1 files changed, 280 insertions, 0 deletions
diff --git a/1.2-netsec/formats/format_gsm.c b/1.2-netsec/formats/format_gsm.c
new file mode 100644
index 000000000..176c73a97
--- /dev/null
+++ b/1.2-netsec/formats/format_gsm.c
@@ -0,0 +1,280 @@
+/*
+ * 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;
+}