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frame.c File Reference

Frame manipulation routines. More...

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include "asterisk.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"

Go to the source code of this file.

Data Structures

struct  ast_codec_alias_table
struct  ast_format_list
struct  ast_smoother

Defines

#define SMOOTHER_SIZE   8000
#define TYPE_DONTSEND   0x3
#define TYPE_HIGH   0x0
#define TYPE_LOW   0x1
#define TYPE_MASK   0x3
#define TYPE_SILENCE   0x2

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 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 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 a codec preference list up or down 65 bytes so that it becomes an ASCII string.
int ast_codec_pref_index (struct ast_codec_pref *pref, int index)
 Codec located at a particular place in the preference index.
void ast_codec_pref_remove (struct ast_codec_pref *pref, int format)
 Remove a codec from a preference list.
int ast_codec_pref_string (struct ast_codec_pref *pref, char *buf, size_t size)
 Dump codec preference list into a string.
char * ast_expand_codec_alias (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 (char *name, struct ast_frame *f, char *prefix)
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 (struct ast_frame *f)
 Copies a frame.
void ast_frfree (struct ast_frame *fr)
 Requests a frame to be allocated Frees a frame.
ast_frameast_frisolate (struct ast_frame *fr)
 Copies a frame.
ast_format_listast_get_format_list (size_t *size)
ast_format_listast_get_format_list_index (int index)
int ast_getformatbyname (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 and update the mask and pref if provided.
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)
void ast_swapcopy_samples (void *dst, const void *src, int samples)
int g723_len (unsigned char buf)
int g723_samples (unsigned char *buf, int maxlen)
unsigned char get_n_bits_at (unsigned char *data, int n, int bit)
int init_framer (void)
int show_codec_n (int fd, int argc, char *argv[])
int show_codecs (int fd, int argc, char *argv[])
int speex_get_wb_sz_at (unsigned char *data, int len, int bit)
int speex_samples (unsigned char *data, int len)

Variables

ast_codec_alias_table ast_codec_alias_table []
ast_format_list AST_FORMAT_LIST []
 Definition of supported media formats (codecs).
char frame_show_codec_n_usage []
char frame_show_codecs_usage []
ast_cli_entry my_clis []


Detailed Description

Frame manipulation routines.

Definition in file frame.c.


Define Documentation

#define SMOOTHER_SIZE   8000
 

Definition at line 50 of file frame.c.

#define TYPE_DONTSEND   0x3
 

Definition at line 55 of file frame.c.

Referenced by g723_len().

#define TYPE_HIGH   0x0
 

Definition at line 52 of file frame.c.

Referenced by g723_len().

#define TYPE_LOW   0x1
 

Definition at line 53 of file frame.c.

Referenced by g723_len().

#define TYPE_MASK   0x3
 

Definition at line 56 of file frame.c.

Referenced by g723_len().

#define TYPE_SILENCE   0x2
 

Definition at line 54 of file frame.c.

Referenced by g723_len().


Function Documentation

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

Definition at line 137 of file frame.c.

References ast_log(), ast_swapcopy_samples(), ast_smoother::data, ast_frame::data, ast_frame::datalen, ast_frame::delivery, ast_smoother::delivery, ast_smoother::flags, ast_smoother::format, ast_frame::frametype, ast_smoother::len, LOG_NOTICE, LOG_WARNING, ast_frame::offset, ast_smoother::opt, ast_smoother::optimizablestream, s, ast_frame::samples, ast_smoother::samplesperbyte, ast_smoother::size, and ast_frame::subclass.

00138 {
00139    if (f->frametype != AST_FRAME_VOICE) {
00140       ast_log(LOG_WARNING, "Huh?  Can't smooth a non-voice frame!\n");
00141       return -1;
00142    }
00143    if (!s->format) {
00144       s->format = f->subclass;
00145       s->samplesperbyte = (float)f->samples / (float)f->datalen;
00146    } else if (s->format != f->subclass) {
00147       ast_log(LOG_WARNING, "Smoother was working on %d format frames, now trying to feed %d?\n", s->format, f->subclass);
00148       return -1;
00149    }
00150    if (s->len + f->datalen > SMOOTHER_SIZE) {
00151       ast_log(LOG_WARNING, "Out of smoother space\n");
00152       return -1;
00153    }
00154    if (((f->datalen == s->size) || ((f->datalen < 10) && (s->flags & AST_SMOOTHER_FLAG_G729)))
00155              && !s->opt && (f->offset >= AST_MIN_OFFSET)) {
00156       if (!s->len) {
00157          /* Optimize by sending the frame we just got
00158             on the next read, thus eliminating the douple
00159             copy */
00160          s->opt = f;
00161          return 0;
00162       } else {
00163          s->optimizablestream++;
00164          if (s->optimizablestream > 10) {
00165             /* For the past 10 rounds, we have input and output
00166                frames of the correct size for this smoother, yet
00167                we were unable to optimize because there was still
00168                some cruft left over.  Lets just drop the cruft so
00169                we can move to a fully optimized path */
00170             s->len = 0;
00171             s->opt = f;
00172             return 0;
00173          }
00174       }
00175    } else 
00176       s->optimizablestream = 0;
00177    if (s->flags & AST_SMOOTHER_FLAG_G729) {
00178       if (s->len % 10) {
00179          ast_log(LOG_NOTICE, "Dropping extra frame of G.729 since we already have a VAD frame at the end\n");
00180          return 0;
00181       }
00182    }
00183    if (swap)
00184       ast_swapcopy_samples(s->data+s->len, f->data, f->samples);
00185    else
00186       memcpy(s->data + s->len, f->data, f->datalen);
00187    /* If either side is empty, reset the delivery time */
00188    if (!s->len || ast_tvzero(f->delivery) || ast_tvzero(s->delivery))   /* XXX really ? */
00189       s->delivery = f->delivery;
00190    s->len += f->datalen;
00191    return 0;
00192 }

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 570 of file frame.c.

