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[vlc] / modules / demux / flac.c
1 /*****************************************************************************
2  * flac.c : FLAC demux module for vlc
3  *****************************************************************************
4  * Copyright (C) 2001-2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
8  *          Laurent Aimar <fenrir@via.ecp.fr>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
35 #include <vlc_meta.h>
36 #include <vlc_input.h>
37 #include <vlc_codec.h>
38 #include <assert.h>
39 #include <vlc_charset.h>
40 #include "vorbis.h"
41
42 /*****************************************************************************
43  * Module descriptor
44  *****************************************************************************/
45 static int  Open  ( vlc_object_t * );
46 static void Close ( vlc_object_t * );
47
48 vlc_module_begin ()
49     set_description( N_("FLAC demuxer") )
50     set_capability( "demux", 155 )
51     set_category( CAT_INPUT )
52     set_subcategory( SUBCAT_INPUT_DEMUX )
53     set_callbacks( Open, Close )
54     add_shortcut( "flac" )
55 vlc_module_end ()
56
57 /*****************************************************************************
58  * Local prototypes
59  *****************************************************************************/
60 static int Demux  ( demux_t * );
61 static int Control( demux_t *, int, va_list );
62
63 static int  ReadMeta( demux_t *, uint8_t **pp_streaminfo, int *pi_streaminfo );
64
65 struct demux_sys_t
66 {
67     bool  b_start;
68     es_out_id_t *p_es;
69
70     /* Packetizer */
71     decoder_t *p_packetizer;
72
73     vlc_meta_t *p_meta;
74     audio_replay_gain_t replay_gain;
75
76     int64_t i_time_offset;
77     int64_t i_pts;
78     int64_t i_pts_start;
79
80     int64_t i_length; /* Length from stream info */
81     int64_t i_data_pos;
82
83     /* */
84     int         i_seekpoint;
85     seekpoint_t **seekpoint;
86
87     /* */
88     int                i_attachments;
89     input_attachment_t **attachments;
90     int                i_cover_idx;
91     int                i_cover_score;
92 };
93
94 #define STREAMINFO_SIZE 38
95 #define FLAC_PACKET_SIZE 16384
96
97 /*****************************************************************************
98  * Open: initializes ES structures
99  *****************************************************************************/
100 static int Open( vlc_object_t * p_this )
101 {
102     demux_t     *p_demux = (demux_t*)p_this;
103     demux_sys_t *p_sys;
104     const uint8_t *p_peek;
105     uint8_t     *p_streaminfo;
106     int         i_streaminfo;
107     es_format_t fmt;
108
109     /* Have a peep at the show. */
110     if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
111
112     if( p_peek[0]!='f' || p_peek[1]!='L' || p_peek[2]!='a' || p_peek[3]!='C' )
113     {
114         if( !p_demux->b_force ) return VLC_EGENERIC;
115
116         /* User forced */
117         msg_Err( p_demux, "this doesn't look like a flac stream, "
118                  "continuing anyway" );
119     }
120
121     p_demux->pf_demux   = Demux;
122     p_demux->pf_control = Control;
123     p_demux->p_sys      = p_sys = malloc( sizeof( demux_sys_t ) );
124     p_sys->b_start = true;
125     p_sys->p_meta = NULL;
126     memset( &p_sys->replay_gain, 0, sizeof(p_sys->replay_gain) );
127     p_sys->i_length = 0;
128     p_sys->i_time_offset = 0;
129     p_sys->i_pts = 0;
130     p_sys->i_pts_start = 0;
131     p_sys->p_es = NULL;
132     TAB_INIT( p_sys->i_seekpoint, p_sys->seekpoint );
133     TAB_INIT( p_sys->i_attachments, p_sys->attachments);
134     p_sys->i_cover_idx = 0;
135     p_sys->i_cover_score = 0;
136
137     /* We need to read and store the STREAMINFO metadata */
138     if( ReadMeta( p_demux, &p_streaminfo, &i_streaminfo ) )
139     {
140         free( p_sys );
141         return VLC_EGENERIC;
142     }
143
144     /* Load the FLAC packetizer */
145     /* Store STREAMINFO for the decoder and packetizer */
146     p_streaminfo[4] |= 0x80; /* Fake this as the last metadata block */
