01437       8, 8, 16, 16,
01438       32, 32, 64, 64 };
01439    int bit = 0;
01440    int cnt = 0;
01441    int off;
01442    unsigned char c;
01443 
01444    while ((len * 8 - bit) >= 5) {
01445       /* skip wideband frames */
01446       off = speex_get_wb_sz_at(data, len, bit);
01447       if (off < 0)  {
01448          ast_log(LOG_WARNING, "Had error while reading wideband frames for speex samples\n");
01449          break;
01450       }
01451       bit += off;
01452 
01453       if ((len * 8 - bit) < 5) {
01454          ast_log(LOG_WARNING, "Not enough bits remaining after wide band for speex samples.\n");
01455          break;
01456       }
01457 
01458       /* get control bits */
01459       c = get_n_bits_at(data, 5, bit);
01460       bit += 5;
01461 
01462       if (c == 15) { 
01463          /* terminator */
01464          break; 
01465       } else if (c == 14) {
01466          /* in-band signal; next 4 bits contain signal id */
01467          c = get_n_bits_at(data, 4, bit);
01468          bit += 4;
01469          bit += SpeexInBandSz[c];
01470       } else if (c == 13) {
01471          /* user in-band; next 5 bits contain msg len */
01472          c = get_n_bits_at(data, 5, bit);
01473          bit += 5;
01474          bit += c * 8;
01475       } else if (c > 8) {
01476          /* unknown */
01477          break;
01478       } else {
01479          /* skip number bits for submode (less the 5 control bits) */
01480          bit += SpeexSubModeSz[c] - 5;
01481          cnt += 160; /* new frame */
01482       }
01483    }
01484    return cnt;
01485 }


Variable Documentation

struct ast_format_list AST_FORMAT_LIST[] [static]

Definition of supported media formats (codecs).

Definition at line 107 of file frame.c.

Referenced by ast_codec2str(), ast_codec_choose(), ast_codec_pref_append(), ast_codec_pref_getsize(), ast_codec_pref_index(), ast_codec_pref_prepend(), ast_codec_pref_remove(), ast_codec_pref_setsize(), ast_get_format_list(), ast_get_format_list_index(), ast_getformatbyname(), ast_getformatname(), and ast_getformatname_multiple().

struct ast_frame ast_null_frame = { AST_FRAME_NULL, }

Queueing a null frame is fairly common, so we declare a global null frame object for this purpose instead of having to declare one on the stack

Definition at line 139 of file frame.c.

Referenced by __ast_read(), __oh323_rtp_create(), __oh323_update_info(), agent_new(), agent_read(), ast_channel_masquerade(), ast_channel_setwhentohangup(), ast_do_masquerade(), ast_rtcp_read(), ast_rtp_read(), ast_softhangup_nolock(), ast_udptl_read(), conf_run(), features_read(), gtalk_rtp_read(), handle_request_invite(), handle_response_invite(), iax2_read(), local_read(), mgcp_rtp_read(), oh323_read(), oh323_rtp_read(), process_rfc2833(), process_sdp(), send_dtmf(), sip_rtp_read(), skinny_rtp_read(), and wakeup_sub().

struct ast_cli_entry cli_show_audio_codecs [static]

Initial value:

 {
   { "show", "audio", "codecs", NULL },
   show_codecs_deprecated, NULL,
   NULL }

Definition at line 971 of file frame.c.

struct ast_cli_entry cli_show_codec [static]

Initial value:

 {
   { "show", "codec", NULL },
   show_codec_n_deprecated, NULL,
   NULL }

Definition at line 986 of file frame.c.

struct ast_cli_entry cli_show_codecs [static]

Initial value:

 {
   { "show", "codecs", NULL },
   show_codecs_deprecated, NULL,
   NULL }

Definition at line 966 of file frame.c.

struct ast_cli_entry cli_show_image_codecs [static]

Initial value:

 {
   { "show", "image", "codecs", NULL },
   show_codecs_deprecated, NULL,
   NULL }

Definition at line 981 of file frame.c.

struct ast_cli_entry cli_show_video_codecs [static]

Initial value:

 {
   { "show", "video", "codecs", NULL },
   show_codecs_deprecated, NULL,
   NULL }

Definition at line 976 of file frame.c.

char frame_show_codec_n_usage[] [static]

Initial value:

"Usage: core show codec <number>\n"
"       Displays codec mapping\n"

Definition at line 748 of file frame.c.

char frame_show_codecs_usage[] [static]

Initial value:

"Usage: core show codecs [audio|video|image]\n"
"       Displays codec mapping\n"

Definition at line 700 of file frame.c.

struct ast_cli_entry my_clis[] [static]

Definition at line 998 of file frame.c.

Referenced by init_framer(), load_module(), and unload_module().


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