diff options
Diffstat (limited to 'package/fonera-mp3/src/lib/mp3_file.c')
| -rw-r--r-- | package/fonera-mp3/src/lib/mp3_file.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/package/fonera-mp3/src/lib/mp3_file.c b/package/fonera-mp3/src/lib/mp3_file.c new file mode 100644 index 0000000..2dbed0f --- /dev/null +++ b/package/fonera-mp3/src/lib/mp3_file.c @@ -0,0 +1,191 @@ +/* +* 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; +}; |