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/* |
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* Copyright (c) 2003 Michael Niedermayer |
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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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/** |
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* @file |
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* ASUS V1/V2 decoder. |
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*/ |
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#include "libavutil/attributes.h" |
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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 "blockdsp.h" |
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#include "idctdsp.h" |
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#include "internal.h" |
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#include "mathops.h" |
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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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static av_cold void init_vlcs(ASV1Context *a) |
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{ |
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static int done = 0; |
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✓✓ |
18 |
if (!done) { |
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10 |
done = 1; |
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|
10 |
INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17, |
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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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INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8, |
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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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INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16, |
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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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INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7, |
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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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INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, |
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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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} |
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} |
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// FIXME write a reversed bitstream reader to avoid the double reverse |
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718813 |
static inline int asv2_get_bits(GetBitContext *gb, int n) |
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{ |
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718813 |
return ff_reverse[get_bits(gb, n) << (8 - n)]; |
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} |
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2972884 |
static inline int asv1_get_level(GetBitContext *gb) |
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{ |
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2972884 |
int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1); |
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✓✓ |
2972884 |
if (code == 3) |
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429712 |
return get_sbits(gb, 8); |
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else |
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2543172 |
return code - 3; |
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} |
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3660409 |
static inline int asv2_get_level(GetBitContext *gb) |
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{ |
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3660409 |
int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1); |
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✓✓ |
3660409 |
if (code == 31) |
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return (int8_t) asv2_get_bits(gb, 8); |
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else |
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3659796 |
return code - 31; |
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} |
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359100 |
static inline int asv1_decode_block(ASV1Context *a, int16_t block[64]) |
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{ |
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int i; |
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359100 |
block[0] = 8 * get_bits(&a->gb, 8); |
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✓✗ |
2128752 |
for (i = 0; i < 11; i++) { |
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2128752 |
const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1); |
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✓✓ |
2128752 |
if (ccp) { |
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✓✓ |
1723494 |
if (ccp == 16) |
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359100 |
break; |
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✓✗✗✓
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1364394 |
if (ccp < 0 || i >= 10) { |
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av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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✓✓ |
1364394 |
if (ccp & 8) |
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759471 |
block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4; |
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✓✓ |
1364394 |
if (ccp & 4) |
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828513 |
block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4; |
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✓✓ |
1364394 |
if (ccp & 2) |
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781213 |
block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4; |
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✓✓ |
1364394 |
if (ccp & 1) |
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603687 |
block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4; |
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} |
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} |
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359100 |
return 0; |
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} |
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359100 |
static inline int asv2_decode_block(ASV1Context *a, int16_t block[64]) |
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{ |
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int i, count, ccp; |