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

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

00570                                {
00571    int x = 0;
00572    char *ret = "unknown";
00573    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00574       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == codec) {
00575          ret = AST_FORMAT_LIST[x].desc;
00576          break;
00577       }
00578    }
00579    return ret;
00580 }

int ast_codec_choose struct ast_codec_pref pref,
int  formats,
int  find_best
 

Select the best 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 984 of file frame.c.

References ast_best_codec(), AST_FORMAT_LIST, ast_format_list::bits, and ast_codec_pref::order.

Referenced by process_sdp(), sip_new(), and socket_read().

00985 {
00986    size_t size = 0;
00987    int x = 0, ret = 0, slot = 0;
00988 
00989    size = sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list);
00990    for (x = 0; x < size; x++) {
00991       slot = pref->order[x];
00992 
00993       if(!slot)
00994          break;
00995       if ( formats & AST_FORMAT_LIST[slot-1].bits ) {
00996          ret = AST_FORMAT_LIST[slot-1].bits;
00997          break;
00998       }
00999    }
01000    if(ret)
01001       return ret;
01002 
01003       return find_best ? ast_best_codec(formats) : 0;
01004 }

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 1225 of file frame.c.

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

Referenced by ast_channel_spy_read_frame(), copy_data_from_queue(), moh_generate(), and monmp3thread().

01226 {
01227    int len = 0;
01228 
01229    /* XXX Still need speex, g723, and lpc10 XXX */ 
01230    switch(format) {
01231    case AST_FORMAT_ILBC:
01232       len = (samples / 240) * 50;
01233       break;
01234    case AST_FORMAT_GSM:
01235       len = (samples / 160) * 33;
01236       break;
01237    case AST_FORMAT_G729A:
01238       len = samples / 8;
01239       break;
01240    case AST_FORMAT_SLINEAR:
01241       len = samples * 2;
01242       break;
01243    case AST_FORMAT_ULAW:
01244    case AST_FORMAT_ALAW:
01245       len = samples;
01246       break;
01247    case AST_FORMAT_ADPCM:
01248    case AST_FORMAT_G726:
01249       len = samples / 2;
01250       break;
01251    default:
01252       ast_log(LOG_WARNING, "Unable to calculate sample length for format %s\n", ast_getformatname(format));
01253    }
01254 
01255    return len;
01256 }

int ast_codec_get_samples struct ast_frame f  ) 
 

Returns the number of samples contained in the frame.

Definition at line 1184 of file frame.c.

References AST_FORMAT_ADPCM, AST_FORMAT_ALAW, AST_FORMAT_G723_1, AST_FORMAT_G726, 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(), ast_frame::data, ast_frame::datalen, g723_samples(), LOG_WARNING, speex_samples(), and ast_frame::subclass.

Referenced by ast_rtp_read(), moh_generate(), schedule_delivery(), and socket_read().

01185 {
01186    int samples=0;
01187    switch(f->subclass) {
01188    case AST_FORMAT_SPEEX:
01189       samples = speex_samples(f->data, f->datalen);
01190       break;
01191    case AST_FORMAT_G723_1:
01192                 samples = g723_samples(f->data, f->datalen);
01193       break;
01194    case AST_FORMAT_ILBC:
01195       samples = 240 * (f->datalen / 50);
01196       break;
01197    case AST_FORMAT_GSM:
01198       samples = 160 * (f->datalen / 33);
01199       break;
01200    case AST_FORMAT_G729A:
01201       samples = f->datalen * 8;
01202       break;
01203    case AST_FORMAT_SLINEAR:
01204       samples = f->datalen / 2;
01205       break;
01206    case AST_FORMAT_LPC10:
01207                 /* assumes that the RTP packet contains one LPC10 frame */
01208       samples = 22 * 8;
01209       samples += (((char *)(f->data))[7] & 0x1) * 8;
01210       break;
01211    case AST_FORMAT_ULAW:
01212    case AST_FORMAT_ALAW:
01213       samples = f->datalen;
01214       break;
01215    case AST_FORMAT_ADPCM:
01216    case AST_FORMAT_G726:
01217       samples = f->datalen * 2;
01218       break;
01219    default:
01220       ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(f->subclass));
01221    }
01222    return samples;
01223 }

int ast_codec_pref_append struct ast_codec_pref pref,
int  format
 

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

Definition at line 955 of file frame.c.

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

Referenced by ast_parse_allow_disallow().

00956 {
00957    size_t size = 0;
00958    int x = 0, newindex = -1;
00959 
00960    ast_codec_pref_remove(pref, format);
00961    size = sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list);
00962 
00963    for (x = 0; x < size; x++) {
00964       if(AST_FORMAT_LIST[x].bits == format) {
00965          newindex = x + 1;
00966          break;
00967       }
00968    }
00969 
00970    if(newindex) {
00971       for (x = 0; x < size; x++) {
00972          if(!pref->order[x]) {
00973             pref->order[x] = newindex;
00974             break;
00975          }
00976       }
00977    }
00978 
00979    return x;
00980 }

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

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

Definition at line 858 of file frame.c.

References ast_codec_pref::order.

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

00859 {
00860    int x = 0, differential = (int) 'A', mem = 0;
00861    char *from = NULL, *to = NULL;
00862 
00863    if(right) {
00864       from = pref->order;
00865       to = buf;
00866       mem = size;
00867    } else {
00868       to = pref->order;
00869       from = buf;
00870       mem = 32;
00871    }
00872 
00873    memset(to, 0, mem);
00874    for (x = 0; x < 32 ; x++) {
00875       if(!from[x])
00876          break;
00877       to[x] = right ? (from[x] + differential) : (from[x] - differential);
00878    }
00879 }

int ast_codec_pref_index struct ast_codec_pref pref,
int  index
 

Codec located at a particular place in the preference index.

Definition at line 916 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(), iax2_show_peer(), print_codec_to_cli(), and sip_show_user().

