Thu May 14 15:13:32 2009

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 "asterisk/dsp.h"
#include "asterisk/file.h"

Go to the source code of this file.

Data Structures

struct  ast_codec_alias_table
struct  ast_frame_cache
struct  ast_frames
 This is just so ast_frames, a list head struct for holding a list of ast_frame structures, is defined. More...
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.
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_reconfigure (struct ast_smoother *s, int bytes)
 Reconfigure an existing smoother to output a different number of bytes per frame.
void ast_smoother_reset (struct ast_smoother *s, int bytes)
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)
static void frame_cache_cleanup (void *data)
static void frame_cache_init (void)
 A per-thread cache of frame headers.
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 smoother_frame_feed (struct ast_smoother *s, struct ast_frame *f, int swap)
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 struct ast_threadstorage frame_cache = { .once = PTHREAD_ONCE_INIT, .key_init = frame_cache_init , }
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 70 of file frame.c.

Referenced by ast_frame_free(), and iax_frame_free().

#define SMOOTHER_SIZE   8000

Definition at line 82 of file frame.c.

Referenced by __ast_smoother_feed().

#define TYPE_MASK   0x3

Definition at line 91 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 84 of file frame.c.

00084                 {
00085    TYPE_HIGH,     /* 0x0 */
00086    TYPE_LOW,      /* 0x1 */
00087    TYPE_SILENCE,  /* 0x2 */
00088    TYPE_DONTSEND  /* 0x3 */
00089 };


Function Documentation

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

Definition at line 216 of file frame.c.

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

00217 {
00218    if (f->frametype != AST_FRAME_VOICE) {
00219       ast_log(LOG_WARNING, "Huh?  Can't smooth a non-voice frame!\n");
00220       return -1;
00221    }
00222    if (!s->format) {
00223       s->format = f->subclass;
00224       s->samplesperbyte = (float)f->samples / (float)f->datalen;
00225    } else if (s->format != f->subclass) {
00226       ast_log(LOG_WARNING, "Smoother was working on %d format frames, now trying to feed %d?\n", s->format, f->subclass);
00227       return -1;
00228    }
00229    if (s->len + f->datalen > SMOOTHER_SIZE) {
00230       ast_log(LOG_WARNING, "Out of smoother space\n");
00231       return -1;
00232    }
00233    if (((f->datalen == s->size) ||
00234         ((f->datalen < 10) && (s->flags & AST_SMOOTHER_FLAG_G729))) &&
00235        !s->opt &&
00236        !s->len &&
00237        (f->offset >= AST_MIN_OFFSET)) {
00238       /* Optimize by sending the frame we just got
00239          on the next read, thus eliminating the douple
00240          copy */
00241       if (swap)
00242          ast_swapcopy_samples(f->data, f->data, f->samples);
00243       s->opt = f;
00244       s->opt_needs_swap = swap ? 1 : 0;
00245       return 0;
00246    }
00247 
00248    return smoother_frame_feed(s, f, swap);
00249 }

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 639 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().

00640 {
00641    int x;
00642    char *ret = "unknown";
00643    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00644       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == codec) {
00645          ret = AST_FORMAT_LIST[x].desc;
00646          break;
00647       }
00648    }
00649    return ret;
00650 }

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 1314 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().

01315 {
01316    int x, ret = 0, slot;
01317 
01318    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01319       slot = pref->order[x];
01320 
01321       if (!slot)
01322          break;
01323       if (formats & AST_FORMAT_LIST[slot-1].bits) {
01324          ret = AST_FORMAT_LIST[slot-1].bits;
01325          break;
01326       }
01327    }
01328    if(ret & AST_FORMAT_AUDIO_MASK)
01329       return ret;
01330 
01331    if (option_debug > 3)
01332       ast_log(LOG_DEBUG, "Could not find preferred codec - %s\n", find_best ? "Going for the best codec" : "Returning zero codec");
01333 
01334       return find_best ? ast_best_codec(formats) : 0;
01335 }

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 1573 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().

01574 {
01575    int len = 0;
01576 
01577    /* XXX Still need speex, g723, and lpc10 XXX */ 
01578    switch(format) {
01579    case AST_FORMAT_ILBC:
01580       len = (samples / 240) * 50;
01581       break;
01582    case AST_FORMAT_GSM:
01583       len = (samples / 160) * 33;
01584       break;
01585    case AST_FORMAT_G729A:
01586       len = samples / 8;
01587       break;
01588    case AST_FORMAT_SLINEAR:
01589       len = samples * 2;
01590       break;
01591    case AST_FORMAT_ULAW:
01592    case AST_FORMAT_ALAW:
01593       len = samples;
01594       break;
01595    case AST_FORMAT_G722:
01596    case AST_FORMAT_ADPCM:
01597    case AST_FORMAT_G726:
01598    case AST_FORMAT_G726_AAL2:
01599       len = samples / 2;
01600       break;
01601    default:
01602       ast_log(LOG_WARNING, "Unable to calculate sample length for format %s\n", ast_getformatname(format));
01603    }
01604 
01605    return len;
01606 }

int ast_codec_get_samples ( struct ast_frame f  ) 

Returns the number of samples contained in the frame.

Definition at line 1530 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().

01531 {
01532    int samples=0;
01533    switch(f->subclass) {
01534    case AST_FORMAT_SPEEX:
01535       samples = speex_samples(f->data, f->datalen);
01536       break;
01537    case AST_FORMAT_G723_1:
01538                 samples = g723_samples(f->data, f->datalen);
01539       break;
01540    case AST_FORMAT_ILBC:
01541       samples = 240 * (f->datalen / 50);
01542       break;
01543    case AST_FORMAT_GSM:
01544       samples = 160 * (f->datalen / 33);
01545       break;
01546    case AST_FORMAT_G729A:
01547       samples = f->datalen * 8;
01548       break;
01549    case AST_FORMAT_SLINEAR:
01550       samples = f->datalen / 2;
01551       break;
01552    case AST_FORMAT_LPC10:
01553                 /* assumes that the RTP packet contains one LPC10 frame */
01554       samples = 22 * 8;
01555       samples += (((char *)(f->data))[7] & 0x1) * 8;
01556       break;
01557    case AST_FORMAT_ULAW:
01558    case AST_FORMAT_ALAW:
01559       samples = f->datalen;
01560       break;
01561    case AST_FORMAT_G722:
01562    case AST_FORMAT_ADPCM:
01563    case AST_FORMAT_G726:
01564    case AST_FORMAT_G726_AAL2:
01565       samples = f->datalen * 2;
01566       break;
01567    default:
01568       ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(f->subclass));
01569    }
01570    return samples;
01571 }

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 1173 of file frame.c.

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

Referenced by ast_parse_allow_disallow().

