/*
  * Bink video decoder
  * Copyright (c) 2009 Konstantin Shishkov

  * Copyright (C) 2011 Peter Ross <pross@xvid.org>

  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #include "libavutil/attributes.h"

 #include "libavutil/imgutils.h"

 #include "libavutil/internal.h"

 
 #define BITSTREAM_READER_LE

 #include "avcodec.h"
 #include "binkdata.h"

 #include "binkdsp.h"

 #include "blockdsp.h"

 #include "get_bits.h"

 #include "hpeldsp.h"

 #include "internal.h"

 #include "mathops.h"
 

 #define BINK_FLAG_ALPHA 0x00100000
 #define BINK_FLAG_GRAY  0x00020000
 

 static VLC bink_trees[16];
 
 /**

  * IDs for different data types used in old version of Bink video codec
  */
 enum OldSources {
     BINKB_SRC_BLOCK_TYPES = 0, ///< 8x8 block types
     BINKB_SRC_COLORS,          ///< pixel values used for different block types
     BINKB_SRC_PATTERN,         ///< 8-bit values for 2-colour pattern fill
     BINKB_SRC_X_OFF,           ///< X components of motion value
     BINKB_SRC_Y_OFF,           ///< Y components of motion value
     BINKB_SRC_INTRA_DC,        ///< DC values for intrablocks with DCT
     BINKB_SRC_INTER_DC,        ///< DC values for interblocks with DCT
     BINKB_SRC_INTRA_Q,         ///< quantizer values for intrablocks with DCT
     BINKB_SRC_INTER_Q,         ///< quantizer values for interblocks with DCT
     BINKB_SRC_INTER_COEFS,     ///< number of coefficients for residue blocks
 
     BINKB_NB_SRC
 };
 
 static const int binkb_bundle_sizes[BINKB_NB_SRC] = {
     4, 8, 8, 5, 5, 11, 11, 4, 4, 7
 };
 
 static const int binkb_bundle_signed[BINKB_NB_SRC] = {
     0, 0, 0, 1, 1, 0, 1, 0, 0, 0
 };
 

 static int32_t binkb_intra_quant[16][64];
 static int32_t binkb_inter_quant[16][64];

 
 /**

  * IDs for different data types used in Bink video codec
  */
 enum Sources {
     BINK_SRC_BLOCK_TYPES = 0, ///< 8x8 block types
     BINK_SRC_SUB_BLOCK_TYPES, ///< 16x16 block types (a subset of 8x8 block types)
     BINK_SRC_COLORS,          ///< pixel values used for different block types
     BINK_SRC_PATTERN,         ///< 8-bit values for 2-colour pattern fill
     BINK_SRC_X_OFF,           ///< X components of motion value
     BINK_SRC_Y_OFF,           ///< Y components of motion value
     BINK_SRC_INTRA_DC,        ///< DC values for intrablocks with DCT

     BINK_SRC_INTER_DC,        ///< DC values for interblocks with DCT

     BINK_SRC_RUN,             ///< run lengths for special fill block
 
     BINK_NB_SRC
 };
 
 /**
  * data needed to decode 4-bit Huffman-coded value
  */
 typedef struct Tree {
     int     vlc_num;  ///< tree number (in bink_trees[])
     uint8_t syms[16]; ///< leaf value to symbol mapping
 } Tree;
 
 #define GET_HUFF(gb, tree)  (tree).syms[get_vlc2(gb, bink_trees[(tree).vlc_num].table,\
                                                  bink_trees[(tree).vlc_num].bits, 1)]
 
 /**
  * data structure used for decoding single Bink data type
  */
 typedef struct Bundle {
     int     len;       ///< length of number of entries to decode (in bits)
     Tree    tree;      ///< Huffman tree-related data
     uint8_t *data;     ///< buffer for decoded symbols
     uint8_t *data_end; ///< buffer end
     uint8_t *cur_dec;  ///< pointer to the not yet decoded part of the buffer
     uint8_t *cur_ptr;  ///< pointer to the data that is not read from buffer yet
 } Bundle;
 
 /*
  * Decoder context
  */
 typedef struct BinkContext {
     AVCodecContext *avctx;

     BlockDSPContext bdsp;

     HpelDSPContext hdsp;

     BinkDSPContext binkdsp;

     AVFrame        *last;

     int            version;              ///< internal Bink file version

     int            has_alpha;

     int            swap_planes;

     unsigned       frame_num;

     Bundle         bundle[BINKB_NB_SRC]; ///< bundles for decoding all data types

     Tree           col_high[16];         ///< trees for decoding high nibble in "colours" data type
     int            col_lastval;          ///< value of last decoded high nibble in "colours" data type
 } BinkContext;
 
 /**
  * Bink video block types
  */
 enum BlockTypes {
     SKIP_BLOCK = 0, ///< skipped block
     SCALED_BLOCK,   ///< block has size 16x16
     MOTION_BLOCK,   ///< block is copied from previous frame with some offset
     RUN_BLOCK,      ///< block is composed from runs of colours with custom scan order
     RESIDUE_BLOCK,  ///< motion block with some difference added
     INTRA_BLOCK,    ///< intra DCT block
     FILL_BLOCK,     ///< block is filled with single colour
     INTER_BLOCK,    ///< motion block with DCT applied to the difference
     PATTERN_BLOCK,  ///< block is filled with two colours following custom pattern
     RAW_BLOCK,      ///< uncoded 8x8 block
 };
 
 /**

  * Initialize length in all bundles.

