yading@10: /*
yading@10:  * H263 internal header
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: #ifndef AVCODEC_H263_H
yading@10: #define AVCODEC_H263_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: #include "libavutil/rational.h"
yading@10: #include "get_bits.h"
yading@10: #include "mpegvideo.h"
yading@10: #include "rl.h"
yading@10: 
yading@10: // The defines below define the number of bits that are read at once for
yading@10: // reading vlc values. Changing these may improve speed and data cache needs
yading@10: // be aware though that decreasing them may need the number of stages that is
yading@10: // passed to get_vlc* to be increased.
yading@10: #define INTRA_MCBPC_VLC_BITS 6
yading@10: #define INTER_MCBPC_VLC_BITS 7
yading@10: #define CBPY_VLC_BITS 6
yading@10: #define TEX_VLC_BITS 9
yading@10: 
yading@10: extern const AVRational ff_h263_pixel_aspect[16];
yading@10: extern const uint8_t ff_h263_cbpy_tab[16][2];
yading@10: 
yading@10: extern const uint8_t ff_cbpc_b_tab[4][2];
yading@10: 
yading@10: extern const uint8_t ff_mvtab[33][2];
yading@10: 
yading@10: extern const uint8_t ff_h263_intra_MCBPC_code[9];
yading@10: extern const uint8_t ff_h263_intra_MCBPC_bits[9];
yading@10: 
yading@10: extern const uint8_t ff_h263_inter_MCBPC_code[28];
yading@10: extern const uint8_t ff_h263_inter_MCBPC_bits[28];
yading@10: extern const uint8_t ff_h263_mbtype_b_tab[15][2];
yading@10: 
yading@10: extern VLC ff_h263_intra_MCBPC_vlc;
yading@10: extern VLC ff_h263_inter_MCBPC_vlc;
yading@10: extern VLC ff_h263_cbpy_vlc;
yading@10: 
yading@10: extern RLTable ff_h263_rl_inter;
yading@10: 
yading@10: extern RLTable ff_rl_intra_aic;
yading@10: 
yading@10: extern const uint16_t ff_h263_format[8][2];
yading@10: extern const uint8_t ff_modified_quant_tab[2][32];
yading@10: extern const uint16_t ff_mba_max[6];
yading@10: extern const uint8_t ff_mba_length[7];
yading@10: 
yading@10: extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
yading@10: 
yading@10: extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[];
yading@10: 
yading@10: 
yading@10: int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code);
yading@10: av_const int ff_h263_aspect_to_info(AVRational aspect);
yading@10: int ff_h263_decode_init(AVCodecContext *avctx);
yading@10: int ff_h263_decode_frame(AVCodecContext *avctx,
yading@10:                              void *data, int *got_frame,
yading@10:                              AVPacket *avpkt);
yading@10: int ff_h263_decode_end(AVCodecContext *avctx);
yading@10: void ff_h263_encode_mb(MpegEncContext *s,
yading@10:                        int16_t block[6][64],
yading@10:                        int motion_x, int motion_y);
yading@10: void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number);
yading@10: void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);
yading@10: int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
yading@10:                              int *px, int *py);
yading@10: void ff_h263_encode_init(MpegEncContext *s);
yading@10: void ff_h263_decode_init_vlc(void);
yading@10: int ff_h263_decode_picture_header(MpegEncContext *s);
yading@10: int ff_h263_decode_gob_header(MpegEncContext *s);
yading@10: void ff_h263_update_motion_val(MpegEncContext * s);
yading@10: void ff_h263_loop_filter(MpegEncContext * s);
yading@10: int ff_h263_decode_mba(MpegEncContext *s);
yading@10: void ff_h263_encode_mba(MpegEncContext *s);
yading@10: void ff_init_qscale_tab(MpegEncContext *s);
yading@10: int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
yading@10: void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n);
yading@10: 
yading@10: 
yading@10: /**
yading@10:  * Print picture info if FF_DEBUG_PICT_INFO is set.
