From 9146e4d61c9de8fb86a7a9837705a0ad48fc547d Mon Sep 17 00:00:00 2001
From: Robert Swain <robert.swain@gmail.com>
Date: Sun, 22 Jun 2008 15:12:27 +0000
Subject: Add generic ff_sine_window_init function and implement in codecs
 appropriately

Originally committed as revision 13888 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mdct.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'libavcodec/mdct.c')

diff --git a/libavcodec/mdct.c b/libavcodec/mdct.c
index c51f809714..07eef2b3d4 100644
--- a/libavcodec/mdct.c
+++ b/libavcodec/mdct.c
@@ -48,6 +48,13 @@ void ff_kbd_window_init(float *window, float alpha, int n)
        window[i] = sqrt(local_window[i] / sum);
 }
 
+// Generate a sine window.
+void ff_sine_window_init(float *window, int n) {
+    int i;
+    for(i = 0; i < n; i++)
+        window[i] = sin((i + 0.5) / (2 * n) * M_PI);
+}
+
 /**
  * init MDCT or IMDCT computation.
  */
-- 
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