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// Copyright 2013 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 REMOTING_CODEC_VIDEO_ENCODER_VPX_H_
#define REMOTING_CODEC_VIDEO_ENCODER_VPX_H_
#include <stdint.h>
#include "base/callback.h"
#include "base/macros.h"
#include "base/time/default_tick_clock.h"
#include "base/time/time.h"
#include "remoting/codec/scoped_vpx_codec.h"
#include "remoting/codec/video_encoder.h"
#include "remoting/codec/video_encoder_helper.h"
typedef struct vpx_image vpx_image_t;
namespace webrtc {
class DesktopRegion;
class DesktopSize;
} // namespace webrtc
namespace remoting {
class VideoEncoderVpx : public VideoEncoder {
public:
// Create encoder for the specified protocol.
static std::unique_ptr<VideoEncoderVpx> CreateForVP8();
static std::unique_ptr<VideoEncoderVpx> CreateForVP9();
~VideoEncoderVpx() override;
void SetTickClockForTests(base::TickClock* tick_clock);
// VideoEncoder interface.
void SetLosslessEncode(bool want_lossless) override;
void SetLosslessColor(bool want_lossless) override;
std::unique_ptr<VideoPacket> Encode(
const webrtc::DesktopFrame& frame) override;
private:
explicit VideoEncoderVpx(bool use_vp9);
// (Re)Configures this instance to encode frames of the specified |size|,
// with the configured lossless color & encoding modes.
void Configure(const webrtc::DesktopSize& size);
// Prepares |image_| for encoding. Writes updated rectangles into
// |updated_region|.
void PrepareImage(const webrtc::DesktopFrame& frame,
webrtc::DesktopRegion* updated_region);
// Updates the active map according to |updated_region|. Active map is then
// given to the encoder to speed up encoding.
void SetActiveMapFromRegion(const webrtc::DesktopRegion& updated_region);
// Adds areas changed in the most recent frame to |updated_region|. This
// includes both content changes and areas enhanced by cyclic refresh.
void UpdateRegionFromActiveMap(webrtc::DesktopRegion* updated_region);
// True if the encoder is for VP9, false for VP8.
const bool use_vp9_;
// Options controlling VP9 encode quantization and color space.
// These are always off (false) for VP8.
bool lossless_encode_ = false;
bool lossless_color_ = false;
// Holds the initialized & configured codec.
ScopedVpxCodec codec_;
// Used to generate zero-based frame timestamps.
base::TimeTicks timestamp_base_;
// VPX image and buffer to hold the actual YUV planes.
std::unique_ptr<vpx_image_t> image_;
std::unique_ptr<uint8_t[]> image_buffer_;
// Active map used to optimize out processing of un-changed macroblocks.
std::unique_ptr<uint8_t[]> active_map_;
webrtc::DesktopSize active_map_size_;
// True if the codec wants unchanged frames to finish topping-off with.
bool encode_unchanged_frame_;
// Used to help initialize VideoPackets from DesktopFrames.
VideoEncoderHelper helper_;
base::DefaultTickClock default_tick_clock_;
base::TickClock* clock_;
DISALLOW_COPY_AND_ASSIGN(VideoEncoderVpx);
};
} // namespace remoting
#endif // REMOTING_CODEC_VIDEO_ENCODER_VP8_H_