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swr: use SIMD for dithering 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-09 02:05:35 +01:00
parent 57bdd67646
commit f3c9d8d41b
1 changed files with 13 additions and 2 deletions
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13
libswresample/swresample.c
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@ -651,9 +651,20 @@ static int swr_convert_internal(struct SwrContext *s, AudioData *out, int out_co
if(s->dither_pos + out_count > s->dither.count)
s->dither_pos = 0;
if (s->mix_2_1_simd) {
int len1= out_count&~15;
int off = len1 * preout->bps;
if(len1)
for(ch=0; ch<preout->ch_count; ch++)
s->mix_2_1_simd(preout->ch[ch], preout->ch[ch], s->dither.ch[ch] + s->dither.bps * s->dither_pos, s->native_one, 0, 0, len1);
if(out_count != len1)
for(ch=0; ch<preout->ch_count; ch++)
s->mix_2_1_f(preout->ch[ch] + off, preout->ch[ch] + off, s->dither.ch[ch] + s->dither.bps * s->dither_pos + off + len1, s->native_one, 0, 0, out_count - len1);
} else {
for(ch=0; ch<preout->ch_count; ch++)
s->mix_2_1_f(preout->ch[ch], preout->ch[ch], s->dither.ch[ch] + s->dither.bps * s->dither_pos, s->native_one, 0, 0, out_count);
}
s->dither_pos += out_count;
}
//FIXME packed doesnt need more than 1 chan here!