498 lines
13 KiB
C
Executable File
498 lines
13 KiB
C
Executable File
/*
|
|
* Headerless G.726 (16/24/32/40kbps) data format for Asterisk.
|
|
*
|
|
* Copyright (c) 2004 - 2005, inAccess Networks
|
|
*
|
|
* Michael Manousos <manousos@inaccessnetworks.com>
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <stdlib.h>
|
|
#include <sys/time.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include "asterisk/lock.h"
|
|
#include "asterisk/options.h"
|
|
#include "asterisk/channel.h"
|
|
#include "asterisk/file.h"
|
|
#include "asterisk/logger.h"
|
|
#include "asterisk/sched.h"
|
|
#include "asterisk/module.h"
|
|
#include "asterisk/endian.h"
|
|
|
|
#define RATE_40 0
|
|
#define RATE_32 1
|
|
#define RATE_24 2
|
|
#define RATE_16 3
|
|
|
|
/* We can only read/write chunks of FRAME_TIME ms G.726 data */
|
|
#define FRAME_TIME 10 /* 10 ms size */
|
|
|
|
/* Frame sizes in bytes */
|
|
static int frame_size[4] = {
|
|
FRAME_TIME * 5,
|
|
FRAME_TIME * 4,
|
|
FRAME_TIME * 3,
|
|
FRAME_TIME * 2
|
|
};
|
|
|
|
struct ast_filestream {
|
|
/* Do not place anything before "reserved" */
|
|
void *reserved[AST_RESERVED_POINTERS];
|
|
/* This is what a filestream means to us */
|
|
int fd; /* Open file descriptor */
|
|
int rate; /* RATE_* defines */
|
|
struct ast_frame fr; /* Frame information */
|
|
char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */
|
|
char empty; /* Empty character */
|
|
unsigned char g726[FRAME_TIME * 5]; /* G.726 encoded voice */
|
|
};
|
|
|
|
AST_MUTEX_DEFINE_STATIC(g726_lock);
|
|
static int glistcnt = 0;
|
|
|
|
static char *desc = "Raw G.726 (16/24/32/40kbps) data";
|
|
static char *name40 = "g726-40";
|
|
static char *name32 = "g726-32";
|
|
static char *name24 = "g726-24";
|
|
static char *name16 = "g726-16";
|
|
static char *exts40 = "g726-40";
|
|
static char *exts32 = "g726-32";
|
|
static char *exts24 = "g726-24";
|
|
static char *exts16 = "g726-16";
|
|
|
|
/*
|
|
* Rate dependant format functions (open, rewrite)
|
|
*/
|
|
static struct ast_filestream *g726_40_open(int fd)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_40;
|
|
tmp->fr.data = tmp->g726;
|
|
tmp->fr.frametype = AST_FRAME_VOICE;
|
|
tmp->fr.subclass = AST_FORMAT_G726;
|
|
/* datalen will vary for each frame */
|
|
tmp->fr.src = name40;
|
|
tmp->fr.mallocd = 0;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_32_open(int fd)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_32;
|
|
tmp->fr.data = tmp->g726;
|
|
tmp->fr.frametype = AST_FRAME_VOICE;
|
|
tmp->fr.subclass = AST_FORMAT_G726;
|
|
/* datalen will vary for each frame */
|
|
tmp->fr.src = name32;
|
|
tmp->fr.mallocd = 0;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_24_open(int fd)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_24;
|
|
tmp->fr.data = tmp->g726;
|
|
tmp->fr.frametype = AST_FRAME_VOICE;
|
|
tmp->fr.subclass = AST_FORMAT_G726;
|
|
/* datalen will vary for each frame */
|
|
tmp->fr.src = name24;
|
|
tmp->fr.mallocd = 0;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_16_open(int fd)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_16;
|
|
tmp->fr.data = tmp->g726;
|
|
tmp->fr.frametype = AST_FRAME_VOICE;
|
|
tmp->fr.subclass = AST_FORMAT_G726;
|
|
/* datalen will vary for each frame */
|
|
tmp->fr.src = name16;
|
|
tmp->fr.mallocd = 0;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_40_rewrite(int fd, const char *comment)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_40;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
} else
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_32_rewrite(int fd, const char *comment)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_32;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
} else
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_24_rewrite(int fd, const char *comment)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_24;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
} else
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *g726_16_rewrite(int fd, const char *comment)
|
|
{
|
|
/* We don't have any header to read or anything really, but
|
|
if we did, it would go here. We also might want to check
|
|
and be sure it's a valid file. */
|
|
struct ast_filestream *tmp;
|
|
if ((tmp = malloc(sizeof(struct ast_filestream)))) {
|
|
memset(tmp, 0, sizeof(struct ast_filestream));
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->rate = RATE_16;
|
|
glistcnt++;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Created filestream G.726-%dk.\n",
|
|
40 - tmp->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
} else
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
return tmp;
|
|
}
|
|
|
|
