LCOV - code coverage report
Current view: top level - libavcodec - h263.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 12 53 22.6 %
Date: 2017-12-13 10:57:33 Functions: 2 3 66.7 %

          Line data    Source code
       1             : /*
       2             :  * H.263 internal header
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : #ifndef AVCODEC_H263_H
      21             : #define AVCODEC_H263_H
      22             : 
      23             : #include <stdint.h>
      24             : #include "libavutil/rational.h"
      25             : #include "get_bits.h"
      26             : #include "mpegvideo.h"
      27             : #include "h263data.h"
      28             : #include "rl.h"
      29             : 
      30             : #define FF_ASPECT_EXTENDED 15
      31             : #define INT_BIT (CHAR_BIT * sizeof(int))
      32             : 
      33             : // The defines below define the number of bits that are read at once for
      34             : // reading vlc values. Changing these may improve speed and data cache needs
      35             : // be aware though that decreasing them may need the number of stages that is
      36             : // passed to get_vlc* to be increased.
      37             : #define INTRA_MCBPC_VLC_BITS 6
      38             : #define INTER_MCBPC_VLC_BITS 7
      39             : #define CBPY_VLC_BITS 6
      40             : #define TEX_VLC_BITS 9
      41             : 
      42             : #define H263_GOB_HEIGHT(h) ((h) <= 400 ? 1 : (h) <= 800 ? 2 : 4)
      43             : 
      44             : extern VLC ff_h263_intra_MCBPC_vlc;
      45             : extern VLC ff_h263_inter_MCBPC_vlc;
      46             : extern VLC ff_h263_cbpy_vlc;
      47             : 
      48             : extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[];
      49             : 
      50             : 
      51             : int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code);
      52             : av_const int ff_h263_aspect_to_info(AVRational aspect);
      53             : int ff_h263_decode_init(AVCodecContext *avctx);
      54             : int ff_h263_decode_frame(AVCodecContext *avctx,
      55             :                              void *data, int *got_frame,
      56             :                              AVPacket *avpkt);
      57             : int ff_h263_decode_end(AVCodecContext *avctx);
      58             : void ff_h263_encode_mb(MpegEncContext *s,
      59             :                        int16_t block[6][64],
      60             :                        int motion_x, int motion_y);
      61             : void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number);
      62             : void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);
      63             : int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
      64             :                              int *px, int *py);
      65             : void ff_h263_encode_init(MpegEncContext *s);
      66             : void ff_h263_decode_init_vlc(void);
      67             : int ff_h263_decode_picture_header(MpegEncContext *s);
      68             : int ff_h263_decode_gob_header(MpegEncContext *s);
      69             : void ff_h263_update_motion_val(MpegEncContext * s);
      70             : void ff_h263_loop_filter(MpegEncContext * s);
      71             : int ff_h263_decode_mba(MpegEncContext *s);
      72             : void ff_h263_encode_mba(MpegEncContext *s);
      73             : void ff_init_qscale_tab(MpegEncContext *s);
      74             : int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
      75             : void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n);
      76             : 
      77             : 
      78             : /**
      79             :  * Print picture info if FF_DEBUG_PICT_INFO is set.
      80             :  */
      81             : void ff_h263_show_pict_info(MpegEncContext *s);
      82             : 
      83             : int ff_intel_h263_decode_picture_header(MpegEncContext *s);
      84             : int ff_h263_decode_mb(MpegEncContext *s,
      85             :                       int16_t block[6][64]);
      86             : 
      87             : /**
      88             :  * Return the value of the 3-bit "source format" syntax element.
      89             :  * This represents some standard picture dimensions or indicates that
      90             :  * width&height are explicitly stored later.
      91             :  */
      92             : int av_const h263_get_picture_format(int width, int height);
      93             : 
      94             : void ff_clean_h263_qscales(MpegEncContext *s);
      95             : int ff_h263_resync(MpegEncContext *s);
      96             : void ff_h263_encode_motion(PutBitContext *pb, int val, int f_code);
      97             : 
      98             : 
      99           0 : static inline int h263_get_motion_length(int val, int f_code){
     100             :     int l, bit_size, code;
     101             : 
     102           0 :     if (val == 0) {
     103           0 :         return ff_mvtab[0][1];
     104             :     } else {
     105           0 :         bit_size = f_code - 1;
     106             :         /* modulo encoding */
     107           0 :         l= INT_BIT - 6 - bit_size;
     108           0 :         val = (val<<l)>>l;
     109           0 :         val--;
     110           0 :         code = (val >> bit_size) + 1;
     111             : 
     112           0 :         return ff_mvtab[code][1] + 1 + bit_size;
     113             :     }
     114             : }
     115             : 
     116     2598845 : static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){
     117     2598845 :     if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
     118           0 :         skip_put_bits(&s->pb,
     119           0 :             h263_get_motion_length(x, f_code)
     120           0 :            +h263_get_motion_length(y, f_code));
     121             :     }else{
     122     2598845 :         ff_h263_encode_motion(&s->pb, x, f_code);
     123     2598845 :         ff_h263_encode_motion(&s->pb, y, f_code);
     124             :     }
     125     2598845 : }
     126             : 
     127     1154089 : static inline int get_p_cbp(MpegEncContext * s,
     128             :                       int16_t block[6][64],
     129             :                       int motion_x, int motion_y){
     130             :     int cbp, i;
     131             : 
     132     1154089 :     if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
     133           0 :         int best_cbpy_score= INT_MAX;
     134           0 :         int best_cbpc_score= INT_MAX;
     135           0 :         int cbpc = (-1), cbpy= (-1);
     136           0 :         const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0);
     137           0 :         const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
     138             : 
     139           0 :         for(i=0; i<4; i++){
     140           0 :             int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda;
     141           0 :             if(i&1) score += s->coded_score[5];
     142           0 :             if(i&2) score += s->coded_score[4];
     143             : 
     144           0 :             if(score < best_cbpc_score){
     145           0 :                 best_cbpc_score= score;
     146           0 :                 cbpc= i;
     147             :             }
     148             :         }
     149             : 
     150           0 :         for(i=0; i<16; i++){
     151           0 :             int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda;
     152           0 :             if(i&1) score += s->coded_score[3];
     153           0 :             if(i&2) score += s->coded_score[2];
     154           0 :             if(i&4) score += s->coded_score[1];
     155           0 :             if(i&8) score += s->coded_score[0];
     156             : 
     157           0 :             if(score < best_cbpy_score){
     158           0 :                 best_cbpy_score= score;
     159           0 :                 cbpy= i;
     160             :             }
     161             :         }
     162           0 :         cbp= cbpc + 4*cbpy;
     163           0 :         if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){
     164           0 :             if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0)
     165           0 :                 cbp= 0;
     166             :         }
     167             : 
     168           0 :         for (i = 0; i < 6; i++) {
     169           0 :             if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
     170           0 :                 s->block_last_index[i]= -1;
     171           0 :                 s->bdsp.clear_block(s->block[i]);
     172             :             }
     173             :         }
     174             :     }else{
     175     1154089 :         cbp= 0;
     176     8078623 :         for (i = 0; i < 6; i++) {
     177     6924534 :             if (s->block_last_index[i] >= 0)
     178     3085829 :                 cbp |= 1 << (5 - i);
     179             :         }
     180             :     }
     181     1154089 :     return cbp;
     182             : }
     183             : 
     184             : #endif /* AVCODEC_H263_H */

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