vc2enc_dwt.h

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/*
 * Copyright (C) 2016 Open Broadcast Systems Ltd.
 * Author        2016 Rostislav Pehlivanov <atomnuker@gmail.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_VC2ENC_DWT_H
#define AVCODEC_VC2ENC_DWT_H

#include <stddef.h>
#include <stdint.h>

typedef int16_t dwtcoef;
typedef int32_t qcoef;   /* Quantization needs more precision */

/* Only Deslauriers-Dubuc (9,7) and LeGall (5,3) supported! */

enum VC2TransformType {
    VC2_TRANSFORM_9_7    = 0,   /* Deslauriers-Dubuc (9,7)  */
    VC2_TRANSFORM_5_3    = 1,   /* LeGall (5,3)             */
    VC2_TRANSFORM_13_7   = 2,   /* Deslauriers-Dubuc (13,7) */
    VC2_TRANSFORM_HAAR   = 3,   /* Haar without shift       */
    VC2_TRANSFORM_HAAR_S = 4,   /* Haar with 1 shift/lvl    */
    VC2_TRANSFORM_FIDEL  = 5,   /* Fidelity filter          */
    VC2_TRANSFORM_9_7_I  = 6,   /* Daubechies (9,7)         */

    VC2_TRANSFORMS_NB
};

typedef struct VC2TransformContext {
    dwtcoef *buffer;
    void (*vc2_subband_dwt[VC2_TRANSFORMS_NB])(struct VC2TransformContext *t,
                                               dwtcoef *data, ptrdiff_t stride,
                                               int width, int height);
} VC2TransformContext;

int  ff_vc2enc_init_transforms(VC2TransformContext *t, int p_width, int p_height);
void ff_vc2enc_free_transforms(VC2TransformContext *t);

#endif /* AVCODEC_VC2ENC_DWT_H */