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/* |
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* MidiVid MV30 decoder |
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* |
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* Copyright (c) 2020 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stddef.h> |
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#include <string.h> |
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#include "libavutil/thread.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "codec_internal.h" |
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#include "copy_block.h" |
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#include "decode.h" |
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#include "mathops.h" |
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#include "blockdsp.h" |
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#include "get_bits.h" |
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#include "aandcttab.h" |
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#define CBP_VLC_BITS 9 |
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typedef struct MV30Context { |
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GetBitContext gb; |
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int intra_quant; |
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int inter_quant; |
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int is_inter; |
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int mode_size; |
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int nb_mvectors; |
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int block[6][64]; |
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int16_t *mvectors; |
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unsigned int mvectors_size; |
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int16_t *coeffs; |
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unsigned int coeffs_size; |
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int16_t intraq_tab[2][64]; |
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int16_t interq_tab[2][64]; |
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BlockDSPContext bdsp; |
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AVFrame *prev_frame; |
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} MV30Context; |
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static VLC cbp_tab; |
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64 |
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static const uint8_t luma_tab[] = { |
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12, 12, 15, 19, 25, 34, 40, 48, |
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12, 12, 18, 22, 27, 44, 47, 46, |
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17, 18, 21, 26, 35, 46, 52, 47, |
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18, 20, 24, 28, 40, 61, 59, 51, |
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20, 24, 32, 43, 50, 72, 72, 63, |
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25, 31, 42, 48, 58, 72, 81, 75, |
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38, 46, 54, 61, 71, 84, 88, 85, |
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50, 61, 65, 68, 79, 78, 86, 91, |
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}; |
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static const uint8_t chroma_tab[] = { |
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12, 16, 24, 47, 99, 99, 99, 99, |
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16, 21, 26, 66, 99, 99, 99, 99, |
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24, 26, 56, 99, 99, 99, 99, 99, |
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47, 66, 99, 99, 99, 99, 99, 99, |
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99, 99, 99, 99, 99, 99, 99, 99, |
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99, 99, 99, 99, 99, 99, 99, 99, |
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99, 99, 99, 99, 99, 99, 99, 99, |
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99, 99, 99, 99, 99, 99, 99, 99, |
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}; |
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static const uint8_t zigzag[] = { |
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0, 1, 8, 9, 16, 2, 3, 10, |
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17, 24, 32, 25, 18, 11, 4, 5, |
