1 files changed, 79 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_generic_frame_descriptor.h b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_generic_frame_descriptor.h
new file mode 100644
index 0000000000..8760acca2a
--- /dev/null
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_generic_frame_descriptor.h
@@ -0,0 +1,79 @@
+/*
+ *  Copyright (c) 2018 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_GENERIC_FRAME_DESCRIPTOR_H_
+#define MODULES_RTP_RTCP_SOURCE_RTP_GENERIC_FRAME_DESCRIPTOR_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+
+namespace webrtc {
+
+class RtpGenericFrameDescriptorExtension;
+
+// Data to put on the wire for FrameDescriptor rtp header extension.
+class RtpGenericFrameDescriptor {
+ public:
+  static constexpr int kMaxNumFrameDependencies = 8;
+  static constexpr int kMaxTemporalLayers = 8;
+  static constexpr int kMaxSpatialLayers = 8;
+
+  RtpGenericFrameDescriptor();
+  RtpGenericFrameDescriptor(const RtpGenericFrameDescriptor&);
+  ~RtpGenericFrameDescriptor();
+
+  bool FirstPacketInSubFrame() const { return beginning_of_subframe_; }
+  void SetFirstPacketInSubFrame(bool first) { beginning_of_subframe_ = first; }
+  bool LastPacketInSubFrame() const { return end_of_subframe_; }
+  void SetLastPacketInSubFrame(bool last) { end_of_subframe_ = last; }
+
+  // Properties below undefined if !FirstPacketInSubFrame()
+  // Valid range for temporal layer: [0, 7]
+  int TemporalLayer() const;
+  void SetTemporalLayer(int temporal_layer);
+
+  // Frame might by used, possible indirectly, for spatial layer sid iff
+  // (bitmask & (1 << sid)) != 0
+  int SpatialLayer() const;
+  uint8_t SpatialLayersBitmask() const;
+  void SetSpatialLayersBitmask(uint8_t spatial_layers);
+
+  int Width() const { return width_; }
+  int Height() const { return height_; }
+  void SetResolution(int width, int height);
+
+  uint16_t FrameId() const;
+  void SetFrameId(uint16_t frame_id);
+
+  rtc::ArrayView<const uint16_t> FrameDependenciesDiffs() const;
+  void ClearFrameDependencies() { num_frame_deps_ = 0; }
+  // Returns false on failure, i.e. number of dependencies is too large.
+  bool AddFrameDependencyDiff(uint16_t fdiff);
+
+ private:
+  bool beginning_of_subframe_ = false;
+  bool end_of_subframe_ = false;
+
+  uint16_t frame_id_ = 0;
+  uint8_t spatial_layers_ = 1;
+  uint8_t temporal_layer_ = 0;
+  size_t num_frame_deps_ = 0;
+  uint16_t frame_deps_id_diffs_[kMaxNumFrameDependencies];
+  int width_ = 0;
+  int height_ = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_RTP_RTCP_SOURCE_RTP_GENERIC_FRAME_DESCRIPTOR_H_