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// Copyright 2016 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_WEBRTC_VIDEO_ENCODER_VPX_H_
#define REMOTING_CODEC_WEBRTC_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/encoder_bitrate_filter.h"
#include "remoting/codec/scoped_vpx_codec.h"
#include "remoting/codec/webrtc_video_encoder.h"
#include "remoting/codec/webrtc_video_encoder_selector.h"
#include "third_party/libvpx/source/libvpx/vpx/vpx_encoder.h"
typedef struct vpx_image vpx_image_t;
namespace webrtc {
class DesktopRegion;
class DesktopSize;
} // namespace webrtc
namespace remoting {
// This is a copy of VideoEncoderVpx with enhancements to encoder for use
// over WebRTC as transport. The original VideoEncoderVpx should be deleted
// once the old implementation is no longer in use.
class WebrtcVideoEncoderVpx : public WebrtcVideoEncoder {
public:
// Creates encoder for the specified protocol.
static std::unique_ptr<WebrtcVideoEncoder> CreateForVP8();
static std::unique_ptr<WebrtcVideoEncoder> CreateForVP9();
// Checks the support for the specified protocol.
static bool IsSupportedByVP8(
const WebrtcVideoEncoderSelector::Profile& profile);
static bool IsSupportedByVP9(
const WebrtcVideoEncoderSelector::Profile& profile);
~WebrtcVideoEncoderVpx() override;
void SetTickClockForTests(base::TickClock* tick_clock);
void SetLosslessEncode(bool want_lossless);
void SetLosslessColor(bool want_lossless);
// WebrtcVideoEncoder interface.
void Encode(std::unique_ptr<webrtc::DesktopFrame> frame,
const FrameParams& params,
EncodeCallback done) override;
private:
explicit WebrtcVideoEncoderVpx(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);
// Updates codec configuration.
void UpdateConfig(const FrameParams& params);
// Prepares |image_| for encoding. Writes updated rectangles into
// |updated_region|.
void PrepareImage(const webrtc::DesktopFrame* frame,
webrtc::DesktopRegion* updated_region);
// Clears active map.
void ClearActiveMap();
// 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_;
vpx_codec_enc_cfg_t config_;
// 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_;
base::TickClock* clock_;
EncoderBitrateFilter bitrate_filter_;
DISALLOW_COPY_AND_ASSIGN(WebrtcVideoEncoderVpx);
};
} // namespace remoting
#endif // REMOTING_CODEC_WEBRTC_VIDEO_ENCODER_VPX_H_