  *
  * @param c     decoder context
  * @param width plane width
  * @param bw    plane width in 8x8 blocks
  */
 static void init_lengths(BinkContext *c, int width, int bw)
 {

     width = FFALIGN(width, 8);

     c->bundle[BINK_SRC_BLOCK_TYPES].len = av_log2((width >> 3) + 511) + 1;
 

     c->bundle[BINK_SRC_SUB_BLOCK_TYPES].len = av_log2((width >> 4) + 511) + 1;

     c->bundle[BINK_SRC_COLORS].len = av_log2(bw*64 + 511) + 1;

 
     c->bundle[BINK_SRC_INTRA_DC].len =
     c->bundle[BINK_SRC_INTER_DC].len =
     c->bundle[BINK_SRC_X_OFF].len =
     c->bundle[BINK_SRC_Y_OFF].len = av_log2((width >> 3) + 511) + 1;
 
     c->bundle[BINK_SRC_PATTERN].len = av_log2((bw << 3) + 511) + 1;
 

     c->bundle[BINK_SRC_RUN].len = av_log2(bw*48 + 511) + 1;

 }
 
 /**

  * Allocate memory for bundles.

  *
  * @param c decoder context
  */

 static av_cold int init_bundles(BinkContext *c)

 {
     int bw, bh, blocks;
     int i;
 
     bw = (c->avctx->width  + 7) >> 3;
     bh = (c->avctx->height + 7) >> 3;
     blocks = bw * bh;
 

     for (i = 0; i < BINKB_NB_SRC; i++) {

         c->bundle[i].data = av_mallocz(blocks * 64);

         if (!c->bundle[i].data)
             return AVERROR(ENOMEM);

         c->bundle[i].data_end = c->bundle[i].data + blocks * 64;
     }

 
     return 0;

 }
 
 /**

  * Free memory used by bundles.

  *
  * @param c decoder context
  */
 static av_cold void free_bundles(BinkContext *c)
 {
     int i;

     for (i = 0; i < BINKB_NB_SRC; i++)

         av_freep(&c->bundle[i].data);
 }
 
 /**

  * Merge two consequent lists of equal size depending on bits read.

  *
  * @param gb   context for reading bits
  * @param dst  buffer where merged list will be written to
  * @param src  pointer to the head of the first list (the second lists starts at src+size)
  * @param size input lists size
  */
 static void merge(GetBitContext *gb, uint8_t *dst, uint8_t *src, int size)
 {
     uint8_t *src2 = src + size;
     int size2 = size;
 
     do {
         if (!get_bits1(gb)) {
             *dst++ = *src++;
             size--;
         } else {
             *dst++ = *src2++;
             size2--;
         }
     } while (size && size2);
 
     while (size--)
         *dst++ = *src++;
     while (size2--)
         *dst++ = *src2++;
 }
 
 /**

  * Read information about Huffman tree used to decode data.

  *
  * @param gb   context for reading bits
  * @param tree pointer for storing tree data
  */
 static void read_tree(GetBitContext *gb, Tree *tree)
 {

     uint8_t tmp1[16] = { 0 }, tmp2[16], *in = tmp1, *out = tmp2;

     int i, t, len;
 
     tree->vlc_num = get_bits(gb, 4);
     if (!tree->vlc_num) {
         for (i = 0; i < 16; i++)
             tree->syms[i] = i;
         return;
     }
     if (get_bits1(gb)) {
         len = get_bits(gb, 3);
         for (i = 0; i <= len; i++) {
             tree->syms[i] = get_bits(gb, 4);
             tmp1[tree->syms[i]] = 1;
         }

         for (i = 0; i < 16 && len < 16 - 1; i++)

             if (!tmp1[i])
                 tree->syms[++len] = i;
     } else {
         len = get_bits(gb, 2);
         for (i = 0; i < 16; i++)
             in[i] = i;
         for (i = 0; i <= len; i++) {
             int size = 1 << i;
             for (t = 0; t < 16; t += size << 1)
                 merge(gb, out + t, in + t, size);
             FFSWAP(uint8_t*, in, out);
         }
         memcpy(tree->syms, in, 16);
     }
 }
 
 /**

  * Prepare bundle for decoding data.

  *
  * @param gb          context for reading bits
  * @param c           decoder context
  * @param bundle_num  number of the bundle to initialize
  */
 static void read_bundle(GetBitContext *gb, BinkContext *c, int bundle_num)
 {
     int i;
 
     if (bundle_num == BINK_SRC_COLORS) {
         for (i = 0; i < 16; i++)
             read_tree(gb, &c->col_high[i]);
         c->col_lastval = 0;
     }
     if (bundle_num != BINK_SRC_INTRA_DC && bundle_num != BINK_SRC_INTER_DC)
         read_tree(gb, &c->bundle[bundle_num].tree);
     c->bundle[bundle_num].cur_dec =
     c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
 }
 
 /**
  * common check before starting decoding bundle data
  *
  * @param gb context for reading bits
  * @param b  bundle
  * @param t  variable where number of elements to decode will be stored
  */
 #define CHECK_READ_VAL(gb, b, t) \
     if (!b->cur_dec || (b->cur_dec > b->cur_ptr)) \
         return 0; \
     t = get_bits(gb, b->len); \
     if (!t) { \
         b->cur_dec = NULL; \
         return 0; \
     } \
 
 static int read_runs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
 {
     int t, v;
     const uint8_t *dec_end;
 
     CHECK_READ_VAL(gb, b, t);
     dec_end = b->cur_dec + t;
     if (dec_end > b->data_end) {
         av_log(avctx, AV_LOG_ERROR, "Run value went out of bounds\n");

         return AVERROR_INVALIDDATA;

     }
     if (get_bits1(gb)) {
         v = get_bits(gb, 4);
         memset(b->cur_dec, v, t);
         b->cur_dec += t;
     } else {
         while (b->cur_dec < dec_end)
             *b->cur_dec++ = GET_HUFF(gb, b->tree);
     }
     return 0;
 }
 
 static int read_motion_values(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
 {
     int t, sign, v;
     const uint8_t *dec_end;
 
     CHECK_READ_VAL(gb, b, t);
     dec_end = b->cur_dec + t;
     if (dec_end > b->data_end) {
         av_log(avctx, AV_LOG_ERROR, "Too many motion values\n");

         return AVERROR_INVALIDDATA;

