ffmpeg / libavcodec / svq1dec.c @ 8ed2ae09
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/*
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* SVQ1 decoder
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* ported to MPlayer by Arpi <arpi@thot.banki.hu>
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* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
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*
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* Copyright (C) 2002 the xine project
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* Copyright (C) 2002 the ffmpeg project
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*
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* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file
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* Sorenson Vector Quantizer #1 (SVQ1) video codec.
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* For more information of the SVQ1 algorithm, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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//#define DEBUG_SVQ1
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "mpegvideo.h" |
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#include "mathops.h" |
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#include "svq1.h" |
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#undef NDEBUG
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#include <assert.h> |
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extern const uint8_t mvtab[33][2]; |
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static VLC svq1_block_type;
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static VLC svq1_motion_component;
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static VLC svq1_intra_multistage[6]; |
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static VLC svq1_inter_multistage[6]; |
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static VLC svq1_intra_mean;
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static VLC svq1_inter_mean;
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/* motion vector (prediction) */
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typedef struct svq1_pmv_s { |
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int x;
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int y;
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} svq1_pmv; |
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static const uint16_t checksum_table[256] = { |
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0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, |
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0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, |
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0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, |
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0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, |
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0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, |
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0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, |
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0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, |
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0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, |
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0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, |
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0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, |
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0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, |
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0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, |
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0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, |
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0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, |
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0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, |
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0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, |
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0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, |
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0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, |
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0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, |
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0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, |
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0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, |
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0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, |
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0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, |
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0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, |
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0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, |
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0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, |
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0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, |
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0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, |
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0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, |
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0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, |
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0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, |
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0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 |
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}; |
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static const uint8_t string_table[256] = { |
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0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54, |
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0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D, |
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0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06, |
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0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F, |
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0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0, |
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0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9, |
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0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2, |
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0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B, |
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0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9, |
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0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0, |
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0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B, |
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0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2, |
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0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D, |
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0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44, |
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0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F, |
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0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16, |
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0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB, |
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0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92, |
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0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9, |
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0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0, |
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0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F, |
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0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36, |
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0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D, |
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0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64, |
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0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26, |
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0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F, |
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0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74, |
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0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D, |
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0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82, |
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0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB, |
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0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0, |
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0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9 |