00917 {
00918    int slot = 0;
00919 
00920    
00921    if((index >= 0) && (index < sizeof(pref->order))) {
00922       slot = pref->order[index];
00923    }
00924 
00925    return slot ? AST_FORMAT_LIST[slot-1].bits : 0;
00926 }

void ast_codec_pref_remove struct ast_codec_pref pref,
int  format
 

Remove a codec from a preference list.

Definition at line 929 of file frame.c.

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

Referenced by ast_codec_pref_append(), and ast_parse_allow_disallow().

00930 {
00931    struct ast_codec_pref oldorder;
00932    int x=0, y=0;
00933    size_t size = 0;
00934    int slot = 0;
00935 
00936    if(!pref->order[0])
00937       return;
00938 
00939    size = sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list);
00940 
00941    memcpy(&oldorder,pref,sizeof(struct ast_codec_pref));
00942    memset(pref,0,sizeof(struct ast_codec_pref));
00943 
00944    for (x = 0; x < size; x++) {
00945       slot = oldorder.order[x];
00946       if(! slot)
00947          break;
00948       if(AST_FORMAT_LIST[slot-1].bits != format)
00949          pref->order[y++] = slot;
00950    }
00951    
00952 }

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

Dump codec preference list into a string.

Definition at line 881 of file frame.c.

References ast_codec_pref_index(), and ast_getformatname().

Referenced by dump_prefs(), and socket_read().

00882 {
00883    int x = 0, codec = 0; 
00884    size_t total_len = 0, slen = 0;
00885    char *formatname = 0;
00886    
00887    memset(buf,0,size);
00888    total_len = size;
00889    buf[0] = '(';
00890    total_len--;
00891    for(x = 0; x < 32 ; x++) {
00892       if(total_len <= 0)
00893          break;
00894       if(!(codec = ast_codec_pref_index(pref,x)))
00895          break;
00896       if((formatname = ast_getformatname(codec))) {
00897          slen = strlen(formatname);
00898          if(slen > total_len)
00899             break;
00900          strncat(buf,formatname,total_len);
00901          total_len -= slen;
00902       }
00903       if(total_len && x < 31 && ast_codec_pref_index(pref , x + 1)) {
00904          strncat(buf,"|",total_len);
00905          total_len--;
00906       }
00907    }
00908    if(total_len) {
00909       strncat(buf,")",total_len);
00910       total_len--;
00911    }
00912 
00913    return size - total_len;
00914 }

char* ast_expand_codec_alias char *  in  )  [static]
 

Definition at line 542 of file frame.c.

Referenced by ast_getformatbyname().

00542                                               {
00543    int x = 0;
00544 
00545    for (x = 0; x < sizeof(ast_codec_alias_table) / sizeof(struct ast_codec_alias_table) ; x++) {
00546       if(!strcmp(in,ast_codec_alias_table[x].alias))
00547          return ast_codec_alias_table[x].realname;
00548    }
00549    return in;
00550 }

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 1258 of file frame.c.

References ast_slinear_saturated_divide(), ast_slinear_saturated_multiply(), ast_frame::data, ast_frame::frametype, ast_frame::samples, and ast_frame::subclass.

Referenced by ast_channel_spy_read_frame(), and conf_run().

01259 {
01260    int count;
01261    short *fdata = f->data;
01262    short adjust_value = abs(adjustment);
01263 
01264    if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR))
01265       return -1;
01266 
01267    if (!adjustment)
01268       return 0;
01269 
01270    for (count = 0; count < f->samples; count++) {
01271       if (adjustment > 0) {
01272          ast_slinear_saturated_multiply(&fdata[count], &adjust_value);
01273       } else if (adjustment < 0) {
01274          ast_slinear_saturated_divide(&fdata[count], &adjust_value);
01275       }
01276    }
01277 
01278    return 0;
01279 }

void ast_frame_dump char *  name,
struct ast_frame f,
char *  prefix
 

Dump a frame for debugging purposes

Definition at line 657 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, AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_IMAGE, AST_FRAME_NULL, AST_FRAME_TEXT, 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_strlen_zero(), ast_verbose(), COLOR_BLACK, COLOR_BRCYAN, COLOR_BRGREEN, COLOR_BRMAGENTA, COLOR_BRRED, COLOR_YELLOW, ast_frame::data, ast_frame::frametype, ast_frame::subclass, and term_color().

Referenced by ast_read(), and ast_write().

