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libavcodec/bink.c

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00001 /*
00002  * Bink video decoder
00003  * Copyright (c) 2009 Konstantin Shishkov
00004  * Copyright (C) 2011 Peter Ross <pross@xvid.org>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include "libavutil/imgutils.h"
00024 #include "avcodec.h"
00025 #include "dsputil.h"
00026 #include "binkdata.h"
00027 #include "mathops.h"
00028 
00029 #define ALT_BITSTREAM_READER_LE
00030 #include "get_bits.h"
00031 
00032 #define BINK_FLAG_ALPHA 0x00100000
00033 #define BINK_FLAG_GRAY  0x00020000
00034 
00035 static VLC bink_trees[16];
00036 
00040 enum OldSources {
00041     BINKB_SRC_BLOCK_TYPES = 0, 
00042     BINKB_SRC_COLORS,          
00043     BINKB_SRC_PATTERN,         
00044     BINKB_SRC_X_OFF,           
00045     BINKB_SRC_Y_OFF,           
00046     BINKB_SRC_INTRA_DC,        
00047     BINKB_SRC_INTER_DC,        
00048     BINKB_SRC_INTRA_Q,         
00049     BINKB_SRC_INTER_Q,         
00050     BINKB_SRC_INTER_COEFS,     
00051 
00052     BINKB_NB_SRC
00053 };
00054 
00055 static const int binkb_bundle_sizes[BINKB_NB_SRC] = {
00056     4, 8, 8, 5, 5, 11, 11, 4, 4, 7
00057 };
00058 
00059 static const int binkb_bundle_signed[BINKB_NB_SRC] = {
00060     0, 0, 0, 1, 1, 0, 1, 0, 0, 0
00061 };
00062 
00063 static uint32_t binkb_intra_quant[16][64];
00064 static uint32_t binkb_inter_quant[16][64];
00065 
00069 enum Sources {
00070     BINK_SRC_BLOCK_TYPES = 0, 
00071     BINK_SRC_SUB_BLOCK_TYPES, 
00072     BINK_SRC_COLORS,          
00073     BINK_SRC_PATTERN,         
00074     BINK_SRC_X_OFF,           
00075     BINK_SRC_Y_OFF,           
00076     BINK_SRC_INTRA_DC,        
00077     BINK_SRC_INTER_DC,        
00078     BINK_SRC_RUN,             
00079 
00080     BINK_NB_SRC
00081 };
00082 
00086 typedef struct Tree {
00087     int     vlc_num;  
00088     uint8_t syms[16]; 
00089 } Tree;
00090 
00091 #define GET_HUFF(gb, tree)  (tree).syms[get_vlc2(gb, bink_trees[(tree).vlc_num].table,\
00092                                                  bink_trees[(tree).vlc_num].bits, 1)]
00093 
00097 typedef struct Bundle {
00098     int     len;       
00099     Tree    tree;      
00100     uint8_t *data;     
00101     uint8_t *data_end; 
00102     uint8_t *cur_dec;  
00103     uint8_t *cur_ptr;  
00104 } Bundle;
00105 
00106 /*
00107  * Decoder context
00108  */
00109 typedef struct BinkContext {
00110     AVCodecContext *avctx;
00111     DSPContext     dsp;
00112     AVFrame        pic, last;
00113     int            version;              
00114     int            has_alpha;
00115     int            swap_planes;
00116     ScanTable      scantable;            
00117 
00118     Bundle         bundle[BINKB_NB_SRC]; 
00119     Tree           col_high[16];         
00120     int            col_lastval;          
00121 } BinkContext;
00122 
00126 enum BlockTypes {
00127     SKIP_BLOCK = 0, 
00128     SCALED_BLOCK,   
00129     MOTION_BLOCK,   
00130     RUN_BLOCK,      
00131     RESIDUE_BLOCK,  
00132     INTRA_BLOCK,    
00133     FILL_BLOCK,     
00134     INTER_BLOCK,    
00135     PATTERN_BLOCK,  
00136     RAW_BLOCK,      
00137 };
00138 
00146 static void init_lengths(BinkContext *c, int width, int bw)
00147 {
00148     c->bundle[BINK_SRC_BLOCK_TYPES].len = av_log2((width >> 3) + 511) + 1;
00149 
00150     c->bundle[BINK_SRC_SUB_BLOCK_TYPES].len = av_log2((width >> 4) + 511) + 1;
00151 
00152     c->bundle[BINK_SRC_COLORS].len = av_log2(bw*64 + 511) + 1;
00153 
00154     c->bundle[BINK_SRC_INTRA_DC].len =
00155     c->bundle[BINK_SRC_INTER_DC].len =
00156     c->bundle[BINK_SRC_X_OFF].len =
00157     c->bundle[BINK_SRC_Y_OFF].len = av_log2((width >> 3) + 511) + 1;
00158 
00159     c->bundle[BINK_SRC_PATTERN].len = av_log2((bw << 3) + 511) + 1;
00160 
00161     c->bundle[BINK_SRC_RUN].len = av_log2(bw*48 + 511) + 1;
00162 }
00163 
00169 static av_cold void init_bundles(BinkContext *c)
00170 {
00171     int bw, bh, blocks;
00172     int i;
00173 
00174     bw = (c->avctx->width  + 7) >> 3;
00175     bh = (c->avctx->height + 7) >> 3;
00176     blocks = bw * bh;
00177 
00178     for (i = 0; i < BINKB_NB_SRC; i++) {
00179         c->bundle[i].data = av_malloc(blocks * 64);
00180         c->bundle[i].data_end = c->bundle[i].data + blocks * 64;
00181     }
00182 }
00183 
00189 static av_cold void free_bundles(BinkContext *c)
00190 {
00191     int i;
00192     for (i = 0; i < BINKB_NB_SRC; i++)
00193         av_freep(&c->bundle[i].data);
00194 }
00195 
00204 static void merge(GetBitContext *gb, uint8_t *dst, uint8_t *src, int size)
00205 {
00206     uint8_t *src2 = src + size;
00207     int size2 = size;
00208 
00209     do {
00210         if (!get_bits1(gb)) {
00211             *dst++ = *src++;
00212             size--;
00213         } else {
00214             *dst++ = *src2++;
00215             size2--;
00216         }
00217     } while (size && size2);
00218 
00219     while (size--)
00220         *dst++ = *src++;
00221     while (size2--)
00222         *dst++ = *src2++;
00223 }
00224 
00231 static void read_tree(GetBitContext *gb, Tree *tree)
00232 {
00233     uint8_t tmp1[16], tmp2[16], *in = tmp1, *out = tmp2;
00234     int i, t, len;
00235 
00236     tree->vlc_num = get_bits(gb, 4);
00237     if (!tree->vlc_num) {
00238         for (i = 0; i < 16; i++)
00239             tree->syms[i] = i;