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12, 19, 26, 33, 40, 48, 41, 34, |
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27, 20, 13, 6, 7, 14, 21, 28, |
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35, 42, 49, 56, 57, 50, 43, 36, |
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29, 22, 15, 23, 30, 37, 44, 51, |
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58, 59, 52, 45, 38, 31, 39, 46, |
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53, 60, 61, 54, 47, 55, 62, 63, |
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}; |
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✗ |
static void get_qtable(int16_t *table, int quant, const uint8_t *quant_tab) |
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{ |
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int factor = quant < 50 ? 5000 / FFMAX(quant, 1) : 200 - FFMIN(quant, 100) * 2; |
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for (int i = 0; i < 64; i++) { |
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table[i] = av_clip((quant_tab[i] * factor + 0x32) / 100, 1, 0x7fff); |
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table[i] = ((int)ff_aanscales[i] * (int)table[i] + 0x800) >> 12; |
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} |
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} |
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static inline void idct_1d(unsigned *blk, int step) |
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{ |
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const unsigned t0 = blk[0 * step] + blk[4 * step]; |
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const unsigned t1 = blk[0 * step] - blk[4 * step]; |
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const unsigned t2 = blk[2 * step] + blk[6 * step]; |
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const unsigned t3 = ((int)((blk[2 * step] - blk[6 * step]) * 362U) >> 8) - t2; |
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const unsigned t4 = t0 + t2; |
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const unsigned t5 = t0 - t2; |
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const unsigned t6 = t1 + t3; |
116 |
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const unsigned t7 = t1 - t3; |
117 |
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const unsigned t8 = blk[5 * step] + blk[3 * step]; |
118 |
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const unsigned t9 = blk[5 * step] - blk[3 * step]; |
119 |
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const unsigned tA = blk[1 * step] + blk[7 * step]; |
120 |
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const unsigned tB = blk[1 * step] - blk[7 * step]; |
121 |
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const unsigned tC = t8 + tA; |
122 |
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const unsigned tD = (int)((tB + t9) * 473U) >> 8; |
123 |
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const unsigned tE = (((int)(t9 * -669U) >> 8) - tC) + tD; |
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const unsigned tF = ((int)((tA - t8) * 362U) >> 8) - tE; |
125 |
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const unsigned t10 = (((int)(tB * 277U) >> 8) - tD) + tF; |
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blk[0 * step] = t4 + tC; |
128 |
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blk[1 * step] = t6 + tE; |
129 |
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blk[2 * step] = t7 + tF; |
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blk[3 * step] = t5 - t10; |
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blk[4 * step] = t5 + t10; |
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blk[5 * step] = t7 - tF; |
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blk[6 * step] = t6 - tE; |
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blk[7 * step] = t4 - tC; |
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} |
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static void idct_put(uint8_t *dst, int stride, int *block) |
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{ |
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for (int i = 0; i < 8; i++) { |
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if ((block[0x08 + i] | |
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block[0x10 + i] | |
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block[0x18 + i] | |
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block[0x20 + i] | |
