Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 89 insertions, 0 deletions

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 <bitset>
+#include <cstddef>
+#include <cstdint>
+#include <vector>
+
+#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<uint8_t> 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<FrameDependencyTemplate>::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_