mirror of https://github.com/asterisk/asterisk
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@608 65c4cc65-6c06-0410-ace0-fbb531ad65f31.0
Mark Spencer
23 years ago
parent
1bd973bfce
commit
8ce222478d
@ -0,0 +1,351 @@
|
||||
/*
|
||||
* Asterisk -- A telephony toolkit for Linux.
|
||||
*
|
||||
* Save to raw, headerless G729 data.
|
||||
*
|
||||
* Copyright (C) 1999, Mark Spencer
|
||||
*
|
||||
* Mark Spencer <markster@linux-support.net>
|
||||
*
|
||||
* This program is free software, distributed under the terms of
|
||||
* the GNU General Public License
|
||||
*/
|
||||
|
||||
#include <asterisk/lock.h>
|
||||
#include <asterisk/channel.h>
|
||||
#include <asterisk/file.h>
|
||||
#include <asterisk/logger.h>
|
||||
#include <asterisk/sched.h>
|
||||
#include <asterisk/module.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/time.h>
|
||||
#include <stdio.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
#include <pthread.h>
|
||||
#include <endian.h>
|
||||
|
||||
/* Some Ideas for this code came from makeg729e.c by Jeffery Chilton */
|
||||
|
||||
/* Portions of the conversion code are by guido@sienanet.it */
|
||||
|
||||
struct ast_filestream {
|
||||
void *reserved[AST_RESERVED_POINTERS];
|
||||
/* Believe it or not, we must decode/recode to account for the
|
||||
weird MS format */
|
||||
/* This is what a filestream means to us */
|
||||
int fd; /* Descriptor */
|
||||
struct ast_channel *owner;
|
||||
struct ast_frame fr; /* Frame information */
|
||||
char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */
|
||||
char empty; /* Empty character */
|
||||
unsigned char g729[20]; /* Two Real G729 Frames */
|
||||
int lasttimeout;
|
||||
struct timeval last;
|
||||
int adj;
|
||||
struct ast_filestream *next;
|
||||
};
|
||||
|
||||
|
||||
static struct ast_filestream *glist = NULL;
|
||||
static pthread_mutex_t g729_lock = AST_MUTEX_INITIALIZER;
|
||||
static int glistcnt = 0;
|
||||
|
||||
static char *name = "g729";
|
||||
static char *desc = "Raw G729 data";
|
||||
static char *exts = "g729";
|
||||
|
||||
static struct ast_filestream *g729_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_pthread_mutex_lock(&g729_lock)) {
|
||||
ast_log(LOG_WARNING, "Unable to lock g729 list\n");
|
||||
free(tmp);
|
||||
return NULL;
|
||||
}
|
||||
tmp->next = glist;
|
||||
glist = tmp;
|
||||
tmp->fd = fd;
|
||||
tmp->owner = NULL;
|
||||
tmp->fr.data = tmp->g729;
|
||||
tmp->fr.frametype = AST_FRAME_VOICE;
|
||||
tmp->fr.subclass = AST_FORMAT_G729A;
|
||||
/* datalen will vary for each frame */
|
||||
tmp->fr.src = name;
|
||||
tmp->fr.mallocd = 0;
|
||||
tmp->lasttimeout = -1;
|
||||
glistcnt++;
|
||||
ast_pthread_mutex_unlock(&g729_lock);
|
||||
ast_update_use_count();
|
||||
}
|
||||
return tmp;
|
||||
}
|
||||
|
||||
static struct ast_filestream *g729_rewrite(int fd, 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_pthread_mutex_lock(&g729_lock)) {
|
||||
ast_log(LOG_WARNING, "Unable to lock g729 list\n");
|
||||
free(tmp);
|
||||
return NULL;
|
||||
}
|
||||
tmp->next = glist;
|
||||
glist = tmp;
|
||||
tmp->fd = fd;
|
||||
tmp->owner = NULL;
|
||||
tmp->lasttimeout = -1;
|
||||
glistcnt++;
|
||||