     }
     if (get_bits1(gb)) {
         v = get_bits(gb, 4);
         if (v) {
             sign = -get_bits1(gb);
             v = (v ^ sign) - sign;
         }
         memset(b->cur_dec, v, t);
         b->cur_dec += t;
     } else {

         while (b->cur_dec < dec_end) {

             v = GET_HUFF(gb, b->tree);
             if (v) {
                 sign = -get_bits1(gb);
                 v = (v ^ sign) - sign;
             }
             *b->cur_dec++ = v;

         }

     }
     return 0;
 }
 

 static const uint8_t bink_rlelens[4] = { 4, 8, 12, 32 };

 
 static int read_block_types(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
 {
     int t, v;
     int last = 0;
     const uint8_t *dec_end;
 
     CHECK_READ_VAL(gb, b, t);
     dec_end = b->cur_dec + t;
     if (dec_end > b->data_end) {
         av_log(avctx, AV_LOG_ERROR, "Too many block type values\n");

         return AVERROR_INVALIDDATA;

     }
     if (get_bits1(gb)) {
         v = get_bits(gb, 4);
         memset(b->cur_dec, v, t);
         b->cur_dec += t;
     } else {

         while (b->cur_dec < dec_end) {

             v = GET_HUFF(gb, b->tree);
             if (v < 12) {
                 last = v;
                 *b->cur_dec++ = v;
             } else {
                 int run = bink_rlelens[v - 12];
 

                 if (dec_end - b->cur_dec < run)

                     return AVERROR_INVALIDDATA;

                 memset(b->cur_dec, last, run);
                 b->cur_dec += run;
             }

         }

     }
     return 0;
 }
 
 static int read_patterns(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
 {
     int t, v;
     const uint8_t *dec_end;
 
     CHECK_READ_VAL(gb, b, t);
     dec_end = b->cur_dec + t;
     if (dec_end > b->data_end) {
         av_log(avctx, AV_LOG_ERROR, "Too many pattern values\n");

         return AVERROR_INVALIDDATA;

     }
     while (b->cur_dec < dec_end) {
         v  = GET_HUFF(gb, b->tree);
         v |= GET_HUFF(gb, b->tree) << 4;
         *b->cur_dec++ = v;
     }
 
     return 0;
 }
 
 static int read_colors(GetBitContext *gb, Bundle *b, BinkContext *c)
 {
     int t, sign, v;
     const uint8_t *dec_end;
 
     CHECK_READ_VAL(gb, b, t);
     dec_end = b->cur_dec + t;
     if (dec_end > b->data_end) {
         av_log(c->avctx, AV_LOG_ERROR, "Too many color values\n");

         return AVERROR_INVALIDDATA;

     }
     if (get_bits1(gb)) {
         c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
         v = GET_HUFF(gb, b->tree);
         v = (c->col_lastval << 4) | v;
         if (c->version < 'i') {
             sign = ((int8_t) v) >> 7;
             v = ((v & 0x7F) ^ sign) - sign;
             v += 0x80;
         }
         memset(b->cur_dec, v, t);
         b->cur_dec += t;
     } else {
         while (b->cur_dec < dec_end) {
             c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
             v = GET_HUFF(gb, b->tree);
             v = (c->col_lastval << 4) | v;
             if (c->version < 'i') {
                 sign = ((int8_t) v) >> 7;
                 v = ((v & 0x7F) ^ sign) - sign;
                 v += 0x80;
             }
             *b->cur_dec++ = v;
         }
     }
     return 0;
 }
 
 /** number of bits used to store first DC value in bundle */
 #define DC_START_BITS 11
 
 static int read_dcs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b,
                     int start_bits, int has_sign)
 {
     int i, j, len, len2, bsize, sign, v, v2;

     int16_t *dst     = (int16_t*)b->cur_dec;
     int16_t *dst_end = (int16_t*)b->data_end;

 
     CHECK_READ_VAL(gb, b, len);
     v = get_bits(gb, start_bits - has_sign);
     if (v && has_sign) {
         sign = -get_bits1(gb);
         v = (v ^ sign) - sign;
     }

     if (dst_end - dst < 1)

         return AVERROR_INVALIDDATA;

     *dst++ = v;
     len--;
     for (i = 0; i < len; i += 8) {
         len2 = FFMIN(len - i, 8);

         if (dst_end - dst < len2)

             return AVERROR_INVALIDDATA;

         bsize = get_bits(gb, 4);
         if (bsize) {
             for (j = 0; j < len2; j++) {
                 v2 = get_bits(gb, bsize);
                 if (v2) {
                     sign = -get_bits1(gb);
                     v2 = (v2 ^ sign) - sign;
                 }
                 v += v2;
                 *dst++ = v;
                 if (v < -32768 || v > 32767) {
                     av_log(avctx, AV_LOG_ERROR, "DC value went out of bounds: %d\n", v);

                     return AVERROR_INVALIDDATA;

                 }
             }
         } else {
             for (j = 0; j < len2; j++)
                 *dst++ = v;
         }
     }
 
     b->cur_dec = (uint8_t*)dst;
     return 0;
 }
 
 /**

  * Retrieve next value from bundle.

  *
  * @param c      decoder context
  * @param bundle bundle number
  */
 static inline int get_value(BinkContext *c, int bundle)
 {

     int ret;

 
     if (bundle < BINK_SRC_X_OFF || bundle == BINK_SRC_RUN)
         return *c->bundle[bundle].cur_ptr++;
     if (bundle == BINK_SRC_X_OFF || bundle == BINK_SRC_Y_OFF)
         return (int8_t)*c->bundle[bundle].cur_ptr++;
     ret = *(int16_t*)c->bundle[bundle].cur_ptr;
     c->bundle[bundle].cur_ptr += 2;
     return ret;
 }
 

 static av_cold void binkb_init_bundle(BinkContext *c, int bundle_num)

 {
     c->bundle[bundle_num].cur_dec =
     c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
     c->bundle[bundle_num].len = 13;
 }
 

 static av_cold void binkb_init_bundles(BinkContext *c)

