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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.
#include "media/formats/webm/webm_colour_parser.h"
#include "base/logging.h"
#include "media/formats/webm/webm_constants.h"
namespace media {
// The definitions below are copied from the current libwebm top-of-tree.
// Chromium's third_party/libwebm doesn't have these yet. We can probably just
// include libwebm header directly in the future.
// ---- Begin copy/paste from libwebm/webm_parser/include/webm/dom_types.h ----
/**
A parsed \WebMID{MatrixCoefficients} element.
Matroska/WebM adopted these values from Table 4 of ISO/IEC 23001-8:2013/DCOR1.
See that document for further details.
*/
enum class MatrixCoefficients : std::uint64_t {
/**
The identity matrix.
Typically used for GBR (often referred to as RGB); however, may also be used
for YZX (often referred to as XYZ).
*/
kRgb = 0,
/**
Rec. ITU-R BT.709-5.
*/
kBt709 = 1,
/**
Image characteristics are unknown or are determined by the application.
*/
kUnspecified = 2,
/**
United States Federal Communications Commission Title 47 Code of Federal
Regulations (2003) 73.682 (a) (20).
*/
kFcc = 4,
/**
Rec. ITU-R BT.470‑6 System B, G (historical).
*/
kBt470Bg = 5,
/**
Society of Motion Picture and Television Engineers 170M (2004).
*/
kSmpte170M = 6,
/**
Society of Motion Picture and Television Engineers 240M (1999).
*/
kSmpte240M = 7,
/**
YCgCo.
*/
kYCgCo = 8,
/**
Rec. ITU-R BT.2020 (non-constant luminance).
*/
kBt2020NonconstantLuminance = 9,
/**
Rec. ITU-R BT.2020 (constant luminance).
*/
kBt2020ConstantLuminance = 10,
};
/**
A parsed \WebMID{Range} element.
*/
enum class Range : std::uint64_t {
/**
Unspecified.
*/
kUnspecified = 0,
/**
Broadcast range.
*/
kBroadcast = 1,
/**
Full range (no clipping).
*/
kFull = 2,
/**
Defined by MatrixCoefficients/TransferCharacteristics.
*/
kDerived = 3,
};
/**
A parsed \WebMID{TransferCharacteristics} element.
Matroska/WebM adopted these values from Table 3 of ISO/IEC 23001-8:2013/DCOR1.
See that document for further details.
*/
enum class TransferCharacteristics : std::uint64_t {
/**
Rec. ITU-R BT.709-6.
*/
kBt709 = 1,
/**
Image characteristics are unknown or are determined by the application.
*/
kUnspecified = 2,
/**
Rec. ITU‑R BT.470‑6 System M (historical) with assumed display gamma 2.2.
*/
kGamma22curve = 4,
/**
Rec. ITU‑R BT.470-6 System B, G (historical) with assumed display gamma 2.8.
*/
kGamma28curve = 5,
/**
Society of Motion Picture and Television Engineers 170M (2004).
*/
kSmpte170M = 6,
/**
Society of Motion Picture and Television Engineers 240M (1999).
*/
kSmpte240M = 7,
/**
Linear transfer characteristics.
*/
kLinear = 8,
/**
Logarithmic transfer characteristic (100:1 range).
*/
kLog = 9,
/**
Logarithmic transfer characteristic (100 * Sqrt(10) : 1 range).
*/
kLogSqrt = 10,
/**
IEC 61966-2-4.
*/
kIec6196624 = 11,
/**
Rec. ITU‑R BT.1361-0 extended colour gamut system (historical).
*/
kBt1361ExtendedColourGamut = 12,
/**
IEC 61966-2-1 sRGB or sYCC.
*/
kIec6196621 = 13,
/**
Rec. ITU-R BT.2020-2 (10-bit system).
*/
k10BitBt2020 = 14,
/**
Rec. ITU-R BT.2020-2 (12-bit system).
*/
k12BitBt2020 = 15,
/**
Society of Motion Picture and Television Engineers ST 2084.