ast_pthread_mutex_unlock(&g729_lock);
|
||||
ast_update_use_count();
|
||||
} else
|
||||
ast_log(LOG_WARNING, "Out of memory\n");
|
||||
return tmp;
|
||||
}
|
||||
|
||||
static struct ast_frame *g729_read(struct ast_filestream *s)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void g729_close(struct ast_filestream *s)
|
||||
{
|
||||
struct ast_filestream *tmp, *tmpl = NULL;
|
||||
if (ast_pthread_mutex_lock(&g729_lock)) {
|
||||
ast_log(LOG_WARNING, "Unable to lock g729 list\n");
|
||||
return;
|
||||
}
|
||||
tmp = glist;
|
||||
while(tmp) {
|
||||
if (tmp == s) {
|
||||
if (tmpl)
|
||||
tmpl->next = tmp->next;
|
||||
else
|
||||
glist = tmp->next;
|
||||
break;
|
||||
}
|
||||
tmpl = tmp;
|
||||
tmp = tmp->next;
|
||||
}
|
||||
glistcnt--;
|
||||
if (s->owner) {
|
||||
s->owner->stream = NULL;
|
||||
if (s->owner->streamid > -1)
|
||||
ast_sched_del(s->owner->sched, s->owner->streamid);
|
||||
s->owner->streamid = -1;
|
||||
}
|
||||
ast_pthread_mutex_unlock(&g729_lock);
|
||||
ast_update_use_count();
|
||||
if (!tmp)
|
||||
ast_log(LOG_WARNING, "Freeing a filestream we don't seem to own\n");
|
||||
close(s->fd);
|
||||
free(s);
|
||||
s = NULL;
|
||||
}
|
||||
|
||||
static int ast_read_callback(void *data)
|
||||
{
|
||||
int retval = 0;
|
||||
int res;
|
||||
int delay = 20;
|
||||
struct ast_filestream *s = data;
|
||||
struct timeval tv;
|
||||
/* Send a frame from the file to the appropriate channel */
|
||||
|
||||
s->fr.frametype = AST_FRAME_VOICE;
|
||||
s->fr.subclass = AST_FORMAT_G729A;
|
||||
s->fr.offset = AST_FRIENDLY_OFFSET;
|
||||
s->fr.samples = 160;
|
||||
s->fr.datalen = 20;
|
||||
s->fr.mallocd = 0;
|
||||
s->fr.data = s->g729;
|
||||
if ((res = read(s->fd, s->g729, 20)) != 20) {
|
||||
if (res)
|
||||
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
|
||||
s->owner->streamid = -1;
|
||||
return 0;
|
||||
}
|
||||
/* Lastly, process the frame */
|
||||
if (ast_write(s->owner, &s->fr)) {
|
||||
ast_log(LOG_WARNING, "Failed to write frame\n");
|
||||
s->owner->streamid = -1;
|
||||
return 0;
|
||||
}
|
||||
if (s->last.tv_usec || s->last.tv_usec) {
|
||||
int ms;
|
||||
gettimeofday(&tv, NULL);
|
||||
ms = 1000 * (tv.tv_sec - s->last.tv_sec) +
|
||||
(tv.tv_usec - s->last.tv_usec) / 1000;
|
||||
s->last.tv_sec = tv.tv_sec;
|
||||
s->last.tv_usec = tv.tv_usec;
|
||||
if ((ms - delay) * (ms - delay) > 4) {
|
||||
/* Compensate if we're more than 2 ms off */
|
||||
s->adj -= (ms - delay);
|
||||
}
|
||||
#if 0
|
||||
fprintf(stdout, "Delay is %d, adjustment is %d, last was %d\n", delay, s->adj, ms);
|
||||
#endif
|
||||
delay += s->adj;
|
||||
if (delay < 1)
|
||||
delay = 1;
|
||||
} else
|
||||
gettimeofday(&s->last, NULL);
|
||||
if (s->lasttimeout != delay) {
|
||||
/* We'll install the next timeout now. */
|
||||
s->owner->streamid = ast_sched_add(s->owner->sched,
|
||||
delay, ast_read_callback, s);
|
||||
s->lasttimeout = delay;
|
||||
} else {
|
||||
/* Just come back again at the same time */
|
||||
retval = -1;
|
||||
}
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int g729_apply(struct ast_channel *c, struct ast_filestream *s)
|
||||
{
|
||||
/* Select our owner for this stream, and get the ball rolling. */
