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Use math constant instead of hardcoded rounded value for sqrt(0.5).

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Patch by Christophe.Gisquet (gmail)

Originally committed as revision 24213 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Christophe Gisquet 2010-07-12 12:32:24 +00:00 committed by Benoit Fouet
parent bf55cf19ca
commit f2401c214d
1 changed files with 2 additions and 2 deletions
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libavcodec/dca.c
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@ -1403,8 +1403,8 @@ static int dca_decode_frame(AVCodecContext * avctx,
float* rt_chan = s->samples + s->channel_order_tab[s->xch_base_channel - 1] * 256;
int j;
for(j = 0; j < 256; ++j) {
lt_chan[j] -= (back_chan[j] - s->add_bias) * 0.707107f;
rt_chan[j] -= (back_chan[j] - s->add_bias) * 0.707107f;
lt_chan[j] -= (back_chan[j] - s->add_bias) * M_SQRT1_2;
rt_chan[j] -= (back_chan[j] - s->add_bias) * M_SQRT1_2;
}
}