FFmpeg: libavcodec/rv34.h Source File

00001 /*
00002  * RV30/40 decoder common data declarations
00003  * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00027 #ifndef AVCODEC_RV34_H
00028 #define AVCODEC_RV34_H
00029 
00030 #include "avcodec.h"
00031 #include "dsputil.h"
00032 #include "mpegvideo.h"
00033 
00034 #include "h264pred.h"
00035 
00036 #define MB_TYPE_SEPARATE_DC 0x01000000
00037 #define IS_SEPARATE_DC(a)   ((a) & MB_TYPE_SEPARATE_DC)
00038 
00042 enum RV40BlockTypes{
00043     RV34_MB_TYPE_INTRA,      
00044     RV34_MB_TYPE_INTRA16x16, 
00045     RV34_MB_P_16x16,         
00046     RV34_MB_P_8x8,           
00047     RV34_MB_B_FORWARD,       
00048     RV34_MB_B_BACKWARD,      
00049     RV34_MB_SKIP,            
00050     RV34_MB_B_DIRECT,        
00051     RV34_MB_P_16x8,          
00052     RV34_MB_P_8x16,          
00053     RV34_MB_B_BIDIR,         
00054     RV34_MB_P_MIX16x16,      
00055     RV34_MB_TYPES
00056 };
00057 
00063 typedef struct RV34VLC{
00064     VLC cbppattern[2];     
00065     VLC cbp[2][4];         
00066     VLC first_pattern[4];  
00067     VLC second_pattern[2]; 
00068     VLC third_pattern[2];  
00069     VLC coefficient;       
00070 }RV34VLC;
00071 
00073 typedef struct SliceInfo{
00074     int type;              
00075     int quant;             
00076     int vlc_set;           
00077     int start, end;        
00078     int width;             
00079     int height;            
00080     int pts;               
00081 }SliceInfo;
00082 
00084 typedef struct RV34DecContext{
00085     MpegEncContext s;
00086     int8_t *intra_types_hist;
00087     int8_t *intra_types;     
00088     const uint8_t *luma_dc_quant_i;
00089     const uint8_t *luma_dc_quant_p;
00090 
00091     RV34VLC *cur_vlcs;       
00092     int bits;                
00093     H264PredContext h;       
00094     SliceInfo si;            
00095 
00096     int *mb_type;            
00097     int block_type;          
00098     int luma_vlc;            
00099     int chroma_vlc;          
00100     int is16;                
00101     int dmv[4][2];           
00102 
00103     int rv30;                
00104     int rpr;                 
00105 
00106     int cur_pts, last_pts, next_pts;
00107 
00108     uint16_t *cbp_luma;      
00109     uint8_t  *cbp_chroma;    
00110     int      *deblock_coefs; 
00111 
00113     DECLARE_ALIGNED_8(uint32_t, avail_cache[3*4]);
00114 
00115     int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
00116     int (*decode_mb_info)(struct RV34DecContext *r);
00117     int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
00118     void (*loop_filter)(struct RV34DecContext *r, int row);
00119 }RV34DecContext;
00120 
00124 int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
00125 int ff_rv34_decode_init(AVCodecContext *avctx);
00126 int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size);
00127 int ff_rv34_decode_end(AVCodecContext *avctx);
00128 
00129 #endif /* AVCODEC_RV34_H */