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}; |
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#define SVQ1_PROCESS_VECTOR()\
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for (; level > 0; i++) {\ |
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/* process next depth */\
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if (i == m) {\
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m = n;\ |
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if (--level == 0)\ |
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break;\
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}\ |
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/* divide block if next bit set */\
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if (get_bits1 (bitbuf) == 0)\ |
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break;\
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/* add child nodes */\
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list[n++] = list[i];\ |
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list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level / 2) + 1));\ |
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} |
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#define SVQ1_ADD_CODEBOOK()\
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/* add codebook entries to vector */\
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for (j=0; j < stages; j++) {\ |
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n3 = codebook[entries[j]] ^ 0x80808080;\
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n1 += ((n3 & 0xFF00FF00) >> 8);\ |
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n2 += (n3 & 0x00FF00FF);\
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}\ |
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\ |
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/* clip to [0..255] */\
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if (n1 & 0xFF00FF00) {\ |
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n3 = ((( n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\ |
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n1 += 0x7F007F00;\
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n1 |= (((~n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\ |
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n1 &= (n3 & 0x00FF00FF);\
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}\ |
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\ |
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if (n2 & 0xFF00FF00) {\ |
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n3 = ((( n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\ |
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n2 += 0x7F007F00;\
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n2 |= (((~n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\ |
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n2 &= (n3 & 0x00FF00FF);\
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} |
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#define SVQ1_DO_CODEBOOK_INTRA()\
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for (y=0; y < height; y++) {\ |
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for (x=0; x < (width / 4); x++, codebook++) {\ |
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n1 = n4;\ |
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n2 = n4;\ |
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SVQ1_ADD_CODEBOOK()\ |
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/* store result */\
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dst[x] = (n1 << 8) | n2;\
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}\ |
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dst += (pitch / 4);\
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} |
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#define SVQ1_DO_CODEBOOK_NONINTRA()\
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for (y=0; y < height; y++) {\ |
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for (x=0; x < (width / 4); x++, codebook++) {\ |
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n3 = dst[x];\ |
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/* add mean value to vector */\
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n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\ |
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n2 = (n3 & 0x00FF00FF) + n4;\
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SVQ1_ADD_CODEBOOK()\ |
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/* store result */\
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dst[x] = (n1 << 8) | n2;\
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}\ |
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dst += (pitch / 4);\
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} |
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#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\
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codebook = (const uint32_t *) cbook[level];\
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bit_cache = get_bits (bitbuf, 4*stages);\
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/* calculate codebook entries for this vector */\
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for (j=0; j < stages; j++) {\ |
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entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\ |
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}\ |
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mean -= (stages * 128);\
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n4 = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF); |
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static int svq1_decode_block_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) { |
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uint32_t bit_cache; |
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uint8_t *list[63];
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uint32_t *dst; |
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const uint32_t *codebook;
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int entries[6]; |
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int i, j, m, n;
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int mean, stages;
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unsigned x, y, width, height, level;
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uint32_t n1, n2, n3, n4; |
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/* initialize list for breadth first processing of vectors */
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list[0] = pixels;
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/* recursively process vector */
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for (i=0, m=1, n=1, level=5; i < n; i++) { |
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SVQ1_PROCESS_VECTOR(); |
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/* destination address and vector size */
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dst = (uint32_t *) list[i]; |
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width = 1 << ((4 + level) /2); |
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height = 1 << ((3 + level) /2); |
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/* get number of stages (-1 skips vector, 0 for mean only) */
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stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1; |
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if (stages == -1) { |
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for (y=0; y < height; y++) { |
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memset (&dst[y*(pitch / 4)], 0, width); |
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} |
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continue; /* skip vector */ |
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} |
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if ((stages > 0) && (level >= 4)) { |
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#ifdef DEBUG_SVQ1
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av_log(s->avctx, AV_LOG_INFO, "Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",stages,level);
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#endif
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return -1; /* invalid vector */ |
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} |
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mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3); |
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if (stages == 0) { |
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for (y=0; y < height; y++) { |
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memset (&dst[y*(pitch / 4)], mean, width);
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} |
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} else {
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SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks); |
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SVQ1_DO_CODEBOOK_INTRA() |
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} |
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} |
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return 0; |
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} |
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static int svq1_decode_block_non_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) { |
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uint32_t bit_cache; |
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uint8_t *list[63];
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uint32_t *dst; |