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block[0x28 + i] | |
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block[0x30 + i] | |
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block[0x38 + i]) == 0) { |
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block[0x08 + i] = block[i]; |
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block[0x10 + i] = block[i]; |
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block[0x18 + i] = block[i]; |
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block[0x20 + i] = block[i]; |
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block[0x28 + i] = block[i]; |
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block[0x30 + i] = block[i]; |
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block[0x38 + i] = block[i]; |
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} else { |
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idct_1d(block + i, 8); |
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} |
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} |
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159 |
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for (int i = 0; i < 8; i++) { |
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idct_1d(block, 1); |
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for (int j = 0; j < 8; j++) |
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dst[j] = av_clip_uint8((block[j] >> 5) + 128); |
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block += 8; |
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dst += stride; |
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} |
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} |
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static void idct_add(uint8_t *dst, int stride, |
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const uint8_t *src, int in_linesize, int *block) |
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{ |
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for (int i = 0; i < 8; i++) { |
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if ((block[0x08 + i] | |
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block[0x10 + i] | |
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block[0x18 + i] | |
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block[0x20 + i] | |
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block[0x28 + i] | |
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block[0x30 + i] | |
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block[0x38 + i]) == 0) { |
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block[0x08 + i] = block[i]; |
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block[0x10 + i] = block[i]; |
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block[0x18 + i] = block[i]; |
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block[0x20 + i] = block[i]; |
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block[0x28 + i] = block[i]; |
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block[0x30 + i] = block[i]; |
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block[0x38 + i] = block[i]; |
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} else { |
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idct_1d(block + i, 8); |
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} |
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} |
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for (int i = 0; i < 8; i++) { |
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idct_1d(block, 1); |
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for (int j = 0; j < 8; j++) |
194 |
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dst[j] = av_clip_uint8((block[j] >> 5) + src[j]); |
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block += 8; |
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dst += stride; |
197 |
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src += in_linesize; |
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} |
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} |
200 |
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201 |
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static inline void idct2_1d(int *blk, int step) |
202 |
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{ |
203 |
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const unsigned int t0 = blk[0 * step]; |
204 |
