chromium/third_party/webrtc/common_video/h264/sps_parser.cc

/*
 *  Copyright (c) 2016 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.
 */

#include "common_video/h264/sps_parser.h"

#include <cstdint>
#include <vector>

#include "common_video/h264/h264_common.h"
#include "rtc_base/bitstream_reader.h"

namespace {
constexpr int kScalingDeltaMin = …;
constexpr int kScaldingDeltaMax = …;
}  // namespace

namespace webrtc {

SpsParser::SpsState::SpsState() = default;
SpsParser::SpsState::SpsState(const SpsState&) = default;
SpsParser::SpsState::~SpsState() = default;

// General note: this is based off the 02/2014 version of the H.264 standard.
// You can find it on this page:
// http://www.itu.int/rec/T-REC-H.264

// Unpack RBSP and parse SPS state from the supplied buffer.
absl::optional<SpsParser::SpsState> SpsParser::ParseSps(
    rtc::ArrayView<const uint8_t> data) { … }

absl::optional<SpsParser::SpsState> SpsParser::ParseSpsUpToVui(
    BitstreamReader& reader) { … }

}  // namespace webrtc