00240         return;
00241     }
00242     if (get_bits1(gb)) {
00243         len = get_bits(gb, 3);
00244         memset(tmp1, 0, sizeof(tmp1));
00245         for (i = 0; i <= len; i++) {
00246             tree->syms[i] = get_bits(gb, 4);
00247             tmp1[tree->syms[i]] = 1;
00248         }
00249         for (i = 0; i < 16 && len < 16 - 1; i++)
00250             if (!tmp1[i])
00251                 tree->syms[++len] = i;
00252     } else {
00253         len = get_bits(gb, 2);
00254         for (i = 0; i < 16; i++)
00255             in[i] = i;
00256         for (i = 0; i <= len; i++) {
00257             int size = 1 << i;
00258             for (t = 0; t < 16; t += size << 1)
00259                 merge(gb, out + t, in + t, size);
00260             FFSWAP(uint8_t*, in, out);
00261         }
00262         memcpy(tree->syms, in, 16);
00263     }
00264 }
00265 
00273 static void read_bundle(GetBitContext *gb, BinkContext *c, int bundle_num)
00274 {
00275     int i;
00276 
00277     if (bundle_num == BINK_SRC_COLORS) {
00278         for (i = 0; i < 16; i++)
00279             read_tree(gb, &c->col_high[i]);
00280         c->col_lastval = 0;
00281     }
00282     if (bundle_num != BINK_SRC_INTRA_DC && bundle_num != BINK_SRC_INTER_DC)
00283         read_tree(gb, &c->bundle[bundle_num].tree);
00284     c->bundle[bundle_num].cur_dec =
00285     c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
00286 }
00287 
00295 #define CHECK_READ_VAL(gb, b, t) \
00296     if (!b->cur_dec || (b->cur_dec > b->cur_ptr)) \
00297         return 0; \
00298     t = get_bits(gb, b->len); \
00299     if (!t) { \
00300         b->cur_dec = NULL; \
00301         return 0; \
00302     } \
00303 
00304 static int read_runs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
00305 {
00306     int t, v;
00307     const uint8_t *dec_end;
00308 
00309     CHECK_READ_VAL(gb, b, t);
00310     dec_end = b->cur_dec + t;
00311     if (dec_end > b->data_end) {
00312         av_log(avctx, AV_LOG_ERROR, "Run value went out of bounds\n");
00313         return -1;
00314     }
00315     if (get_bits1(gb)) {
00316         v = get_bits(gb, 4);
00317         memset(b->cur_dec, v, t);
00318         b->cur_dec += t;
00319     } else {
00320         while (b->cur_dec < dec_end)
00321             *b->cur_dec++ = GET_HUFF(gb, b->tree);
00322     }
00323     return 0;
00324 }
00325 
00326 static int read_motion_values(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
00327 {
00328     int t, sign, v;
00329     const uint8_t *dec_end;
00330 
00331     CHECK_READ_VAL(gb, b, t);
00332     dec_end = b->cur_dec + t;
00333     if (dec_end > b->data_end) {
00334         av_log(avctx, AV_LOG_ERROR, "Too many motion values\n");
00335         return -1;
00336     }
00337     if (get_bits1(gb)) {
00338         v = get_bits(gb, 4);
00339         if (v) {
00340             sign = -get_bits1(gb);
00341             v = (v ^ sign) - sign;
00342         }
00343         memset(b->cur_dec, v, t);
00344         b->cur_dec += t;
00345     } else {
00346         while (b->cur_dec < dec_end) {
00347             v = GET_HUFF(gb, b->tree);
00348             if (v) {
00349                 sign = -get_bits1(gb);
00350                 v = (v ^ sign) - sign;
00351             }
00352             *b->cur_dec++ = v;
00353         }
00354     }
00355     return 0;
00356 }
00357 
00358 static const uint8_t bink_rlelens[4] = { 4, 8, 12, 32 };
00359 
00360 static int read_block_types(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
00361 {
00362     int t, v;
00363     int last = 0;
00364     const uint8_t *dec_end;
00365 
00366     CHECK_READ_VAL(gb, b, t);
00367     dec_end = b->cur_dec + t;
00368     if (dec_end > b->data_end) {
00369         av_log(avctx, AV_LOG_ERROR, "Too many block type values\n");
00370         return -1;
00371     }
00372     if (get_bits1(gb)) {
00373         v = get_bits(gb, 4);
00374         memset(b->cur_dec, v, t);
00375         b->cur_dec += t;
00376     } else {
00377         while (b->cur_dec < dec_end) {
00378             v = GET_HUFF(gb, b->tree);
00379             if (v < 12) {
00380                 last = v;
00381                 *b->cur_dec++ = v;
00382             } else {
00383                 int run = bink_rlelens[v - 12];
00384 
00385                 if (dec_end - b->cur_dec < run)
00386                     return -1;
00387                 memset(b->cur_dec, last, run);
00388                 b->cur_dec += run;
00389             }
00390         }
00391     }
00392     return 0;
00393 }
00394 
00395 static int read_patterns(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
00396 {
00397     int t, v;
00398     const uint8_t *dec_end;
00399 
00400     CHECK_READ_VAL(gb, b, t);
00401     dec_end = b->cur_dec + t;
00402     if (dec_end > b->data_end) {
00403         av_log(avctx, AV_LOG_ERROR, "Too many pattern values\n");
00404         return -1;
00405     }
00406     while (b->cur_dec < dec_end) {
00407         v  = GET_HUFF(gb, b->tree);
00408         v |= GET_HUFF(gb, b->tree) << 4;
00409         *b->cur_dec++ = v;
00410     }
00411 
00412     return 0;
00413 }
00414 
00415 static int read_colors(GetBitContext *gb, Bundle *b, BinkContext *c)
00416 {
00417     int t, sign, v;
00418     const uint8_t *dec_end;
00419 
00420     CHECK_READ_VAL(gb, b, t);
00421     dec_end = b->cur_dec + t;
00422     if (dec_end > b->data_end) {
