bowen liu / Mbed OS mbed-os-example-blinky

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of mbed-os-example-mbed5-blinky by mbed-os-examples

DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/fftwrap.h@47:9e361da97763, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:54:45 2017 +0800
Revision:
47:9e361da97763
?

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TMBOY 47:9e361da97763 1 /* Copyright (C) 2005 Jean-Marc Valin
TMBOY 47:9e361da97763 2 File: fftwrap.h
TMBOY 47:9e361da97763 3
TMBOY 47:9e361da97763 4 Wrapper for various FFTs
TMBOY 47:9e361da97763 5
TMBOY 47:9e361da97763 6 Redistribution and use in source and binary forms, with or without
TMBOY 47:9e361da97763 7 modification, are permitted provided that the following conditions
TMBOY 47:9e361da97763 8 are met:
TMBOY 47:9e361da97763 9
TMBOY 47:9e361da97763 10 - Redistributions of source code must retain the above copyright
TMBOY 47:9e361da97763 11 notice, this list of conditions and the following disclaimer.
TMBOY 47:9e361da97763 12
TMBOY 47:9e361da97763 13 - Redistributions in binary form must reproduce the above copyright
TMBOY 47:9e361da97763 14 notice, this list of conditions and the following disclaimer in the
TMBOY 47:9e361da97763 15 documentation and/or other materials provided with the distribution.
TMBOY 47:9e361da97763 16
TMBOY 47:9e361da97763 17 - Neither the name of the Xiph.org Foundation nor the names of its
TMBOY 47:9e361da97763 18 contributors may be used to endorse or promote products derived from
TMBOY 47:9e361da97763 19 this software without specific prior written permission.
TMBOY 47:9e361da97763 20
TMBOY 47:9e361da97763 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
TMBOY 47:9e361da97763 22 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
TMBOY 47:9e361da97763 23 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
TMBOY 47:9e361da97763 24 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
TMBOY 47:9e361da97763 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
TMBOY 47:9e361da97763 26 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
TMBOY 47:9e361da97763 27 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
TMBOY 47:9e361da97763 28 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
TMBOY 47:9e361da97763 29 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
TMBOY 47:9e361da97763 30 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
TMBOY 47:9e361da97763 31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
TMBOY 47:9e361da97763 32
TMBOY 47:9e361da97763 33 */
TMBOY 47:9e361da97763 34
TMBOY 47:9e361da97763 35 #ifndef FFTWRAP_H
TMBOY 47:9e361da97763 36 #define FFTWRAP_H
TMBOY 47:9e361da97763 37
TMBOY 47:9e361da97763 38 #include "misc.h"
TMBOY 47:9e361da97763 39
TMBOY 47:9e361da97763 40 /** Compute tables for an FFT */
TMBOY 47:9e361da97763 41 void *spx_fft_init(int size);
TMBOY 47:9e361da97763 42
TMBOY 47:9e361da97763 43 /** Destroy tables for an FFT */
TMBOY 47:9e361da97763 44 void spx_fft_destroy(void *table);
TMBOY 47:9e361da97763 45
TMBOY 47:9e361da97763 46 /** Forward (real to half-complex) transform */
TMBOY 47:9e361da97763 47 void spx_fft(void *table, spx_word16_t *in, spx_word16_t *out);
TMBOY 47:9e361da97763 48
TMBOY 47:9e361da97763 49 /** Backward (half-complex to real) transform */
TMBOY 47:9e361da97763 50 void spx_ifft(void *table, spx_word16_t *in, spx_word16_t *out);
TMBOY 47:9e361da97763 51
TMBOY 47:9e361da97763 52 /** Forward (real to half-complex) transform of float data */
TMBOY 47:9e361da97763 53 void spx_fft_float(void *table, float *in, float *out);
TMBOY 47:9e361da97763 54
TMBOY 47:9e361da97763 55 /** Backward (half-complex to real) transform of float data */
TMBOY 47:9e361da97763 56 void spx_ifft_float(void *table, float *in, float *out);
TMBOY 47:9e361da97763 57
TMBOY 47:9e361da97763 58 #endif