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Code Issues Releases Activity

Add comments to do_hybrid_window()

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Originally committed as revision 14359 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-07-24 03:28:42 +00:00
parent 0f72a2b7d3
commit 475d0e1464
1 changed files with 15 additions and 1 deletions
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16
libavcodec/ra288.c
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@ -137,6 +137,20 @@ static void prodsum(float *tgt, const float *src, int len, int n)
}
/**
* Hybrid window filtering. See blocks 36 and 49 of the G.728 specification.
*
* @param order the order of the filter
* @param n the length of the input
* @param non_rec the number of non recursive samples
* @param out the filter output
* @param in pointer to the input of the filter
* @param hist pointer to the input history of the filter. It is updated by
* this function.
* @param out pointer to the non recursive part of the output
* @param out2 pointer to the recursive part of the output
* @param window pointer to the windowing function table
*/
static void do_hybrid_window(int order, int n, int non_rec, const float *in,
float *out, float *hist, float *out2,
const float *window)
@ -146,7 +160,7 @@ static void do_hybrid_window(int order, int n, int non_rec, const float *in,
float buffer2[37];
float work[111];
/* rotate and multiply */
/* update history */
memmove(hist , hist + n, (order + non_rec)*sizeof(*hist));
memcpy (hist + order + non_rec, in , n *sizeof(*hist));