00423         av_log(c->avctx, AV_LOG_ERROR, "Too many color values\n");
00424         return -1;
00425     }
00426     if (get_bits1(gb)) {
00427         c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
00428         v = GET_HUFF(gb, b->tree);
00429         v = (c->col_lastval << 4) | v;
00430         if (c->version < 'i') {
00431             sign = ((int8_t) v) >> 7;
00432             v = ((v & 0x7F) ^ sign) - sign;
00433             v += 0x80;
00434         }
00435         memset(b->cur_dec, v, t);
00436         b->cur_dec += t;
00437     } else {
00438         while (b->cur_dec < dec_end) {
00439             c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
00440             v = GET_HUFF(gb, b->tree);
00441             v = (c->col_lastval << 4) | v;
00442             if (c->version < 'i') {
00443                 sign = ((int8_t) v) >> 7;
00444                 v = ((v & 0x7F) ^ sign) - sign;
00445                 v += 0x80;
00446             }
00447             *b->cur_dec++ = v;
00448         }
00449     }
00450     return 0;
00451 }
00452 
00454 #define DC_START_BITS 11
00455 
00456 static int read_dcs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b,
00457                     int start_bits, int has_sign)
00458 {
00459     int i, j, len, len2, bsize, sign, v, v2;
00460     int16_t *dst     = (int16_t*)b->cur_dec;
00461     int16_t *dst_end = (int16_t*)b->data_end;
00462 
00463     CHECK_READ_VAL(gb, b, len);
00464     v = get_bits(gb, start_bits - has_sign);
00465     if (v && has_sign) {
00466         sign = -get_bits1(gb);
00467         v = (v ^ sign) - sign;
00468     }
00469     if (dst_end - dst < 1)
00470         return -1;
00471     *dst++ = v;
00472     len--;
00473     for (i = 0; i < len; i += 8) {
00474         len2 = FFMIN(len - i, 8);
00475         if (dst_end - dst < len2)
00476             return -1;
00477         bsize = get_bits(gb, 4);
00478         if (bsize) {
00479             for (j = 0; j < len2; j++) {
00480                 v2 = get_bits(gb, bsize);
00481                 if (v2) {
00482                     sign = -get_bits1(gb);
00483                     v2 = (v2 ^ sign) - sign;
00484                 }
00485                 v += v2;
00486                 *dst++ = v;
00487                 if (v < -32768 || v > 32767) {
00488                     av_log(avctx, AV_LOG_ERROR, "DC value went out of bounds: %d\n", v);
00489                     return -1;
00490                 }
00491             }
00492         } else {
00493             for (j = 0; j < len2; j++)
00494                 *dst++ = v;
00495         }
00496     }
00497 
00498     b->cur_dec = (uint8_t*)dst;
00499     return 0;
00500 }
00501 
00508 static inline int get_value(BinkContext *c, int bundle)
00509 {
00510     int ret;
00511 
00512     if (bundle < BINK_SRC_X_OFF || bundle == BINK_SRC_RUN)
00513         return *c->bundle[bundle].cur_ptr++;
00514     if (bundle == BINK_SRC_X_OFF || bundle == BINK_SRC_Y_OFF)
00515         return (int8_t)*c->bundle[bundle].cur_ptr++;
00516     ret = *(int16_t*)c->bundle[bundle].cur_ptr;
00517     c->bundle[bundle].cur_ptr += 2;
00518     return ret;
00519 }
00520 
00521 static void binkb_init_bundle(BinkContext *c, int bundle_num)
00522 {
00523     c->bundle[bundle_num].cur_dec =
00524     c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
00525     c->bundle[bundle_num].len = 13;
00526 }
00527 
00528 static void binkb_init_bundles(BinkContext *c)
00529 {
00530     int i;
00531     for (i = 0; i < BINKB_NB_SRC; i++)
00532         binkb_init_bundle(c, i);
00533 }
00534 
00535 static int binkb_read_bundle(BinkContext *c, GetBitContext *gb, int bundle_num)
00536 {
00537     const int bits = binkb_bundle_sizes[bundle_num];
00538     const int mask = 1 << (bits - 1);
00539     const int issigned = binkb_bundle_signed[bundle_num];
00540     Bundle *b = &c->bundle[bundle_num];
00541     int i, len;
00542 
00543     CHECK_READ_VAL(gb, b, len);
00544     if (b->data_end - b->cur_dec < len * (1 + (bits > 8)))
00545         return -1;
00546     if (bits <= 8) {
00547         if (!issigned) {
00548             for (i = 0; i < len; i++)
00549                 *b->cur_dec++ = get_bits(gb, bits);
00550         } else {
00551             for (i = 0; i < len; i++)
00552                 *b->cur_dec++ = get_bits(gb, bits) - mask;
00553         }
00554     } else {
00555         int16_t *dst = (int16_t*)b->cur_dec;
00556 
00557         if (!issigned) {
00558             for (i = 0; i < len; i++)
00559                 *dst++ = get_bits(gb, bits);
00560         } else {
00561             for (i = 0; i < len; i++)
00562                 *dst++ = get_bits(gb, bits) - mask;
00563         }
00564         b->cur_dec = (uint8_t*)dst;
00565     }
00566     return 0;
00567 }
00568 
00569 static inline int binkb_get_value(BinkContext *c, int bundle_num)
00570 {
00571     int16_t ret;
00572     const int bits = binkb_bundle_sizes[bundle_num];
00573 
00574     if (bits <= 8) {
00575         int val = *c->bundle[bundle_num].cur_ptr++;
00576         return binkb_bundle_signed[bundle_num] ? (int8_t)val : val;
00577     }
00578     ret = *(int16_t*)c->bundle[bundle_num].cur_ptr;
00579     c->bundle[bundle_num].cur_ptr += 2;
00580     return ret;
00581 }
00582 
00583 static inline DCTELEM dequant(DCTELEM in, uint32_t quant, int dc)
00584 {
00585     /* Note: multiplication is unsigned but we want signed shift
00586      * otherwise clipping breaks.
