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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"

Include dependency graph for frame.c:

Go to the source code of this file.

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.
static 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)
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 (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)
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_codecs (int fd, int argc, char *argv[])
static int speex_get_wb_sz_at (unsigned char *data, int len, int bit)
static int speex_samples (unsigned char *data, int len)

Variables

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

Referenced by __ast_smoother_feed().

#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_FRAME_VOICE, ast_log(), AST_MIN_OFFSET, AST_SMOOTHER_FLAG_G729, 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, ast_frame::samples, ast_smoother::samplesperbyte, ast_smoother::size, 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 586 of file frame.c.

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

00586                                {
00587    int x = 0;
00588    char *ret = "unknown";
00589    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00590       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == codec) {
00591          ret = AST_FORMAT_LIST[x].desc;
00592          break;
00593       }
00594    }
00595    return ret;
00596 }

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 1000 of file frame.c.

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

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

01001 {
01002    size_t size = 0;
01003    int x = 0, ret = 0, slot = 0;
01004 
01005    size = sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list);
01006    for (x = 0; x < size; x++) {
01007       slot = pref->order[x];
01008 
01009       if(!slot)
01010          break;
01011       if ( formats & AST_FORMAT_LIST[slot-1].bits ) {
01012          ret = AST_FORMAT_LIST[slot-1].bits;
01013          break;
01014       }
01015    }
01016    if(ret)
01017       return ret;
01018 
01019       return find_best ? ast_best_codec(formats) : 0;
01020 }

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 1241 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().

01242 {
01243    int len = 0;
01244 
01245    /* XXX Still need speex, g723, and lpc10 XXX */ 
01246    switch(format) {
01247    case AST_FORMAT_ILBC:
01248       len = (samples / 240) * 50;
01249       break;
01250    case AST_FORMAT_GSM:
01251       len = (samples / 160) * 33;
01252       break;
01253    case AST_FORMAT_G729A:
01254       len = samples / 8;
01255       break;
01256    case AST_FORMAT_SLINEAR:
01257       len = samples * 2;
01258       break;
01259    case AST_FORMAT_ULAW:
01260    case AST_FORMAT_ALAW:
01261       len = samples;
01262       break;
01263    case AST_FORMAT_ADPCM:
01264    case AST_FORMAT_G726:
01265       len = samples / 2;
01266       break;
01267    default:
01268       ast_log(LOG_WARNING, "Unable to calculate sample length for format %s\n", ast_getformatname(format));
01269    }
01270 
01271    return len;
01272 }

int ast_codec_get_samples struct ast_frame f  ) 
 

Returns the number of samples contained in the frame.

Definition at line 1200 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().

01201 {
01202    int samples=0;
01203    switch(f->subclass) {
01204    case AST_FORMAT_SPEEX:
01205       samples = speex_samples(f->data, f->datalen);
01206       break;
01207    case AST_FORMAT_G723_1:
01208                 samples = g723_samples(f->data, f->datalen);
01209       break;
01210    case AST_FORMAT_ILBC:
01211       samples = 240 * (f->datalen / 50);
01212       break;
01213    case AST_FORMAT_GSM:
01214       samples = 160 * (f->datalen / 33);
01215       break;
01216    case AST_FORMAT_G729A:
01217       samples = f->datalen * 8;
01218       break;
01219    case AST_FORMAT_SLINEAR:
01220       samples = f->datalen / 2;
01221       break;
01222    case AST_FORMAT_LPC10:
01223                 /* assumes that the RTP packet contains one LPC10 frame */
01224       samples = 22 * 8;
01225       samples += (((char *)(f->data))[7] & 0x1) * 8;
01226       break;
01227    case AST_FORMAT_ULAW:
01228    case AST_FORMAT_ALAW:
01229       samples = f->datalen;
01230       break;
01231    case AST_FORMAT_ADPCM:
01232    case AST_FORMAT_G726:
01233       samples = f->datalen * 2;
01234       break;
01235    default:
01236       ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(f->subclass));
01237    }
01238    return samples;
01239 }

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 971 of file frame.c.

