package/fonera-mp3/src/lib/mp3_common.c

   1 /*
   2 * FOXMP3
   3 * Copyright (c) 2006 acmesystems.it - john@acmesystems.it
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
  18 *
  19 * Feedback, Bugs...  info@acmesystems.it
  20 *
  21 */
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/ioctl.h>
  27 #include <fcntl.h>
  28
  29 #include "mp3.h"
  30
  31 static int mp3_fd;
  32 static int mp3_frequency_val = CRYSTAL12288;
  33 unsigned int volume = 0x3030;
  34
  35 int mp3_open_port(unsigned char *port_name){
  36         int fd;
  37         if ((fd = open(port_name, O_RDWR)) < 0) {
  38                 printf("Error whilst opening %s\n", port_name);
  39                 return -1;
  40         }
  41         return fd;
  42 };
  43
  44 void mp3_set_frequency(unsigned int crystal_frequency){
  45         mp3_frequency_val = crystal_frequency;
  46 };
  47
  48 int mp3_init(void){
  49         mp3_fd = mp3_open_port("/dev/mp3");
  50         if(mp3_fd < 1){
  51                 return 0;
  52         };
  53         ioctl(mp3_fd, IOCTL_MP3_INIT, mp3_frequency_val);
  54         return 1;
  55 };
  56
  57 void mp3_shutdown(void){
  58         close(mp3_fd);
  59 };
  60
  61 void mp3_bass(unsigned char t_freq, unsigned char t_amp,
  62                 unsigned char b_freq, unsigned char b_amp){
  63         unsigned int val;
  64         if(t_amp > 0xf){
  65                 t_amp = 0xf;
  66         };
  67         if(b_amp > 0xf){
  68                 b_amp = 0xf;
  69         };
  70         val = t_amp;
  71         val <<= 4;
  72         val += t_freq;
  73         val <<= 4;
  74         val += b_amp;
  75         val <<= 4;
  76         val += b_freq;
  77         ioctl(mp3_fd, IOCTL_MP3_BASS, val);
  78 };
  79
  80 void mp3_reset(void){
  81         ioctl(mp3_fd, IOCTL_MP3_CLEARBUFFER, 0);
  82         ioctl(mp3_fd, IOCTL_MP3_RESET, mp3_frequency_val);
  83         ioctl(mp3_fd, IOCTL_MP3_SETVOLUME, volume);
  84 };
  85
  86 unsigned char mp3_send_data_to_buffer(MP3_DATA mp3_data){
  87         return write(mp3_fd, (void*)&mp3_data, sizeof(MP3_DATA));
  88 };
  89
  90 unsigned char mp3_play(void){
  91         return ioctl(mp3_fd, IOCTL_MP3_PLAY, 0);
  92 };
  93
  94 void mp3_stop(void){
  95         ioctl(mp3_fd, IOCTL_MP3_CLEARBUFFER, 0);
  96 };
  97
  98 void mp3_beep(unsigned char freq, unsigned int ms){
  99         MP3_BEEP mp3_beep_;
 100         mp3_beep_.freq = freq;
 101         mp3_beep_.ms = ms;
 102         ioctl(mp3_fd, IOCTL_MP3_BEEP, &mp3_beep_);
 103 };
 104
 105 void mp3_set_volume(unsigned char left, unsigned char right){
 106         volume = left;
 107         volume <<= 8;
 108         volume += right;
 109
 110         ioctl(mp3_fd, IOCTL_MP3_SETVOLUME, volume);
 111 };
 112
 113 unsigned char mp3_buffer_finished(void){
 114         return ioctl(mp3_fd, IOCTL_MP3_END_REACHED, 0);
 115 };
 116
 117 unsigned char mp3_get_audio_data(AUDIO_DATA *audio_data){
 118         return ioctl(mp3_fd, IOCTL_MP3_GETAUDIODATA, audio_data);
 119 };
 120
 121