c3a6c8fd2d
Some formats are able to handle short reads while others are not, so restore the previous behavior for the format modules so that we don't have spurious errors when playing back files. ASTERISK-27232 #close Reported by: Jens T. Change-Id: Iab7f52b25a394f277566c8a2a4b15a692280a300
157 lines
4 KiB
C
157 lines
4 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Brian K. West <brian@bkw.org>
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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 iLBC data.
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* \arg File name extension: ilbc
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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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#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 "asterisk/format_cache.h"
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/* Some Ideas for this code came from makeg729e.c by Jeffrey Chilton */
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/* Portions of the conversion code are by guido@sienanet.it */
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#define ILBC_BUF_SIZE 50 /* One Real iLBC Frame */
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#define ILBC_SAMPLES 240
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static struct ast_frame *ilbc_read(struct ast_filestream *s, int *whennext)
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{
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size_t res;
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/* Send a frame from the file to the appropriate channel */
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AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, ILBC_BUF_SIZE);
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if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
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if (res) {
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ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
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ast_format_get_name(s->fr.subclass.format), s->fr.datalen, res,
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strerror(errno));
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}
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return NULL;
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}
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*whennext = s->fr.samples = ILBC_SAMPLES;
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return &s->fr;
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}
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static int ilbc_write(struct ast_filestream *fs, struct ast_frame *f)
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{
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int res;
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if (f->datalen % 50) {
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ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 50\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/50): %s\n", res, strerror(errno));
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return -1;
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}
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return 0;
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}
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static int ilbc_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
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{
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long bytes;
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off_t min,cur,max,offset=0;
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min = 0;
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cur = ftello(fs->f);
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fseeko(fs->f, 0, SEEK_END);
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max = ftello(fs->f);
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bytes = ILBC_BUF_SIZE * (sample_offset / ILBC_SAMPLES);
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if (whence == SEEK_SET)
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offset = bytes;
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else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
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offset = cur + bytes;
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else if (whence == SEEK_END)
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offset = max - bytes;
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if (whence != SEEK_FORCECUR) {
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offset = (offset > max)?max:offset;
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}
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/* protect against seeking beyond begining. */
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offset = (offset < min)?min:offset;
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if (fseeko(fs->f, offset, SEEK_SET) < 0)
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return -1;
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return 0;
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}
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static int ilbc_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 iLBC 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 iLBC 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 ilbc_tell(struct ast_filestream *fs)
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{
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off_t offset = ftello(fs->f);
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return (offset/ILBC_BUF_SIZE)*ILBC_SAMPLES;
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}
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static struct ast_format_def ilbc_f = {
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.name = "iLBC",
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.exts = "ilbc",
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.write = ilbc_write,
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.seek = ilbc_seek,
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.trunc = ilbc_trunc,
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.tell = ilbc_tell,
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.read = ilbc_read,
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.buf_size = ILBC_BUF_SIZE + AST_FRIENDLY_OFFSET,
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};
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static int load_module(void)
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{
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ilbc_f.format = ast_format_ilbc;
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if (ast_format_def_register(&ilbc_f))
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return AST_MODULE_LOAD_DECLINE;
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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(ilbc_f.name);
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Raw iLBC data",
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.support_level = AST_MODULE_SUPPORT_CORE,
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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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