92fb52d9 |
/*
* Apple ProRes compatible decoder
*
* Copyright (c) 2010-2011 Maxim Poliakovski
* |
d814a839 |
* This file is part of FFmpeg. |
92fb52d9 |
* |
d814a839 |
* FFmpeg is free software; you can redistribute it and/or |
92fb52d9 |
* 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.
* |
d814a839 |
* FFmpeg is distributed in the hope that it will be useful, |
92fb52d9 |
* 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 |
d814a839 |
* License along with FFmpeg; if not, write to the Free Software |
92fb52d9 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
|
92e598a5 |
#include "config.h" |
6fee1b90 |
#include "libavutil/attributes.h"
#include "libavutil/common.h" |
88bd7fdc |
#include "dsputil.h" |
92fb52d9 |
#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
|
b821def9 |
#define CLIP(x) (av_clip((x), CLIP_MIN, CLIP_MAX)) |
92fb52d9 |
/**
* Add bias value, clamp and output pixels of a slice
*/ |
88bd7fdc |
static void put_pixels(uint16_t *dst, int stride, const int16_t *in) |
92fb52d9 |
{
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;
|
b821def9 |
dst[dst_offset + x] = CLIP(in[src_offset]); |
92fb52d9 |
}
}
}
|
88bd7fdc |
static void prores_idct_put_c(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat) |
92fb52d9 |
{
ff_prores_idct(block, qmat);
put_pixels(out, linesize >> 1, block);
} |
1a265f61 |
|
0aa09548 |
av_cold void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx) |
92fb52d9 |
{
dsp->idct_put = prores_idct_put_c;
dsp->idct_permutation_type = FF_NO_IDCT_PERM;
|
b2365049 |
if (ARCH_X86) |
5ba16483 |
ff_proresdsp_init_x86(dsp, avctx); |
e3f530fe |
|
92fb52d9 |
ff_init_scantable_permutation(dsp->idct_permutation,
dsp->idct_permutation_type);
} |