yading@10: /* yading@10: * Apple ProRes compatible decoder yading@10: * yading@10: * Copyright (c) 2010-2011 Maxim Poliakovski yading@10: * yading@10: * This file is part of Libav. yading@10: * yading@10: * Libav is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * Libav is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with Libav; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #include "dct.h" yading@10: #include "dsputil.h" yading@10: #include "proresdsp.h" yading@10: #include "simple_idct.h" yading@10: #include "libavutil/common.h" yading@10: yading@10: #define BIAS (1 << (PRORES_BITS_PER_SAMPLE - 1)) ///< bias value for converting signed pixels into unsigned ones yading@10: #define CLIP_MIN (1 << (PRORES_BITS_PER_SAMPLE - 8)) ///< minimum value for clipping resulting pixels yading@10: #define CLIP_MAX (1 << PRORES_BITS_PER_SAMPLE) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels yading@10: yading@10: #define CLIP_AND_BIAS(x) (av_clip((x) + BIAS, CLIP_MIN, CLIP_MAX)) yading@10: yading@10: #if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER yading@10: /** yading@10: * Add bias value, clamp and output pixels of a slice yading@10: */ yading@10: static void put_pixels(uint16_t *dst, int stride, const int16_t *in) yading@10: { yading@10: int x, y, src_offset, dst_offset; yading@10: yading@10: for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += stride) { yading@10: for (x = 0; x < 8; x++) { yading@10: src_offset = (y << 3) + x; yading@10: yading@10: dst[dst_offset + x] = CLIP_AND_BIAS(in[src_offset]); yading@10: } yading@10: } yading@10: } yading@10: yading@10: static void prores_idct_put_c(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat) yading@10: { yading@10: ff_prores_idct(block, qmat); yading@10: put_pixels(out, linesize >> 1, block); yading@10: } yading@10: #endif yading@10: yading@10: #if CONFIG_PRORES_KS_ENCODER yading@10: static void prores_fdct_c(const uint16_t *src, int linesize, int16_t *block) yading@10: { yading@10: int x, y; yading@10: const uint16_t *tsrc = src; yading@10: yading@10: for (y = 0; y < 8; y++) { yading@10: for (x = 0; x < 8; x++) yading@10: block[y * 8 + x] = tsrc[x]; yading@10: tsrc += linesize >> 1; yading@10: } yading@10: ff_jpeg_fdct_islow_10(block); yading@10: } yading@10: #endif yading@10: yading@10: void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx) yading@10: { yading@10: #if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER yading@10: dsp->idct_put = prores_idct_put_c; yading@10: dsp->idct_permutation_type = FF_NO_IDCT_PERM; yading@10: yading@10: if (ARCH_X86) ff_proresdsp_x86_init(dsp, avctx); yading@10: yading@10: ff_init_scantable_permutation(dsp->idct_permutation, yading@10: dsp->idct_permutation_type); yading@10: #endif yading@10: #if CONFIG_PRORES_KS_ENCODER yading@10: dsp->fdct = prores_fdct_c; yading@10: dsp->dct_permutation_type = FF_NO_IDCT_PERM; yading@10: ff_init_scantable_permutation(dsp->dct_permutation, yading@10: dsp->dct_permutation_type); yading@10: #endif yading@10: }