From 83654c7b1b598add9041c7add6b77478eb91177f Mon Sep 17 00:00:00 2001 From: Kamil Nowosad Date: Mon, 23 May 2011 23:13:34 +0200 Subject: Add Kamil Nowosads j2k code. This needs work but it should not rot in soc svn. --- libavcodec/j2k_dwt.h | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 libavcodec/j2k_dwt.h (limited to 'libavcodec/j2k_dwt.h') diff --git a/libavcodec/j2k_dwt.h b/libavcodec/j2k_dwt.h new file mode 100644 index 0000000000..a2a25a6891 --- /dev/null +++ b/libavcodec/j2k_dwt.h @@ -0,0 +1,63 @@ +/* + * Discrete wavelet transform + * Copyright (c) 2007 Kamil Nowosad + * + * 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_DWT_H +#define AVCODEC_DWT_H + +/** + * Discrete wavelet transform + * @file + * @author Kamil Nowosad + */ + +#include "avcodec.h" + +#define FF_DWT_MAX_DECLVLS 32 ///< max number of decomposition levels + +enum DWTType{ + FF_DWT97, + FF_DWT53 +}; + +typedef struct { + ///line lengths {horizontal, vertical} in consecutive decomposition levels + uint16_t linelen[FF_DWT_MAX_DECLVLS][2]; + uint8_t mod[FF_DWT_MAX_DECLVLS][2]; ///< coordinates (x0, y0) of decomp. levels mod 2 + uint8_t ndeclevels; ///< number of decomposition levels + uint8_t type; ///< 0 for 9/7; 1 for 5/3 + void *linebuf; ///< buffer used by transform (int or float) +} DWTContext; + +/** + * initialize DWT + * @param s DWT context + * @param border coordinates of transformed region {{x0, x1}, {y0, y1}} + * @param decomp_levels number of decomposition levels + * @param type 0 for DWT 9/7; 1 for DWT 5/3 + */ +int ff_j2k_dwt_init(DWTContext *s, uint16_t border[2][2], int decomp_levels, int type); + +int ff_j2k_dwt_encode(DWTContext *s, int *t); +int ff_j2k_dwt_decode(DWTContext *s, int *t); + +void ff_j2k_dwt_destroy(DWTContext *s); + +#endif /* AVCODEC_DWT_H */ -- cgit v1.2.3