 {
     int i;
     for (i = 0; i < BINKB_NB_SRC; i++)
         binkb_init_bundle(c, i);
 }
 
 static int binkb_read_bundle(BinkContext *c, GetBitContext *gb, int bundle_num)
 {
     const int bits = binkb_bundle_sizes[bundle_num];
     const int mask = 1 << (bits - 1);
     const int issigned = binkb_bundle_signed[bundle_num];
     Bundle *b = &c->bundle[bundle_num];
     int i, len;
 
     CHECK_READ_VAL(gb, b, len);

     if (b->data_end - b->cur_dec < len * (1 + (bits > 8)))

         return AVERROR_INVALIDDATA;

     if (bits <= 8) {
         if (!issigned) {
             for (i = 0; i < len; i++)
                 *b->cur_dec++ = get_bits(gb, bits);
         } else {
             for (i = 0; i < len; i++)
                 *b->cur_dec++ = get_bits(gb, bits) - mask;
         }
     } else {
         int16_t *dst = (int16_t*)b->cur_dec;
 
         if (!issigned) {
             for (i = 0; i < len; i++)
                 *dst++ = get_bits(gb, bits);
         } else {
             for (i = 0; i < len; i++)
                 *dst++ = get_bits(gb, bits) - mask;
         }
         b->cur_dec = (uint8_t*)dst;
     }
     return 0;
 }
 
 static inline int binkb_get_value(BinkContext *c, int bundle_num)
 {
     int16_t ret;
     const int bits = binkb_bundle_sizes[bundle_num];
 
     if (bits <= 8) {
         int val = *c->bundle[bundle_num].cur_ptr++;
         return binkb_bundle_signed[bundle_num] ? (int8_t)val : val;
     }
     ret = *(int16_t*)c->bundle[bundle_num].cur_ptr;
     c->bundle[bundle_num].cur_ptr += 2;
     return ret;
 }
 

 /**

  * Read 8x8 block of DCT coefficients.

  *
  * @param gb       context for reading bits
  * @param block    place for storing coefficients
  * @param scan     scan order table

  * @param quant_matrices quantization matrices

  * @return 0 for success, negative value in other cases
  */

 static int read_dct_coeffs(GetBitContext *gb, int32_t block[64], const uint8_t *scan,
                            const int32_t quant_matrices[16][64], int q)

 {
     int coef_list[128];
     int mode_list[128];

     int i, t, bits, ccoef, mode, sign;

     int list_start = 64, list_end = 64, list_pos;
     int coef_count = 0;
     int coef_idx[64];
     int quant_idx;

     const int32_t *quant;

 
     coef_list[list_end] = 4;  mode_list[list_end++] = 0;
     coef_list[list_end] = 24; mode_list[list_end++] = 0;
     coef_list[list_end] = 44; mode_list[list_end++] = 0;
     coef_list[list_end] = 1;  mode_list[list_end++] = 3;
     coef_list[list_end] = 2;  mode_list[list_end++] = 3;
     coef_list[list_end] = 3;  mode_list[list_end++] = 3;
 

     for (bits = get_bits(gb, 4) - 1; bits >= 0; bits--) {

         list_pos = list_start;
         while (list_pos < list_end) {
             if (!(mode_list[list_pos] | coef_list[list_pos]) || !get_bits1(gb)) {
                 list_pos++;
                 continue;
             }
             ccoef = coef_list[list_pos];
             mode  = mode_list[list_pos];
             switch (mode) {
             case 0:
                 coef_list[list_pos] = ccoef + 4;
                 mode_list[list_pos] = 1;
             case 2:
                 if (mode == 2) {
                     coef_list[list_pos]   = 0;
                     mode_list[list_pos++] = 0;
                 }
                 for (i = 0; i < 4; i++, ccoef++) {
                     if (get_bits1(gb)) {
                         coef_list[--list_start] = ccoef;
                         mode_list[  list_start] = 3;
                     } else {
                         if (!bits) {
                             t = 1 - (get_bits1(gb) << 1);
                         } else {

                             t = get_bits(gb, bits) | 1 << bits;

                             sign = -get_bits1(gb);
                             t = (t ^ sign) - sign;
                         }
                         block[scan[ccoef]] = t;
                         coef_idx[coef_count++] = ccoef;
                     }
                 }
                 break;
             case 1:
                 mode_list[list_pos] = 2;
                 for (i = 0; i < 3; i++) {
                     ccoef += 4;
                     coef_list[list_end]   = ccoef;
                     mode_list[list_end++] = 2;
                 }
                 break;
             case 3:
                 if (!bits) {
                     t = 1 - (get_bits1(gb) << 1);
                 } else {

                     t = get_bits(gb, bits) | 1 << bits;

                     sign = -get_bits1(gb);
                     t = (t ^ sign) - sign;
                 }
                 block[scan[ccoef]] = t;
                 coef_idx[coef_count++] = ccoef;
                 coef_list[list_pos]   = 0;
                 mode_list[list_pos++] = 0;
                 break;
             }
         }
     }
 

     if (q == -1) {
         quant_idx = get_bits(gb, 4);
     } else {
         quant_idx = q;

         if (quant_idx > 15U) {

             av_log(NULL, AV_LOG_ERROR, "quant_index %d out of range\n", quant_idx);

             return AVERROR_INVALIDDATA;
         }

     }
 

     quant = quant_matrices[quant_idx];

     block[0] = (block[0] * quant[0]) >> 11;

     for (i = 0; i < coef_count; i++) {
         int idx = coef_idx[i];

         block[scan[idx]] = (block[scan[idx]] * quant[idx]) >> 11;

     }
 
     return 0;
 }
 
 /**

  * Read 8x8 block with residue after motion compensation.

