Asterisk
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asterisk
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@87 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1.0
Mark Spencer 26 years ago
parent 2ebc206555
commit b1b4b545f2
3 changed files with 439 additions and 0 deletions
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9
BUGS
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* EVERYTHING MARKED WITH "XXX" IN THE SOURCE REPRESENTS A BUG! Sometimes
these bugs are in asterisk, and sometimes they relate to the products
that asterisk uses.
* The MP3 decoder is completely broken
* The translator API may introduce warble in the case of going in both
directions, but I haven't verified that. The trouble should only enter
in the case of mismatched frame lengths.

72
codecs/Makefile
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#
# Asterisk -- A telephony toolkit for Linux.
#
# Makefile for PBX frontends (dynamically loaded)
#
# Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
#
# Mark Spencer <markster@linux-support.net>
#
# This program is free software, distributed under the terms of
# the GNU General Public License
#
#
# Uncomment if you have g723.1 code (with the same API as the Annex-A code
# and have placed it in the g723.1 directory and/or the Annex-B code in
# g723.1b)
#
#MODG723=codec_g723_1.so codec_g723_1b.so
MODG723=$(shell [ -f g723.1/coder.c ] && echo "codec_g723_1.so")
MODG723+=$(shell [ -f g723.1b/coder2.c ] && echo "codec_g723_1b.so")
CFLAGS+=
LIBG723=g723.1/libg723.a
LIBG723B=g723.1b/libg723b.a
LIBGSM=gsm/lib/libgsm.a
LIBMP3=mp3/libmp3.a
CODECS+=$(MODG723) codec_gsm.so #codec_mp3_d.so
all: $(CODECS)
clean:
rm -f *.so *.o
make -C g723.1 clean
make -C g723.1b clean
make -C gsm clean
make -C mp3 clean
$(LIBG723):
make -C g723.1 all
$(LIBGSM):
make -C gsm lib/libgsm.a
$(LIBG723B):
make -C g723.1b all
$(LIBMP3):
make -C mp3 all
codec_g723_1.so : codec_g723_1.o $(LIBG723)
$(CC) -shared -Xlinker -x -o $@ $< $(LIBG723)
codec_g723_1b.o : codec_g723_1.c
$(CC) -c -o $@ $(CFLAGS) -DANNEX_B $<
codec_g723_1b.so : codec_g723_1b.o $(LIBG723B)
$(CC) -shared -Xlinker -x -o $@ $< $(LIBG723B) -lm
codec_gsm.so: codec_gsm.o $(LIBGSM)
$(CC) -shared -Xlinker -x -o $@ $< $(LIBGSM)
codec_mp3_d.so: codec_mp3_d.o $(LIBMP3)
$(CC) -shared -Xlinker -x -o $@ $< $(LIBMP3)
%.so : %.o
$(CC) -shared -Xlinker -x -o $@ $<
install: all
for x in $(CODECS); do $(INSTALL) -m 755 $$x $(MODULES_DIR) ; done

358
codecs/codec_g723_1.c
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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Translate between signed linear and G.723.1
*
* The G.723.1 code is not included in the Asterisk distribution because
* it is covered with patents, and in spite of statements to the contrary,
* the "technology" is extremely expensive to license.