/*
|
|
* Rate independent format functions (close, read, write)
|
|
*/
|
|
static void g726_close(struct ast_filestream *s)
|
|
{
|
|
if (ast_mutex_lock(&g726_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock g726 list.\n");
|
|
return;
|
|
}
|
|
glistcnt--;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Closed filestream G.726-%dk.\n", 40 - s->rate * 8);
|
|
ast_mutex_unlock(&g726_lock);
|
|
ast_update_use_count();
|
|
close(s->fd);
|
|
free(s);
|
|
s = NULL;
|
|
}
|
|
|
|
static struct ast_frame *g726_read(struct ast_filestream *s, int *whennext)
|
|
{
|
|
int res;
|
|
/* Send a frame from the file to the appropriate channel */
|
|
s->fr.frametype = AST_FRAME_VOICE;
|
|
s->fr.subclass = AST_FORMAT_G726;
|
|
s->fr.offset = AST_FRIENDLY_OFFSET;
|
|
s->fr.samples = 8 * FRAME_TIME;
|
|
s->fr.datalen = frame_size[s->rate];
|
|
s->fr.mallocd = 0;
|
|
s->fr.data = s->g726;
|
|
if ((res = read(s->fd, s->g726, s->fr.datalen)) != s->fr.datalen) {
|
|
if (res)
|
|
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
|
|
return NULL;
|
|
}
|
|
*whennext = s->fr.samples;
|
|
return &s->fr;
|
|
}
|
|
|
|
static int g726_write(struct ast_filestream *fs, struct ast_frame *f)
|
|
{
|
|
int res;
|
|
if (f->frametype != AST_FRAME_VOICE) {
|
|
ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
|
|
return -1;
|
|
}
|
|
if (f->subclass != AST_FORMAT_G726) {
|
|
ast_log(LOG_WARNING, "Asked to write non-G726 frame (%d)!\n",
|
|
f->subclass);
|
|
return -1;
|
|
}
|
|
if (f->datalen % frame_size[fs->rate]) {
|
|
ast_log(LOG_WARNING, "Invalid data length %d, should be multiple of %d\n",
|
|
f->datalen, frame_size[fs->rate]);
|
|
return -1;
|
|
}
|
|
if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
|
|
ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n",
|
|
res, frame_size[fs->rate], strerror(errno));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static char *g726_getcomment(struct ast_filestream *s)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static int g726_seek(struct ast_filestream *fs, long sample_offset, int whence)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static int g726_trunc(struct ast_filestream *fs)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static long g726_tell(struct ast_filestream *fs)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Module interface (load_module, unload_module, usecount, description, key)
|
|
*/
|
|
int load_module()
|
|
{
|
|
int res;
|
|
|
|
res = ast_format_register(name40, exts40, AST_FORMAT_G726,
|
|
g726_40_open,
|
|
g726_40_rewrite,
|
|
g726_write,
|
|
g726_seek,
|
|
g726_trunc,
|
|
g726_tell,
|
|
g726_read,
|
|
g726_close,
|
|
g726_getcomment);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to register format %s.\n", name40);
|
|
return(-1);
|
|
}
|
|
res = ast_format_register(name32, exts32, AST_FORMAT_G726,
|
|
g726_32_open,
|
|
g726_32_rewrite,
|
|
g726_write,
|
|
g726_seek,
|
|
g726_trunc,
|
|
g726_tell,
|
|
g726_read,
|
|
g726_close,
|
|
g726_getcomment);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to register format %s.\n", name32);
|
|
return(-1);
|
|
}
|
|
res = ast_format_register(name24, exts24, AST_FORMAT_G726,
|
|
g726_24_open,
|
|
g726_24_rewrite,
|
|
g726_write,
|
|
g726_seek,
|
|
g726_trunc,
|
|
g726_tell,
|
|
g726_read,
|
|
g726_close,
|
|
g726_getcomment);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to register format %s.\n", name24);
|
|
return(-1);
|
|
}
|
|
res = ast_format_register(name16, exts16, AST_FORMAT_G726,
|
|
g726_16_open,
|
|
g726_16_rewrite,
|
|
g726_write,
|
|
g726_seek,
|
|
g726_trunc,
|
|
g726_tell,
|
|
g726_read,
|
|
g726_close,
|
|
g726_getcomment);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to register format %s.\n", name16);
|
|
return(-1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
int unload_module()
|
|
{
|
|
int res;
|
|
|
|
res = ast_format_unregister(name16);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to unregister format %s.\n", name16);
|
|
return(-1);
|
|
}
|
|
res = ast_format_unregister(name24);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to unregister format %s.\n", name24);
|
|
return(-1);
|
|
}
|
|
res = ast_format_unregister(name32);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to unregister format %s.\n", name32);
|
|
return(-1);
|
|
}
|
|
res = ast_format_unregister(name40);
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Failed to unregister format %s.\n", name40);
|
|
return(-1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
int usecount()
|
|
{
|
|
return glistcnt;
|
|
}
|
|
|
|
char *description()
|
|
{
|
|
return desc;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|
|
|