gstreamer/gst-libs/gst/fft/gstfft.h
Sebastian Dröge 9022ca9d1b Add libgstfft, a FFT library based on Kiss FFT which is
Original commit message from CVS:
Reviewed by:  Stefan Kost  <ensonic@users.sf.net>
* configure.ac:
* gst-libs/gst/Makefile.am:
* gst-libs/gst/fft/Makefile.am:
* gst-libs/gst/fft/_kiss_fft_guts_f32.h:
* gst-libs/gst/fft/_kiss_fft_guts_f64.h:
* gst-libs/gst/fft/_kiss_fft_guts_s16.h:
* gst-libs/gst/fft/_kiss_fft_guts_s32.h:
* gst-libs/gst/fft/gstfft.c: (gst_fft_next_fast_length):
* gst-libs/gst/fft/gstfft.h:
* gst-libs/gst/fft/gstfftf32.c: (gst_fft_f32_new),
(gst_fft_f32_fft), (gst_fft_f32_inverse_fft), (gst_fft_f32_free),
(gst_fft_f32_window), (gst_fft_f32_magnitude), (gst_fft_f32_phase):
* gst-libs/gst/fft/gstfftf32.h:
* gst-libs/gst/fft/gstfftf64.c: (gst_fft_f64_new),
(gst_fft_f64_fft), (gst_fft_f64_inverse_fft), (gst_fft_f64_free),
(gst_fft_f64_window), (gst_fft_f64_magnitude), (gst_fft_f64_phase):
* gst-libs/gst/fft/gstfftf64.h:
* gst-libs/gst/fft/gstffts16.c: (gst_fft_s16_new),
(gst_fft_s16_fft), (gst_fft_s16_inverse_fft), (gst_fft_s16_free),
(gst_fft_s16_window), (gst_fft_s16_magnitude), (gst_fft_s16_phase):
* gst-libs/gst/fft/gstffts16.h:
* gst-libs/gst/fft/gstffts32.c: (gst_fft_s32_new),
(gst_fft_s32_fft), (gst_fft_s32_inverse_fft), (gst_fft_s32_free),
(gst_fft_s32_window), (gst_fft_s32_magnitude), (gst_fft_s32_phase):
* gst-libs/gst/fft/gstffts32.h:
* gst-libs/gst/fft/kiss_fft_f32.c: (kf_bfly2), (kf_bfly4),
(kf_bfly3), (kf_bfly5), (kf_bfly_generic), (kf_work), (kf_factor),
(kiss_fft_f32_alloc), (kiss_fft_f32_stride), (kiss_fft_f32),
(kiss_fft_f32_cleanup), (kiss_fft_f32_next_fast_size):
* gst-libs/gst/fft/kiss_fft_f32.h:
* gst-libs/gst/fft/kiss_fft_f64.c: (kf_bfly2), (kf_bfly4),
(kf_bfly3), (kf_bfly5), (kf_bfly_generic), (kf_work), (kf_factor),
(kiss_fft_f64_alloc), (kiss_fft_f64_stride), (kiss_fft_f64),
(kiss_fft_f64_cleanup), (kiss_fft_f64_next_fast_size):
* gst-libs/gst/fft/kiss_fft_f64.h:
* gst-libs/gst/fft/kiss_fft_s16.c: (kf_bfly2), (kf_bfly4),
(kf_bfly3), (kf_bfly5), (kf_bfly_generic), (kf_work), (kf_factor),
(kiss_fft_s16_alloc), (kiss_fft_s16_stride), (kiss_fft_s16),
(kiss_fft_s16_cleanup), (kiss_fft_s16_next_fast_size):
* gst-libs/gst/fft/kiss_fft_s16.h:
* gst-libs/gst/fft/kiss_fft_s32.c: (kf_bfly2), (kf_bfly4),
(kf_bfly3), (kf_bfly5), (kf_bfly_generic), (kf_work), (kf_factor),
(kiss_fft_s32_alloc), (kiss_fft_s32_stride), (kiss_fft_s32),
(kiss_fft_s32_cleanup), (kiss_fft_s32_next_fast_size):
* gst-libs/gst/fft/kiss_fft_s32.h:
* gst-libs/gst/fft/kiss_fftr_f32.c: (kiss_fftr_f32_alloc),
(kiss_fftr_f32), (kiss_fftri_f32):
* gst-libs/gst/fft/kiss_fftr_f32.h:
* gst-libs/gst/fft/kiss_fftr_f64.c: (kiss_fftr_f64_alloc),
(kiss_fftr_f64), (kiss_fftri_f64):
* gst-libs/gst/fft/kiss_fftr_f64.h:
* gst-libs/gst/fft/kiss_fftr_s16.c: (kiss_fftr_s16_alloc),
(kiss_fftr_s16), (kiss_fftri_s16):
* gst-libs/gst/fft/kiss_fftr_s16.h:
* gst-libs/gst/fft/kiss_fftr_s32.c: (kiss_fftr_s32_alloc),
(kiss_fftr_s32), (kiss_fftri_s32):
* gst-libs/gst/fft/kiss_fftr_s32.h:
* gst-libs/gst/fft/kiss_version:
* pkgconfig/gstreamer-plugins-base-uninstalled.pc.in:
* pkgconfig/gstreamer-plugins-base.pc.in:
Add libgstfft, a FFT library based on Kiss FFT which is
BSD licensed. Supported sample formats are int16, int32,
float and double. For those formats a real FFT and IFFT
can be done, different windowing functions can be applied
and functions for extracting the magnitude and phase exist.
Fixes #468619.
* docs/libs/Makefile.am:
* docs/libs/gst-plugins-base-libs-docs.sgml:
* docs/libs/gst-plugins-base-libs-sections.txt:
Integrate libgstfft into the docs.
* tests/check/Makefile.am:
* tests/check/libs/fft.c: (GST_START_TEST), (fft_suite), (main):
Add unit tests for libgstfft, currently only testing the FFT.
Unit tests for IFFT will follow soon.
2007-09-06 07:00:36 +00:00

49 lines
1.5 KiB
C

/* GStreamer
* Copyright (C) <2007> Sebastian Dröge <slomo@circular-chaos.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <glib.h>
#include <math.h>
#ifndef __GST_FFT_H__
#define __GST_FFT_H__
/**
* GstFFTWindow:
* @GST_FFT_WINDOW_RECTANGULAR: Rectangular window
* @GST_FFT_WINDOW_HAMMING: Hamming window
* @GST_FFT_WINDOW_HANN: Hann (sometimes also called Hanning) window
* @GST_FFT_WINDOW_BARTLETT: Bartlett window
* @GST_FFT_WINDOW_BLACKMAN: Blackman window
*
* The various window functions available.
*/
typedef enum
{
GST_FFT_WINDOW_RECTANGULAR,
GST_FFT_WINDOW_HAMMING,
GST_FFT_WINDOW_HANN,
GST_FFT_WINDOW_BARTLETT,
GST_FFT_WINDOW_BLACKMAN
} GstFFTWindow;
/* Functions */
gint gst_fft_next_fast_length (gint n);
#endif /* __GST_FFT_H__ */