c26c190711
This patch is the foundation of an entire new way of looking at media in Asterisk. The code present in this patch is everything required to complete phase1 of my Media Architecture proposal. For more information about this project visit the link below. https://wiki.asterisk.org/wiki/display/AST/Media+Architecture+Proposal The primary function of this patch is to convert all the usages of format bitfields in Asterisk to use the new format and format_cap APIs. Functionally no change in behavior should be present in this patch. Thanks to twilson and russell for all the time they spent reviewing these changes. Review: https://reviewboard.asterisk.org/r/1083/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@306010 65c4cc65-6c06-0410-ace0-fbb531ad65f3
153 lines
4.1 KiB
C
153 lines
4.1 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2005, Digium, Inc.
|
|
*
|
|
* Mark Spencer <markster@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 Save to raw, headerless G729 data.
|
|
* \note This is not an encoder/decoder. The codec fo g729 is only
|
|
* available with a commercial license from Digium, due to patent
|
|
* restrictions. Check http://www.digium.com for information.
|
|
* \arg Extensions: g729
|
|
* \ingroup formats
|
|
*/
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include "asterisk/mod_format.h"
|
|
#include "asterisk/module.h"
|
|
#include "asterisk/endian.h"
|
|
|
|
/* Some Ideas for this code came from makeg729e.c by Jeffrey Chilton */
|
|
|
|
/* Portions of the conversion code are by guido@sienanet.it */
|
|
|
|
#define BUF_SIZE 20 /* two G729 frames */
|
|
#define G729A_SAMPLES 160
|
|
|
|
static struct ast_frame *g729_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;
|
|
ast_format_set(&s->fr.subclass.format, AST_FORMAT_G729A, 0);
|
|
s->fr.mallocd = 0;
|
|
s->fr.samples = G729A_SAMPLES;
|
|
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 && (res != 10)) /* XXX what for ? */
|
|
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
|
|
return NULL;
|
|
}
|
|
*whennext = s->fr.samples;
|
|
return &s->fr;
|
|
}
|
|
|
|
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.format.id != AST_FORMAT_G729A) {
|
|
ast_log(LOG_WARNING, "Asked to write non-G729 frame (%s)!\n", ast_getformatname(&f->subclass.format));
|
|
return -1;
|
|
}
|
|
if (f->datalen % 10) {
|
|
ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 10\n", f->datalen);
|
|
return -1;
|
|
}
|
|
if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
|
|
ast_log(LOG_WARNING, "Bad write (%d/10): %s\n", res, strerror(errno));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int g729_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
|
|
{
|
|
long bytes;
|
|
off_t min,cur,max,offset=0;
|
|
min = 0;
|
|
cur = ftello(fs->f);
|
|
fseeko(fs->f, 0, SEEK_END);
|
|
max = ftello(fs->f);
|
|
|
|
bytes = BUF_SIZE * (sample_offset / G729A_SAMPLES);
|
|
if (whence == SEEK_SET)
|
|
offset = bytes;
|
|
else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
|
|
offset = cur + bytes;
|
|
else if (whence == SEEK_END)
|
|
offset = max - bytes;
|
|
if (whence != SEEK_FORCECUR) {
|
|
offset = (offset > max)?max:offset;
|
|
}
|
|
/* protect against seeking beyond begining. */
|
|
offset = (offset < min)?min:offset;
|
|
if (fseeko(fs->f, offset, SEEK_SET) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int g729_trunc(struct ast_filestream *fs)
|
|
{
|
|
/* Truncate file to current length */
|
|
if (ftruncate(fileno(fs->f), ftello(fs->f)) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static off_t g729_tell(struct ast_filestream *fs)
|
|
{
|
|
off_t offset = ftello(fs->f);
|
|
return (offset/BUF_SIZE)*G729A_SAMPLES;
|
|
}
|
|
|
|
static struct ast_format_def g729_f = {
|
|
.name = "g729",
|
|
.exts = "g729",
|
|
.write = g729_write,
|
|
.seek = g729_seek,
|
|
.trunc = g729_trunc,
|
|
.tell = g729_tell,
|
|
.read = g729_read,
|
|
.buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET,
|
|
};
|
|
|
|
static int load_module(void)
|
|
{
|
|
ast_format_set(&g729_f.format, AST_FORMAT_G729A, 0);
|
|
if (ast_format_def_register(&g729_f))
|
|
return AST_MODULE_LOAD_FAILURE;
|
|
return AST_MODULE_LOAD_SUCCESS;
|
|
}
|
|
|
|
static int unload_module(void)
|
|
{
|
|
return ast_format_def_unregister(g729_f.name);
|
|
}
|
|
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Raw G.729 data",
|
|
.load = load_module,
|
|
.unload = unload_module,
|
|
.load_pri = AST_MODPRI_APP_DEPEND
|
|
);
|