01174 {
01175    int x, newindex = 0;
01176 
01177    ast_codec_pref_remove(pref, format);
01178 
01179    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01180       if(AST_FORMAT_LIST[x].bits == format) {
01181          newindex = x + 1;
01182          break;
01183       }
01184    }
01185 
01186    if(newindex) {
01187       for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01188          if(!pref->order[x]) {
01189             pref->order[x] = newindex;
01190             break;
01191          }
01192       }
01193    }
01194 
01195    return x;
01196 }

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 1075 of file frame.c.

References ast_codec_pref::order.

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

01076 {
01077    int x, differential = (int) 'A', mem;
01078    char *from, *to;
01079 
01080    if(right) {
01081       from = pref->order;
01082       to = buf;
01083       mem = size;
01084    } else {
01085       to = pref->order;
01086       from = buf;
01087       mem = 32;
01088    }
01089 
01090    memset(to, 0, mem);
01091    for (x = 0; x < 32 ; x++) {
01092       if(!from[x])
01093          break;
01094       to[x] = right ? (from[x] + differential) : (from[x] - differential);
01095    }
01096 }

struct ast_format_list ast_codec_pref_getsize ( struct ast_codec_pref pref,
int  format 
)

Get packet size for codec.

Definition at line 1275 of file frame.c.

References AST_FORMAT_LIST, ast_format_list::bits, and format.

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

01276 {
01277    int x, index = -1, framems = 0;
01278    struct ast_format_list fmt = {0};
01279 
01280    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01281       if(AST_FORMAT_LIST[x].bits == format) {
01282          fmt = AST_FORMAT_LIST[x];
01283          index = x;
01284          break;
01285       }
01286    }
01287 
01288    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01289       if(pref->order[x] == (index + 1)) {
01290          framems = pref->framing[x];
01291          break;
01292       }
01293    }
01294 
01295    /* size validation */
01296    if(!framems)
01297       framems = AST_FORMAT_LIST[index].def_ms;
01298 
01299    if(AST_FORMAT_LIST[index].inc_ms && framems % AST_FORMAT_LIST[index].inc_ms) /* avoid division by zero */
01300       framems -= framems % AST_FORMAT_LIST[index].inc_ms;
01301 
01302    if(framems < AST_FORMAT_LIST[index].min_ms)
01303       framems = AST_FORMAT_LIST[index].min_ms;
01304 
01305    if(framems > AST_FORMAT_LIST[index].max_ms)
01306       framems = AST_FORMAT_LIST[index].max_ms;
01307 
01308    fmt.cur_ms = framems;
01309 
01310    return fmt;
01311 }

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 1133 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().

01134 {
01135    int slot = 0;
01136 
01137    
01138    if((index >= 0) && (index < sizeof(pref->order))) {
01139       slot = pref->order[index];
01140    }
01141 
01142    return slot ? AST_FORMAT_LIST[slot-1].bits : 0;
01143 }

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 1199 of file frame.c.

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

Referenced by create_addr().

01200 {
01201    int x, newindex = 0;
01202 
01203    /* First step is to get the codecs "index number" */
01204    for (x = 0; x < ARRAY_LEN(AST_FORMAT_LIST); x++) {
01205       if (AST_FORMAT_LIST[x].bits == format) {
01206          newindex = x + 1;
01207          break;
01208       }
01209    }
01210    /* Done if its unknown */
01211    if (!newindex)
01212       return;
01213 
01214    /* Now find any existing occurrence, or the end */
01215    for (x = 0; x < 32; x++) {
01216       if (!pref->order[x] || pref->order[x] == newindex)
01217          break;
01218    }
01219 
01220    if (only_if_existing && !pref->order[x])
01221       return;
01222 
01223    /* Move down to make space to insert - either all the way to the end,
01224       or as far as the existing location (which will be overwritten) */
01225    for (; x > 0; x--) {
01226       pref->order[x] = pref->order[x - 1];
01227       pref->framing[x] = pref->framing[x - 1];
01228    }
01229 
01230    /* And insert the new entry */
01231    pref->order[0] = newindex;
01232    pref->framing[0] = 0; /* ? */
01233 }

void ast_codec_pref_remove ( struct ast_codec_pref pref,
int  format 
)

Remove audio a codec from a preference list.

Definition at line 1146 of file frame.c.

References AST_FORMAT_LIST, and ast_codec_pref::order.

Referenced by ast_codec_pref_append(), and ast_parse_allow_disallow().

01147 {
01148    struct ast_codec_pref oldorder;
01149    int x, y = 0;
01150    int slot;
01151    int size;
01152 
01153    if(!pref->order[0])
01154       return;
01155 
01156    memcpy(&oldorder, pref, sizeof(oldorder));
01157    memset(pref, 0, sizeof(*pref));
01158 
01159    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01160       slot = oldorder.order[x];
01161       size = oldorder.framing[x];
01162       if(! slot)
01163          break;
01164       if(AST_FORMAT_LIST[slot-1].bits != format) {
01165          pref->order[y] = slot;
01166          pref->framing[y++] = size;
01167       }
01168    }
01169    
01170 }

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

Set packet size for codec.

Definition at line 1236 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().

01237 {
01238    int x, index = -1;
01239 
01240    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01241       if(AST_FORMAT_LIST[x].bits == format) {
01242          index = x;
01243          break;
01244       }
01245    }
01246 
01247    if(index < 0)
01248       return -1;
01249 
01250    /* size validation */
01251    if(!framems)
01252       framems = AST_FORMAT_LIST[index].def_ms;
01253 
01254    if(AST_FORMAT_LIST[index].inc_ms && framems % AST_FORMAT_LIST[index].inc_ms) /* avoid division by zero */
01255       framems -= framems % AST_FORMAT_LIST[index].inc_ms;
01256 
01257    if(framems < AST_FORMAT_LIST[index].min_ms)
01258       framems = AST_FORMAT_LIST[index].min_ms;
01259 
01260    if(framems > AST_FORMAT_LIST[index].max_ms)
01261       framems = AST_FORMAT_LIST[index].max_ms;
01262 
01263 
01264    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01265       if(pref->order[x] == (index + 1)) {
01266          pref->framing[x] = framems;
01267          break;
01268       }
01269    }
01270 
01271    return x;
01272 }

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 1098 of file frame.c.

References ast_codec_pref_index(), and ast_getformatname().

Referenced by dump_prefs(), and socket_process().

