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 #ifndef WEBRTC_MODULES_VIDEO_CODING_JITTER_BUFFER_COMMON_H_ 12 #define WEBRTC_MODULES_VIDEO_CODING_JITTER_BUFFER_COMMON_H_ 13 14 #include "webrtc/typedefs.h" 15 16 namespace webrtc { 17 18 // Used to estimate rolling average of packets per frame. 19 static const float kFastConvergeMultiplier = 0.4f; 20 static const float kNormalConvergeMultiplier = 0.2f; 21 22 enum { kMaxNumberOfFrames = 300 }; 23 enum { kStartNumberOfFrames = 6 }; 24 enum { kMaxVideoDelayMs = 10000 }; 25 enum { kPacketsPerFrameMultiplier = 5 }; 26 enum { kFastConvergeThreshold = 5 }; 27 28 enum VCMJitterBufferEnum { 29 kMaxConsecutiveOldFrames = 60, 30 kMaxConsecutiveOldPackets = 300, 31 // TODO(sprang): Reduce this limit once codecs don't sometimes wildly 32 // overshoot bitrate target. 33 kMaxPacketsInSession = 1400, // Allows ~2MB frames. 34 kBufferIncStepSizeBytes = 30000, // >20 packets. 35 kMaxJBFrameSizeBytes = 4000000 // sanity don't go above 4Mbyte. 36 }; 37 38 enum VCMFrameBufferEnum { 39 kOutOfBoundsPacket = -7, 40 kNotInitialized = -6, 41 kOldPacket = -5, 42 kGeneralError = -4, 43 kFlushIndicator = -3, // Indicator that a flush has occurred. 44 kTimeStampError = -2, 45 kSizeError = -1, 46 kNoError = 0, 47 kIncomplete = 1, // Frame incomplete. 48 kCompleteSession = 3, // at least one layer in the frame complete. 49 kDecodableSession = 4, // Frame incomplete, but ready to be decoded 50 kDuplicatePacket = 5 // We're receiving a duplicate packet. 51 }; 52 53 enum VCMFrameBufferStateEnum { 54 kStateEmpty, // frame popped by the RTP receiver 55 kStateIncomplete, // frame that have one or more packet(s) stored 56 kStateComplete, // frame that have all packets 57 kStateDecodable // Hybrid mode - frame can be decoded 58 }; 59 60 enum { kH264StartCodeLengthBytes = 4 }; 61 62 // Used to indicate if a received packet contain a complete NALU (or equivalent) 63 enum VCMNaluCompleteness { 64 kNaluUnset = 0, // Packet has not been filled. 65 kNaluComplete = 1, // Packet can be decoded as is. 66 kNaluStart, // Packet contain beginning of NALU 67 kNaluIncomplete, // Packet is not beginning or end of NALU 68 kNaluEnd, // Packet is the end of a NALU 69 }; 70 } // namespace webrtc 71 72 #endif // WEBRTC_MODULES_VIDEO_CODING_JITTER_BUFFER_COMMON_H_ 73