1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #ifndef AVCODEC_IDCTDSP_H
20 #define AVCODEC_IDCTDSP_H
21
22 #include <stddef.h>
23 #include <stdint.h>
24
26
34 };
35
37 const uint8_t permutation[64]);
42
44 /* pixel ops : interface with DCT */
46 uint8_t *restrict pixels /* align 8 */,
47 ptrdiff_t line_size);
49 uint8_t *restrict pixels /* align 8 */,
50 ptrdiff_t line_size);
52 uint8_t *restrict pixels /* align 8 */,
53 ptrdiff_t line_size);
54
56
57 /**
58 * block -> idct -> clip to unsigned 8 bit -> dest.
59 * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...)
60 * @param line_size size in bytes of a horizontal line of dest
61 */
63 ptrdiff_t line_size, int16_t *
block /* align 16 */);
64
65 /**
66 * block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
67 * @param line_size size in bytes of a horizontal line of dest
68 */
70 ptrdiff_t line_size, int16_t *
block /* align 16 */);
71
72 /**
73 * IDCT input permutation.
74 * Several optimized IDCTs need a permutated input (relative to the
75 * normal order of the reference IDCT).
76 * This permutation must be performed before the idct_put/add.
77 * Note, normally this can be merged with the zigzag/alternate scan<br>
78 * An example to avoid confusion:
79 * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...)
80 * - (x -> reference DCT -> reference IDCT -> x)
81 * - (x -> reference DCT -> simple_mmx_perm = idct_permutation
82 * -> simple_idct_mmx -> x)
83 * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant
84 * -> simple_idct_mmx -> ...)
85 */
88
91
93 ptrdiff_t line_size);
95 ptrdiff_t line_size);
96
98
100 unsigned high_bit_depth);
102 unsigned high_bit_depth);
104 unsigned high_bit_depth);
106 unsigned high_bit_depth);
108 unsigned high_bit_depth);
110 unsigned high_bit_depth);
112 unsigned high_bit_depth);
114 unsigned high_bit_depth);
115
116 #endif /* AVCODEC_IDCTDSP_H */