git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5490 65c4cc65-6c06-0410-ace0-fbb531ad65f3
240 lines
5.7 KiB
C
Executable file
240 lines
5.7 KiB
C
Executable file
/*
|
|
* Asterisk -- A telephony toolkit for Linux.
|
|
*
|
|
* Flat, binary, ADPCM vox file format.
|
|
*
|
|
* 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 "asterisk/endian.h"
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <stdlib.h>
|
|
#include <sys/time.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#define BUF_SIZE 80 /* 160 samples */
|
|
|
|
struct ast_filestream {
|
|
void *reserved[AST_RESERVED_POINTERS];
|
|
/* This is what a filestream means to us */
|
|
int fd; /* Descriptor */
|
|
struct ast_frame fr; /* Frame information */
|
|
char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */
|
|
char empty; /* Empty character */
|
|
unsigned char buf[BUF_SIZE]; /* Output Buffer */
|
|
int lasttimeout;
|
|
struct timeval last;
|
|
short signal; /* Signal level (file side) */
|
|
short ssindex; /* Signal ssindex (file side) */
|
|
unsigned char zero_count; /* counter of consecutive zero samples */
|
|
unsigned char next_flag;
|
|
};
|
|
|
|
|
|
AST_MUTEX_DEFINE_STATIC(vox_lock);
|
|
static int glistcnt = 0;
|
|
|
|
static char *name = "vox";
|
|
static char *desc = "Dialogic VOX (ADPCM) File Format";
|
|
static char *exts = "vox";
|
|
|
|
static struct ast_filestream *vox_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(&vox_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock vox list\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
tmp->fr.data = tmp->buf;
|
|
tmp->fr.frametype = AST_FRAME_VOICE;
|
|
tmp->fr.subclass = AST_FORMAT_ADPCM;
|
|
/* datalen will vary for each frame */
|
|
tmp->fr.src = name;
|
|
tmp->fr.mallocd = 0;
|
|
tmp->lasttimeout = -1;
|
|
glistcnt++;
|
|
ast_mutex_unlock(&vox_lock);
|
|
ast_update_use_count();
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static struct ast_filestream *vox_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(&vox_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock vox list\n");
|
|
free(tmp);
|
|
return NULL;
|
|
}
|
|
tmp->fd = fd;
|
|
glistcnt++;
|
|
ast_mutex_unlock(&vox_lock);
|
|
ast_update_use_count();
|
|
} else
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
return tmp;
|
|
}
|
|
|
|
static void vox_close(struct ast_filestream *s)
|
|
{
|
|
if (ast_mutex_lock(&vox_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock vox list\n");
|
|
return;
|
|
}
|
|
glistcnt--;
|
|
ast_mutex_unlock(&vox_lock);
|
|
ast_update_use_count();
|
|
close(s->fd);
|
|
free(s);
|
|
s = NULL;
|
|
}
|
|
|
|
static struct ast_frame *vox_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_ADPCM;
|
|
s->fr.offset = AST_FRIENDLY_OFFSET;
|
|
s->fr.mallocd = 0;
|
|
s->fr.data = s->buf;
|
|
if ((res = read(s->fd, s->buf, BUF_SIZE)) < 1) {
|
|
if (res)
|
|
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
|
|
return NULL;
|
|
}
|
|
s->fr.samples = res * 2;
|
|
s->fr.datalen = res;
|
|
*whennext = s->fr.samples;
|
|
return &s->fr;
|
|
}
|
|
|
|
static int vox_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_ADPCM) {
|
|
ast_log(LOG_WARNING, "Asked to write non-ADPCM frame (%d)!\n", f->subclass);
|
|
return -1;
|
|
}
|
|
if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
|
|
ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static char *vox_getcomment(struct ast_filestream *s)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static int vox_seek(struct ast_filestream *fs, long sample_offset, int whence)
|
|
{
|
|
off_t offset=0,min,cur,max,distance;
|
|
|
|
min = 0;
|
|
cur = lseek(fs->fd, 0, SEEK_CUR);
|
|
max = lseek(fs->fd, 0, SEEK_END);
|
|
/* have to fudge to frame here, so not fully to sample */
|
|
distance = sample_offset/2;
|
|
if(whence == SEEK_SET)
|
|
offset = distance;
|
|
else if(whence == SEEK_CUR || whence == SEEK_FORCECUR)
|
|
offset = distance + cur;
|
|
else if(whence == SEEK_END)
|
|
offset = max - distance;
|
|
if (whence != SEEK_FORCECUR) {
|
|
offset = (offset > max)?max:offset;
|
|
offset = (offset < min)?min:offset;
|
|
}
|
|
return lseek(fs->fd, offset, SEEK_SET);
|
|
}
|
|
|
|
static int vox_trunc(struct ast_filestream *fs)
|
|
{
|
|
return ftruncate(fs->fd, lseek(fs->fd,0,SEEK_CUR));
|
|
}
|
|
|
|
static long vox_tell(struct ast_filestream *fs)
|
|
{
|
|
off_t offset;
|
|
offset = lseek(fs->fd, 0, SEEK_CUR);
|
|
return offset;
|
|
}
|
|
|
|
int load_module()
|
|
{
|
|
return ast_format_register(name, exts, AST_FORMAT_ADPCM,
|
|
vox_open,
|
|
vox_rewrite,
|
|
vox_write,
|
|
vox_seek,
|
|
vox_trunc,
|
|
vox_tell,
|
|
vox_read,
|
|
vox_close,
|
|
vox_getcomment);
|
|
|
|
|
|
}
|
|
|
|
int unload_module()
|
|
{
|
|
return ast_format_unregister(name);
|
|
}
|
|
|
|
int usecount()
|
|
{
|
|
int res;
|
|
if (ast_mutex_lock(&vox_lock)) {
|
|
ast_log(LOG_WARNING, "Unable to lock vox list\n");
|
|
return -1;
|
|
}
|
|
res = glistcnt;
|
|
ast_mutex_unlock(&vox_lock);
|
|
return res;
|
|
}
|
|
|
|
char *description()
|
|
{
|
|
return desc;
|
|
}
|
|
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|