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359100 |
count = asv2_get_bits(&a->gb, 4); |
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359100 |
block[0] = 8 * asv2_get_bits(&a->gb, 8); |
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359100 |
ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1); |
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✓✓ |
359100 |
if (ccp) { |
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✓✓ |
329075 |
if (ccp & 4) |
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281504 |
block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4; |
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✓✓ |
329075 |
if (ccp & 2) |
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284503 |
block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4; |
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✓✓ |
329075 |
if (ccp & 1) |
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226812 |
block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4; |
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} |
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✓✓ |
2350028 |
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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✓✓ |
1990928 |
if (ccp) { |
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✓✓ |
1368743 |
if (ccp & 8) |
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968959 |
block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4; |
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✓✓ |
1368743 |
if (ccp & 4) |
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733048 |
block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4; |
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✓✓ |
1368743 |
if (ccp & 2) |
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667011 |
block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4; |
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✓✓ |
1368743 |
if (ccp & 1) |
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498572 |
block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4; |
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} |
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} |
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359100 |
return 0; |
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} |
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119700 |
static inline int decode_mb(ASV1Context *a, int16_t block[6][64]) |
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{ |
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int i, ret; |
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119700 |
a->bdsp.clear_blocks(block[0]); |
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✓✓ |
119700 |
if (a->avctx->codec_id == AV_CODEC_ID_ASV1) { |
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✓✓ |
418950 |
for (i = 0; i < 6; i++) { |
172 |
✗✓ |
359100 |
if ((ret = asv1_decode_block(a, block[i])) < 0) |
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return ret; |
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} |
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} else { |
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✓✓ |
418950 |
for (i = 0; i < 6; i++) { |
177 |
✗✓ |
359100 |
if ((ret = asv2_decode_block(a, block[i])) < 0) |
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return ret; |
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} |
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} |
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119700 |
return 0; |
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} |
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119700 |
static inline void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y) |
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{ |
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119700 |
int16_t(*block)[64] = a->block; |
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119700 |
int linesize = frame->linesize[0]; |
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119700 |
uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16; |
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119700 |
uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8; |
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119700 |
uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8; |
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119700 |
a->idsp.idct_put(dest_y, linesize, block[0]); |
194 |
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119700 |
a->idsp.idct_put(dest_y + 8, linesize, block[1]); |
195 |
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119700 |
a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]); |
196 |
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119700 |
a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]); |
197 |
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|
198 |
✓✗ |
119700 |
if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) { |
199 |
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119700 |
a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]); |
200 |
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119700 |
a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]); |
201 |
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} |
202 |
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119700 |
} |
203 |
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204 |
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400 |
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
205 |
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AVPacket *avpkt) |
206 |
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{ |
207 |
|
400 |
ASV1Context *const a = avctx->priv_data; |
208 |
|
400 |
const uint8_t *buf = avpkt->data; |
209 |
|
400 |
int buf_size = avpkt->size; |
210 |
|
400 |
AVFrame *const p = data; |
211 |
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int mb_x, mb_y, ret; |
212 |
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|
213 |
✗✓ |
400 |
if (buf_size * 8LL < a->mb_height * a->mb_width * 13LL) |
214 |
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return AVERROR_INVALIDDATA; |
215 |
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|
216 |
✗✓ |
400 |
if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
217 |
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return ret; |
218 |
|
400 |
p->pict_type = AV_PICTURE_TYPE_I; |
219 |
|
400 |
p->key_frame = 1; |
220 |
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221 |
|
400 |
av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, |
222 |
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buf_size); |
223 |
✗✓ |
400 |
if (!a->bitstream_buffer) |
224 |
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return AVERROR(ENOMEM); |