00658 {
00659    char *n = "unknown";
00660    char ftype[40] = "Unknown Frametype";
00661    char cft[80];
00662    char subclass[40] = "Unknown Subclass";
00663    char csub[80];
00664    char moreinfo[40] = "";
00665    char cn[60];
00666    char cp[40];
00667    char cmn[40];
00668    if (name)
00669       n = name;
00670    if (!f) {
00671       ast_verbose("%s [ %s (NULL) ] [%s]\n", 
00672          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00673          term_color(cft, "HANGUP", COLOR_BRRED, COLOR_BLACK, sizeof(cft)), 
00674          term_color(cn, n, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00675       return;
00676    }
00677    /* XXX We should probably print one each of voice and video when the format changes XXX */
00678    if (f->frametype == AST_FRAME_VOICE)
00679       return;
00680    if (f->frametype == AST_FRAME_VIDEO)
00681       return;
00682    switch(f->frametype) {
00683    case AST_FRAME_DTMF:
00684       strcpy(ftype, "DTMF");
00685       subclass[0] = f->subclass;
00686       subclass[1] = '\0';
00687       break;
00688    case AST_FRAME_CONTROL:
00689       strcpy(ftype, "Control");
00690       switch(f->subclass) {
00691       case AST_CONTROL_HANGUP:
00692          strcpy(subclass, "Hangup");
00693          break;
00694       case AST_CONTROL_RING:
00695          strcpy(subclass, "Ring");
00696          break;
00697       case AST_CONTROL_RINGING:
00698          strcpy(subclass, "Ringing");
00699          break;
00700       case AST_CONTROL_ANSWER:
00701          strcpy(subclass, "Answer");
00702          break;
00703       case AST_CONTROL_BUSY:
00704          strcpy(subclass, "Busy");
00705          break;
00706       case AST_CONTROL_TAKEOFFHOOK:
00707          strcpy(subclass, "Take Off Hook");
00708          break;
00709       case AST_CONTROL_OFFHOOK:
00710          strcpy(subclass, "Line Off Hook");
00711          break;
00712       case AST_CONTROL_CONGESTION:
00713          strcpy(subclass, "Congestion");
00714          break;
00715       case AST_CONTROL_FLASH:
00716          strcpy(subclass, "Flash");
00717          break;
00718       case AST_CONTROL_WINK:
00719          strcpy(subclass, "Wink");
00720          break;
00721       case AST_CONTROL_OPTION:
00722          strcpy(subclass, "Option");
00723          break;
00724       case AST_CONTROL_RADIO_KEY:
00725          strcpy(subclass, "Key Radio");
00726          break;
00727       case AST_CONTROL_RADIO_UNKEY:
00728          strcpy(subclass, "Unkey Radio");
00729          break;
00730       case -1:
00731          strcpy(subclass, "Stop generators");
00732          break;
00733       default:
00734          snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass);
00735       }
00736       break;
00737    case AST_FRAME_NULL:
00738       strcpy(ftype, "Null Frame");
00739       strcpy(subclass, "N/A");
00740       break;
00741    case AST_FRAME_IAX:
00742       /* Should never happen */
00743       strcpy(ftype, "IAX Specific");
00744       snprintf(subclass, sizeof(subclass), "IAX Frametype %d", f->subclass);
00745       break;
00746    case AST_FRAME_TEXT:
00747       strcpy(ftype, "Text");
00748       strcpy(subclass, "N/A");
00749       ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00750       break;
00751    case AST_FRAME_IMAGE:
00752       strcpy(ftype, "Image");
00753       snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(f->subclass));
00754       break;
00755    case AST_FRAME_HTML:
00756       strcpy(ftype, "HTML");
00757       switch(f->subclass) {
00758       case AST_HTML_URL:
00759          strcpy(subclass, "URL");
00760          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00761          break;
00762       case AST_HTML_DATA:
00763          strcpy(subclass, "Data");
00764          break;
00765       case AST_HTML_BEGIN:
00766          strcpy(subclass, "Begin");
00767          break;
00768       case AST_HTML_END:
00769          strcpy(subclass, "End");
00770          break;
00771       case AST_HTML_LDCOMPLETE:
00772          strcpy(subclass, "Load Complete");
00773          break;
00774       case AST_HTML_NOSUPPORT:
00775          strcpy(subclass, "No Support");
00776          break;
00777       case AST_HTML_LINKURL:
00778          strcpy(subclass, "Link URL");
00779          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00780          break;
00781       case AST_HTML_UNLINK:
00782          strcpy(subclass, "Unlink");
00783          break;
00784       case AST_HTML_LINKREJECT:
00785          strcpy(subclass, "Link Reject");
00786          break;
00787       default:
00788          snprintf(subclass, sizeof(subclass), "Unknown HTML frame '%d'\n", f->subclass);
00789          break;
00790       }
00791       break;
00792    default:
00793       snprintf(ftype, sizeof(ftype), "Unknown Frametype '%d'", f->frametype);
00794    }
00795    if (!ast_strlen_zero(moreinfo))
00796       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) '%s' ] [%s]\n",  
00797          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00798          term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00799          f->frametype, 
00800          term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00801          f->subclass, 
00802          term_color(cmn, moreinfo, COLOR_BRGREEN, COLOR_BLACK, sizeof(cmn)),
00803          term_color(cn, n, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00804    else
00805       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) ] [%s]\n",  
00806          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00807          term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00808          f->frametype, 
00809          term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00810          f->subclass, 
00811          term_color(cn, n, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00812 
00813 }

struct ast_frame* ast_frame_header_new void   )  [static]
 

Definition at line 248 of file frame.c.

References ast_mutex_lock(), ast_mutex_unlock(), malloc, ast_frame::next, and ast_frame::prev.

Referenced by ast_frisolate().

00249 {
00250    struct ast_frame *f;
00251    f = malloc(sizeof(struct ast_frame));
00252    if (f)
00253       memset(f, 0, sizeof(struct ast_frame));
00254 #ifdef TRACE_FRAMES
00255    if (f) {
00256       headers++;
00257       f->prev = NULL;
00258       ast_mutex_lock(&framelock);
00259       f->next = headerlist;
00260       if (headerlist)
00261          headerlist->prev = f;
00262       headerlist = f;
00263       ast_mutex_unlock(&framelock);
00264    }
00265 #endif   
00266    return f;
00267 }

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 1281 of file frame.c.

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

Referenced by ast_channel_spy_read_frame().

01282 {
01283    int count;
01284    short *data1, *data2;
01285 
01286    if ((f1->frametype != AST_FRAME_VOICE) || (f1->subclass != AST_FORMAT_SLINEAR))
01287       return -1;
01288 
01289    if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass != AST_FORMAT_SLINEAR))
01290       return -1;
01291 
01292    if (f1->samples != f2->samples)
01293       return -1;
01294 
01295    for (count = 0, data1 = f1->data, data2 = f2->data;
01296         count < f1->samples;
01297         count++, data1++, data2++)
01298       ast_slinear_saturated_add(data1, data2);
01299 
01300    return 0;
01301 }

struct ast_frame* ast_frdup struct ast_frame fr  ) 
 

Copies a frame.

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

Definition at line 345 of file frame.c.

References AST_FRIENDLY_OFFSET, ast_frame::data, ast_frame::datalen, ast_frame::delivery, ast_frame::frametype, malloc, ast_frame::mallocd, ast_frame::next, ast_frame::offset, ast_frame::prev, ast_frame::samples, ast_frame::src, and ast_frame::subclass.

Referenced by ast_channel_spy_read_frame(), ast_queue_frame(), ast_rtp_write(), ast_slinfactory_feed(), and queue_frame_to_spies().

