Make the Kaiser-Bessel window generator a common function

Patch by Robert Swain, robert d swain a gmail d com

Originally committed as revision 11514 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 6 insertions, 0 deletions

diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index d541fe0abd..da4c3a9089 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -645,6 +645,12 @@ typedef struct MDCTContext {
     FFTContext fft;
 } MDCTContext;
 
+/**
+ * Generate a Kaiser-Bessel Derived Window.
+ * @param   window  pointer to half window
+ */
+void ff_kbd_window_init(float *window);
+
 int ff_mdct_init(MDCTContext *s, int nbits, int inverse);
 void ff_imdct_calc(MDCTContext *s, FFTSample *output,
                 const FFTSample *input, FFTSample *tmp);