diff options
author | Kostya Shishkov <kostya.shishkov@gmail.com> | 2010-02-21 16:28:46 +0300 |
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committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2010-02-21 16:28:46 +0300 |
commit | 342c7dfdbb46b1ff778ef142dc93d24990e776d7 (patch) | |
tree | 08036ef506a3461982d15e5d12c523d1ec8f4a12 /libavcodec/bink.c | |
parent | 336ce917e6e6adb10ee44945684c67cdea65e228 (diff) |
Bink video decoder
Originally committed as revision 21937 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/bink.c')
-rw-r--r-- | libavcodec/bink.c | 979 |
1 files changed, 979 insertions, 0 deletions
diff --git a/libavcodec/bink.c b/libavcodec/bink.c new file mode 100644 index 0000000000..3e8f15fb8d --- /dev/null +++ b/libavcodec/bink.c @@ -0,0 +1,979 @@ +/* + * Bink video decoder + * Copyright (c) 2009 Konstantin Shishkov + * + * 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 "avcodec.h" +#include "dsputil.h" +#include "binkdata.h" +#include "mathops.h" + +#define ALT_BITSTREAM_READER_LE +#include "get_bits.h" + +static VLC bink_trees[16]; + +/** + * 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 intrablocks 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; + DSPContext dsp; + AVFrame pic, last; + int version; ///< internal Bink file version + int swap_planes; + ScanTable scantable; ///< permutated scantable for DCT coeffs decoding + + Bundle bundle[BINK_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 +}; + +/** + * Initializes length 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) +{ + 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((width >> 3)*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((width >> 3)*48 + 511) + 1; +} + +/** + * Allocates memory for bundles. + * + * @param c decoder context + */ +static av_cold void 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 < BINK_NB_SRC; i++) { + c->bundle[i].data = av_malloc(blocks * 64); + c->bundle[i].data_end = c->bundle[i].data + blocks * 64; + } +} + +/** + * Frees memory used by bundles. + * + * @param c decoder context + */ +static av_cold void free_bundles(BinkContext *c) +{ + int i; + for (i = 0; i < BINK_NB_SRC; i++) + av_freep(&c->bundle[i].data); +} + +/** + * Merges 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++; +} + +/** + * Reads 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], 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); + memset(tmp1, 0, sizeof(tmp1)); + for (i = 0; i <= len; i++) { + tree->syms[i] = get_bits(gb, 4); + tmp1[tree->syms[i]] = 1; + } + for (i = 0; i < 16; 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); + } +} + +/** + * Prepares 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 -1; + } + 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 -1; + } + 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 { + do { + v = GET_HUFF(gb, b->tree); + if (v) { + sign = -get_bits1(gb); + v = (v ^ sign) - sign; + } + *b->cur_dec++ = v; + } while (b->cur_dec < dec_end); + } + return 0; +} + +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 -1; + } + if (get_bits1(gb)) { + v = get_bits(gb, 4); + memset(b->cur_dec, v, t); + b->cur_dec += t; + } else { + do { + v = GET_HUFF(gb, b->tree); + if (v < 12) { + last = v; + *b->cur_dec++ = v; + } else { + int run = bink_rlelens[v - 12]; + + memset(b->cur_dec, last, run); + b->cur_dec += run; + } + } while (b->cur_dec < dec_end); + } + 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 -1; + } + 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 -1; + } + 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; + + 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; + } + *dst++ = v; + len--; + for (i = 0; i < len; i += 8) { + len2 = FFMIN(len - i, 8); + 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 -1; + } + } + } else { + for (j = 0; j < len2; j++) + *dst++ = v; + } + } + + b->cur_dec = (uint8_t*)dst; + return 0; +} + +/** + * Retrieves next value from bundle. + * + * @param c decoder context + * @param bundle bundle number + */ +static inline int get_value(BinkContext *c, int bundle) +{ + int16_t 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; +} + +/** + * Reads 8x8 block of DCT coefficients. + * + * @param gb context for reading bits + * @param block place for storing coefficients + * @param scan scan order table + * @param is_intra tells what set of quantizer matrices to use + * @return 0 for success, negative value in other cases + */ +static int read_dct_coeffs(GetBitContext *gb, DCTELEM block[64], const uint8_t *scan, + int is_intra) +{ + int coef_list[128]; + int mode_list[128]; + int i, t, mask, 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 uint32_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; + + bits = get_bits(gb, 4) - 1; + for (mask = 1 << bits; bits >= 0; mask >>= 1, 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 { + int t; + if (!bits) { + t = 1 - (get_bits1(gb) << 1); + } else { + t = get_bits(gb, bits) | mask; + 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) | mask; + 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; + } + } + } + + quant_idx = get_bits(gb, 4); + quant = is_intra ? bink_intra_quant[quant_idx] + : bink_inter_quant[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; +} + +/** + * Reads 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, DCTELEM 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; +} + +static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt) +{ + BinkContext * const c = avctx->priv_data; + GetBitContext gb; + int blk; + int i, j, plane, plane_idx, bx, by; + uint8_t *dst, *prev, *ref, *ref_start, *ref_end; + int v, col[2]; + const uint8_t *scan; + int xoff, yoff; + DECLARE_ALIGNED_16(DCTELEM, block[64]); + DECLARE_ALIGNED_16(uint8_t, ublock[64]); + int coordmap[64]; + + if(c->pic.data[0]) + avctx->release_buffer(avctx, &c->pic); + + if(avctx->get_buffer(avctx, &c->pic) < 0){ + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; + } + + init_get_bits(&gb, pkt->data, pkt->size*8); + if (c->version >= 'i') + skip_bits_long(&gb, 32); + + for (plane = 0; plane < 3; plane++) { + const int stride = c->pic.linesize[plane]; + int bw = plane ? (avctx->width + 15) >> 4 : (avctx->width + 7) >> 3; + int bh = plane ? (avctx->height + 15) >> 4 : (avctx->height + 7) >> 3; + + init_lengths(c, avctx->width >> !!plane, bw); + for (i = 0; i < BINK_NB_SRC; i++) + read_bundle(&gb, c, i); + + plane_idx = (!plane || !c->swap_planes) ? plane : (plane ^ 3); + ref_start = c->last.data[plane_idx]; + ref_end = c->last.data[plane_idx] + + (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 (read_block_types(avctx, &gb, &c->bundle[BINK_SRC_BLOCK_TYPES]) < 0) + return -1; + if (read_block_types(avctx, &gb, &c->bundle[BINK_SRC_SUB_BLOCK_TYPES]) < 0) + return -1; + if (read_colors(&gb, &c->bundle[BINK_SRC_COLORS], c) < 0) + return -1; + if (read_patterns(avctx, &gb, &c->bundle[BINK_SRC_PATTERN]) < 0) + return -1; + if (read_motion_values(avctx, &gb, &c->bundle[BINK_SRC_X_OFF]) < 0) + return -1; + if (read_motion_values(avctx, &gb, &c->bundle[BINK_SRC_Y_OFF]) < 0) + return -1; + if (read_dcs(avctx, &gb, &c->bundle[BINK_SRC_INTRA_DC], DC_START_BITS, 0) < 0) + return -1; + if (read_dcs(avctx, &gb, &c->bundle[BINK_SRC_INTER_DC], DC_START_BITS, 1) < 0) + return -1; + if (read_runs(avctx, &gb, &c->bundle[BINK_SRC_RUN]) < 0) + return -1; + + if (by == bh) + break; + dst = c->pic.data[plane_idx] + 8*by*stride; + prev = c->last.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->dsp.