01099 {
01100    int x, codec; 
01101    size_t total_len, slen;
01102    char *formatname;
01103    
01104    memset(buf,0,size);
01105    total_len = size;
01106    buf[0] = '(';
01107    total_len--;
01108    for(x = 0; x < 32 ; x++) {
01109       if(total_len <= 0)
01110          break;
01111       if(!(codec = ast_codec_pref_index(pref,x)))
01112          break;
01113       if((formatname = ast_getformatname(codec))) {
01114          slen = strlen(formatname);
01115          if(slen > total_len)
01116             break;
01117          strncat(buf, formatname, total_len - 1); /* safe */
01118          total_len -= slen;
01119       }
01120       if(total_len && x < 31 && ast_codec_pref_index(pref , x + 1)) {
01121          strncat(buf, "|", total_len - 1); /* safe */
01122          total_len--;
01123       }
01124    }
01125    if(total_len) {
01126       strncat(buf, ")", total_len - 1); /* safe */
01127       total_len--;
01128    }
01129 
01130    return size - total_len;
01131 }

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

Definition at line 610 of file frame.c.

Referenced by ast_getformatbyname().

00611 {
00612    int x;
00613 
00614    for (x = 0; x < sizeof(ast_codec_alias_table) / sizeof(ast_codec_alias_table[0]); x++) {
00615       if(!strcmp(in,ast_codec_alias_table[x].alias))
00616          return ast_codec_alias_table[x].realname;
00617    }
00618    return in;
00619 }

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 1608 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().

01609 {
01610    int count;
01611    short *fdata = f->data;
01612    short adjust_value = abs(adjustment);
01613 
01614    if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR))
01615       return -1;
01616 
01617    if (!adjustment)
01618       return 0;
01619 
01620    for (count = 0; count < f->samples; count++) {
01621       if (adjustment > 0) {
01622          ast_slinear_saturated_multiply(&fdata[count], &adjust_value);
01623       } else if (adjustment < 0) {
01624          ast_slinear_saturated_divide(&fdata[count], &adjust_value);
01625       }
01626    }
01627 
01628    return 0;
01629 }

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

Dump a frame for debugging purposes

Definition at line 793 of file frame.c.

References AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_FLASH, AST_CONTROL_HANGUP, AST_CONTROL_HOLD, AST_CONTROL_OFFHOOK, AST_CONTROL_OPTION, AST_CONTROL_PROCEEDING, AST_CONTROL_PROGRESS, AST_CONTROL_RADIO_KEY, AST_CONTROL_RADIO_UNKEY, AST_CONTROL_RING, AST_CONTROL_RINGING, AST_CONTROL_TAKEOFFHOOK, AST_CONTROL_UNHOLD, AST_CONTROL_WINK, ast_copy_string(), 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_MODEM_T38, AST_MODEM_V150, ast_strlen_zero(), ast_verbose(), COLOR_BLACK, COLOR_BRCYAN, COLOR_BRGREEN, COLOR_BRMAGENTA, COLOR_BRRED, COLOR_YELLOW, f, and term_color().

Referenced by __ast_read(), and ast_write().

00794 {
00795    const char noname[] = "unknown";
00796    char ftype[40] = "Unknown Frametype";
00797    char cft[80];
00798    char subclass[40] = "Unknown Subclass";
00799    char csub[80];
00800    char moreinfo[40] = "";
00801    char cn[60];
00802    char cp[40];
00803    char cmn[40];
00804 
00805    if (!name)
00806       name = noname;
00807 
00808 
00809    if (!f) {
00810       ast_verbose("%s [ %s (NULL) ] [%s]\n", 
00811          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00812          term_color(cft, "HANGUP", COLOR_BRRED, COLOR_BLACK, sizeof(cft)), 
00813          term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00814       return;
00815    }
00816    /* XXX We should probably print one each of voice and video when the format changes XXX */
00817    if (f->frametype == AST_FRAME_VOICE)
00818       return;
00819    if (f->frametype == AST_FRAME_VIDEO)
00820       return;
00821    switch(f->frametype) {
00822    case AST_FRAME_DTMF_BEGIN:
00823       strcpy(ftype, "DTMF Begin");
00824       subclass[0] = f->subclass;
00825       subclass[1] = '\0';
00826       break;
00827    case AST_FRAME_DTMF_END:
00828       strcpy(ftype, "DTMF End");
00829       subclass[0] = f->subclass;
00830       subclass[1] = '\0';
00831       break;
00832    case AST_FRAME_CONTROL:
00833       strcpy(ftype, "Control");
00834       switch(f->subclass) {
00835       case AST_CONTROL_HANGUP:
00836          strcpy(subclass, "Hangup");
00837          break;
00838       case AST_CONTROL_RING:
00839          strcpy(subclass, "Ring");
00840          break;
00841       case AST_CONTROL_RINGING:
00842          strcpy(subclass, "Ringing");
00843          break;
00844       case AST_CONTROL_ANSWER:
00845          strcpy(subclass, "Answer");
00846          break;
00847       case AST_CONTROL_BUSY:
00848          strcpy(subclass, "Busy");
00849          break;
00850       case AST_CONTROL_TAKEOFFHOOK:
00851          strcpy(subclass, "Take Off Hook");
00852          break;
00853       case AST_CONTROL_OFFHOOK:
00854          strcpy(subclass, "Line Off Hook");
00855          break;
00856       case AST_CONTROL_CONGESTION:
00857          strcpy(subclass, "Congestion");
00858          break;
00859       case AST_CONTROL_FLASH:
00860          strcpy(subclass, "Flash");
00861          break;
00862       case AST_CONTROL_WINK:
00863          strcpy(subclass, "Wink");
00864          break;
00865       case AST_CONTROL_OPTION:
00866          strcpy(subclass, "Option");
00867          break;
00868       case AST_CONTROL_RADIO_KEY:
00869          strcpy(subclass, "Key Radio");
00870          break;
00871       case AST_CONTROL_RADIO_UNKEY:
00872          strcpy(subclass, "Unkey Radio");
00873          break;
00874       case AST_CONTROL_PROGRESS:
00875          strcpy(subclass, "Call Progress");
00876          break;
00877       case AST_CONTROL_PROCEEDING:
00878          strcpy(subclass, "Proceeding");
00879          break;
00880       case AST_CONTROL_HOLD:
00881         strcpy(subclass, "Hold");
00882         break;
00883       case AST_CONTROL_UNHOLD:
00884         strcpy(subclass, "UnHold");
00885         break;
00886       case -1:
00887          strcpy(subclass, "Stop generators");
00888          break;
00889       default:
00890          snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass);
00891       }
00892       break;
00893    case AST_FRAME_NULL:
00894       strcpy(ftype, "Null Frame");
00895       strcpy(subclass, "N/A");
00896       break;
00897    case AST_FRAME_IAX:
00898       /* Should never happen */
00899       strcpy(ftype, "IAX Specific");
00900       snprintf(subclass, sizeof(subclass), "IAX Frametype %d", f->subclass);
00901       break;
00902    case AST_FRAME_TEXT:
00903       strcpy(ftype, "Text");
00904       strcpy(subclass, "N/A");
00905       ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00906       break;
00907    case AST_FRAME_IMAGE:
00908       strcpy(ftype, "Image");
00909       snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(f->subclass));
00910       break;
00911    case AST_FRAME_HTML:
00912       strcpy(ftype, "HTML");
00913       switch(f->subclass) {
00914       case AST_HTML_URL:
00915          strcpy(subclass, "URL");
00916          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00917          break;
00918       case AST_HTML_DATA:
00919          strcpy(subclass, "Data");
00920          break;
00921       case AST_HTML_BEGIN:
00922          strcpy(subclass, "Begin");
00923          break;
00924       case AST_HTML_END:
00925          strcpy(subclass, "End");
00926          break;
00927       case AST_HTML_LDCOMPLETE:
00928          strcpy(subclass, "Load Complete");
00929          break;
00930       case AST_HTML_NOSUPPORT:
00931          strcpy(subclass, "No Support");
00932          break;
00933       case AST_HTML_LINKURL:
00934          strcpy(subclass, "Link URL");
00935          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00936          break;
00937       case AST_HTML_UNLINK:
00938          strcpy(subclass, "Unlink");
00939          break;
00940       case AST_HTML_LINKREJECT:
00941          strcpy(subclass, "Link Reject");
00942          break;
00943       default:
00944          snprintf(subclass, sizeof(subclass), "Unknown HTML frame '%d'\n", f->subclass);
00945          break;
00946       }
00947       break;
00948    case AST_FRAME_MODEM:
00949       strcpy(ftype, "Modem");
00950       switch (f->subclass) {
00951       case AST_MODEM_T38:
00952          strcpy(subclass, "T.38");
00953          break;
00954       case AST_MODEM_V150:
00955          strcpy(subclass, "V.150");
00956          break;
00957       default:
00958          snprintf(subclass, sizeof(subclass), "Unknown MODEM frame '%d'\n", f->subclass);
00959          break;
00960       }
00961       break;
00962    default:
00963       snprintf(ftype, sizeof(ftype), "Unknown Frametype '%d'", f->frametype);
00964    }
00965    if (!ast_strlen_zero(moreinfo))
00966       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) '%s' ] [%s]\n",  
00967              term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00968              term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00969              f->frametype, 
00970              term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00971              f->subclass, 
00972              term_color(cmn, moreinfo, COLOR_BRGREEN, COLOR_BLACK, sizeof(cmn)),
00973              term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00974    else
00975       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) ] [%s]\n",  
00976              term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00977              term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00978              f->frametype, 
00979              term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00980              f->subclass, 
00981              term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00982 }

