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Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/modules/video_coding/rtp_frame_reference_finder.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/video_coding/rtp_frame_reference_finder.h b/third_party/libwebrtc/modules/video_coding/rtp_frame_reference_finder.h new file mode 100644 index 0000000000..6050513179 --- /dev/null +++ b/third_party/libwebrtc/modules/video_coding/rtp_frame_reference_finder.h @@ -0,0 +1,60 @@ +/* + * 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. + */ + +#ifndef MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_ +#define MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_ + +#include <memory> + +#include "modules/rtp_rtcp/source/frame_object.h" + +namespace webrtc { +namespace internal { +class RtpFrameReferenceFinderImpl; +} // namespace internal + +class RtpFrameReferenceFinder { + public: + using ReturnVector = absl::InlinedVector<std::unique_ptr<RtpFrameObject>, 3>; + + RtpFrameReferenceFinder(); + explicit RtpFrameReferenceFinder(int64_t picture_id_offset); + ~RtpFrameReferenceFinder(); + + // The RtpFrameReferenceFinder will hold onto the frame until: + // - the required information to determine its references has been received, + // in which case it (and possibly other) frames are returned, or + // - There are too many stashed frames (determined by `kMaxStashedFrames`), + // in which case it gets dropped, or + // - It gets cleared by ClearTo, in which case its dropped. + // - The frame is old, in which case it also gets dropped. + ReturnVector ManageFrame(std::unique_ptr<RtpFrameObject> frame); + + // Notifies that padding has been received, which the reference finder + // might need to calculate the references of a frame. + ReturnVector PaddingReceived(uint16_t seq_num); + + // Clear all stashed frames that include packets older than `seq_num`. + void ClearTo(uint16_t seq_num); + + private: + void AddPictureIdOffset(ReturnVector& frames); + + // How far frames have been cleared out of the buffer by RTP sequence number. + // A frame will be cleared if it contains a packet with a sequence number + // older than `cleared_to_seq_num_`. + int cleared_to_seq_num_ = -1; + const int64_t picture_id_offset_; + std::unique_ptr<internal::RtpFrameReferenceFinderImpl> impl_; +}; + +} // namespace webrtc + +#endif // MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_ |