chromium/media/base/channel_mixer.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_BASE_CHANNEL_MIXER_H_
#define MEDIA_BASE_CHANNEL_MIXER_H_

#include <vector>

#include "media/base/channel_layout.h"
#include "media/base/media_export.h"

namespace media {

class AudioBus;
class AudioParameters;

// ChannelMixer is for converting audio between channel layouts.  The conversion
// matrix is built upon construction and used during each Transform() call.  The
// algorithm works by generating a conversion matrix mapping each output channel
// to list of input channels.  The transform renders all of the output channels,
// with each output channel rendered according to a weighted sum of the relevant
// input channels as defined in the matrix.
class MEDIA_EXPORT ChannelMixer { … };

}  // namespace media

#endif  // MEDIA_BASE_CHANNEL_MIXER_H_