yading@10:  */
yading@10: void ff_h263_show_pict_info(MpegEncContext *s);
yading@10: 
yading@10: int ff_intel_h263_decode_picture_header(MpegEncContext *s);
yading@10: int ff_h263_decode_mb(MpegEncContext *s,
yading@10:                       int16_t block[6][64]);
yading@10: 
yading@10: /**
yading@10:  * Return the value of the 3bit "source format" syntax element.
yading@10:  * This represents some standard picture dimensions or indicates that
yading@10:  * width&height are explicitly stored later.
yading@10:  */
yading@10: int av_const h263_get_picture_format(int width, int height);
yading@10: 
yading@10: void ff_clean_h263_qscales(MpegEncContext *s);
yading@10: int ff_h263_resync(MpegEncContext *s);
yading@10: const uint8_t *ff_h263_find_resync_marker(MpegEncContext *s, const uint8_t *p, const uint8_t *end);
yading@10: int ff_h263_get_gob_height(MpegEncContext *s);
yading@10: void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
yading@10: 
yading@10: 
yading@10: static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){
yading@10:     int l, bit_size, code;
yading@10: 
yading@10:     if (val == 0) {
yading@10:         return ff_mvtab[0][1];
yading@10:     } else {
yading@10:         bit_size = f_code - 1;
yading@10:         /* modulo encoding */
yading@10:         l= INT_BIT - 6 - bit_size;
yading@10:         val = (val<<l)>>l;
yading@10:         val--;
yading@10:         code = (val >> bit_size) + 1;
yading@10: 
yading@10:         return ff_mvtab[code][1] + 1 + bit_size;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){
yading@10:     if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
yading@10:         skip_put_bits(&s->pb,
yading@10:             h263_get_motion_length(s, x, f_code)
yading@10:            +h263_get_motion_length(s, y, f_code));
yading@10:     }else{
yading@10:         ff_h263_encode_motion(s, x, f_code);
yading@10:         ff_h263_encode_motion(s, y, f_code);
yading@10:     }
yading@10: }
yading@10: 
yading@10: static inline int get_p_cbp(MpegEncContext * s,
yading@10:                       int16_t block[6][64],
yading@10:                       int motion_x, int motion_y){
yading@10:     int cbp, i;
yading@10: 
yading@10:     if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
yading@10:         int best_cbpy_score= INT_MAX;
yading@10:         int best_cbpc_score= INT_MAX;
yading@10:         int cbpc = (-1), cbpy= (-1);
yading@10:         const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0);
yading@10:         const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
yading@10: 
yading@10:         for(i=0; i<4; i++){
yading@10:             int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda;
yading@10:             if(i&1) score += s->coded_score[5];
yading@10:             if(i&2) score += s->coded_score[4];
yading@10: 
yading@10:             if(score < best_cbpc_score){
yading@10:                 best_cbpc_score= score;
yading@10:                 cbpc= i;
yading@10:             }
yading@10:         }
yading@10: 
yading@10:         for(i=0; i<16; i++){
yading@10:             int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda;
yading@10:             if(i&1) score += s->coded_score[3];
yading@10:             if(i&2) score += s->coded_score[2];
yading@10:             if(i&4) score += s->coded_score[1];
yading@10:             if(i&8) score += s->coded_score[0];
yading@10: 
yading@10:             if(score < best_cbpy_score){
yading@10:                 best_cbpy_score= score;
yading@10:                 cbpy= i;
yading@10:             }
yading@10:         }
yading@10:         cbp= cbpc + 4*cbpy;
yading@10:         if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){
yading@10:             if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0)
yading@10:                 cbp= 0;
yading@10:         }
yading@10: 
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
yading@10:                 s->block_last_index[i]= -1;
yading@10:                 s->dsp.clear_block(s->block[i]);
yading@10:             }
yading@10:         }
yading@10:     }else{
yading@10:         cbp= 0;
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             if (s->block_last_index[i] >= 0)
yading@10:                 cbp |= 1 << (5 - i);
yading@10:         }
yading@10:     }
yading@10:     return cbp;
yading@10: }
yading@10: 
yading@10: static inline void memsetw(short *tab, int val, int n)
yading@10: {
yading@10:     int i;
yading@10:     for(i=0;i<n;i++)
yading@10:         tab[i] = val;
yading@10: }
yading@10: 
yading@10: #endif /* AVCODEC_H263_H */