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(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); + return -1; + } + 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: + c->dsp.clear_block(block); + block[0] = get_value(c, BINK_SRC_INTRA_DC); + read_dct_coeffs(&gb, block, c->scantable.permutated, 1); + c->dsp.idct(block); + c->dsp.put_pixels_nonclamped(block, ublock, 8); + break; + case FILL_BLOCK: + v = get_value(c, BINK_SRC_COLORS); + c->dsp.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(avctx, AV_LOG_ERROR, "Incorrect 16x16 block type %d\n", blk); + return -1; + } + if (blk != FILL_BLOCK) + c->dsp.scale_block(ublock, dst, stride); + bx++; + dst += 8; + prev += 8; + break; + case MOTION_BLOCK: + xoff = get_value(c, BINK_SRC_X_OFF); + yoff = get_value(c, BINK_SRC_Y_OFF); + ref = prev + xoff + yoff * stride; + if (ref < ref_start || ref > ref_end) { + av_log(avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n", + bx*8 + xoff, by*8 + yoff); + return -1; + } + c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8); + 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(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); + return -1; + } + 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: + xoff = get_value(c, BINK_SRC_X_OFF); + yoff = get_value(c, BINK_SRC_Y_OFF); + ref = prev + xoff + yoff * stride; + if (ref < ref_start || ref > ref_end) { + av_log(avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n", + bx*8 + xoff, by*8 + yoff); + return -1; + } + c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8); + c->dsp.clear_block(block); + v = get_bits(&gb, 7); + read_residue(&gb, block, v); + c->dsp.add_pixels8(dst, block, stride); + break; + case INTRA_BLOCK: + c->dsp.clear_block(block); + block[0] = get_value(c, BINK_SRC_INTRA_DC); + read_dct_coeffs(&gb, block, c->scantable.permutated, 1); + c->dsp.idct_put(dst, stride, block); + break; + case FILL_BLOCK: + v = get_value(c, BINK_SRC_COLORS); + c->dsp.fill_block_tab[1](dst, v, stride, 8); + break; + case INTER_BLOCK: + xoff = get_value(c, BINK_SRC_X_OFF); + yoff = get_value(c, BINK_SRC_Y_OFF); + ref = prev + xoff + yoff * stride; + c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8); + c->dsp.clear_block(block); + block[0] = get_value(c, BINK_SRC_INTER_DC); + read_dct_coeffs(&gb, block, c->scantable.permutated, 0); + c->dsp.idct_add(dst, stride, block); + 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(avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk); + return -1; + } + } + } + if (get_bits_count(&gb) & 0x1F) //next plane data starts at 32-bit boundary + skip_bits_long(&gb, 32 - (get_bits_count(&gb) & 0x1F)); + } + emms_c(); + + *data_size = sizeof(AVFrame); + *(AVFrame*)data = c->pic; + + FFSWAP(AVFrame, c->pic, c->last); + + /* always report that the buffer was completely consumed */ + return pkt->size; +} + +static av_cold int decode_init(AVCodecContext *avctx) +{ + BinkContext * const c = avctx->priv_data; + static VLC_TYPE table[16 * 128][2]; + int i; + + c->version = avctx->codec_tag >> 24; + if (c->version < 'c') { + av_log(avctx, AV_LOG_ERROR, "Too old version '%c'\n", c->version); + return -1; + } + c->swap_planes = c->version >= 'i'; + 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->pic.data[0] = NULL; + + if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { + return 1; + } + + avctx->pix_fmt = PIX_FMT_YUV420P; + + avctx->idct_algo = FF_IDCT_BINK; + dsputil_init(&c->dsp, avctx); + ff_init_scantable(c->dsp.idct_permutation, &c->scantable, bink_scan); + + init_bundles(c); + + return 0; +} + +static av_cold int decode_end(AVCodecContext *avctx) +{ + BinkContext * const c = avctx->priv_data; + + if (c->pic.data[0]) + avctx->release_buffer(avctx, &c->pic); + if (c->last.data[0]) + avctx->release_buffer(avctx, &c->last); + + free_bundles(c); + return 0; +} + +AVCodec bink_decoder = { + "binkvideo", + CODEC_TYPE_VIDEO, + CODEC_ID_BINKVIDEO, + sizeof(BinkContext), + decode_init, + NULL, + decode_end, + decode_frame, + .long_name = NULL_IF_CONFIG_SMALL("Bink video"), +}; |