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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 MEDIA_FORMATS_WEBM_WEBM_COLOUR_PARSER_H_
#define MEDIA_FORMATS_WEBM_WEBM_COLOUR_PARSER_H_
#include "base/macros.h"
#include "base/optional.h"
#include "media/base/hdr_metadata.h"
#include "media/base/video_color_space.h"
#include "media/formats/webm/webm_parser.h"
namespace media {
// WebM color information, containing HDR metadata:
// http://www.webmproject.org/docs/container/#Colour
struct MEDIA_EXPORT WebMColorMetadata {
unsigned BitsPerChannel = 0;
unsigned ChromaSubsamplingHorz = 0;
unsigned ChromaSubsamplingVert = 0;
unsigned CbSubsamplingHorz = 0;
unsigned CbSubsamplingVert = 0;
unsigned ChromaSitingHorz = 0;
unsigned ChromaSitingVert = 0;
VideoColorSpace color_space;
base::Optional<HDRMetadata> hdr_metadata;
WebMColorMetadata();
WebMColorMetadata(const WebMColorMetadata& rhs);
};
// Parser for WebM MasteringMetadata within Colour element:
// http://www.webmproject.org/docs/container/#MasteringMetadata
class WebMMasteringMetadataParser : public WebMParserClient {
public:
WebMMasteringMetadataParser();
~WebMMasteringMetadataParser() override;
MasteringMetadata GetMasteringMetadata() const { return mastering_metadata_; }
private:
// WebMParserClient implementation.
bool OnFloat(int id, double val) override;
MasteringMetadata mastering_metadata_;
DISALLOW_COPY_AND_ASSIGN(WebMMasteringMetadataParser);
};
// Parser for WebM Colour element:
// http://www.webmproject.org/docs/container/#colour
class WebMColourParser : public WebMParserClient {
public:
WebMColourParser();
~WebMColourParser() override;
void Reset();
WebMColorMetadata GetWebMColorMetadata() const;
private:
// WebMParserClient implementation.
WebMParserClient* OnListStart(int id) override;
bool OnListEnd(int id) override;
bool OnUInt(int id, int64_t val) override;
int64_t matrix_coefficients_;
int64_t bits_per_channel_;
int64_t chroma_subsampling_horz_;
int64_t chroma_subsampling_vert_;
int64_t cb_subsampling_horz_;
int64_t cb_subsampling_vert_;
int64_t chroma_siting_horz_;
int64_t chroma_siting_vert_;
int64_t range_;
int64_t transfer_characteristics_;
int64_t primaries_;
int64_t max_content_light_level_;
int64_t max_frame_average_light_level_;
WebMMasteringMetadataParser mastering_metadata_parser_;
bool mastering_metadata_parsed_ = false;
DISALLOW_COPY_AND_ASSIGN(WebMColourParser);
};
} // namespace media
#endif // MEDIA_FORMATS_WEBM_WEBM_COLOUR_PARSER_H_
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