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1354 lines
41 KiB
1354 lines
41 KiB
/* |
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* MobiClip Video decoder |
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* Copyright (c) 2015-2016 Florian Nouwt |
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* Copyright (c) 2017 Adib Surani |
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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 <inttypes.h> |
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|
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#include "libavutil/avassert.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/thread.h" |
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#include "avcodec.h" |
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#include "bswapdsp.h" |
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#include "codec_internal.h" |
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#include "decode.h" |
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#include "get_bits.h" |
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#include "golomb.h" |
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#include "mathops.h" |
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#define MOBI_RL_VLC_BITS 12 |
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#define MOBI_MV_VLC_BITS 6 |
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static const uint8_t zigzag4x4_tab[] = |
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{ |
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0x00, 0x04, 0x01, 0x02, 0x05, 0x08, 0x0C, 0x09, 0x06, 0x03, 0x07, 0x0A, |
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0x0D, 0x0E, 0x0B, 0x0F |
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}; |
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static const uint8_t quant4x4_tab[][16] = |
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{ |
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{ 10, 13, 13, 10, 16, 10, 13, 13, 13, 13, 16, 10, 16, 13, 13, 16 }, |
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{ 11, 14, 14, 11, 18, 11, 14, 14, 14, 14, 18, 11, 18, 14, 14, 18 }, |
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{ 13, 16, 16, 13, 20, 13, 16, 16, 16, 16, 20, 13, 20, 16, 16, 20 }, |
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{ 14, 18, 18, 14, 23, 14, 18, 18, 18, 18, 23, 14, 23, 18, 18, 23 }, |
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{ 16, 20, 20, 16, 25, 16, 20, 20, 20, 20, 25, 16, 25, 20, 20, 25 }, |
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{ 18, 23, 23, 18, 29, 18, 23, 23, 23, 23, 29, 18, 29, 23, 23, 29 }, |
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}; |
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static const uint8_t quant8x8_tab[][64] = |
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{ |
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{ 20, 19, 19, 25, 18, 25, 19, 24, 24, 19, 20, 18, 32, 18, 20, 19, 19, 24, 24, 19, 19, 25, 18, 25, 18, 25, 18, 25, 19, 24, 24, 19, |
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19, 24, 24, 19, 18, 32, 18, 20, 18, 32, 18, 24, 24, 19, 19, 24, 24, 18, 25, 18, 25, 18, 19, 24, 24, 19, 18, 32, 18, 24, 24, 18,}, |
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{ 22, 21, 21, 28, 19, 28, 21, 26, 26, 21, 22, 19, 35, 19, 22, 21, 21, 26, 26, 21, 21, 28, 19, 28, 19, 28, 19, 28, 21, 26, 26, 21, |
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21, 26, 26, 21, 19, 35, 19, 22, 19, 35, 19, 26, 26, 21, 21, 26, 26, 19, 28, 19, 28, 19, 21, 26, 26, 21, 19, 35, 19, 26, 26, 19,}, |
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{ 26, 24, 24, 33, 23, 33, 24, 31, 31, 24, 26, 23, 42, 23, 26, 24, 24, 31, 31, 24, 24, 33, 23, 33, 23, 33, 23, 33, 24, 31, 31, 24, |
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24, 31, 31, 24, 23, 42, 23, 26, 23, 42, 23, 31, 31, 24, 24, 31, 31, 23, 33, 23, 33, 23, 24, 31, 31, 24, 23, 42, 23, 31, 31, 23,}, |
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{ 28, 26, 26, 35, 25, 35, 26, 33, 33, 26, 28, 25, 45, 25, 28, 26, 26, 33, 33, 26, 26, 35, 25, 35, 25, 35, 25, 35, 26, 33, 33, 26, |
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26, 33, 33, 26, 25, 45, 25, 28, 25, 45, 25, 33, 33, 26, 26, 33, 33, 25, 35, 25, 35, 25, 26, 33, 33, 26, 25, 45, 25, 33, 33, 25,}, |
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{ 32, 30, 30, 40, 28, 40, 30, 38, 38, 30, 32, 28, 51, 28, 32, 30, 30, 38, 38, 30, 30, 40, 28, 40, 28, 40, 28, 40, 30, 38, 38, 30, |
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30, 38, 38, 30, 28, 51, 28, 32, 28, 51, 28, 38, 38, 30, 30, 38, 38, 28, 40, 28, 40, 28, 30, 38, 38, 30, 28, 51, 28, 38, 38, 28,}, |
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{ 36, 34, 34, 46, 32, 46, 34, 43, 43, 34, 36, 32, 58, 32, 36, 34, 34, 43, 43, 34, 34, 46, 32, 46, 32, 46, 32, 46, 34, 43, 43, 34, |
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34, 43, 43, 34, 32, 58, 32, 36, 32, 58, 32, 43, 43, 34, 34, 43, 43, 32, 46, 32, 46, 32, 34, 43, 43, 34, 32, 58, 32, 43, 43, 32,}, |
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}; |
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static const uint8_t block4x4_coefficients_tab[] = |
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{ |
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15, 0, 2, 1, 4, 8, 12, 3, 11, 13, 14, 7, 10, 5, 9, 6, |
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}; |
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static const uint8_t pframe_block4x4_coefficients_tab[] = |
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{ |
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0, 4, 1, 8, 2, 12, 3, 5, 10, 15, 7, 13, 14, 11, 9, 6, |
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}; |
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static const uint8_t block8x8_coefficients_tab[] = |
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{ |
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0x00, 0x1F, 0x3F, 0x0F, 0x08, 0x04, 0x02, 0x01, 0x0B, 0x0E, 0x1B, 0x0D, |