00346 {
00347    struct ast_frame *out;
00348    int len, srclen = 0;
00349    void *buf;
00350    /* Start with standard stuff */
00351    len = sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET + f->datalen;
00352    /* If we have a source, add space for it */
00353    /*
00354     * XXX Watch out here - if we receive a src which is not terminated
00355     * properly, we can be easily attacked. Should limit the size we deal with.
00356     */
00357    if (f->src)
00358       srclen = strlen(f->src);
00359    if (srclen > 0)
00360       len += srclen + 1;
00361    buf = malloc(len);
00362    if (!buf)
00363       return NULL;
00364    out = buf;
00365    /* Set us as having malloc'd header only, so it will eventually
00366       get freed. */
00367    out->frametype = f->frametype;
00368    out->subclass = f->subclass;
00369    out->datalen = f->datalen;
00370    out->samples = f->samples;
00371    out->delivery = f->delivery;
00372    out->mallocd = AST_MALLOCD_HDR;
00373    out->offset = AST_FRIENDLY_OFFSET;
00374    out->data = buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
00375    if (srclen > 0) {
00376       out->src = out->data + f->datalen;
00377       /* Must have space since we allocated for it */
00378       strcpy((char *)out->src, f->src);
00379    } else
00380       out->src = NULL;
00381    out->prev = NULL;
00382    out->next = NULL;
00383    memcpy(out->data, f->data, out->datalen); 
00384    return out;
00385 }

void ast_frfree struct ast_frame fr  ) 
 

Requests a frame to be allocated Frees a frame.

Todo:
Important: I should be made more efficient. Frame headers should most definitely be cached

Definition at line 273 of file frame.c.

References ast_mutex_lock(), ast_mutex_unlock(), ast_frame::data, free, ast_frame::mallocd, ast_frame::next, ast_frame::offset, ast_frame::prev, and ast_frame::src.

Referenced by __adsi_transmit_messages(), __ast_request_and_dial(), adsi_careful_send(), agent_ack_sleep(), agent_read(), app_exec(), ast_app_getvoice(), ast_bridge_call(), ast_channel_free(), ast_channel_spy_read_frame(), ast_channel_spy_remove(), ast_dsp_process(), ast_feature_request_and_dial(), ast_generic_bridge(), ast_masq_park_call(), ast_play_and_prepend(), ast_play_and_record(), ast_queue_frame(), ast_read(), ast_recvtext(), ast_rtp_bridge(), ast_safe_sleep(), ast_safe_sleep_conditional(), ast_send_image(), ast_slinfactory_destroy(), ast_slinfactory_read(), ast_tonepair(), ast_translate(), ast_waitfordigit(), ast_waitfordigit_full(), ast_waitstream(), ast_waitstream_exten(), ast_waitstream_fr(), ast_waitstream_full(), ast_write(), async_wait(), autoservice_run(), background_detect_exec(), builtin_atxfer(), calc_cost(), channel_spy(), check_goto_on_transfer(), conf_exec(), conf_flush(), conf_run(), copy_data_from_queue(), dictate_exec(), disa_exec(), do_parking_thread(), do_waiting(), echo_exec(), find_cache(), gen_generate(), handle_recordfile(), iax2_bridge(), iax_park_thread(), ices_exec(), mixmonitor_thread(), moh_files_generator(), mp3_exec(), NBScat_exec(), queue_frame_to_spies(), receive_dtmf_digits(), record_exec(), recordthread(), rpt(), rpt_exec(), run_agi(), send_tone_burst(), send_waveform_to_channel(), sendurl_exec(), sms_exec(), spy_generate(), ss_thread(), vpb_bridge(), wait_for_answer(), wait_for_hangup(), waitforring_exec(), and zt_bridge().

00274 {
00275    if (fr->mallocd & AST_MALLOCD_DATA) {
00276       if (fr->data) 
00277          free(fr->data - fr->offset);
00278    }
00279    if (fr->mallocd & AST_MALLOCD_SRC) {
00280       if (fr->src)
00281          free((char *)fr->src);
00282    }
00283    if (fr->mallocd & AST_MALLOCD_HDR) {
00284 #ifdef TRACE_FRAMES
00285       headers--;
00286       ast_mutex_lock(&framelock);
00287       if (fr->next)
00288          fr->next->prev = fr->prev;
00289       if (fr->prev)
00290          fr->prev->next = fr->next;
00291       else
00292          headerlist = fr->next;
00293       ast_mutex_unlock(&framelock);
00294 #endif         
00295       free(fr);
00296    }
00297 }

struct ast_frame* ast_frisolate struct ast_frame fr  ) 
 

Copies a frame.

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 304 of file frame.c.

References ast_frame_header_new(), AST_FRIENDLY_OFFSET, ast_log(), AST_MALLOCD_HDR, AST_MALLOCD_SRC, ast_frame::data, ast_frame::datalen, ast_frame::frametype, free, LOG_WARNING, malloc, ast_frame::mallocd, ast_frame::offset, ast_frame::samples, ast_frame::src, strdup, and ast_frame::subclass.

Referenced by jpeg_read_image(), and monitor_handle_owned().

00305 {
00306    struct ast_frame *out;
00307    if (!(fr->mallocd & AST_MALLOCD_HDR)) {
00308       /* Allocate a new header if needed */
00309       out = ast_frame_header_new();
00310       if (!out) {
00311          ast_log(LOG_WARNING, "Out of memory\n");
00312          return NULL;
00313       }
00314       out->frametype = fr->frametype;
00315       out->subclass = fr->subclass;
00316       out->datalen = fr->datalen;
00317       out->samples = fr->samples;
00318       out->offset = fr->offset;
00319       out->src = NULL;
00320       out->data = fr->data;
00321    } else {
00322       out = fr;
00323    }
00324    if (!(fr->mallocd & AST_MALLOCD_SRC)) {
00325       if (fr->src)
00326          out->src = strdup(fr->src);
00327    } else
00328       out->src = fr->src;
00329    if (!(fr->mallocd & AST_MALLOCD_DATA))  {
00330       out->data = malloc(fr->datalen + AST_FRIENDLY_OFFSET);
00331       if (!out->data) {
00332          free(out);
00333          ast_log(LOG_WARNING, "Out of memory\n");
00334          return NULL;
00335       }
00336       out->data += AST_FRIENDLY_OFFSET;
00337       out->offset = AST_FRIENDLY_OFFSET;
00338       out->datalen = fr->datalen;
00339       memcpy(out->data, fr->data, fr->datalen);
00340    }
00341    out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
00342    return out;
00343 }

struct ast_format_list* ast_get_format_list size_t *  size  ) 
 

Definition at line 487 of file frame.c.

