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/*
* Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
*
* This file is part of libswresample
*
* libswresample is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libswresample is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with libswresample; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
typedef void (RENAME(mix_any_func_type))(SAMPLE **out, const SAMPLE **in1, COEFF *coeffp, int len);
static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, COEFF *coeffp, int index1, int index2, int len){
int i;
COEFF coeff1 = coeffp[index1];
COEFF coeff2 = coeffp[index2];
for(i=0; i<len; i++)
out[i] = R(coeff1*in1[i] + coeff2*in2[i]);
}
static void RENAME(copy)(SAMPLE *out, const SAMPLE *in, COEFF *coeffp, int index, int len){
int i;
COEFF coeff = coeffp[index];
for(i=0; i<len; i++)
out[i] = R(coeff*in[i]);
}
static void RENAME(mix6to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, int len){
int i;
for(i=0; i<len; i++) {
INTER t = in[2][i]*coeffp[0*6+2] + in[3][i]*coeffp[0*6+3];
out[0][i] = R(t + in[0][i]*coeffp[0*6+0] + in[4][i]*coeffp[0*6+4]);
out[1][i] = R(t + in[1][i]*coeffp[1*6+1] + in[5][i]*coeffp[1*6+5]);
}
}
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 RENAME(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]
&& !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
)
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;
}
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