00587      * TODO: The official decoder does not use clipping at all
00588      * but instead uses the full 32-bit result.
00589      * However clipping at least gets rid of the case that a
00590      * half-black half-white intra block gets black and white swapped
00591      * and should cause at most minor differences (except for DC). */
00592     int32_t res = in * quant;
00593     res >>= 11;
00594     if (!dc)
00595         res = av_clip_int16(res);
00596     return res;
00597 }
00598 
00608 static int read_dct_coeffs(GetBitContext *gb, DCTELEM block[64], const uint8_t *scan,
00609                            const uint32_t quant_matrices[16][64], int q)
00610 {
00611     int coef_list[128];
00612     int mode_list[128];
00613     int i, t, mask, bits, ccoef, mode, sign;
00614     int list_start = 64, list_end = 64, list_pos;
00615     int coef_count = 0;
00616     int coef_idx[64];
00617     int quant_idx;
00618     const uint32_t *quant;
00619 
00620     coef_list[list_end] = 4;  mode_list[list_end++] = 0;
00621     coef_list[list_end] = 24; mode_list[list_end++] = 0;
00622     coef_list[list_end] = 44; mode_list[list_end++] = 0;
00623     coef_list[list_end] = 1;  mode_list[list_end++] = 3;
00624     coef_list[list_end] = 2;  mode_list[list_end++] = 3;
00625     coef_list[list_end] = 3;  mode_list[list_end++] = 3;
00626 
00627     bits = get_bits(gb, 4) - 1;
00628     for (mask = 1 << bits; bits >= 0; mask >>= 1, bits--) {
00629         list_pos = list_start;
00630         while (list_pos < list_end) {
00631             if (!(mode_list[list_pos] | coef_list[list_pos]) || !get_bits1(gb)) {
00632                 list_pos++;
00633                 continue;
00634             }
00635             ccoef = coef_list[list_pos];
00636             mode  = mode_list[list_pos];
00637             switch (mode) {
00638             case 0:
00639                 coef_list[list_pos] = ccoef + 4;
00640                 mode_list[list_pos] = 1;
00641             case 2:
00642                 if (mode == 2) {
00643                     coef_list[list_pos]   = 0;
00644                     mode_list[list_pos++] = 0;
00645                 }
00646                 for (i = 0; i < 4; i++, ccoef++) {
00647                     if (get_bits1(gb)) {
00648                         coef_list[--list_start] = ccoef;
00649                         mode_list[  list_start] = 3;
00650                     } else {
00651                         int t;
00652                         if (!bits) {
00653                             t = 1 - (get_bits1(gb) << 1);
00654                         } else {
00655                             t = get_bits(gb, bits) | mask;
00656                             sign = -get_bits1(gb);
00657                             t = (t ^ sign) - sign;
00658                         }
00659                         block[scan[ccoef]] = t;
00660                         coef_idx[coef_count++] = ccoef;
00661                     }
00662                 }
00663                 break;
00664             case 1:
00665                 mode_list[list_pos] = 2;
00666                 for (i = 0; i < 3; i++) {
00667                     ccoef += 4;
00668                     coef_list[list_end]   = ccoef;
00669                     mode_list[list_end++] = 2;
00670                 }
00671                 break;
00672             case 3:
00673                 if (!bits) {
00674                     t = 1 - (get_bits1(gb) << 1);
00675                 } else {
00676                     t = get_bits(gb, bits) | mask;
00677                     sign = -get_bits1(gb);
00678                     t = (t ^ sign) - sign;
00679                 }
00680                 block[scan[ccoef]] = t;
00681                 coef_idx[coef_count++] = ccoef;
00682                 coef_list[list_pos]   = 0;
00683                 mode_list[list_pos++] = 0;
00684                 break;
00685             }
00686         }
00687     }
00688 
00689     if (q == -1) {
00690         quant_idx = get_bits(gb, 4);
00691     } else {
00692         quant_idx = q;
00693     }
00694 
00695     quant = quant_matrices[quant_idx];
00696 
00697     block[0] = dequant(block[0], quant[0], 1);
00698     for (i = 0; i < coef_count; i++) {
00699         int idx = coef_idx[i];
00700         block[scan[idx]] = dequant(block[scan[idx]], quant[idx], 0);
00701     }
00702 
00703     return 0;
00704 }
00705 
00714 static int read_residue(GetBitContext *gb, DCTELEM block[64], int masks_count)
00715 {
00716     int coef_list[128];
00717     int mode_list[128];
00718     int i, sign, mask, ccoef, mode;
00719     int list_start = 64, list_end = 64, list_pos;
00720     int nz_coeff[64];
00721     int nz_coeff_count = 0;
00722 
00723     coef_list[list_end] =  4; mode_list[list_end++] = 0;
00724     coef_list[list_end] = 24; mode_list[list_end++] = 0;
00725     coef_list[list_end] = 44; mode_list[list_end++] = 0;
00726     coef_list[list_end] =  0; mode_list[list_end++] = 2;
00727 
00728     for (mask = 1 << get_bits(gb, 3); mask; mask >>= 1) {
00729         for (i = 0; i < nz_coeff_count; i++) {
00730             if (!get_bits1(gb))
00731                 continue;
00732             if (block[nz_coeff[i]] < 0)
00733                 block[nz_coeff[i]] -= mask;
00734             else
00735                 block[nz_coeff[i]] += mask;
00736             masks_count--;
00737             if (masks_count < 0)
00738                 return 0;
00739         }
00740         list_pos = list_start;
00741         while (list_pos < list_end) {
00742             if (!(coef_list[list_pos] | mode_list[list_pos]) || !get_bits1(gb)) {
00743                 list_pos++;
00744                 continue;
00745             }
00746             ccoef = coef_list[list_pos];
00747             mode  = mode_list[list_pos];
00748             switch (mode) {
00749             case 0:
00750                 coef_list[list_pos] = ccoef + 4;
00751                 mode_list[list_pos] = 1;
00752             case 2:
00753                 if (mode == 2) {
00754                     coef_list[list_pos]   = 0;
00755                     mode_list[list_pos++] = 0;
00756                 }
00757                 for (i = 0; i < 4; i++, ccoef++) {
00758                     if (get_bits1(gb)) {
00759                         coef_list[--list_start] = ccoef;
00760                         mode_list[  list_start] = 3;
00761                     } else {