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 354 of file frame.c.

References ast_dsp_frame_freed(), ast_filestream_frame_freed(), AST_FRFLAG_FROM_DSP, AST_FRFLAG_FROM_FILESTREAM, 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_threadstorage_get(), ast_translate_frame_freed(), ast_frame::data, frame_cache, FRAME_CACHE_MAX_SIZE, frames, free, ast_frame::mallocd, ast_frame::offset, and ast_frame::src.

Referenced by mixmonitor_thread().

00355 {
00356    if (ast_test_flag(fr, AST_FRFLAG_FROM_TRANSLATOR)) {
00357       ast_translate_frame_freed(fr);
00358    } else if (ast_test_flag(fr, AST_FRFLAG_FROM_DSP)) {
00359       ast_dsp_frame_freed(fr);
00360    } else if (ast_test_flag(fr, AST_FRFLAG_FROM_FILESTREAM)) {
00361       ast_filestream_frame_freed(fr);
00362    }
00363 
00364    if (!fr->mallocd)
00365       return;
00366 
00367 #if !defined(LOW_MEMORY)
00368    if (cache && fr->mallocd == AST_MALLOCD_HDR) {
00369       /* Cool, only the header is malloc'd, let's just cache those for now 
00370        * to keep things simple... */
00371       struct ast_frame_cache *frames;
00372 
00373       if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames))) 
00374           && frames->size < FRAME_CACHE_MAX_SIZE) {
00375          AST_LIST_INSERT_HEAD(&frames->list, fr, frame_list);
00376          frames->size++;
00377          return;
00378       }
00379    }
00380 #endif
00381    
00382    if (fr->mallocd & AST_MALLOCD_DATA) {
00383       if (fr->data) 
00384          free(fr->data - fr->offset);
00385    }
00386    if (fr->mallocd & AST_MALLOCD_SRC) {
00387       if (fr->src)
00388          free((char *)fr->src);
00389    }
00390    if (fr->mallocd & AST_MALLOCD_HDR) {
00391 #ifdef TRACE_FRAMES
00392       AST_LIST_LOCK(&headerlist);
00393       headers--;
00394       AST_LIST_REMOVE(&headerlist, fr, frame_list);
00395       AST_LIST_UNLOCK(&headerlist);
00396 #endif         
00397       free(fr);
00398    }
00399 }

static struct ast_frame* ast_frame_header_new ( void   )  [static]

Definition at line 306 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, ast_threadstorage_get(), f, frame_cache, and frames.

Referenced by ast_frisolate().

00307 {
00308    struct ast_frame *f;
00309 
00310 #if !defined(LOW_MEMORY)
00311    struct ast_frame_cache *frames;
00312 
00313    if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
00314       if ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list))) {
00315          size_t mallocd_len = f->mallocd_hdr_len;
00316          memset(f, 0, sizeof(*f));
00317          f->mallocd_hdr_len = mallocd_len;
00318          f->mallocd = AST_MALLOCD_HDR;
00319          frames->size--;
00320          return f;
00321       }
00322    }
00323    if (!(f = ast_calloc_cache(1, sizeof(*f))))
00324       return NULL;
00325 #else
00326    if (!(f = ast_calloc(1, sizeof(*f))))
00327       return NULL;
00328 #endif
00329 
00330    f->mallocd_hdr_len = sizeof(*f);
00331 #ifdef TRACE_FRAMES
00332    AST_LIST_LOCK(&headerlist);
00333    headers++;
00334    AST_LIST_INSERT_HEAD(&headerlist, f, frame_list);
00335    AST_LIST_UNLOCK(&headerlist);
00336 #endif   
00337    
00338    return f;
00339 }

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 1631 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.

01632 {
01633    int count;
01634    short *data1, *data2;
01635 
01636    if ((f1->frametype != AST_FRAME_VOICE) || (f1->subclass != AST_FORMAT_SLINEAR))
01637       return -1;
01638 
01639    if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass != AST_FORMAT_SLINEAR))
01640       return -1;
01641 
01642    if (f1->samples != f2->samples)
01643       return -1;
01644 
01645    for (count = 0, data1 = f1->data, data2 = f2->data;
01646         count < f1->samples;
01647         count++, data1++, data2++)
01648       ast_slinear_saturated_add(data1, data2);
01649 
01650    return 0;
01651 }

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 465 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_threadstorage_get(), ast_frame::data, ast_frame::datalen, ast_frame::delivery, f, frame_cache, 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_queue_frame(), ast_jb_put(), ast_rtp_write(), ast_slinfactory_feed(), audiohook_read_frame_single(), autoservice_run(), recordthread(), and rpt().

