2012-10-08 10:03:08 +00:00
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/*
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* Copyright (c) 2003 Michael Niedermayer
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*
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2012-10-10 12:04:03 +00:00
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* This file is part of FFmpeg.
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2012-10-08 10:03:08 +00:00
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*
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2012-10-10 12:04:03 +00:00
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* FFmpeg is free software; you can redistribute it and/or
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2012-10-08 10:03:08 +00:00
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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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2012-10-10 12:04:03 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2012-10-08 10:03:08 +00:00
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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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2012-10-10 12:04:03 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2012-10-08 10:03:08 +00:00
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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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* ASUS V1/V2 decoder.
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*/
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2012-10-11 16:50:30 +00:00
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#include "libavutil/attributes.h"
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2012-10-08 10:03:08 +00:00
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#include "libavutil/mem.h"
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#include "asv.h"
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#include "avcodec.h"
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#include "put_bits.h"
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#include "dsputil.h"
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2012-11-10 12:22:56 +00:00
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#include "internal.h"
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2012-10-11 16:50:30 +00:00
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#include "mathops.h"
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2012-10-08 10:03:08 +00:00
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#include "mpeg12data.h"
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#define VLC_BITS 6
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#define ASV2_LEVEL_VLC_BITS 10
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static VLC ccp_vlc;
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static VLC level_vlc;
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static VLC dc_ccp_vlc;
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static VLC ac_ccp_vlc;
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static VLC asv2_level_vlc;
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2012-11-14 13:49:44 +00:00
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static av_cold void init_vlcs(ASV1Context *a)
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{
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2012-10-08 10:03:08 +00:00
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static int done = 0;
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if (!done) {
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done = 1;
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INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
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2012-11-14 13:49:44 +00:00
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&ff_asv_ccp_tab[0][1], 2, 1,
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&ff_asv_ccp_tab[0][0], 2, 1, 64);
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2012-10-08 10:03:08 +00:00
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INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
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2012-11-14 13:49:44 +00:00
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&ff_asv_dc_ccp_tab[0][1], 2, 1,
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&ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
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2012-10-08 10:03:08 +00:00
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INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
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2012-11-14 13:49:44 +00:00
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&ff_asv_ac_ccp_tab[0][1], 2, 1,
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&ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
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2012-10-08 10:03:08 +00:00
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INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
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2012-11-14 13:49:44 +00:00
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&ff_asv_level_tab[0][1], 2, 1,
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&ff_asv_level_tab[0][0], 2, 1, 64);
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2012-10-08 10:03:08 +00:00
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INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
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2012-11-14 13:49:44 +00:00
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&ff_asv2_level_tab[0][1], 2, 1,
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&ff_asv2_level_tab[0][0], 2, 1, 1024);
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2012-10-08 10:03:08 +00:00
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}
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}
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//FIXME write a reversed bitstream reader to avoid the double reverse
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2012-11-14 13:49:44 +00:00
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static inline int asv2_get_bits(GetBitContext *gb, int n)
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{
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return ff_reverse[get_bits(gb, n) << (8-n)];
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2012-10-08 10:03:08 +00:00
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}
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2012-11-14 13:49:44 +00:00
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static inline int asv1_get_level(GetBitContext *gb)
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{
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int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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if (code == 3)
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return get_sbits(gb, 8);
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else
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return code - 3;
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2012-10-08 10:03:08 +00:00
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}
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2012-11-14 13:49:44 +00:00
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static inline int asv2_get_level(GetBitContext *gb)
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{
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int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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if (code == 31)
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return (int8_t)asv2_get_bits(gb, 8);
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else
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return code - 31;
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2012-10-08 10:03:08 +00:00
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}
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2012-11-14 13:49:44 +00:00
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static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64])
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{
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2012-10-08 10:03:08 +00:00
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int i;
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2012-11-14 13:49:44 +00:00
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block[0] = 8 * get_bits(&a->gb, 8);
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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for (i = 0; i < 11; i++) {
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const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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if (ccp) {
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if (ccp == 16)