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0x03, 0x07, 0x0C, 0x17, 0x1D, 0x0A, 0x1E, 0x05, 0x10, 0x2F, 0x37, 0x3B, |
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0x13, 0x3D, 0x3E, 0x09, 0x1C, 0x06, 0x15, 0x1A, 0x33, 0x11, 0x12, 0x14, |
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0x18, 0x20, 0x3C, 0x35, 0x19, 0x16, 0x3A, 0x30, 0x31, 0x32, 0x27, 0x34, |
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0x2B, 0x2D, 0x39, 0x38, 0x23, 0x36, 0x2E, 0x21, 0x25, 0x22, 0x24, 0x2C, |
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0x2A, 0x28, 0x29, 0x26, |
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}; |
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static const uint8_t pframe_block8x8_coefficients_tab[] = |
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{ |
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0x00, 0x0F, 0x04, 0x01, 0x08, 0x02, 0x0C, 0x03, 0x05, 0x0A, 0x0D, 0x07, 0x0E, 0x0B, 0x1F, 0x09, |
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0x06, 0x10, 0x3F, 0x1E, 0x17, 0x1D, 0x1B, 0x1C, 0x13, 0x18, 0x1A, 0x12, 0x11, 0x14, 0x15, 0x20, |
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0x2F, 0x16, 0x19, 0x37, 0x3D, 0x3E, 0x3B, 0x3C, 0x33, 0x35, 0x21, 0x24, 0x22, 0x28, 0x23, 0x2C, |
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0x30, 0x27, 0x2D, 0x25, 0x3A, 0x2B, 0x2E, 0x2A, 0x31, 0x34, 0x38, 0x32, 0x29, 0x26, 0x39, 0x36 |
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}; |
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static const uint8_t run_residue[2][256] = |
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{ |
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{ |
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12, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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1, 27, 11, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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}, |
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{ |
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27, 10, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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8, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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1, 15, 10, 8, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 21, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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}, |
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}; |
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static const uint8_t bits0[] = { |
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9, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, |
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10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, |
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12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 10, 10, 9, |
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, |
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9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, |
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8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, |
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6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 3, 4, 4, |
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}; |
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static const uint16_t syms0[] = { |
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0x0, 0x822, 0x803, 0xB, 0xA, 0xB81, 0xB61, 0xB41, 0xB21, 0x122, |
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0x102, 0xE2, 0xC2, 0xA2, 0x63, 0x43, 0x24, 0xC, 0x25, 0x2E1, 0x301, |
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0xBA1, 0xBC1, 0xBE1, 0xC01, 0x26, 0x44, 0x83, 0xA3, 0xC3, 0x142, |
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0x321, 0x341, 0xC21, 0xC41, 0xC61, 0xC81, 0xCA1, 0xCC1, 0xCE1, 0xD01, |
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0x0, 0x9, 0x8, 0xB01, 0xAE1, 0xAC1, 0xAA1, 0xA81, 0xA61, 0xA41, 0xA21, |
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0x802, 0x2C1, 0x2A1, 0x281, 0x261, 0x241, 0x221, 0x201, 0x1E1, 0x82, |
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0x62, 0x7, 0x6, 0xA01, 0x9E1, 0x9C1, 0x9A1, 0x981, 0x961, 0x941, 0x921, |
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0x1C1, 0x1A1, 0x42, 0x23, 0x5, 0x901, 0x8E1, 0x8C1, 0x8A1, 0x181, 0x161, |
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0x141, 0x4, 0x881, 0x861, 0x841, 0x821, 0x121, 0x101, 0xE1, 0xC1, 0x22, |
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0x3, 0xA1, 0x81, 0x61, 0x801, 0x1, 0x21, 0x41, 0x2, |
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}; |
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static const uint16_t syms1[] = { |
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0x0, 0x807, 0x806, 0x16, 0x15, 0x842, 0x823, 0x805, 0x1A1, 0xA3, 0x102, 0x83, |
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0x64, 0x44, 0x27, 0x14, 0x13, 0x17, 0x18, 0x28, 0x122, 0x862, 0x882, 0x9E1, 0xA01, |
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0x19, 0x1A, 0x1B, 0x29, 0xC3, 0x2A, 0x45, 0xE3, 0x1C1, 0x808, 0x8A2, 0x8C2, 0xA21, |
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0xA41, 0xA61, 0xA81, 0x0, 0x12, 0x11, 0x9C1, 0x9A1, 0x981, 0x961, 0x941, 0x822, 0x804, |
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0x181, 0x161, 0xE2, 0xC2, 0xA2, 0x63, 0x43, 0x26, 0x25, 0x10, 0x82, 0xF, 0xE, 0xD, 0x901, |
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0x8E1, 0x8C1, 0x803, 0x141, 0x121, 0x101, 0x921, 0x62, 0x24, 0xC, 0xB, 0xA, 0x881, 0x861, |
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0xC1, 0x8A1, 0xE1, 0x42, 0x23, 0x9, 0x802, 0xA1, 0x841, 0x821, 0x81, 0x61, 0x8, 0x7, 0x22, |
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0x6, 0x41, 0x5, 0x4, 0x801, 0x1, 0x2, 0x21, 0x3, |
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}; |
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static const uint8_t mv_len[16] = |
