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89 lines
2.9 KiB
89 lines
2.9 KiB
/* |
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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 "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 DCTELEM *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, DCTELEM *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_KOSTYA_ENCODER |
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static void prores_fdct_c(const uint16_t *src, int linesize, DCTELEM *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_KOSTYA_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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