mirror of https://git.ffmpeg.org/ffmpeg.git
1355 lines
41 KiB
C
1355 lines
41 KiB
C
/*
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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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#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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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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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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uint8_t *bitstream;
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int bitstream_size;
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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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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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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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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],
|
|
mv_bits[i][j], sizeof(*mv_bits[i][j]),
|
|
mv_syms[i][j], sizeof(*mv_syms[i][j]), sizeof(*mv_syms[i][j]),
|
|
0, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static av_cold int mobiclip_init(AVCodecContext *avctx)
|
|
{
|
|
static AVOnce init_static_once = AV_ONCE_INIT;
|
|
MobiClipContext *s = avctx->priv_data;
|
|
|
|
if (avctx->width & 15 || avctx->height & 15) {
|
|
av_log(avctx, AV_LOG_ERROR, "width/height not multiple of 16\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ff_bswapdsp_init(&s->bdsp);
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
|
|
s->motion = av_calloc(avctx->width / 16 + 3, sizeof(MotionXY));
|
|
if (!s->motion)
|
|
return AVERROR(ENOMEM);
|
|
s->motion_size = (avctx->width / 16 + 3) * sizeof(MotionXY);
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
s->pic[i] = av_frame_alloc();
|
|
if (!s->pic[i])
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
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,
|
|
};
|