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{ |
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10, 8, 8, 7, 8, 8, 8, 7, 8, 8, 8, 7, 7, 7, 7, 6, |
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}; |
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static const uint8_t mv_bits[2][16][10] = |
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{ |
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{ |
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{ 2, 3, 3, 5, 5, 4, 4, 5, 5, 2 }, |
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{ 2, 3, 4, 4, 3, 4, 4, 2 }, |
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{ 3, 4, 4, 2, 4, 4, 3, 2 }, |
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{ 1, 3, 4, 5, 5, 3, 3 }, |
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{ 2, 4, 4, 3, 3, 4, 4, 2 }, |
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{ 2, 3, 4, 4, 4, 4, 3, 2 }, |
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{ 2, 3, 4, 4, 4, 4, 3, 2 }, |
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{ 2, 2, 3, 4, 5, 5, 2 }, |
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{ 2, 3, 4, 4, 3, 4, 4, 2 }, |
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{ 2, 4, 4, 3, 4, 4, 3, 2 }, |
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{ 2, 3, 3, 5, 5, 4, 3, 2 }, |
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{ 2, 3, 4, 4, 3, 3, 2 }, |
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{ 1, 4, 4, 3, 3, 4, 4 }, |
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{ 2, 3, 4, 4, 3, 3, 2 }, |
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{ 2, 3, 4, 4, 3, 3, 2 }, |
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{ 3, 3, 2, 2, 3, 3 }, |
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}, |
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{ |
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{ 3, 4, 5, 5, 3, 5, 6, 6, 4, 1 }, |
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{ 2, 3, 4, 5, 5, 2, 3, 3 }, |
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{ 2, 4, 4, 3, 3, 4, 4, 2 }, |
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{ 1, 4, 4, 3, 4, 4, 3 }, |
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{ 3, 3, 2, 4, 5, 5, 3, 2 }, |
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{ 3, 4, 4, 3, 3, 3, 3, 2 }, |
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{ 1, 3, 3, 4, 4, 4, 5, 5 }, |
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{ 1, 4, 4, 3, 3, 4, 4 }, |
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{ 2, 4, 4, 3, 3, 4, 4, 2 }, |
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{ 1, 3, 3, 4, 4, 4, 5, 5 }, |
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{ 2, 3, 4, 4, 4, 4, 3, 2 }, |
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{ 2, 3, 3, 4, 4, 3, 2 }, |
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{ 1, 4, 4, 3, 3, 4, 4 }, |
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{ 1, 4, 4, 3, 3, 4, 4 }, |
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{ 2, 3, 3, 4, 4, 3, 2 }, |
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{ 2, 3, 3, 3, 3, 2 }, |
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} |
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}; |
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static const uint8_t mv_syms[2][16][10] = |
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{ |
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{ |
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{ 1, 8, 9, 4, 3, 2, 7, 5, 6, 0 }, |
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{ 0, 9, 5, 4, 2, 3, 8, 1 }, |
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{ 3, 9, 5, 0, 4, 8, 2, 1 }, |
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{ 1, 3, 4, 8, 5, 2, 0 }, |
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{ 0, 5, 4, 8, 2, 3, 9, 1 }, |
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{ 0, 3, 5, 9, 4, 8, 2, 1 }, |
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{ 0, 3, 9, 5, 8, 4, 2, 1 }, |
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{ 0, 2, 3, 4, 8, 5, 1 }, |
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{ 0, 3, 8, 4, 2, 5, 9, 1 }, |
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{ 2, 8, 9, 3, 5, 4, 0, 1 }, |
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{ 0, 4, 3, 8, 9, 5, 2, 1 }, |
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{ 0, 4, 8, 5, 3, 2, 1 }, |
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{ 1, 9, 4, 2, 0, 5, 3 }, |
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{ 2, 4, 9, 5, 3, 0, 1 }, |
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{ 0, 4, 9, 5, 3, 2, 1 }, |
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{ 5, 4, 1, 0, 3, 2 }, |
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}, |
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{ |
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{ 8, 2, 3, 6, 1, 7, 5, 4, 9, 0 }, |
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{ 9, 2, 3, 5, 4, 1, 8, 0 }, |
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{ 0, 5, 4, 2, 9, 3, 8, 1 }, |
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{ 1, 5, 4, 2, 8, 3, 0 }, |
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{ 2, 9, 8, 3, 5, 4, 0, 1 }, |
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{ 3, 5, 4, 2, 9, 8, 0, 1 }, |
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{ 1, 2, 0, 9, 8, 3, 5, 4 }, |
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{ 1, 8, 5, 2, 0, 4, 3 }, |
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{ 0, 5, 4, 2, 8, 3, 9, 1 }, |
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{ 1, 2, 0, 9, 8, 3, 5, 4 }, |
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{ 0, 3, 9, 8, 5, 4, 2, 1 }, |
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{ 0, 4, 3, 8, 5, 2, 1 }, |
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{ 1, 5, 4, 2, 0, 9, 3 }, |
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{ 1, 9, 5, 2, 0, 4, 3 }, |
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{ 0, 5, 3, 9, 4, 2, 1 }, |