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break;
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if (ccp < 0 || i >= 10) {
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2012-10-08 10:03:08 +00:00
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av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
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2012-11-14 13:59:40 +00:00
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return AVERROR_INVALIDDATA;
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2012-10-08 10:03:08 +00:00
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}
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2012-11-14 13:49:44 +00:00
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if (ccp & 8)
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block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
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if (ccp & 4)
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block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
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if (ccp & 2)
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block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
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if (ccp & 1)
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block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
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2012-10-08 10:03:08 +00:00
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}
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}
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return 0;
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}
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2012-11-14 13:49:44 +00:00
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static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64])
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{
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2012-10-08 10:03:08 +00:00
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int i, count, ccp;
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2012-11-14 13:49:44 +00:00
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count = asv2_get_bits(&a->gb, 4);
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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block[0] = 8 * asv2_get_bits(&a->gb, 8);
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
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if (ccp) {
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if (ccp & 4)
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block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
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if (ccp & 2)
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block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
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if (ccp & 1)
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block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
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2012-10-08 10:03:08 +00:00
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}
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2012-11-14 13:49:44 +00:00
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for (i = 1; i < count + 1; i++) {
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const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
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if (ccp) {
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if (ccp & 8)
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block[a->scantable.permutated[4*i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 0]) >> 4;
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if (ccp & 4)
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block[a->scantable.permutated[4*i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 1]) >> 4;
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if (ccp & 2)
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block[a->scantable.permutated[4*i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 2]) >> 4;
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if (ccp & 1)
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block[a->scantable.permutated[4*i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 3]) >> 4;
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2012-10-08 10:03:08 +00:00
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}
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}
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return 0;
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}
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2012-11-14 13:49:44 +00:00
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static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64])
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{
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2012-10-08 10:03:08 +00:00
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int i;
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a->dsp.clear_blocks(block[0]);
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2012-11-14 13:49:44 +00:00
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if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
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for (i = 0; i < 6; i++) {
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if (asv1_decode_block(a, block[i]) < 0)
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2012-10-08 10:03:08 +00:00
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return -1;
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}
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2012-11-14 13:49:44 +00:00
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} else {
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for (i = 0; i < 6; i++) {
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if (asv2_decode_block(a, block[i]) < 0)
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2012-10-08 10:03:08 +00:00
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return -1;
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}
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}
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return 0;
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}
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2012-11-14 13:49:44 +00:00
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static inline void idct_put(ASV1Context *a, int mb_x, int mb_y)
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{
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DCTELEM (*block)[64] = a->block;
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int linesize = a->picture.linesize[0];
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2012-10-08 10:03:08 +00:00
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uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
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uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
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uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
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a->dsp.idct_put(dest_y , linesize, block[0]);
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a->dsp.idct_put(dest_y + 8, linesize, block[1]);
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a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
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a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
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2012-11-14 13:49:44 +00:00
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if (!(a->avctx->flags&CODEC_FLAG_GRAY)) {
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2012-10-08 10:03:08 +00:00
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a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
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a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
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}
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}
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static int decode_frame(AVCodecContext *avctx,
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2012-11-13 18:35:22 +00:00
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void *data, int *got_frame,
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2012-10-08 10:03:08 +00:00
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AVPacket *avpkt)
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{
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ASV1Context * const a = avctx->priv_data;
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2012-11-14 13:49:44 +00:00
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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AVFrame *picture = data;
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AVFrame * const p = &a->picture;
