| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| #ifndef _RATE_CONTROL_H_ |
| #define _RATE_CONTROL_H_ |
| |
| #include "mp4def.h" |
| |
| typedef struct tagdataPointArray |
| { |
| Int Qp; |
| Int Rp; |
| float Mp; /* for MB-based RC, 3/14/01 */ |
| struct tagdataPointArray *next; |
| struct tagdataPointArray *prev; |
| } dataPointArray; |
| |
| |
| typedef struct |
| { |
| Int alpha; /* weight for I frame */ |
| Int Rs; /*bit rate for the sequence (or segment) e.g., 24000 bits/sec */ |
| Int Rc; /*bits used for the current frame. It is the bit count obtained after encoding. */ |
| Int Rp; /*bits to be removed from the buffer per picture. */ |
| /*? is this the average one, or just the bits coded for the previous frame */ |
| Int Rps; /*bit to be removed from buffer per src frame */ |
| float Ts; /*number of seconds for the sequence (or segment). e.g., 10 sec */ |
| float Ep; |
| float Ec; /*mean absolute difference for the current frame after motion compensation.*/ |
| /*If the macroblock is intra coded, the original spatial pixel values are summed.*/ |
| Int Qc; /*quantization level used for the current frame. */ |
| Int Nr; /*number of P frames remaining for encoding.*/ |
| Int Rr; /*number of bits remaining for encoding this sequence (or segment).*/ |
| Int Rr_Old;/* 12/24/00 */ |
| Int T; /*target bit to be used for the current frame.*/ |
| Int S; /*number of bits used for encoding the previous frame.*/ |
| Int Hc; /*header and motion vector bits used in the current frame. It includes all the information except to the residual information.*/ |
| Int Hp; /*header and motion vector bits used in the previous frame. It includes all the information except to the residual information.*/ |
| Int Ql; /*quantization level used in the previous frame */ |
| Int Bs; /*buffer size e.g., R/2 */ |
| Int B; /*current buffer level e.g., R/4 - start from the middle of the buffer */ |
| float X1; |
| float X2; |
| float X11; |
| float M; /*safe margin for the buffer */ |
| float smTick; /*ratio of src versus enc frame rate */ |
| double remnant; /*remainder frame of src/enc frame for fine frame skipping */ |
| Int timeIncRes; /* vol->timeIncrementResolution */ |
| |
| dataPointArray *end; /*quantization levels for the past (20) frames */ |
| |
| Int frameNumber; /* ranging from 0 to 20 nodes*/ |
| Int w; |
| Int Nr_Original; |
| Int Nr_Old, Nr_Old2; |
| Int skip_next_frame; |
| Int Qdep; /* smooth Q adjustment */ |
| Int fine_frame_skip; |
| Int VBR_Enabled; |
| Int no_frame_skip; |
| Int no_pre_skip; |
| |
| Int totalFrameNumber; /* total coded frames, for debugging!!*/ |
| |
| char oFirstTime; |
| |
| /* BX rate control */ |
| Int TMN_W; |
| Int TMN_TH; |
| Int VBV_fullness; |
| Int max_BitVariance_num; /* the number of the maximum bit variance within the given buffer with the unit of 10% of bitrate/framerate*/ |
| Int encoded_frames; /* counter for all encoded frames */ |
| float framerate; |
| Int bitrate; |
| Int low_bound; /* bound for underflow detection, usually low_bound=-Bs/2, but could be changed in H.263 mode */ |
| Int VBV_fullness_offset; /* offset of VBV_fullness, usually is zero, but can be changed in H.263 mode*/ |
| /* End BX */ |
| |
| } rateControl; |
| |
| |
| #endif /* _RATE_CONTROL_H_ */ |