mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.8 KiB
89 lines
2.8 KiB
/* |
|
* Apple ProRes compatible decoder |
|
* |
|
* Copyright (c) 2010-2011 Maxim Poliakovski |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "proresdsp.h" |
|
#include "simple_idct.h" |
|
#include "libavutil/common.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 |
|
/** |
|
* Add bias value, clamp and output pixels of a slice |
|
*/ |
|
static void put_pixels(uint16_t *dst, int stride, const DCTELEM *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, DCTELEM *block, const int16_t *qmat) |
|
{ |
|
ff_prores_idct(block, qmat); |
|
put_pixels(out, linesize >> 1, block); |
|
} |
|
#endif |
|
|
|
#if CONFIG_PRORES_ENCODER |
|
static void prores_fdct_c(const uint16_t *src, int linesize, DCTELEM *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 |
|
|
|
void ff_proresdsp_init(ProresDSPContext *dsp) |
|
{ |
|
#if CONFIG_PRORES_DECODER |
|
dsp->idct_put = prores_idct_put_c; |
|
dsp->idct_permutation_type = FF_NO_IDCT_PERM; |
|
|
|
if (ARCH_X86) ff_proresdsp_x86_init(dsp); |
|
|
|
ff_init_scantable_permutation(dsp->idct_permutation, |
|
dsp->idct_permutation_type); |
|
#endif |
|
#if CONFIG_PRORES_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 |
|
}
|
|
|