00488 {
00489    *size = (sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list));
00490    return AST_FORMAT_LIST;
00491 }

struct ast_format_list* ast_get_format_list_index int  index  ) 
 

Definition at line 482 of file frame.c.

References AST_FORMAT_LIST.

00483 {
00484    return &AST_FORMAT_LIST[index];
00485 }

int ast_getformatbyname 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 552 of file frame.c.

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

Referenced by ast_parse_allow_disallow(), iax_template_parse(), load_moh_classes(), reload_config(), sip_answer(), and update_common_options().

00553 {
00554    int x = 0, all = 0, format = 0;
00555 
00556    all = strcasecmp(name, "all") ? 0 : 1;
00557    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00558       if(AST_FORMAT_LIST[x].visible && (all || 
00559                                 !strcasecmp(AST_FORMAT_LIST[x].name,name) ||
00560                                 !strcasecmp(AST_FORMAT_LIST[x].name,ast_expand_codec_alias(name)))) {
00561          format |= AST_FORMAT_LIST[x].bits;
00562          if(!all)
00563             break;
00564       }
00565    }
00566 
00567    return format;
00568 }

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 "UNKN" if unknown.

Definition at line 493 of file frame.c.

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

Referenced by __login_exec(), __sip_show_channels(), _sip_show_peer(), add_codec_to_sdp(), agent_call(), ast_channel_spy_add(), ast_codec_get_len(), ast_codec_get_samples(), ast_codec_pref_string(), ast_dsp_process(), ast_frame_dump(), ast_play_and_prepend(), ast_play_and_record(), ast_read(), ast_register_translator(), ast_rtp_write(), ast_slinfactory_feed(), ast_streamfile(), ast_translator_build_path(), ast_unregister_translator(), ast_writestream(), background_detect_exec(), do_waiting(), eagi_exec(), function_iaxpeer(), function_sippeer(), iax2_request(), iax2_show_channels(), iax2_show_peer(), iax_show_provisioning(), modem_request(), moh_classes_show(), moh_release(), phone_setup(), print_codec_to_cli(), queue_frame_to_spies(), rebuild_matrix(), set_format(), show_codecs(), show_file_formats(), show_image_formats(), show_translation(), sip_request_call(), sip_show_channel(), sip_show_user(), socket_read(), and zt_read().

00494 {
00495    int x = 0;
00496    char *ret = "unknown";
00497    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00498       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == format) {
00499          ret = AST_FORMAT_LIST[x].name;
00500          break;
00501       }
00502    }
00503    return ret;
00504 }

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 506 of file frame.c.

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

Referenced by _sip_show_peer(), function_iaxpeer(), function_sippeer(), iax2_bridge(), iax2_show_peer(), and process_sdp().

00506                                                                      {
00507 
00508    int x = 0;
00509    unsigned len;
00510    char *end = buf;
00511    char *start = buf;
00512    if (!size) return buf;
00513    snprintf(end, size, "0x%x (", format);
00514    len = strlen(end);
00515    end += len;
00516    size -= len;
00517    start = end;
00518    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00519       if (AST_FORMAT_LIST[x].visible && (AST_FORMAT_LIST[x].bits & format)) {
00520          snprintf(end, size,"%s|",AST_FORMAT_LIST[x].name);
00521          len = strlen(end);
00522          end += len;
00523          size -= len;
00524       }
00525    }
00526    if (start == end)
00527       snprintf(start, size, "nothing)");
00528    else if (size > 1)
00529       *(end -1) = ')';
00530    return buf;
00531 }

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

Parse an "allow" or "deny" line and update the mask and pref if provided.

Definition at line 1006 of file frame.c.

References ast_codec_pref_append(), ast_codec_pref_remove(), ast_getformatbyname(), ast_log(), ast_strdupa, LOG_WARNING, and strsep().

Referenced by build_peer(), build_user(), reload_config(), and set_config().

01007 {
01008    char *parse;
01009    char *this;
01010    int format;
01011 
01012    parse = ast_strdupa(list);
01013    while ((this = strsep(&parse, ","))) {
01014       if (!(format = ast_getformatbyname(this))) {
01015          ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", allowing ? "allow" : "disallow", this);
01016          continue;
01017       }
01018 
01019       if (mask) {
01020          if (allowing)
01021             *mask |= format;
01022          else
01023             *mask &= ~format;
01024       }
01025 
01026       if (pref) {
01027          if (strcasecmp(this, "all")) {
01028             if (allowing)
01029                ast_codec_pref_append(pref, format);
01030             else
01031                ast_codec_pref_remove(pref, format);
01032          } else if (!allowing) {
01033             memset(pref, 0, sizeof(*pref));
01034          }
01035       }
01036    }
01037 }

void ast_smoother_free struct ast_smoother s  ) 
 

Definition at line 243 of file frame.c.

References free, and s.

Referenced by ast_rtp_destroy(), and ast_rtp_write().

00244 {
00245    free(s);
00246 }

int ast_smoother_get_flags struct ast_smoother s  ) 
 

Definition at line 127 of file frame.c.

References ast_smoother::flags, and s.

00128 {
00129    return s->flags;
00130 }

struct ast_smoother* ast_smoother_new int  size  ) 
 

Definition at line 116 of file frame.c.

References ast_smoother_reset(), malloc, and s.

Referenced by ast_rtp_write().