  *
  * @param gb          context for reading bits
  * @param block       place to store read data
  * @param masks_count number of masks to decode
  * @return 0 on success, negative value in other cases
  */

 static int read_residue(GetBitContext *gb, int16_t block[64], int masks_count)

 {
     int coef_list[128];
     int mode_list[128];
     int i, sign, mask, ccoef, mode;
     int list_start = 64, list_end = 64, list_pos;
     int nz_coeff[64];
     int nz_coeff_count = 0;
 
     coef_list[list_end] =  4; mode_list[list_end++] = 0;
     coef_list[list_end] = 24; mode_list[list_end++] = 0;
     coef_list[list_end] = 44; mode_list[list_end++] = 0;
     coef_list[list_end] =  0; mode_list[list_end++] = 2;
 
     for (mask = 1 << get_bits(gb, 3); mask; mask >>= 1) {
         for (i = 0; i < nz_coeff_count; i++) {
             if (!get_bits1(gb))
                 continue;
             if (block[nz_coeff[i]] < 0)
                 block[nz_coeff[i]] -= mask;
             else
                 block[nz_coeff[i]] += mask;
             masks_count--;
             if (masks_count < 0)
                 return 0;
         }
         list_pos = list_start;
         while (list_pos < list_end) {
             if (!(coef_list[list_pos] | mode_list[list_pos]) || !get_bits1(gb)) {
                 list_pos++;
                 continue;
             }
             ccoef = coef_list[list_pos];
             mode  = mode_list[list_pos];
             switch (mode) {
             case 0:
                 coef_list[list_pos] = ccoef + 4;
                 mode_list[list_pos] = 1;
             case 2:
                 if (mode == 2) {
                     coef_list[list_pos]   = 0;
                     mode_list[list_pos++] = 0;
                 }
                 for (i = 0; i < 4; i++, ccoef++) {
                     if (get_bits1(gb)) {
                         coef_list[--list_start] = ccoef;
                         mode_list[  list_start] = 3;
                     } else {
                         nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
                         sign = -get_bits1(gb);
                         block[bink_scan[ccoef]] = (mask ^ sign) - sign;
                         masks_count--;
                         if (masks_count < 0)
                             return 0;
                     }
                 }
                 break;
             case 1:
                 mode_list[list_pos] = 2;
                 for (i = 0; i < 3; i++) {
                     ccoef += 4;
                     coef_list[list_end]   = ccoef;
                     mode_list[list_end++] = 2;
                 }
                 break;
             case 3:
                 nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
                 sign = -get_bits1(gb);
                 block[bink_scan[ccoef]] = (mask ^ sign) - sign;
                 coef_list[list_pos]   = 0;
                 mode_list[list_pos++] = 0;
                 masks_count--;
                 if (masks_count < 0)
                     return 0;
                 break;
             }
         }
     }
 
     return 0;
 }
 

 /**
  * Copy 8x8 block from source to destination, where src and dst may be overlapped
  */
 static inline void put_pixels8x8_overlapped(uint8_t *dst, uint8_t *src, int stride)
 {
     uint8_t tmp[64];
     int i;
     for (i = 0; i < 8; i++)
         memcpy(tmp + i*8, src + i*stride, 8);
     for (i = 0; i < 8; i++)
         memcpy(dst + i*stride, tmp + i*8, 8);
 }
 

 static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
                               int plane_idx, int is_key, int is_chroma)

 {

     int blk, ret;

     int i, j, bx, by;
     uint8_t *dst, *ref, *ref_start, *ref_end;
     int v, col[2];
     const uint8_t *scan;
     int xoff, yoff;

     LOCAL_ALIGNED_32(int16_t, block, [64]);

     LOCAL_ALIGNED_16(int32_t, dctblock, [64]);

     int coordmap[64];
     int ybias = is_key ? -15 : 0;
     int qp;
 

     const int stride = frame->linesize[plane_idx];

     int bw = is_chroma ? (c->avctx->width  + 15) >> 4 : (c->avctx->width  + 7) >> 3;
     int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
 
     binkb_init_bundles(c);

     ref_start = frame->data[plane_idx];
     ref_end   = frame->data[plane_idx] + (bh * frame->linesize[plane_idx] + bw) * 8;

 
     for (i = 0; i < 64; i++)
         coordmap[i] = (i & 7) + (i >> 3) * stride;
 
     for (by = 0; by < bh; by++) {
         for (i = 0; i < BINKB_NB_SRC; i++) {

             if ((ret = binkb_read_bundle(c, gb, i)) < 0)
                 return ret;

         }
 

         dst  = frame->data[plane_idx]  + 8*by*stride;

         for (bx = 0; bx < bw; bx++, dst += 8) {
             blk = binkb_get_value(c, BINKB_SRC_BLOCK_TYPES);
             switch (blk) {
             case 0:
                 break;
             case 1:
                 scan = bink_patterns[get_bits(gb, 4)];
                 i = 0;
                 do {
                     int mode, run;
 
                     mode = get_bits1(gb);
                     run = get_bits(gb, binkb_runbits[i]) + 1;
 
                     i += run;
                     if (i > 64) {
                         av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");

                         return AVERROR_INVALIDDATA;

                     }
                     if (mode) {
                         v = binkb_get_value(c, BINKB_SRC_COLORS);
                         for (j = 0; j < run; j++)
                             dst[coordmap[*scan++]] = v;
                     } else {
                         for (j = 0; j < run; j++)
                             dst[coordmap[*scan++]] = binkb_get_value(c, BINKB_SRC_COLORS);
                     }
                 } while (i < 63);
                 if (i == 63)
                     dst[coordmap[*scan++]] = binkb_get_value(c, BINKB_SRC_COLORS);
                 break;
             case 2:

                 memset(dctblock, 0, sizeof(*dctblock) * 64);
                 dctblock[0] = binkb_get_value(c, BINKB_SRC_INTRA_DC);

                 qp = binkb_get_value(c, BINKB_SRC_INTRA_Q);

                 read_dct_coeffs(gb, dctblock, bink_scan, (const int32_t (*)[64])binkb_intra_quant, qp);

                 c->binkdsp.idct_put(dst, stride, dctblock);

                 break;
             case 3:
                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
                 ref = dst + xoff + yoff * stride;
                 if (ref < ref_start || ref + 8*stride > ref_end) {
                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {

                     c->hdsp.put_pixels_tab[1][0](dst, ref, stride, 8);