00762                         nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
00763                         sign = -get_bits1(gb);
00764                         block[bink_scan[ccoef]] = (mask ^ sign) - sign;
00765                         masks_count--;
00766                         if (masks_count < 0)
00767                             return 0;
00768                     }
00769                 }
00770                 break;
00771             case 1:
00772                 mode_list[list_pos] = 2;
00773                 for (i = 0; i < 3; i++) {
00774                     ccoef += 4;
00775                     coef_list[list_end]   = ccoef;
00776                     mode_list[list_end++] = 2;
00777                 }
00778                 break;
00779             case 3:
00780                 nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
00781                 sign = -get_bits1(gb);
00782                 block[bink_scan[ccoef]] = (mask ^ sign) - sign;
00783                 coef_list[list_pos]   = 0;
00784                 mode_list[list_pos++] = 0;
00785                 masks_count--;
00786                 if (masks_count < 0)
00787                     return 0;
00788                 break;
00789             }
00790         }
00791     }
00792 
00793     return 0;
00794 }
00795 
00799 static inline void put_pixels8x8_overlapped(uint8_t *dst, uint8_t *src, int stride)
00800 {
00801     uint8_t tmp[64];
00802     int i;
00803     for (i = 0; i < 8; i++)
00804         memcpy(tmp + i*8, src + i*stride, 8);
00805     for (i = 0; i < 8; i++)
00806         memcpy(dst + i*stride, tmp + i*8, 8);
00807 }
00808 
00809 static int binkb_decode_plane(BinkContext *c, GetBitContext *gb, int plane_idx,
00810                               int is_key, int is_chroma)
00811 {
00812     int blk;
00813     int i, j, bx, by;
00814     uint8_t *dst, *ref, *ref_start, *ref_end;
00815     int v, col[2];
00816     const uint8_t *scan;
00817     int xoff, yoff;
00818     LOCAL_ALIGNED_16(DCTELEM, block, [64]);
00819     int coordmap[64];
00820     int ybias = is_key ? -15 : 0;
00821     int qp;
00822 
00823     const int stride = c->pic.linesize[plane_idx];
00824     int bw = is_chroma ? (c->avctx->width  + 15) >> 4 : (c->avctx->width  + 7) >> 3;
00825     int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
00826 
00827     binkb_init_bundles(c);
00828     ref_start = c->pic.data[plane_idx];
00829     ref_end   = c->pic.data[plane_idx] + (bh * c->pic.linesize[plane_idx] + bw) * 8;
00830 
00831     for (i = 0; i < 64; i++)
00832         coordmap[i] = (i & 7) + (i >> 3) * stride;
00833 
00834     for (by = 0; by < bh; by++) {
00835         for (i = 0; i < BINKB_NB_SRC; i++) {
00836             if (binkb_read_bundle(c, gb, i) < 0)
00837                 return -1;
00838         }
00839 
00840         dst  = c->pic.data[plane_idx]  + 8*by*stride;
00841         for (bx = 0; bx < bw; bx++, dst += 8) {
00842             blk = binkb_get_value(c, BINKB_SRC_BLOCK_TYPES);
00843             switch (blk) {
00844             case 0:
00845                 break;
00846             case 1:
00847                 scan = bink_patterns[get_bits(gb, 4)];
00848                 i = 0;
00849                 do {
00850                     int mode, run;
00851 
00852                     mode = get_bits1(gb);
00853                     run = get_bits(gb, binkb_runbits[i]) + 1;
00854 
00855                     i += run;
00856                     if (i > 64) {
00857                         av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
00858                         return -1;
00859                     }
00860                     if (mode) {
00861                         v = binkb_get_value(c, BINKB_SRC_COLORS);
00862                         for (j = 0; j < run; j++)
00863                             dst[coordmap[*scan++]] = v;
00864                     } else {
00865                         for (j = 0; j < run; j++)
00866                             dst[coordmap[*scan++]] = binkb_get_value(c, BINKB_SRC_COLORS);
00867                     }
00868                 } while (i < 63);
00869                 if (i == 63)
00870                     dst[coordmap[*scan++]] = binkb_get_value(c, BINKB_SRC_COLORS);
00871                 break;
00872             case 2:
00873                 c->dsp.clear_block(block);
00874                 block[0] = binkb_get_value(c, BINKB_SRC_INTRA_DC);
00875                 qp = binkb_get_value(c, BINKB_SRC_INTRA_Q);
00876                 read_dct_coeffs(gb, block, c->scantable.permutated, binkb_intra_quant, qp);
00877                 c->dsp.idct_put(dst, stride, block);
00878                 break;
00879             case 3:
00880                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
00881                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
00882                 ref = dst + xoff + yoff * stride;
00883                 if (ref < ref_start || ref + 8*stride > ref_end) {
00884                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
00885                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
00886                     c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
00887                 } else {
00888                     put_pixels8x8_overlapped(dst, ref, stride);
00889                 }
00890                 c->dsp.clear_block(block);
00891                 v = binkb_get_value(c, BINKB_SRC_INTER_COEFS);
00892                 read_residue(gb, block, v);
00893                 c->dsp.add_pixels8(dst, block, stride);
00894                 break;
00895             case 4:
00896                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
00897                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
00898                 ref = dst + xoff + yoff * stride;
00899                 if (ref < ref_start || ref + 8 * stride > ref_end) {
00900                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
00901                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
00902                     c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
00903                 } else {
00904                     put_pixels8x8_overlapped(dst, ref, stride);
00905                 }
00906                 c->dsp.clear_block(block);
00907                 block[0] = binkb_get_value(c, BINKB_SRC_INTER_DC);
00908                 qp = binkb_get_value(c, BINKB_SRC_INTER_Q);