147     es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_FLAC );
148     fmt.i_extra = i_streaminfo;
149     fmt.p_extra = p_streaminfo;
150
151     p_sys->p_packetizer = demux_PacketizerNew( p_demux, &fmt, "flac" );
152     if( !p_sys->p_packetizer )
153     {
154         free( p_sys );
155         return VLC_EGENERIC;
156     }
157
158     if( p_sys->i_cover_idx < p_sys->i_attachments )
159     {
160         char psz_url[128];
161         if( !p_sys->p_meta )
162             p_sys->p_meta = vlc_meta_New();
163         snprintf( psz_url, sizeof(psz_url), "attachment://%s",
164                   p_sys->attachments[p_sys->i_cover_idx]->psz_name );
165         vlc_meta_Set( p_sys->p_meta, vlc_meta_ArtworkURL, psz_url );
166     }
167     vlc_audio_replay_gain_MergeFromMeta( &p_sys->replay_gain, p_sys->p_meta );
168     return VLC_SUCCESS;
169 }
170
171 /*****************************************************************************
172  * Close: frees unused data
173  *****************************************************************************/
174 static void Close( vlc_object_t * p_this )
175 {
176     demux_t     *p_demux = (demux_t*)p_this;
177     demux_sys_t *p_sys = p_demux->p_sys;
178
179     TAB_CLEAN( p_sys->i_seekpoint, p_sys->seekpoint );
180
181     int i;
182     for( i = 0; i < p_sys->i_attachments; i++ )
183         free( p_sys->attachments[i] );
184     TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
185
186     /* Delete the decoder */
187     demux_PacketizerDestroy( p_sys->p_packetizer );
188
189     if( p_sys->p_meta )
190         vlc_meta_Delete( p_sys->p_meta );
191     free( p_sys );
192 }
193
194 /*****************************************************************************
195  * Demux: reads and demuxes data packets
196  *****************************************************************************
197  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
198  *****************************************************************************/
199 static int Demux( demux_t *p_demux )
200 {
201     demux_sys_t *p_sys = p_demux->p_sys;
202     block_t     *p_block_in, *p_block_out;
203
204     if( !( p_block_in = stream_Block( p_demux->s, FLAC_PACKET_SIZE ) ) )
205         return 0;
206
207     p_block_in->i_pts = p_block_in->i_dts = p_sys->b_start ? VLC_TS_0 : VLC_TS_INVALID;
208     p_sys->b_start = false;
209
210     while( (p_block_out = p_sys->p_packetizer->pf_packetize(
211                 p_sys->p_packetizer, &p_block_in )) )
212     {
213         while( p_block_out )
214         {
215             block_t *p_next = p_block_out->p_next;
216
217             p_block_out->p_next = NULL;
218
219             if( p_sys->p_es == NULL )
220             {
221                 p_sys->p_packetizer->fmt_out.b_packetized = true;
222                 p_sys->p_packetizer->fmt_out.audio_replay_gain = p_sys->replay_gain;
223                 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
224             }
225
226             p_sys->i_pts = p_block_out->i_dts - VLC_TS_0;
227
228             /* Correct timestamp */
229             p_block_out->i_pts += p_sys->i_time_offset;
230             p_block_out->i_dts += p_sys->i_time_offset;
231
232             /* set PCR */
233             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block_out->i_dts );
234
235             es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
236
237             p_block_out = p_next;
238         }
239     }
240     return 1;
241 }
242
243 /*****************************************************************************
244  * Control:
245  *****************************************************************************/
246 static int64_t ControlGetLength( demux_t *p_demux )
247 {
248     demux_sys_t *p_sys = p_demux->p_sys;
249     const int64_t i_size = stream_Size(p_demux->s) - p_sys->i_data_pos;
250     int64_t i_length = p_sys->i_length;
251     int i;
252
253     /* Try to fix length using seekpoint and current size for truncated file */
254     for( i = p_sys->i_seekpoint-1; i >= 0; i-- )
255     {
256         seekpoint_t *s = p_sys->seekpoint[i];