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{ 0, 4, 5, 3, 2, 1 }, |
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} |
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}; |
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typedef struct BlockXY { |
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int w, h; |
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int ax, ay; |
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int x, y; |
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int size; |
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uint8_t *block; |
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int linesize; |
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} BlockXY; |
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|
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typedef struct MotionXY { |
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int x, y; |
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} MotionXY; |
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typedef struct MobiClipContext { |
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AVFrame *pic[6]; |
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|
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int current_pic; |
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int moflex; |
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int dct_tab_idx; |
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int quantizer; |
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GetBitContext gb; |
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|
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uint8_t *bitstream; |
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int bitstream_size; |
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|
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int qtab[2][64]; |
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uint8_t pre[32]; |
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MotionXY *motion; |
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int motion_size; |
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|
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BswapDSPContext bdsp; |
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} MobiClipContext; |
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static const VLCElem *rl_vlc[2]; |
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static const VLCElem *mv_vlc[2][16]; |
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|
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static av_cold void mobiclip_init_static(void) |
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{ |
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static VLCElem vlc_buf[(2 << MOBI_RL_VLC_BITS) + (2 * 16 << MOBI_MV_VLC_BITS)]; |
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VLCInitState state =VLC_INIT_STATE(vlc_buf); |
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|
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for (int i = 0; i < 2; i++) { |
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rl_vlc[i] = |
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ff_vlc_init_tables_from_lengths(&state, MOBI_RL_VLC_BITS, 104, |
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bits0, sizeof(*bits0), |
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i ? syms1 : syms0, sizeof(*syms0), sizeof(*syms0), |
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0, 0); |
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for (int j = 0; j < 16; j++) { |
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mv_vlc[i][j] = |
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ff_vlc_init_tables_from_lengths(&state, MOBI_MV_VLC_BITS, mv_len[j], |
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mv_bits[i][j], sizeof(*mv_bits[i][j]), |
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mv_syms[i][j], sizeof(*mv_syms[i][j]), sizeof(*mv_syms[i][j]), |
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0, 0); |
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} |
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} |
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} |
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|
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static av_cold int mobiclip_init(AVCodecContext *avctx) |
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{ |
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static AVOnce init_static_once = AV_ONCE_INIT; |
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MobiClipContext *s = avctx->priv_data; |
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|
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if (avctx->width & 15 || avctx->height & 15) { |
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av_log(avctx, AV_LOG_ERROR, "width/height not multiple of 16\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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|
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ff_bswapdsp_init(&s->bdsp); |
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|
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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|
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s->motion = av_calloc(avctx->width / 16 + 3, sizeof(MotionXY)); |
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if (!s->motion) |
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return AVERROR(ENOMEM); |
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s->motion_size = (avctx->width / 16 + 3) * sizeof(MotionXY); |
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|
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for (int i = 0; i < 6; i++) { |
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s->pic[i] = av_frame_alloc(); |
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if (!s->pic[i]) |
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return AVERROR(ENOMEM); |
