Add generic ff_sine_window_init function and implement in codecs appropriately

Originally committed as revision 13888 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 7 insertions, 0 deletions

diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index cd9ae08211..0316a451b3 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -649,6 +649,13 @@ typedef struct MDCTContext {
  */
 void ff_kbd_window_init(float *window, float alpha, int n);
 
+/**
+ * Generate a sine window.
+ * @param   window  pointer to half window
+ * @param   n       size of half window
+ */
+void ff_sine_window_init(float *window, int n);
+
 int ff_mdct_init(MDCTContext *s, int nbits, int inverse);
 void ff_imdct_calc(MDCTContext *s, FFTSample *output,
                 const FFTSample *input, FFTSample *tmp);