00909                 read_dct_coeffs(gb, block, c->scantable.permutated, binkb_inter_quant, qp);
00910                 c->dsp.idct_add(dst, stride, block);
00911                 break;
00912             case 5:
00913                 v = binkb_get_value(c, BINKB_SRC_COLORS);
00914                 c->dsp.fill_block_tab[1](dst, v, stride, 8);
00915                 break;
00916             case 6:
00917                 for (i = 0; i < 2; i++)
00918                     col[i] = binkb_get_value(c, BINKB_SRC_COLORS);
00919                 for (i = 0; i < 8; i++) {
00920                     v = binkb_get_value(c, BINKB_SRC_PATTERN);
00921                     for (j = 0; j < 8; j++, v >>= 1)
00922                         dst[i*stride + j] = col[v & 1];
00923                 }
00924                 break;
00925             case 7:
00926                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
00927                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
00928                 ref = dst + xoff + yoff * stride;
00929                 if (ref < ref_start || ref + 8 * stride > ref_end) {
00930                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
00931                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
00932                     c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
00933                 } else {
00934                     put_pixels8x8_overlapped(dst, ref, stride);
00935                 }
00936                 break;
00937             case 8:
00938                 for (i = 0; i < 8; i++)
00939                     memcpy(dst + i*stride, c->bundle[BINKB_SRC_COLORS].cur_ptr + i*8, 8);
00940                 c->bundle[BINKB_SRC_COLORS].cur_ptr += 64;
00941                 break;
00942             default:
00943                 av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);
00944                 return -1;
00945             }
00946         }
00947     }
00948     if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
00949         skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
00950 
00951     return 0;
00952 }
00953 
00954 static int bink_decode_plane(BinkContext *c, GetBitContext *gb, int plane_idx,
00955                              int is_chroma)
00956 {
00957     int blk;
00958     int i, j, bx, by;
00959     uint8_t *dst, *prev, *ref, *ref_start, *ref_end;
00960     int v, col[2];
00961     const uint8_t *scan;
00962     int xoff, yoff;
00963     LOCAL_ALIGNED_16(DCTELEM, block, [64]);
00964     LOCAL_ALIGNED_16(uint8_t, ublock, [64]);
00965     int coordmap[64];
00966 
00967     const int stride = c->pic.linesize[plane_idx];
00968     int bw = is_chroma ? (c->avctx->width  + 15) >> 4 : (c->avctx->width  + 7) >> 3;
00969     int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
00970     int width = c->avctx->width >> is_chroma;
00971 
00972     init_lengths(c, FFMAX(width, 8), bw);
00973     for (i = 0; i < BINK_NB_SRC; i++)
00974         read_bundle(gb, c, i);
00975 
00976     ref_start = c->last.data[plane_idx] ? c->last.data[plane_idx]
00977                                         : c->pic.data[plane_idx];
00978     ref_end   = ref_start
00979                 + (bw - 1 + c->last.linesize[plane_idx] * (bh - 1)) * 8;
00980 
00981     for (i = 0; i < 64; i++)
00982         coordmap[i] = (i & 7) + (i >> 3) * stride;
00983 
00984     for (by = 0; by < bh; by++) {
00985         if (read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_BLOCK_TYPES]) < 0)
00986             return -1;
00987         if (read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_SUB_BLOCK_TYPES]) < 0)
00988             return -1;
00989         if (read_colors(gb, &c->bundle[BINK_SRC_COLORS], c) < 0)
00990             return -1;
00991         if (read_patterns(c->avctx, gb, &c->bundle[BINK_SRC_PATTERN]) < 0)
00992             return -1;
00993         if (read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_X_OFF]) < 0)
00994             return -1;
00995         if (read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_Y_OFF]) < 0)
00996             return -1;
00997         if (read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTRA_DC], DC_START_BITS, 0) < 0)
00998             return -1;
00999         if (read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTER_DC], DC_START_BITS, 1) < 0)
01000             return -1;
01001         if (read_runs(c->avctx, gb, &c->bundle[BINK_SRC_RUN]) < 0)
01002             return -1;
01003 
01004         if (by == bh)
01005             break;
01006         dst  = c->pic.data[plane_idx]  + 8*by*stride;
01007         prev = (c->last.data[plane_idx] ? c->last.data[plane_idx]
01008                                         : c->pic.data[plane_idx]) + 8*by*stride;
01009         for (bx = 0; bx < bw; bx++, dst += 8, prev += 8) {
01010             blk = get_value(c, BINK_SRC_BLOCK_TYPES);
01011             // 16x16 block type on odd line means part of the already decoded block, so skip it
01012             if ((by & 1) && blk == SCALED_BLOCK) {
01013                 bx++;
01014                 dst  += 8;
01015                 prev += 8;
01016                 continue;
01017             }
01018             switch (blk) {
01019             case SKIP_BLOCK:
01020                 c->dsp.put_pixels_tab[1][0](dst, prev, stride, 8);
01021                 break;
01022             case SCALED_BLOCK:
01023                 blk = get_value(c, BINK_SRC_SUB_BLOCK_TYPES);
01024                 switch (blk) {
01025                 case RUN_BLOCK:
01026                     scan = bink_patterns[get_bits(gb, 4)];
01027                     i = 0;
01028                     do {
01029                         int run = get_value(c, BINK_SRC_RUN) + 1;
01030 
01031                         i += run;
01032                         if (i > 64) {
01033                             av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
01034                             return -1;
01035                         }
01036                         if (get_bits1(gb)) {
01037                             v = get_value(c, BINK_SRC_COLORS);
01038                             for (j = 0; j < run; j++)
01039                                 ublock[*scan++] = v;
01040                         } else {
01041                             for (j = 0; j < run; j++)
01042                                 ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