00466 {
00467    struct ast_frame *out = NULL;
00468    int len, srclen = 0;
00469    void *buf = NULL;
00470 
00471 #if !defined(LOW_MEMORY)
00472    struct ast_frame_cache *frames;
00473 #endif
00474 
00475    /* Start with standard stuff */
00476    len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
00477    /* If we have a source, add space for it */
00478    /*
00479     * XXX Watch out here - if we receive a src which is not terminated
00480     * properly, we can be easily attacked. Should limit the size we deal with.
00481     */
00482    if (f->src)
00483       srclen = strlen(f->src);
00484    if (srclen > 0)
00485       len += srclen + 1;
00486    
00487 #if !defined(LOW_MEMORY)
00488    if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
00489       AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
00490          if (out->mallocd_hdr_len >= len) {
00491             size_t mallocd_len = out->mallocd_hdr_len;
00492             AST_LIST_REMOVE_CURRENT(&frames->list, frame_list);
00493             memset(out, 0, sizeof(*out));
00494             out->mallocd_hdr_len = mallocd_len;
00495             buf = out;
00496             frames->size--;
00497             break;
00498          }
00499       }
00500       AST_LIST_TRAVERSE_SAFE_END
00501    }
00502 #endif
00503 
00504    if (!buf) {
00505       if (!(buf = ast_calloc_cache(1, len)))
00506          return NULL;
00507       out = buf;
00508       out->mallocd_hdr_len = len;
00509    }
00510 
00511    out->frametype = f->frametype;
00512    out->subclass = f->subclass;
00513    out->datalen = f->datalen;
00514    out->samples = f->samples;
00515    out->delivery = f->delivery;
00516    /* Set us as having malloc'd header only, so it will eventually
00517       get freed. */
00518    out->mallocd = AST_MALLOCD_HDR;
00519    out->offset = AST_FRIENDLY_OFFSET;
00520    if (out->datalen) {
00521       out->data = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
00522       memcpy(out->data, f->data, out->datalen); 
00523    }
00524    if (srclen > 0) {
00525       /* This may seem a little strange, but it's to avoid a gcc (4.2.4) compiler warning */
00526       char *src;
00527       out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
00528       src = (char *) out->src;
00529       /* Must have space since we allocated for it */
00530       strcpy(src, f->src);
00531    }
00532    ast_copy_flags(out, f, AST_FRFLAG_HAS_TIMING_INFO);
00533    out->ts = f->ts;
00534    out->len = f->len;
00535    out->seqno = f->seqno;
00536    return out;
00537 }

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 406 of file frame.c.

References ast_clear_flag, ast_copy_flags, ast_frame_header_new(), AST_FRFLAG_FROM_DSP, 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().

00407 {
00408    struct ast_frame *out;
00409    void *newdata;
00410 
00411    ast_clear_flag(fr, AST_FRFLAG_FROM_TRANSLATOR);
00412    ast_clear_flag(fr, AST_FRFLAG_FROM_DSP);
00413 
00414    if (!(fr->mallocd & AST_MALLOCD_HDR)) {
00415       /* Allocate a new header if needed */
00416       if (!(out = ast_frame_header_new()))
00417          return NULL;
00418       out->frametype = fr->frametype;
00419       out->subclass = fr->subclass;
00420       out->datalen = fr->datalen;
00421       out->samples = fr->samples;
00422       out->offset = fr->offset;
00423       out->data = fr->data;
00424       /* Copy the timing data */
00425       ast_copy_flags(out, fr, AST_FRFLAG_HAS_TIMING_INFO);
00426       if (ast_test_flag(fr, AST_FRFLAG_HAS_TIMING_INFO)) {
00427          out->ts = fr->ts;
00428          out->len = fr->len;
00429          out->seqno = fr->seqno;
00430       }
00431    } else
00432       out = fr;
00433    
00434    if (!(fr->mallocd & AST_MALLOCD_SRC)) {
00435       if (fr->src) {
00436          if (!(out->src = ast_strdup(fr->src))) {
00437             if (out != fr)
00438                free(out);
00439             return NULL;
00440          }
00441       }
00442    } else
00443       out->src = fr->src;
00444    
00445    if (!(fr->mallocd & AST_MALLOCD_DATA))  {
00446       if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) {
00447          if (out->src != fr->src)
00448             free((void *) out->src);
00449          if (out != fr)
00450             free(out);
00451          return NULL;
00452       }
00453       newdata += AST_FRIENDLY_OFFSET;
00454       out->offset = AST_FRIENDLY_OFFSET;
00455       out->datalen = fr->datalen;
00456       memcpy(newdata, fr->data, fr->datalen);
00457       out->data = newdata;
00458    }
00459 
00460    out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
00461    
00462    return out;
00463 }

struct ast_format_list* ast_get_format_list ( size_t *  size  ) 

Definition at line 555 of file frame.c.

References AST_FORMAT_LIST.

00556 {
00557    *size = (sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]));
00558    return AST_FORMAT_LIST;
00559 }

struct ast_format_list* ast_get_format_list_index ( int  index  ) 

Definition at line 550 of file frame.c.

References AST_FORMAT_LIST.

00551 {
00552    return &AST_FORMAT_LIST[index];
00553 }

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 621 of file frame.c.

References ast_expand_codec_alias(), AST_FORMAT_LIST, and format.

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

00622 {
00623    int x, all, format = 0;
00624 
00625    all = strcasecmp(name, "all") ? 0 : 1;
00626    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00627       if(AST_FORMAT_LIST[x].visible && (all || 
00628            !strcasecmp(AST_FORMAT_LIST[x].name,name) ||
00629            !strcasecmp(AST_FORMAT_LIST[x].name,ast_expand_codec_alias(name)))) {
00630          format |= AST_FORMAT_LIST[x].bits;
00631          if(!all)
00632             break;
00633       }
00634    }
00635 
00636    return format;
00637 }

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 561 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_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(), dahdi_read(), 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(), 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(), and socket_process().

00562 {
00563    int x;
00564    char *ret = "unknown";
00565    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00566       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == format) {
00567          ret = AST_FORMAT_LIST[x].name;
00568          break;
00569       }
00570    }
00571    return ret;
00572 }

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 574 of file frame.c.