*/
kSmpteSt2084 = 16,
/**
Society of Motion Picture and Television Engineers ST 428-1.
*/
kSmpteSt4281 = 17,
/**
Association of Radio Industries and Businesses (ARIB) STD-B67.
*/
kAribStdB67Hlg = 18,
};
/**
A parsed \WebMID{Primaries} element.
Matroska/WebM adopted these values from Table 2 of ISO/IEC 23001-8:2013/DCOR1.
See that document for further details.
*/
enum class Primaries : std::uint64_t {
/**
Rec. ITU‑R BT.709-6.
*/
kBt709 = 1,
/**
Image characteristics are unknown or are determined by the application.
*/
kUnspecified = 2,
/**
Rec. ITU‑R BT.470‑6 System M (historical).
*/
kBt470M = 4,
/**
Rec. ITU‑R BT.470‑6 System B, G (historical).
*/
kBt470Bg = 5,
/**
Society of Motion Picture and Television Engineers 170M (2004).
*/
kSmpte170M = 6,
/**
Society of Motion Picture and Television Engineers 240M (1999).
*/
kSmpte240M = 7,
/**
Generic film.
*/
kFilm = 8,
/**
Rec. ITU-R BT.2020-2.
*/
kBt2020 = 9,
/**
Society of Motion Picture and Television Engineers ST 428-1.
*/
kSmpteSt4281 = 10,
/**
JEDEC P22 phosphors/EBU Tech. 3213-E (1975).
*/
kJedecP22Phosphors = 22,
};
// ---- End copy/paste from libwebm/webm_parser/include/webm/dom_types.h ----
WebMColorMetadata::WebMColorMetadata() {}
WebMColorMetadata::WebMColorMetadata(const WebMColorMetadata& rhs) = default;
WebMMasteringMetadataParser::WebMMasteringMetadataParser() {}
WebMMasteringMetadataParser::~WebMMasteringMetadataParser() {}
bool WebMMasteringMetadataParser::OnFloat(int id, double val) {
switch (id) {
case kWebMIdPrimaryRChromaticityX:
mastering_metadata_.primary_r.set_x(val);
break;
case kWebMIdPrimaryRChromaticityY:
mastering_metadata_.primary_r.set_y(val);
break;
case kWebMIdPrimaryGChromaticityX:
mastering_metadata_.primary_g.set_x(val);
break;
case kWebMIdPrimaryGChromaticityY:
mastering_metadata_.primary_g.set_y(val);
break;
case kWebMIdPrimaryBChromaticityX:
mastering_metadata_.primary_b.set_x(val);
break;
case kWebMIdPrimaryBChromaticityY:
mastering_metadata_.primary_b.set_y(val);
break;
case kWebMIdWhitePointChromaticityX:
mastering_metadata_.white_point.set_x(val);
break;
case kWebMIdWhitePointChromaticityY:
mastering_metadata_.white_point.set_y(val);
break;
case kWebMIdLuminanceMax:
mastering_metadata_.luminance_max = val;
break;
case kWebMIdLuminanceMin:
mastering_metadata_.luminance_min = val;
break;
default:
DVLOG(1) << "Unexpected id in MasteringMetadata: 0x" << std::hex << id;
return false;
}
return true;
}
WebMColourParser::WebMColourParser() {
Reset();
}
WebMColourParser::~WebMColourParser() {}
void WebMColourParser::Reset() {
matrix_coefficients_ = -1;
bits_per_channel_ = -1;
chroma_subsampling_horz_ = -1;
chroma_subsampling_vert_ = -1;
cb_subsampling_horz_ = -1;
cb_subsampling_vert_ = -1;
chroma_siting_horz_ = -1;
chroma_siting_vert_ = -1;
range_ = -1;
transfer_characteristics_ = -1;
primaries_ = -1;
max_content_light_level_ = -1;
max_frame_average_light_level_ = -1;
}
WebMParserClient* WebMColourParser::OnListStart(int id) {
if (id == kWebMIdMasteringMetadata) {
mastering_metadata_parsed_ = false;