01043                         }
01044                     } while (i < 63);
01045                     if (i == 63)
01046                         ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
01047                     break;
01048                 case INTRA_BLOCK:
01049                     c->dsp.clear_block(block);
01050                     block[0] = get_value(c, BINK_SRC_INTRA_DC);
01051                     read_dct_coeffs(gb, block, c->scantable.permutated, bink_intra_quant, -1);
01052                     c->dsp.idct(block);
01053                     c->dsp.put_pixels_nonclamped(block, ublock, 8);
01054                     break;
01055                 case FILL_BLOCK:
01056                     v = get_value(c, BINK_SRC_COLORS);
01057                     c->dsp.fill_block_tab[0](dst, v, stride, 16);
01058                     break;
01059                 case PATTERN_BLOCK:
01060                     for (i = 0; i < 2; i++)
01061                         col[i] = get_value(c, BINK_SRC_COLORS);
01062                     for (j = 0; j < 8; j++) {
01063                         v = get_value(c, BINK_SRC_PATTERN);
01064                         for (i = 0; i < 8; i++, v >>= 1)
01065                             ublock[i + j*8] = col[v & 1];
01066                     }
01067                     break;
01068                 case RAW_BLOCK:
01069                     for (j = 0; j < 8; j++)
01070                         for (i = 0; i < 8; i++)
01071                             ublock[i + j*8] = get_value(c, BINK_SRC_COLORS);
01072                     break;
01073                 default:
01074                     av_log(c->avctx, AV_LOG_ERROR, "Incorrect 16x16 block type %d\n", blk);
01075                     return -1;
01076                 }
01077                 if (blk != FILL_BLOCK)
01078                 c->dsp.scale_block(ublock, dst, stride);
01079                 bx++;
01080                 dst  += 8;
01081                 prev += 8;
01082                 break;
01083             case MOTION_BLOCK:
01084                 xoff = get_value(c, BINK_SRC_X_OFF);
01085                 yoff = get_value(c, BINK_SRC_Y_OFF);
01086                 ref = prev + xoff + yoff * stride;
01087                 if (ref < ref_start || ref > ref_end) {
01088                     av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
01089                            bx*8 + xoff, by*8 + yoff);
01090                     return -1;
01091                 }
01092                 c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
01093                 break;
01094             case RUN_BLOCK:
01095                 scan = bink_patterns[get_bits(gb, 4)];
01096                 i = 0;
01097                 do {
01098                     int run = get_value(c, BINK_SRC_RUN) + 1;
01099 
01100                     i += run;
01101                     if (i > 64) {
01102                         av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
01103                         return -1;
01104                     }
01105                     if (get_bits1(gb)) {
01106                         v = get_value(c, BINK_SRC_COLORS);
01107                         for (j = 0; j < run; j++)
01108                             dst[coordmap[*scan++]] = v;
01109                     } else {
01110                         for (j = 0; j < run; j++)
01111                             dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
01112                     }
01113                 } while (i < 63);
01114                 if (i == 63)
01115                     dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
01116                 break;
01117             case RESIDUE_BLOCK:
01118                 xoff = get_value(c, BINK_SRC_X_OFF);
01119                 yoff = get_value(c, BINK_SRC_Y_OFF);
01120                 ref = prev + xoff + yoff * stride;
01121                 if (ref < ref_start || ref > ref_end) {
01122                     av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
01123                            bx*8 + xoff, by*8 + yoff);
01124                     return -1;
01125                 }
01126                 c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
01127                 c->dsp.clear_block(block);
01128                 v = get_bits(gb, 7);
01129                 read_residue(gb, block, v);
01130                 c->dsp.add_pixels8(dst, block, stride);
01131                 break;
01132             case INTRA_BLOCK:
01133                 c->dsp.clear_block(block);
01134                 block[0] = get_value(c, BINK_SRC_INTRA_DC);
01135                 read_dct_coeffs(gb, block, c->scantable.permutated, bink_intra_quant, -1);
01136                 c->dsp.idct_put(dst, stride, block);
01137                 break;
01138             case FILL_BLOCK:
01139                 v = get_value(c, BINK_SRC_COLORS);
01140                 c->dsp.fill_block_tab[1](dst, v, stride, 8);
01141                 break;
01142             case INTER_BLOCK:
01143                 xoff = get_value(c, BINK_SRC_X_OFF);
01144                 yoff = get_value(c, BINK_SRC_Y_OFF);
01145                 ref = prev + xoff + yoff * stride;
01146                 c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
01147                 c->dsp.clear_block(block);
01148                 block[0] = get_value(c, BINK_SRC_INTER_DC);
01149                 read_dct_coeffs(gb, block, c->scantable.permutated, bink_inter_quant, -1);
01150                 c->dsp.idct_add(dst, stride, block);
01151                 break;
01152             case PATTERN_BLOCK:
01153                 for (i = 0; i < 2; i++)
01154                     col[i] = get_value(c, BINK_SRC_COLORS);
01155                 for (i = 0; i < 8; i++) {
01156                     v = get_value(c, BINK_SRC_PATTERN);
01157                     for (j = 0; j < 8; j++, v >>= 1)
01158                         dst[i*stride + j] = col[v & 1];
01159                 }
01160                 break;
01161             case RAW_BLOCK:
01162                 for (i = 0; i < 8; i++)
01163                     memcpy(dst + i*stride, c->bundle[BINK_SRC_COLORS].cur_ptr + i*8, 8);
01164                 c->bundle[BINK_SRC_COLORS].cur_ptr += 64;
01165                 break;
01166             default:
01167                 av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);
01168                 return -1;