257         if( s->i_byte_offset <= i_size )
258         {
259             if( i+1 < p_sys->i_seekpoint )
260             {
261                 /* Broken file */
262                 seekpoint_t *n = p_sys->seekpoint[i+1];
263                 assert( n->i_byte_offset != s->i_byte_offset); /* Should be ensured by ParseSeekTable */
264                 i_length = s->i_time_offset + (n->i_time_offset-s->i_time_offset) * (i_size-s->i_byte_offset) / (n->i_byte_offset-s->i_byte_offset);
265             }
266             break;
267         }
268     }
269     return i_length;
270 }
271
272 static int64_t ControlGetTime( demux_t *p_demux )
273 {
274     demux_sys_t *p_sys = p_demux->p_sys;
275     return __MAX(p_sys->i_pts, p_sys->i_pts_start) + p_sys->i_time_offset;
276 }
277
278 static int ControlSetTime( demux_t *p_demux, int64_t i_time )
279 {
280     demux_sys_t *p_sys = p_demux->p_sys;
281     int64_t i_delta_time;
282     bool b_seekable;
283     int i;
284
285     /* */
286     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable );
287     if( !b_seekable )
288         return VLC_EGENERIC;
289
290     /* */
291     assert( p_sys->i_seekpoint > 0 );   /* ReadMeta ensure at least (0,0) */
292     for( i = p_sys->i_seekpoint-1; i >= 0; i-- )
293     {
294         if( p_sys->seekpoint[i]->i_time_offset <= i_time )
295             break;
296     }
297     i_delta_time = i_time - p_sys->seekpoint[i]->i_time_offset;
298
299     /* XXX We do exact seek if it's not too far away(45s) */
300     if( i_delta_time < 45*INT64_C(1000000) )
301     {
302         if( stream_Seek( p_demux->s, p_sys->seekpoint[i]->i_byte_offset+p_sys->i_data_pos ) )
303             return VLC_EGENERIC;
304
305         p_sys->i_time_offset = p_sys->seekpoint[i]->i_time_offset - p_sys->i_pts;
306         p_sys->i_pts_start = p_sys->i_pts+i_delta_time;
307         es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, p_sys->i_pts_start + p_sys->i_time_offset );
308     }
309     else
310     {
311         int64_t i_delta_offset;
312         int64_t i_next_time;
313         int64_t i_next_offset;
314
315         if( i+1 < p_sys->i_seekpoint )
316         {
317             i_next_time   = p_sys->seekpoint[i+1]->i_time_offset;
318             i_next_offset = p_sys->seekpoint[i+1]->i_byte_offset;
319         }
320         else
321         {
322             i_next_time   = p_sys->i_length;
323             i_next_offset = stream_Size(p_demux->s)-p_sys->i_data_pos;
324         }
325
326         i_delta_offset = 0;
327         if( i_next_time-p_sys->seekpoint[i]->i_time_offset > 0 )
328             i_delta_offset = (i_next_offset - p_sys->seekpoint[i]->i_byte_offset) * i_delta_time /
329                              (i_next_time-p_sys->seekpoint[i]->i_time_offset);
330
331         if( stream_Seek( p_demux->s, p_sys->seekpoint[i]->i_byte_offset+p_sys->i_data_pos + i_delta_offset ) )
332             return VLC_EGENERIC;
333
334         p_sys->i_pts_start = p_sys->i_pts;
335         p_sys->i_time_offset = (p_sys->seekpoint[i]->i_time_offset+i_delta_time) - p_sys->i_pts;
336     }
337     return VLC_SUCCESS;
338 }
339
340 static int Control( demux_t *p_demux, int i_query, va_list args )
341 {
342     demux_sys_t *p_sys = p_demux->p_sys;
343
344     if( i_query == DEMUX_GET_META )
345     {
346         vlc_meta_t *p_meta = (vlc_meta_t *)va_arg( args, vlc_meta_t* );
347         if( p_demux->p_sys->p_meta )
348             vlc_meta_Merge( p_meta, p_demux->p_sys->p_meta );
349         return VLC_SUCCESS;
350     }
351     else if( i_query == DEMUX_HAS_UNSUPPORTED_META )
352     {
353         bool *pb_bool = (bool*)va_arg( args, bool* );
354         *pb_bool = true;
355         return VLC_SUCCESS;
356     }
357     else if( i_query == DEMUX_GET_LENGTH )
358     {
359         int64_t *pi64 = (int64_t*)va_arg( args, int64_t * );
360         *pi64 = ControlGetLength( p_demux );
361         return VLC_SUCCESS;
362     }
363     else if( i_query == DEMUX_SET_TIME )
364     {
365         int64_t i_time = (int64_t)va_arg( args, int64_t );
366         return ControlSetTime( p_demux, i_time );
