From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- .../source/rtp_dependency_descriptor_writer.h | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_writer.h (limited to 'third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_writer.h') diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_writer.h b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_writer.h new file mode 100644 index 0000000000..568e0a8aab --- /dev/null +++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_writer.h @@ -0,0 +1,89 @@ +/* + * 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_WRITER_H_ +#define MODULES_RTP_RTCP_SOURCE_RTP_DEPENDENCY_DESCRIPTOR_WRITER_H_ + +#include +#include +#include +#include + +#include "api/array_view.h" +#include "api/transport/rtp/dependency_descriptor.h" +#include "rtc_base/bit_buffer.h" + +namespace webrtc { +class RtpDependencyDescriptorWriter { + public: + // Assumes `structure` and `descriptor` are valid and + // `descriptor` matches the `structure`. + RtpDependencyDescriptorWriter(rtc::ArrayView data, + const FrameDependencyStructure& structure, + std::bitset<32> active_chains, + const DependencyDescriptor& descriptor); + + // Serializes DependencyDescriptor rtp header extension. + // Returns false if `data` is too small to serialize the `descriptor`. + bool Write(); + + // Returns minimum number of bits needed to serialize descriptor with respect + // to the `structure`. Returns 0 if `descriptor` can't be serialized. + int ValueSizeBits() const; + + private: + // Used both as pointer to the template and as index in the templates vector. + using TemplateIterator = std::vector::const_iterator; + struct TemplateMatch { + TemplateIterator template_position; + bool need_custom_dtis; + bool need_custom_fdiffs; + bool need_custom_chains; + // Size in bits to store frame-specific details, i.e. + // excluding mandatory fields and template dependency structure. + int extra_size_bits; + }; + int StructureSizeBits() const; + TemplateMatch CalculateMatch(TemplateIterator frame_template) const; + void FindBestTemplate(); + bool ShouldWriteActiveDecodeTargetsBitmask() const; + bool HasExtendedFields() const; + uint64_t TemplateId() const; + + void WriteBits(uint64_t val, size_t bit_count); + void WriteNonSymmetric(uint32_t value, uint32_t num_values); + + // Functions to read template dependency structure. + void WriteTemplateDependencyStructure(); + void WriteTemplateLayers(); + void WriteTemplateDtis(); + void WriteTemplateFdiffs(); + void WriteTemplateChains(); + void WriteResolutions(); + + // Function to read details for the current frame. + void WriteMandatoryFields(); + void WriteExtendedFields(); + void WriteFrameDependencyDefinition(); + + void WriteFrameDtis(); + void WriteFrameFdiffs(); + void WriteFrameChains(); + + bool build_failed_ = false; + const DependencyDescriptor& descriptor_; + const FrameDependencyStructure& structure_; + std::bitset<32> active_chains_; + rtc::BitBufferWriter bit_writer_; + TemplateMatch best_template_; +}; + +} // namespace webrtc + +#endif // MODULES_RTP_RTCP_SOURCE_RTP_DEPENDENCY_DESCRIPTOR_WRITER_H_ -- cgit v1.2.3