106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef API_VIDEO_HDR_METADATA_H_
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#define API_VIDEO_HDR_METADATA_H_
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namespace webrtc {
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// SMPTE ST 2086 mastering metadata,
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// see https://ieeexplore.ieee.org/document/8353899.
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struct HdrMasteringMetadata {
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struct Chromaticity {
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Chromaticity();
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bool operator==(const Chromaticity& rhs) const {
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return x == rhs.x && y == rhs.y;
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}
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bool Validate() const {
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return x >= 0.0 && x <= 1.0 && y >= 0.0 && y <= 1.0;
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}
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// xy chromaticity coordinates must be calculated as specified in ISO
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// 11664-3:2012 Section 7, and must be specified with four decimal places.
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// The x coordinate should be in the range [0.0001, 0.7400] and the y
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// coordinate should be in the range [0.0001, 0.8400]. Valid range [0.0000,
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// 1.0000].
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float x = 0.0f;
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float y = 0.0f;
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};
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HdrMasteringMetadata();
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bool operator==(const HdrMasteringMetadata& rhs) const {
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return ((primary_r == rhs.primary_r) && (primary_g == rhs.primary_g) &&
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(primary_b == rhs.primary_b) && (white_point == rhs.white_point) &&
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(luminance_max == rhs.luminance_max) &&
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(luminance_min == rhs.luminance_min));
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}
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bool Validate() const {
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return luminance_max >= 0.0 && luminance_max <= 20000.0 &&
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luminance_min >= 0.0 && luminance_min <= 5.0 &&
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primary_r.Validate() && primary_g.Validate() &&
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primary_b.Validate() && white_point.Validate();
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}
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// The nominal primaries of the mastering display.
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Chromaticity primary_r;
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Chromaticity primary_g;
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Chromaticity primary_b;
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// The nominal chromaticity of the white point of the mastering display.
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Chromaticity white_point;
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// The nominal maximum display luminance of the mastering display. Specified
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// in the unit candela/m2. The value should be in the range [5, 10000] with
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// zero decimal places. Valid range [0, 20000].
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float luminance_max = 0.0f;
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// The nominal minimum display luminance of the mastering display. Specified
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// in the unit candela/m2. The value should be in the range [0.0001, 5.0000]
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// with four decimal places. Valid range [0.0000, 5.0000].
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float luminance_min = 0.0f;
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};
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// High dynamic range (HDR) metadata common for HDR10 and WebM/VP9-based HDR
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// formats. This struct replicates the HDRMetadata struct defined in
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// https://cs.chromium.org/chromium/src/media/base/hdr_metadata.h
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struct HdrMetadata {
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HdrMetadata();
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bool operator==(const HdrMetadata& rhs) const {
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return (
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(max_content_light_level == rhs.max_content_light_level) &&
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(max_frame_average_light_level == rhs.max_frame_average_light_level) &&
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(mastering_metadata == rhs.mastering_metadata));
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}
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bool Validate() const {
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return max_content_light_level >= 0 && max_content_light_level <= 20000 &&
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max_frame_average_light_level >= 0 &&
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max_frame_average_light_level <= 20000 &&
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mastering_metadata.Validate();
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}
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HdrMasteringMetadata mastering_metadata;
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// Max content light level (CLL), i.e. maximum brightness level present in the
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// stream, in nits. 1 nit = 1 candela/m2. Valid range [0, 20000].
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int max_content_light_level = 0;
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// Max frame-average light level (FALL), i.e. maximum average brightness of
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// the brightest frame in the stream, in nits. Valid range [0, 20000].
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int max_frame_average_light_level = 0;
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};
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} // namespace webrtc
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#endif // API_VIDEO_HDR_METADATA_H_
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