https://origsvn.digium.com/svn/asterisk/branches/1.8 ........ r279472 | tilghman | 2010-07-25 22:27:06 -0500 (Sun, 25 Jul 2010) | 2 lines Formats need to load before apps, because some apps call ast_format_str_reduce() at load time. ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@279473 65c4cc65-6c06-0410-ace0-fbb531ad65f3
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2008, Anthony Minessale and Digium, Inc.
|
|
* Anthony Minessale (anthmct@yahoo.com)
|
|
* Kevin P. Fleming <kpfleming@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*! \file
|
|
*
|
|
* \brief ITU G.722.1 (Siren7, licensed from Polycom) format, 32kbps bitrate only
|
|
* \arg File name extensions: siren7
|
|
* \ingroup formats
|
|
*/
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include "asterisk/mod_format.h"
|
|
#include "asterisk/module.h"
|
|
#include "asterisk/endian.h"
|
|
|
|
#define BUF_SIZE 80 /* 20 milliseconds == 80 bytes, 320 samples */
|
|
#define SAMPLES_TO_BYTES(x) x / (320 / 80)
|
|
#define BYTES_TO_SAMPLES(x) x * (320 / 80)
|
|
|
|
static struct ast_frame *siren7read(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.codec = AST_FORMAT_SIREN7;
|
|
s->fr.mallocd = 0;
|
|
AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE);
|
|
if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
|
|
if (res)
|
|
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
|
|
return NULL;
|
|
}
|
|
*whennext = s->fr.samples = BYTES_TO_SAMPLES(res);
|
|
return &s->fr;
|
|
}
|
|
|
|
static int siren7write(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.codec != AST_FORMAT_SIREN7) {
|
|
ast_log(LOG_WARNING, "Asked to write non-Siren7 frame (%s)!\n", ast_getformatname(f->subclass.codec));
|
|
return -1;
|
|
}
|
|
if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
|
|
ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int siren7seek(struct ast_filestream *fs, off_t sample_offset, int whence)
|
|
{
|
|
off_t offset = 0, min = 0, cur, max;
|
|
|
|
sample_offset = SAMPLES_TO_BYTES(sample_offset);
|
|
|
|
cur = ftello(fs->f);
|
|
|
|
fseeko(fs->f, 0, SEEK_END);
|
|
|
|
max = ftello(fs->f);
|
|
|
|
if (whence == SEEK_SET)
|
|
offset = sample_offset;
|
|
else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
|
|
offset = sample_offset + cur;
|
|
else if (whence == SEEK_END)
|
|
offset = max - sample_offset;
|
|
|
|
if (whence != SEEK_FORCECUR)
|
|
offset = (offset > max) ? max : offset;
|
|
|
|
/* always protect against seeking past begining. */
|
|
offset = (offset < min) ? min : offset;
|
|
|
|
return fseeko(fs->f, offset, SEEK_SET);
|
|
}
|
|
|
|
static int siren7trunc(struct ast_filestream *fs)
|
|
{
|
|
return ftruncate(fileno(fs->f), ftello(fs->f));
|
|
}
|
|
|
|
static off_t siren7tell(struct ast_filestream *fs)
|
|
{
|
|
return BYTES_TO_SAMPLES(ftello(fs->f));
|
|
}
|
|
|
|
static const struct ast_format siren7_f = {
|
|
.name = "siren7",
|
|
.exts = "siren7",
|
|
.format = AST_FORMAT_SIREN7,
|
|
.write = siren7write,
|
|
.seek = siren7seek,
|
|
.trunc = siren7trunc,
|
|
.tell = siren7tell,
|
|
.read = siren7read,
|
|
.buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET,
|
|
};
|
|
|
|
static int load_module(void)
|
|
{
|
|
if (ast_format_register(&siren7_f))
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
|
|
return AST_MODULE_LOAD_SUCCESS;
|
|
}
|
|
|
|
static int unload_module(void)
|
|
{
|
|
return ast_format_unregister(siren7_f.name);
|
|
}
|
|
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "ITU G.722.1 (Siren7, licensed from Polycom)",
|
|
.load = load_module,
|
|
.unload = unload_module,
|
|
.load_pri = AST_MODPRI_APP_DEPEND
|
|
);
|