|
||||
s->owner = c;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int g729_play(struct ast_filestream *s)
|
||||
{
|
||||
ast_read_callback(s);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int g729_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_G729A) {
|
||||
ast_log(LOG_WARNING, "Asked to write non-G729 frame (%d)!\n", f->subclass);
|
||||
return -1;
|
||||
}
|
||||
if (f->datalen % 20) {
|
||||
ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 20\n", f->datalen);
|
||||
return -1;
|
||||
}
|
||||
if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
|
||||
ast_log(LOG_WARNING, "Bad write (%d/20): %s\n", res, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static char *g729_getcomment(struct ast_filestream *s)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int g729_seek(struct ast_filestream *fs, long sample_offset, int whence)
|
||||
{
|
||||
long bytes;
|
||||
off_t min,cur,max,offset;
|
||||
min = 0;
|
||||
cur = lseek(fs->fd, 0, SEEK_CUR);
|
||||
max = lseek(fs->fd, 0, SEEK_END);
|
||||
|
||||
bytes = 20 * (sample_offset / 160);
|
||||
if(whence == SEEK_SET)
|
||||
offset = bytes;
|
||||
if(whence == SEEK_CUR)
|
||||
offset = cur + bytes;
|
||||
if(whence == SEEK_END)
|
||||
offset = max - bytes;
|
||||
offset = (offset > max)?max:offset;
|
||||
offset = (offset < min)?min:offset;
|
||||
if (lseek(fs->fd, offset, SEEK_SET) < 0)
|
||||
return -1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int g729_trunc(struct ast_filestream *fs)
|
||||
{
|
||||
/* Truncate file to current length */
|
||||
if (ftruncate(fs->fd, lseek(fs->fd, 0, SEEK_CUR)) < 0)
|
||||
return -1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static long g729_tell(struct ast_filestream *fs)
|
||||
{
|
||||
off_t offset;
|
||||
offset = lseek(fs->fd, 0, SEEK_CUR);
|
||||
return (offset/20)*160;
|
||||
}
|
||||
|
||||
int load_module()
|
||||
{
|
||||
return ast_format_register(name, exts, AST_FORMAT_G729A,
|
||||
g729_open,
|
||||
g729_rewrite,
|
||||
g729_apply,
|
||||
g729_play,
|
||||
g729_write,
|
||||
g729_seek,
|
||||
g729_trunc,
|
||||
g729_tell,
|
||||
g729_read,
|
||||
g729_close,
|
||||
g729_getcomment);
|
||||
|
||||
|
||||
}
|
||||
|
||||
int unload_module()
|
||||
{
|
||||
struct ast_filestream *tmp, *tmpl;
|
||||
if (ast_pthread_mutex_lock(&g729_lock)) {
|
||||
ast_log(LOG_WARNING, "Unable to lock g729 list\n");
|
||||
return -1;
|
||||
}
|
||||
tmp = glist;
|
||||
while(tmp) {
|
||||
if (tmp->owner)
|
||||
ast_softhangup(tmp->owner, AST_SOFTHANGUP_APPUNLOAD);
|
||||
tmpl = tmp;
|
||||
tmp = tmp->next;
|
||||
free(tmpl);
|
||||
}
|
||||
ast_pthread_mutex_unlock(&g729_lock);
|
||||
return ast_format_unregister(name);
|
||||
}
|
||||
|
||||
int usecount()
|
||||
{
|
||||
int res;
|
||||
if (ast_pthread_mutex_lock(&g729_lock)) {
|
||||
ast_log(LOG_WARNING, "Unable to lock g729 list\n");
|
||||
return -1;
|
||||
}
|
||||
res = glistcnt;
|
||||
ast_pthread_mutex_unlock(&g729_lock);
|
||||
return res;
|
||||
}
|
||||
|
||||
char *description()
|
||||
{
|
||||
return desc;
|
||||
}
|
||||
|
||||
|
||||
char *key()
|
||||
{
|
||||
return ASTERISK_GPL_KEY;
|
||||
}
|
||||
Loading…
Reference in new issue