Initial commit: TXW82x FPV v2.7.0.7-42229 SDK + project sources

sdk/app/spook/stream.c

@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2004 Nathan Lutchansky <lutchann@litech.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+ 
+#include <stdio.h>
+
+#include <event.h>
+#include <log.h>
+#include <frame.h>
+#include <stream.h>
+
+struct converter {
+	struct stream_destination *input;
+	struct stream *output;
+};
+
+static struct stream *stream_list = NULL;
+/*
+static void get_framerate( struct stream *s, int *fincr, int *fbase )
+{
+	struct stream_destination *dest =
+		(struct stream_destination *)s->private;
+
+	dest->stream->get_framerate( dest->stream, fincr, fbase );
+}
+
+static void set_running( struct stream *s, int running )
+{
+	set_waiting( (struct stream_destination *)s->private, running );
+}
+*/
+void deliver_frame_to_stream( struct frame *f, void *d )
+{
+	struct stream *s = (struct stream *)d; /* d: jpeg_encoder->output */
+	struct stream_destination *dest;
+
+	for( dest = s->dest_list; dest; dest = dest->next )
+	{
+		/* destination is waitint for frame ?*/
+		if( ! dest->waiting ) {
+			if(dest->disconnect_frame){
+				dest->disconnect_frame( f, dest->d );
+			}
+			continue;
+		} 
+		/*rtsp callback: next_live_frame, dest->d: source->track[t]*/
+		/*http callback: jpeg_next_frame, dest->d: source->track[t]*/
+		dest->process_frame( f, dest->d );
+		if(dest->disconnect_frame){			
+			dest->disconnect_frame( f, dest->d );
+		}
+	}
+	unref_frame( f );
+}
+
+static struct stream_destination *new_dest( struct stream *s,
+			frame_deliver_func process_frame, void *d )
+{
+	struct stream_destination *dest;
+
+	dest = (struct stream_destination *)
+			malloc( sizeof( struct stream_destination ) );
+	dest->next = s->dest_list;
+	dest->prev = NULL;
+	if( dest->next ) dest->next->prev = dest;
+	s->dest_list = dest;
+	dest->stream = s;
+	dest->waiting = 0;
+	dest->process_frame = process_frame;
+	dest->disconnect_frame = NULL;
+	dest->d = d;
+
+	return dest;
+}
+
+
+void disconnect_stream(struct stream_destination *dest,frame_disconnect_func disconnect_frame){
+	dest->disconnect_frame = disconnect_frame;
+}
+
+struct stream_destination *connect_to_stream( const char *name,
+		frame_deliver_func process_frame, void *d )
+{
+	struct stream *s;
+	int found_one = 0;
+
+	for( s = stream_list; s; s = s->next )
+		if( ! strcmp( s->name, name ) )
+			return new_dest( s, process_frame, d );
+	if( found_one )
+		spook_log( SL_ERR, "unable to convert stream %s", name );
+	return NULL;
+}
+
+void del_stream( struct stream *s )
+{
+	if( s->next ) s->next->prev = s->prev;
+	if( s->prev ) s->prev->next = s->next;
+	else stream_list = s->next;
+	free( s );
+}
+
+struct stream *new_stream( const char *name, int format, void *d )
+{
+	struct stream *s;
+
+	s = (struct stream *)malloc( sizeof( struct stream ) );
+	
+	s->next = stream_list;
+	s->prev = NULL;
+	if( s->next ) s->next->prev = s;
+	stream_list = s;
+	s->name = name;
+	s->format = format;
+	s->dest_list = NULL;
+	s->get_framerate = NULL;
+	s->set_running = NULL;
+	s->private = d;
+	return s;
+}
+
+void set_waiting( struct stream_destination *dest, int waiting )
+{
+	struct stream *s = dest->stream;
+
+	/* We call set_running every time a destination starts listening,
+	 * or when the last destination stops listening.  It is good to know
+	 * when new listeners come so maybe the source can send a keyframe. */
+
+	if( dest->waiting )
+	{
+		if( waiting ) return; /* no change in status */
+		dest->waiting = 0;
+
+		/* see if anybody else is listening */
+		for( dest = s->dest_list; dest; dest = dest->next )
+			waiting |= dest->waiting;
+		if( waiting ) return; /* others are still listening */
+	} else
+	{
+		if( ! waiting ) return; /* no change in status */
+		dest->waiting = 1;
+	}
+
+	s->set_running( s, waiting );
+}