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const unsigned int t1 = blk[1 * step]; |
205 |
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const unsigned int t2 = (int)(t1 * 473U) >> 8; |
206 |
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const unsigned int t3 = t2 - t1; |
207 |
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const unsigned int t4 = ((int)(t1 * 362U) >> 8) - t3; |
208 |
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const unsigned int t5 = (((int)(t1 * 277U) >> 8) - t2) + t4; |
209 |
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|
210 |
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blk[0 * step] = t1 + t0; |
211 |
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blk[1 * step] = t0 + t3; |
212 |
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blk[2 * step] = t4 + t0; |
213 |
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blk[3 * step] = t0 - t5; |
214 |
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blk[4 * step] = t5 + t0; |
215 |
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blk[5 * step] = t0 - t4; |
216 |
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blk[6 * step] = t0 - t3; |
217 |
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blk[7 * step] = t0 - t1; |
218 |
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} |
219 |
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220 |
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✗ |
static void idct2_put(uint8_t *dst, int stride, int *block) |
221 |
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{ |
222 |
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✗ |
for (int i = 0; i < 2; i++) { |
223 |
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✗ |
if ((block[0x08 + i]) == 0) { |
224 |
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block[0x08 + i] = block[i]; |
225 |
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block[0x10 + i] = block[i]; |
226 |
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block[0x18 + i] = block[i]; |
227 |
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block[0x20 + i] = block[i]; |
228 |
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block[0x28 + i] = block[i]; |
229 |
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block[0x30 + i] = block[i]; |
230 |
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✗ |
block[0x38 + i] = block[i]; |
231 |
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} else { |
232 |
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idct2_1d(block + i, 8); |
233 |
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} |
234 |
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} |
235 |
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236 |
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✗ |
for (int i = 0; i < 8; i++) { |
237 |
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✗ |
if (block[1] == 0) { |
238 |
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✗ |
for (int j = 0; j < 8; j++) |
239 |
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✗ |
dst[j] = av_clip_uint8((block[0] >> 5) + 128); |
240 |
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} else { |
241 |
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✗ |
idct2_1d(block, 1); |
242 |
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✗ |
for (int j = 0; j < 8; j++) |
243 |
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✗ |
dst[j] = av_clip_uint8((block[j] >> 5) + 128); |
244 |
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} |
245 |
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✗ |
block += 8; |
246 |
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✗ |
dst += stride; |
247 |
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} |
248 |
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✗ |
} |
249 |
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|
250 |
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✗ |
static void idct2_add(uint8_t *dst, int stride, |
251 |
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const uint8_t *src, int in_linesize, |
252 |
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int *block) |
253 |
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{ |
254 |
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✗ |
for (int i = 0; i < 2; i++) { |
255 |
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✗ |
if ((block[0x08 + i]) == 0) { |
256 |
|
✗ |
block[0x08 + i] = block[i]; |
257 |
|
✗ |
block[0x10 + i] = block[i]; |
