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56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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* Copyright (C) 2016 Open Broadcast Systems Ltd.
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* Author 2016 Rostislav Pehlivanov <atomnuker@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_VC2ENC_DWT_H
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#define AVCODEC_VC2ENC_DWT_H
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#include <stddef.h>
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#include <stdint.h>
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typedef int16_t dwtcoef;
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typedef int32_t qcoef; /* Quantization needs more precision */
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/* Only Deslauriers-Dubuc (9,7) and LeGall (5,3) supported! */
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enum VC2TransformType {
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VC2_TRANSFORM_9_7 = 0, /* Deslauriers-Dubuc (9,7) */
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VC2_TRANSFORM_5_3 = 1, /* LeGall (5,3) */
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VC2_TRANSFORM_13_7 = 2, /* Deslauriers-Dubuc (13,7) */
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VC2_TRANSFORM_HAAR = 3, /* Haar without shift */
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VC2_TRANSFORM_HAAR_S = 4, /* Haar with 1 shift/lvl */
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VC2_TRANSFORM_FIDEL = 5, /* Fidelity filter */
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VC2_TRANSFORM_9_7_I = 6, /* Daubechies (9,7) */
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VC2_TRANSFORMS_NB
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};
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typedef struct VC2TransformContext {
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dwtcoef *buffer;
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void (*vc2_subband_dwt[VC2_TRANSFORMS_NB])(struct VC2TransformContext *t,
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dwtcoef *data, ptrdiff_t stride,
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int width, int height);
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} VC2TransformContext;
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int ff_vc2enc_init_transforms(VC2TransformContext *t, int p_width, int p_height);
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void ff_vc2enc_free_transforms(VC2TransformContext *t);
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#endif /* AVCODEC_VC2ENC_DWT_H */
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