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media / video / alpha_video_encoder_wrapper.h [blame]
// Copyright 2023 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_VIDEO_ALPHA_VIDEO_ENCODER_WRAPPER_H_
#define MEDIA_VIDEO_ALPHA_VIDEO_ENCODER_WRAPPER_H_
#include <memory>
#include <vector>
#include "base/containers/circular_deque.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "media/base/media_export.h"
#include "media/base/video_encoder.h"
#include "media/base/video_frame_pool.h"
#include "ui/gfx/color_space.h"
#include "ui/gfx/geometry/size.h"
namespace media {
// A wrapper around video encoder that splits frames with alpha channel between
// two underlying encoders - one for regular pixel data and the other for
// transparency channel.
// Encoded data from both encoders is merged and returned via `output_cb`.
class MEDIA_EXPORT AlphaVideoEncoderWrapper : public VideoEncoder {
public:
AlphaVideoEncoderWrapper(std::unique_ptr<VideoEncoder> yuv_encoder,
std::unique_ptr<VideoEncoder> alpha_encoder);
~AlphaVideoEncoderWrapper() override;
// VideoEncoder implementation.
void Initialize(VideoCodecProfile profile,
const Options& options,
EncoderInfoCB info_cb,
OutputCB output_cb,
EncoderStatusCB done_cb) override;
void Encode(scoped_refptr<VideoFrame> frame,
const EncodeOptions& encode_options,
EncoderStatusCB done_cb) override;
void ChangeOptions(const Options& options,
OutputCB output_cb,
EncoderStatusCB done_cb) override;
void Flush(EncoderStatusCB done_cb) override;
private:
void YuvOutputCallback(VideoEncoderOutput output,
std::optional<CodecDescription> desc);
void AlphaOutputCallback(VideoEncoderOutput output,
std::optional<CodecDescription> desc);
std::unique_ptr<VideoEncoder> yuv_encoder_;
std::unique_ptr<VideoEncoder> alpha_encoder_;
std::optional<VideoEncoderOutput> yuv_output_;
std::optional<VideoEncoderOutput> alpha_output_;
std::optional<EncoderStatus> init_status_;
std::optional<EncoderStatus> encode_status_;
std::vector<uint8_t> dummy_uv_planes_;
OutputCB output_cb_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<AlphaVideoEncoderWrapper> weak_factory_{this};
};
} // namespace media
#endif // MEDIA_VIDEO_ALPHA_VIDEO_ENCODER_WRAPPER_H_