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| 1 /* | |
| 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 /* | |
| 12 * This file defines classes for doing reference picture selection, primarily | |
| 13 * with VP8. | |
| 14 */ | |
| 15 | |
| 16 #ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_REFERENCE_PICTURE_SELECTION_H_ | |
| 17 #define WEBRTC_MODULES_VIDEO_CODING_CODECS_REFERENCE_PICTURE_SELECTION_H_ | |
| 18 | |
| 19 #include "webrtc/typedefs.h" | |
| 20 | |
| 21 namespace webrtc { | |
| 22 | |
| 23 class ReferencePictureSelection { | |
| 24 public: | |
| 25 ReferencePictureSelection(); | |
| 26 void Init(); | |
| 27 | |
| 28 // Report a received reference picture selection indication. This will | |
| 29 // introduce a new established reference if the received RPSI isn't too late. | |
| 30 void ReceivedRPSI(int rpsi_picture_id); | |
| 31 | |
| 32 // Report a received slice loss indication. Returns true if a refresh frame | |
| 33 // must be sent to the receiver, which is accomplished by only predicting | |
| 34 // from the established reference. | |
| 35 // |now_ts| is the RTP timestamp corresponding to the current time. Typically | |
| 36 // the capture timestamp of the frame currently being processed. | |
| 37 // Returns true if it's time to encode a decoder refresh, otherwise false. | |
| 38 bool ReceivedSLI(uint32_t now_ts); | |
| 39 | |
| 40 // Returns the recommended VP8 encode flags needed. May refresh the decoder | |
| 41 // and/or update the reference buffers. | |
| 42 // |picture_id| picture id of the frame to be encoded. | |
| 43 // |send_refresh| should be set to true if a decoder refresh should be | |
| 44 // encoded, otherwise false. | |
| 45 // |now_ts| is the RTP timestamp corresponding to the current time. Typically | |
| 46 // the capture timestamp of the frame currently being processed. | |
| 47 // Returns the flags to be given to the libvpx encoder when encoding the next | |
| 48 // frame. | |
| 49 int EncodeFlags(int picture_id, bool send_refresh, uint32_t now_ts); | |
| 50 | |
| 51 // Notify the RPS that the frame with picture id |picture_id| was encoded as | |
| 52 // a key frame, effectively updating all reference buffers. | |
| 53 void EncodedKeyFrame(int picture_id); | |
| 54 | |
| 55 // Set the round-trip time between the sender and the receiver to |rtt| | |
| 56 // milliseconds. | |
| 57 void SetRtt(int64_t rtt); | |
| 58 | |
| 59 private: | |
| 60 static int64_t TimestampDiff(uint32_t new_ts, uint32_t old_ts); | |
| 61 | |
| 62 const double kRttConfidence; | |
| 63 | |
| 64 bool update_golden_next_; | |
| 65 bool established_golden_; | |
| 66 bool received_ack_; | |
| 67 int last_sent_ref_picture_id_; | |
| 68 uint32_t last_sent_ref_update_time_; | |
| 69 int established_ref_picture_id_; | |
| 70 uint32_t last_refresh_time_; | |
| 71 int64_t rtt_; | |
| 72 }; | |
| 73 | |
| 74 } // namespace webrtc | |
| 75 | |
| 76 #endif // WEBRTC_MODULES_VIDEO_CODING_CODECS_REFERENCE_PICTURE_SELECTION_H_ | |
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Chromium Code Reviews
Issue 2753783002:
Delete VP8 feedback mode. (Closed)