225 |
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|
226 |
✓✓ |
400 |
if (avctx->codec_id == AV_CODEC_ID_ASV1) { |
227 |
|
200 |
a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer, |
228 |
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(const uint32_t *) buf, buf_size / 4); |
229 |
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} else { |
230 |
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int i; |
231 |
✓✓ |
2941200 |
for (i = 0; i < buf_size; i++) |
232 |
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2941000 |
a->bitstream_buffer[i] = ff_reverse[buf[i]]; |
233 |
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} |
234 |
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235 |
|
400 |
init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8); |
236 |
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|
237 |
✓✓ |
6000 |
for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { |
238 |
✓✓ |
124800 |
for (mb_x = 0; mb_x < a->mb_width2; mb_x++) { |
239 |
✗✓ |
119200 |
if ((ret = decode_mb(a, a->block)) < 0) |
240 |
|
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return ret; |
241 |
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|
242 |
|
119200 |
idct_put(a, p, mb_x, mb_y); |
243 |
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} |
244 |
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} |
245 |
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|
246 |
✓✓ |
400 |
if (a->mb_width2 != a->mb_width) { |
247 |
|
100 |
mb_x = a->mb_width2; |
248 |
✓✓ |
300 |
for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { |
249 |
✗✓ |
200 |
if ((ret = decode_mb(a, a->block)) < 0) |
250 |
|
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return ret; |
251 |
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252 |
|
200 |
idct_put(a, p, mb_x, mb_y); |
253 |
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} |
254 |
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} |
255 |
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|
256 |
✓✓ |
400 |
if (a->mb_height2 != a->mb_height) { |
257 |
|
100 |
mb_y = a->mb_height2; |
258 |
✓✓ |
400 |
for (mb_x = 0; mb_x < a->mb_width; mb_x++) { |
259 |
✗✓ |
300 |
if ((ret = decode_mb(a, a->block)) < 0) |
260 |
|
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return ret; |
261 |
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|
262 |
|
300 |
idct_put(a, p, mb_x, mb_y); |
263 |
|
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} |
264 |
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} |
265 |
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|
266 |
|
400 |
*got_frame = 1; |
267 |
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|
268 |
|
400 |
emms_c(); |
269 |
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|
270 |
|
400 |
return (get_bits_count(&a->gb) + 31) / 32 * 4; |
271 |
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} |
272 |
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273 |
|
18 |
static av_cold int decode_init(AVCodecContext *avctx) |
274 |
|
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{ |
275 |
|
18 |
ASV1Context *const a = avctx->priv_data; |
276 |
✓✓ |
18 |
const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; |
277 |
|
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int i; |
278 |
|
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|
279 |
✗✓ |
18 |
if (avctx->extradata_size < 1) { |
280 |
|
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av_log(avctx, AV_LOG_WARNING, "No extradata provided\n"); |
281 |
|
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} |
282 |
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|
283 |
|
18 |
ff_asv_common_init(avctx); |
284 |
|
18 |
ff_blockdsp_init(&a->bdsp, avctx); |
285 |
|
18 |
ff_idctdsp_init(&a->idsp, avctx); |
286 |
|
18 |
init_vlcs(a); |
287 |
|
18 |
ff_init_scantable(a->idsp.idct_permutation, &a->scantable, ff_asv_scantab); |
288 |
|
18 |
avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
289 |
|
|
|
290 |
✓✗✗✓
|
18 |
if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) { |
291 |
|
|
av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n"); |
292 |
|
|
if (avctx->codec_id == AV_CODEC_ID_ASV1) |
293 |
|
|
a->inv_qscale = 6; |
294 |
|
|
else |
295 |
|
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a->inv_qscale = 10; |
296 |
|
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} |
297 |
|
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|
298 |
✓✓ |
1170 |
for (i = 0; i < 64; i++) { |
299 |
|
1152 |
int index = ff_asv_scantab[i]; |
300 |
|
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|
301 |
|
1152 |
a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] / |
302 |
|
1152 |
a->inv_qscale; |
303 |
|
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} |
304 |
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|
305 |
|
18 |
return 0; |
306 |
|
|
} |
307 |
|
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|
308 |
|
18 |
static av_cold int decode_end(AVCodecContext *avctx) |
309 |
|
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{ |
310 |
|
18 |
ASV1Context *const a = avctx->priv_data; |
311 |
|
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|
312 |
|
18 |
av_freep(&a->bitstream_buffer); |
313 |
|
18 |
a->bitstream_buffer_size = 0; |
314 |
|
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|
315 |
|
18 |
return 0; |
316 |
|
|
} |
317 |
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|
318 |
|
|
#if CONFIG_ASV1_DECODER |
319 |
|
|
AVCodec ff_asv1_decoder = { |
320 |
|
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.name = "asv1", |
321 |
|
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.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), |
322 |
|
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.type = AVMEDIA_TYPE_VIDEO, |
323 |
|
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.id = AV_CODEC_ID_ASV1, |
324 |
|
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.priv_data_size = sizeof(ASV1Context), |
325 |
|
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.init = decode_init, |
326 |
|
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.close = decode_end, |
327 |
|
|
.decode = decode_frame, |
328 |
|
|
.capabilities = AV_CODEC_CAP_DR1, |
329 |
|
|
}; |
330 |
|
|
#endif |
331 |
|
|
|
332 |
|
|
#if CONFIG_ASV2_DECODER |
333 |
|
|
AVCodec ff_asv2_decoder = { |
334 |
|
|
.name = "asv2", |
335 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), |
336 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
337 |
|
|
.id = AV_CODEC_ID_ASV2, |
338 |
|
|
.priv_data_size = sizeof(ASV1Context), |
339 |
|
|
.init = decode_init, |
340 |
|
|
.close = decode_end, |
341 |
|
|
.decode = decode_frame, |
342 |
|
|
.capabilities = AV_CODEC_CAP_DR1, |
343 |
|
|
}; |
344 |
|
|
#endif |