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// Copyright 2018 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_GPU_CHROMEOS_LIBYUV_IMAGE_PROCESSOR_BACKEND_H_
#define MEDIA_GPU_CHROMEOS_LIBYUV_IMAGE_PROCESSOR_BACKEND_H_
#include <memory>
#include <vector>
#include "media/gpu/chromeos/image_processor_backend.h"
#include "media/gpu/media_gpu_export.h"
#include "ui/gfx/geometry/rect.h"
namespace media {
class VideoFrameMapper;
// A software image processor which uses libyuv to perform format conversion.
// It expects input VideoFrame is mapped into CPU space, and output VideoFrame
// is allocated in user space.
class MEDIA_GPU_EXPORT LibYUVImageProcessorBackend
: public ImageProcessorBackend {
public:
// Factory method to create LibYUVImageProcessorBackend to convert video
// format specified in input_config and output_config. Provided |error_cb|
// will be posted to the same thread Create() is called if an error occurs
// after initialization. Returns nullptr if it fails to create
// LibYUVImageProcessorBackend.
static std::unique_ptr<ImageProcessorBackend> Create(
const PortConfig& input_config,
const PortConfig& output_config,
const std::vector<OutputMode>& preferred_output_modes,
VideoRotation relative_rotation,
ErrorCB error_cb,
scoped_refptr<base::SequencedTaskRunner> backend_task_runner);
LibYUVImageProcessorBackend(const LibYUVImageProcessorBackend&) = delete;
LibYUVImageProcessorBackend& operator=(const LibYUVImageProcessorBackend&) =
delete;
// ImageProcessorBackend override
void Process(scoped_refptr<VideoFrame> input_frame,
scoped_refptr<VideoFrame> output_frame,
FrameReadyCB cb) override;
private:
LibYUVImageProcessorBackend(
std::unique_ptr<VideoFrameMapper> input_frame_mapper,
std::unique_ptr<VideoFrameMapper> output_frame_mapper,
scoped_refptr<VideoFrame> intermediate_frame,
const PortConfig& input_config,
const PortConfig& output_config,
OutputMode output_mode,
VideoRotation relative_rotation,
ErrorCB error_cb,
scoped_refptr<base::SequencedTaskRunner> backend_task_runner);
~LibYUVImageProcessorBackend() override;
void NotifyError();
// Execute Libyuv function for the conversion from |input| to |output|.
int DoConversion(const VideoFrame* const input, VideoFrame* const output);
const gfx::Rect input_visible_rect_;
const gfx::Rect output_visible_rect_;
const std::unique_ptr<VideoFrameMapper> input_frame_mapper_;
const std::unique_ptr<VideoFrameMapper> output_frame_mapper_;
// A VideoFrame for intermediate format conversion when there is no direct
// conversion method in libyuv, e.g., RGBA -> I420 (pivot) -> NV12.
scoped_refptr<VideoFrame> intermediate_frame_;
};
} // namespace media
#endif // MEDIA_GPU_CHROMEOS_LIBYUV_IMAGE_PROCESSOR_BACKEND_H_