diff options
Diffstat (limited to '1.2-netsec/formats/format_gsm.c')
-rw-r--r-- | 1.2-netsec/formats/format_gsm.c | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/1.2-netsec/formats/format_gsm.c b/1.2-netsec/formats/format_gsm.c deleted file mode 100644 index 176c73a97..000000000 --- a/1.2-netsec/formats/format_gsm.c +++ /dev/null @@ -1,280 +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 <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.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#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 */ - -/* 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 */ - -struct ast_filestream { - void *reserved[AST_RESERVED_POINTERS]; - /* Believe it or not, we must decode/recode to account for the - weird MS format */ - /* This is what a filestream means to us */ - FILE *f; /* Descriptor */ - struct ast_frame fr; /* Frame information */ - char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */ - char empty; /* Empty character */ - unsigned char gsm[66]; /* Two Real GSM Frames */ -}; - - -AST_MUTEX_DEFINE_STATIC(gsm_lock); -static int glistcnt = 0; - -static char *name = "gsm"; -static char *desc = "Raw GSM data"; -static char *exts = "gsm"; - -static struct ast_filestream *gsm_open(FILE *f) -{ - /* We don't have any header to read or anything really, but - if we did, it would go here. We also might want to check - and be sure it's a valid file. */ - struct ast_filestream *tmp; - if ((tmp = malloc(sizeof(struct ast_filestream)))) { - memset(tmp, 0, sizeof(struct ast_filestream)); - if (ast_mutex_lock(&gsm_lock)) { - ast_log(LOG_WARNING, "Unable to lock gsm list\n"); - free(tmp); - return NULL; - } - tmp->f = f; - tmp->fr.data = tmp->gsm; - tmp->fr.frametype = AST_FRAME_VOICE; - tmp->fr.subclass = AST_FORMAT_GSM; - /* datalen will vary for each frame */ - tmp->fr.src = name; - tmp->fr.mallocd = 0; - glistcnt++; - ast_mutex_unlock(&gsm_lock); - ast_update_use_count(); - } - return tmp; -} - -static struct ast_filestream *gsm_rewrite(FILE *f, const char *comment) -{ - /* We don't have any header to read or anything really, but - if we did, it would go here. We also might want to check - and be sure it's a valid file. */ - struct ast_filestream *tmp; - if ((tmp = malloc(sizeof(struct ast_filestream)))) { - memset(tmp, 0, sizeof(struct ast_filestream)); - if (ast_mutex_lock(&gsm_lock)) { - ast_log(LOG_WARNING, "Unable to lock gsm list\n"); - free(tmp); - return NULL; - } - tmp->f = f; - glistcnt++; - ast_mutex_unlock(&gsm_lock); - ast_update_use_count(); - } else - ast_log(LOG_WARNING, "Out of memory\n"); - return tmp; -} - -static void gsm_close(struct ast_filestream *s) -{ - if (ast_mutex_lock(&gsm_lock)) { - ast_log(LOG_WARNING, "Unable to lock gsm list\n"); - return; - } - glistcnt--; - ast_mutex_unlock(&gsm_lock); - ast_update_use_count(); - fclose(s->f); - free(s); -} - -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; - s->fr.offset = AST_FRIENDLY_OFFSET; - s->fr.samples = 160; - s->fr.datalen = 33; - s->fr.mallocd = 0; - s->fr.data = s->gsm; - if ((res = fread(s->gsm, 1, 33, s->f)) != 33) { - if (res) - ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); - return NULL; - } - *whennext = 160; - return &s->fr; -} - -static int gsm_write(struct ast_filestream *fs, struct ast_frame *f) -{ - int res; - unsigned char gsm[66]; - 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, 66, fs->f)) != 66) { - ast_log(LOG_WARNING, "Bad write (%d/66): %s\n", res, strerror(errno)); - return -1; - } - len += 65; - } - } else { - if (f->datalen % 33) { - 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, long sample_offset, int whence) -{ - off_t offset=0,min,cur,max,distance; - - min = 0; - cur = ftell(fs->f); - fseek(fs->f, 0, SEEK_END); - max = ftell(fs->f); - /* have to fudge to frame here, so not fully to sample */ - distance = (sample_offset/160) * 33; - 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; - fseek(fs->f, 0, SEEK_END); - for (i=0; i< (offset - max) / 33; i++) { - fwrite(gsm_silence, 1, 33, fs->f); - } - } - return fseek(fs->f, offset, SEEK_SET); -} - -static int gsm_trunc(struct ast_filestream *fs) -{ - return ftruncate(fileno(fs->f), ftell(fs->f)); -} - -static long gsm_tell(struct ast_filestream *fs) -{ - off_t offset; - offset = ftell(fs->f); - return (offset/33)*160; -} - -static char *gsm_getcomment(struct ast_filestream *s) -{ - return NULL; -} - -int load_module() -{ - return ast_format_register(name, exts, AST_FORMAT_GSM, - gsm_open, - gsm_rewrite, - gsm_write, - gsm_seek, - gsm_trunc, - gsm_tell, - gsm_read, - gsm_close, - gsm_getcomment); - - -} - -int unload_module() -{ - return ast_format_unregister(name); -} - -int usecount() -{ - return glistcnt; -} - -char *description() -{ - return desc; -} - - -char *key() -{ - return ASTERISK_GPL_KEY; -} |