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    Add libgstfft, a FFT library based on Kiss FFT which is · 9022ca9d
    Sebastian Dröge authored
    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.
    9022ca9d