shithub: libvpx

ref: 7c5574a635fccf8bde063426ff2b167dc91bfb8a
dir: /third_party/libwebm/common/hdr_util.h/

// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS.  All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
#ifndef LIBWEBM_COMMON_HDR_UTIL_H_
#define LIBWEBM_COMMON_HDR_UTIL_H_

#include <stdint.h>

#include <memory>

#include "mkvmuxer/mkvmuxer.h"

namespace mkvparser {
struct Colour;
struct MasteringMetadata;
struct PrimaryChromaticity;
}  // namespace mkvparser

namespace libwebm {
// Utility types and functions for working with the Colour element and its
// children. Copiers return true upon success. Presence functions return true
// when the specified element is present.

// TODO(tomfinegan): These should be moved to libwebm_utils once c++11 is
// required by libwebm.

// Features of the VP9 codec that may be set in the CodecPrivate of a VP9 video
// stream. A value of kValueNotPresent represents that the value was not set in
// the CodecPrivate.
struct Vp9CodecFeatures {
  static const int kValueNotPresent;

  Vp9CodecFeatures()
      : profile(kValueNotPresent),
        level(kValueNotPresent),
        bit_depth(kValueNotPresent),
        chroma_subsampling(kValueNotPresent) {}
  ~Vp9CodecFeatures() {}

  int profile;
  int level;
  int bit_depth;
  int chroma_subsampling;
};

typedef std::unique_ptr<mkvmuxer::PrimaryChromaticity> PrimaryChromaticityPtr;

bool CopyPrimaryChromaticity(const mkvparser::PrimaryChromaticity& parser_pc,
                             PrimaryChromaticityPtr* muxer_pc);

bool MasteringMetadataValuePresent(double value);

bool CopyMasteringMetadata(const mkvparser::MasteringMetadata& parser_mm,
                           mkvmuxer::MasteringMetadata* muxer_mm);

bool ColourValuePresent(long long value);

bool CopyColour(const mkvparser::Colour& parser_colour,
                mkvmuxer::Colour* muxer_colour);

// Returns true if |features| is set to one or more valid values.
bool ParseVpxCodecPrivate(const uint8_t* private_data, int32_t length,
                          Vp9CodecFeatures* features);

}  // namespace libwebm

#endif  // LIBWEBM_COMMON_HDR_UTIL_H_