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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audioin.h
*
* Fri Apr 8 15:37:21 CEST 2011
* Copyright 2011 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of libaudioin.
*
* libaudioin is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libaudioin 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libaudioin; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "audioin.h"
int main(int argc, char *argv[])
{
int err = 0;
if(argc < 4) {
printf("Usage %s samplerate num_channels output_file\n", argv[0]);
return 1;
}
int samplerate = atoi(argv[1]);
int channels = atoi(argv[2]);
char *fname = argv[3];
struct ai_t *ai = ai_init(&err, "default", "Capture", samplerate, channels);
if(ai == NULL || err) printf("Error: %d\n", err);
if(!ai) {
printf("Trying alternative mixer interface (not running on an InterCom)\n");
//ai = ai_init(&err, "default", "H/W Multi", samplerate, channels);
ai = ai_init(&err, "default", "Capture", samplerate, channels);
if(ai == NULL || err) printf("Error: %d\n", err);
}
/** Chip: IDT 92HD83C1C5
Simple mixer control 'Master',0
Simple mixer control 'Headphone',0
Simple mixer control 'Speaker',0
Simple mixer control 'Front',0
Simple mixer control 'Front Mic Jack Mode',0
Simple mixer control 'Line',0
Simple mixer control 'Line Jack Mode',0
Simple mixer control 'Line',1
Simple mixer control 'Mic',0
Simple mixer control 'IEC958',0
Simple mixer control 'IEC958 Default PCM',0
Simple mixer control 'Capture',0
Simple mixer control 'Capture',1
Simple mixer control 'Input Source',0
Simple mixer control 'Input Source',1
Simple mixer control 'Internal Mic',0
**/
/** Chip: Realtek ALC662 rev1
Simple mixer control 'Master',0
Simple mixer control 'Headphone',0
Simple mixer control 'Front',0
Simple mixer control 'Front Mic',0
Simple mixer control 'Front Mic Boost',0
Simple mixer control 'Surround',0
Simple mixer control 'Center',0
Simple mixer control 'LFE',0
Simple mixer control 'Line',0
Simple mixer control 'IEC958',0
Simple mixer control 'IEC958 Default PCM',0
Simple mixer control 'Capture',0
Simple mixer control 'Capture',1
Simple mixer control 'Auto-Mute Mode',0
Simple mixer control 'Input Source',0
Simple mixer control 'Input Source',1
Simple mixer control 'Rear Mic',0
Simple mixer control 'Rear Mic Boost',0
**/
// 'Capture' record enabled, Input Source: 'Line'
ai_set_mixer_level(&err, ai, 0, 1.0);
ai_set_mixer_level(&err, ai, 1, 1.0);
short pcm[4096 * 10];
FILE *fp = fopen(fname, "w");
if(!fp) {
printf("Could not write %s\n", fname);
return 1;
}
for(size_t i = 0; i < 500; i++) {
memset(pcm, 0, sizeof(pcm));
int r = ai_read(&err, ai, pcm, sizeof(pcm));
if(r < 0 || err) printf("Error: %d\n", err);
// for(int j = 0; j < 20; j++) pcm[j] = 0;
int bufsz = r / (sizeof(short) * channels) ;
int offset = 160 / (1024 / bufsz);
int len = 16;
short start[] = {
pcm[ (bufsz - offset - 2) * 2],
pcm[ (bufsz - offset - 2) * 2 + 1]
};
short stop[] = {
pcm[ (bufsz - offset + len + 1) * 2],
pcm[ (bufsz - offset + len + 1) * 2 + 1]
};
for(int j = 0; j < len; j++) {
float d = (float)j / (float)len;
pcm[(bufsz - offset + j - 1) * 2] = start[0] * (1 - d) + stop[0] * d;
pcm[(bufsz - offset + j - 1) * 2 + 1] = start[1] * (1 - d) + stop[1] * d;
}
/*
short m = 32000;
pcm[(bufsz - offset) * 2] = m;
pcm[(bufsz - offset) * 2 + 1] = m;
pcm[(bufsz - offset + len) * 2] = m;
pcm[(bufsz - offset + len) * 2 + 1] = m;
*/
if(fwrite(pcm, r, 1, fp)) {}
}
fclose(fp);
ai_close(&err, ai);
return 0;
}
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