return &mastering_metadata_parser_;
}
return this;
}
bool WebMColourParser::OnListEnd(int id) {
if (id == kWebMIdMasteringMetadata)
mastering_metadata_parsed_ = true;
return true;
}
bool WebMColourParser::OnUInt(int id, int64_t val) {
int64_t* dst = nullptr;
switch (id) {
case kWebMIdMatrixCoefficients:
dst = &matrix_coefficients_;
break;
case kWebMIdBitsPerChannel:
dst = &bits_per_channel_;
break;
case kWebMIdChromaSubsamplingHorz:
dst = &chroma_subsampling_horz_;
break;
case kWebMIdChromaSubsamplingVert:
dst = &chroma_subsampling_vert_;
break;
case kWebMIdCbSubsamplingHorz:
dst = &cb_subsampling_horz_;
break;
case kWebMIdCbSubsamplingVert:
dst = &cb_subsampling_vert_;
break;
case kWebMIdChromaSitingHorz:
dst = &chroma_siting_horz_;
break;
case kWebMIdChromaSitingVert:
dst = &chroma_siting_vert_;
break;
case kWebMIdRange:
dst = &range_;
break;
case kWebMIdTransferCharacteristics:
dst = &transfer_characteristics_;
break;
case kWebMIdPrimaries:
dst = &primaries_;
break;
case kWebMIdMaxCLL:
dst = &max_content_light_level_;
break;
case kWebMIdMaxFALL:
dst = &max_frame_average_light_level_;
break;
default:
return true;
}
DCHECK(dst);
if (*dst != -1) {
LOG(ERROR) << "Multiple values for id " << std::hex << id << " specified ("
<< *dst << " and " << val << ")";
return false;
}
*dst = val;
return true;
}
WebMColorMetadata WebMColourParser::GetWebMColorMetadata() const {
WebMColorMetadata color_metadata;
if (bits_per_channel_ != -1)
color_metadata.BitsPerChannel = bits_per_channel_;
if (chroma_subsampling_horz_ != -1)
color_metadata.ChromaSubsamplingHorz = chroma_subsampling_horz_;
if (chroma_subsampling_vert_ != -1)
color_metadata.ChromaSubsamplingVert = chroma_subsampling_vert_;
if (cb_subsampling_horz_ != -1)
color_metadata.CbSubsamplingHorz = cb_subsampling_horz_;
if (cb_subsampling_vert_ != -1)
color_metadata.CbSubsamplingVert = cb_subsampling_vert_;
if (chroma_siting_horz_ != -1)
color_metadata.ChromaSitingHorz = chroma_siting_horz_;
if (chroma_siting_vert_ != -1)
color_metadata.ChromaSitingVert = chroma_siting_vert_;
gfx::ColorSpace::RangeID range_id = gfx::ColorSpace::RangeID::FULL;
switch (static_cast<Range>(range_)) {
case Range::kUnspecified:
range_id = gfx::ColorSpace::RangeID::FULL;
break;
case Range::kBroadcast:
range_id = gfx::ColorSpace::RangeID::LIMITED;
break;
case Range::kFull:
range_id = gfx::ColorSpace::RangeID::FULL;
break;
case Range::kDerived:
range_id = gfx::ColorSpace::RangeID::DERIVED;
break;
}
color_metadata.color_space = VideoColorSpace(
primaries_, transfer_characteristics_, matrix_coefficients_, range_id);
if (max_content_light_level_ != -1)
color_metadata.hdr_metadata.max_content_light_level =
max_content_light_level_;
if (max_frame_average_light_level_ != -1)
color_metadata.hdr_metadata.max_frame_average_light_level =
max_frame_average_light_level_;
if (mastering_metadata_parsed_)
color_metadata.hdr_metadata.mastering_metadata =
mastering_metadata_parser_.GetMasteringMetadata();
return color_metadata;
}
} // namespace media