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371 lines
11 KiB
371 lines
11 KiB
/* |
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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 "libavutil/mem_internal.h" |
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#include "libavutil/thread.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 "codec_internal.h" |
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#include "config_components.h" |
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#include "decode.h" |
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#include "get_bits.h" |
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#include "idctdsp.h" |
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#include "mpeg12data.h" |
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#include "vlc.h" |
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#define CCP_VLC_BITS 5 |
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#define DC_CCP_VLC_BITS 4 |
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#define AC_CCP_VLC_BITS 6 |
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#define ASV1_LEVEL_VLC_BITS 4 |
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#define ASV2_LEVEL_VLC_BITS 10 |
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static VLCElem ccp_vlc[32]; |
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static VLCElem level_vlc[16]; |
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static VLCElem dc_ccp_vlc[16]; |
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static VLCElem ac_ccp_vlc[64]; |
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static VLCElem asv2_level_vlc[1024]; |
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typedef struct ASVDecContext { |
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ASVCommonContext c; |
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GetBitContext gb; |
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BlockDSPContext bdsp; |
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IDCTDSPContext idsp; |
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uint8_t permutated_scantable[64]; |
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DECLARE_ALIGNED(32, int16_t, block)[6][64]; |
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uint16_t intra_matrix[64]; |
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uint8_t *bitstream_buffer; |
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unsigned int bitstream_buffer_size; |
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} ASVDecContext; |
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static av_cold void init_vlcs(void) |
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{ |
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VLC_INIT_STATIC_TABLE(ccp_vlc, CCP_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, 0); |
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VLC_INIT_STATIC_TABLE(dc_ccp_vlc, DC_CCP_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, VLC_INIT_LE); |
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VLC_INIT_STATIC_TABLE(ac_ccp_vlc, AC_CCP_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, VLC_INIT_LE); |
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VLC_INIT_STATIC_TABLE(level_vlc, ASV1_LEVEL_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, 0); |
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VLC_INIT_STATIC_TABLE(asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, |
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&ff_asv2_level_tab[0][1], 4, 2, |
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&ff_asv2_level_tab[0][0], 4, 2, VLC_INIT_LE); |
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} |
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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, ASV1_LEVEL_VLC_BITS, 1); |
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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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} |
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// get_vlc2() is big-endian in this file |
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static inline int asv2_get_vlc2(GetBitContext *gb, const VLCElem *table, int bits) |
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{ |
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unsigned int index; |
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int code, n; |
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OPEN_READER(re, gb); |
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UPDATE_CACHE_LE(re, gb); |
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index = SHOW_UBITS_LE(re, gb, bits); |
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code = table[index].sym; |
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n = table[index].len; |
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LAST_SKIP_BITS(re, gb, n); |
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CLOSE_READER(re, gb); |
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return code; |
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} |
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static inline int asv2_get_level(GetBitContext *gb) |
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{ |
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int code = asv2_get_vlc2(gb, asv2_level_vlc, ASV2_LEVEL_VLC_BITS); |
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if (code == 31) |
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return (int8_t) get_bits_le(gb, 8); |
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else |
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return code - 31; |
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} |
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static inline int asv1_decode_block(ASVDecContext *a, int16_t block[64]) |
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{ |
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int i; |
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block[0] = 8 * get_bits(&a->gb, 8); |
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for (i = 0; i < 11; i++) { |
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const int ccp = get_vlc2(&a->gb, ccp_vlc, CCP_VLC_BITS, 1); |
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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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av_log(a->c.avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if (ccp & 8) |
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block[a->permutated_scantable[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->permutated_scantable[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->permutated_scantable[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->permutated_scantable[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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return 0; |
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} |
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static inline int asv2_decode_block(ASVDecContext *a, int16_t block[64]) |
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{ |
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int i, count, ccp; |
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count = get_bits_le(&a->gb, 4); |
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block[0] = 8 * get_bits_le(&a->gb, 8); |
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ccp = asv2_get_vlc2(&a->gb, dc_ccp_vlc, DC_CCP_VLC_BITS); |
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if (ccp) { |
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if (ccp & 4) |
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block[a->permutated_scantable[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4; |
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if (ccp & 2) |
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block[a->permutated_scantable[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4; |
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if (ccp & 1) |
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block[a->permutated_scantable[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4; |
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} |
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for (i = 1; i < count + 1; i++) { |
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const int ccp = asv2_get_vlc2(&a->gb, ac_ccp_vlc, AC_CCP_VLC_BITS); |
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if (ccp) { |
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if (ccp & 8) |
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block[a->permutated_scantable[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->permutated_scantable[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->permutated_scantable[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->permutated_scantable[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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return 0; |
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} |
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static inline int decode_mb(ASVDecContext *a, int16_t block[6][64]) |
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{ |
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int i, ret; |
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a->bdsp.clear_blocks(block[0]); |
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if (a->c.avctx->codec_id == AV_CODEC_ID_ASV1) { |
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for (i = 0; i < 6; i++) { |
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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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for (i = 0; i < 6; i++) { |
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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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return 0; |
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} |
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static inline void idct_put(ASVDecContext *a, AVFrame *frame, int mb_x, int mb_y) |
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{ |
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int16_t(*block)[64] = a->block; |