258 |
|
✗ |
block[0x18 + i] = block[i]; |
259 |
|
✗ |
block[0x20 + i] = block[i]; |
260 |
|
✗ |
block[0x28 + i] = block[i]; |
261 |
|
✗ |
block[0x30 + i] = block[i]; |
262 |
|
✗ |
block[0x38 + i] = block[i]; |
263 |
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} else { |
264 |
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✗ |
idct2_1d(block + i, 8); |
265 |
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} |
266 |
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} |
267 |
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|
268 |
|
✗ |
for (int i = 0; i < 8; i++) { |
269 |
|
✗ |
if (block[1] == 0) { |
270 |
|
✗ |
for (int j = 0; j < 8; j++) |
271 |
|
✗ |
dst[j] = av_clip_uint8((block[0] >> 5) + src[j]); |
272 |
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} else { |
273 |
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✗ |
idct2_1d(block, 1); |
274 |
|
✗ |
for (int j = 0; j < 8; j++) |
275 |
|
✗ |
dst[j] = av_clip_uint8((block[j] >> 5) + src[j]); |
276 |
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} |
277 |
|
✗ |
block += 8; |
278 |
|
✗ |
dst += stride; |
279 |
|
✗ |
src += in_linesize; |
280 |
|
|
} |
281 |
|
✗ |
} |
282 |
|
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|
283 |
|
✗ |
static void update_inter_block(uint8_t *dst, int stride, |
284 |
|
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const uint8_t *src, int in_linesize, |
285 |
|
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int block) |
286 |
|
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{ |
287 |
|
✗ |
for (int i = 0; i < 8; i++) { |
288 |
|
✗ |
for (int j = 0; j < 8; j++) |
289 |
|
✗ |
dst[j] = av_clip_uint8(block + src[j]); |
290 |
|
✗ |
dst += stride; |
291 |
|
✗ |
src += in_linesize; |
292 |
|
|
} |
293 |
|
✗ |
} |
294 |
|
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|
295 |
|
✗ |
static int decode_intra_block(AVCodecContext *avctx, int mode, |
296 |
|
|
GetByteContext *gbyte, int16_t *qtab, |
297 |
|
|
int *block, int *pfill, |
298 |
|
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uint8_t *dst, int linesize) |
299 |
|
|
{ |
300 |
|
✗ |
MV30Context *s = avctx->priv_data; |
301 |
|
|
int fill; |
302 |
|
|
|
303 |
|
✗ |
switch (mode) { |
304 |
|
✗ |
case 0: |
305 |
|
✗ |
s->bdsp.fill_block_tab[1](dst, 128, linesize, 8); |
306 |
|
✗ |
break; |
307 |
|
✗ |
case 1: |
308 |
|
✗ |
fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
309 |
|
✗ |
pfill[0] += fill; |
310 |
|
✗ |
block[0] = ((int)((unsigned)pfill[0] * qtab[0]) >> 5) + 128; |
311 |
|
✗ |
s->bdsp.fill_block_tab[1](dst, block[0], linesize, 8); |
312 |
|
✗ |
break; |
313 |
|
✗ |
case 2: |
314 |
|
✗ |
memset(block, 0, sizeof(*block) * 64); |
315 |
|
✗ |
fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
316 |
|
✗ |
pfill[0] += fill; |
317 |
|
✗ |
block[0] = (unsigned)pfill[0] * qtab[0]; |
318 |
|
✗ |
block[1] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[1]; |
319 |
|
✗ |
block[8] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[8]; |
320 |
|
✗ |
block[9] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[9]; |
321 |
|
✗ |
idct2_put(dst, linesize, block); |
322 |
|
✗ |
break; |
323 |
|
✗ |
case 3: |
324 |
|
✗ |
fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
325 |
|
✗ |
pfill[0] += fill; |
326 |
|
✗ |
block[0] = (unsigned)pfill[0] * qtab[0]; |
327 |
|
✗ |
for (int i = 1; i < 64; i++) |
328 |
|
✗ |
block[zigzag[i]] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[zigzag[i]]; |
329 |
|
✗ |
idct_put(dst, linesize, block); |
330 |
|
✗ |
break; |
331 |
|
|
} |
332 |
|
|
|
333 |
|
✗ |
return 0; |
334 |
|
|
} |
335 |
|
|
|
336 |
|
✗ |
static int decode_inter_block(AVCodecContext *avctx, int mode, |
337 |
|
|
GetByteContext *gbyte, int16_t *qtab, |
338 |
|
|
int *block, int *pfill, |
339 |
|
|
uint8_t *dst, int linesize, |
340 |
|
|
const uint8_t *src, int in_linesize) |
341 |
|
|
{ |
342 |
|
|
int fill; |
343 |
|
|
|
344 |
|
✗ |
switch (mode) { |
345 |
|
✗ |
case 0: |
346 |
|
✗ |
copy_block8(dst, src, linesize, in_linesize, 8); |
347 |
|
✗ |
break; |
348 |
|
✗ |
case 1: |
349 |
|
✗ |
fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
350 |
|
✗ |
pfill[0] += fill; |
351 |
|
✗ |
block[0] = (int)((unsigned)pfill[0] * qtab[0]) >> 5; |
352 |
|
✗ |
update_inter_block(dst, linesize, src, in_linesize, block[0]); |
353 |
|
✗ |
break; |
354 |
|
✗ |
case 2: |
355 |
|
✗ |
memset(block, 0, sizeof(*block) * 64); |
356 |
|
✗ |
fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
357 |
|
✗ |