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2012-11-14 13:59:40 +00:00
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int mb_x, mb_y, ret;
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2012-10-08 10:03:08 +00:00
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2012-11-14 13:49:44 +00:00
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if (p->data[0])
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2012-10-08 10:03:08 +00:00
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avctx->release_buffer(avctx, p);
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2012-11-14 13:49:44 +00:00
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p->reference = 0;
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2012-11-14 13:59:40 +00:00
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if ((ret = ff_get_buffer(avctx, p)) < 0) {
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2012-10-08 10:03:08 +00:00
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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2012-11-14 13:59:40 +00:00
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return ret;
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2012-10-08 10:03:08 +00:00
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}
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2012-11-14 13:49:44 +00:00
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p->pict_type = AV_PICTURE_TYPE_I;
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p->key_frame = 1;
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2012-10-08 10:03:08 +00:00
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av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
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buf_size);
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if (!a->bitstream_buffer)
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return AVERROR(ENOMEM);
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2012-11-14 13:49:44 +00:00
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if (avctx->codec_id == AV_CODEC_ID_ASV1)
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2012-10-08 10:03:08 +00:00
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a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
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2012-11-14 13:49:44 +00:00
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else {
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2012-10-08 10:03:08 +00:00
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int i;
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2012-11-14 13:49:44 +00:00
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for (i = 0; i < buf_size; i++)
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a->bitstream_buffer[i] = ff_reverse[buf[i]];
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2012-10-08 10:03:08 +00:00
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}
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init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
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2012-11-14 13:49:44 +00:00
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for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
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for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
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2012-11-14 13:59:40 +00:00
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if ((ret = decode_mb(a, a->block)) < 0)
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return ret;
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2012-10-08 10:03:08 +00:00
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idct_put(a, mb_x, mb_y);
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}
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}
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2012-11-14 13:49:44 +00:00
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if (a->mb_width2 != a->mb_width) {
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mb_x = a->mb_width2;
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for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
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2012-11-14 13:59:40 +00:00
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if ((ret = decode_mb(a, a->block)) < 0)
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return ret;
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2012-10-08 10:03:08 +00:00
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idct_put(a, mb_x, mb_y);
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}
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}
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2012-11-14 13:49:44 +00:00
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if (a->mb_height2 != a->mb_height) {
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mb_y = a->mb_height2;
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for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
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2012-11-14 13:59:40 +00:00
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if ((ret = decode_mb(a, a->block)) < 0)
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return ret;
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2012-10-08 10:03:08 +00:00
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idct_put(a, mb_x, mb_y);
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}
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}
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*picture = a->picture;
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2012-11-13 18:35:22 +00:00
|
|
|
*got_frame = 1;
|
2012-10-08 10:03:08 +00:00
|
|
|
|
|
|
|
emms_c();
|
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
return (get_bits_count(&a->gb) + 31) / 32 * 4;
|
2012-10-08 10:03:08 +00:00
|
|
|
}
|
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
|
|
{
|
2012-10-08 10:03:08 +00:00
|
|
|
ASV1Context * const a = avctx->priv_data;
|
2012-11-14 13:49:44 +00:00
|
|
|
AVFrame *p = &a->picture;
|
|
|
|
const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
|
2012-10-08 10:03:08 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
ff_asv_common_init(avctx);
|
|
|
|
init_vlcs(a);
|
|
|
|
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_asv_scantab);
|
2012-11-14 13:49:44 +00:00
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
2012-10-08 10:03:08 +00:00
|
|
|
|
2012-12-23 14:03:15 +00:00
|
|
|
if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) {
|
2012-10-08 10:03:08 +00:00
|
|
|
av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
|
2012-11-14 13:49:44 +00:00
|
|
|
if (avctx->codec_id == AV_CODEC_ID_ASV1)
|
|
|
|
a->inv_qscale = 6;
|
2012-10-08 10:03:08 +00:00
|
|
|
else
|
2012-11-14 13:49:44 +00:00
|
|
|
a->inv_qscale = 10;
|
2012-10-08 10:03:08 +00:00
|
|
|
}
|
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
for (i = 0; i < 64; i++) {
|
2012-10-08 10:03:08 +00:00
|
|
|
int index = ff_asv_scantab[i];
|
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
|
2012-10-08 10:03:08 +00:00
|
|
|
}
|
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
p->qstride = a->mb_width;
|
|
|
|
p->qscale_table = av_malloc(p->qstride * a->mb_height);
|
|
|
|
p->quality = (32 * scale + a->inv_qscale / 2) / a->inv_qscale;
|
|
|
|
memset(p->qscale_table, p->quality, p->qstride * a->mb_height);
|
2012-10-08 10:03:08 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
|
|
|
{
|
2012-10-08 10:03:08 +00:00
|
|
|
ASV1Context * const a = avctx->priv_data;
|
|
|
|
|
|
|
|
av_freep(&a->bitstream_buffer);
|
|
|
|
av_freep(&a->picture.qscale_table);
|
2012-11-14 13:49:44 +00:00
|
|
|
a->bitstream_buffer_size = 0;
|
2012-10-08 10:03:08 +00:00
|
|
|
|
2012-11-14 13:49:44 +00:00
|
|
|
if (a->picture.data[0])
|
2012-10-08 10:03:08 +00:00
|
|
|
avctx->release_buffer(avctx, &a->picture);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-10-10 12:04:03 +00:00
|
|
|
#if CONFIG_ASV1_DECODER
|
2012-10-08 10:03:08 +00:00
|
|
|
AVCodec ff_asv1_decoder = {
|
|
|
|
.name = "asv1",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.id = AV_CODEC_ID_ASV1,
|
|
|
|
.priv_data_size = sizeof(ASV1Context),
|
|
|
|
.init = decode_init,
|
|
|
|
.close = decode_end,
|
|
|
|
.decode = decode_frame,
|
|
|
|
.capabilities = CODEC_CAP_DR1,
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
|
|
|
|
};
|
2012-10-10 12:04:03 +00:00
|
|
|
#endif
|
2012-10-08 10:03:08 +00:00
|
|
|
|
2012-10-10 12:04:03 +00:00
|
|
|
#if CONFIG_ASV2_DECODER
|
2012-10-08 10:03:08 +00:00
|
|
|
AVCodec ff_asv2_decoder = {
|
|
|
|
.name = "asv2",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.id = AV_CODEC_ID_ASV2,
|
|
|
|
.priv_data_size = sizeof(ASV1Context),
|
|
|
|
.init = decode_init,
|
|
|
|
.close = decode_end,
|
|
|
|
.decode = decode_frame,
|
|
|
|
.capabilities = CODEC_CAP_DR1,
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
|
|
|
|
};
|
2012-10-10 12:04:03 +00:00
|
|
|
#endif
|
2012-10-08 10:03:08 +00:00
|
|
|
|