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/*
* Copyright (c) 2017 The WebRTC 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 MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_
#define MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_
#include <stddef.h>
#include <stdint.h>
#include "absl/types/optional.h"
namespace webrtc {
namespace vp9 {
// Gets the QP, QP range: [0, 255].
// Returns true on success, false otherwise.
bool GetQp(const uint8_t* buf, size_t length, int* qp);
// Bit depth per channel. Support varies by profile.
enum class BitDept : uint8_t {
k8Bit = 8,
k10Bit = 10,
k12Bit = 12,
};
enum class ColorSpace : uint8_t {
CS_UNKNOWN = 0, // Unknown (in this case the color space must be signaled
// outside the VP9 bitstream).
CS_BT_601 = 1, // CS_BT_601 Rec. ITU-R BT.601-7
CS_BT_709 = 2, // Rec. ITU-R BT.709-6
CS_SMPTE_170 = 3, // SMPTE-170
CS_SMPTE_240 = 4, // SMPTE-240
CS_BT_2020 = 5, // Rec. ITU-R BT.2020-2
CS_RESERVED = 6, // Reserved
CS_RGB = 7, // sRGB (IEC 61966-2-1)
};
enum class ColorRange {
kStudio, // Studio swing:
// For BitDepth equals 8:
// Y is between 16 and 235 inclusive.
// U and V are between 16 and 240 inclusive.
// For BitDepth equals 10:
// Y is between 64 and 940 inclusive.
// U and V are between 64 and 960 inclusive.
// For BitDepth equals 12:
// Y is between 256 and 3760.
// U and V are between 256 and 3840 inclusive.
kFull // Full swing; no restriction on Y, U, V values.
};
enum class YuvSubsampling {
k444,
k440,
k422,
k420,
};
struct FrameInfo {
int profile = 0; // Profile 0-3 are valid.
bool show_frame = false;
bool error_resilient = false;
BitDept bit_detph = BitDept::k8Bit;
ColorSpace color_space = ColorSpace::CS_UNKNOWN;
ColorRange color_range;
YuvSubsampling sub_sampling;
int frame_width = 0;
int frame_height = 0;
int render_width = 0;
int render_height = 0;
};
// Parses frame information for a VP9 key-frame or all-intra frame from a
// bitstream. Returns nullopt on failure or if not a key-frame.
absl::optional<FrameInfo> ParseIntraFrameInfo(const uint8_t* buf,
size_t length);
} // namespace vp9
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_
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