From 542c064d1bae296fc55c3058f3eda72df7879d4d Mon Sep 17 00:00:00 2001 From: Vladimir Voroshilov Date: Sun, 11 May 2008 10:07:11 +0000 Subject: Update comment to version, negotiated with Diego, and fix missing period (not latest revision of patch was wrongly committed). Originally committed as revision 13113 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/acelp_filters.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'libavcodec/acelp_filters.c') diff --git a/libavcodec/acelp_filters.c b/libavcodec/acelp_filters.c index b98c6f741e..7e33a674f1 100644 --- a/libavcodec/acelp_filters.c +++ b/libavcodec/acelp_filters.c @@ -37,13 +37,12 @@ void ff_acelp_convolve_circ( memset(fc_out, 0, subframe_size * sizeof(int16_t)); - /* Since there are few pulses over entire subframe (i.e. almost all - fc_in[i] are zero, in case of G.729D the buffer contains two non-zero - samples before the call to ff_acelp_enhance_harmonics, and (due to - pitch_delay bounded to [20; 143]) a maximum four non-zero samples - for a total of 40 after the call to it), it is faster to swap two loops - and process non-zero samples only. This will reduce the number of - multiplications from 40*40 to 4*40 for G.729D */ + /* Since there are few pulses over an entire subframe (i.e. almost + all fc_in[i] are zero) it is faster to swap two loops and process + non-zero samples only. In the case of G.729D the buffer contains + two non-zero samples before the call to ff_acelp_enhance_harmonics + and, due to pitch_delay being bounded by [20; 143], a maximum + of four non-zero samples for a total of 40 after the call. */ for(i=0; i