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const uint32_t *codebook;
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int entries[6]; |
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int i, j, m, n;
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int mean, stages;
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int x, y, width, height, level;
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uint32_t n1, n2, n3, n4; |
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/* initialize list for breadth first processing of vectors */
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list[0] = pixels;
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|
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/* recursively process vector */
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for (i=0, m=1, n=1, level=5; i < n; i++) { |
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SVQ1_PROCESS_VECTOR(); |
279 |
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/* destination address and vector size */
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dst = (uint32_t *) list[i]; |
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width = 1 << ((4 + level) /2); |
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height = 1 << ((3 + level) /2); |
284 |
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/* get number of stages (-1 skips vector, 0 for mean only) */
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stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1; |
287 |
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if (stages == -1) continue; /* skip vector */ |
289 |
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if ((stages > 0) && (level >= 4)) { |
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#ifdef DEBUG_SVQ1
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av_log(s->avctx, AV_LOG_INFO, "Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",stages,level);
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#endif
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return -1; /* invalid vector */ |
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} |
296 |
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mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256; |
298 |
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SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks); |
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SVQ1_DO_CODEBOOK_NONINTRA() |
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} |
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return 0; |
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} |
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|
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static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv *mv, svq1_pmv **pmv) { |
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int diff;
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int i;
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for (i=0; i < 2; i++) { |
310 |
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/* get motion code */
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diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2); |
313 |
if(diff<0) |
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return -1; |
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else if(diff){ |
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if(get_bits1(bitbuf)) diff= -diff;
|
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} |
318 |
|
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/* add median of motion vector predictors and clip result */
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if (i == 1) |
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mv->y = ((diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26; |
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else
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mv->x = ((diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26; |
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} |
325 |
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return 0; |
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} |
328 |
|
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static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y) { |
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uint8_t *src; |
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uint8_t *dst; |
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int i;
|
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|
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src = &previous[x + y*pitch]; |
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dst = current; |
336 |
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for (i=0; i < 16; i++) { |
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memcpy (dst, src, 16);
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src += pitch; |
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dst += pitch; |
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} |
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} |
343 |
|
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static int svq1_motion_inter_block (MpegEncContext *s, GetBitContext *bitbuf, |
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uint8_t *current, uint8_t *previous, int pitch,
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svq1_pmv *motion, int x, int y) { |
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uint8_t *src; |
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uint8_t *dst; |
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svq1_pmv mv; |
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svq1_pmv *pmv[3];
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int result;
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|
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/* predict and decode motion vector */
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pmv[0] = &motion[0]; |
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if (y == 0) { |
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pmv[1] =
|
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pmv[2] = pmv[0]; |
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} |
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else {
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pmv[1] = &motion[(x / 8) + 2]; |
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pmv[2] = &motion[(x / 8) + 4]; |
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} |
363 |
|
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result = svq1_decode_motion_vector (bitbuf, &mv, pmv); |
365 |
|
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if (result != 0) |
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return result;
|
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|
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motion[0].x =
|
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motion[(x / 8) + 2].x = |
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motion[(x / 8) + 3].x = mv.x; |
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motion[0].y =
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motion[(x / 8) + 2].y = |
374 |
motion[(x / 8) + 3].y = mv.y; |
375 |
|
376 |
if(y + (mv.y >> 1)<0) |
377 |
mv.y= 0;
|
378 |
if(x + (mv.x >> 1)<0) |
379 |
mv.x= 0;
|
380 |
|
381 |
#if 0
|
382 |
int w= (s->width+15)&~15;
|
383 |
int h= (s->height+15)&~15;
|
384 |
if(x + (mv.x >> 1)<0 || y + (mv.y >> 1)<0 || x + (mv.x >> 1) + 16 > w || y + (mv.y >> 1) + 16> h)
|
385 |
av_log(s->avctx, AV_LOG_INFO, "%d %d %d %d\n", x, y, x + (mv.x >> 1), y + (mv.y >> 1));
|
386 |
#endif
|
387 |
|
388 |
src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1))*pitch]; |
389 |
dst = current; |
390 |
|
391 |
s->dsp.put_pixels_tab[0][((mv.y & 1) << 1) | (mv.x & 1)](dst,src,pitch,16); |
392 |
|
393 |
return 0; |
394 |
} |
395 |
|
396 |
static int svq1_motion_inter_4v_block (MpegEncContext *s, GetBitContext *bitbuf, |
397 |
uint8_t *current, uint8_t *previous, int pitch,
|
398 |
svq1_pmv *motion,int x, int y) { |
399 |
uint8_t *src; |
400 |
uint8_t *dst; |
401 |
svq1_pmv mv; |
402 |
svq1_pmv *pmv[4];
|
403 |
int i, result;
|
404 |
|
405 |
/* predict and decode motion vector (0) */
|
406 |
pmv[0] = &motion[0]; |
407 |
if (y == 0) { |
408 |
pmv[1] =
|
409 |
pmv[2] = pmv[0]; |
410 |
} |
411 |
else {
|
412 |
pmv[1] = &motion[(x / 8) + 2]; |
413 |
pmv[2] = &motion[(x / 8) + 4]; |
414 |
} |
415 |
|
416 |
result = svq1_decode_motion_vector (bitbuf, &mv, pmv); |
417 |
|
418 |
if (result != 0) |
419 |
return result;
|
420 |
|
421 |
/* predict and decode motion vector (1) */
|
422 |
pmv[0] = &mv;
|
423 |
if (y == 0) { |
424 |
pmv[1] =
|
425 |
pmv[2] = pmv[0]; |
426 |
} |
427 |
else {
|
428 |
pmv[1] = &motion[(x / 8) + 3]; |
429 |
} |
430 |
result = svq1_decode_motion_vector (bitbuf, &motion[0], pmv);
|
431 |
|
432 |
if (result != 0) |
433 |
return result;
|
434 |
|
435 |
/* predict and decode motion vector (2) */
|
436 |
pmv[1] = &motion[0]; |
437 |
pmv[2] = &motion[(x / 8) + 1]; |
438 |
|
439 |
result = svq1_decode_motion_vector (bitbuf, &motion[(x / 8) + 2], pmv); |
440 |
|
441 |
if (result != 0) |
442 |
return result;
|
443 |
|
444 |
/* predict and decode motion vector (3) */
|
445 |
pmv[2] = &motion[(x / 8) + 2]; |
446 |
pmv[3] = &motion[(x / 8) + 3]; |
447 |
|
448 |
result = svq1_decode_motion_vector (bitbuf, pmv[3], pmv);
|
449 |
|
450 |
if (result != 0) |
451 |
return result;
|
452 |
|
453 |
/* form predictions */
|
454 |
for (i=0; i < 4; i++) { |
455 |
int mvx= pmv[i]->x + (i&1)*16; |
456 |
int mvy= pmv[i]->y + (i>>1)*16; |
457 |
|
458 |
///XXX /FIXME clipping or padding?
