Version 0.1.0 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@86 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 342 insertions, 0 deletions

diff --git a/formats/format_g723.c b/formats/format_g723.c
new file mode 100755
index 000000000..827987049
--- /dev/null
+++ b/formats/format_g723.c
@@ -0,0 +1,342 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Old-style G.723 frame/timestamp format.
+ * 
+ * Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+ 
+#include <asterisk/channel.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/sched.h>
+#include <asterisk/module.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include "../channels/adtranvofr.h"
+
+
+#define G723_MAX_SIZE 1024
+
+struct ast_filestream {
+	/* First entry MUST be reserved for the channel type */
+	void *reserved[AST_RESERVED_POINTERS];
+	/* This is what a filestream means to us */
+	int fd; /* Descriptor */
+	u_int32_t lasttimeout;	/* Last amount of timeout */
+	struct ast_channel *owner;
+	struct ast_filestream *next;
+	struct ast_frame *fr;	/* Frame representation of buf */
+	struct timeval orig;	/* Original frame time */
+	char buf[G723_MAX_SIZE + AST_FRIENDLY_OFFSET];	/* Buffer for sending frames, etc */
+};
+
+
+static struct ast_filestream *glist = NULL;
+static pthread_mutex_t g723_lock = PTHREAD_MUTEX_INITIALIZER;
+static int glistcnt = 0;
+
+static char *name = "g723sf";
+static char *desc = "G.723.1 Simple Timestamp File Format";
+static char *exts = "g723";
+
+static struct ast_filestream *g723_open(int fd)
+{
+	/* 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)))) {
+		if (pthread_mutex_lock(&g723_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->next = glist;
+		glist = tmp;
+		tmp->fd = fd;
+		tmp->owner = NULL;
+		tmp->fr = (struct ast_frame *)tmp->buf;
+		tmp->fr->data = tmp->buf + sizeof(struct ast_frame);
+		tmp->fr->frametype = AST_FRAME_VOICE;
+		tmp->fr->subclass = AST_FORMAT_G723_1;
+		/* datalen will vary for each frame */
+		tmp->fr->src = name;
+		tmp->fr->mallocd = 0;
+		tmp->lasttimeout = -1;
+		tmp->orig.tv_usec = 0;
+		tmp->orig.tv_sec = 0;
+		glistcnt++;
+		pthread_mutex_unlock(&g723_lock);
+		ast_update_use_count();
+	}
+	return tmp;
+}
+
+static struct ast_filestream *g723_rewrite(int fd, 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)))) {
+		if (pthread_mutex_lock(&g723_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->next = glist;
+		glist = tmp;
+		tmp->fd = fd;
+		tmp->owner = NULL;
+		tmp->fr = NULL;
+		tmp->lasttimeout = -1;
+		glistcnt++;
+		pthread_mutex_unlock(&g723_lock);
+		ast_update_use_count();
+	} else
+		ast_log(LOG_WARNING, "Out of memory\n");
+	return tmp;
+}
+
+static struct ast_frame *g723_read(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+static void g723_close(struct ast_filestream *s)
+{
+	struct ast_filestream *tmp, *tmpl = NULL;
+	if (pthread_mutex_lock(&g723_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+		return;
+	}
+	tmp = glist;
+	while(tmp) {
+		if (tmp == s) {
+			if (tmpl)
+				tmpl->next = tmp->next;
+			else
+				glist = tmp->next;
+			break;
+		}
+		tmpl = tmp;
+		tmp = tmp->next;
+	}
+	glistcnt--;
+	if (s->owner) {
+		s->owner->stream = NULL;
+		if (s->owner->streamid > -1)
+			ast_sched_del(s->owner->sched, s->owner->streamid);
+		s->owner->streamid = -1;
+	}
+	pthread_mutex_unlock(&g723_lock);
+	ast_update_use_count();
+	if (!tmp) 
+		ast_log(LOG_WARNING, "Freeing a filestream we don't seem to own\n");
+	close(s->fd);
+	free(s);
+}
+
+static int ast_read_callback(void *data)
+{
+	u_int16_t size;
+	u_int32_t delay = -1;
+	int looper = 1;
+	int retval = 0;
+	int res;
+	struct ast_filestream *s = data;
+	/* Send a frame from the file to the appropriate channel */
+	while(looper) {
+		if (read(s->fd, &size, 2) != 2) {
+			/* Out of data, or the file is no longer valid.  In any case
+			   go ahead and stop the stream */
+			s->owner->streamid = -1;
+			return 0;
+		}
+		/* Looks like we have a frame to read from here */
+		size = ntohs(size);
+		if (size > G723_MAX_SIZE - sizeof(struct ast_frame)) {
+			ast_log(LOG_WARNING, "Size %d is invalid\n", size);
+			/* The file is apparently no longer any good, as we
+			   shouldn't ever get frames even close to this 
+			   size.  */
+			s->owner->streamid = -1;
+			return 0;
