fft.h
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:1k
源码类别:
midi
开发平台:
Unix_Linux
- /*
- * WMA compatible decoder
- * Copyright (c) 2002 The FFmpeg Project.
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #ifndef WMA_FFT_H
- #define WMA_FFT_H 1
- #include <inttypes.h>
- typedef int32_t FFTSample;
- typedef struct FFTComplex
- {
- int32_t re, im;
- }
- FFTComplex;
- typedef struct FFTContext
- {
- int nbits;
- int inverse;
- uint16_t *revtab;
- FFTComplex *exptab;
- FFTComplex *exptab1; /* only used by SSE code */
- int (*fft_calc)(struct FFTContext *s, FFTComplex *z);
- }
- FFTContext;
- int fft_calc_unscaled(FFTContext *s, FFTComplex *z);
- int fft_init_global(void);
- #endif