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Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/rdft.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/rdft.h b/media/ffvpx/libavcodec/rdft.h new file mode 100644 index 0000000000..ffafca7f24 --- /dev/null +++ b/media/ffvpx/libavcodec/rdft.h @@ -0,0 +1,52 @@ +/* + * (I)RDFT transforms + * Copyright (c) 2009 Alex Converse <alex dot converse at gmail dot com> + * + * 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 + */ + +#if !defined(AVCODEC_RDFT_H) && (!defined(FFT_FLOAT) || FFT_FLOAT) +#define AVCODEC_RDFT_H + +#include "config.h" +#include "fft.h" + +struct RDFTContext { + int nbits; + int inverse; + int sign_convention; + + /* pre/post rotation tables */ + const FFTSample *tcos; + const FFTSample *tsin; + int negative_sin; + 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 /* AVCODEC_RDFT_H */ |