pfill[0] += fill; |
358 |
|
✗ |
block[0] = (unsigned)pfill[0] * qtab[0]; |
359 |
|
✗ |
block[1] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[1]; |
360 |
|
✗ |
block[8] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[8]; |
361 |
|
✗ |
block[9] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[9]; |
362 |
|
✗ |
idct2_add(dst, linesize, src, in_linesize, block); |
363 |
|
✗ |
break; |
364 |
|
✗ |
case 3: |
365 |
|
✗ |
fill = sign_extend(bytestream2_get_ne16(gbyte), 16); |
366 |
|
✗ |
pfill[0] += fill; |
367 |
|
✗ |
block[0] = (unsigned)pfill[0] * qtab[0]; |
368 |
|
✗ |
for (int i = 1; i < 64; i++) |
369 |
|
✗ |
block[zigzag[i]] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[zigzag[i]]; |
370 |
|
✗ |
idct_add(dst, linesize, src, in_linesize, block); |
371 |
|
✗ |
break; |
372 |
|
|
} |
373 |
|
|
|
374 |
|
✗ |
return 0; |
375 |
|
|
} |
376 |
|
|
|
377 |
|
✗ |
static int decode_coeffs(GetBitContext *gb, int16_t *coeffs, int nb_codes) |
378 |
|
|
{ |
379 |
|
✗ |
memset(coeffs, 0, nb_codes * sizeof(*coeffs)); |
380 |
|
|
|
381 |
|
✗ |
for (int i = 0; i < nb_codes;) { |
382 |
|
✗ |
int value = get_vlc2(gb, cbp_tab.table, CBP_VLC_BITS, 1); |
383 |
|
|
|
384 |
|
✗ |
if (value > 0) { |
385 |
|
✗ |
int x = get_bits(gb, value); |
386 |
|
|
|
387 |
|
✗ |
if (x < (1 << value) / 2) { |
388 |
|
✗ |
x = (1 << (value - 1)) + (x & ((1 << value) - 1 >> 1)); |
389 |
|
|
} else { |
390 |
|
✗ |
x = -(1 << (value - 1)) - (x & ((1 << value) - 1 >> 1)); |
391 |
|
|
} |
392 |
|
✗ |
coeffs[i++] = x; |
393 |
|
|
} else { |
394 |
|
✗ |
int flag = get_bits1(gb); |
395 |
|
|
|
396 |
|
✗ |
i += get_bits(gb, 3 + flag * 3) + 1 + flag * 8; |
397 |
|
|
} |
398 |
|
|
} |
399 |
|
|
|
400 |
|
✗ |
return 0; |
401 |
|
|
} |
402 |
|
|
|
403 |
|
✗ |
static int decode_intra(AVCodecContext *avctx, GetBitContext *gb, AVFrame *frame) |
404 |
|
|
{ |
405 |
|
✗ |
MV30Context *s = avctx->priv_data; |
406 |
|
|
GetBitContext mgb; |
407 |
|
|
uint8_t *dst[6]; |
408 |
|
|
int linesize[6]; |
409 |
|
|
int ret; |
410 |
|
|
|
411 |
|
✗ |
mgb = *gb; |
412 |
|
✗ |
if (get_bits_left(gb) < s->mode_size * 8) |
413 |
|
✗ |
return AVERROR_INVALIDDATA; |
414 |
|
|
|
415 |
|
✗ |
skip_bits_long(gb, s->mode_size * 8); |
416 |
|
|
|
417 |
|
✗ |
linesize[0] = frame->linesize[0]; |
418 |
|
✗ |
linesize[1] = frame->linesize[0]; |
419 |
|
✗ |
linesize[2] = frame->linesize[0]; |
420 |
|
✗ |
linesize[3] = frame->linesize[0]; |
421 |
|
✗ |
linesize[4] = frame->linesize[1]; |
422 |
|
✗ |
linesize[5] = frame->linesize[2]; |
423 |
|
|
|
424 |
|
✗ |
for (int y = 0; y < avctx->height; y += 16) { |
425 |
|
|
GetByteContext gbyte; |
426 |
|
✗ |
int pfill[3][1] = { {0} }; |
427 |
|
✗ |
int nb_codes = get_bits(gb, 16); |
428 |
|
|
|
429 |
|
✗ |
av_fast_padded_malloc(&s->coeffs, &s->coeffs_size, nb_codes * sizeof(*s->coeffs)); |
430 |
|
✗ |
if (!s->coeffs) |
431 |
|
✗ |
return AVERROR(ENOMEM); |
432 |
|
✗ |
ret = decode_coeffs(gb, s->coeffs, nb_codes); |
433 |
|
✗ |
if (ret < 0) |
434 |
|
✗ |
return ret; |
435 |
|
|
|
436 |
|
✗ |
bytestream2_init(&gbyte, (uint8_t *)s->coeffs, nb_codes * sizeof(*s->coeffs)); |
437 |
|
|
|
438 |
|
✗ |
for (int x = 0; x < avctx->width; x += 16) { |
439 |
|
✗ |
dst[0] = frame->data[0] + linesize[0] * y + x; |
440 |
|
✗ |
dst[1] = frame->data[0] + linesize[0] * y + x + 8; |
441 |
|
✗ |
dst[2] = frame->data[0] + linesize[0] * (y + 8) + x; |
442 |
|
✗ |
dst[3] = frame->data[0] + linesize[0] * (y + 8) + x + 8; |
443 |
|
✗ |
dst[4] = frame->data[1] + linesize[4] * (y >> 1) + (x >> 1); |
444 |
|
✗ |
dst[5] = frame->data[2] + linesize[5] * (y >> 1) + (x >> 1); |
445 |
|
|
|
446 |
|
✗ |
for (int b = 0; b < 6; b++) { |
447 |
|
✗ |
int mode = get_bits_le(&mgb, 2); |
448 |
|
|
|
449 |
|
✗ |
ret = decode_intra_block(avctx, mode, &gbyte, s->intraq_tab[b >= 4], |
450 |
|
✗ |
s->block[b], |
451 |
|
✗ |
pfill[(b >= 4) + (b >= 5)], |
452 |
|
|
dst[b], linesize[b]); |
453 |
|
✗ |
if (ret < 0) |
454 |
|
✗ |
return ret; |
455 |
|
|
} |
456 |
|
|
} |
457 |
|
|
} |
458 |
|
|
|
459 |
|
✗ |
return 0; |
460 |
|
|
} |
461 |
|
|
|
462 |
|
✗ |
static int decode_inter(AVCodecContext *avctx, GetBitContext *gb, |
463 |
|
|
AVFrame *frame, AVFrame *prev) |
464 |
|
|
{ |
465 |
|
✗ |
MV30Context *s = avctx->priv_data; |
466 |
|
|
GetBitContext mask; |
467 |
|
|
GetBitContext mgb; |
468 |
|
|
GetByteContext mv; |
469 |
|
✗ |
const int mask_size = ((avctx->height >> 4) * (avctx->width >> 4) * 2 + 7) / 8; |
470 |
|
|
uint8_t *dst[6], *src[6]; |
471 |
|
|
int in_linesize[6]; |
472 |
|
|