00117 {
00118    struct ast_smoother *s;
00119    if (size < 1)
00120       return NULL;
00121    s = malloc(sizeof(struct ast_smoother));
00122    if (s)
00123       ast_smoother_reset(s, size);
00124    return s;
00125 }

struct ast_frame* ast_smoother_read struct ast_smoother s  ) 
 

Definition at line 194 of file frame.c.

References ast_log(), ast_tvadd(), ast_frame::data, ast_smoother::data, ast_frame::datalen, ast_frame::delivery, ast_smoother::delivery, ast_smoother::f, ast_smoother::flags, ast_smoother::format, ast_smoother::framedata, ast_frame::frametype, ast_smoother::len, LOG_WARNING, ast_frame::offset, ast_smoother::opt, s, ast_frame::samples, ast_smoother::samplesperbyte, ast_smoother::size, and ast_frame::subclass.

Referenced by ast_rtp_write().

00195 {
00196    struct ast_frame *opt;
00197    int len;
00198    /* IF we have an optimization frame, send it */
00199    if (s->opt) {
00200       if (s->opt->offset < AST_FRIENDLY_OFFSET)
00201          ast_log(LOG_WARNING, "Returning a frame of inappropriate offset (%d).",
00202                      s->opt->offset);
00203       opt = s->opt;
00204       s->opt = NULL;
00205       return opt;
00206    }
00207 
00208    /* Make sure we have enough data */
00209    if (s->len < s->size) {
00210       /* Or, if this is a G.729 frame with VAD on it, send it immediately anyway */
00211       if (!((s->flags & AST_SMOOTHER_FLAG_G729) && (s->size % 10)))
00212          return NULL;
00213    }
00214    len = s->size;
00215    if (len > s->len)
00216       len = s->len;
00217    /* Make frame */
00218    s->f.frametype = AST_FRAME_VOICE;
00219    s->f.subclass = s->format;
00220    s->f.data = s->framedata + AST_FRIENDLY_OFFSET;
00221    s->f.offset = AST_FRIENDLY_OFFSET;
00222    s->f.datalen = len;
00223    /* Samples will be improper given VAD, but with VAD the concept really doesn't even exist */
00224    s->f.samples = len * s->samplesperbyte;   /* XXX rounding */
00225    s->f.delivery = s->delivery;
00226    /* Fill Data */
00227    memcpy(s->f.data, s->data, len);
00228    s->len -= len;
00229    /* Move remaining data to the front if applicable */
00230    if (s->len) {
00231       /* In principle this should all be fine because if we are sending
00232          G.729 VAD, the next timestamp will take over anyawy */
00233       memmove(s->data, s->data + len, s->len);
00234       if (!ast_tvzero(s->delivery)) {
00235          /* If we have delivery time, increment it, otherwise, leave it at 0 */
00236          s->delivery = ast_tvadd(s->delivery, ast_samp2tv(s->f.samples, 8000));
00237       }
00238    }
00239    /* Return frame */
00240    return &s->f;
00241 }

void ast_smoother_reset struct ast_smoother s,
int  size
 

Definition at line 110 of file frame.c.

References s, and ast_smoother::size.

Referenced by ast_smoother_new().

00111 {
00112    memset(s, 0, sizeof(struct ast_smoother));
00113    s->size = size;
00114 }

void ast_smoother_set_flags struct ast_smoother s,
int  flags
 

Definition at line 132 of file frame.c.

References ast_smoother::flags, and s.

Referenced by ast_rtp_write().

00133 {
00134    s->flags = flags;
00135 }

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

Definition at line 471 of file frame.c.

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

00472 {
00473    int i;
00474    unsigned short *dst_s = dst;
00475    const unsigned short *src_s = src;
00476 
00477    for (i=0; i<samples; i++)
00478       dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
00479 }

int g723_len unsigned char  buf  )  [static]
 

Definition at line 1039 of file frame.c.

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

01040 {
01041    switch(buf & TYPE_MASK) {
01042    case TYPE_DONTSEND:
01043       return 0;
01044       break;
01045    case TYPE_SILENCE:
01046       return 4;
01047       break;
01048    case TYPE_HIGH:
01049       return 24;
01050       break;
01051    case TYPE_LOW:
01052       return 20;
01053       break;
01054    default:
01055       ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", buf & TYPE_MASK);
01056    }
01057    return -1;
01058 }

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

Definition at line 1060 of file frame.c.

References g723_len().

Referenced by ast_codec_get_samples().

01061 {
01062    int pos = 0;
01063    int samples = 0;
01064    int res;
01065    while(pos < maxlen) {
01066       res = g723_len(buf[pos]);
01067       if (res <= 0)
01068          break;
01069       samples += 240;
01070       pos += res;
01071    }
01072    return samples;
01073 }

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

Definition at line 1075 of file frame.c.

Referenced by speex_get_wb_sz_at(), and speex_samples().

01076 {
01077    int byte = bit / 8;       /* byte containing first bit */
01078    int rem = 8 - (bit % 8);  /* remaining bits in first byte */
01079    unsigned char ret = 0;
01080    
01081    if (n <= 0 || n > 8)
01082       return 0;
01083 
01084    if (rem < n) {
01085       ret = (data[byte] << (n - rem));
01086       ret |= (data[byte + 1] >> (8 - n + rem));
01087    } else {
01088       ret = (data[byte] >> (rem - n));
01089    }
01090 
01091    return (ret & (0xff >> (8 - n)));
01092 }

int init_framer void   ) 
 

Definition at line 852 of file frame.c.

References ast_cli_register_multiple(), and my_clis.

Referenced by main().

00853 {
00854    ast_cli_register_multiple(my_clis, sizeof(my_clis)/sizeof(my_clis[0]) );
00855    return 0;   
00856 }

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

Definition at line 630 of file frame.c.

References ast_cli(), and ast_codec2str().

