1/*
2 * Copyright (C) 2016 Open Broadcast Systems Ltd.
3 * Author        2016 Rostislav Pehlivanov <atomnuker@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_VC2ENC_DWT_H
23#define AVCODEC_VC2ENC_DWT_H
24
25#include <stddef.h>
26#include <stdint.h>
27
28typedef int32_t dwtcoef;
29
30enum VC2TransformType {
31    VC2_TRANSFORM_9_7    = 0,   /* Deslauriers-Dubuc (9,7)  */
32    VC2_TRANSFORM_5_3    = 1,   /* LeGall (5,3)             */
33    VC2_TRANSFORM_13_7   = 2,   /* Deslauriers-Dubuc (13,7) */
34    VC2_TRANSFORM_HAAR   = 3,   /* Haar without shift       */
35    VC2_TRANSFORM_HAAR_S = 4,   /* Haar with 1 shift/lvl    */
36    VC2_TRANSFORM_FIDEL  = 5,   /* Fidelity filter          */
37    VC2_TRANSFORM_9_7_I  = 6,   /* Daubechies (9,7)         */
38
39    VC2_TRANSFORMS_NB
40};
41
42typedef struct VC2TransformContext {
43    dwtcoef *buffer;
44    int padding;
45    void (*vc2_subband_dwt[VC2_TRANSFORMS_NB])(struct VC2TransformContext *t,
46                                               dwtcoef *data, ptrdiff_t stride,
47                                               int width, int height);
48} VC2TransformContext;
49
50int  ff_vc2enc_init_transforms(VC2TransformContext *t, int p_stride, int p_height,
51                               int slice_w, int slice_h);
52void ff_vc2enc_free_transforms(VC2TransformContext *t);
53
54#endif /* AVCODEC_VC2ENC_DWT_H */
55