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} |
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|
|
ff_thread_once(&init_static_once, mobiclip_init_static); |
|
|
|
return 0; |
|
} |
|
|
|
static int setup_qtables(AVCodecContext *avctx, int64_t quantizer) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
int qx, qy; |
|
|
|
if (quantizer < 12 || quantizer > 161) |
|
return AVERROR_INVALIDDATA; |
|
|
|
s->quantizer = quantizer; |
|
|
|
qx = quantizer % 6; |
|
qy = quantizer / 6; |
|
|
|
for (int i = 0; i < 16; i++) |
|
s->qtab[0][i] = quant4x4_tab[qx][i] << qy; |
|
|
|
for (int i = 0; i < 64; i++) |
|
s->qtab[1][i] = quant8x8_tab[qx][i] << (qy - 2); |
|
|
|
for (int i = 0; i < 20; i++) |
|
s->pre[i] = 9; |
|
|
|
return 0; |
|
} |
|
|
|
static void inverse4(unsigned *rs) |
|
{ |
|
unsigned a = rs[0] + rs[2]; |
|
unsigned b = rs[0] - rs[2]; |
|
unsigned c = rs[1] + ((int)rs[3] >> 1); |
|
unsigned d = ((int)rs[1] >> 1) - rs[3]; |
|
|
|
rs[0] = a + c; |
|
rs[1] = b + d; |
|
rs[2] = b - d; |
|
rs[3] = a - c; |
|
} |
|
|
|
static void idct(int *arr, int size) |
|
{ |
|
int e, f, g, h; |
|
unsigned x3, x2, x1, x0; |
|
int tmp[4]; |
|
|
|
if (size == 4) { |
|
inverse4(arr); |
|
return; |
|
} |
|
|
|
tmp[0] = arr[0]; |
|
tmp[1] = arr[2]; |
|
tmp[2] = arr[4]; |
|
tmp[3] = arr[6]; |
|
|
|
inverse4(tmp); |
|
|
|
e = (unsigned)arr[7] + arr[1] - arr[3] - (arr[3] >> 1); |
|
f = (unsigned)arr[7] - arr[1] + arr[5] + (arr[5] >> 1); |
|
g = (unsigned)arr[5] - arr[3] - arr[7] - (arr[7] >> 1); |
|
h = (unsigned)arr[5] + arr[3] + arr[1] + (arr[1] >> 1); |
|
x3 = (unsigned)g + (h >> 2); |
|
x2 = (unsigned)e + (f >> 2); |
|
x1 = (e >> 2) - (unsigned)f; |
|
x0 = (unsigned)h - (g >> 2); |
|
|
|
arr[0] = tmp[0] + x0; |
|
arr[1] = tmp[1] + x1; |
|
arr[2] = tmp[2] + x2; |
|
arr[3] = tmp[3] + x3; |
|
arr[4] = tmp[3] - x3; |
|
arr[5] = tmp[2] - x2; |
|
arr[6] = tmp[1] - x1; |
|
arr[7] = tmp[0] - x0; |
|
} |
|
|
|
static void read_run_encoding(AVCodecContext *avctx, |
|
int *last, int *run, int *level) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int n = get_vlc2(gb, rl_vlc[s->dct_tab_idx], MOBI_RL_VLC_BITS, 1); |
|
|
|
*last = (n >> 11) == 1; |
|
*run = (n >> 5) & 0x3F; |
|
*level = n & 0x1F; |
|
} |
|
|
|
static int add_coefficients(AVCodecContext *avctx, AVFrame *frame, |
|
int bx, int by, int size, int plane) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int mat[64] = { 0 }; |
|
const uint8_t *ztab = size == 8 ? ff_zigzag_direct : zigzag4x4_tab; |
|
const int *qtab = s->qtab[size == 8]; |
|
uint8_t *dst = frame->data[plane] + by * frame->linesize[plane] + bx; |
|
|
|
for (int pos = 0; get_bits_left(gb) > 0; pos++) { |
|
int qval, last, run, level; |
|
|
|
read_run_encoding(avctx, &last, &run, &level); |
|
|
|
if (level) { |
|
if (get_bits1(gb)) |
|
level = -level; |
|
} else if (!get_bits1(gb)) { |
|
read_run_encoding(avctx, &last, &run, &level); |
|
level += run_residue[s->dct_tab_idx][(last ? 64 : 0) + run]; |
|
if (get_bits1(gb)) |
|
level = -level; |
|
} else if (!get_bits1(gb)) { |
|
read_run_encoding(avctx, &last, &run, &level); |
|
run += run_residue[s->dct_tab_idx][128 + (last ? 64 : 0) + level]; |
|
if (get_bits1(gb)) |
|
level = -level; |
|
} else { |
|
last = get_bits1(gb); |
|
run = get_bits(gb, 6); |
|
level = get_sbits(gb, 12); |
|
} |
|
|
|
pos += run; |
|
if (pos >= size * size) |
|
return AVERROR_INVALIDDATA; |
|
qval = qtab[pos]; |
|
mat[ztab[pos]] = qval *(unsigned)level; |
|
|
|
if (last) |
|
break; |
|
} |
|
|
|
mat[0] += 32; |
|
for (int y = 0; y < size; y++) |
|
idct(&mat[y * size], size); |
|
|
|
for (int y = 0; y < size; y++) { |
|
for (int x = y + 1; x < size; x++) { |
|
int a = mat[x * size + y]; |
|
int b = mat[y * size + x]; |
|
|
|
mat[y * size + x] = a; |
|
mat[x * size + y] = b; |
|
} |
|
|
|
idct(&mat[y * size], size); |
|
for (int x = 0; x < size; x++) |
|
dst[x] = av_clip_uint8(dst[x] + (mat[y * size + x] >> 6)); |
|
dst += frame->linesize[plane]; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int add_pframe_coefficients(AVCodecContext *avctx, AVFrame *frame, |
|
int bx, int by, int size, int plane) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int ret, idx = get_ue_golomb_31(gb); |
|
|
|
if (idx == 0) { |
|
return add_coefficients(avctx, frame, bx, by, size, plane); |
|
} else if ((unsigned)idx < FF_ARRAY_ELEMS(pframe_block4x4_coefficients_tab)) { |
|
int flags = pframe_block4x4_coefficients_tab[idx]; |
|
|
|
for (int y = by; y < by + 8; y += 4) { |
|
for (int x = bx; x < bx + 8; x += 4) { |
|
if (flags & 1) { |
|
ret = add_coefficients(avctx, frame, x, y, 4, plane); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
flags >>= 1; |
|
} |
|
} |
|
return 0; |
|
} else { |
|
return AVERROR_INVALIDDATA; |
|
} |
|
} |
|
|
|
static int adjust(int x, int size) |
|
{ |
|
return size == 16 ? (x + 1) >> 1 : x; |
|
} |
|
|
|
static uint8_t pget(BlockXY b) |
|
{ |
|
BlockXY ret = b; |
|
int x, y; |
|
|
|
if (b.x == -1 && b.y >= b.size) { |
|
ret.x = -1, ret.y = b.size - 1; |
|
} else if (b.x >= -1 && b.y >= -1) { |
|
ret.x = b.x, ret.y = b.y; |
|
} else if (b.x == -1 && b.y == -2) { |
|
ret.x = 0, ret.y = -1; |
|
} else if (b.x == -2 && b.y == -1) { |
|
ret.x = -1, ret.y = 0; |
|
} |
|
|
|
y = av_clip(ret.ay + ret.y, 0, ret.h - 1); |
|
x = av_clip(ret.ax + ret.x, 0, ret.w - 1); |
|
|
|
return ret.block[y * ret.linesize + x]; |
|
} |
|
|
|
static uint8_t half(int a, int b) |
|
{ |
|
return ((a + b) + 1) / 2; |
|
} |
|
|
|
static uint8_t half3(int a, int b, int c) |
|
{ |
|
return ((a + b + b + c) * 2 / 4 + 1) / 2; |
|
} |
|
|
|
static uint8_t pick_above(BlockXY bxy) |
|
{ |
|
bxy.y = bxy.y - 1; |
|
|
|
return pget(bxy); |
|
} |
|
|
|
static uint8_t pick_left(BlockXY bxy) |
|
{ |
|
bxy.x = bxy.x - 1; |
|
|
|
return pget(bxy); |
|
} |
|
|
|
static uint8_t half_horz(BlockXY bxy) |
|
{ |
|
BlockXY a = bxy, b = bxy, c = bxy; |
|
|
|
a.x -= 1; |
|
c.x += 1; |
|
|
|
return half3(pget(a), pget(b), pget(c)); |
|
} |
|
|
|
static uint8_t half_vert(BlockXY bxy) |
|
{ |
|
BlockXY a = bxy, b = bxy, c = bxy; |
|
|
|
a.y -= 1; |
|
c.y += 1; |
|
|
|
return half3(pget(a), pget(b), pget(c)); |
|
} |
|
|
|