                 } else {
                     put_pixels8x8_overlapped(dst, ref, stride);
                 }

                 c->bdsp.clear_block(block);

                 v = binkb_get_value(c, BINKB_SRC_INTER_COEFS);
                 read_residue(gb, block, v);

                 c->binkdsp.add_pixels8(dst, block, stride);

                 break;
             case 4:
                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
                 ref = dst + xoff + yoff * stride;
                 if (ref < ref_start || ref + 8 * stride > ref_end) {
                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {

                     c->hdsp.put_pixels_tab[1][0](dst, ref, stride, 8);

                 } else {
                     put_pixels8x8_overlapped(dst, ref, stride);
                 }

                 memset(dctblock, 0, sizeof(*dctblock) * 64);
                 dctblock[0] = binkb_get_value(c, BINKB_SRC_INTER_DC);

                 qp = binkb_get_value(c, BINKB_SRC_INTER_Q);

                 read_dct_coeffs(gb, dctblock, bink_scan, (const int32_t (*)[64])binkb_inter_quant, qp);

                 c->binkdsp.idct_add(dst, stride, dctblock);

                 break;
             case 5:
                 v = binkb_get_value(c, BINKB_SRC_COLORS);

                 c->bdsp.fill_block_tab[1](dst, v, stride, 8);

                 break;
             case 6:
                 for (i = 0; i < 2; i++)
                     col[i] = binkb_get_value(c, BINKB_SRC_COLORS);
                 for (i = 0; i < 8; i++) {
                     v = binkb_get_value(c, BINKB_SRC_PATTERN);
                     for (j = 0; j < 8; j++, v >>= 1)
                         dst[i*stride + j] = col[v & 1];
                 }
                 break;
             case 7:
                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
                 ref = dst + xoff + yoff * stride;
                 if (ref < ref_start || ref + 8 * stride > ref_end) {
                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {

                     c->hdsp.put_pixels_tab[1][0](dst, ref, stride, 8);

                 } else {
                     put_pixels8x8_overlapped(dst, ref, stride);
                 }
                 break;
             case 8:
                 for (i = 0; i < 8; i++)
                     memcpy(dst + i*stride, c->bundle[BINKB_SRC_COLORS].cur_ptr + i*8, 8);
                 c->bundle[BINKB_SRC_COLORS].cur_ptr += 64;
                 break;
             default:
                 av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);

                 return AVERROR_INVALIDDATA;

             }
         }
     }
     if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
         skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
 
     return 0;
 }
 

 static int bink_put_pixels(BinkContext *c,
                            uint8_t *dst, uint8_t *prev, int stride,
                            uint8_t *ref_start,
                            uint8_t *ref_end)
 {
     int xoff     = get_value(c, BINK_SRC_X_OFF);
     int yoff     = get_value(c, BINK_SRC_Y_OFF);
     uint8_t *ref = prev + xoff + yoff * stride;
     if (ref < ref_start || ref > ref_end) {
         av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
                xoff, yoff);
         return AVERROR_INVALIDDATA;
     }
     c->hdsp.put_pixels_tab[1][0](dst, ref, stride, 8);
 
     return 0;
 }
 

 static int bink_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
                              int plane_idx, int is_chroma)

 {

     int blk, ret;

     int i, j, bx, by;

     uint8_t *dst, *prev, *ref_start, *ref_end;

     int v, col[2];
     const uint8_t *scan;

     LOCAL_ALIGNED_32(int16_t, block, [64]);

     LOCAL_ALIGNED_16(uint8_t, ublock, [64]);

     LOCAL_ALIGNED_16(int32_t, dctblock, [64]);

     int coordmap[64];
 

     const int stride = frame->linesize[plane_idx];

     int bw = is_chroma ? (c->avctx->width  + 15) >> 4 : (c->avctx->width  + 7) >> 3;
     int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
     int width = c->avctx->width >> is_chroma;

     init_lengths(c, FFMAX(width, 8), bw);
     for (i = 0; i < BINK_NB_SRC; i++)
         read_bundle(gb, c, i);
 

     ref_start = c->last->data[plane_idx] ? c->last->data[plane_idx]

                                          : frame->data[plane_idx];

     ref_end   = ref_start

                 + (bw - 1 + c->last->linesize[plane_idx] * (bh - 1)) * 8;

 
     for (i = 0; i < 64; i++)
         coordmap[i] = (i & 7) + (i >> 3) * stride;
 
     for (by = 0; by < bh; by++) {

         if ((ret = read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_BLOCK_TYPES])) < 0)
             return ret;
         if ((ret = read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_SUB_BLOCK_TYPES])) < 0)
             return ret;
         if ((ret = read_colors(gb, &c->bundle[BINK_SRC_COLORS], c)) < 0)
             return ret;
         if ((ret = read_patterns(c->avctx, gb, &c->bundle[BINK_SRC_PATTERN])) < 0)
             return ret;
         if ((ret = read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_X_OFF])) < 0)
             return ret;
         if ((ret = read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_Y_OFF])) < 0)
             return ret;
         if ((ret = read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTRA_DC], DC_START_BITS, 0)) < 0)
             return ret;
         if ((ret = read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTER_DC], DC_START_BITS, 1)) < 0)
             return ret;
         if ((ret = read_runs(c->avctx, gb, &c->bundle[BINK_SRC_RUN])) < 0)
             return ret;

 
         if (by == bh)
             break;

         dst  = frame->data[plane_idx]  + 8*by*stride;

         prev = (c->last->data[plane_idx] ? c->last->data[plane_idx]

