fix leak of xmms config struct in init
[flac.git] / src / plugin_xmms / plugin.c
1 /* libxmms-flac - XMMS FLAC input plugin
2  * Copyright (C) 2000,2001,2002,2003  Josh Coalson
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  */
18
19 #include <pthread.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <stdio.h>
23 #include <glib.h>
24
25 #include <xmms/plugin.h>
26 #include <xmms/util.h>
27 #include <xmms/configfile.h>
28 #include <xmms/titlestring.h>
29
30 #ifdef HAVE_CONFIG_H
31 #include <config.h>
32 #endif
33
34 #ifdef HAVE_LANGINFO_CODESET
35 #include <langinfo.h>
36 #endif
37
38 #include "FLAC/all.h"
39 #include "plugin_common/all.h"
40 #include "share/grabbag.h"
41 #include "configure.h"
42 #include "wrap_id3.h"
43 #include "charset.h"
44
45 #ifdef min
46 #undef min
47 #endif
48 #define min(x,y) ((x)<(y)?(x):(y))
49
50 extern void FLAC_XMMS__file_info_box(char *filename);
51
52 typedef struct {
53         FLAC__bool abort_flag;
54         FLAC__bool is_playing;
55         FLAC__bool eof;
56         FLAC__bool play_thread_open; /* if true, is_playing must also be true */
57         unsigned total_samples;
58         unsigned bits_per_sample;
59         unsigned channels;
60         unsigned sample_rate;
61         unsigned length_in_msec;
62         gchar *title;
63         AFormat sample_format;
64         unsigned sample_format_bytes_per_sample;
65         int seek_to_in_sec;
66         FLAC__bool has_replaygain;
67         double replay_scale;
68         DitherContext dither_context;
69 } file_info_struct;
70
71 static void FLAC_XMMS__init();
72 static int  FLAC_XMMS__is_our_file(char *filename);
73 static void FLAC_XMMS__play_file(char *filename);
74 static void FLAC_XMMS__stop();
75 static void FLAC_XMMS__pause(short p);
76 static void FLAC_XMMS__seek(int time);
77 static int  FLAC_XMMS__get_time();
78 static void FLAC_XMMS__cleanup();
79 static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length);
80
81 static void *play_loop_(void *arg);
82 static FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder);
83 static void safe_decoder_finish_(FLAC__FileDecoder *decoder);
84 static void safe_decoder_delete_(FLAC__FileDecoder *decoder);
85 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
86 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
87 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
88
89 InputPlugin flac_ip =
90 {
91         NULL,
92         NULL,
93         "Reference FLAC Player v" VERSION,
94         FLAC_XMMS__init,
95         FLAC_XMMS__aboutbox,
96         FLAC_XMMS__configure,
97         FLAC_XMMS__is_our_file,
98         NULL,
99         FLAC_XMMS__play_file,
100         FLAC_XMMS__stop,
101         FLAC_XMMS__pause,
102         FLAC_XMMS__seek,
103         NULL,
104         FLAC_XMMS__get_time,
105         NULL,
106         NULL,
107         FLAC_XMMS__cleanup,
108         NULL,
109         NULL,
110         NULL,
111         NULL,
112         FLAC_XMMS__get_song_info,
113         FLAC_XMMS__file_info_box,
114         NULL
115 };
116
117 #define SAMPLES_PER_WRITE 512
118 #define SAMPLE_BUFFER_SIZE ((FLAC__MAX_BLOCK_SIZE + SAMPLES_PER_WRITE) * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8))
119 static FLAC__byte sample_buffer_[SAMPLE_BUFFER_SIZE];
120 static unsigned sample_buffer_first_, sample_buffer_last_;
121
122 static FLAC__FileDecoder *decoder_ = 0;
123 static file_info_struct file_info_;
124 static pthread_t decode_thread_;
125 static FLAC__bool audio_error_ = false;
126
127 #define BITRATE_HIST_SEGMENT_MSEC 500
128 /* 500ms * 50 = 25s should be enough */
129 #define BITRATE_HIST_SIZE 50
130 static unsigned bitrate_history_[BITRATE_HIST_SIZE];
131
132
133 InputPlugin *get_iplugin_info()
134 {
135         flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING);
136         return &flac_ip;
137 }
138
139 void FLAC_XMMS__init()
140 {
141         ConfigFile *cfg;
142
143         flac_cfg.title.tag_override = FALSE;
144         g_free(flac_cfg.title.tag_format);
145         flac_cfg.title.convert_char_set = FALSE;
146
147         cfg = xmms_cfg_open_default_file();
148
149         /* title */
150
151         xmms_cfg_read_boolean(cfg, "flac", "title.tag_override", &flac_cfg.title.tag_override);
152
153         if(!xmms_cfg_read_string(cfg, "flac", "title.tag_format", &flac_cfg.title.tag_format))
154                 flac_cfg.title.tag_format = g_strdup("%p - %t");
155
156         xmms_cfg_read_boolean(cfg, "flac", "title.convert_char_set", &flac_cfg.title.convert_char_set);
157
158         if(!xmms_cfg_read_string(cfg, "flac", "title.file_char_set", &flac_cfg.title.file_char_set))
159                 flac_cfg.title.file_char_set = FLAC_plugin__charset_get_current();
160
161         if(!xmms_cfg_read_string(cfg, "flac", "title.user_char_set", &flac_cfg.title.user_char_set))
162                 flac_cfg.title.user_char_set = FLAC_plugin__charset_get_current();
