/* * Copyright (C) 2011-2012 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, integer len); static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, COEFF *coeffp, integer index1, integer index2, integer 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, integer index, integer 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, integer 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, integer 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; }