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int linesize = frame->linesize[0]; |
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uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16; |
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uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8; |
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uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8; |
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a->idsp.idct_put(dest_y, linesize, block[0]); |
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a->idsp.idct_put(dest_y + 8, linesize, block[1]); |
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a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]); |
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a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]); |
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if (!(a->c.avctx->flags & AV_CODEC_FLAG_GRAY)) { |
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a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]); |
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a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]); |
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} |
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} |
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static int decode_frame(AVCodecContext *avctx, AVFrame *p, |
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int *got_frame, AVPacket *avpkt) |
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{ |
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ASVDecContext *const a = avctx->priv_data; |
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const ASVCommonContext *const c = &a->c; |
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const uint8_t *buf = avpkt->data; |
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int buf_size = avpkt->size; |
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int ret; |
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if (buf_size * 8LL < c->mb_height * c->mb_width * 13LL) |
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return AVERROR_INVALIDDATA; |
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
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return ret; |
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if (avctx->codec_id == AV_CODEC_ID_ASV1) { |
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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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c->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer, |
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(const uint32_t *) buf, buf_size / 4); |
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ret = init_get_bits8(&a->gb, a->bitstream_buffer, buf_size); |
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} else { |
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ret = init_get_bits8_le(&a->gb, buf, buf_size); |
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} |
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if (ret < 0) |
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return ret; |
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for (int mb_y = 0; mb_y < c->mb_height2; mb_y++) { |
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for (int mb_x = 0; mb_x < c->mb_width2; mb_x++) { |
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if ((ret = decode_mb(a, a->block)) < 0) |
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return ret; |
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idct_put(a, p, mb_x, mb_y); |
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} |
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} |
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if (c->mb_width2 != c->mb_width) { |
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int mb_x = c->mb_width2; |
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for (int mb_y = 0; mb_y < c->mb_height2; mb_y++) { |
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if ((ret = decode_mb(a, a->block)) < 0) |
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return ret; |
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idct_put(a, p, mb_x, mb_y); |
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} |
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} |
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if (c->mb_height2 != c->mb_height) { |
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int mb_y = c->mb_height2; |
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for (int mb_x = 0; mb_x < c->mb_width; mb_x++) { |
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if ((ret = decode_mb(a, a->block)) < 0) |
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return ret; |
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idct_put(a, p, mb_x, mb_y); |
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} |
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} |
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*got_frame = 1; |
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return (get_bits_count(&a->gb) + 31) / 32 * 4; |
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} |
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static av_cold int decode_init(AVCodecContext *avctx) |
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{ |
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static AVOnce init_static_once = AV_ONCE_INIT; |
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ASVDecContext *const a = avctx->priv_data; |
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const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; |
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int inv_qscale; |
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int i; |
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if (avctx->extradata_size < 1) { |
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av_log(avctx, AV_LOG_WARNING, "No extradata provided\n"); |
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} |
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ff_asv_common_init(avctx); |
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ff_blockdsp_init(&a->bdsp); |
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ff_idctdsp_init(&a->idsp, avctx); |
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ff_permute_scantable(a->permutated_scantable, ff_asv_scantab, |
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a->idsp.idct_permutation); |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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if (avctx->extradata_size < 1 || (inv_qscale = avctx->extradata[0]) == 0) { |
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av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n"); |
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if (avctx->codec_id == AV_CODEC_ID_ASV1) |
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inv_qscale = 6; |
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else |
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inv_qscale = 10; |
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} |
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for (i = 0; i < 64; i++) { |
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int index = ff_asv_scantab[i]; |
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a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] / |
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inv_qscale; |
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} |
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ff_thread_once(&init_static_once, init_vlcs); |
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return 0; |
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} |
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static av_cold int decode_end(AVCodecContext *avctx) |
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{ |
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ASVDecContext *const a = avctx->priv_data; |
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av_freep(&a->bitstream_buffer); |
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a->bitstream_buffer_size = 0; |
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return 0; |
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} |
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#if CONFIG_ASV1_DECODER |
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const FFCodec ff_asv1_decoder = { |
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.p.name = "asv1", |
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CODEC_LONG_NAME("ASUS V1"), |
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.p.type = AVMEDIA_TYPE_VIDEO, |
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.p.id = AV_CODEC_ID_ASV1, |
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.priv_data_size = sizeof(ASVDecContext), |
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.init = decode_init, |
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.close = decode_end, |
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FF_CODEC_DECODE_CB(decode_frame), |
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.p.capabilities = AV_CODEC_CAP_DR1, |
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}; |
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#endif |
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#if CONFIG_ASV2_DECODER |
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const FFCodec ff_asv2_decoder = { |
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.p.name = "asv2", |
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CODEC_LONG_NAME("ASUS V2"), |
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.p.type = AVMEDIA_TYPE_VIDEO, |
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.p.id = AV_CODEC_ID_ASV2, |
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.priv_data_size = sizeof(ASVDecContext), |
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.init = decode_init, |
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FF_CODEC_DECODE_CB(decode_frame), |
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.p.capabilities = AV_CODEC_CAP_DR1, |
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}; |
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#endif
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