static uint8_t pick_4(BlockXY bxy) |
|
{ |
|
int val; |
|
|
|
if ((bxy.x % 2) == 0) { |
|
BlockXY ba, bb; |
|
int a, b; |
|
|
|
ba = bxy; |
|
ba.x = -1; |
|
ba.y = bxy.y + bxy.x / 2; |
|
a = pget(ba); |
|
|
|
bb = bxy; |
|
bb.x = -1; |
|
bb.y = bxy.y + bxy.x / 2 + 1; |
|
b = pget(bb); |
|
|
|
val = half(a, b); |
|
} else { |
|
BlockXY ba; |
|
|
|
ba = bxy; |
|
ba.x = -1; |
|
ba.y = bxy.y + bxy.x / 2 + 1; |
|
val = half_vert(ba); |
|
} |
|
|
|
return val; |
|
} |
|
|
|
static uint8_t pick_5(BlockXY bxy) |
|
{ |
|
int val; |
|
|
|
if (bxy.x == 0) { |
|
BlockXY a = bxy; |
|
BlockXY b = bxy; |
|
|
|
a.x = -1; |
|
a.y -= 1; |
|
|
|
b.x = -1; |
|
|
|
val = half(pget(a), pget(b)); |
|
} else if (bxy.y == 0) { |
|
BlockXY a = bxy; |
|
|
|
a.x -= 2; |
|
a.y -= 1; |
|
|
|
val = half_horz(a); |
|
} else if (bxy.x == 1) { |
|
BlockXY a = bxy; |
|
|
|
a.x -= 2; |
|
a.y -= 1; |
|
|
|
val = half_vert(a); |
|
} else { |
|
BlockXY a = bxy; |
|
|
|
a.x -= 2; |
|
a.y -= 1; |
|
|
|
val = pget(a); |
|
} |
|
|
|
return val; |
|
} |
|
|
|
static uint8_t pick_6(BlockXY bxy) |
|
{ |
|
int val; |
|
|
|
if (bxy.y == 0) { |
|
BlockXY a = bxy; |
|
BlockXY b = bxy; |
|
|
|
a.x -= 1; |
|
a.y = -1; |
|
|
|
b.y = -1; |
|
|
|
val = half(pget(a), pget(b)); |
|
} else if (bxy.x == 0) { |
|
BlockXY a = bxy; |
|
|
|
a.x -= 1; |
|
a.y -= 2; |
|
|
|
val = half_vert(a); |
|
} else if (bxy.y == 1) { |
|
BlockXY a = bxy; |
|
|
|
a.x -= 1; |
|
a.y -= 2; |
|
|
|
val = half_horz(a); |
|
} else { |
|
BlockXY a = bxy; |
|
|
|
a.x -= 1; |
|
a.y -= 2; |
|
|
|
val = pget(a); |
|
} |
|
|
|
return val; |
|
} |
|
|
|
static uint8_t pick_7(BlockXY bxy) |
|
{ |
|
int clr, acc1, acc2; |
|
BlockXY a = bxy; |
|
|
|
a.x -= 1; |
|
a.y -= 1; |
|
clr = pget(a); |
|
if (bxy.x && bxy.y) |
|
return clr; |
|
|
|
if (bxy.x == 0) { |
|
a.x = -1; |
|
a.y = bxy.y; |
|
} else { |
|
a.x = bxy.x - 2; |
|
a.y = -1; |
|
} |
|
acc1 = pget(a); |
|
|
|
if (bxy.y == 0) { |
|
a.x = bxy.x; |
|
a.y = -1; |
|
} else { |
|
a.x = -1; |
|
a.y = bxy.y - 2; |
|
} |
|
acc2 = pget(a); |
|
|
|
return half3(acc1, clr, acc2); |
|
} |
|
|
|
static uint8_t pick_8(BlockXY bxy) |
|
{ |
|
BlockXY ba = bxy; |
|
BlockXY bb = bxy; |
|
int val; |
|
|
|
if (bxy.y == 0) { |
|
int a, b; |
|
|
|
ba.y = -1; |
|
a = pget(ba); |
|
|
|
bb.x += 1; |
|
bb.y = -1; |
|
|
|
b = pget(bb); |
|
|
|
val = half(a, b); |
|
} else if (bxy.y == 1) { |
|
ba.x += 1; |
|
ba.y -= 2; |
|
|
|
val = half_horz(ba); |
|
} else if (bxy.x < bxy.size - 1) { |
|
ba.x += 1; |
|
ba.y -= 2; |
|
|
|
val = pget(ba); |
|
} else if (bxy.y % 2 == 0) { |
|
int a, b; |
|
|
|
ba.x = bxy.y / 2 + bxy.size - 1; |
|
ba.y = -1; |
|
a = pget(ba); |
|
|
|
bb.x = bxy.y / 2 + bxy.size; |
|
bb.y = -1; |
|
|
|
b = pget(bb); |
|
|
|
val = half(a, b); |
|
} else { |
|
ba.x = bxy.y / 2 + bxy.size; |
|
ba.y = -1; |
|
|
|
val = half_horz(ba); |
|
} |
|
|
|
return val; |
|
} |
|
|
|
static void block_fill_simple(uint8_t *block, int size, int linesize, int fill) |
|
{ |
|
for (int y = 0; y < size; y++) { |
|
memset(block, fill, size); |
|
block += linesize; |
|
} |
|
} |
|
|
|
static void block_fill(uint8_t *block, int size, int linesize, |
|
int w, int h, int ax, int ay, |
|
uint8_t (*pick)(BlockXY bxy)) |
|
{ |
|
BlockXY bxy; |
|
|
|
bxy.size = size; |
|
bxy.block = block; |
|
bxy.linesize = linesize; |
|
bxy.w = w; |
|
bxy.h = h; |
|
bxy.ay = ay; |
|
bxy.ax = ax; |
|
|
|
for (int y = 0; y < size; y++) { |
|
bxy.y = y; |
|
for (int x = 0; x < size; x++) { |
|
uint8_t val; |
|
|
|
bxy.x = x; |
|
|
|
val = pick(bxy); |
|
|
|
block[ax + x + (ay + y) * linesize] = val; |
|
} |
|
} |
|
} |
|
|
|
static int block_sum(const uint8_t *block, int w, int h, int linesize) |
|
{ |
|
int sum = 0; |
|
|
|
for (int y = 0; y < h; y++) { |
|
for (int x = 0; x < w; x++) { |
|
sum += block[x]; |
|
} |
|
block += linesize; |
|
} |
|
|
|
return sum; |
|
} |
|
|
|
static int predict_intra(AVCodecContext *avctx, AVFrame *frame, int ax, int ay, |
|
int pmode, int add_coeffs, int size, int plane) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int w = avctx->width >> !!plane, h = avctx->height >> !!plane; |
|
int ret = 0; |
|
|
|
switch (pmode) { |
|
case 0: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_above); |
|
break; |
|
case 1: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_left); |
|
break; |
|
case 2: |
|
{ |
|
int arr1[16]; |
|
int arr2[16]; |
|
uint8_t *top = frame->data[plane] + FFMAX(ay - 1, 0) * frame->linesize[plane] + ax; |
|
uint8_t *left = frame->data[plane] + ay * frame->linesize[plane] + FFMAX(ax - 1, 0); |
|
int bottommost = frame->data[plane][(ay + size - 1) * frame->linesize[plane] + FFMAX(ax - 1, 0)]; |
|
int rightmost = frame->data[plane][FFMAX(ay - 1, 0) * frame->linesize[plane] + ax + size - 1]; |
|
int avg = (bottommost + rightmost + 1) / 2 + 2 * av_clip(get_se_golomb(gb), -(1<<16), 1<<16); |
|
int r6 = adjust(avg - bottommost, size); |
|
int r9 = adjust(avg - rightmost, size); |
|
int shift = adjust(size, size) == 8 ? 3 : 2; |
|
uint8_t *block; |
|
|
|
for (int x = 0; x < size; x++) { |
|
int val = top[x]; |
|
arr1[x] = adjust(((bottommost - val) * (1 << shift)) + r6 * (x + 1), size); |
|
} |
|
|
|
for (int y = 0; y < size; y++) { |
|
int val = left[y * frame->linesize[plane]]; |
|
arr2[y] = adjust(((rightmost - val) * (1 << shift)) + r9 * (y + 1), size); |
|
} |
|
|
|
block = frame->data[plane] + ay * frame->linesize[plane] + ax; |
|
for (int y = 0; y < size; y++) { |
|
for (int x = 0; x < size; x++) { |
|
block[x] = (((top[x] + left[0] + ((arr1[x] * (y + 1) + |
|
arr2[y] * (x + 1)) >> 2 * shift)) + 1) / 2) & 0xFF; |
|
} |
|
block += frame->linesize[plane]; |
|
left += frame->linesize[plane]; |
|
} |
|
} |
|
break; |
|
case 3: |
|
{ |
|
uint8_t fill; |
|
|
|
if (ax == 0 && ay == 0) { |
|
fill = 0x80; |
|
} else if (ax >= 1 && ay >= 1) { |
|
int left = block_sum(frame->data[plane] + ay * frame->linesize[plane] + ax - 1, |
|
1, size, frame->linesize[plane]); |
|
int top = block_sum(frame->data[plane] + (ay - 1) * frame->linesize[plane] + ax, |
|
size, 1, frame->linesize[plane]); |
|
|
|
fill = ((left + top) * 2 / (2 * size) + 1) / 2; |
|
} else if (ax >= 1) { |
|
