From c81a70638116eaf4251075475e5cbb600a33c5ec Mon Sep 17 00:00:00 2001 From: Nicolas Bertrand Date: Mon, 22 Apr 2013 11:41:01 +0200 Subject: JPEG 2000 decoder for DCinema Based on the 2007 GSoC project from Kamil Nowosad Updated to current programming standards, style and many more small fixes by Diego Biurrun . Signed-off-by: Diego Biurrun --- libavcodec/jpeg2000dwt.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 libavcodec/jpeg2000dwt.h (limited to 'libavcodec/jpeg2000dwt.h') diff --git a/libavcodec/jpeg2000dwt.h b/libavcodec/jpeg2000dwt.h new file mode 100644 index 0000000000..9aaa18bacb --- /dev/null +++ b/libavcodec/jpeg2000dwt.h @@ -0,0 +1,64 @@ +/* + * Discrete wavelet transform + * Copyright (c) 2007 Kamil Nowosad + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_JPEG2000DWT_H +#define AVCODEC_JPEG2000DWT_H + +/** + * @file + * Discrete wavelet transform + */ + +#include + +#define FF_DWT_MAX_DECLVLS 32 ///< max number of decomposition levels + +enum DWTType { + FF_DWT97, + FF_DWT53, + FF_DWT97_INT +}; + +typedef struct DWTContext { + /// 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 + int32_t *i_linebuf; ///< int buffer used by transform + float *f_linebuf; ///< float buffer used by transform +} 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_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2], + int decomp_levels, int type); + +int ff_dwt_decode(DWTContext *s, void *t); + +void ff_dwt_destroy(DWTContext *s); + +#endif /* AVCODEC_JPEG2000DWT_H */ -- cgit v1.2.3