/* * Copyright (c) 2017 Paul B Mahol * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #include <stdio.h> #include <mysofa.h> int main(int argc, char **argv) { struct MYSOFA_HRTF *hrtf; int sample_rate; int err, i, j; if (argc < 3) { printf("usage: %s input_SOFA_file output_directory\n", argv[0]); return 1; } hrtf = mysofa_load(argv[1], &err); if (!hrtf || err) { printf("invalid input SOFA file: %s\n", argv[1]); return 1; } if (hrtf->DataSamplingRate.elements != 1) goto fail; sample_rate = hrtf->DataSamplingRate.values[0]; err = mkdir(argv[2], 0744); if (err) goto fail; err = chdir(argv[2]); if (err) goto fail; for (i = 0; i < hrtf->M; i++) { FILE *file; int bps = 32; int blkalign = 8; int bytespersec = blkalign * sample_rate; char filename[1024]; int azi = hrtf->SourcePosition.values[i * 3]; int ele = hrtf->SourcePosition.values[i * 3 + 1]; int dis = hrtf->SourcePosition.values[i * 3 + 2]; int size = 8 * hrtf->N; int offset = i * 2 * hrtf->N; snprintf(filename, sizeof(filename), "azi_%d_ele_%d_dis_%d.wav", azi, ele, dis); file = fopen(filename, "w+"); fwrite("RIFF", 4, 1, file); fwrite("\xFF\xFF\xFF\xFF", 4, 1, file); fwrite("WAVE", 4, 1, file); fwrite("fmt ", 4, 1, file); fwrite("\x10\x00\00\00", 4, 1, file); fwrite("\x03\x00", 2, 1, file); fwrite("\x02\x00", 2, 1, file); fwrite(&sample_rate, 4, 1, file); fwrite(&bytespersec, 4, 1, file); fwrite(&blkalign, 2, 1, file); fwrite(&bps, 2, 1, file); fwrite("data", 4, 1, file); fwrite(&size, 4, 1, file); for (j = 0; j < hrtf->N; j++) { float l, r; l = hrtf->DataIR.values[offset + j]; r = hrtf->DataIR.values[offset + j + hrtf->N]; fwrite(&l, 4, 1, file); fwrite(&r, 4, 1, file); } fclose(file); } fail: mysofa_free(hrtf); return 0; }