163
164         /* replaygain */
165
166         xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.enable", &flac_cfg.output.replaygain.enable);
167
168         xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.album_mode", &flac_cfg.output.replaygain.album_mode);
169
170         if(!xmms_cfg_read_int(cfg, "flac", "output.replaygain.preamp", &flac_cfg.output.replaygain.preamp))
171                 flac_cfg.output.replaygain.preamp = 0;
172
173         xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.hard_limit", &flac_cfg.output.replaygain.hard_limit);
174
175         xmms_cfg_read_boolean(cfg, "flac", "output.resolution.normal.dither_24_to_16", &flac_cfg.output.resolution.normal.dither_24_to_16);
176         xmms_cfg_read_boolean(cfg, "flac", "output.resolution.replaygain.dither", &flac_cfg.output.resolution.replaygain.dither);
177
178         if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.noise_shaping", &flac_cfg.output.resolution.replaygain.noise_shaping))
179                 flac_cfg.output.resolution.replaygain.noise_shaping = 1;
180
181         if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.bps_out", &flac_cfg.output.resolution.replaygain.bps_out))
182                 flac_cfg.output.resolution.replaygain.bps_out = 16;
183
184         decoder_ = FLAC__file_decoder_new();
185
186         xmms_cfg_free(cfg);
187 }
188
189 int FLAC_XMMS__is_our_file(char *filename)
190 {
191         char *ext;
192
193         ext = strrchr(filename, '.');
194         if(ext)
195                 if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
196                         return 1;
197         return 0;
198 }
199
200 void FLAC_XMMS__play_file(char *filename)
201 {
202         FILE *f;
203
204         sample_buffer_first_ = sample_buffer_last_ = 0;
205         audio_error_ = false;
206         file_info_.abort_flag = false;
207         file_info_.is_playing = false;
208         file_info_.eof = false;
209         file_info_.play_thread_open = false;
210         file_info_.has_replaygain = false;
211
212         if(0 == (f = fopen(filename, "r")))
213                 return;
214         fclose(f);
215
216         if(decoder_ == 0)
217                 return;
218
219         if(!safe_decoder_init_(filename, decoder_))
220                 return;
221
222         if(file_info_.has_replaygain && flac_cfg.output.replaygain.enable) {
223                 if(flac_cfg.output.resolution.replaygain.bps_out == 8) {
224                         file_info_.sample_format = FMT_U8;
225                         file_info_.sample_format_bytes_per_sample = 1;
226                 }
227                 else if(flac_cfg.output.resolution.replaygain.bps_out == 16) {
228                         file_info_.sample_format = FMT_S16_LE;
229                         file_info_.sample_format_bytes_per_sample = 2;
230                 }
231                 else {
232                         /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
233                         fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", flac_cfg.output.resolution.replaygain.bps_out);
234                         safe_decoder_finish_(decoder_);
235                         return;
236                 }
237         }
238         else {
239                 if(file_info_.bits_per_sample == 8) {
240                         file_info_.sample_format = FMT_U8;
241                         file_info_.sample_format_bytes_per_sample = 1;
242                 }
243                 else if(file_info_.bits_per_sample == 16 || (file_info_.bits_per_sample == 24 && flac_cfg.output.resolution.normal.dither_24_to_16)) {
244                         file_info_.sample_format = FMT_S16_LE;
245                         file_info_.sample_format_bytes_per_sample = 2;
246                 }
247                 else {
248                         /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
249                         fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", file_info_.bits_per_sample);
250                         safe_decoder_finish_(decoder_);
251                         return;
252                 }
253         }
254         FLAC__plugin_common__init_dither_context(&file_info_.dither_context, file_info_.sample_format_bytes_per_sample * 8, flac_cfg.output.resolution.replaygain.noise_shaping);
255         file_info_.is_playing = true;
256
257         if(flac_ip.output->open_audio(file_info_.sample_format, file_info_.sample_rate, file_info_.channels) == 0) {
258                 audio_error_ = true;
259                 safe_decoder_finish_(decoder_);
260                 return;
261         }
262
263         file_info_.title = flac_format_song_title(filename);
264         flac_ip.set_info(file_info_.title, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
265
266         file_info_.seek_to_in_sec = -1;
267         file_info_.play_thread_open = true;
