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
25
27
28 /**
29 * Scantable.
30 */
36
44 };
45
52
54 /* pixel ops : interface with DCT */
57 ptrdiff_t line_size);
60 ptrdiff_t line_size);
63 ptrdiff_t line_size);
64
66
67 /**
68 * block -> idct -> clip to unsigned 8 bit -> dest.
69 * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...)
70 * @param line_size size in bytes of a horizontal line of dest
71 */
73 ptrdiff_t line_size, int16_t *
block /* align 16 */);
74
75 /**
76 * block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
77 * @param line_size size in bytes of a horizontal line of dest
78 */
80 ptrdiff_t line_size, int16_t *
block /* align 16 */);
81
82 /**
83 * IDCT input permutation.
84 * Several optimized IDCTs need a permutated input (relative to the
85 * normal order of the reference IDCT).
86 * This permutation must be performed before the idct_put/add.
87 * Note, normally this can be merged with the zigzag/alternate scan<br>
88 * An example to avoid confusion:
89 * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...)
90 * - (x -> reference DCT -> reference IDCT -> x)
91 * - (x -> reference DCT -> simple_mmx_perm = idct_permutation
92 * -> simple_idct_mmx -> x)
93 * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant
94 * -> simple_idct_mmx -> ...)
95 */
99
101 ptrdiff_t line_size);
103 ptrdiff_t line_size);
104
106
108 unsigned high_bit_depth);
110 unsigned high_bit_depth);
112 unsigned high_bit_depth);
114 unsigned high_bit_depth);
116 unsigned high_bit_depth);
118 unsigned high_bit_depth);
119
120 #endif /* AVCODEC_IDCTDSP_H */
void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
int ff_init_scantable_permutation_x86(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
void ff_add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
void(* add_pixels_clamped)(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
const uint8_t * scantable
void(* put_pixels_clamped)(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
void ff_idctdsp_init_mips(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
void ff_idctdsp_init_aarch64(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
uint8_t idct_permutation[64]
IDCT input permutation.
void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Libavcodec external API header.
void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
main external API structure.
void(* idct_add)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
void(* put_signed_pixels_clamped)(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
void(* idct_put)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
void ff_put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)
enum idct_permutation_type perm_type
void(* idct)(int16_t *block)