int linesize[6]; |
473 |
|
✗ |
int ret, cnt = 0; |
474 |
|
✗ |
int flags = 0; |
475 |
|
|
|
476 |
|
✗ |
in_linesize[0] = prev->linesize[0]; |
477 |
|
✗ |
in_linesize[1] = prev->linesize[0]; |
478 |
|
✗ |
in_linesize[2] = prev->linesize[0]; |
479 |
|
✗ |
in_linesize[3] = prev->linesize[0]; |
480 |
|
✗ |
in_linesize[4] = prev->linesize[1]; |
481 |
|
✗ |
in_linesize[5] = prev->linesize[2]; |
482 |
|
|
|
483 |
|
✗ |
linesize[0] = frame->linesize[0]; |
484 |
|
✗ |
linesize[1] = frame->linesize[0]; |
485 |
|
✗ |
linesize[2] = frame->linesize[0]; |
486 |
|
✗ |
linesize[3] = frame->linesize[0]; |
487 |
|
✗ |
linesize[4] = frame->linesize[1]; |
488 |
|
✗ |
linesize[5] = frame->linesize[2]; |
489 |
|
|
|
490 |
|
✗ |
av_fast_padded_malloc(&s->mvectors, &s->mvectors_size, 2 * s->nb_mvectors * sizeof(*s->mvectors)); |
491 |
|
✗ |
if (!s->mvectors) { |
492 |
|
✗ |
ret = AVERROR(ENOMEM); |
493 |
|
✗ |
goto fail; |
494 |
|
|
} |
495 |
|
|
|
496 |
|
✗ |
mask = *gb; |
497 |
|
✗ |
skip_bits_long(gb, mask_size * 8); |
498 |
|
✗ |
mgb = *gb; |
499 |
|
✗ |
skip_bits_long(gb, s->mode_size * 8); |
500 |
|
|
|
501 |
|
✗ |
ret = decode_coeffs(gb, s->mvectors, 2 * s->nb_mvectors); |
502 |
|
✗ |
if (ret < 0) |
503 |
|
✗ |
goto fail; |
504 |
|
|
|
505 |
|
✗ |
bytestream2_init(&mv, (uint8_t *)s->mvectors, 2 * s->nb_mvectors * sizeof(*s->mvectors)); |
506 |
|
|
|
507 |
|
✗ |
for (int y = 0; y < avctx->height; y += 16) { |
508 |
|
|
GetByteContext gbyte; |
509 |
|
✗ |
int pfill[3][1] = { {0} }; |
510 |
|
✗ |
int nb_codes = get_bits(gb, 16); |
511 |
|
|
|
512 |
|
✗ |
skip_bits(gb, 8); |
513 |
|
✗ |
if (get_bits_left(gb) < 0) { |
514 |
|
✗ |
ret = AVERROR_INVALIDDATA; |
515 |
|
✗ |
goto fail; |
516 |
|
|
} |
517 |
|
|
|
518 |
|
✗ |
av_fast_padded_malloc(&s->coeffs, &s->coeffs_size, nb_codes * sizeof(*s->coeffs)); |
519 |
|
✗ |
if (!s->coeffs) { |
520 |
|
✗ |
ret = AVERROR(ENOMEM); |
521 |
|
✗ |
goto fail; |
522 |
|
|
} |
523 |
|
|
|
524 |
|
✗ |
ret = decode_coeffs(gb, s->coeffs, nb_codes); |
525 |
|
✗ |
if (ret < 0) |
526 |
|
✗ |
goto fail; |
527 |
|
|
|
528 |
|
✗ |
bytestream2_init(&gbyte, (uint8_t *)s->coeffs, nb_codes * sizeof(*s->coeffs)); |
529 |
|
|
|
530 |
|
✗ |
for (int x = 0; x < avctx->width; x += 16) { |
531 |
|
✗ |
if (cnt >= 4) |
532 |
|
✗ |
cnt = 0; |
533 |
|
✗ |
if (cnt == 0) { |
534 |
|
✗ |
if (get_bits_left(&mask) < 8) { |
535 |
|
✗ |
ret = AVERROR_INVALIDDATA; |
536 |
|
✗ |
goto fail; |
537 |
|
|
} |
538 |
|
✗ |
flags = get_bits(&mask, 8); |
539 |
|
|
} |
540 |
|
|
|
541 |
|
✗ |
dst[0] = frame->data[0] + linesize[0] * y + x; |
542 |
|
✗ |
dst[1] = frame->data[0] + linesize[0] * y + x + 8; |
543 |
|
✗ |
dst[2] = frame->data[0] + linesize[0] * (y + 8) + x; |
544 |
|
✗ |
dst[3] = frame->data[0] + linesize[0] * (y + 8) + x + 8; |
545 |
|
✗ |
dst[4] = frame->data[1] + linesize[4] * (y >> 1) + (x >> 1); |
546 |
|
✗ |
dst[5] = frame->data[2] + linesize[5] * (y >> 1) + (x >> 1); |
547 |
|
|
|
548 |
|
✗ |
if ((flags >> (cnt)) & 1) { |
549 |
|
✗ |
int mv_x = sign_extend(bytestream2_get_ne16(&mv), 16); |
550 |
|
✗ |
int mv_y = sign_extend(bytestream2_get_ne16(&mv), 16); |
551 |
|
|
|
552 |
|
✗ |
int px = x + mv_x; |
553 |
|
✗ |
int py = y + mv_y; |
554 |
|
|
|
555 |
|
✗ |
if (px < 0 || px > FFALIGN(avctx->width , 16) - 16 || |
556 |
|
✗ |
py < 0 || py > FFALIGN(avctx->height, 16) - 16) |
557 |
|
✗ |
return AVERROR_INVALIDDATA; |
558 |
|
|
|
559 |
|
✗ |
src[0] = prev->data[0] + in_linesize[0] * py + px; |
560 |
|
✗ |
src[1] = prev->data[0] + in_linesize[0] * py + px + 8; |
561 |
|
✗ |
src[2] = prev->data[0] + in_linesize[0] * (py + 8) + px; |
562 |
|
✗ |
src[3] = prev->data[0] + in_linesize[0] * (py + 8) + px + 8; |
563 |
|
✗ |
src[4] = prev->data[1] + in_linesize[4] * (py >> 1) + (px >> 1); |
564 |
|
✗ |
src[5] = prev->data[2] + in_linesize[5] * (py >> 1) + (px >> 1); |
565 |
|
|
|
566 |
|
✗ |
if ((flags >> (cnt + 4)) & 1) { |
567 |
|
✗ |
for (int b = 0; b < 6; b++) |
568 |
|
✗ |
copy_block8(dst[b], src[b], linesize[b], in_linesize[b], 8); |
569 |
|
|
} else { |
570 |
|
✗ |
for (int b = 0; b < 6; b++) { |
571 |
|
✗ |
int mode = get_bits_le(&mgb, 2); |
572 |
|
|
|
573 |
|
✗ |
ret = decode_inter_block(avctx, mode, &gbyte, s->interq_tab[b >= 4], |
574 |
|
✗ |
s->block[b], |
575 |
|
✗ |
pfill[(b >= 4) + (b >= 5)], |
576 |
|
|
dst[b], linesize[b], |
577 |
|
✗ |
src[b], in_linesize[b]); |
578 |
|
✗ |
if (ret < 0) |
579 |
|
✗ |
goto fail; |
580 |
|
|
} |
581 |
|
|
} |
582 |
|
|
} else { |
583 |
|
✗ |
for (int b = 0; b < 6; b++) { |
584 |
|
✗ |