+		}
+		/* Read the data into the buffer */
+		s->fr->offset = AST_FRIENDLY_OFFSET;
+		s->fr->datalen = size;
+		s->fr->data = s->buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
+		if ((res = read(s->fd, s->fr->data , size)) != size) {
+			ast_log(LOG_WARNING, "Short read (%d of %d bytes) (%s)!\n", res, size, strerror(errno));
+			s->owner->streamid = -1;
+			return 0;
+		}
+		/* Read the delay for the next packet, and schedule again if necessary */
+		if (read(s->fd, &delay, 4) == 4) 
+			delay = ntohl(delay);
+		else
+			delay = -1;
+		/* Average out frames <= 40 ms */
+		if (delay < 41)
+			s->fr->timelen = 30;
+		else
+			s->fr->timelen = delay;
+		/* Unless there is no delay, we're going to exit out as soon as we
+		   have processed the current frame. */
+		if (delay > VOFR_FUDGE) {
+			looper = 0;
+			/* If there is a delay, lets schedule the next event */
+			if (delay != s->lasttimeout) {
+				/* We'll install the next timeout now. */
+				s->owner->streamid = ast_sched_add(s->owner->sched, 
+													  delay - VOFR_FUDGE, 
+													  ast_read_callback, s);
+				
+				s->lasttimeout = delay;
+			} else
+				/* Just come back again at the same time */
+				retval = -1;
+		}
+		/* Lastly, process the frame */
+		if (ast_write(s->owner, s->fr)) {
+			ast_log(LOG_WARNING, "Failed to write frame\n");
+			s->owner->streamid = -1;
+			return 0;
+		}
+	}
+	return retval;
+}
+
+static int g723_apply(struct ast_channel *c, struct ast_filestream *s)
+{
+	u_int32_t delay;
+	/* Select our owner for this stream, and get the ball rolling. */
+	s->owner = c;
+	/* Read and ignore the first delay */
+	if (read(s->fd, &delay, 4) != 4) {
+		ast_log(LOG_WARNING, "Bad stream?\n");
+		return -1;
+	}
+	ast_read_callback(s);
+	return 0;
+}
+
+static int g723_write(struct ast_filestream *fs, struct ast_frame *f)
+{
+	struct timeval now;
+	u_int32_t delay;
+	u_int16_t size;
+	int res;
+	if (fs->fr) {
+		ast_log(LOG_WARNING, "Asked to write on a read stream??\n");
+		return -1;
+	}
+	if (f->frametype != AST_FRAME_VOICE) {
+		ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
+		return -1;
+	}
+	if (f->subclass != AST_FORMAT_G723_1) {
+		ast_log(LOG_WARNING, "Asked to write non-g723 frame!\n");
+		return -1;
+	}
+	if (!(fs->orig.tv_usec || fs->orig.tv_sec)) {
+		/* First frame should have zeros for delay */
+		delay = 0;
+		if (gettimeofday(&fs->orig, NULL)) {
+			ast_log(LOG_WARNING, "gettimeofday() failed??  What is this?  Y2k?\n");
+			return -1;
+		}
+	} else {
+		if (gettimeofday(&now, NULL)) {
+			ast_log(LOG_WARNING, "gettimeofday() failed??  What is this?  Y2k?\n");
+			return -1;
+		}
+		delay = (now.tv_sec - fs->orig.tv_sec) * 1000 + (now.tv_usec - fs->orig.tv_usec) / 1000;
+		delay = htonl(delay);
+		fs->orig.tv_sec = now.tv_sec;
+		fs->orig.tv_usec = now.tv_usec;
+	}
+	if ((res = write(fs->fd, &delay, 4)) != 4) {
+		ast_log(LOG_WARNING, "Unable to write delay: res=%d (%s)\n", res, strerror(errno));
+		return -1;
+	}
+	size = htons(f->datalen);
+	if ((res =write(fs->fd, &size, 2)) != 2) {
+		ast_log(LOG_WARNING, "Unable to write size: res=%d (%s)\n", res, strerror(errno));
+		return -1;
+	}
+	if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
+		ast_log(LOG_WARNING, "Unable to write frame: res=%d (%s)\n", res, strerror(errno));
+		return -1;
+	}	
+	return 0;
+}
+
+char *g723_getcomment(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+int load_module()
+{
+	return ast_format_register(name, exts, AST_FORMAT_G723_1,
+								g723_open,
+								g723_rewrite,
+								g723_apply,
+								g723_write,
+								g723_read,
+								g723_close,
+								g723_getcomment);
+								
+								
+}
+
+int unload_module()
+{
+	struct ast_filestream *tmp, *tmpl;
+	if (pthread_mutex_lock(&g723_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+		return -1;
+	}
+	tmp = glist;
+	while(tmp) {
+		if (tmp->owner)
+			ast_softhangup(tmp->owner);
+		tmpl = tmp;
+		tmp = tmp->next;
+		free(tmpl);
+	}
+	pthread_mutex_unlock(&g723_lock);
+	return ast_format_unregister(name);
+}	
+
+int usecount()
+{
+	int res;
+	if (pthread_mutex_lock(&g723_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+		return -1;
+	}
+	res = glistcnt;
+	pthread_mutex_unlock(&g723_lock);
+	return res;
+}
+
+char *description()
+{
+	return desc;
+}
+