fill = (block_sum(frame->data[plane] + ay * frame->linesize[plane] + ax - 1, |
|
1, size, frame->linesize[plane]) * 2 / size + 1) / 2; |
|
} else if (ay >= 1) { |
|
fill = (block_sum(frame->data[plane] + (ay - 1) * frame->linesize[plane] + ax, |
|
size, 1, frame->linesize[plane]) * 2 / size + 1) / 2; |
|
} else { |
|
return -1; |
|
} |
|
|
|
block_fill_simple(frame->data[plane] + ay * frame->linesize[plane] + ax, |
|
size, frame->linesize[plane], fill); |
|
} |
|
break; |
|
case 4: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_4); |
|
break; |
|
case 5: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_5); |
|
break; |
|
case 6: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_6); |
|
break; |
|
case 7: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_7); |
|
break; |
|
case 8: |
|
block_fill(frame->data[plane], size, frame->linesize[plane], w, h, ax, ay, pick_8); |
|
break; |
|
} |
|
|
|
if (add_coeffs) |
|
ret = add_coefficients(avctx, frame, ax, ay, size, plane); |
|
|
|
return ret; |
|
} |
|
|
|
static int get_prediction(AVCodecContext *avctx, int x, int y, int size) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int index = (y & 0xC) | (x / 4 % 4); |
|
|
|
uint8_t val = FFMIN(s->pre[index], index % 4 == 0 ? 9 : s->pre[index + 3]); |
|
if (val == 9) |
|
val = 3; |
|
|
|
if (!get_bits1(gb)) { |
|
int x = get_bits(gb, 3); |
|
val = x + (x >= val ? 1 : 0); |
|
} |
|
|
|
s->pre[index + 4] = val; |
|
if (size == 8) |
|
s->pre[index + 5] = s->pre[index + 8] = s->pre[index + 9] = val; |
|
|
|
return val; |
|
} |
|
|
|
static int process_block(AVCodecContext *avctx, AVFrame *frame, |
|
int x, int y, int pmode, int has_coeffs, int plane) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int tmp, ret; |
|
|
|
if (!has_coeffs) { |
|
if (pmode < 0) |
|
pmode = get_prediction(avctx, x, y, 8); |
|
return predict_intra(avctx, frame, x, y, pmode, 0, 8, plane); |
|
} |
|
|
|
tmp = get_ue_golomb_31(gb); |
|
if ((unsigned)tmp > FF_ARRAY_ELEMS(block4x4_coefficients_tab)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if (tmp == 0) { |
|
if (pmode < 0) |
|
pmode = get_prediction(avctx, x, y, 8); |
|
ret = predict_intra(avctx, frame, x, y, pmode, 1, 8, plane); |
|
} else { |
|
int flags = block4x4_coefficients_tab[tmp - 1]; |
|
|
|
for (int by = y; by < y + 8; by += 4) { |
|
for (int bx = x; bx < x + 8; bx += 4) { |
|
int new_pmode = pmode; |
|
|
|
if (new_pmode < 0) |
|
new_pmode = get_prediction(avctx, bx, by, 4); |
|
ret = predict_intra(avctx, frame, bx, by, new_pmode, flags & 1, 4, plane); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
} |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int decode_macroblock(AVCodecContext *avctx, AVFrame *frame, |
|
int x, int y, int predict) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
int flags, pmode_uv, idx = get_ue_golomb(gb); |
|
int ret = 0; |
|
|
|
if (idx < 0 || idx >= FF_ARRAY_ELEMS(block8x8_coefficients_tab)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
flags = block8x8_coefficients_tab[idx]; |
|
|
|
if (predict) { |
|
ret = process_block(avctx, frame, x, y, -1, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x + 8, y, -1, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x, y + 8, -1, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x + 8, y + 8, -1, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
} else { |
|
int pmode = get_bits(gb, 3); |
|
|
|
if (pmode == 2) { |
|
ret = predict_intra(avctx, frame, x, y, pmode, 0, 16, 0); |
|
if (ret < 0) |
|
return ret; |
|
pmode = 9; |
|
} |
|
|
|
ret = process_block(avctx, frame, x, y, pmode, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x + 8, y, pmode, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x, y + 8, pmode, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x + 8, y + 8, pmode, flags & 1, 0); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
} |
|
|
|
pmode_uv = get_bits(gb, 3); |
|
if (pmode_uv == 2) { |
|
ret = predict_intra(avctx, frame, x >> 1, y >> 1, pmode_uv, 0, 8, 1 + !s->moflex); |
|
if (ret < 0) |
|
return ret; |
|
ret = predict_intra(avctx, frame, x >> 1, y >> 1, pmode_uv, 0, 8, 2 - !s->moflex); |
|
if (ret < 0) |
|
return ret; |
|
pmode_uv = 9; |
|
} |
|
|
|
ret = process_block(avctx, frame, x >> 1, y >> 1, pmode_uv, flags & 1, 1 + !s->moflex); |
|
if (ret < 0) |
|
return ret; |
|
flags >>= 1; |
|
ret = process_block(avctx, frame, x >> 1, y >> 1, pmode_uv, flags & 1, 2 - !s->moflex); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int get_index(int x) |
|
{ |
|
return x == 16 ? 0 : x == 8 ? 1 : x == 4 ? 2 : x == 2 ? 3 : 0; |
|
} |
|
|
|
static int predict_motion(AVCodecContext *avctx, |
|
int width, int height, int index, |
|
int offsetm, int offsetx, int offsety) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
MotionXY *motion = s->motion; |
|
GetBitContext *gb = &s->gb; |
|
int fheight = avctx->height; |
|
int fwidth = avctx->width; |
|
|
|
if (index <= 5) { |
|
int sidx = -FFMAX(1, index) + s->current_pic; |
|
MotionXY mv = s->motion[0]; |
|
|
|
if (sidx < 0) |
|
sidx += 6; |
|
|
|
if (index > 0) { |
|
mv.x = mv.x + (unsigned)get_se_golomb(gb); |
|
mv.y = mv.y + (unsigned)get_se_golomb(gb); |
|
} |
|
if (mv.x >= INT_MAX || mv.y >= INT_MAX) |
|
return AVERROR_INVALIDDATA; |
|
|
|
motion[offsetm].x = mv.x; |
|
motion[offsetm].y = mv.y; |
|
|
|
for (int i = 0; i < 3; i++) { |
|
int method, src_linesize, dst_linesize; |
|
uint8_t *src, *dst; |
|
|
|
if (i == 1) { |
|
offsetx = offsetx >> 1; |
|
offsety = offsety >> 1; |
|
mv.x = mv.x >> 1; |
|
mv.y = mv.y >> 1; |
|
width = width >> 1; |
|
height = height >> 1; |
|
fwidth = fwidth >> 1; |
|
fheight = fheight >> 1; |
|
} |
|
|
|
av_assert0(s->pic[sidx]); |
|
av_assert0(s->pic[s->current_pic]); |
|
av_assert0(s->pic[s->current_pic]->data[i]); |
|
if (!s->pic[sidx]->data[i]) |
|
return AVERROR_INVALIDDATA; |
|
|
|
method = (mv.x & 1) | ((mv.y & 1) << 1); |
|
src_linesize = s->pic[sidx]->linesize[i]; |
|
dst_linesize = s->pic[s->current_pic]->linesize[i]; |
|
dst = s->pic[s->current_pic]->data[i] + offsetx + offsety * dst_linesize; |
|
|
|
if (offsetx + (mv.x >> 1) < 0 || |
|
