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/*
* Copyright (c) 2019 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_RTP_RTCP_SOURCE_RTP_DEPENDENCY_DESCRIPTOR_EXTENSION_H_
#define MODULES_RTP_RTCP_SOURCE_RTP_DEPENDENCY_DESCRIPTOR_EXTENSION_H_
#include <bitset>
#include <cstdint>
#include "api/array_view.h"
#include "api/transport/rtp/dependency_descriptor.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
namespace webrtc {
// Trait to read/write the dependency descriptor extension as described in
// https://aomediacodec.github.io/av1-rtp-spec/#dependency-descriptor-rtp-header-extension
// While the format is still in design, the code might change without backward
// compatibility.
class RtpDependencyDescriptorExtension {
public:
static constexpr RTPExtensionType kId = kRtpExtensionGenericFrameDescriptor02;
// TODO(bugs.webrtc.org/10342): Use uri from the spec when there is one.
static constexpr char kUri[] =
"https://aomediacodec.github.io/av1-rtp-spec/"
"#dependency-descriptor-rtp-header-extension";
static bool Parse(rtc::ArrayView<const uint8_t> data,
const FrameDependencyStructure* structure,
DependencyDescriptor* descriptor);
static size_t ValueSize(const FrameDependencyStructure& structure,
const DependencyDescriptor& descriptor) {
return ValueSize(structure, kAllChainsAreActive, descriptor);
}
static size_t ValueSize(const FrameDependencyStructure& structure,
std::bitset<32> active_chains,
const DependencyDescriptor& descriptor);
static bool Write(rtc::ArrayView<uint8_t> data,
const FrameDependencyStructure& structure,
const DependencyDescriptor& descriptor) {
return Write(data, structure, kAllChainsAreActive, descriptor);
}
static bool Write(rtc::ArrayView<uint8_t> data,
const FrameDependencyStructure& structure,
std::bitset<32> active_chains,
const DependencyDescriptor& descriptor);
private:
static constexpr std::bitset<32> kAllChainsAreActive = ~uint32_t{0};
};
} // namespace webrtc
#endif // MODULES_RTP_RTCP_SOURCE_RTP_DEPENDENCY_DESCRIPTOR_EXTENSION_H_
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