Another very inappropriate placement of a ')' (again introduced in r362151) caused the various truncate operations to attempt to truncate the sound file at a position of '0'. (issue ASTERISK-19655) Reported by: Matt Jordan (issue ASTERISK-19810) Reported by: colbec ........ Merged revisions 364578 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 364579 from http://svn.asterisk.org/svn/asterisk/branches/10 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@364580 65c4cc65-6c06-0410-ace0-fbb531ad65f3
212 lines
5.7 KiB
C
212 lines
5.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Save to raw, headerless GSM data.
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* \arg File name extension: gsm
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* \ingroup formats
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/mod_format.h"
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#include "asterisk/module.h"
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#include "asterisk/endian.h"
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#include "msgsm.h"
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/* Some Ideas for this code came from makegsme.c by Jeffrey Chilton */
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/* Portions of the conversion code are by guido@sienanet.it */
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#define GSM_FRAME_SIZE 33
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#define GSM_SAMPLES 160
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/* silent gsm frame */
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/* begin binary data: */
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static const char gsm_silence[] = /* 33 */
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{0xD8,0x20,0xA2,0xE1,0x5A,0x50,0x00,0x49,0x24,0x92,0x49,0x24,0x50,0x00,0x49
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,0x24,0x92,0x49,0x24,0x50,0x00,0x49,0x24,0x92,0x49,0x24,0x50,0x00,0x49,0x24
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,0x92,0x49,0x24};
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/* end binary data. size = 33 bytes */
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static struct ast_frame *gsm_read(struct ast_filestream *s, int *whennext)
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{
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int res;
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s->fr.frametype = AST_FRAME_VOICE;
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ast_format_set(&s->fr.subclass.format, AST_FORMAT_GSM, 0);
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AST_FRAME_SET_BUFFER(&(s->fr), s->buf, AST_FRIENDLY_OFFSET, GSM_FRAME_SIZE)
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s->fr.mallocd = 0;
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if ((res = fread(s->fr.data.ptr, 1, GSM_FRAME_SIZE, s->f)) != GSM_FRAME_SIZE) {
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if (res)
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ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
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return NULL;
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}
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*whennext = s->fr.samples = GSM_SAMPLES;
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return &s->fr;
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}
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static int gsm_write(struct ast_filestream *fs, struct ast_frame *f)
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{
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int res;
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unsigned char gsm[2*GSM_FRAME_SIZE];
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if (f->frametype != AST_FRAME_VOICE) {
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ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
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return -1;
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}
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if (f->subclass.format.id != AST_FORMAT_GSM) {
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ast_log(LOG_WARNING, "Asked to write non-GSM frame (%s)!\n", ast_getformatname(&f->subclass.format));
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return -1;
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}
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if (!(f->datalen % 65)) {
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/* This is in MSGSM format, need to be converted */
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int len=0;
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while(len < f->datalen) {
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conv65(f->data.ptr + len, gsm);
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if ((res = fwrite(gsm, 1, 2*GSM_FRAME_SIZE, fs->f)) != 2*GSM_FRAME_SIZE) {
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ast_log(LOG_WARNING, "Bad write (%d/66): %s\n", res, strerror(errno));
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return -1;
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}
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len += 65;
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}
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} else {
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if (f->datalen % GSM_FRAME_SIZE) {
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ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 33\n", f->datalen);
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return -1;
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}
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if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
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ast_log(LOG_WARNING, "Bad write (%d/33): %s\n", res, strerror(errno));
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return -1;
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}
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}
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return 0;
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}
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static int gsm_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
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{
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off_t offset = 0, min = 0, cur, max, distance;
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if ((cur = ftello(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine current position in g719 filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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if (fseeko(fs->f, 0, SEEK_END) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to seek to end of g719 filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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if ((max = ftello(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine max position in g719 filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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/* have to fudge to frame here, so not fully to sample */
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distance = (sample_offset / GSM_SAMPLES) * GSM_FRAME_SIZE;
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if (whence == SEEK_SET) {
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offset = distance;
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} else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) {
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offset = distance + cur;
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} else if (whence == SEEK_END) {
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offset = max - distance;
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}
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/* Always protect against seeking past the begining. */
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offset = (offset < min)?min:offset;
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if (whence != SEEK_FORCECUR) {
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offset = (offset > max)?max:offset;
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} else if (offset > max) {
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int i;
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fseeko(fs->f, 0, SEEK_END);
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for (i=0; i< (offset - max) / GSM_FRAME_SIZE; i++) {
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if (!fwrite(gsm_silence, 1, GSM_FRAME_SIZE, fs->f)) {
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ast_log(LOG_WARNING, "fwrite() failed: %s\n", strerror(errno));
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}
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}
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}
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return fseeko(fs->f, offset, SEEK_SET);
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}
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static int gsm_trunc(struct ast_filestream *fs)
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{
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int fd;
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off_t cur;
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if ((fd = fileno(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for gsm filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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if ((cur = ftello(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine current position in gsm filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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/* Truncate file to current length */
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return ftruncate(fd, cur);
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}
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static off_t gsm_tell(struct ast_filestream *fs)
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{
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off_t offset = ftello(fs->f);
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if (offset < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine offset for gsm filestream %p: %s\n", fs, strerror(errno));
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return 0;
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}
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return (offset / GSM_FRAME_SIZE) * GSM_SAMPLES;
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}
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static struct ast_format_def gsm_f = {
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.name = "gsm",
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.exts = "gsm",
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.write = gsm_write,
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.seek = gsm_seek,
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.trunc = gsm_trunc,
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.tell = gsm_tell,
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.read = gsm_read,
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.buf_size = 2*GSM_FRAME_SIZE + AST_FRIENDLY_OFFSET, /* 2 gsm frames */
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};
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static int load_module(void)
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{
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ast_format_set(&gsm_f.format, AST_FORMAT_GSM, 0);
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if (ast_format_def_register(&gsm_f))
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return AST_MODULE_LOAD_FAILURE;
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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return ast_format_def_unregister(gsm_f.name);
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Raw GSM data",
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.load = load_module,
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.unload = unload_module,
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.load_pri = AST_MODPRI_APP_DEPEND
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);
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