01169             }
01170         }
01171     }
01172     if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
01173         skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
01174 
01175     return 0;
01176 }
01177 
01178 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt)
01179 {
01180     BinkContext * const c = avctx->priv_data;
01181     GetBitContext gb;
01182     int plane, plane_idx;
01183     int bits_count = pkt->size << 3;
01184 
01185     if (c->version > 'b') {
01186         if(c->pic.data[0])
01187             avctx->release_buffer(avctx, &c->pic);
01188 
01189         if(avctx->get_buffer(avctx, &c->pic) < 0){
01190             av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
01191             return -1;
01192         }
01193     } else {
01194         if(avctx->reget_buffer(avctx, &c->pic) < 0){
01195             av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
01196             return -1;
01197         }
01198     }
01199 
01200     init_get_bits(&gb, pkt->data, bits_count);
01201     if (c->has_alpha) {
01202         if (c->version >= 'i')
01203             skip_bits_long(&gb, 32);
01204         if (bink_decode_plane(c, &gb, 3, 0) < 0)
01205             return -1;
01206     }
01207     if (c->version >= 'i')
01208         skip_bits_long(&gb, 32);
01209 
01210     for (plane = 0; plane < 3; plane++) {
01211         plane_idx = (!plane || !c->swap_planes) ? plane : (plane ^ 3);
01212 
01213         if (c->version > 'b') {
01214             if (bink_decode_plane(c, &gb, plane_idx, !!plane) < 0)
01215                 return -1;
01216         } else {
01217             if (binkb_decode_plane(c, &gb, plane_idx, !pkt->pts, !!plane) < 0)
01218                 return -1;
01219         }
01220         if (get_bits_count(&gb) >= bits_count)
01221             break;
01222     }
01223     emms_c();
01224 
01225     *data_size = sizeof(AVFrame);
01226     *(AVFrame*)data = c->pic;
01227 
01228     if (c->version > 'b')
01229         FFSWAP(AVFrame, c->pic, c->last);
01230 
01231     /* always report that the buffer was completely consumed */
01232     return pkt->size;
01233 }
01234 
01238 static av_cold void binkb_calc_quant(void)
01239 {
01240     uint8_t inv_bink_scan[64];
01241     double s[64];
01242     int i, j;
01243 
01244     for (j = 0; j < 8; j++) {
01245         for (i = 0; i < 8; i++) {
01246             if (j && j != 4)
01247                if (i && i != 4)
01248                    s[j*8 + i] = cos(j * M_PI/16.0) * cos(i * M_PI/16.0) * 2.0;
01249                else
01250                    s[j*8 + i] = cos(j * M_PI/16.0) * sqrt(2.0);
01251             else
01252                if (i && i != 4)
01253                    s[j*8 + i] = cos(i * M_PI/16.0) * sqrt(2.0);
01254                else
01255                    s[j*8 + i] = 1.0;
01256         }
01257     }
01258 
01259     for (i = 0; i < 64; i++)
01260         inv_bink_scan[bink_scan[i]] = i;
01261 
01262     for (j = 0; j < 16; j++) {
01263         for (i = 0; i < 64; i++) {
01264             int k = inv_bink_scan[i];
01265             if (s[i] == 1.0) {
01266                 binkb_intra_quant[j][k] = (1L << 12) * binkb_intra_seed[i] *
01267                                           binkb_num[j]/binkb_den[j];
01268                 binkb_inter_quant[j][k] = (1L << 12) * binkb_inter_seed[i] *
01269                                           binkb_num[j]/binkb_den[j];
01270             } else {
01271                 binkb_intra_quant[j][k] = (1L << 12) * binkb_intra_seed[i] * s[i] *
01272                                           binkb_num[j]/(double)binkb_den[j];
01273                 binkb_inter_quant[j][k] = (1L << 12) * binkb_inter_seed[i] * s[i] *
01274                                           binkb_num[j]/(double)binkb_den[j];
01275             }
01276         }
01277     }
01278 }
01279 
01280 static av_cold int decode_init(AVCodecContext *avctx)
01281 {
01282     BinkContext * const c = avctx->priv_data;
01283     static VLC_TYPE table[16 * 128][2];
01284     static int binkb_initialised = 0;
01285     int i;
01286     int flags;
01287 
01288     c->version = avctx->codec_tag >> 24;
01289     if (avctx->extradata_size < 4) {
01290         av_log(avctx, AV_LOG_ERROR, "Extradata missing or too short\n");
01291         return -1;
01292     }
01293     flags = AV_RL32(avctx->extradata);
01294     c->has_alpha = flags & BINK_FLAG_ALPHA;
01295     c->swap_planes = c->version >= 'h';
01296     if (!bink_trees[15].table) {
01297         for (i = 0; i < 16; i++) {
01298             const int maxbits = bink_tree_lens[i][15];
01299             bink_trees[i].table = table + i*128;
01300             bink_trees[i].table_allocated = 1 << maxbits;
01301             init_vlc(&bink_trees[i], maxbits, 16,
01302                      bink_tree_lens[i], 1, 1,
01303                      bink_tree_bits[i], 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
01304         }
01305     }
01306     c->avctx = avctx;
01307 
01308     c->pic.data[0] = NULL;
01309 
01310     if (av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0) {
01311         return 1;
01312     }
01313 
01314     avctx->pix_fmt = c->has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P;
01315 
01316     avctx->idct_algo = FF_IDCT_BINK;
01317     dsputil_init(&c->dsp, avctx);
01318     ff_init_scantable(c->dsp.idct_permutation, &c->scantable, bink_scan);
01319 
01320     init_bundles(c);
01321 
01322     if (c->version == 'b') {
01323         if (!binkb_initialised) {
01324             binkb_calc_quant();
01325             binkb_initialised = 1;
01326         }
01327     }
01328 
01329     return 0;
01330 }
01331 
01332 static av_cold int decode_end(AVCodecContext *avctx)
01333 {
01334     BinkContext * const c = avctx->priv_data;
01335 
01336     if (c->pic.data[0])
01337         avctx->release_buffer(avctx, &c->pic);
01338     if (c->last.data[0])
01339         avctx->release_buffer(avctx, &c->last);
01340 
01341     free_bundles(c);
01342     return 0;
01343 }
01344 
01345 AVCodec ff_bink_decoder = {
01346     "binkvideo",
01347     AVMEDIA_TYPE_VIDEO,
01348     CODEC_ID_BINKVIDEO,
01349     sizeof(BinkContext),
01350     decode_init,
01351     NULL,
01352     decode_end,
01353     decode_frame,
01354     .long_name = NULL_IF_CONFIG_SMALL("Bink video"),
01355 };

Generated on Wed Apr 11 2012 07:31:32 for FFmpeg by  doxygen 1.7.1