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

Referenced by ast_parse_allow_disallow().

00972 {
00973    size_t size = 0;
00974    int x = 0, newindex = -1;
00975 
00976    ast_codec_pref_remove(pref, format);
00977    size = sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list);
00978 
00979    for (x = 0; x < size; x++) {
00980       if(AST_FORMAT_LIST[x].bits == format) {
00981          newindex = x + 1;
00982          break;
00983       }
00984    }
00985 
00986    if(newindex) {
00987       for (x = 0; x < size; x++) {
00988          if(!pref->order[x]) {
00989             pref->order[x] = newindex;
00990             break;
00991          }
00992       }
00993    }
00994 
00995    return x;
00996 }

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 874 of file frame.c.

References ast_codec_pref::order.

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

00875 {
00876    int x = 0, differential = (int) 'A', mem = 0;
00877    char *from = NULL, *to = NULL;
00878 
00879    if(right) {
00880       from = pref->order;
00881       to = buf;
00882       mem = size;
00883    } else {
00884       to = pref->order;
00885       from = buf;
00886       mem = 32;
00887    }
00888 
00889    memset(to, 0, mem);
00890    for (x = 0; x < 32 ; x++) {
00891       if(!from[x])
00892          break;
00893       to[x] = right ? (from[x] + differential) : (from[x] - differential);
00894    }
00895 }

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 932 of file frame.c.

References 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(), sip_show_user(), and socket_read().

00933 {
00934    int slot = 0;
00935 
00936    
00937    if((index >= 0) && (index < sizeof(pref->order))) {
00938       slot = pref->order[index];
00939    }
00940 
00941    return slot ? AST_FORMAT_LIST[slot-1].bits : 0;
00942 }

void ast_codec_pref_remove struct ast_codec_pref pref,
int  format
 

Remove a codec from a preference list.

Definition at line 945 of file frame.c.

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

Referenced by ast_codec_pref_append(), and ast_parse_allow_disallow().

00946 {
00947    struct ast_codec_pref oldorder;
00948    int x=0, y=0;
00949    size_t size = 0;
00950    int slot = 0;
00951 
00952    if(!pref->order[0])
00953       return;
00954 
00955    size = sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list);
00956 
00957    memcpy(&oldorder,pref,sizeof(struct ast_codec_pref));
00958    memset(pref,0,sizeof(struct ast_codec_pref));
00959 
00960    for (x = 0; x < size; x++) {
00961       slot = oldorder.order[x];
00962       if(! slot)
00963          break;
00964       if(AST_FORMAT_LIST[slot-1].bits != format)
00965          pref->order[y++] = slot;
00966    }
00967    
00968 }

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 897 of file frame.c.

References ast_codec_pref_index(), and ast_getformatname().

Referenced by dump_prefs(), and socket_read().

00898 {
00899    int x = 0, codec = 0; 
00900    size_t total_len = 0, slen = 0;
00901    char *formatname = 0;
00902    
00903    memset(buf,0,size);
00904    total_len = size;
00905    buf[0] = '(';
00906    total_len--;
00907    for(x = 0; x < 32 ; x++) {
00908       if(total_len <= 0)
00909          break;
00910       if(!(codec = ast_codec_pref_index(pref,x)))
00911          break;
00912       if((formatname = ast_getformatname(codec))) {
00913          slen = strlen(formatname);
00914          if(slen > total_len)
00915             break;
00916          strncat(buf,formatname,total_len);
00917          total_len -= slen;
00918       }
00919       if(total_len && x < 31 && ast_codec_pref_index(pref , x + 1)) {
00920          strncat(buf,"|",total_len);
00921          total_len--;
00922       }
00923    }
00924    if(total_len) {
00925       strncat(buf,")",total_len);
00926       total_len--;
00927    }
00928 
00929    return size - total_len;
00930 }

static char* ast_expand_codec_alias char *  in  )  [static]
 

Definition at line 558 of file frame.c.