|
459 |
if(y + (mvy >> 1)<0) |
460 |
mvy= 0;
|
461 |
if(x + (mvx >> 1)<0) |
462 |
mvx= 0;
|
463 |
|
464 |
#if 0
|
465 |
int w= (s->width+15)&~15;
|
466 |
int h= (s->height+15)&~15;
|
467 |
if(x + (mvx >> 1)<0 || y + (mvy >> 1)<0 || x + (mvx >> 1) + 8 > w || y + (mvy >> 1) + 8> h)
|
468 |
av_log(s->avctx, AV_LOG_INFO, "%d %d %d %d\n", x, y, x + (mvx >> 1), y + (mvy >> 1));
|
469 |
#endif
|
470 |
src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1))*pitch]; |
471 |
dst = current; |
472 |
|
473 |
s->dsp.put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst,src,pitch,8); |
474 |
|
475 |
/* select next block */
|
476 |
if (i & 1) { |
477 |
current += 8*(pitch - 1); |
478 |
} else {
|
479 |
current += 8;
|
480 |
} |
481 |
} |
482 |
|
483 |
return 0; |
484 |
} |
485 |
|
486 |
static int svq1_decode_delta_block (MpegEncContext *s, GetBitContext *bitbuf, |
487 |
uint8_t *current, uint8_t *previous, int pitch,
|
488 |
svq1_pmv *motion, int x, int y) { |
489 |
uint32_t block_type; |
490 |
int result = 0; |
491 |
|
492 |
/* get block type */
|
493 |
block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2); |
494 |
|
495 |
/* reset motion vectors */
|
496 |
if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
|
497 |
motion[0].x =
|
498 |
motion[0].y =
|
499 |
motion[(x / 8) + 2].x = |
500 |
motion[(x / 8) + 2].y = |
501 |
motion[(x / 8) + 3].x = |
502 |
motion[(x / 8) + 3].y = 0; |
503 |
} |
504 |
|
505 |
switch (block_type) {
|
506 |
case SVQ1_BLOCK_SKIP:
|
507 |
svq1_skip_block (current, previous, pitch, x, y); |
508 |
break;
|
509 |
|
510 |
case SVQ1_BLOCK_INTER:
|
511 |
result = svq1_motion_inter_block (s, bitbuf, current, previous, pitch, motion, x, y); |
512 |
|
513 |
if (result != 0) |
514 |
{ |
515 |
#ifdef DEBUG_SVQ1
|
516 |
av_log(s->avctx, AV_LOG_INFO, "Error in svq1_motion_inter_block %i\n",result);
|
517 |
#endif
|
518 |
break;
|
519 |
} |
520 |
result = svq1_decode_block_non_intra (bitbuf, current, pitch); |
521 |
break;
|
522 |
|
523 |
case SVQ1_BLOCK_INTER_4V:
|
524 |
result = svq1_motion_inter_4v_block (s, bitbuf, current, previous, pitch, motion, x, y); |
525 |
|
526 |
if (result != 0) |
527 |
{ |
528 |
#ifdef DEBUG_SVQ1
|
529 |
av_log(s->avctx, AV_LOG_INFO, "Error in svq1_motion_inter_4v_block %i\n",result);
|
530 |
#endif
|
531 |
break;
|
532 |
} |
533 |
result = svq1_decode_block_non_intra (bitbuf, current, pitch); |
534 |
break;
|
535 |
|
536 |
case SVQ1_BLOCK_INTRA:
|
537 |
result = svq1_decode_block_intra (bitbuf, current, pitch); |
538 |
break;
|
539 |
} |
540 |
|
541 |
return result;
|
542 |
} |
543 |
|
544 |
uint16_t ff_svq1_packet_checksum (const uint8_t *data, const int length, int value) { |
545 |
int i;
|
546 |
|
547 |
for (i=0; i < length; i++) { |
548 |
value = checksum_table[data[i] ^ (value >> 8)] ^ ((value & 0xFF) << 8); |
549 |
} |
550 |
|
551 |
return value;
|
552 |
} |
553 |
|
554 |
static void svq1_parse_string (GetBitContext *bitbuf, uint8_t *out) { |
555 |
uint8_t seed; |
556 |
int i;
|
557 |
|
558 |
out[0] = get_bits (bitbuf, 8); |
559 |
|
560 |
