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// Copyright (c) 2010 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 CHROME_GPU_MEDIA_GPU_VIDEO_DEVICE_H_
#define CHROME_GPU_MEDIA_GPU_VIDEO_DEVICE_H_
#include <vector>
#include "media/base/video_frame.h"
#include "media/video/video_decode_context.h"
// A GpuVideoDevice is used by GpuVideoDecoder to allocate video frames
// meaningful to a corresponding VideoDecodeEngine.
//
// GpuVideoDecoder will provide a set of GL textures to this class and then
// GpuVideoDevice will transform the textures into a set of VideoFrame
// objects that can be used by VideoDecodeEngine.
//
// See text in GpuVideoDecoder for the overall flow for buffer allocation.
//
// Since all graphics commands execute on the main thread in the GPU process
// all the methods provided by this class are synchronous.
class GpuVideoDevice {
public:
virtual ~GpuVideoDevice() {}
// Get the hardware video decoding device handle.
virtual void* GetDevice() = 0;
// The following method is used by GpuVideoDecoder to create VideoFrame(s)
// associated with some GL textures.
//
// VideoFrame generated is used by VideoDecodeEngine for output buffer.
//
// |frame| will contain the VideoFrame generated.
//
// Return true if the operation was successful.
virtual bool CreateVideoFrameFromGlTextures(
size_t width, size_t height, media::VideoFrame::Format format,
const std::vector<media::VideoFrame::GlTexture>& textures,
scoped_refptr<media::VideoFrame>* frame) = 0;
// Release VideoFrame generated.
virtual void ReleaseVideoFrame(
const scoped_refptr<media::VideoFrame>& frame) = 0;
// Upload a device specific buffer to a VideoFrame object that can be used in
// the GPU process.
//
// Return true if successful.
// TODO(hclam): Rename this to ConvertToVideoFrame().
virtual bool UploadToVideoFrame(void* buffer,
scoped_refptr<media::VideoFrame> frame) = 0;
};
#endif // CHROME_GPU_MEDIA_GPU_VIDEO_DEVICE_H_
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