int mode = get_bits_le(&mgb, 2); |
585 |
|
|
|
586 |
|
✗ |
ret = decode_intra_block(avctx, mode, &gbyte, s->intraq_tab[b >= 4], |
587 |
|
✗ |
s->block[b], |
588 |
|
✗ |
pfill[(b >= 4) + (b >= 5)], |
589 |
|
|
dst[b], linesize[b]); |
590 |
|
✗ |
if (ret < 0) |
591 |
|
✗ |
goto fail; |
592 |
|
|
} |
593 |
|
|
} |
594 |
|
|
|
595 |
|
✗ |
cnt++; |
596 |
|
|
} |
597 |
|
|
} |
598 |
|
|
|
599 |
|
✗ |
fail: |
600 |
|
✗ |
return ret; |
601 |
|
|
} |
602 |
|
|
|
603 |
|
✗ |
static int decode_frame(AVCodecContext *avctx, AVFrame *frame, |
604 |
|
|
int *got_frame, AVPacket *avpkt) |
605 |
|
|
{ |
606 |
|
✗ |
MV30Context *s = avctx->priv_data; |
607 |
|
✗ |
GetBitContext *gb = &s->gb; |
608 |
|
|
int ret; |
609 |
|
|
|
610 |
|
✗ |
if ((ret = init_get_bits8(gb, avpkt->data, avpkt->size)) < 0) |
611 |
|
✗ |
return ret; |
612 |
|
|
|
613 |
|
✗ |
if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) |
614 |
|
✗ |
return ret; |
615 |
|
|
|
616 |
|
✗ |
s->intra_quant = get_bits(gb, 8); |
617 |
|
✗ |
s->inter_quant = s->intra_quant + get_sbits(gb, 8); |
618 |
|
✗ |
s->is_inter = get_bits_le(gb, 16); |
619 |
|
✗ |
s->mode_size = get_bits_le(gb, 16); |
620 |
|
✗ |
if (s->is_inter) |
621 |
|
✗ |
s->nb_mvectors = get_bits_le(gb, 16); |
622 |
|
|
|
623 |
|
✗ |
get_qtable(s->intraq_tab[0], s->intra_quant, luma_tab); |
624 |
|
✗ |
get_qtable(s->intraq_tab[1], s->intra_quant, chroma_tab); |
625 |
|
|
|
626 |
|
✗ |
if (s->is_inter == 0) { |
627 |
|
✗ |
frame->flags |= AV_FRAME_FLAG_KEY; |
628 |
|
✗ |
ret = decode_intra(avctx, gb, frame); |
629 |
|
✗ |
if (ret < 0) |
630 |
|
✗ |
return ret; |
631 |
|
|
} else { |
632 |
|
✗ |
get_qtable(s->interq_tab[0], s->inter_quant, luma_tab); |
633 |
|
✗ |
get_qtable(s->interq_tab[1], s->inter_quant, chroma_tab); |
634 |
|
|
|
635 |
|
✗ |
if (!s->prev_frame->data[0]) { |
636 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n"); |
637 |
|
✗ |
return AVERROR_INVALIDDATA; |
638 |
|
|
} |
639 |
|
|
|
640 |
|
✗ |
frame->flags &= ~AV_FRAME_FLAG_KEY; |
641 |
|
✗ |
ret = decode_inter(avctx, gb, frame, s->prev_frame); |
642 |
|
✗ |
if (ret < 0) |
643 |
|
✗ |
return ret; |
644 |
|
|
} |
645 |
|
|
|
646 |
|
✗ |
if ((ret = av_frame_replace(s->prev_frame, frame)) < 0) |
647 |
|
✗ |
return ret; |
648 |
|
|
|
649 |
|
✗ |
*got_frame = 1; |
650 |
|
|
|
651 |
|
✗ |
return avpkt->size; |
652 |
|
|
} |
653 |
|
|
|
654 |
|
|
static const uint8_t cbp_bits[] = { |
655 |
|
|
2, 2, 3, 3, 3, 4, 5, 6, 7, 8, 9, 9, |
656 |
|
|
}; |
657 |
|
|
|
658 |
|
✗ |
static av_cold void init_static_data(void) |
659 |
|
|
{ |
660 |
|
✗ |
VLC_INIT_STATIC_FROM_LENGTHS(&cbp_tab, CBP_VLC_BITS, FF_ARRAY_ELEMS(cbp_bits), |
661 |
|
|
cbp_bits, 1, NULL, 0, 0, 0, 0, 1 << CBP_VLC_BITS); |
662 |
|
✗ |
} |
663 |
|
|
|
664 |
|
✗ |
static av_cold int decode_init(AVCodecContext *avctx) |
665 |
|
|
{ |
666 |
|
✗ |
MV30Context *s = avctx->priv_data; |
667 |
|
|
static AVOnce init_static_once = AV_ONCE_INIT; |
668 |
|
|
|
669 |
|
✗ |
avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
670 |
|
✗ |
avctx->color_range = AVCOL_RANGE_JPEG; |
671 |
|
|
|
672 |
|
✗ |
ff_blockdsp_init(&s->bdsp); |
673 |
|
|
|
674 |
|
✗ |
s->prev_frame = av_frame_alloc(); |
675 |
|
✗ |
if (!s->prev_frame) |
676 |
|
✗ |
return AVERROR(ENOMEM); |
677 |
|
|
|
678 |
|
✗ |
ff_thread_once(&init_static_once, init_static_data); |
679 |
|
|
|
680 |
|
✗ |
return 0; |
681 |
|
|
} |
682 |
|
|
|
683 |
|
✗ |
static void decode_flush(AVCodecContext *avctx) |
684 |
|
|
{ |
685 |
|
✗ |
MV30Context *s = avctx->priv_data; |
686 |
|
|
|
687 |
|
✗ |
av_frame_unref(s->prev_frame); |
688 |
|
✗ |
} |
689 |
|
|
|
690 |
|
✗ |
static av_cold int decode_close(AVCodecContext *avctx) |
691 |
|
|
{ |
692 |
|
✗ |
MV30Context *s = avctx->priv_data; |
693 |
|
|
|
694 |
|
✗ |
av_frame_free(&s->prev_frame); |
695 |
|
✗ |
av_freep(&s->coeffs); |
696 |
|
✗ |
s->coeffs_size = 0; |
697 |
|
✗ |
av_freep(&s->mvectors); |
698 |
|
✗ |
s->mvectors_size = 0; |
699 |
|
|
|
700 |
|
✗ |
return 0; |
701 |
|
|
} |
702 |
|
|
|
703 |
|
|
const FFCodec ff_mv30_decoder = { |
704 |
|
|
.p.name = "mv30", |
705 |
|
|
CODEC_LONG_NAME("MidiVid 3.0"), |
706 |
|
|
.p.type = AVMEDIA_TYPE_VIDEO, |
707 |
|
|
.p.id = AV_CODEC_ID_MV30, |
708 |
|
|
.priv_data_size = sizeof(MV30Context), |
709 |
|
|
.init = decode_init, |
710 |
|
|
.close = decode_close, |
711 |
|
|
FF_CODEC_DECODE_CB(decode_frame), |
712 |
|
|
.flush = decode_flush, |
713 |
|
|
.p.capabilities = AV_CODEC_CAP_DR1, |
714 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
715 |
|
|
}; |
716 |
|
|
|