seed = string_table[out[0]];
|
561 |
|
562 |
for (i=1; i <= out[0]; i++) { |
563 |
out[i] = get_bits (bitbuf, 8) ^ seed;
|
564 |
seed = string_table[out[i] ^ seed]; |
565 |
} |
566 |
} |
567 |
|
568 |
static int svq1_decode_frame_header (GetBitContext *bitbuf,MpegEncContext *s) { |
569 |
int frame_size_code;
|
570 |
int temporal_reference;
|
571 |
|
572 |
temporal_reference = get_bits (bitbuf, 8);
|
573 |
|
574 |
/* frame type */
|
575 |
s->pict_type= get_bits (bitbuf, 2)+1; |
576 |
if(s->pict_type==4) |
577 |
return -1; |
578 |
|
579 |
if (s->pict_type == FF_I_TYPE) {
|
580 |
|
581 |
/* unknown fields */
|
582 |
if (s->f_code == 0x50 || s->f_code == 0x60) { |
583 |
int csum = get_bits (bitbuf, 16); |
584 |
|
585 |
csum = ff_svq1_packet_checksum (bitbuf->buffer, bitbuf->size_in_bits>>3, csum);
|
586 |
|
587 |
// av_log(s->avctx, AV_LOG_INFO, "%s checksum (%02x) for packet data\n",
|
588 |
// (csum == 0) ? "correct" : "incorrect", csum);
|
589 |
} |
590 |
|
591 |
if ((s->f_code ^ 0x10) >= 0x50) { |
592 |
uint8_t msg[256];
|
593 |
|
594 |
svq1_parse_string (bitbuf, msg); |
595 |
|
596 |
av_log(s->avctx, AV_LOG_INFO, "embedded message: \"%s\"\n", (char *) msg); |
597 |
} |
598 |
|
599 |
skip_bits (bitbuf, 2);
|
600 |
skip_bits (bitbuf, 2);
|
601 |
skip_bits1 (bitbuf); |
602 |
|
603 |
/* load frame size */
|
604 |
frame_size_code = get_bits (bitbuf, 3);
|
605 |
|
606 |
if (frame_size_code == 7) { |
607 |
/* load width, height (12 bits each) */
|
608 |
s->width = get_bits (bitbuf, 12);
|
609 |
s->height = get_bits (bitbuf, 12);
|
610 |
|
611 |
if (!s->width || !s->height)
|
612 |
return -1; |
613 |
} else {
|
614 |
/* get width, height from table */
|
615 |
s->width = ff_svq1_frame_size_table[frame_size_code].width; |
616 |
s->height = ff_svq1_frame_size_table[frame_size_code].height; |
617 |
} |
618 |
} |
619 |
|
620 |
/* unknown fields */
|
621 |
if (get_bits1 (bitbuf) == 1) { |
622 |
skip_bits1 (bitbuf); /* use packet checksum if (1) */
|
623 |
skip_bits1 (bitbuf); /* component checksums after image data if (1) */
|
624 |
|
625 |
if (get_bits (bitbuf, 2) != 0) |
626 |
return -1; |
627 |
} |
628 |
|
629 |
if (get_bits1 (bitbuf) == 1) { |
630 |
skip_bits1 (bitbuf); |
631 |
skip_bits (bitbuf, 4);
|
632 |
skip_bits1 (bitbuf); |
633 |
skip_bits (bitbuf, 2);
|
634 |
|
635 |
while (get_bits1 (bitbuf) == 1) { |
636 |
skip_bits (bitbuf, 8);
|
637 |
} |
638 |
} |
639 |
|
640 |
return 0; |
641 |
} |
642 |
|
643 |
static int svq1_decode_frame(AVCodecContext *avctx, |
644 |
void *data, int *data_size, |
645 |
AVPacket *avpkt) |
646 |
{ |
647 |
const uint8_t *buf = avpkt->data;
|
648 |
int buf_size = avpkt->size;
|
649 |
MpegEncContext *s=avctx->priv_data; |
650 |
uint8_t *current, *previous; |
651 |
int result, i, x, y, width, height;
|
652 |
AVFrame *pict = data; |
653 |
svq1_pmv *pmv; |
654 |
|
655 |
/* initialize bit buffer */
|
656 |
init_get_bits(&s->gb,buf,buf_size*8);
|
657 |
|
658 |
/* decode frame header */
|
659 |
s->f_code = get_bits (&s->gb, 22);
|
660 |
|
661 |
if ((s->f_code & ~0x70) || !(s->f_code & 0x60)) |