268         pthread_create(&decode_thread_, NULL, play_loop_, NULL);
269 }
270
271 void FLAC_XMMS__stop()
272 {
273         if(file_info_.is_playing) {
274                 file_info_.is_playing = false;
275                 if(file_info_.play_thread_open) {
276                         file_info_.play_thread_open = false;
277                         pthread_join(decode_thread_, NULL);
278                 }
279                 flac_ip.output->close_audio();
280                 safe_decoder_finish_(decoder_);
281         }
282 }
283
284 void FLAC_XMMS__pause(short p)
285 {
286         flac_ip.output->pause(p);
287 }
288
289 void FLAC_XMMS__seek(int time)
290 {
291         file_info_.seek_to_in_sec = time;
292         file_info_.eof = false;
293
294         while(file_info_.seek_to_in_sec != -1)
295                 xmms_usleep(10000);
296 }
297
298 int FLAC_XMMS__get_time()
299 {
300         if(audio_error_)
301                 return -2;
302         if(!file_info_.is_playing || (file_info_.eof && !flac_ip.output->buffer_playing()))
303                 return -1;
304         else
305                 return flac_ip.output->output_time();
306 }
307
308 void FLAC_XMMS__cleanup()
309 {
310         safe_decoder_delete_(decoder_);
311         decoder_ = 0;
312 }
313
314 void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
315 {
316         FLAC__StreamMetadata streaminfo;
317
318         if(0 == filename)
319                 filename = "";
320
321         if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
322                 /* @@@ how to report the error? */
323                 if(title) {
324                         static const char *errtitle = "Invalid FLAC File: ";
325                         *title = g_malloc(strlen(errtitle) + 1 + strlen(filename) + 1 + 1);
326                         sprintf(*title, "%s\"%s\"", errtitle, filename);
327                 }
328                 if(length_in_msec)
329                         *length_in_msec = -1;
330                 return;
331         }
332
333         if(title) {
334                 *title = flac_format_song_title(filename);
335         }
336         if(length_in_msec)
337                 *length_in_msec = streaminfo.data.stream_info.total_samples * 10 / (streaminfo.data.stream_info.sample_rate / 100);
338 }
339
340 /***********************************************************************
341  * local routines
342  **********************************************************************/
343
344 void *play_loop_(void *arg)
345 {
346         unsigned written_time_last = 0, bh_index_last_w = 0, bh_index_last_o = BITRATE_HIST_SIZE, blocksize = 1;
347         FLAC__uint64 decode_position_last = 0, decode_position_frame_last = 0, decode_position_frame = 0;
348
349         (void)arg;
350
351         while(file_info_.is_playing) {
352                 if(!file_info_.eof) {
353                         while(sample_buffer_last_ - sample_buffer_first_ < SAMPLES_PER_WRITE) {
354                                 unsigned s;
355
356                                 s = sample_buffer_last_ - sample_buffer_first_;
357                                 if(FLAC__file_decoder_get_state(decoder_) == FLAC__FILE_DECODER_END_OF_FILE) {
358                                         file_info_.eof = true;
359                                         break;
360                                 }
361                                 else if(!FLAC__file_decoder_process_single(decoder_)) {
362                                         /*@@@ this should probably be a dialog */
363                                         fprintf(stderr, "libxmms-flac: READ ERROR processing frame\n");
364                                         file_info_.eof = true;
365                                         break;
366                                 }
367                                 blocksize = sample_buffer_last_ - sample_buffer_first_ - s;
368                                 decode_position_frame_last = decode_position_frame;
369                                 if(!FLAC__file_decoder_get_decode_position(decoder_, &decode_position_frame))
370                                         decode_position_frame = 0;
371                         }
372                         if(sample_buffer_last_ - sample_buffer_first_ > 0) {
373                                 const unsigned n = min(sample_buffer_last_ - sample_buffer_first_, SAMPLES_PER_WRITE);
374                                 int bytes = n * file_info_.channels * file_info_.sample_format_bytes_per_sample;
375                                 FLAC__byte *sample_buffer_start = sample_buffer_ + sample_buffer_first_ * file_info_.channels * file_info_.sample_format_bytes_per_sample;
376                                 unsigned written_time, bh_index_w;
377                                 FLAC__uint64 decode_position;
378
379                                 sample_buffer_first_ += n;
