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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_VIDEO_VIDEO_DECODE_ENGINE_H_
#define MEDIA_VIDEO_VIDEO_DECODE_ENGINE_H_
#include "base/memory/ref_counted.h"
#include "media/base/media_export.h"
namespace media {
class Buffer;
class VideoDecoderConfig;
class VideoFrame;
class MEDIA_EXPORT VideoDecodeEngine {
public:
virtual ~VideoDecodeEngine() {}
// Initialize the engine with specified configuration, returning true if
// successful.
virtual bool Initialize(const VideoDecoderConfig& config) = 0;
// Uninitialize the engine, freeing all resources. Calls to Flush() or
// Decode() will have no effect afterwards.
virtual void Uninitialize() = 0;
// Decode the encoded video data and store the result (if any) into
// |video_frame|. Note that a frame may not always be produced if the
// decode engine has insufficient encoded data. In such circumstances,
// additional calls to Decode() may be required.
//
// Returns true if decoding was successful (includes zero length input and end
// of stream), false if a decoding error occurred.
virtual bool Decode(const scoped_refptr<Buffer>& buffer,
scoped_refptr<VideoFrame>* video_frame) = 0;
// Discard all pending data that has yet to be returned via Decode().
virtual void Flush() = 0;
};
} // namespace media
#endif // MEDIA_VIDEO_VIDEO_DECODE_ENGINE_H_
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