662 |
return -1; |
663 |
|
664 |
/* swap some header bytes (why?) */
|
665 |
if (s->f_code != 0x20) { |
666 |
uint32_t *src = (uint32_t *) (buf + 4);
|
667 |
|
668 |
for (i=0; i < 4; i++) { |
669 |
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i]; |
670 |
} |
671 |
} |
672 |
|
673 |
result = svq1_decode_frame_header (&s->gb, s); |
674 |
|
675 |
if (result != 0) |
676 |
{ |
677 |
#ifdef DEBUG_SVQ1
|
678 |
av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_frame_header %i\n",result);
|
679 |
#endif
|
680 |
return result;
|
681 |
} |
682 |
|
683 |
//FIXME this avoids some confusion for "B frames" without 2 references
|
684 |
//this should be removed after libavcodec can handle more flexible picture types & ordering
|
685 |
if(s->pict_type==FF_B_TYPE && s->last_picture_ptr==NULL) return buf_size; |
686 |
|
687 |
#if FF_API_HURRY_UP
|
688 |
if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return buf_size; |
689 |
#endif
|
690 |
if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)
|
691 |
||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE) |
692 |
|| avctx->skip_frame >= AVDISCARD_ALL) |
693 |
return buf_size;
|
694 |
|
695 |
if(MPV_frame_start(s, avctx) < 0) |
696 |
return -1; |
697 |
|
698 |
pmv = av_malloc((FFALIGN(s->width, 16)/8 + 3) * sizeof(*pmv)); |
699 |
if (!pmv)
|
700 |
return -1; |
701 |
|
702 |
/* decode y, u and v components */
|
703 |
for (i=0; i < 3; i++) { |
704 |
int linesize;
|
705 |
if (i == 0) { |
706 |
width = FFALIGN(s->width, 16);
|
707 |
height = FFALIGN(s->height, 16);
|
708 |
linesize= s->linesize; |
709 |
} else {
|
710 |
if(s->flags&CODEC_FLAG_GRAY) break; |
711 |
width = FFALIGN(s->width/4, 16); |
712 |
height = FFALIGN(s->height/4, 16); |
713 |
linesize= s->uvlinesize; |
714 |
} |
715 |
|
716 |
current = s->current_picture.data[i]; |
717 |
|
718 |
if(s->pict_type==FF_B_TYPE){
|
719 |
previous = s->next_picture.data[i]; |
720 |
}else{
|
721 |
previous = s->last_picture.data[i]; |
722 |
} |
723 |
|
724 |
if (s->pict_type == FF_I_TYPE) {
|
725 |
/* keyframe */
|
726 |
for (y=0; y < height; y+=16) { |
727 |
for (x=0; x < width; x+=16) { |
728 |
result = svq1_decode_block_intra (&s->gb, ¤t[x], linesize); |
729 |
if (result != 0) |
730 |
{ |
731 |
//#ifdef DEBUG_SVQ1
|
732 |
av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_block %i (keyframe)\n",result);
|
733 |
//#endif
|
734 |
goto err;
|
735 |
} |
736 |
} |
737 |
current += 16*linesize;
|
738 |
} |
739 |
} else {
|
740 |
/* delta frame */
|
741 |
memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv)); |
742 |
|
743 |
for (y=0; y < height; y+=16) { |
744 |
for (x=0; x < width; x+=16) { |
745 |
result = svq1_decode_delta_block (s, &s->gb, ¤t[x], previous, |
746 |
linesize, pmv, x, y); |
747 |
if (result != 0) |
748 |
{ |
749 |
#ifdef DEBUG_SVQ1
|
750 |
av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_delta_block %i\n",result);
|
751 |
#endif
|
752 |
goto err;
|
753 |
} |
754 |
} |
755 |
|
756 |
pmv[0].x =
|
757 |
pmv[0].y = 0; |
758 |
|
759 |
current += 16*linesize;