Referenced by ast_getformatbyname().

00558                                               {
00559    int x = 0;
00560 
00561    for (x = 0; x < sizeof(ast_codec_alias_table) / sizeof(struct ast_codec_alias_table) ; x++) {
00562       if(!strcmp(in,ast_codec_alias_table[x].alias))
00563          return ast_codec_alias_table[x].realname;
00564    }
00565    return in;
00566 }

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 1274 of file frame.c.

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

Referenced by ast_channel_spy_read_frame(), and conf_run().

01275 {
01276    int count;
01277    short *fdata = f->data;
01278    short adjust_value = abs(adjustment);
01279 
01280    if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR))
01281       return -1;
01282 
01283    if (!adjustment)
01284       return 0;
01285 
01286    for (count = 0; count < f->samples; count++) {
01287       if (adjustment > 0) {
01288          ast_slinear_saturated_multiply(&fdata[count], &adjust_value);
01289       } else if (adjustment < 0) {
01290          ast_slinear_saturated_divide(&fdata[count], &adjust_value);
01291       }
01292    }
01293 
01294    return 0;
01295 }

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

Dump a frame for debugging purposes

Definition at line 673 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_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_strlen_zero(), ast_verbose(), COLOR_BLACK, COLOR_BRCYAN, COLOR_BRGREEN, COLOR_BRMAGENTA, COLOR_BRRED, COLOR_YELLOW, ast_frame::data, ast_frame::frametype, n, ast_frame::subclass, and term_color().

Referenced by ast_read(), and ast_write().

