yading@11: /*
yading@11:  * Copyright (C) 2011-2012 Michael Niedermayer (michaelni@gmx.at)
yading@11:  *
yading@11:  * This file is part of libswresample
yading@11:  *
yading@11:  * libswresample is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * libswresample is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with libswresample; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #if defined(TEMPLATE_REMATRIX_FLT)
yading@11: #    define R(x) x
yading@11: #    define SAMPLE float
yading@11: #    define COEFF float
yading@11: #    define INTER float
yading@11: #    define RENAME(x) x ## _float
yading@11: #elif defined(TEMPLATE_REMATRIX_DBL)
yading@11: #    define R(x) x
yading@11: #    define SAMPLE double
yading@11: #    define COEFF double
yading@11: #    define INTER double
yading@11: #    define RENAME(x) x ## _double
yading@11: #elif defined(TEMPLATE_REMATRIX_S16)
yading@11: #    define R(x) (((x) + 16384)>>15)
yading@11: #    define SAMPLE int16_t
yading@11: #    define COEFF int
yading@11: #    define INTER int
yading@11: #    define RENAME(x) x ## _s16
yading@11: #endif
yading@11: 
yading@11: typedef void (RENAME(mix_any_func_type))(SAMPLE **out, const SAMPLE **in1, COEFF *coeffp, integer len);
yading@11: 
yading@11: static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, COEFF *coeffp, integer index1, integer index2, integer len){
yading@11:     int i;
yading@11:     COEFF coeff1 = coeffp[index1];
yading@11:     COEFF coeff2 = coeffp[index2];
yading@11: 
yading@11:     for(i=0; i<len; i++)
yading@11:         out[i] = R(coeff1*in1[i] + coeff2*in2[i]);
yading@11: }
yading@11: 
yading@11: static void RENAME(copy)(SAMPLE *out, const SAMPLE *in, COEFF *coeffp, integer index, integer len){
yading@11:     int i;
yading@11:     COEFF coeff = coeffp[index];
yading@11:     for(i=0; i<len; i++)
yading@11:         out[i] = R(coeff*in[i]);
yading@11: }
yading@11: 
yading@11: static void RENAME(mix6to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, integer len){
yading@11:     int i;
yading@11: 
yading@11:     for(i=0; i<len; i++) {
yading@11:         INTER t = in[2][i]*coeffp[0*6+2] + in[3][i]*coeffp[0*6+3];
yading@11:         out[0][i] = R(t + in[0][i]*coeffp[0*6+0] + in[4][i]*coeffp[0*6+4]);
yading@11:         out[1][i] = R(t + in[1][i]*coeffp[1*6+1] + in[5][i]*coeffp[1*6+5]);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void RENAME(mix8to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, integer len){
yading@11:     int i;
yading@11: 
yading@11:     for(i=0; i<len; i++) {
yading@11:         INTER t = in[2][i]*coeffp[0*8+2] + in[3][i]*coeffp[0*8+3];
yading@11:         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]);
yading@11:         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]);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static RENAME(mix_any_func_type) *RENAME(get_mix_any_func)(SwrContext *s){
yading@11:     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)
yading@11:        && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
yading@11:        && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
yading@11:     )
yading@11:         return RENAME(mix6to2);
yading@11: 
yading@11:     if(   s->out_ch_layout == AV_CH_LAYOUT_STEREO && s->in_ch_layout == AV_CH_LAYOUT_7POINT1
yading@11:        && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
yading@11:        && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
yading@11:        && !s->matrix[0][7] && !s->matrix[1][6]
yading@11:     )
yading@11:         return RENAME(mix8to2);
yading@11: 
yading@11:     return NULL;
yading@11: }
yading@11: 
yading@11: #undef R
yading@11: #undef SAMPLE
yading@11: #undef COEFF
yading@11: #undef INTER
yading@11: #undef RENAME