*
* Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#define TYPE_SILENCE 0x2
#define TYPE_HIGH 0x0
#define TYPE_LOW 0x1
#define TYPE_MASK 0x3
#include <asterisk/translate.h>
#include <asterisk/module.h>
#include <asterisk/logger.h>
#include <pthread.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <netinet/in.h>
#include <string.h>
#include <stdio.h>
#ifdef ANNEX_B
#include "g723.1b/typedef2.h"
#include "g723.1b/cst2.h"
#include "g723.1b/coder2.h"
#include "g723.1b/decod2.h"
#include "g723.1b/deccng2.h"
#include "g723.1b/codcng2.h"
#include "g723.1b/vad2.h"
#else
#include "g723.1/typedef.h"
#include "g723.1/cst_lbc.h"
#include "g723.1/coder.h"
#include "g723.1/decod.h"
#include "g723.1/dec_cng.h"
#include "g723.1/cod_cng.h"
#include "g723.1/vad.h"
#endif
/* Sample frame data */
#include "slin_g723_ex.h"
#include "g723_slin_ex.h"
static pthread_mutex_t localuser_lock = PTHREAD_MUTEX_INITIALIZER;
static int localusecnt=0;
#ifdef ANNEX_B
static char *tdesc = "Annex B (floating point) G.723.1/PCM16 Codec Translator";
#else
static char *tdesc = "Annex A (fixed point) G.723.1/PCM16 Codec Translator";
#endif
/* Globals */
Flag UsePf = True;
Flag UseHp = True;
Flag UseVx = True;
enum Crate WrkRate = Rate63;
struct g723_encoder_pvt {
struct cod_state cod;
struct ast_frame f;
/* Space to build offset */
char offset[AST_FRIENDLY_OFFSET];
/* Buffer for our outgoing frame */
char outbuf[24];
/* Enough to store a full second */
short buf[8000];
int tail;
};
struct g723_decoder_pvt {
struct dec_state dec;
struct ast_frame f;
/* Space to build offset */
char offset[AST_FRIENDLY_OFFSET];
/* Enough to store a full second */
short buf[8000];
int tail;
};
static struct ast_translator_pvt *g723tolin_new()
{
struct g723_decoder_pvt *tmp;
tmp = malloc(sizeof(struct g723_decoder_pvt));
if (tmp) {
Init_Decod(&tmp->dec);
Init_Dec_Cng(&tmp->dec);
tmp->tail = 0;
}
return (struct ast_translator_pvt *)tmp;
}
static struct ast_frame *lintog723_sample()
{
static struct ast_frame f;
f.frametype = AST_FRAME_VOICE;
f.subclass = AST_FORMAT_SLINEAR;
f.datalen = sizeof(slin_g723_ex);
/* Assume 8000 Hz */
f.timelen = sizeof(slin_g723_ex)/16;
f.mallocd = 0;
f.offset = 0;
f.src = __PRETTY_FUNCTION__;
f.data = slin_g723_ex;
return &f;
}
static struct ast_frame *g723tolin_sample()
{
static struct ast_frame f;
f.frametype = AST_FRAME_VOICE;
f.subclass = AST_FORMAT_G723_1;
f.datalen = sizeof(g723_slin_ex);
/* All frames are 30 ms long */
f.timelen = 30;
f.mallocd = 0;
f.offset = 0;
f.src = __PRETTY_FUNCTION__;
f.data = g723_slin_ex;
return &f;
}
static struct ast_translator_pvt *lintog723_new()
{
struct g723_encoder_pvt *tmp;
tmp = malloc(sizeof(struct g723_encoder_pvt));
if (tmp) {
Init_Coder(&tmp->cod);
/* Init Comfort Noise Functions */
if( UseVx ) {
Init_Vad(&tmp->cod);
Init_Cod_Cng(&tmp->cod);
}
tmp->tail = 0;
}
return (struct ast_translator_pvt *)tmp;
}
static struct ast_frame *g723tolin_frameout(struct ast_translator_pvt *pvt)
{
struct g723_decoder_pvt *tmp = (struct g723_decoder_pvt *)pvt;
if (!tmp->tail)
return NULL;
/* Signed linear is no particular frame size, so just send whatever
we have in the buffer in one lump sum */
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_SLINEAR;
tmp->f.datalen = tmp->tail * 2;
/* Assume 8000 Hz */
tmp->f.timelen = tmp->tail / 8;
tmp->f.mallocd = 0;
tmp->f.offset = AST_FRIENDLY_OFFSET;
tmp->f.src = __PRETTY_FUNCTION__;
tmp->f.data = tmp->buf;
/* Reset tail pointer */
tmp->tail = 0;
#if 0
/* Save a sample frame */
{ static int samplefr = 0;
if (samplefr == 80) {
int fd;
fd = open("g723.example", O_WRONLY | O_CREAT | O_TRUNC, 0644);
write(fd, tmp->f.data, tmp->f.datalen);
close(fd);
}
samplefr++;
}
#endif
return &tmp->f;
}
static int g723tolin_framein(struct ast_translator_pvt *pvt, struct ast_frame *f)
