blob: 5b5ada21fe0bdfbcbf7db8cea48fb9b5078cfce6
1 | /* |
2 | * Apple ProRes compatible decoder |
3 | * |
4 | * Copyright (c) 2010-2011 Maxim Poliakovski |
5 | * |
6 | * This file is part of FFmpeg. |
7 | * |
8 | * FFmpeg is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU Lesser General Public |
10 | * License as published by the Free Software Foundation; either |
11 | * version 2.1 of the License, or (at your option) any later version. |
12 | * |
13 | * FFmpeg is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU Lesser General Public |
19 | * License along with FFmpeg; if not, write to the Free Software |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
21 | */ |
22 | |
23 | #include "config.h" |
24 | #include "libavutil/attributes.h" |
25 | #include "libavutil/common.h" |
26 | #include "idctdsp.h" |
27 | #include "proresdsp.h" |
28 | #include "simple_idct.h" |
29 | |
30 | #define BIAS (1 << (PRORES_BITS_PER_SAMPLE - 1)) ///< bias value for converting signed pixels into unsigned ones |
31 | #define CLIP_MIN (1 << (PRORES_BITS_PER_SAMPLE - 8)) ///< minimum value for clipping resulting pixels |
32 | #define CLIP_MAX (1 << PRORES_BITS_PER_SAMPLE) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels |
33 | |
34 | #define CLIP(x) (av_clip((x), CLIP_MIN, CLIP_MAX)) |
35 | |
36 | /** |
37 | * Add bias value, clamp and output pixels of a slice |
38 | */ |
39 | static void put_pixels(uint16_t *dst, ptrdiff_t linesize, const int16_t *in) |
40 | { |
41 | int x, y, src_offset, dst_offset; |
42 | |
43 | for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += linesize) { |
44 | for (x = 0; x < 8; x++) { |
45 | src_offset = (y << 3) + x; |
46 | |
47 | dst[dst_offset + x] = CLIP(in[src_offset]); |
48 | } |
49 | } |
50 | } |
51 | |
52 | static void prores_idct_put_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat) |
53 | { |
54 | ff_prores_idct(block, qmat); |
55 | put_pixels(out, linesize >> 1, block); |
56 | } |
57 | |
58 | av_cold void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx) |
59 | { |
60 | dsp->idct_put = prores_idct_put_c; |
61 | dsp->idct_permutation_type = FF_IDCT_PERM_NONE; |
62 | |
63 | if (ARCH_X86) |
64 | ff_proresdsp_init_x86(dsp, avctx); |
65 | |
66 | ff_init_scantable_permutation(dsp->idct_permutation, |
67 | dsp->idct_permutation_type); |
68 | } |
69 |