Libav 0.7.1
|
00001 /* 00002 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. 00003 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de> 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef AVCODEC_CAVS_H 00023 #define AVCODEC_CAVS_H 00024 00025 #include "dsputil.h" 00026 #include "mpegvideo.h" 00027 #include "cavsdsp.h" 00028 00029 #define SLICE_MAX_START_CODE 0x000001af 00030 #define EXT_START_CODE 0x000001b5 00031 #define USER_START_CODE 0x000001b2 00032 #define CAVS_START_CODE 0x000001b0 00033 #define PIC_I_START_CODE 0x000001b3 00034 #define PIC_PB_START_CODE 0x000001b6 00035 00036 #define A_AVAIL 1 00037 #define B_AVAIL 2 00038 #define C_AVAIL 4 00039 #define D_AVAIL 8 00040 #define NOT_AVAIL -1 00041 #define REF_INTRA -2 00042 #define REF_DIR -3 00043 00044 #define ESCAPE_CODE 59 00045 00046 #define FWD0 0x01 00047 #define FWD1 0x02 00048 #define BWD0 0x04 00049 #define BWD1 0x08 00050 #define SYM0 0x10 00051 #define SYM1 0x20 00052 #define SPLITH 0x40 00053 #define SPLITV 0x80 00054 00055 #define MV_BWD_OFFS 12 00056 #define MV_STRIDE 4 00057 00058 enum cavs_mb { 00059 I_8X8 = 0, 00060 P_SKIP, 00061 P_16X16, 00062 P_16X8, 00063 P_8X16, 00064 P_8X8, 00065 B_SKIP, 00066 B_DIRECT, 00067 B_FWD_16X16, 00068 B_BWD_16X16, 00069 B_SYM_16X16, 00070 B_8X8 = 29 00071 }; 00072 00073 enum cavs_sub_mb { 00074 B_SUB_DIRECT, 00075 B_SUB_FWD, 00076 B_SUB_BWD, 00077 B_SUB_SYM 00078 }; 00079 00080 enum cavs_intra_luma { 00081 INTRA_L_VERT, 00082 INTRA_L_HORIZ, 00083 INTRA_L_LP, 00084 INTRA_L_DOWN_LEFT, 00085 INTRA_L_DOWN_RIGHT, 00086 INTRA_L_LP_LEFT, 00087 INTRA_L_LP_TOP, 00088 INTRA_L_DC_128 00089 }; 00090 00091 enum cavs_intra_chroma { 00092 INTRA_C_LP, 00093 INTRA_C_HORIZ, 00094 INTRA_C_VERT, 00095 INTRA_C_PLANE, 00096 INTRA_C_LP_LEFT, 00097 INTRA_C_LP_TOP, 00098 INTRA_C_DC_128, 00099 }; 00100 00101 enum cavs_mv_pred { 00102 MV_PRED_MEDIAN, 00103 MV_PRED_LEFT, 00104 MV_PRED_TOP, 00105 MV_PRED_TOPRIGHT, 00106 MV_PRED_PSKIP, 00107 MV_PRED_BSKIP 00108 }; 00109 00110 enum cavs_block { 00111 BLK_16X16, 00112 BLK_16X8, 00113 BLK_8X16, 00114 BLK_8X8 00115 }; 00116 00117 enum cavs_mv_loc { 00118 MV_FWD_D3 = 0, 00119 MV_FWD_B2, 00120 MV_FWD_B3, 00121 MV_FWD_C2, 00122 MV_FWD_A1, 00123 MV_FWD_X0, 00124 MV_FWD_X1, 00125 MV_FWD_A3 = 8, 00126 MV_FWD_X2, 00127 MV_FWD_X3, 00128 MV_BWD_D3 = MV_BWD_OFFS, 00129 MV_BWD_B2, 00130 MV_BWD_B3, 00131 MV_BWD_C2, 00132 MV_BWD_A1, 00133 MV_BWD_X0, 00134 MV_BWD_X1, 00135 MV_BWD_A3 = MV_BWD_OFFS+8, 00136 MV_BWD_X2, 00137 MV_BWD_X3 00138 }; 00139 00140 DECLARE_ALIGNED(8, typedef, struct) { 00141 int16_t x; 00142 int16_t y; 00143 int16_t dist; 00144 int16_t ref; 00145 } cavs_vector; 00146 00147 struct dec_2dvlc { 00148 int8_t rltab[59][3]; 00149 int8_t level_add[27]; 00150 int8_t golomb_order; 00151 int inc_limit; 00152 int8_t max_run; 00153 }; 00154 00155 typedef struct { 00156 MpegEncContext s; 00157 CAVSDSPContext cdsp; 00158 Picture picture; 00159 Picture DPB[2]; 00160 int dist[2]; 00161 int profile, level; 00162 int aspect_ratio; 00163 int mb_width, mb_height; 00164 int pic_type; 00165 int stream_revision; 00166 int progressive; 00167 int pic_structure; 00168 int skip_mode_flag; 00169 int loop_filter_disable; 00170 int alpha_offset, beta_offset; 00171 int ref_flag; 00172 int mbx, mby, mbidx; 00173 int flags; 00174 int stc; 00175 uint8_t *cy, *cu, *cv; 00176 int left_qp; 00177 uint8_t *top_qp; 00178 00191 cavs_vector mv[2*4*3]; 00192 cavs_vector *top_mv[2]; 00193 cavs_vector *col_mv; 00194 00199 int pred_mode_Y[3*3]; 00200 int *top_pred_Y; 00201 int l_stride, c_stride; 00202 int luma_scan[4]; 00203 int qp; 00204 int qp_fixed; 00205 int cbp; 00206 ScanTable scantable; 00207 00210 uint8_t *top_border_y, *top_border_u, *top_border_v; 00211 uint8_t left_border_y[26], left_border_u[10], left_border_v[10]; 00212 uint8_t intern_border_y[26]; 00213 uint8_t topleft_border_y, topleft_border_u, topleft_border_v; 