1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 #ifndef _RATE_CONTROL_H_ 19 #define _RATE_CONTROL_H_ 20 21 #include "mp4def.h" 22 23 typedef struct tagdataPointArray 24 { 25 Int Qp; 26 Int Rp; 27 float Mp; /* for MB-based RC, 3/14/01 */ 28 struct tagdataPointArray *next; 29 struct tagdataPointArray *prev; 30 } dataPointArray; 31 32 33 typedef struct 34 { 35 Int alpha; /* weight for I frame */ 36 Int Rs; /*bit rate for the sequence (or segment) e.g., 24000 bits/sec */ 37 Int Rc; /*bits used for the current frame. It is the bit count obtained after encoding. */ 38 Int Rp; /*bits to be removed from the buffer per picture. */ 39 /*? is this the average one, or just the bits coded for the previous frame */ 40 Int Rps; /*bit to be removed from buffer per src frame */ 41 float Ts; /*number of seconds for the sequence (or segment). e.g., 10 sec */ 42 float Ep; 43 float Ec; /*mean absolute difference for the current frame after motion compensation.*/ 44 /*If the macroblock is intra coded, the original spatial pixel values are summed.*/ 45 Int Qc; /*quantization level used for the current frame. */ 46 Int Nr; /*number of P frames remaining for encoding.*/ 47 Int Rr; /*number of bits remaining for encoding this sequence (or segment).*/ 48 Int Rr_Old;/* 12/24/00 */ 49 Int T; /*target bit to be used for the current frame.*/ 50 Int S; /*number of bits used for encoding the previous frame.*/ 51 Int Hc; /*header and motion vector bits used in the current frame. It includes all the information except to the residual information.*/ 52 Int Hp; /*header and motion vector bits used in the previous frame. It includes all the information except to the residual information.*/ 53 Int Ql; /*quantization level used in the previous frame */ 54 Int Bs; /*buffer size e.g., R/2 */ 55 Int B; /*current buffer level e.g., R/4 - start from the middle of the buffer */ 56 float X1; 57 float X2; 58 float X11; 59 float M; /*safe margin for the buffer */ 60 float smTick; /*ratio of src versus enc frame rate */ 61 double remnant; /*remainder frame of src/enc frame for fine frame skipping */ 62 Int timeIncRes; /* vol->timeIncrementResolution */ 63 64 dataPointArray *end; /*quantization levels for the past (20) frames */ 65 66 Int frameNumber; /* ranging from 0 to 20 nodes*/ 67 Int w; 68 Int Nr_Original; 69 Int Nr_Old, Nr_Old2; 70 Int skip_next_frame; 71 Int Qdep; /* smooth Q adjustment */ 72 Int fine_frame_skip; 73 Int VBR_Enabled; 74 Int no_frame_skip; 75 Int no_pre_skip; 76 77 Int totalFrameNumber; /* total coded frames, for debugging!!*/ 78 79 char oFirstTime; 80 81 /* BX rate control */ 82 Int TMN_W; 83 Int TMN_TH; 84 Int VBV_fullness; 85 Int max_BitVariance_num; /* the number of the maximum bit variance within the given buffer with the unit of 10% of bitrate/framerate*/ 86 Int encoded_frames; /* counter for all encoded frames */ 87 float framerate; 88 Int bitrate; 89 Int low_bound; /* bound for underflow detection, usually low_bound=-Bs/2, but could be changed in H.263 mode */ 90 Int VBV_fullness_offset; /* offset of VBV_fullness, usually is zero, but can be changed in H.263 mode*/ 91 /* End BX */ 92 93 } rateControl; 94 95 96 #endif /* _RATE_CONTROL_H_ */ 97