| 0,0 → 1,92 |
|---|
| /* |
| * Apple ProRes compatible decoder |
| * |
| * Copyright (c) 2010-2011 Maxim Poliakovski |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/common.h" |
| #include "dct.h" |
| #include "dsputil.h" |
| #include "proresdsp.h" |
| #include "simple_idct.h" |
| |
| #define BIAS (1 << (PRORES_BITS_PER_SAMPLE - 1)) ///< bias value for converting signed pixels into unsigned ones |
| #define CLIP_MIN (1 << (PRORES_BITS_PER_SAMPLE - 8)) ///< minimum value for clipping resulting pixels |
| #define CLIP_MAX (1 << PRORES_BITS_PER_SAMPLE) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels |
| |
| #define CLIP_AND_BIAS(x) (av_clip((x) + BIAS, CLIP_MIN, CLIP_MAX)) |
| |
| #if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER |
| /** |
| * Add bias value, clamp and output pixels of a slice |
| */ |
| static void put_pixels(uint16_t *dst, int stride, const int16_t *in) |
| { |
| int x, y, src_offset, dst_offset; |
| |
| for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += stride) { |
| for (x = 0; x < 8; x++) { |
| src_offset = (y << 3) + x; |
| |
| dst[dst_offset + x] = CLIP_AND_BIAS(in[src_offset]); |
| } |
| } |
| } |
| |
| static void prores_idct_put_c(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat) |
| { |
| ff_prores_idct(block, qmat); |
| put_pixels(out, linesize >> 1, block); |
| } |
| #endif |
| |
| #if CONFIG_PRORES_KS_ENCODER |
| static void prores_fdct_c(const uint16_t *src, int linesize, int16_t *block) |
| { |
| int x, y; |
| const uint16_t *tsrc = src; |
| |
| for (y = 0; y < 8; y++) { |
| for (x = 0; x < 8; x++) |
| block[y * 8 + x] = tsrc[x]; |
| tsrc += linesize >> 1; |
| } |
| ff_jpeg_fdct_islow_10(block); |
| } |
| #endif |
| |
| av_cold void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx) |
| { |
| #if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER |
| dsp->idct_put = prores_idct_put_c; |
| dsp->idct_permutation_type = FF_NO_IDCT_PERM; |
| |
| if (ARCH_X86) ff_proresdsp_x86_init(dsp, avctx); |
| |
| ff_init_scantable_permutation(dsp->idct_permutation, |
| dsp->idct_permutation_type); |
| #endif |
| #if CONFIG_PRORES_KS_ENCODER |
| dsp->fdct = prores_fdct_c; |
| dsp->dct_permutation_type = FF_NO_IDCT_PERM; |
| ff_init_scantable_permutation(dsp->dct_permutation, |
| dsp->dct_permutation_type); |
| #endif |
| } |