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

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

00575 {
00576    int x;
00577    unsigned len;
00578    char *start, *end = buf;
00579 
00580    if (!size)
00581       return buf;
00582    snprintf(end, size, "0x%x (", format);
00583    len = strlen(end);
00584    end += len;
00585    size -= len;
00586    start = end;
00587    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00588       if (AST_FORMAT_LIST[x].visible && (AST_FORMAT_LIST[x].bits & format)) {
00589          snprintf(end, size,"%s|",AST_FORMAT_LIST[x].name);
00590          len = strlen(end);
00591          end += len;
00592          size -= len;
00593       }
00594    }
00595    if (start == end)
00596       snprintf(start, size, "nothing)");
00597    else if (size > 1)
00598       *(end -1) = ')';
00599    return buf;
00600 }

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 1337 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, and parse().

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

01338 {
01339    char *parse = NULL, *this = NULL, *psize = NULL;
01340    int format = 0, framems = 0;
01341 
01342    parse = ast_strdupa(list);
01343    while ((this = strsep(&parse, ","))) {
01344       framems = 0;
01345       if ((psize = strrchr(this, ':'))) {
01346          *psize++ = '\0';
01347          if (option_debug)
01348             ast_log(LOG_DEBUG,"Packetization for codec: %s is %s\n", this, psize);
01349          framems = atoi(psize);
01350          if (framems < 0)
01351             framems = 0;
01352       }
01353       if (!(format = ast_getformatbyname(this))) {
01354          ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", allowing ? "allow" : "disallow", this);
01355          continue;
01356       }
01357 
01358       if (mask) {
01359          if (allowing)
01360             *mask |= format;
01361          else
01362             *mask &= ~format;
01363       }
01364 
01365       /* Set up a preference list for audio. Do not include video in preferences 
01366          since we can not transcode video and have to use whatever is offered
01367        */
01368       if (pref && (format & AST_FORMAT_AUDIO_MASK)) {
01369          if (strcasecmp(this, "all")) {
01370             if (allowing) {
01371                ast_codec_pref_append(pref, format);
01372                ast_codec_pref_setsize(pref, format, framems);
01373             }
01374             else
01375                ast_codec_pref_remove(pref, format);
01376          } else if (!allowing) {
01377             memset(pref, 0, sizeof(*pref));
01378          }
01379       }
01380    }
01381 }

void ast_smoother_free ( struct ast_smoother s  ) 

Definition at line 301 of file frame.c.

References free, and s.

Referenced by ast_rtp_destroy(), and ast_rtp_write().

00302 {
00303    free(s);
00304 }

int ast_smoother_get_flags ( struct ast_smoother s  ) 

Definition at line 201 of file frame.c.

References s.

00202 {
00203    return s->flags;
00204 }

struct ast_smoother* ast_smoother_new ( int  size  ) 

Definition at line 191 of file frame.c.

References ast_malloc, ast_smoother_reset(), and s.

Referenced by ast_rtp_codec_setpref(), and ast_rtp_write().

00192 {
00193    struct ast_smoother *s;
00194    if (size < 1)
00195       return NULL;
00196    if ((s = ast_malloc(sizeof(*s))))
00197       ast_smoother_reset(s, size);
00198    return s;
00199 }

struct ast_frame* ast_smoother_read ( struct ast_smoother s  ) 

Definition at line 251 of file frame.c.

References AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_samp2tv(), AST_SMOOTHER_FLAG_G729, ast_tvadd(), ast_tvzero(), len(), LOG_WARNING, and s.

Referenced by ast_rtp_write().

00252 {
00253    struct ast_frame *opt;
00254    int len;
00255 
00256    /* IF we have an optimization frame, send it */
00257    if (s->opt) {
00258       if (s->opt->offset < AST_FRIENDLY_OFFSET)
00259          ast_log(LOG_WARNING, "Returning a frame of inappropriate offset (%d).\n",
00260                      s->opt->offset);
00261       opt = s->opt;
00262       s->opt = NULL;
00263       return opt;
00264    }
00265 
00266    /* Make sure we have enough data */
00267    if (s->len < s->size) {
00268       /* Or, if this is a G.729 frame with VAD on it, send it immediately anyway */
00269       if (!((s->flags & AST_SMOOTHER_FLAG_G729) && (s->size % 10)))
00270          return NULL;
00271    }
00272    len = s->size;
00273    if (len > s->len)
00274       len = s->len;
00275    /* Make frame */
00276    s->f.frametype = AST_FRAME_VOICE;
00277    s->f.subclass = s->format;
00278    s->f.data = s->framedata + AST_FRIENDLY_OFFSET;
00279    s->f.offset = AST_FRIENDLY_OFFSET;
00280    s->f.datalen = len;
00281    /* Samples will be improper given VAD, but with VAD the concept really doesn't even exist */
00282    s->f.samples = len * s->samplesperbyte;   /* XXX rounding */
00283    s->f.delivery = s->delivery;
00284    /* Fill Data */
00285    memcpy(s->f.data, s->data, len);
00286    s->len -= len;
00287    /* Move remaining data to the front if applicable */
00288    if (s->len) {
00289       /* In principle this should all be fine because if we are sending
00290          G.729 VAD, the next timestamp will take over anyawy */
00291       memmove(s->data, s->data + len, s->len);
00292       if (!ast_tvzero(s->delivery)) {
00293          /* If we have delivery time, increment it, otherwise, leave it at 0 */
00294          s->delivery = ast_tvadd(s->delivery, ast_samp2tv(s->f.samples, 8000));
00295       }
00296    }
00297    /* Return frame */
00298    return &s->f;
00299 }

void ast_smoother_reconfigure ( struct ast_smoother s,
int  bytes 
)

Reconfigure an existing smoother to output a different number of bytes per frame.

Parameters:
s the smoother to reconfigure
bytes the desired number of bytes per output frame
Returns:
nothing

Definition at line 169 of file frame.c.

References s, and smoother_frame_feed().

Referenced by ast_rtp_codec_setpref().

00170 {
00171    /* if there is no change, then nothing to do */
00172    if (s->size == bytes) {
00173       return;
00174    }
00175    /* set the new desired output size */
00176    s->size = bytes;
00177    /* if there is no 'optimized' frame in the smoother,
00178     *   then there is nothing left to do
00179     */
00180    if (!s->opt) {
00181       return;
00182    }
00183    /* there is an 'optimized' frame here at the old size,
00184     * but it must now be put into the buffer so the data
00185     * can be extracted at the new size
00186     */
00187    smoother_frame_feed(s, s->opt, s->opt_needs_swap);
00188    s->opt = NULL;
00189 }

void ast_smoother_reset ( struct ast_smoother s,
int  bytes 
)

Definition at line 163 of file frame.c.

References s.

Referenced by ast_smoother_new().

00164 {
00165    memset(s, 0, sizeof(*s));
00166    s->size = bytes;
00167 }

void ast_smoother_set_flags ( struct ast_smoother s,
int  flags 
)

Definition at line 206 of file frame.c.

