1 files changed, 81 insertions, 0 deletions
diff --git a/src/lib/audio_buffers.h b/src/lib/audio_buffers.h
new file mode 100644
index 000000000..75bc686f8
--- /dev/null
+++ b/src/lib/audio_buffers.h
@@ -0,0 +1,81 @@
+/*
+    Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef DVDOMATIC_AUDIO_BUFFERS_H
+#define DVDOMATIC_AUDIO_BUFFERS_H
+
+#include <boost/shared_ptr.hpp>
+
+/** @class AudioBuffers
+ *  @brief A class to hold multi-channel audio data in float format.
+ */
+class AudioBuffers
+{
+public:
+	AudioBuffers (int channels, int frames);
+	AudioBuffers (AudioBuffers const &);
+	AudioBuffers (boost::shared_ptr<const AudioBuffers>);
+	~AudioBuffers ();
+
+	AudioBuffers & operator= (AudioBuffers const &);
+
+	void ensure_size (int);
+
+	float** data () const {
+		return _data;
+	}
+	
+	float* data (int) const;
+
+	int channels () const {
+		return _channels;
+	}
+
+	int frames () const {
+		return _frames;
+	}
+
+	void set_frames (int f);
+
+	void make_silent ();
+	void make_silent (int c);
+	void make_silent (int from, int frames);
+
+	void apply_gain (float);
+
+	void copy_from (AudioBuffers const * from, int frames_to_copy, int read_offset, int write_offset);
+	void move (int from, int to, int frames);
+	void accumulate_channel (AudioBuffers const *, int, int);
+	void accumulate_frames (AudioBuffers const *, int read_offset, int write_offset, int frames);
+
+private:
+	void allocate (int, int);
+	void deallocate ();
+	
+	/** Number of channels */
+	int _channels;
+	/** Number of frames (where a frame is one sample across all channels) */
+	int _frames;
+	/** Number of frames that _data can hold */
+	int _allocated_frames;
+	/** Audio data (so that, e.g. _data[2][6] is channel 2, sample 6) */
+	float** _data;
+};
+
+#endif