| 1 | /* |
| 2 | * H263 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 "rl.h" |
| 28 | |
| 29 | #if !FF_API_ASPECT_EXTENDED |
| 30 | #define FF_ASPECT_EXTENDED 15 |
| 31 | #endif |
| 32 | #define INT_BIT (CHAR_BIT * sizeof(int)) |
| 33 | |
| 34 | // The defines below define the number of bits that are read at once for |
| 35 | // reading vlc values. Changing these may improve speed and data cache needs |
| 36 | // be aware though that decreasing them may need the number of stages that is |
| 37 | // passed to get_vlc* to be increased. |
| 38 | #define INTRA_MCBPC_VLC_BITS 6 |
| 39 | #define INTER_MCBPC_VLC_BITS 7 |
| 40 | #define CBPY_VLC_BITS 6 |
| 41 | #define TEX_VLC_BITS 9 |
| 42 | |
| 43 | extern const AVRational ff_h263_pixel_aspect[16]; |
| 44 | extern const uint8_t ff_h263_cbpy_tab[16][2]; |
| 45 | |
| 46 | extern const uint8_t ff_cbpc_b_tab[4][2]; |
| 47 | |
| 48 | extern const uint8_t ff_mvtab[33][2]; |
| 49 | |
| 50 | extern const uint8_t ff_h263_intra_MCBPC_code[9]; |
| 51 | extern const uint8_t ff_h263_intra_MCBPC_bits[9]; |
| 52 | |
| 53 | extern const uint8_t ff_h263_inter_MCBPC_code[28]; |
| 54 | extern const uint8_t ff_h263_inter_MCBPC_bits[28]; |
| 55 | extern const uint8_t ff_h263_mbtype_b_tab[15][2]; |
| 56 | |
| 57 | extern VLC ff_h263_intra_MCBPC_vlc; |
| 58 | extern VLC ff_h263_inter_MCBPC_vlc; |
| 59 | extern VLC ff_h263_cbpy_vlc; |
| 60 | |
| 61 | extern const uint16_t ff_inter_vlc[103][2]; |
| 62 | extern const int8_t ff_inter_level[102]; |
| 63 | extern const int8_t ff_inter_run[102]; |
| 64 | |
| 65 | extern RLTable ff_h263_rl_inter; |
| 66 | |
| 67 | extern RLTable ff_rl_intra_aic; |
| 68 | |
| 69 | extern const uint16_t ff_h263_format[8][2]; |
| 70 | extern const uint8_t ff_modified_quant_tab[2][32]; |
| 71 | extern const uint16_t ff_mba_max[6]; |
| 72 | extern const uint8_t ff_mba_length[7]; |
| 73 | |
| 74 | extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
| 75 | |
| 76 | extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[]; |
| 77 | |
| 78 | |
| 79 | int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code); |
| 80 | av_const int ff_h263_aspect_to_info(AVRational aspect); |
| 81 | int ff_h263_decode_init(AVCodecContext *avctx); |
| 82 | int ff_h263_decode_frame(AVCodecContext *avctx, |
| 83 | void *data, int *got_frame, |
| 84 | AVPacket *avpkt); |
| 85 | int ff_h263_decode_end(AVCodecContext *avctx); |
| 86 | void ff_h263_encode_mb(MpegEncContext *s, |
| 87 | int16_t block[6][64], |
| 88 | int motion_x, int motion_y); |
| 89 | void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number); |
| 90 | void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line); |
| 91 | int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir, |
| 92 | int *px, int *py); |
| 93 | void ff_h263_encode_init(MpegEncContext *s); |
| 94 | void ff_h263_decode_init_vlc(void); |
| 95 | int ff_h263_decode_picture_header(MpegEncContext *s); |
| 96 | int ff_h263_decode_gob_header(MpegEncContext *s); |
| 97 | void ff_h263_update_motion_val(MpegEncContext * s); |
| 98 | void ff_h263_loop_filter(MpegEncContext * s); |
| 99 | int ff_h263_decode_mba(MpegEncContext *s); |
| 100 | void ff_h263_encode_mba(MpegEncContext *s); |
| 101 | void ff_init_qscale_tab(MpegEncContext *s); |
| 102 | int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr); |
| 103 | void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n); |
| 104 | |
| 105 | |
| 106 | /** |
| 107 | * Print picture info if FF_DEBUG_PICT_INFO is set. |
| 108 | */ |
| 109 | void ff_h263_show_pict_info(MpegEncContext *s); |
| 110 | |
| 111 | int ff_intel_h263_decode_picture_header(MpegEncContext *s); |
