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swr: add mix8to2 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-08 22:12:00 +02:00
parent b0348158a0
commit e016e3c9d7
1 changed files with 17 additions and 0 deletions
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17
libswresample/rematrix_template.c
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@ -45,6 +45,16 @@ static void RENAME(mix6to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, int
}
}
static void RENAME(mix8to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, int len){
int i;
for(i=0; i<len; i++) {
INTER t = in[2][i]*coeffp[0*8+2] + in[3][i]*coeffp[0*8+3];
out[0][i] = R(t + in[0][i]*coeffp[0*8+0] + in[4][i]*coeffp[0*8+4] + in[6][i]*coeffp[0*8+6]);
out[1][i] = R(t + in[1][i]*coeffp[1*8+1] + in[5][i]*coeffp[1*8+5] + in[7][i]*coeffp[1*8+7]);
}
}
static mix_any_func_type *RENAME(get_mix_any_func)(SwrContext *s){
if( s->out_ch_layout == AV_CH_LAYOUT_STEREO && (s->in_ch_layout == AV_CH_LAYOUT_5POINT1 || s->in_ch_layout == AV_CH_LAYOUT_5POINT1_BACK)
&& s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
@ -52,5 +62,12 @@ static mix_any_func_type *RENAME(get_mix_any_func)(SwrContext *s){
)
return RENAME(mix6to2);
if( s->out_ch_layout == AV_CH_LAYOUT_STEREO && s->in_ch_layout == AV_CH_LAYOUT_7POINT1
&& s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
&& !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
&& !s->matrix[0][7] && !s->matrix[1][6]
)
return RENAME(mix8to2);
return NULL;
}