00631 {
00632    int codec, i, found=0;
00633 
00634    if (argc != 3)
00635       return RESULT_SHOWUSAGE;
00636 
00637    if (sscanf(argv[2],"%d",&codec) != 1)
00638       return RESULT_SHOWUSAGE;
00639 
00640    for (i=0;i<32;i++)
00641       if (codec & (1 << i)) {
00642          found = 1;
00643          ast_cli(fd, "%11u (1 << %2d)  %s\n",1 << i,i,ast_codec2str(1<<i));
00644       }
00645 
00646    if (! found)
00647       ast_cli(fd, "Codec %d not found\n", codec);
00648 
00649    return RESULT_SUCCESS;
00650 }

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

Definition at line 582 of file frame.c.

References ast_cli(), ast_codec2str(), and ast_getformatname().

00583 {
00584    int i, found=0;
00585    char hex[25];
00586    
00587    if ((argc < 2) || (argc > 3))
00588       return RESULT_SHOWUSAGE;
00589 
00590    if (!option_dontwarn)
00591       ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n"
00592             "\tIt does not indicate anything about your configuration.\n");
00593 
00594    ast_cli(fd, "%11s %9s %10s   TYPE   %5s   %s\n","INT","BINARY","HEX","NAME","DESC");
00595    ast_cli(fd, "--------------------------------------------------------------------------------\n");
00596    if ((argc == 2) || (!strcasecmp(argv[1],"audio"))) {
00597       found = 1;
00598       for (i=0;i<11;i++) {
00599          snprintf(hex,25,"(0x%x)",1<<i);
00600          ast_cli(fd, "%11u (1 << %2d) %10s  audio   %5s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00601       }
00602    }
00603 
00604    if ((argc == 2) || (!strcasecmp(argv[1],"image"))) {
00605       found = 1;
00606       for (i=16;i<18;i++) {
00607          snprintf(hex,25,"(0x%x)",1<<i);
00608          ast_cli(fd, "%11u (1 << %2d) %10s  image   %5s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00609       }
00610    }
00611 
00612    if ((argc == 2) || (!strcasecmp(argv[1],"video"))) {
00613       found = 1;
00614       for (i=18;i<21;i++) {
00615          snprintf(hex,25,"(0x%x)",1<<i);
00616          ast_cli(fd, "%11u (1 << %2d) %10s  video   %5s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00617       }
00618    }
00619 
00620    if (! found)
00621       return RESULT_SHOWUSAGE;
00622    else
00623       return RESULT_SUCCESS;
00624 }

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

Definition at line 1094 of file frame.c.

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

Referenced by speex_samples().

01095 {
01096    static int SpeexWBSubModeSz[] = {
01097       0, 36, 112, 192,
01098       352, 0, 0, 0 };
01099    int off = bit;
01100    unsigned char c;
01101 
01102    /* skip up to two wideband frames */
01103    if (((len * 8 - off) >= 5) && 
01104       get_n_bits_at(data, 1, off)) {
01105       c = get_n_bits_at(data, 3, off + 1);
01106       off += SpeexWBSubModeSz[c];
01107 
01108       if (((len * 8 - off) >= 5) && 
01109          get_n_bits_at(data, 1, off)) {
01110          c = get_n_bits_at(data, 3, off + 1);
01111          off += SpeexWBSubModeSz[c];
01112 
01113          if (((len * 8 - off) >= 5) && 
01114             get_n_bits_at(data, 1, off)) {
01115             ast_log(LOG_WARNING, "Encountered corrupt speex frame; too many wideband frames in a row.\n");
01116             return -1;
01117          }
01118       }
01119 
01120    }
01121    return off - bit;
01122 }

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

Definition at line 1124 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().

01125 {
01126    static int SpeexSubModeSz[] = {
01127                5, 43, 119, 160,
01128       220, 300, 364, 492, 
01129       79, 0, 0, 0,
01130       0, 0, 0, 0 };
01131    static int SpeexInBandSz[] = { 
01132       1, 1, 4, 4,
01133       4, 4, 4, 4,
01134       8, 8, 16, 16,
01135       32, 32, 64, 64 };
01136    int bit = 0;
01137    int cnt = 0;
01138    int off = 0;
01139    unsigned char c;
01140 
01141    while ((len * 8 - bit) >= 5) {
01142       /* skip wideband frames */
01143       off = speex_get_wb_sz_at(data, len, bit);
01144       if (off < 0)  {
01145          ast_log(LOG_WARNING, "Had error while reading wideband frames for speex samples\n");
01146          break;
01147       }
01148       bit += off;
01149 
01150       if ((len * 8 - bit) < 5) {
01151          ast_log(LOG_WARNING, "Not enough bits remaining after wide band for speex samples.\n");
01152          break;
01153       }
01154 
01155       /* get control bits */
01156       c = get_n_bits_at(data, 5, bit);
01157       bit += 5;
01158 
01159       if (c == 15) { 
01160          /* terminator */
01161          break; 
01162       } else if (c == 14) {
01163          /* in-band signal; next 4 bits contain signal id */
01164          c = get_n_bits_at(data, 4, bit);
01165          bit += 4;
01166          bit += SpeexInBandSz[c];
01167       } else if (c == 13) {
01168          /* user in-band; next 5 bits contain msg len */
01169          c = get_n_bits_at(data, 5, bit);
01170          bit += 5;
01171          bit += c * 8;
01172       } else if (c > 8) {
01173          /* unknown */
01174          break;
01175       } else {
01176          /* skip number bits for submode (less the 5 control bits) */
01177          bit += SpeexSubModeSz[c] - 5;
01178          cnt += 160; /* new frame */
01179       }
01180    }
01181    return cnt;
01182 }


Variable Documentation

struct ast_codec_alias_table ast_codec_alias_table[] [static]
 

struct ast_format_list AST_FORMAT_LIST[] [static]
 

Definition of supported media formats (codecs).

Definition at line 81 of file frame.c.

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

char frame_show_codec_n_usage[] [static]
 

Initial value:

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

Definition at line 652 of file frame.c.

char frame_show_codecs_usage[] [static]
 

Initial value:

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

Definition at line 626 of file frame.c.

struct ast_cli_entry my_clis[] [static]
 

Definition at line 841 of file frame.c.

Referenced by init_framer().


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