2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2007, 2011 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 3 of the License, or
8 * (at your option) any later version.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file plugins/tracklength-flac.c
19 * @brief Compute track lengths for FLAC files
21 #include "tracklength.h"
22 #include <FLAC/stream_decoder.h>
24 /* libFLAC's "simplified" interface is rather heavyweight... */
26 /** @brief State used when computing FLAC file length */
28 /** @brief Duration or -1 */
31 /** @brief File being analyzed */
35 static void flac_metadata(const FLAC__StreamDecoder
attribute((unused
)) *decoder
,
36 const FLAC__StreamMetadata
*metadata
,
38 struct flac_state
*const state
= client_data
;
39 const FLAC__StreamMetadata_StreamInfo
*const stream_info
40 = &metadata
->data
.stream_info
;
42 if(metadata
->type
== FLAC__METADATA_TYPE_STREAMINFO
)
43 /* FLAC uses 0 to mean unknown and conveniently so do we */
44 state
->duration
= (stream_info
->total_samples
45 + stream_info
->sample_rate
- 1)
46 / stream_info
->sample_rate
;
49 static void flac_error(const FLAC__StreamDecoder
attribute((unused
)) *decoder
,
50 FLAC__StreamDecoderErrorStatus status
,
52 const struct flac_state
*const state
= client_data
;
54 disorder_error(0, "error decoding %s: %s", state
->path
,
55 FLAC__StreamDecoderErrorStatusString
[status
]);
58 static FLAC__StreamDecoderWriteStatus flac_write
59 (const FLAC__StreamDecoder
attribute((unused
)) *decoder
,
60 const FLAC__Frame
attribute((unused
)) *frame
,
61 const FLAC__int32
attribute((unused
)) *const buffer_
[],
62 void attribute((unused
)) *client_data
) {
63 const struct flac_state
*const state
= client_data
;
65 if(state
->duration
>= 0)
66 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT
;
68 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE
;
71 long tl_flac(const char *path
) {
72 FLAC__StreamDecoder
*sd
= 0;
73 FLAC__StreamDecoderInitStatus is
;
74 struct flac_state state
[1];
76 state
->duration
= -1; /* error */
78 if(!(sd
= FLAC__stream_decoder_new())) {
79 disorder_error(0, "FLAC__stream_decoder_new failed");
82 if((is
= FLAC__stream_decoder_init_file(sd
, path
, flac_write
, flac_metadata
,
83 flac_error
, state
))) {
84 disorder_error(0, "FLAC__stream_decoder_init_file %s: %s",
85 path
, FLAC__StreamDecoderInitStatusString
[is
]);
88 FLAC__stream_decoder_process_until_end_of_metadata(sd
);
91 FLAC__stream_decoder_delete(sd
);
92 return state
->duration
;