|
760 |
} |
761 |
} |
762 |
} |
763 |
|
764 |
*pict = *(AVFrame*)&s->current_picture; |
765 |
|
766 |
|
767 |
MPV_frame_end(s); |
768 |
|
769 |
*data_size=sizeof(AVFrame);
|
770 |
result = buf_size; |
771 |
err:
|
772 |
av_free(pmv); |
773 |
return result;
|
774 |
} |
775 |
|
776 |
static av_cold int svq1_decode_init(AVCodecContext *avctx) |
777 |
{ |
778 |
MpegEncContext *s = avctx->priv_data; |
779 |
int i;
|
780 |
int offset = 0; |
781 |
|
782 |
MPV_decode_defaults(s); |
783 |
|
784 |
s->avctx = avctx; |
785 |
s->width = (avctx->width+3)&~3; |
786 |
s->height = (avctx->height+3)&~3; |
787 |
s->codec_id= avctx->codec->id; |
788 |
avctx->pix_fmt = PIX_FMT_YUV410P; |
789 |
avctx->has_b_frames= 1; // not true, but DP frames and these behave like unidirectional b frames |
790 |
s->flags= avctx->flags; |
791 |
if (MPV_common_init(s) < 0) return -1; |
792 |
|
793 |
INIT_VLC_STATIC(&svq1_block_type, 2, 4, |
794 |
&ff_svq1_block_type_vlc[0][1], 2, 1, |
795 |
&ff_svq1_block_type_vlc[0][0], 2, 1, 6); |
796 |
|
797 |
INIT_VLC_STATIC(&svq1_motion_component, 7, 33, |
798 |
&mvtab[0][1], 2, 1, |
799 |
&mvtab[0][0], 2, 1, 176); |
800 |
|
801 |
for (i = 0; i < 6; i++) { |
802 |
static const uint8_t sizes[2][6] = {{14, 10, 14, 18, 16, 18}, {10, 10, 14, 14, 14, 16}}; |
803 |
static VLC_TYPE table[168][2]; |
804 |
svq1_intra_multistage[i].table = &table[offset]; |
805 |
svq1_intra_multistage[i].table_allocated = sizes[0][i];
|
806 |
offset += sizes[0][i];
|
807 |
init_vlc(&svq1_intra_multistage[i], 3, 8, |
808 |
&ff_svq1_intra_multistage_vlc[i][0][1], 2, 1, |
809 |
&ff_svq1_intra_multistage_vlc[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC); |
810 |
svq1_inter_multistage[i].table = &table[offset]; |
811 |
svq1_inter_multistage[i].table_allocated = sizes[1][i];
|
812 |
offset += sizes[1][i];
|
813 |
init_vlc(&svq1_inter_multistage[i], 3, 8, |
814 |
&ff_svq1_inter_multistage_vlc[i][0][1], 2, 1, |
815 |
&ff_svq1_inter_multistage_vlc[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC); |
816 |
} |
817 |
|
818 |
INIT_VLC_STATIC(&svq1_intra_mean, 8, 256, |
819 |
&ff_svq1_intra_mean_vlc[0][1], 4, 2, |
820 |
&ff_svq1_intra_mean_vlc[0][0], 4, 2, 632); |
821 |
|
822 |
INIT_VLC_STATIC(&svq1_inter_mean, 9, 512, |
823 |
&ff_svq1_inter_mean_vlc[0][1], 4, 2, |
824 |
&ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434); |
825 |
|
826 |
return 0; |
827 |
} |
828 |
|
829 |
static av_cold int svq1_decode_end(AVCodecContext *avctx) |
830 |
{ |
831 |
MpegEncContext *s = avctx->priv_data; |
832 |
|
833 |
MPV_common_end(s); |
834 |
return 0; |
835 |
} |
836 |
|
837 |
|
838 |
AVCodec ff_svq1_decoder = { |
839 |
"svq1",
|
840 |
AVMEDIA_TYPE_VIDEO, |
841 |
CODEC_ID_SVQ1, |
842 |
sizeof(MpegEncContext),
|
843 |
svq1_decode_init, |
844 |
NULL,
|
845 |
svq1_decode_end, |
846 |
svq1_decode_frame, |
847 |
CODEC_CAP_DR1, |
848 |
.flush= ff_mpeg_flush, |
849 |
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV410P, PIX_FMT_NONE}, |
850 |
.long_name= NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
|
851 |
}; |