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b3c3996212
Using the first names of authors sounds somewhat unprofessional and might be considered offensive which is not intended. The new names use the initials of the authors due to simplicity and the possibility to apply it consistently without the need to find political correct names for each future case where alternative codecs might exist. Also its shorter ... If someone has a better idea, like maybe 2 random letters and people prefer it then iam happy to switch to that ... Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
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* Apple ProRes compatible decoder
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*
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* Copyright (c) 2010-2011 Maxim Poliakovski
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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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#include "dct.h"
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#include "dsputil.h"
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#include "proresdsp.h"
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#include "simple_idct.h"
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#include "libavutil/common.h"
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#define BIAS (1 << (PRORES_BITS_PER_SAMPLE - 1)) ///< bias value for converting signed pixels into unsigned ones
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#define CLIP_MIN (1 << (PRORES_BITS_PER_SAMPLE - 8)) ///< minimum value for clipping resulting pixels
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#define CLIP_MAX (1 << PRORES_BITS_PER_SAMPLE) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
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#define CLIP_AND_BIAS(x) (av_clip((x) + BIAS, CLIP_MIN, CLIP_MAX))
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#if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER
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/**
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* Add bias value, clamp and output pixels of a slice
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*/
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static void put_pixels(uint16_t *dst, int stride, const int16_t *in)
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{
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int x, y, src_offset, dst_offset;
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for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += stride) {
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for (x = 0; x < 8; x++) {
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src_offset = (y << 3) + x;
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dst[dst_offset + x] = CLIP_AND_BIAS(in[src_offset]);
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}
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}
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}
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static void prores_idct_put_c(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat)
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{
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ff_prores_idct(block, qmat);
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put_pixels(out, linesize >> 1, block);
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}
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#endif
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#if CONFIG_PRORES_KS_ENCODER
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static void prores_fdct_c(const uint16_t *src, int linesize, int16_t *block)
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{
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int x, y;
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const uint16_t *tsrc = src;
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for (y = 0; y < 8; y++) {
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for (x = 0; x < 8; x++)
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block[y * 8 + x] = tsrc[x];
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tsrc += linesize >> 1;
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}
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ff_jpeg_fdct_islow_10(block);
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}
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#endif
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void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)
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{
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#if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER
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dsp->idct_put = prores_idct_put_c;
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dsp->idct_permutation_type = FF_NO_IDCT_PERM;
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if (ARCH_X86) ff_proresdsp_x86_init(dsp, avctx);
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ff_init_scantable_permutation(dsp->idct_permutation,
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dsp->idct_permutation_type);
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#endif
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#if CONFIG_PRORES_KS_ENCODER
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dsp->fdct = prores_fdct_c;
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dsp->dct_permutation_type = FF_NO_IDCT_PERM;
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ff_init_scantable_permutation(dsp->dct_permutation,
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dsp->dct_permutation_type);
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#endif
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}
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