2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2007 Richard Kettlewell
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.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
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, MA 02111-1307
26 #include <sys/types.h>
33 #include <vorbis/vorbisfile.h>
35 #include <FLAC/file_decoder.h>
42 static void *mmap_file(const char *path, size_t *lengthp) {
47 if((fd = open(path, O_RDONLY)) < 0) {
48 disorder_error(errno, "error opening %s", path);
51 if(fstat(fd, &sb) < 0) {
52 disorder_error(errno, "error calling stat on %s", path);
55 if(sb.st_size == 0) /* can't map 0-length files */
57 if((base = mmap(0, sb.st_size, PROT_READ,
58 MAP_SHARED, fd, 0)) == (void *)-1) {
59 disorder_error(errno, "error calling mmap on %s", path);
62 *lengthp = sb.st_size;
70 static long tl_mp3(const char *path) {
75 if(!(base = mmap_file(path, &length))) return -1;
76 b.duration = mad_timer_zero;
77 scan_mp3(base, length, &b);
79 return b.duration.seconds + !!b.duration.fraction;
82 static long tl_ogg(const char *path) {
88 if(!(fp = fopen(path, "rb"))) goto error;
89 if(ov_open(fp, &vf, 0, 0)) goto error;
91 length = ov_time_total(&vf, -1);
99 static long tl_wav(const char *path) {
101 int err, sample_frame_size;
104 if((err = wav_init(f, path))) {
105 disorder_error(err, "error opening %s", path);
108 sample_frame_size = (f->bits + 7) / 8 * f->channels;
109 if(sample_frame_size) {
110 const long long n_samples = f->datasize / sample_frame_size;
111 duration = (n_samples + f->rate - 1) / f->rate;
118 /* libFLAC's "simplified" interface is rather heavyweight... */
125 static void flac_metadata(const FLAC__FileDecoder attribute((unused)) *decoder,
126 const FLAC__StreamMetadata *metadata,
128 struct flac_state *const state = client_data;
129 const FLAC__StreamMetadata_StreamInfo *const stream_info
130 = &metadata->data.stream_info;
132 if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO)
133 /* FLAC uses 0 to mean unknown and conveniently so do we */
134 state->duration = (stream_info->total_samples
135 + stream_info->sample_rate - 1)
136 / stream_info->sample_rate;
139 static void flac_error(const FLAC__FileDecoder attribute((unused)) *decoder,
140 FLAC__StreamDecoderErrorStatus status,
142 const struct flac_state *const state = client_data;
144 disorder_error(0, "error decoding %s: %s", state->path,
145 FLAC__StreamDecoderErrorStatusString[status]);
148 static FLAC__StreamDecoderWriteStatus flac_write
149 (const FLAC__FileDecoder attribute((unused)) *decoder,
150 const FLAC__Frame attribute((unused)) *frame,
151 const FLAC__int32 attribute((unused)) *const buffer_[],
152 void attribute((unused)) *client_data) {
153 const struct flac_state *const state = client_data;
155 if(state->duration >= 0)
156 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
158 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
161 static long tl_flac(const char *path) {
162 FLAC__FileDecoder *fd = 0;
163 FLAC__FileDecoderState fs;
164 struct flac_state state[1];
166 state->duration = -1; /* error */
168 if(!(fd = FLAC__file_decoder_new())) {
169 disorder_error(0, "FLAC__file_decoder_new failed");
172 if(!(FLAC__file_decoder_set_filename(fd, path))) {
173 disorder_error(0, "FLAC__file_set_filename failed");
176 FLAC__file_decoder_set_metadata_callback(fd, flac_metadata);
177 FLAC__file_decoder_set_error_callback(fd, flac_error);
178 FLAC__file_decoder_set_write_callback(fd, flac_write);
179 FLAC__file_decoder_set_client_data(fd, state);
180 if((fs = FLAC__file_decoder_init(fd))) {
181 disorder_error(0, "FLAC__file_decoder_init: %s",
182 FLAC__FileDecoderStateString[fs]);
185 FLAC__file_decoder_process_until_end_of_metadata(fd);
188 FLAC__file_decoder_delete(fd);
189 return state->duration;
192 static const struct {
194 long (*fn)(const char *path);
196 { ".FLAC", tl_flac },
200 { ".flac", tl_flac },
205 #define N_FILE_FORMATS (int)(sizeof file_formats / sizeof *file_formats)
207 long disorder_tracklength(const char attribute((unused)) *track,
209 const char *ext = strrchr(path, '.');
210 int l, r, m = 0, c = 0; /* quieten compiler */
214 r = N_FILE_FORMATS - 1;
215 while(l <= r && (c = strcmp(ext, file_formats[m = (l + r) / 2].ext)))
221 return file_formats[m].fn(path);