00214 00215 void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); 00216 void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); 00217 uint8_t *col_type_base; 00218 00219 /* scaling factors for MV prediction */ 00220 int sym_factor; 00221 int direct_den[2]; 00222 int scale_den[2]; 00223 00224 int got_keyframe; 00225 DCTELEM *block; 00226 } AVSContext; 00227 00228 extern const uint8_t ff_cavs_dequant_shift[64]; 00229 extern const uint16_t ff_cavs_dequant_mul[64]; 00230 extern const struct dec_2dvlc ff_cavs_intra_dec[7]; 00231 extern const struct dec_2dvlc ff_cavs_inter_dec[7]; 00232 extern const struct dec_2dvlc ff_cavs_chroma_dec[5]; 00233 extern const uint8_t ff_cavs_chroma_qp[64]; 00234 extern const uint8_t ff_cavs_scan3x3[4]; 00235 extern const uint8_t ff_cavs_partition_flags[30]; 00236 extern const int8_t ff_left_modifier_l[8]; 00237 extern const int8_t ff_top_modifier_l[8]; 00238 extern const int8_t ff_left_modifier_c[7]; 00239 extern const int8_t ff_top_modifier_c[7]; 00240 extern const cavs_vector ff_cavs_intra_mv; 00241 extern const cavs_vector ff_cavs_un_mv; 00242 extern const cavs_vector ff_cavs_dir_mv; 00243 00244 static inline void modify_pred(const int8_t *mod_table, int *mode) 00245 { 00246 *mode = mod_table[*mode]; 00247 if(*mode < 0) { 00248 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n"); 00249 *mode = 0; 00250 } 00251 } 00252 00253 static inline void set_intra_mode_default(AVSContext *h) { 00254 if(h->stream_revision > 0) { 00255 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL; 00256 h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = NOT_AVAIL; 00257 } else { 00258 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP; 00259 h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP; 00260 } 00261 } 00262 00263 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) { 00264 switch(size) { 00265 case BLK_16X16: 00266 mv[MV_STRIDE ] = mv[0]; 00267 mv[MV_STRIDE+1] = mv[0]; 00268 case BLK_16X8: 00269 mv[1] = mv[0]; 00270 break; 00271 case BLK_8X16: 00272 mv[MV_STRIDE] = mv[0]; 00273 break; 00274 } 00275 } 00276 00277 static inline void set_mv_intra(AVSContext *h) { 00278 h->mv[MV_FWD_X0] = ff_cavs_intra_mv; 00279 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); 00280 h->mv[MV_BWD_X0] = ff_cavs_intra_mv; 00281 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); 00282 if(h->pic_type != AV_PICTURE_TYPE_B) 00283 h->col_type_base[h->mbidx] = I_8X8; 00284 } 00285 00286 static inline int dequant(AVSContext *h, DCTELEM *level_buf, uint8_t *run_buf, 00287 DCTELEM *dst, int mul, int shift, int coeff_num) { 00288 int round = 1 << (shift - 1); 00289 int pos = -1; 00290 const uint8_t *scantab = h->scantable.permutated; 00291 00292 /* inverse scan and dequantization */ 00293 while(--coeff_num >= 0){ 00294 pos += run_buf[coeff_num]; 00295 if(pos > 63) { 00296 av_log(h->s.avctx, AV_LOG_ERROR, 00297 "position out of block bounds at pic %d MB(%d,%d)\n", 00298 h->picture.poc, h->mbx, h->mby); 00299 return -1; 00300 } 00301 dst[scantab[pos]] = (level_buf[coeff_num]*mul + round) >> shift; 00302 } 00303 return 0; 00304 } 00305 00306 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type); 00307 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, 00308 int block); 00309 void ff_cavs_load_intra_pred_chroma(AVSContext *h); 00310 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv); 00311 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type); 00312 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, 00313 enum cavs_mv_pred mode, enum cavs_block size, int ref); 00314 void ff_cavs_init_mb(AVSContext *h); 00315 int ff_cavs_next_mb(AVSContext *h); 00316 void ff_cavs_init_pic(AVSContext *h); 00317 void ff_cavs_init_top_lines(AVSContext *h); 00318 int ff_cavs_init(AVCodecContext *avctx); 00319 int ff_cavs_end (AVCodecContext *avctx); 00320 00321 #endif /* AVCODEC_CAVS_H */