00674 {
00675    char *n = "unknown";
00676    char ftype[40] = "Unknown Frametype";
00677    char cft[80];
00678    char subclass[40] = "Unknown Subclass";
00679    char csub[80];
00680    char moreinfo[40] = "";
00681    char cn[60];
00682    char cp[40];
00683    char cmn[40];
00684    if (name)
00685       n = name;
00686    if (!f) {
00687       ast_verbose("%s [ %s (NULL) ] [%s]\n", 
00688          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00689          term_color(cft, "HANGUP", COLOR_BRRED, COLOR_BLACK, sizeof(cft)), 
00690          term_color(cn, n, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00691       return;
00692    }
00693    /* XXX We should probably print one each of voice and video when the format changes XXX */
00694    if (f->frametype == AST_FRAME_VOICE)
00695       return;
00696    if (f->frametype == AST_FRAME_VIDEO)
00697       return;
00698    switch(f->frametype) {
00699    case AST_FRAME_DTMF:
00700       strcpy(ftype, "DTMF");
00701       subclass[0] = f->subclass;
00702       subclass[1] = '\0';
00703       break;
00704    case AST_FRAME_CONTROL:
00705       strcpy(ftype, "Control");
00706       switch(f->subclass) {
00707       case AST_CONTROL_HANGUP:
00708          strcpy(subclass, "Hangup");
00709          break;
00710       case AST_CONTROL_RING:
00711          strcpy(subclass, "Ring");
00712          break;
00713       case AST_CONTROL_RINGING:
00714          strcpy(subclass, "Ringing");
00715          break;
00716       case AST_CONTROL_ANSWER:
00717          strcpy(subclass, "Answer");
00718          break;
00719       case AST_CONTROL_BUSY:
00720          strcpy(subclass, "Busy");
00721          break;
00722       case AST_CONTROL_TAKEOFFHOOK:
00723          strcpy(subclass, "Take Off Hook");
00724          break;
00725       case AST_CONTROL_OFFHOOK:
00726          strcpy(subclass, "Line Off Hook");
00727          break;
00728       case AST_CONTROL_CONGESTION:
00729          strcpy(subclass, "Congestion");
00730          break;
00731       case AST_CONTROL_FLASH:
00732          strcpy(subclass, "Flash");
00733          break;
00734       case AST_CONTROL_WINK:
00735          strcpy(subclass, "Wink");
00736          break;
00737       case AST_CONTROL_OPTION:
00738          strcpy(subclass, "Option");
00739          break;
00740       case AST_CONTROL_RADIO_KEY:
00741          strcpy(subclass, "Key Radio");
00742          break;
00743       case AST_CONTROL_RADIO_UNKEY:
00744          strcpy(subclass, "Unkey Radio");
00745          break;
00746       case -1:
00747          strcpy(subclass, "Stop generators");
00748          break;
00749       default:
00750          snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass);
00751       }
00752       break;
00753    case AST_FRAME_NULL:
00754       strcpy(ftype, "Null Frame");
00755       strcpy(subclass, "N/A");
00756       break;
00757    case AST_FRAME_IAX:
00758       /* Should never happen */
00759       strcpy(ftype, "IAX Specific");
00760       snprintf(subclass, sizeof(subclass), "IAX Frametype %d", f->subclass);
00761       break;
00762    case AST_FRAME_TEXT:
00763       strcpy(ftype, "Text");
00764       strcpy(subclass, "N/A");
00765       ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00766       break;
00767    case AST_FRAME_IMAGE:
00768       strcpy(ftype, "Image");
00769       snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(f->subclass));
00770       break;
00771    case AST_FRAME_HTML:
00772       strcpy(ftype, "HTML");
00773       switch(f->subclass) {
00774       case AST_HTML_URL:
00775          strcpy(subclass, "URL");
00776          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00777          break;
00778       case AST_HTML_DATA:
00779          strcpy(subclass, "Data");
00780          break;
00781       case AST_HTML_BEGIN:
00782          strcpy(subclass, "Begin");
00783          break;
00784       case AST_HTML_END:
00785          strcpy(subclass, "End");
00786          break;
00787       case AST_HTML_LDCOMPLETE:
00788          strcpy(subclass, "Load Complete");
00789          break;
00790       case AST_HTML_NOSUPPORT:
00791          strcpy(subclass, "No Support");
00792          break;
00793       case AST_HTML_LINKURL:
00794          strcpy(subclass, "Link URL");
00795          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00796          break;
00797       case AST_HTML_UNLINK:
00798          strcpy(subclass, "Unlink");
00799          break;
00800       case AST_HTML_LINKREJECT:
00801          strcpy(subclass, "Link Reject");
00802          break;
00803       default:
00804          snprintf(subclass, sizeof(subclass), "Unknown HTML frame '%d'\n", f->subclass);
00805          break;
00806       }
00807       break;
00808    default:
00809       snprintf(ftype, sizeof(ftype), "Unknown Frametype '%d'", f->frametype);
00810    }
00811    if (!ast_strlen_zero(moreinfo))
00812       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) '%s' ] [%s]\n",  
00813          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00814          term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00815          f->frametype, 
00816          term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00817          f->subclass, 
00818          term_color(cmn, moreinfo, COLOR_BRGREEN, COLOR_BLACK, sizeof(cmn)),
00819          term_color(cn, n, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00820    else
00821       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) ] [%s]\n",  
00822          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00823          term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00824          f->frametype, 
00825          term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00826          f->subclass, 
00827          term_color(cn, n, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00828 
00829 }

static 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, 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 1297 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.

Referenced by ast_channel_spy_read_frame().

01298 {
01299    int count;
01300    short *data1, *data2;
01301 
01302    if ((f1->frametype != AST_FRAME_VOICE) || (f1->subclass != AST_FORMAT_SLINEAR))
01303       return -1;
01304 
01305    if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass != AST_FORMAT_SLINEAR))
01306       return -1;
01307 
01308    if (f1->samples != f2->samples)
01309       return -1;
01310 
01311    for (count = 0, data1 = f1->data, data2 = f2->data;
01312         count < f1->samples;
01313         count++, data1++, data2++)
01314       ast_slinear_saturated_add(data1, data2);
01315 
01316    return 0;
01317 }

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 361 of file frame.c.