                                          : frame->data[plane_idx]) + 8*by*stride;

         for (bx = 0; bx < bw; bx++, dst += 8, prev += 8) {
             blk = get_value(c, BINK_SRC_BLOCK_TYPES);
             // 16x16 block type on odd line means part of the already decoded block, so skip it
             if ((by & 1) && blk == SCALED_BLOCK) {
                 bx++;
                 dst  += 8;
                 prev += 8;
                 continue;
             }
             switch (blk) {
             case SKIP_BLOCK:

                 c->hdsp.put_pixels_tab[1][0](dst, prev, stride, 8);

                 break;

             case SCALED_BLOCK:
                 blk = get_value(c, BINK_SRC_SUB_BLOCK_TYPES);

                 switch (blk) {
                 case RUN_BLOCK:

                     scan = bink_patterns[get_bits(gb, 4)];

                     i = 0;
                     do {
                         int run = get_value(c, BINK_SRC_RUN) + 1;
 
                         i += run;
                         if (i > 64) {

                             av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");

                             return AVERROR_INVALIDDATA;

                         }

                         if (get_bits1(gb)) {

                             v = get_value(c, BINK_SRC_COLORS);
                             for (j = 0; j < run; j++)

                                 ublock[*scan++] = v;

                         } else {
                             for (j = 0; j < run; j++)

                                 ublock[*scan++] = get_value(c, BINK_SRC_COLORS);

                         }
                     } while (i < 63);
                     if (i == 63)

                         ublock[*scan++] = get_value(c, BINK_SRC_COLORS);

                     break;
                 case INTRA_BLOCK:

                     memset(dctblock, 0, sizeof(*dctblock) * 64);
                     dctblock[0] = get_value(c, BINK_SRC_INTRA_DC);
                     read_dct_coeffs(gb, dctblock, bink_scan, bink_intra_quant, -1);

                     c->binkdsp.idct_put(ublock, 8, dctblock);

                     break;
                 case FILL_BLOCK:
                     v = get_value(c, BINK_SRC_COLORS);

                     c->bdsp.fill_block_tab[0](dst, v, stride, 16);

                     break;
                 case PATTERN_BLOCK:
                     for (i = 0; i < 2; i++)
                         col[i] = get_value(c, BINK_SRC_COLORS);

                     for (j = 0; j < 8; j++) {

                         v = get_value(c, BINK_SRC_PATTERN);

                         for (i = 0; i < 8; i++, v >>= 1)
                             ublock[i + j*8] = col[v & 1];

                     }
                     break;
                 case RAW_BLOCK:

                     for (j = 0; j < 8; j++)
                         for (i = 0; i < 8; i++)
                             ublock[i + j*8] = get_value(c, BINK_SRC_COLORS);

                     break;
                 default:

                     av_log(c->avctx, AV_LOG_ERROR, "Incorrect 16x16 block type %d\n", blk);

                     return AVERROR_INVALIDDATA;

                 }
                 if (blk != FILL_BLOCK)

                 c->binkdsp.scale_block(ublock, dst, stride);

                 bx++;
                 dst  += 8;
                 prev += 8;
                 break;
             case MOTION_BLOCK:

                 ret = bink_put_pixels(c, dst, prev, stride,
                                       ref_start, ref_end);
                 if (ret < 0)
                     return ret;

                 break;
             case RUN_BLOCK:
                 scan = bink_patterns[get_bits(gb, 4)];
                 i = 0;
                 do {
                     int run = get_value(c, BINK_SRC_RUN) + 1;
 
                     i += run;
                     if (i > 64) {
                         av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");

                         return AVERROR_INVALIDDATA;

                     }
                     if (get_bits1(gb)) {
                         v = get_value(c, BINK_SRC_COLORS);
                         for (j = 0; j < run; j++)
                             dst[coordmap[*scan++]] = v;
                     } else {
                         for (j = 0; j < run; j++)
                             dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
                     }
                 } while (i < 63);
                 if (i == 63)
                     dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
                 break;
             case RESIDUE_BLOCK:

                 ret = bink_put_pixels(c, dst, prev, stride,
                                       ref_start, ref_end);
                 if (ret < 0)
                     return ret;

                 c->bdsp.clear_block(block);

                 v = get_bits(gb, 7);
                 read_residue(gb, block, v);

                 c->binkdsp.add_pixels8(dst, block, stride);

                 break;
             case INTRA_BLOCK:

                 memset(dctblock, 0, sizeof(*dctblock) * 64);
                 dctblock[0] = get_value(c, BINK_SRC_INTRA_DC);
                 read_dct_coeffs(gb, dctblock, bink_scan, bink_intra_quant, -1);

                 c->binkdsp.idct_put(dst, stride, dctblock);

                 break;
             case FILL_BLOCK:
                 v = get_value(c, BINK_SRC_COLORS);

                 c->bdsp.fill_block_tab[1](dst, v, stride, 8);

                 break;
             case INTER_BLOCK:

                 ret = bink_put_pixels(c, dst, prev, stride,
                                       ref_start, ref_end);
                 if (ret < 0)
                     return ret;

                 memset(dctblock, 0, sizeof(*dctblock) * 64);
                 dctblock[0] = get_value(c, BINK_SRC_INTER_DC);
                 read_dct_coeffs(gb, dctblock, bink_scan, bink_inter_quant, -1);

                 c->binkdsp.idct_add(dst, stride, dctblock);

                 break;
             case PATTERN_BLOCK:
                 for (i = 0; i < 2; i++)
                     col[i] = get_value(c, BINK_SRC_COLORS);
                 for (i = 0; i < 8; i++) {
                     v = get_value(c, BINK_SRC_PATTERN);
                     for (j = 0; j < 8; j++, v >>= 1)
                         dst[i*stride + j] = col[v & 1];
                 }
                 break;
             case RAW_BLOCK:
                 for (i = 0; i < 8; i++)
                     memcpy(dst + i*stride, c->bundle[BINK_SRC_COLORS].cur_ptr + i*8, 8);
                 c->bundle[BINK_SRC_COLORS].cur_ptr += 64;
                 break;
             default:
                 av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);

                 return AVERROR_INVALIDDATA;

             }
         }

     }
     if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
         skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));

 
     return 0;
 }
 

 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt)