offsety + (mv.y >> 1) < 0 || |
|
offsetx + width + (mv.x + 1 >> 1) > fwidth || |
|
offsety + height + (mv.y + 1 >> 1) > fheight) |
|
return AVERROR_INVALIDDATA; |
|
|
|
switch (method) { |
|
case 0: |
|
src = s->pic[sidx]->data[i] + offsetx + (mv.x >> 1) + |
|
(offsety + (mv.y >> 1)) * src_linesize; |
|
for (int y = 0; y < height; y++) { |
|
for (int x = 0; x < width; x++) |
|
dst[x] = src[x]; |
|
dst += dst_linesize; |
|
src += src_linesize; |
|
} |
|
break; |
|
case 1: |
|
src = s->pic[sidx]->data[i] + offsetx + (mv.x >> 1) + |
|
(offsety + (mv.y >> 1)) * src_linesize; |
|
for (int y = 0; y < height; y++) { |
|
for (int x = 0; x < width; x++) { |
|
dst[x] = (uint8_t)((src[x] >> 1) + (src[x + 1] >> 1)); |
|
} |
|
|
|
dst += dst_linesize; |
|
src += src_linesize; |
|
} |
|
break; |
|
case 2: |
|
src = s->pic[sidx]->data[i] + offsetx + (mv.x >> 1) + |
|
(offsety + (mv.y >> 1)) * src_linesize; |
|
for (int y = 0; y < height; y++) { |
|
for (int x = 0; x < width; x++) { |
|
dst[x] = (uint8_t)((src[x] >> 1) + (src[x + src_linesize] >> 1)); |
|
} |
|
|
|
dst += dst_linesize; |
|
src += src_linesize; |
|
} |
|
break; |
|
case 3: |
|
src = s->pic[sidx]->data[i] + offsetx + (mv.x >> 1) + |
|
(offsety + (mv.y >> 1)) * src_linesize; |
|
for (int y = 0; y < height; y++) { |
|
for (int x = 0; x < width; x++) { |
|
dst[x] = (uint8_t)((((src[x] >> 1) + (src[x + 1] >> 1)) >> 1) + |
|
(((src[x + src_linesize] >> 1) + (src[x + 1 + src_linesize] >> 1)) >> 1)); |
|
} |
|
|
|
dst += dst_linesize; |
|
src += src_linesize; |
|
} |
|
break; |
|
} |
|
} |
|
} else { |
|
int tidx; |
|
int adjx = index == 8 ? 0 : width / 2; |
|
int adjy = index == 8 ? height / 2 : 0; |
|
|
|
width = width - adjx; |
|
height = height - adjy; |
|
tidx = get_index(height) * 4 + get_index(width); |
|
|
|
for (int i = 0; i < 2; i++) { |
|
int ret, idx2; |
|
|
|
idx2 = get_vlc2(gb, mv_vlc[s->moflex][tidx], MOBI_MV_VLC_BITS, 1); |
|
|
|
ret = predict_motion(avctx, width, height, idx2, |
|
offsetm, offsetx + i * adjx, offsety + i * adjy); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mobiclip_decode(AVCodecContext *avctx, AVFrame *rframe, |
|
int *got_frame, AVPacket *pkt) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
GetBitContext *gb = &s->gb; |
|
AVFrame *frame = s->pic[s->current_pic]; |
|
int ret; |
|
|
|
if (avctx->height/16 * (avctx->width/16) * 2 > 8LL*FFALIGN(pkt->size, 2)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
av_fast_padded_malloc(&s->bitstream, &s->bitstream_size, |
|
pkt->size); |
|
|
|
if ((ret = ff_reget_buffer(avctx, frame, 0)) < 0) |
|
return ret; |
|
|
|
s->bdsp.bswap16_buf((uint16_t *)s->bitstream, |
|
(uint16_t *)pkt->data, |
|
(pkt->size + 1) >> 1); |
|
|
|
ret = init_get_bits8(gb, s->bitstream, FFALIGN(pkt->size, 2)); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (get_bits1(gb)) { |
|
frame->pict_type = AV_PICTURE_TYPE_I; |
|
frame->flags |= AV_FRAME_FLAG_KEY; |
|
s->moflex = get_bits1(gb); |
|
s->dct_tab_idx = get_bits1(gb); |
|
|
|
ret = setup_qtables(avctx, get_bits(gb, 6)); |
|
if (ret < 0) |
|
return ret; |
|
|
|
for (int y = 0; y < avctx->height; y += 16) { |
|
for (int x = 0; x < avctx->width; x += 16) { |
|
ret = decode_macroblock(avctx, frame, x, y, get_bits1(gb)); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
} |
|
} else { |
|
MotionXY *motion = s->motion; |
|
|
|
memset(motion, 0, s->motion_size); |
|
|
|
frame->pict_type = AV_PICTURE_TYPE_P; |
|
frame->flags &= ~AV_FRAME_FLAG_KEY; |
|
s->dct_tab_idx = 0; |
|
|
|
ret = setup_qtables(avctx, s->quantizer + (int64_t)get_se_golomb(gb)); |
|
if (ret < 0) |
|
return ret; |
|
|
|
for (int y = 0; y < avctx->height; y += 16) { |
|
for (int x = 0; x < avctx->width; x += 16) { |
|
int idx; |
|
|
|
motion[0].x = mid_pred(motion[x / 16 + 1].x, motion[x / 16 + 2].x, motion[x / 16 + 3].x); |
|
motion[0].y = mid_pred(motion[x / 16 + 1].y, motion[x / 16 + 2].y, motion[x / 16 + 3].y); |
|
motion[x / 16 + 2].x = 0; |
|
motion[x / 16 + 2].y = 0; |
|
|
|
idx = get_vlc2(gb, mv_vlc[s->moflex][0], MOBI_MV_VLC_BITS, 1); |
|
|
|
if (idx == 6 || idx == 7) { |
|
ret = decode_macroblock(avctx, frame, x, y, idx == 7); |
|
if (ret < 0) |
|
return ret; |
|
} else { |
|
int flags, idx2; |
|
ret = predict_motion(avctx, 16, 16, idx, x / 16 + 2, x, y); |
|
if (ret < 0) |
|
return ret; |
|
idx2 = get_ue_golomb(gb); |
|
if (idx2 >= FF_ARRAY_ELEMS(pframe_block8x8_coefficients_tab)) |
|
return AVERROR_INVALIDDATA; |
|
flags = pframe_block8x8_coefficients_tab[idx2]; |
|
|
|
for (int sy = y; sy < y + 16; sy += 8) { |
|
for (int sx = x; sx < x + 16; sx += 8) { |
|
if (flags & 1) |
|
add_pframe_coefficients(avctx, frame, sx, sy, 8, 0); |
|
flags >>= 1; |
|
} |
|
} |
|
|
|
if (flags & 1) |
|
add_pframe_coefficients(avctx, frame, x >> 1, y >> 1, 8, 1 + !s->moflex); |
|
flags >>= 1; |
|
if (flags & 1) |
|
add_pframe_coefficients(avctx, frame, x >> 1, y >> 1, 8, 2 - !s->moflex); |
|
} |
|
} |
|
} |
|
} |
|
|
|
if (!s->moflex) |
|
avctx->colorspace = AVCOL_SPC_YCGCO; |
|
|
|
s->current_pic = (s->current_pic + 1) % 6; |
|
ret = av_frame_ref(rframe, frame); |
|
if (ret < 0) |
|
return ret; |
|
*got_frame = 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void mobiclip_flush(AVCodecContext *avctx) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
|
|
for (int i = 0; i < 6; i++) |
|
av_frame_unref(s->pic[i]); |
|
} |
|
|
|
static av_cold int mobiclip_close(AVCodecContext *avctx) |
|
{ |
|
MobiClipContext *s = avctx->priv_data; |
|
|
|
av_freep(&s->bitstream); |
|
s->bitstream_size = 0; |
|
av_freep(&s->motion); |
|
s->motion_size = 0; |
|
|
|
for (int i = 0; i < 6; i++) { |
|
av_frame_free(&s->pic[i]); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
const FFCodec ff_mobiclip_decoder = { |
|
.p.name = "mobiclip", |
|
CODEC_LONG_NAME("MobiClip Video"), |
|
.p.type = AVMEDIA_TYPE_VIDEO, |
|
.p.id = AV_CODEC_ID_MOBICLIP, |
|
.priv_data_size = sizeof(MobiClipContext), |
|
.init = mobiclip_init, |
|
FF_CODEC_DECODE_CB(mobiclip_decode), |
|
.flush = mobiclip_flush, |
|
.close = mobiclip_close, |
|
.p.capabilities = AV_CODEC_CAP_DR1, |
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
|
};
|
|
|