References AST_MALLOCD_HDR, 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().

00362 {
00363    struct ast_frame *out;
00364    int len, srclen = 0;
00365    void *buf;
00366    /* Start with standard stuff */
00367    len = sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET + f->datalen;
00368    /* If we have a source, add space for it */
00369    /*
00370     * XXX Watch out here - if we receive a src which is not terminated
00371     * properly, we can be easily attacked. Should limit the size we deal with.
00372     */
00373    if (f->src)
00374       srclen = strlen(f->src);
00375    if (srclen > 0)
00376       len += srclen + 1;
00377    buf = malloc(len);
00378    if (!buf)
00379       return NULL;
00380    out = buf;
00381    /* Set us as having malloc'd header only, so it will eventually
00382       get freed. */
00383    out->frametype = f->frametype;
00384    out->subclass = f->subclass;
00385    out->datalen = f->datalen;
00386    out->samples = f->samples;
00387    out->delivery = f->delivery;
00388    out->mallocd = AST_MALLOCD_HDR;
00389    out->offset = AST_FRIENDLY_OFFSET;
00390    out->data = buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
00391    if (srclen > 0) {
00392       out->src = out->data + f->datalen;
00393       /* Must have space since we allocated for it */
00394       strcpy((char *)out->src, f->src);
00395    } else
00396       out->src = NULL;
00397    out->prev = NULL;
00398    out->next = NULL;
00399    memcpy(out->data, f->data, out->datalen); 
00400    return out;
00401 }

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_MALLOCD_DATA, AST_MALLOCD_HDR, AST_MALLOCD_SRC, 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_full(), 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_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(), measurenoise(), 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_DATA, 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    void *newdata;
00308 
00309    if (!(fr->mallocd & AST_MALLOCD_HDR)) {
00310       /* Allocate a new header if needed */
00311       out = ast_frame_header_new();
00312       if (!out) {
00313          ast_log(LOG_WARNING, "Out of memory\n");
00314          return NULL;
00315       }
00316       out->frametype = fr->frametype;
00317       out->subclass = fr->subclass;
00318       out->datalen = fr->datalen;
00319       out->samples = fr->samples;
00320       out->offset = fr->offset;
00321       out->src = NULL;
00322       out->data = fr->data;
00323    } else
00324       out = fr;
00325    
00326    if (!(fr->mallocd & AST_MALLOCD_SRC)) {
00327       if (fr->src) {
00328          out->src = strdup(fr->src);
00329          if (!out->src) {
00330             if (out != fr)
00331                free(out);
00332             ast_log(LOG_WARNING, "Out of memory\n");
00333             return NULL;
00334          }
00335       }
00336    } else
00337       out->src = fr->src;
00338    
00339    if (!(fr->mallocd & AST_MALLOCD_DATA))  {
00340       newdata = malloc(fr->datalen + AST_FRIENDLY_OFFSET);
00341       if (!newdata) {
00342          if (out->src != fr->src)
00343             free((void *) out->src);
00344          if (out != fr)
00345             free(out);
00346          ast_log(LOG_WARNING, "Out of memory\n");
00347          return NULL;
00348       }
00349       newdata += AST_FRIENDLY_OFFSET;
00350       out->offset = AST_FRIENDLY_OFFSET;
00351       out->datalen = fr->datalen;
00352       memcpy(newdata, fr->data, fr->datalen);
00353       out->data = newdata;
00354    }
00355 
00356    out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
00357    
00358    return out;
00359 }

struct ast_format_list* ast_get_format_list size_t *  size  ) 
 

Definition at line 503 of file frame.c.

