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