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2ba45a60 DM |
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 <stdint.h> | |
23 | ||
24 | #include "avcodec.h" | |
25 | ||
26 | /** | |
27 | * Scantable. | |
28 | */ | |
29 | typedef struct ScanTable { | |
30 | const uint8_t *scantable; | |
31 | uint8_t permutated[64]; | |
32 | uint8_t raster_end[64]; | |
33 | } ScanTable; | |
34 | ||
35 | enum idct_permutation_type { | |
36 | FF_IDCT_PERM_NONE, | |
37 | FF_IDCT_PERM_LIBMPEG2, | |
38 | FF_IDCT_PERM_SIMPLE, | |
39 | FF_IDCT_PERM_TRANSPOSE, | |
40 | FF_IDCT_PERM_PARTTRANS, | |
41 | FF_IDCT_PERM_SSE2, | |
42 | }; | |
43 | ||
44 | void ff_init_scantable(uint8_t *permutation, ScanTable *st, | |
45 | const uint8_t *src_scantable); | |
46 | void ff_init_scantable_permutation(uint8_t *idct_permutation, | |
47 | enum idct_permutation_type perm_type); | |
48 | int ff_init_scantable_permutation_x86(uint8_t *idct_permutation, | |
49 | enum idct_permutation_type perm_type); | |
50 | ||
51 | typedef struct IDCTDSPContext { | |
52 | /* pixel ops : interface with DCT */ | |
53 | void (*put_pixels_clamped)(const int16_t *block /* align 16 */, | |
54 | uint8_t *pixels /* align 8 */, | |
f6fa7814 | 55 | ptrdiff_t line_size); |
2ba45a60 DM |
56 | void (*put_signed_pixels_clamped)(const int16_t *block /* align 16 */, |
57 | uint8_t *pixels /* align 8 */, | |
f6fa7814 | 58 | ptrdiff_t line_size); |
2ba45a60 DM |
59 | void (*add_pixels_clamped)(const int16_t *block /* align 16 */, |
60 | uint8_t *pixels /* align 8 */, | |
f6fa7814 | 61 | ptrdiff_t line_size); |
2ba45a60 DM |
62 | |
63 | void (*idct)(int16_t *block /* align 16 */); | |
64 | ||
65 | /** | |
66 | * block -> idct -> clip to unsigned 8 bit -> dest. | |
67 | * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...) | |
68 | * @param line_size size in bytes of a horizontal line of dest | |
69 | */ | |
70 | void (*idct_put)(uint8_t *dest /* align 8 */, | |
71 | int line_size, int16_t *block /* align 16 */); | |
72 | ||
73 | /** | |
74 | * block -> idct -> add dest -> clip to unsigned 8 bit -> dest. | |
75 | * @param line_size size in bytes of a horizontal line of dest | |
76 | */ | |
77 | void (*idct_add)(uint8_t *dest /* align 8 */, | |
78 | int line_size, int16_t *block /* align 16 */); | |
79 | ||
80 | /** | |
81 | * IDCT input permutation. | |
82 | * Several optimized IDCTs need a permutated input (relative to the | |
83 | * normal order of the reference IDCT). | |
84 | * This permutation must be performed before the idct_put/add. | |
85 | * Note, normally this can be merged with the zigzag/alternate scan<br> | |
86 | * An example to avoid confusion: | |
87 | * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...) | |
88 | * - (x -> reference DCT -> reference IDCT -> x) | |
89 | * - (x -> reference DCT -> simple_mmx_perm = idct_permutation | |
90 | * -> simple_idct_mmx -> x) | |
91 | * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant | |
92 | * -> simple_idct_mmx -> ...) | |
93 | */ | |
94 | uint8_t idct_permutation[64]; | |
95 | enum idct_permutation_type perm_type; | |
96 | } IDCTDSPContext; | |
97 | ||
f6fa7814 DM |
98 | extern void (*ff_put_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size); |
99 | extern void (*ff_add_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size); | |
2ba45a60 DM |
100 | |
101 | void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx); | |
102 | ||
103 | void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx, | |
104 | unsigned high_bit_depth); | |
105 | void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, | |
106 | unsigned high_bit_depth); | |
107 | void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, | |
108 | unsigned high_bit_depth); | |
109 | void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, | |
110 | unsigned high_bit_depth); | |
111 | ||
112 | #endif /* AVCODEC_IDCTDSP_H */ |