00504 {
00505    *size = (sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list));
00506    return AST_FORMAT_LIST;
00507 }

struct ast_format_list* ast_get_format_list_index int  index  ) 
 

Definition at line 498 of file frame.c.

00499 {
00500    return &AST_FORMAT_LIST[index];
00501 }

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 568 of file frame.c.

References ast_expand_codec_alias(), and format.

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

00569 {
00570    int x = 0, all = 0, format = 0;
00571 
00572    all = strcasecmp(name, "all") ? 0 : 1;
00573    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00574       if(AST_FORMAT_LIST[x].visible && (all || 
00575                                 !strcasecmp(AST_FORMAT_LIST[x].name,name) ||
00576                                 !strcasecmp(AST_FORMAT_LIST[x].name,ast_expand_codec_alias(name)))) {
00577          format |= AST_FORMAT_LIST[x].bits;
00578          if(!all)
00579             break;
00580       }
00581    }
00582 
00583    return format;
00584 }

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 509 of file frame.c.

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_full(), ast_read(), ast_register_translator(), ast_rtp_write(), ast_slinfactory_feed(), ast_streamfile(), ast_translator_build_path(), ast_unregister_translator(), ast_writestream(), 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().

00510 {
00511    int x = 0;
00512    char *ret = "unknown";
00513    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00514       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == format) {
00515          ret = AST_FORMAT_LIST[x].name;
00516          break;
00517       }
00518    }
00519    return ret;
00520 }

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 522 of file frame.c.

References 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().

00522                                                                      {
00523 
00524    int x = 0;
00525    unsigned len;
00526    char *end = buf;
00527    char *start = buf;
00528    if (!size) return buf;
00529    snprintf(end, size, "0x%x (", format);
00530    len = strlen(end);
00531    end += len;
00532    size -= len;
00533    start = end;
00534    for (x = 0 ; x < sizeof(AST_FORMAT_LIST) / sizeof(struct ast_format_list) ; x++) {
00535       if (AST_FORMAT_LIST[x].visible && (AST_FORMAT_LIST[x].bits & format)) {
00536          snprintf(end, size,"%s|",AST_FORMAT_LIST[x].name);
00537          len = strlen(end);
00538          end += len;
00539          size -= len;
00540       }
00541    }
00542    if (start == end)
00543       snprintf(start, size, "nothing)");
00544    else if (size > 1)
00545       *(end -1) = ')';
00546    return buf;
00547 }

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 1022 of file frame.c.

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

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

01023 {
01024    char *parse;
01025    char *this;
01026    int format;
01027 
01028    parse = ast_strdupa(list);
01029    while ((this = strsep(&parse, ","))) {
01030       if (!(format = ast_getformatbyname(this))) {
01031          ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", allowing ? "allow" : "disallow", this);
01032          continue;
01033       }
01034 
01035       if (mask) {
01036          if (allowing)
01037             *mask |= format;
01038          else
01039             *mask &= ~format;
01040       }
01041 
01042       if (pref) {
01043          if (strcasecmp(this, "all")) {
01044             if (allowing)
01045                ast_codec_pref_append(pref, format);
01046             else
01047                ast_codec_pref_remove(pref, format);
01048          } else if (!allowing) {
01049             memset(pref, 0, sizeof(*pref));
01050          }
01051       }
01052    }
01053 }

void ast_smoother_free struct ast_smoother s  ) 
 

Definition at line 243 of file frame.c.

References free.

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.

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_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), AST_SMOOTHER_FLAG_G729, 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, 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 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.

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 487 of file frame.c.

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

00488 {
00489    int i;
00490    unsigned short *dst_s = dst;
00491    const unsigned short *src_s = src;
00492 
00493    for (i=0; i<samples; i++)
00494       dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
00495 }

static int g723_len unsigned char  buf  )  [static]
 

Definition at line 1055 of file frame.c.

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

Referenced by g723_samples(), g723tolin_framein(), and lintog723_frameout().

