diff options
author | Mans Rullgard <mans@mansr.com> | 2011-03-20 02:14:25 +0000 |
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committer | Mans Rullgard <mans@mansr.com> | 2011-03-20 17:15:33 +0000 |
commit | 0aded9484da7da6fe23254e23382767635f8360a (patch) | |
tree | 0985f60e2b35fb272782726c00e2ccb78cae3519 /libavcodec/rdft.h | |
parent | 4538729afed44a0ee0a762d3ef69aa4bbb7f10b3 (diff) | |
download | ffmpeg-0aded9484da7da6fe23254e23382767635f8360a.tar.gz |
Move dct and rdft definitions to separate files
This leaves fft.h with only the core FFT and MDCT definitions
thus making it more managable.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec/rdft.h')
-rw-r--r-- | libavcodec/rdft.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libavcodec/rdft.h b/libavcodec/rdft.h new file mode 100644 index 0000000000..7572c6c76d --- /dev/null +++ b/libavcodec/rdft.h @@ -0,0 +1,74 @@ +/* + * (I)RDFT transforms + * Copyright (c) 2009 Alex Converse <alex dot converse at gmail dot com> + * + * 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_RDFT_H +#define AVCODEC_RDFT_H + +#include "config.h" +#include "fft.h" + +#if CONFIG_HARDCODED_TABLES +# define SINTABLE_CONST const +#else +# define SINTABLE_CONST +#endif + +#define SINTABLE(size) \ + SINTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_sin_##size)[size/2] + +extern SINTABLE(16); +extern SINTABLE(32); +extern SINTABLE(64); +extern SINTABLE(128); +extern SINTABLE(256); +extern SINTABLE(512); +extern SINTABLE(1024); +extern SINTABLE(2048); +extern SINTABLE(4096); +extern SINTABLE(8192); +extern SINTABLE(16384); +extern SINTABLE(32768); +extern SINTABLE(65536); + +struct RDFTContext { + int nbits; + int inverse; + int sign_convention; + + /* pre/post rotation tables */ + const FFTSample *tcos; + SINTABLE_CONST FFTSample *tsin; + FFTContext fft; + void (*rdft_calc)(struct RDFTContext *s, FFTSample *z); +}; + +/** + * Set up a real FFT. + * @param nbits log2 of the length of the input array + * @param trans the type of transform + */ +int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans); +void ff_rdft_end(RDFTContext *s); + +void ff_rdft_init_arm(RDFTContext *s); + + +#endif |