mirror of https://github.com/asterisk/asterisk
Adds the import tool for converting a HRIR database to hrirs.h ASTERISK-26292 Change-Id: I51eb31b54c23ffd9b544bdc6a09d20c112c8a547changes/54/4654/3
Dennis Guse
8 years ago
committed by
George Joseph
parent
0b5a17082b
commit
b58de2fab7
@ -0,0 +1,148 @@
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2016, Digium, Inc.
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*
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* Frank Haase <fra.haase@gmail.com>
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* Dennis Guse <dennis.guse@alumni.tu-berlin.de>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \file
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* Converts a Head Related Impulse Response (HRIR) database (a multi-channel wave) into a C header file.
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* HRIR for the left ear and HRIR for right ear have to be interleaved.
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* No further signal processing is applied (e.g., resampling).
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*
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* Info messages are printed to stderror and the generated header file to output.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sndfile.h>
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int main (int argc, char **argv)
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{
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char *hrir_filename;
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unsigned int binaural_index_start;
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unsigned int binaural_index_end;
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SNDFILE *hrir_file;
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SF_INFO hrir_info;
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float *hrir_data;
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unsigned int impulse_response_index_start;
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unsigned int impulse_response_index_end;
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int j;
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int ir_current;
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if(argc != 4) {
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puts("HRIR database to C header file converter.");
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puts("Usage: conf_bridge_binaural_hrir_importer HRIR.wav INDEX_START INDEX_END > OUTPUT.h");
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puts("Example: conf_bridge_binaural_hrir_importer hrirs.wav 0 180 > ../bridges/bridge_softmix/include/hrirs.h");
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return -1;
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}
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/* Parse arguments */
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hrir_filename = argv[1];
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binaural_index_start = atoi(argv[2]);
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binaural_index_end = atoi(argv[3]);
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/* Read HRIR database */
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hrir_file = sf_open(hrir_filename, SFM_READ, &hrir_info);
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if(hrir_file == NULL) {
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fprintf(stderr, "ERROR: Could not open HRIR database (%s).\n", hrir_filename);
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return -1;
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}
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fprintf(stderr, "INFO: Opened HRIR database (%s) with: number channels: %d; samplerate: %d; samples per channel: %ld\n", hrir_filename, hrir_info.channels, hrir_info.samplerate, hrir_info.frames);
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hrir_data = (float *)malloc(hrir_info.channels * hrir_info.frames * sizeof(float));
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if(hrir_data == NULL) {
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fprintf(stderr, "ERROR: Out of memory!");
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return -1;
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}
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/* Channels are interleaved */
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sf_read_float(hrir_file, hrir_data, hrir_info.channels * hrir_info.frames);
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sf_close(hrir_file);
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if(binaural_index_start >= binaural_index_end) {
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fprintf(stderr, "ERROR: INDEX_START (%d) must be smaller than INDEX_END (%d).", binaural_index_start, binaural_index_end);
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free(hrir_data);
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return -1;
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}
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if (binaural_index_end * 2 >= hrir_info.channels) {
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fprintf(stderr, "ERROR: END_INDEX (%d) is out of range for HRIR database (%s).\n", binaural_index_end, hrir_filename);
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free(hrir_data);
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return -1;
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}
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/* Convert indices */
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impulse_response_index_start = 2 * binaural_index_start;
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impulse_response_index_end = (binaural_index_end + 1) * 2;
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/* Write header */
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printf("//Used hrirs database: %s\n", hrir_filename);
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printf("//Start index in database: %d\n", impulse_response_index_start);
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printf("//End index in database: %d\n", impulse_response_index_end);
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printf("#define HRIRS_IMPULSE_LEN %ld\n", hrir_info.frames);
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printf("#define HRIRS_IMPULSE_SIZE %d\n", binaural_index_end - binaural_index_start + 1);
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printf("#define HRIRS_SAMPLE_RATE %d\n", hrir_info.samplerate);
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printf("float hrirs_left[HRIRS_IMPULSE_SIZE][HRIRS_IMPULSE_LEN] = {\n");
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for (ir_current = impulse_response_index_start; ir_current < impulse_response_index_end; ir_current += 2) {
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printf("{");
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for (j = 0; j < hrir_info.frames - 1; j++) {
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printf("%.16f,", hrir_data[ir_current * hrir_info.frames + j]);
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}
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/* Write last without trailing "," */
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printf("%.16f", hrir_data[ir_current * hrir_info.frames + hrir_info.frames - 1]);
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if (ir_current + 2 < impulse_response_index_end) {
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printf("},\n");
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} else {
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printf("}};");
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}
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}
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printf("\nfloat hrirs_right[HRIRS_IMPULSE_SIZE][HRIRS_IMPULSE_LEN] = {\n");
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for (ir_current = impulse_response_index_start + 1; ir_current < impulse_response_index_end + 1; ir_current += 2) {
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printf("{");
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for (j = 0; j < hrir_info.frames - 1; j++) {
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printf("%.16f,", hrir_data[ir_current * hrir_info.frames + j]);
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}
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/* Write last without trailing "," */
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printf("%.16f", hrir_data[ir_current * hrir_info.frames + hrir_info.frames - 1]);
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if (ir_current + 2 < impulse_response_index_end) {
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printf("},\n");
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} else {
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printf("}};");
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}
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}
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fprintf(stderr, "INFO: Successfully converted: imported %d impulse responses.\n", impulse_response_index_end - impulse_response_index_start);
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free(hrir_data);
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return 0;
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}
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