01056 {
01057    switch(buf & TYPE_MASK) {
01058    case TYPE_DONTSEND:
01059       return 0;
01060       break;
01061    case TYPE_SILENCE:
01062       return 4;
01063       break;
01064    case TYPE_HIGH:
01065       return 24;
01066       break;
01067    case TYPE_LOW:
01068       return 20;
01069       break;
01070    default:
01071       ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", buf & TYPE_MASK);
01072    }
01073    return -1;
01074 }

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

Definition at line 1076 of file frame.c.

References g723_len().

Referenced by ast_codec_get_samples().

01077 {
01078    int pos = 0;
01079    int samples = 0;
01080    int res;
01081    while(pos < maxlen) {
01082       res = g723_len(buf[pos]);
01083       if (res <= 0)
01084          break;
01085       samples += 240;
01086       pos += res;
01087    }
01088    return samples;
01089 }

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

Definition at line 1091 of file frame.c.

Referenced by speex_get_wb_sz_at(), and speex_samples().

01092 {
01093    int byte = bit / 8;       /* byte containing first bit */
01094    int rem = 8 - (bit % 8);  /* remaining bits in first byte */
01095    unsigned char ret = 0;
01096    
01097    if (n <= 0 || n > 8)
01098       return 0;
01099 
01100    if (rem < n) {
01101       ret = (data[byte] << (n - rem));
01102       ret |= (data[byte + 1] >> (8 - n + rem));
01103    } else {
01104       ret = (data[byte] >> (rem - n));
01105    }
01106 
01107    return (ret & (0xff >> (8 - n)));
01108 }

int init_framer void   ) 
 

Definition at line 868 of file frame.c.

References ast_cli_register_multiple().

Referenced by main().

00869 {
00870    ast_cli_register_multiple(my_clis, sizeof(my_clis)/sizeof(my_clis[0]) );
00871    return 0;   
00872 }

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

Definition at line 646 of file frame.c.

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

00647 {
00648    int codec, i, found=0;
00649 
00650    if (argc != 3)
00651       return RESULT_SHOWUSAGE;
00652 
00653    if (sscanf(argv[2],"%d",&codec) != 1)
00654       return RESULT_SHOWUSAGE;
00655 
00656    for (i=0;i<32;i++)
00657       if (codec & (1 << i)) {
00658          found = 1;
00659          ast_cli(fd, "%11u (1 << %2d)  %s\n",1 << i,i,ast_codec2str(1<<i));
00660       }
00661 
00662    if (! found)
00663       ast_cli(fd, "Codec %d not found\n", codec);
00664 
00665    return RESULT_SUCCESS;
00666 }

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

Definition at line 598 of file frame.c.

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

00599 {
00600    int i, found=0;
00601    char hex[25];
00602    
00603    if ((argc < 2) || (argc > 3))
00604       return RESULT_SHOWUSAGE;
00605 
00606    if (!option_dontwarn)
00607       ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n"
00608             "\tIt does not indicate anything about your configuration.\n");
00609 
00610    ast_cli(fd, "%11s %9s %10s   TYPE   %5s   %s\n","INT","BINARY","HEX","NAME","DESC");
00611    ast_cli(fd, "--------------------------------------------------------------------------------\n");
00612    if ((argc == 2) || (!strcasecmp(argv[1],"audio"))) {
00613       found = 1;
00614       for (i=0;i<11;i++) {
00615          snprintf(hex,25,"(0x%x)",1<<i);
00616          ast_cli(fd, "%11u (1 << %2d) %10s  audio   %5s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00617       }
00618    }
00619 
00620    if ((argc == 2) || (!strcasecmp(argv[1],"image"))) {
00621       found = 1;
00622       for (i=16;i<18;i++) {
00623          snprintf(hex,25,"(0x%x)",1<<i);
00624          ast_cli(fd, "%11u (1 << %2d) %10s  image   %5s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00625       }
00626    }
00627 
00628    if ((argc == 2) || (!strcasecmp(argv[1],"video"))) {
00629       found = 1;
00630       for (i=18;i<21;i++) {
00631          snprintf(hex,25,"(0x%x)",1<<i);
00632          ast_cli(fd, "%11u (1 << %2d) %10s  video   %5s   (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i));
00633       }
00634    }
00635 
00636    if (! found)
00637       return RESULT_SHOWUSAGE;
00638    else
00639       return RESULT_SUCCESS;
00640 }

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

Definition at line 1110 of file frame.c.