 {
     BinkContext * const c = avctx->priv_data;

     AVFrame *frame = data;

     GetBitContext gb;

     int plane, plane_idx, ret;

     int bits_count = pkt->size << 3;
 

     if (c->version > 'b') {

         if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)

             return ret;

     } else {

         if ((ret = ff_reget_buffer(avctx, c->last)) < 0)

             return ret;

         if ((ret = av_frame_ref(frame, c->last)) < 0)
             return ret;

     }

 
     init_get_bits(&gb, pkt->data, bits_count);
     if (c->has_alpha) {

         if (c->version >= 'i')
             skip_bits_long(&gb, 32);

         if ((ret = bink_decode_plane(c, frame, &gb, 3, 0)) < 0)

             return ret;

     }
     if (c->version >= 'i')
         skip_bits_long(&gb, 32);
 

     c->frame_num++;
 

     for (plane = 0; plane < 3; plane++) {
         plane_idx = (!plane || !c->swap_planes) ? plane : (plane ^ 3);
 

         if (c->version > 'b') {

             if ((ret = bink_decode_plane(c, frame, &gb, plane_idx, !!plane)) < 0)

                 return ret;

         } else {

             if ((ret = binkb_decode_plane(c, frame, &gb, plane_idx,

                                           c->frame_num == 1, !!plane)) < 0)

                 return ret;

         }

         if (get_bits_count(&gb) >= bits_count)
             break;

     }
     emms_c();
 

     if (c->version > 'b') {
         av_frame_unref(c->last);
         if ((ret = av_frame_ref(c->last, frame)) < 0)
             return ret;
     }

     *got_frame = 1;

 
     /* always report that the buffer was completely consumed */
     return pkt->size;
 }
 

 /**

  * Calculate quantization tables for version b

  */

 static av_cold void binkb_calc_quant(void)

 {

     uint8_t inv_bink_scan[64];

     static const int s[64]={
         1073741824,1489322693,1402911301,1262586814,1073741824, 843633538, 581104888, 296244703,
         1489322693,2065749918,1945893874,1751258219,1489322693,1170153332, 806015634, 410903207,
         1402911301,1945893874,1832991949,1649649171,1402911301,1102260336, 759250125, 387062357,
         1262586814,1751258219,1649649171,1484645031,1262586814, 992008094, 683307060, 348346918,
         1073741824,1489322693,1402911301,1262586814,1073741824, 843633538, 581104888, 296244703,
          843633538,1170153332,1102260336, 992008094, 843633538, 662838617, 456571181, 232757969,
          581104888, 806015634, 759250125, 683307060, 581104888, 456571181, 314491699, 160326478,
          296244703, 410903207, 387062357, 348346918, 296244703, 232757969, 160326478,  81733730,
     };

     int i, j;

 #define C (1LL<<30)

     for (i = 0; i < 64; i++)
         inv_bink_scan[bink_scan[i]] = i;
 

     for (j = 0; j < 16; j++) {
         for (i = 0; i < 64; i++) {

             int k = inv_bink_scan[i];

             binkb_intra_quant[j][k] = binkb_intra_seed[i] * (int64_t)s[i] *
                                         binkb_num[j]/(binkb_den[j] * (C>>12));
             binkb_inter_quant[j][k] = binkb_inter_seed[i] * (int64_t)s[i] *
                                         binkb_num[j]/(binkb_den[j] * (C>>12));

         }
     }
 }
 

 static av_cold int decode_init(AVCodecContext *avctx)
 {
     BinkContext * const c = avctx->priv_data;
     static VLC_TYPE table[16 * 128][2];

     static int binkb_initialised = 0;

     int i, ret;

     int flags;

 
     c->version = avctx->codec_tag >> 24;

     if (avctx->extradata_size < 4) {
         av_log(avctx, AV_LOG_ERROR, "Extradata missing or too short\n");

         return AVERROR_INVALIDDATA;

     }
     flags = AV_RL32(avctx->extradata);
     c->has_alpha = flags & BINK_FLAG_ALPHA;

     c->swap_planes = c->version >= 'h';

     if (!bink_trees[15].table) {
         for (i = 0; i < 16; i++) {
             const int maxbits = bink_tree_lens[i][15];
             bink_trees[i].table = table + i*128;
             bink_trees[i].table_allocated = 1 << maxbits;
             init_vlc(&bink_trees[i], maxbits, 16,
                      bink_tree_lens[i], 1, 1,
                      bink_tree_bits[i], 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
         }
     }
     c->avctx = avctx;
 

     c->last = av_frame_alloc();
     if (!c->last)

         return AVERROR(ENOMEM);

     if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
         return ret;
 

     avctx->pix_fmt = c->has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;

     ff_blockdsp_init(&c->bdsp, avctx);

     ff_hpeldsp_init(&c->hdsp, avctx->flags);

     ff_binkdsp_init(&c->binkdsp);

     if ((ret = init_bundles(c)) < 0) {
         free_bundles(c);
         return ret;
     }

     if (c->version == 'b') {
         if (!binkb_initialised) {
             binkb_calc_quant();
             binkb_initialised = 1;
         }
     }
 

     return 0;
 }
 
 static av_cold int decode_end(AVCodecContext *avctx)
 {
     BinkContext * const c = avctx->priv_data;
 

     av_frame_free(&c->last);

 
     free_bundles(c);
     return 0;
 }
 

 static void flush(AVCodecContext *avctx)
 {
     BinkContext * const c = avctx->priv_data;
 
     c->frame_num = 0;
 }
 

 AVCodec ff_bink_decoder = {

     .name           = "binkvideo",

     .long_name      = NULL_IF_CONFIG_SMALL("Bink video"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_BINKVIDEO,

     .priv_data_size = sizeof(BinkContext),
     .init           = decode_init,
     .close          = decode_end,
     .decode         = decode_frame,

     .flush          = flush,

     .capabilities   = AV_CODEC_CAP_DR1,

 };