1//========================================================================= 2// FILENAME : playlist.c 3// DESCRIPTION : Playlist 4//========================================================================= 5// Copyright (c) 2008- NETGEAR, Inc. All Rights Reserved. 6//========================================================================= 7 8/* 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program. If not, see <http://www.gnu.org/licenses/>. 21 */ 22 23#include <stdio.h> 24#include <string.h> 25#include <ctype.h> 26 27#include "misc.h" 28#include "tagutils.h" 29#include "textutils.h" 30#include "log.h" 31 32 33#define MAX_BUF 4096 34 35static FILE *fp = 0; 36static int _utf8bom = 0; 37static int _trackno; 38 39static int (*_next_track)(struct song_metadata*, struct stat*, char*, char*); 40static int _m3u_pls_next_track(struct song_metadata*, struct stat*, char*, char*); 41 42int 43start_plist(const char *path, struct song_metadata *psong, struct stat *stat, char *lang, char *type) 44{ 45 char *fname, *suffix; 46 47 _next_track = 0; 48 _utf8bom = 0; 49 _trackno = 0; 50 51 if(strcasecmp(type, "m3u") == 0) 52 _next_track = _m3u_pls_next_track; 53 else if(strcasecmp(type, "pls") == 0) 54 _next_track = _m3u_pls_next_track; 55 56 if(!_next_track) 57 { 58 DPRINTF(E_ERROR, L_SCANNER, "Unsupported playlist type <%s> (%s)\n", type, path); 59 return -1; 60 } 61 62 if(!(fp = fopen(path, "rb"))) 63 { 64 DPRINTF(E_ERROR, L_SCANNER, "Cannot open %s\n", path); 65 return -1; 66 } 67 68 if(!psong) 69 return 0; 70 71 memset((void*)psong, 0, sizeof(struct song_metadata)); 72 psong->is_plist = 1; 73 psong->path = strdup(path); 74 psong->type = type; 75 76 fname = strrchr(psong->path, '/'); 77 psong->basename = fname ? fname + 1 : psong->path; 78 79 psong->title = strdup(psong->basename); 80 suffix = strrchr(psong->title, '.'); 81 if(suffix) *suffix = '\0'; 82 83 if(stat) 84 { 85 if(!psong->time_modified) 86 psong->time_modified = stat->st_mtime; 87 psong->file_size = stat->st_size; 88 } 89 90 return 0; 91} 92 93int 94_m3u_pls_next_track(struct song_metadata *psong, struct stat *stat, char *lang, char *type) 95{ 96 char buf[MAX_BUF], *p; 97 int len; 98 99 memset((void*)psong, 0, sizeof(struct song_metadata)); 100 101 // read first line 102 p = fgets(buf, MAX_BUF, fp); 103 if(!p) 104 { 105 fclose(fp); 106 return 1; 107 } 108 109 if(strcasecmp(type, "m3u") == 0) 110 { 111 // check BOM 112 if(!_utf8bom && p[0] == '\xef' && p[1] == '\xbb' && p[2] == '\xbf') 113 { 114 _utf8bom = 1; 115 p += 3; 116 } 117 } 118 119 while(p) 120 { 121 while(isspace(*p)) p++; 122 123 if(!(*p) || *p == '#') 124 goto next_line; 125 126 if(!isprint(*p)) 127 { 128 DPRINTF(E_ERROR, L_SCANNER, "Playlist looks bad (unprintable characters)\n"); 129 fclose(fp); 130 return 2; 131 } 132 133 if(strcasecmp(type, "pls") == 0) 134 { 135 // verify that it's a valid pls playlist 136 if(!_trackno) 137 { 138 if(strncmp(p, "[playlist]", 10)) 139 break; 140 _trackno++; 141 goto next_line; 142 } 143 144 if(strncmp(p, "File", 4) != 0) 145 goto next_line; 146 147 psong->track = strtol(p+4, &p, 10); 148 if(!psong->track || !p++) 149 goto next_line; 150 _trackno = psong->track; 151 } 152 else if(strcasecmp(type, "m3u") == 0) 153 psong->track = ++_trackno; 154 155 len = strlen(p); 156 while(p[len-1] == '\r' || p[len-1] == '\n') 157 p[--len] = '\0'; 158 psong->path = strdup(p); 159 return 0; 160next_line: 161 p = fgets(buf, MAX_BUF, fp); 162 } 163 164 fclose(fp); 165 return 1; 166} 167 168int 169next_plist_track(struct song_metadata *psong, struct stat *stat, char *lang, char *type) 170{ 171 if(_next_track) 172 return _next_track(psong, stat, lang, type); 173 return -1; 174} 175