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

Referenced by speex_samples().

01111 {
01112    static int SpeexWBSubModeSz[] = {
01113       0, 36, 112, 192,
01114       352, 0, 0, 0 };
01115    int off = bit;
01116    unsigned char c;
01117 
01118    /* skip up to two wideband frames */
01119    if (((len * 8 - off) >= 5) && 
01120       get_n_bits_at(data, 1, off)) {
01121       c = get_n_bits_at(data, 3, off + 1);
01122       off += SpeexWBSubModeSz[c];
01123 
01124       if (((len * 8 - off) >= 5) && 
01125          get_n_bits_at(data, 1, off)) {
01126          c = get_n_bits_at(data, 3, off + 1);
01127          off += SpeexWBSubModeSz[c];
01128 
01129          if (((len * 8 - off) >= 5) && 
01130             get_n_bits_at(data, 1, off)) {
01131             ast_log(LOG_WARNING, "Encountered corrupt speex frame; too many wideband frames in a row.\n");
01132             return -1;
01133          }
01134       }
01135 
01136    }
01137    return off - bit;
01138 }

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

Definition at line 1140 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().

01141 {
01142    static int SpeexSubModeSz[] = {
01143                5, 43, 119, 160,
01144       220, 300, 364, 492, 
01145       79, 0, 0, 0,
01146       0, 0, 0, 0 };
01147    static int SpeexInBandSz[] = { 
01148       1, 1, 4, 4,
01149       4, 4, 4, 4,
01150       8, 8, 16, 16,
01151       32, 32, 64, 64 };
01152    int bit = 0;
01153    int cnt = 0;
01154    int off = 0;
01155    unsigned char c;
01156 
01157    while ((len * 8 - bit) >= 5) {
01158       /* skip wideband frames */
01159       off = speex_get_wb_sz_at(data, len, bit);
01160       if (off < 0)  {
01161          ast_log(LOG_WARNING, "Had error while reading wideband frames for speex samples\n");
01162          break;
01163       }
01164       bit += off;
01165 
01166       if ((len * 8 - bit) < 5) {
01167          ast_log(LOG_WARNING, "Not enough bits remaining after wide band for speex samples.\n");
01168          break;
01169       }
01170 
01171       /* get control bits */
01172       c = get_n_bits_at(data, 5, bit);
01173       bit += 5;
01174 
01175       if (c == 15) { 
01176          /* terminator */
01177          break; 
01178       } else if (c == 14) {
01179          /* in-band signal; next 4 bits contain signal id */
01180          c = get_n_bits_at(data, 4, bit);
01181          bit += 4;
01182          bit += SpeexInBandSz[c];
01183       } else if (c == 13) {
01184          /* user in-band; next 5 bits contain msg len */
01185          c = get_n_bits_at(data, 5, bit);
01186          bit += 5;
01187          bit += c * 8;
01188       } else if (c > 8) {
01189          /* unknown */
01190          break;
01191       } else {
01192          /* skip number bits for submode (less the 5 control bits) */
01193          bit += SpeexSubModeSz[c] - 5;
01194          cnt += 160; /* new frame */
01195       }
01196    }
01197    return cnt;
01198 }


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.

char frame_show_codec_n_usage[] [static]
 

Initial value:

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

Definition at line 668 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 642 of file frame.c.

struct ast_cli_entry my_clis[] [static]
 

Definition at line 857 of file frame.c.


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