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/*
* FOXMP3
* Copyright (c) 2006 acmesystems.it - john@acmesystems.it
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
*
* Feedback, Bugs... info@acmesystems.it
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include "mp3.h"
#define MP3_PRE_BUFFER_COUNT ((128 * 1024) / MP3_CHUNK_SIZE)
typedef struct _MP3_FILE {
unsigned char filename[2048];
MP3_DATA mp3_data;
FILE *fd;
unsigned char file_end_found;
MP3_FILE_ID3 *id3;
} MP3_FILE;
static MP3_FILE mp3_file;
void mp3_load_id3(FILE *fp){
unsigned char *buf = malloc(1024);
mp3_file.id3->album[0] = '\0';
mp3_file.id3->artist[0] = '\0';
mp3_file.id3->track[0] = '\0';
fgets(buf, 1024, fp);
if( (buf[0] == 'I') &&
(buf[1] == 'D') &&
(buf[2] == '3')){
unsigned int id3_size;
unsigned int i;
unsigned int id3_version = buf[3];
id3_version <<= 8;
id3_version += buf[4];
id3_size = 0;
for(i = 0; i<4; i++){
id3_size += buf[5 + i];
id3_size <<= 7;
};
if(id3_version>>8 == 3){
unsigned int id3_pos = 10;
unsigned int id3_tag_size;
unsigned char tag_name[5];
unsigned char tag_data[257];
tag_name[4] = '\0';
tag_data[256] = '\0';
unsigned int count = 0;
while(count < 10){
strncpy(tag_name, &buf[id3_pos], 4);
id3_tag_size = buf[id3_pos + 4];
id3_tag_size <<= 8;
id3_tag_size = buf[id3_pos + 5];
id3_tag_size <<= 8;
id3_tag_size = buf[id3_pos + 6];
id3_tag_size <<= 8;
id3_tag_size = buf[id3_pos + 7];
if(id3_tag_size == 0){
break;
};
if(id3_tag_size > 256){
memcpy(&tag_data[0], &buf[id3_pos + 11] , 256);
} else {
memcpy(&tag_data[0], &buf[id3_pos + 11] ,
id3_tag_size -1);
tag_data[id3_tag_size-1] = '\0';
};
id3_pos += 10 + id3_tag_size;
if(strcmp(tag_name, "TPE1") == 0){
strncpy(mp3_file.id3->artist, tag_data, 255);
};
if(strcmp(tag_name, "TALB") == 0){
strncpy(mp3_file.id3->album, tag_data, 255);
};
if(strcmp(tag_name, "TIT2") == 0){
strncpy(mp3_file.id3->track, tag_data, 255);
};
if(id3_pos >= id3_size){
break;
};
count ++;
};
};
printf("ID3 tag found Version 2.%d.%d / size %d\n%s -- %s -- %s\n",
id3_version>>8,
id3_version&0xff,
id3_size,
mp3_file.id3->artist,
mp3_file.id3->album,
mp3_file.id3->track);
} else {
printf("No ID3 Tag was found\n");
};
free(buf);
};
int mp3_file_setup(unsigned char *filename, MP3_FILE_ID3 *id3){
unsigned int i;
mp3_file.id3 = id3;
mp3_file.file_end_found = 0;
strcpy(mp3_file.filename, filename);
mp3_file.fd = fopen(mp3_file.filename, "rb");
if(!mp3_file.fd){
mp3_file.fd = 0;
printf("error opening file %s\n", mp3_file.filename);
return MP3_ERROR;
};
printf("File %s opened Ok\n", mp3_file.filename);
printf("Reading id3 tag\n");
mp3_load_id3(mp3_file.fd);
fseek(mp3_file.fd, 0, SEEK_SET);
mp3_reset();
printf("Buffering MP3 Data\n");
mp3_file.mp3_data.state = MP3_BUFFERING;
for(i = 0; i < MP3_PRE_BUFFER_COUNT - 1; i++){
fread(mp3_file.mp3_data.mp3, MP3_CHUNK_SIZE, 1, mp3_file.fd);
mp3_file.mp3_data.state = MP3_PLAYING;
mp3_send_data_to_buffer(mp3_file.mp3_data);
};
printf("Starting to play file : %s\n", mp3_file.filename);
return MP3_OK;
};
int mp3_file_handle(void){
unsigned char transmit_success = 1;
if (!feof(mp3_file.fd)) {
fread(mp3_file.mp3_data.mp3, MP3_CHUNK_SIZE, 1, mp3_file.fd);
transmit_success = 0;
while(!transmit_success){
if(!mp3_send_data_to_buffer(mp3_file.mp3_data)){
usleep(1);
transmit_success = 0;
} else {
transmit_success = 1;
};
};
return MP3_OK;
} else {
if(!mp3_file.file_end_found){
mp3_file.mp3_data.state = MP3_BUFFER_FINISHED;
mp3_send_data_to_buffer(mp3_file.mp3_data);
printf("File end reached. Wait till kernel buffer has cleared.\n");
mp3_file.file_end_found = 1;
};
if(!mp3_buffer_finished()){
return MP3_OK;
} else {
return MP3_END;
};
};
};
int mp3_file_cleanup(void){
if(mp3_file.fd){
fclose(mp3_file.fd);
};
return MP3_OK;
};
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