380                                 flac_ip.add_vis_pcm(flac_ip.output->written_time(), file_info_.sample_format, file_info_.channels, bytes, sample_buffer_start);
381                                 while(flac_ip.output->buffer_free() < (int)bytes && file_info_.is_playing && file_info_.seek_to_in_sec == -1)
382                                         xmms_usleep(10000);
383                                 if(file_info_.is_playing && file_info_.seek_to_in_sec == -1)
384                                         flac_ip.output->write_audio(sample_buffer_start, bytes);
385
386                                 /* compute current bitrate */
387
388                                 written_time = flac_ip.output->written_time();
389                                 bh_index_w = written_time / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
390                                 if(bh_index_w != bh_index_last_w) {
391                                         bh_index_last_w = bh_index_w;
392                                         decode_position = decode_position_frame - (double)(sample_buffer_last_ - sample_buffer_first_) * (double)(decode_position_frame - decode_position_frame_last) / (double)blocksize;
393                                         bitrate_history_[(bh_index_w + BITRATE_HIST_SIZE - 1) % BITRATE_HIST_SIZE] =
394                                                 decode_position > decode_position_last && written_time > written_time_last ?
395                                                         8000 * (decode_position - decode_position_last) / (written_time - written_time_last) :
396                                                         file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample;
397                                         decode_position_last = decode_position;
398                                         written_time_last = written_time;
399                                 }
400                         }
401                         else {
402                                 file_info_.eof = true;
403                                 xmms_usleep(10000);
404                         }
405                 }
406                 else
407                         xmms_usleep(10000);
408                 if(file_info_.seek_to_in_sec != -1) {
409                         const double distance = (double)file_info_.seek_to_in_sec * 1000.0 / (double)file_info_.length_in_msec;
410                         unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
411                         if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
412                                 flac_ip.output->flush(file_info_.seek_to_in_sec * 1000);
413                                 bh_index_last_w = bh_index_last_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
414                                 if(!FLAC__file_decoder_get_decode_position(decoder_, &decode_position_frame))
415                                         decode_position_frame = 0;
416                                 file_info_.seek_to_in_sec = -1;
417                                 file_info_.eof = false;
418                                 sample_buffer_first_ = sample_buffer_last_ = 0;
419                         }
420                 }
421                 else {
422                         /* display the right bitrate from history */
423                         unsigned bh_index_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
424                         if(bh_index_o != bh_index_last_o && bh_index_o != bh_index_last_w && bh_index_o != (bh_index_last_w + 1) % BITRATE_HIST_SIZE) {
425                                 bh_index_last_o = bh_index_o;
426                                 flac_ip.set_info(file_info_.title, file_info_.length_in_msec, bitrate_history_[bh_index_o], file_info_.sample_rate, file_info_.channels);
427                         }
428                 }
429         }
430
431         safe_decoder_finish_(decoder_);
432
433         /* are these two calls necessary? */
434         flac_ip.output->buffer_free();
435         flac_ip.output->buffer_free();
436
437         g_free(file_info_.title);
438
439         pthread_exit(NULL);
440         return 0; /* to silence the compiler warning about not returning a value */
441 }
442
443 FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder)
444 {
445         if(decoder == 0)
446                 return false;
447
448         safe_decoder_finish_(decoder);
449
450         FLAC__file_decoder_set_md5_checking(decoder, false);
451         FLAC__file_decoder_set_filename(decoder, filename);
452         FLAC__file_decoder_set_metadata_ignore_all(decoder);
453         FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
454         FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
455         FLAC__file_decoder_set_write_callback(decoder, write_callback_);
