virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

Simplify stereo rematrixing by only using one temporary variable. It is also

Browse Source 
about 1.8% faster on my system.

Originally committed as revision 20090 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2009-09-30 01:25:04 +00:00
parent 16c91d2b23
commit 2ed4439658
1 changed files with 3 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
libavcodec/ac3dec.c
View File

@ -604,7 +604,6 @@ static void do_rematrixing(AC3DecodeContext *s)
{
int bnd, i;
int end, bndend;
int tmp0, tmp1;
end = FFMIN(s->end_freq[1], s->end_freq[2]);
@ -613,10 +612,9 @@ static void do_rematrixing(AC3DecodeContext *s)
if(s->rematrixing_flags[bnd]) {
bndend = FFMIN(end, ff_ac3_rematrix_band_tab[bnd+1]);
for(; i<bndend; i++) {
tmp0 = s->fixed_coeffs[1][i];
tmp1 = s->fixed_coeffs[2][i];
s->fixed_coeffs[1][i] = tmp0 + tmp1;
s->fixed_coeffs[2][i] = tmp0 - tmp1;
int tmp0 = s->fixed_coeffs[1][i];
s->fixed_coeffs[1][i] -= s->fixed_coeffs[2][i];
s->fixed_coeffs[2][i] = tmp0 - s->fixed_coeffs[2][i];
}
}
}