{
struct g723_decoder_pvt *tmp = (struct g723_decoder_pvt *)pvt;
#ifdef ANNEX_B
FLOAT tmpdata[Frame];
int x;
#endif
/* Assuming there's space left, decode into the current buffer at
the tail location */
if (tmp->tail + Frame < sizeof(tmp->buf)/2) {
#ifdef ANNEX_B
Decod(&tmp->dec, tmpdata, f->data, 0);
for (x=0;x<Frame;x++)
(tmp->buf + tmp->tail)[x] = tmpdata[x];
#else
Decod(&tmp->dec, tmp->buf + tmp->tail, f->data, 0);
#endif
tmp->tail+=Frame;
} else {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
return 0;
}
static int lintog723_framein(struct ast_translator_pvt *pvt, struct ast_frame *f)
{
/* Just add the frames to our stream */
/* XXX We should look at how old the rest of our stream is, and if it
is too old, then we should overwrite it entirely, otherwise we can
get artifacts of earlier talk that do not belong */
struct g723_encoder_pvt *tmp = (struct g723_encoder_pvt *)pvt;
if (tmp->tail + f->datalen/2 < sizeof(tmp->buf) / 2) {
memcpy(&tmp->buf[tmp->tail], f->data, f->datalen);
tmp->tail += f->datalen/2;
} else {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
return 0;
}
static struct ast_frame *lintog723_frameout(struct ast_translator_pvt *pvt)
{
struct g723_encoder_pvt *tmp = (struct g723_encoder_pvt *)pvt;
#ifdef ANNEX_B
int x;
FLOAT tmpdata[Frame];
#endif
/* We can't work on anything less than a frame in size */
if (tmp->tail < Frame)
return NULL;
/* Encode a frame of data */
#ifdef ANNEX_B
for (x=0;x<Frame;x++)
tmpdata[x] = tmp->buf[x];
Coder(&tmp->cod, tmpdata, tmp->outbuf);
#else
Coder(&tmp->cod, tmp->buf, tmp->outbuf);
#endif
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_G723_1;
/* Assume 8000 Hz */
tmp->f.timelen = 30;
tmp->f.mallocd = 0;
tmp->f.offset = AST_FRIENDLY_OFFSET;
tmp->f.src = __PRETTY_FUNCTION__;
tmp->f.data = tmp->outbuf;
switch(tmp->outbuf[0] & TYPE_MASK) {
case TYPE_MASK:
case TYPE_SILENCE:
tmp->f.datalen = 4;
break;
case TYPE_HIGH:
tmp->f.datalen = 24;
break;
case TYPE_LOW:
tmp->f.datalen = 20;
break;
default:
ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", tmp->outbuf[0] & TYPE_MASK);
}
tmp->tail -= Frame;
/* Move the data at the end of the buffer to the front */
if (tmp->tail)
memmove(tmp->buf, tmp->buf + Frame, tmp->tail * 2);
#if 0
/* Save to a g723 sample output file... */
{
static int fd = -1;
int delay = htonl(30);
short size;
if (fd < 0)
fd = open("trans.g723", O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0)
ast_log(LOG_WARNING, "Unable to create demo\n");
write(fd, &delay, 4);
size = htons(tmp->f.datalen);
write(fd, &size, 2);
write(fd, tmp->f.data, tmp->f.datalen);
}
#endif
return &tmp->f;
}
static void g723_destroy(struct ast_translator_pvt *pvt)
{
free(pvt);
}
static struct ast_translator g723tolin =
#ifdef ANNEX_B
{ "g723tolinb",
#else
{ "g723tolin",
#endif
AST_FORMAT_G723_1, AST_FORMAT_SLINEAR,
g723tolin_new,
g723tolin_framein,
g723tolin_frameout,
g723_destroy,
g723tolin_sample
};
static struct ast_translator lintog723 =
#ifdef ANNEX_B
{ "lintog723b",
#else
{ "lintog723",
#endif
AST_FORMAT_SLINEAR, AST_FORMAT_G723_1,
lintog723_new,
lintog723_framein,
lintog723_frameout,
g723_destroy,
lintog723_sample
};
int unload_module(void)
{
int res;
pthread_mutex_lock(&localuser_lock);
res = ast_unregister_translator(&lintog723);
if (!res)
res = ast_unregister_translator(&g723tolin);
if (localusecnt)
res = -1;
pthread_mutex_unlock(&localuser_lock);
return res;
}
int load_module(void)
{
int res;
res=ast_register_translator(&g723tolin);
if (!res)
res=ast_register_translator(&lintog723);
else
ast_unregister_translator(&g723tolin);
return res;
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
int res;
STANDARD_USECOUNT(res);
return res;
}
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