| 112 | int ff_h263_decode_mb(MpegEncContext *s, |
| 113 | int16_t block[6][64]); |
| 114 | |
| 115 | /** |
| 116 | * Return the value of the 3bit "source format" syntax element. |
| 117 | * This represents some standard picture dimensions or indicates that |
| 118 | * width&height are explicitly stored later. |
| 119 | */ |
| 120 | int av_const h263_get_picture_format(int width, int height); |
| 121 | |
| 122 | void ff_clean_h263_qscales(MpegEncContext *s); |
| 123 | int ff_h263_resync(MpegEncContext *s); |
| 124 | int ff_h263_get_gob_height(MpegEncContext *s); |
| 125 | void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code); |
| 126 | |
| 127 | |
| 128 | static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){ |
| 129 | int l, bit_size, code; |
| 130 | |
| 131 | if (val == 0) { |
| 132 | return ff_mvtab[0][1]; |
| 133 | } else { |
| 134 | bit_size = f_code - 1; |
| 135 | /* modulo encoding */ |
| 136 | l= INT_BIT - 6 - bit_size; |
| 137 | val = (val<<l)>>l; |
| 138 | val--; |
| 139 | code = (val >> bit_size) + 1; |
| 140 | |
| 141 | return ff_mvtab[code][1] + 1 + bit_size; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){ |
| 146 | if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ |
| 147 | skip_put_bits(&s->pb, |
| 148 | h263_get_motion_length(s, x, f_code) |
| 149 | +h263_get_motion_length(s, y, f_code)); |
| 150 | }else{ |
| 151 | ff_h263_encode_motion(s, x, f_code); |
| 152 | ff_h263_encode_motion(s, y, f_code); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | static inline int get_p_cbp(MpegEncContext * s, |
| 157 | int16_t block[6][64], |
| 158 | int motion_x, int motion_y){ |
| 159 | int cbp, i; |
| 160 | |
| 161 | if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { |
| 162 | int best_cbpy_score= INT_MAX; |
| 163 | int best_cbpc_score= INT_MAX; |
| 164 | int cbpc = (-1), cbpy= (-1); |
| 165 | const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0); |
| 166 | const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); |
| 167 | |
| 168 | for(i=0; i<4; i++){ |
| 169 | int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda; |
| 170 | if(i&1) score += s->coded_score[5]; |
| 171 | if(i&2) score += s->coded_score[4]; |
| 172 | |
| 173 | if(score < best_cbpc_score){ |
| 174 | best_cbpc_score= score; |
| 175 | cbpc= i; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | for(i=0; i<16; i++){ |
| 180 | int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda; |
| 181 | if(i&1) score += s->coded_score[3]; |
| 182 | if(i&2) score += s->coded_score[2]; |
| 183 | if(i&4) score += s->coded_score[1]; |
| 184 | if(i&8) score += s->coded_score[0]; |
| 185 | |
| 186 | if(score < best_cbpy_score){ |
| 187 | best_cbpy_score= score; |
| 188 | cbpy= i; |
| 189 | } |
| 190 | } |
| 191 | cbp= cbpc + 4*cbpy; |
| 192 | if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){ |
| 193 | if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0) |
| 194 | cbp= 0; |
| 195 | } |
| 196 | |
| 197 | for (i = 0; i < 6; i++) { |
| 198 | if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ |
| 199 | s->block_last_index[i]= -1; |
| 200 | s->bdsp.clear_block(s->block[i]); |
| 201 | } |
| 202 | } |
| 203 | }else{ |
| 204 | cbp= 0; |
| 205 | for (i = 0; i < 6; i++) { |
| 206 | if (s->block_last_index[i] >= 0) |
| 207 | cbp |= 1 << (5 - i); |
| 208 | } |
| 209 | } |
| 210 | return cbp; |
| 211 | } |
| 212 | |
| 213 | static inline void memsetw(short *tab, int val, int n) |
| 214 | { |
| 215 | int i; |
| 216 | for(i=0;i<n;i++) |
| 217 | tab[i] = val; |
| 218 | } |
| 219 | |
| 220 | #endif /* AVCODEC_H263_H */ |