initial checkin

Check in contents of upstream 1.4.2 tarball, exclude generated files.

1 files changed, 73 insertions, 0 deletions

diff --git a/src/audio/media_buffer.h b/src/audio/media_buffer.h
new file mode 100644
index 0000000..80658f6
--- /dev/null
+++ b/src/audio/media_buffer.h
@@ -0,0 +1,73 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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
+*/
+
+#ifndef _MEDIA_BUFFER_H
+#define _MEDIA_BUFFER_H
+
+#include "threads/mutex.h"
+
+// A buffer for buffering media streams.
+// Used for conference calls to buffer one stream that needs to be
+// mixed with the main stream.
+
+class t_media_buffer {
+private:
+	// The buffer. It is used as a ring buffer
+	unsigned char	*buffer;
+
+	// Size of the buffer
+	int		buf_size;
+
+	// Begin and end position of the buffer content.
+	// pos_end points to the last byte of content.
+	int		pos_start;
+	int		pos_end;
+
+	// Inidicates if buffer is empty
+	bool		empty;
+
+	// Mutex to protect operations on the buffer
+	t_recursive_mutex mtx;
+
+	// Prevent this constructor from being used.
+	t_media_buffer() {};
+
+public:
+	// Create a media buffer of size size.
+	t_media_buffer(int size);
+	~t_media_buffer();
+
+	// Add data to buffer. If there is more data than buffer
+	// space left, then old content will be removed from the
+	// buffer.
+	// - data is the data to be added
+	// - len is the number of bytes to be added
+	void add(unsigned char *data, int len);
+
+	// Get data from the buffer. If there is not enough data
+	// in the buffer, then no data is retrieved at all.
+	// False is returned if data cannot be retrieved.
+	// - data must point to a buffer of at least size len
+	// - len is the amount of bytes to be retrieved
+	bool get(unsigned char *data, int len);
+
+	// Return the number of bytes contained by the buffer.
+	int size_content(void);
+};
+
+#endif