456         FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
457         FLAC__file_decoder_set_error_callback(decoder, error_callback_);
458         FLAC__file_decoder_set_client_data(decoder, &file_info_);
459         if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK)
460                 return false;
461
462         if(!FLAC__file_decoder_process_until_end_of_metadata(decoder))
463                 return false;
464
465         return true;
466 }
467
468 void safe_decoder_finish_(FLAC__FileDecoder *decoder)
469 {
470         if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
471                 FLAC__file_decoder_finish(decoder);
472 }
473
474 void safe_decoder_delete_(FLAC__FileDecoder *decoder)
475 {
476         if(decoder) {
477                 safe_decoder_finish_(decoder);
478                 FLAC__file_decoder_delete(decoder);
479         }
480 }
481
482 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
483 {
484         file_info_struct *file_info = (file_info_struct *)client_data;
485         const unsigned channels = file_info->channels, wide_samples = frame->header.blocksize;
486         const unsigned bits_per_sample = file_info->bits_per_sample;
487         FLAC__byte *sample_buffer_start;
488
489         (void)decoder;
490
491         if(file_info->abort_flag)
492                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
493
494         if((sample_buffer_last_ + wide_samples) > (SAMPLE_BUFFER_SIZE / (channels * file_info->sample_format_bytes_per_sample))) {
495                 memmove(sample_buffer_, sample_buffer_ + sample_buffer_first_ * channels * file_info->sample_format_bytes_per_sample, (sample_buffer_last_ - sample_buffer_first_) * channels * file_info->sample_format_bytes_per_sample);
496                 sample_buffer_last_ -= sample_buffer_first_;
497                 sample_buffer_first_ = 0;
498         }
499         sample_buffer_start = sample_buffer_ + sample_buffer_last_ * channels * file_info->sample_format_bytes_per_sample;
500         if(file_info_.has_replaygain && flac_cfg.output.replaygain.enable) {
501                 FLAC__plugin_common__apply_gain(
502                                 sample_buffer_start,
503                                 buffer,
504                                 wide_samples,
505                                 channels,
506                                 bits_per_sample,
507                                 file_info->sample_format_bytes_per_sample * 8,
508                                 file_info_.replay_scale,
509                                 flac_cfg.output.replaygain.hard_limit,
510                                 flac_cfg.output.resolution.replaygain.dither,
511                                 &file_info_.dither_context
512                 );
513         }
514         else {
515                 FLAC__plugin_common__pack_pcm_signed_little_endian(
516                         sample_buffer_start,
517                         buffer,
518                         wide_samples,
519                         channels,
520                         bits_per_sample,
521                         file_info->sample_format_bytes_per_sample * 8
522                 );
523         }
524
525         sample_buffer_last_ += wide_samples;
526
527         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
528 }
529
530 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
531 {
532         file_info_struct *file_info = (file_info_struct *)client_data;
533         (void)decoder;
534         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
535                 FLAC__ASSERT(metadata->data.stream_info.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
536                 file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff);
537                 file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
538                 file_info->channels = metadata->data.stream_info.channels;
539                 file_info->sample_rate = metadata->data.stream_info.sample_rate;
540                 file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
541         }
542         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
543                 double gain, peak;
544                 if(grabbag__replaygain_load_from_vorbiscomment(metadata, flac_cfg.output.replaygain.album_mode, &gain, &peak)) {
545                         file_info_.has_replaygain = true;
546                         file_info_.replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)flac_cfg.output.replaygain.preamp, /*prevent_clipping=*/!flac_cfg.output.replaygain.hard_limit);
547                 }
548         }
549 }
550
551 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
552 {
553         file_info_struct *file_info = (file_info_struct *)client_data;
554         (void)decoder;
555         if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
556                 file_info->abort_flag = true;
557 }