diff options
Diffstat (limited to '1.4.23-rc4/formats/format_gsm.c')
| -rw-r--r-- | 1.4.23-rc4/formats/format_gsm.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/1.4.23-rc4/formats/format_gsm.c b/1.4.23-rc4/formats/format_gsm.c deleted file mode 100644 index 37fbd2382..000000000 --- a/1.4.23-rc4/formats/format_gsm.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * 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 GSM data. - * \arg File name extension: gsm - * \ingroup formats - */ - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include <unistd.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <stdlib.h> -#include <sys/time.h> -#include <stdio.h> -#include <errno.h> -#include <string.h> - -#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 "msgsm.h" - -/* Some Ideas for this code came from makegsme.c by Jeffrey Chilton */ - -/* Portions of the conversion code are by guido@sienanet.it */ - -#define GSM_FRAME_SIZE 33 -#define GSM_SAMPLES 160 - -/* silent gsm frame */ -/* begin binary data: */ -char gsm_silence[] = /* 33 */ -{0xD8,0x20,0xA2,0xE1,0x5A,0x50,0x00,0x49,0x24,0x92,0x49,0x24,0x50,0x00,0x49 -,0x24,0x92,0x49,0x24,0x50,0x00,0x49,0x24,0x92,0x49,0x24,0x50,0x00,0x49,0x24 -,0x92,0x49,0x24}; -/* end binary data. size = 33 bytes */ - -static struct ast_frame *gsm_read(struct ast_filestream *s, int *whennext) -{ - int res; - - s->fr.frametype = AST_FRAME_VOICE; - s->fr.subclass = AST_FORMAT_GSM; - AST_FRAME_SET_BUFFER(&(s->fr), s->buf, AST_FRIENDLY_OFFSET, GSM_FRAME_SIZE) - s->fr.mallocd = 0; - if ((res = fread(s->fr.data, 1, GSM_FRAME_SIZE, s->f)) != GSM_FRAME_SIZE) { - if (res) - ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); - return NULL; - } - *whennext = s->fr.samples = GSM_SAMPLES; - return &s->fr; -} - -static int gsm_write(struct ast_filestream *fs, struct ast_frame *f) -{ - int res; - unsigned char gsm[2*GSM_FRAME_SIZE]; - - if (f->frametype != AST_FRAME_VOICE) { - ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); - return -1; - } - if (f->subclass != AST_FORMAT_GSM) { - ast_log(LOG_WARNING, "Asked to write non-GSM frame (%d)!\n", f->subclass); - return -1; - } - if (!(f->datalen % 65)) { - /* This is in MSGSM format, need to be converted */ - int len=0; - while(len < f->datalen) { - conv65(f->data + len, gsm); - if ((res = fwrite(gsm, 1, 2*GSM_FRAME_SIZE, fs->f)) != 2*GSM_FRAME_SIZE) { - ast_log(LOG_WARNING, "Bad write (%d/66): %s\n", res, strerror(errno)); - return -1; - } - len += 65; - } - } else { - if (f->datalen % GSM_FRAME_SIZE) { - ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 33\n", f->datalen); - return -1; - } - if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { - ast_log(LOG_WARNING, "Bad write (%d/33): %s\n", res, strerror(errno)); - return -1; - } - } - return 0; -} - -static int gsm_seek(struct ast_filestream *fs, off_t sample_offset, int whence) -{ - off_t offset=0,min,cur,max,distance; - - min = 0; - cur = ftello(fs->f); - fseeko(fs->f, 0, SEEK_END); - max = ftello(fs->f); - /* have to fudge to frame here, so not fully to sample */ - distance = (sample_offset/GSM_SAMPLES) * GSM_FRAME_SIZE; - 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; - /* Always protect against seeking past the begining. */ - offset = (offset < min)?min:offset; - if (whence != SEEK_FORCECUR) { - offset = (offset > max)?max:offset; - } else if (offset > max) { - int i; - fseeko(fs->f, 0, SEEK_END); - for (i=0; i< (offset - max) / GSM_FRAME_SIZE; i++) { - if (!fwrite(gsm_silence, 1, GSM_FRAME_SIZE, fs->f)) { - ast_log(LOG_WARNING, "fwrite() failed: %s\n", strerror(errno)); - } - } - } - return fseeko(fs->f, offset, SEEK_SET); -} - -static int gsm_trunc(struct ast_filestream *fs) -{ - return ftruncate(fileno(fs->f), ftello(fs->f)); -} - -static off_t gsm_tell(struct ast_filestream *fs) -{ - off_t offset = ftello(fs->f); - return (offset/GSM_FRAME_SIZE)*GSM_SAMPLES; -} - -static const struct ast_format gsm_f = { - .name = "gsm", - .exts = "gsm", - .format = AST_FORMAT_GSM, - .write = gsm_write, - .seek = gsm_seek, - .trunc = gsm_trunc, - .tell = gsm_tell, - .read = gsm_read, - .buf_size = 2*GSM_FRAME_SIZE + AST_FRIENDLY_OFFSET, /* 2 gsm frames */ -}; - -static int load_module(void) -{ - return ast_format_register(&gsm_f); -} - -static int unload_module(void) -{ - return ast_format_unregister(gsm_f.name); -} - -AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Raw GSM data"); |