diff options
Diffstat (limited to 'libswresample/rematrix_template.c')
-rw-r--r-- | libswresample/rematrix_template.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libswresample/rematrix_template.c b/libswresample/rematrix_template.c new file mode 100644 index 0000000..627bf1f --- /dev/null +++ b/libswresample/rematrix_template.c @@ -0,0 +1,74 @@ +/* + * 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, 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; +} |