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Diffstat (limited to 'media/libstagefright/codecs/m4v_h263/enc/src/rate_control.h')
| -rw-r--r-- | media/libstagefright/codecs/m4v_h263/enc/src/rate_control.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/m4v_h263/enc/src/rate_control.h b/media/libstagefright/codecs/m4v_h263/enc/src/rate_control.h new file mode 100644 index 0000000..ad29549 --- /dev/null +++ b/media/libstagefright/codecs/m4v_h263/enc/src/rate_control.h @@ -0,0 +1,96 @@ +/* ------------------------------------------------------------------ + * 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_ */ |