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 28 typedef int32_t dwtcoef; 29 30 enum 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 42 typedef 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 50 int ff_vc2enc_init_transforms(VC2TransformContext *t, int p_stride, int p_height, 51 int slice_w, int slice_h); 52 void ff_vc2enc_free_transforms(VC2TransformContext *t); 53 54 #endif /* AVCODEC_VC2ENC_DWT_H */ 55