References s.

Referenced by ast_rtp_codec_setpref(), and ast_rtp_write().

00207 {
00208    s->flags = flags;
00209 }

int ast_smoother_test_flag ( struct ast_smoother s,
int  flag 
)

Definition at line 211 of file frame.c.

References s.

Referenced by ast_rtp_write().

00212 {
00213    return (s->flags & flag);
00214 }

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

Definition at line 539 of file frame.c.

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

00540 {
00541    int i;
00542    unsigned short *dst_s = dst;
00543    const unsigned short *src_s = src;
00544 
00545    for (i = 0; i < samples; i++)
00546       dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
00547 }

static void frame_cache_cleanup ( void *  data  )  [static]

Definition at line 342 of file frame.c.

References AST_LIST_REMOVE_HEAD, f, ast_frame::frame_list, frames, and free.

00343 {
00344    struct ast_frame_cache *frames = data;
00345    struct ast_frame *f;
00346 
00347    while ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list)))
00348       free(f);
00349    
00350    free(frames);
00351 }

static void frame_cache_init ( void   )  [static]

A per-thread cache of frame headers.

Definition at line 59 of file frame.c.

00076 {

static int g723_len ( unsigned char  buf  )  [static]

Definition at line 1383 of file frame.c.

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

Referenced by g723_samples().

01384 {
01385    enum frame_type type = buf & TYPE_MASK;
01386 
01387    switch(type) {
01388    case TYPE_DONTSEND:
01389       return 0;
01390       break;
01391    case TYPE_SILENCE:
01392       return 4;
01393       break;
01394    case TYPE_HIGH:
01395       return 24;
01396       break;
01397    case TYPE_LOW:
01398       return 20;
01399       break;
01400    default:
01401       ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", type);
01402    }
01403    return -1;
01404 }

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

Definition at line 1406 of file frame.c.

References g723_len().

Referenced by ast_codec_get_samples().

01407 {
01408    int pos = 0;
01409    int samples = 0;
01410    int res;
01411    while(pos < maxlen) {
01412       res = g723_len(buf[pos]);
01413       if (res <= 0)
01414          break;
01415       samples += 240;
01416       pos += res;
01417    }
01418    return samples;
01419 }

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

Definition at line 1421 of file frame.c.

Referenced by speex_get_wb_sz_at(), and speex_samples().

01422 {
01423    int byte = bit / 8;       /* byte containing first bit */
01424    int rem = 8 - (bit % 8);  /* remaining bits in first byte */
01425    unsigned char ret = 0;
01426    
01427    if (n <= 0 || n > 8)
01428       return 0;
01429 
01430    if (rem < n) {
01431       ret = (data[byte] << (n - rem));
01432       ret |= (data[byte + 1] >> (8 - n + rem));
01433    } else {
01434       ret = (data[byte] >> (rem - n));
01435    }
01436 
01437    return (ret & (0xff >> (8 - n)));
01438 }

int init_framer ( void   ) 

Provided by frame.c

Definition at line 1069 of file frame.c.

References ast_cli_register_multiple(), and my_clis.

Referenced by main().

01070 {
01071    ast_cli_register_multiple(my_clis, sizeof(my_clis) / sizeof(struct ast_cli_entry));
01072    return 0;   
01073 }

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

Definition at line 766 of file frame.c.

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

00767 {
00768    int codec, i, found=0;
00769 
00770    if (argc != 4)
00771       return RESULT_SHOWUSAGE;
00772 
00773    if (sscanf(argv[3],"%d",&codec) != 1)
00774       return RESULT_SHOWUSAGE;
00775 
00776    for (i = 0; i < 32; i++)
00777       if (codec & (1 << i)) {
00778          found = 1;
00779          ast_cli(fd, "%11u (1 << %2d)  %s\n",1 << i,i,ast_codec2str(1<<i));
00780       }
00781 
00782    if (!found)
00783       ast_cli(fd, "Codec %d not found\n", codec);
00784 
00785    return RESULT_SUCCESS;
00786 }

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

Definition at line 744 of file frame.c.

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

00745 {
00746    int codec, i, found=0;
00747 
00748    if (argc != 3)
00749       return RESULT_SHOWUSAGE;
00750 
00751    if (sscanf(argv[2],"%d",&codec) != 1)
00752       return RESULT_SHOWUSAGE;
00753 
00754    for (i = 0; i < 32; i++)
00755       if (codec & (1 << i)) {
00756          found = 1;
00757          ast_cli(fd, "%11u (1 << %2d)  %s\n",1 << i,i,ast_codec2str(1<<i));
00758       }
00759 
00760    if (!found)
00761       ast_cli(fd, "Codec %d not found\n", codec);
00762 
00763    return RESULT_SUCCESS;
00764 }

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

Definition at line 696 of file frame.c.

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

00697 {
00698    int i, found=0;
00699    char hex[25];
00700    
00701    if ((argc < 3) || (argc > 4))
00702       return RESULT_SHOWUSAGE;
00703 
00704    if (!ast_opt_dont_warn)
00705       ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n"
00706             "\tIt does not indicate anything about your configuration.\n");
00707 
00708    ast_cli(fd, "%11s %9s %10s   TYPE   %8s   %s\n","INT","BINARY","HEX","NAME","DESC");
00709    ast_cli(fd, "--------------------------------------------------------------------------------\n");
00710    if ((argc == 3) || (!strcasecmp(argv[3],"audio"))) {
00711       found = 1;
00712       for (i=0;i<13;i++) {
00713          snprintf(hex,25,"(0x%x)",1<<i);
00714          ast_cli(fd, "%11u (1 << %2d) %10s  audio   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00715       }
00716    }
00717 
00718    if ((argc == 3) || (!strcasecmp(argv[3],"image"))) {
00719       found = 1;
00720       for (i=16;i<18;i++) {
00721          snprintf(hex,25,"(0x%x)",1<<i);
00722          ast_cli(fd, "%11u (1 << %2d) %10s  image   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00723       }
00724    }
00725 
00726    if ((argc == 3) || (!strcasecmp(argv[3],"video"))) {
00727       found = 1;
00728       for (i=18;i<22;i++) {
00729          snprintf(hex,25,"(0x%x)",1<<i);
00730          ast_cli(fd, "%11u (1 << %2d) %10s  video   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00731       }
00732    }
00733 
00734    if (! found)
00735       return RESULT_SHOWUSAGE;
00736    else
00737       return RESULT_SUCCESS;
00738 }

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

Definition at line 652 of file frame.c.

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

00653 {
00654    int i, found=0;
00655    char hex[25];
00656    
00657    if ((argc < 2) || (argc > 3))
00658       return RESULT_SHOWUSAGE;
00659 
00660    if (!ast_opt_dont_warn)
00661       ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n"
00662             "\tIt does not indicate anything about your configuration.\n");
00663 
00664    ast_cli(fd, "%11s %9s %10s   TYPE   %8s   %s\n","INT","BINARY","HEX","NAME","DESC");
00665    ast_cli(fd, "--------------------------------------------------------------------------------\n");
00666    if ((argc == 2) || (!strcasecmp(argv[1],"audio"))) {
00667       found = 1;
00668       for (i=0;i<13;i++) {
00669          snprintf(hex,25,"(0x%x)",1<<i);
00670          ast_cli(fd, "%11u (1 << %2d) %10s  audio   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00671       }
00672    }
00673 
00674    if ((argc == 2) || (!strcasecmp(argv[1],"image"))) {
00675       found = 1;
00676       for (i=16;i<18;i++) {
00677          snprintf(hex,25,"(0x%x)",1<<i);
00678          ast_cli(fd, "%11u (1 << %2d) %10s  image   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00679       }
00680    }
00681 
00682    if ((argc == 2) || (!strcasecmp(argv[1],"video"))) {
00683       found = 1;
00684       for (i=18;i<22;i++) {
00685          snprintf(hex,25,"(0x%x)",1<<i);
00686          ast_cli(fd, "%11u (1 << %2d) %10s  video   %8s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00687       }
00688    }
00689 
00690    if (! found)
00691       return RESULT_SHOWUSAGE;
00692    else
00693       return RESULT_SUCCESS;
00694 }

static int smoother_frame_feed ( struct ast_smoother s,
struct ast_frame f,
int  swap 
) [static]

Definition at line 141 of file frame.c.

References ast_log(), AST_SMOOTHER_FLAG_G729, ast_swapcopy_samples(), ast_tvzero(), f, LOG_NOTICE, and s.

Referenced by __ast_smoother_feed(), and ast_smoother_reconfigure().

00142 {
00143    if (s->flags & AST_SMOOTHER_FLAG_G729) {
00144       if (s->len % 10) {
00145          ast_log(LOG_NOTICE, "Dropping extra frame of G.729 since we already have a VAD frame at the end\n");
00146          return 0;
00147       }
00148    }
00149    if (swap) {
00150       ast_swapcopy_samples(s->data + s->len, f->data, f->samples);
00151    } else {
00152       memcpy(s->data + s->len, f->data, f->datalen);
00153    }
00154    /* If either side is empty, reset the delivery time */
00155    if (!s->len || ast_tvzero(f->delivery) || ast_tvzero(s->delivery)) { /* XXX really ? */
00156       s->delivery = f->delivery;
00157    }
00158    s->len += f->datalen;
00159 
00160    return 0;
00161 }

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

Definition at line 1440 of file frame.c.

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

Referenced by speex_samples().

01441 {
01442    static int SpeexWBSubModeSz[] = {
01443       0, 36, 112, 192,
01444       352, 0, 0, 0 };
01445    int off = bit;
01446    unsigned char c;
01447 
01448    /* skip up to two wideband frames */
01449    if (((len * 8 - off) >= 5) && 
01450       get_n_bits_at(data, 1, off)) {
01451       c = get_n_bits_at(data, 3, off + 1);
01452       off += SpeexWBSubModeSz[c];
01453 
01454       if (((len * 8 - off) >= 5) && 
01455          get_n_bits_at(data, 1, off)) {
01456          c = get_n_bits_at(data, 3, off + 1);
01457          off += SpeexWBSubModeSz[c];
01458 
01459          if (((len * 8 - off) >= 5) && 
01460             get_n_bits_at(data, 1, off)) {
01461             ast_log(LOG_WARNING, "Encountered corrupt speex frame; too many wideband frames in a row.\n");
01462             return -1;
01463          }
01464       }
01465 
01466    }
01467    return off - bit;
01468 }

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

Definition at line 1470 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().

01471 {
01472    static int SpeexSubModeSz[] = {
01473                5, 43, 119, 160,
01474       220, 300, 364, 492, 
01475       79, 0, 0, 0,
01476       0, 0, 0, 0 };
01477    static int SpeexInBandSz[] = { 
01478       1, 1, 4, 4,
01479       4, 4, 4, 4,
01480       8, 8, 16, 16,
01481       32, 32, 64, 64 };
01482    int bit = 0;
01483    int cnt = 0;
01484    int off;
01485    unsigned char c;
01486 
01487    while ((len * 8 - bit) >= 5) {
01488       /* skip wideband frames */
01489       off = speex_get_wb_sz_at(data, len, bit);
01490       if (off < 0)  {
01491          ast_log(LOG_WARNING, "Had error while reading wideband frames for speex samples\n");
01492          break;
01493       }
01494       bit += off;
01495 
01496       if ((len * 8 - bit) < 5) {
01497          ast_log(LOG_WARNING, "Not enough bits remaining after wide band for speex samples.\n");
01498          break;
01499       }
01500 
01501       /* get control bits */
01502       c = get_n_bits_at(data, 5, bit);
01503       bit += 5;
01504 
01505       if (c == 15) { 
01506          /* terminator */
01507          break; 
01508       } else if (c == 14) {
01509          /* in-band signal; next 4 bits contain signal id */
01510          c = get_n_bits_at(data, 4, bit);
01511          bit += 4;
01512          bit += SpeexInBandSz[c];
01513       } else if (c == 13) {
01514          /* user in-band; next 5 bits contain msg len */
01515          c = get_n_bits_at(data, 5, bit);
01516          bit += 5;
01517          bit += c * 8;
01518       } else if (c > 8) {
01519          /* unknown */
01520          break;
01521       } else {
01522          /* skip number bits for submode (less the 5 control bits) */
01523          bit += SpeexSubModeSz[c] - 5;
01524          cnt += 160; /* new frame */
01525       }
01526    }
01527    return cnt;
01528 }


Variable Documentation

struct ast_format_list AST_FORMAT_LIST[] [static]

Definition of supported media formats (codecs).

Definition at line 108 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(), local_read(), mgcp_rtp_read(), oh323_read(), oh323_rtp_read(), process_rfc2833(), process_sdp(), send_dtmf(), sip_read(), 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 1014 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 1029 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 1009 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 1024 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 1019 of file frame.c.

struct ast_threadstorage frame_cache = { .once = PTHREAD_ONCE_INIT, .key_init = frame_cache_init , } [static]

Definition at line 59 of file frame.c.

Referenced by ast_frame_free(), ast_frame_header_new(), ast_frdup(), iax_frame_free(), and iax_frame_new().

char frame_show_codec_n_usage[] [static]

Initial value:

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

Definition at line 788 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 740 of file frame.c.

struct ast_cli_entry my_clis[] [static]

Definition at line 1041 of file frame.c.

Referenced by init_framer().


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