367     }
368     else if( i_query == DEMUX_SET_POSITION )
369     {
370         const double f = (double)va_arg( args, double );
371         int64_t i_time = f * ControlGetLength( p_demux );
372         return ControlSetTime( p_demux, i_time );
373     }
374     else if( i_query == DEMUX_GET_TIME )
375     {
376         int64_t *pi64 = (int64_t*)va_arg( args, int64_t * );
377         *pi64 = ControlGetTime( p_demux );
378         return VLC_SUCCESS;
379     }
380     else if( i_query == DEMUX_GET_POSITION )
381     {
382         double *pf = (double*)va_arg( args, double * );
383         const int64_t i_length = ControlGetLength(p_demux);
384         if( i_length > 0 )
385         {
386             double current = ControlGetTime(p_demux);
387             *pf = current / (double)i_length;
388         }
389         else
390             *pf= 0.0;
391         return VLC_SUCCESS;
392     }
393     else if( i_query == DEMUX_GET_ATTACHMENTS )
394     {
395         input_attachment_t ***ppp_attach =
396             (input_attachment_t***)va_arg( args, input_attachment_t*** );
397         int *pi_int = (int*)va_arg( args, int * );
398         int i;
399
400         if( p_sys->i_attachments <= 0 )
401             return VLC_EGENERIC;
402
403         *pi_int = p_sys->i_attachments;;
404         *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
405         for( i = 0; i < p_sys->i_attachments; i++ )
406             (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
407         return VLC_SUCCESS;
408     }
409
410     return demux_vaControlHelper( p_demux->s, p_sys->i_data_pos, -1,
411                                    8*0, 1, i_query, args );
412 }
413
414 enum
415 {
416     META_STREAMINFO = 0,
417     META_SEEKTABLE = 3,
418     META_COMMENT = 4,
419     META_PICTURE = 6,
420 };
421
422 static inline int Get24bBE( const uint8_t *p )
423 {
424     return (p[0] << 16)|(p[1] << 8)|(p[2]);
425 }
426
427 static void ParseStreamInfo( int *pi_rate, int64_t *pi_count, uint8_t *p_data );
428 static void ParseSeekTable( demux_t *p_demux, const uint8_t *p_data, int i_data,
429                             int i_sample_rate );
430 static void ParseComment( demux_t *, const uint8_t *p_data, int i_data );
431 static void ParsePicture( demux_t *, const uint8_t *p_data, int i_data );
432
433 static int  ReadMeta( demux_t *p_demux, uint8_t **pp_streaminfo, int *pi_streaminfo )
434 {
435     demux_sys_t *p_sys = p_demux->p_sys;
436     int     i_peek;
437     const uint8_t *p_peek;
438     bool b_last;
439     int i_sample_rate;
440     int64_t i_sample_count;
441     seekpoint_t *s;
442
443     /* Read STREAMINFO */
444     i_peek = stream_Peek( p_demux->s, &p_peek, 8 );
445     if( (p_peek[4] & 0x7F) != META_STREAMINFO )
446     {
447         msg_Err( p_demux, "this isn't a STREAMINFO metadata block" );
448         return VLC_EGENERIC;
449     }
450     if( Get24bBE(&p_peek[5]) != (STREAMINFO_SIZE - 4) )
451     {
452         msg_Err( p_demux, "invalid size for a STREAMINFO metadata block" );
453         return VLC_EGENERIC;
454     }
455
456     *pi_streaminfo = 4 + STREAMINFO_SIZE;
457     *pp_streaminfo = malloc( 4 + STREAMINFO_SIZE );
458     if( *pp_streaminfo == NULL )
459         return VLC_EGENERIC;
460
461     if( stream_Read( p_demux->s, *pp_streaminfo, 4+STREAMINFO_SIZE ) != 4+STREAMINFO_SIZE )
462     {
463         msg_Err( p_demux, "failed to read STREAMINFO metadata block" );
464         free( *pp_streaminfo );
465         return VLC_EGENERIC;
466     }
467
468     /* */
469     ParseStreamInfo( &i_sample_rate, &i_sample_count, *pp_streaminfo );
470     if( i_sample_rate > 0 )
471         p_sys->i_length = i_sample_count * INT64_C(1000000)/i_sample_rate;
472
473     /* Be sure we have seekpoint 0 */
474     s = vlc_seekpoint_New();
475     s->i_time_offset = 0;
476     s->i_byte_offset = 0;
477     TAB_APPEND( p_sys->i_seekpoint, p_sys->seekpoint, s );
478
479     b_last = (*pp_streaminfo)[4]&0x80;
480     while( !b_last )
481     {
482         int i_len;
483         int i_type;
484
485         i_peek = stream_Peek( p_demux->s, &p_peek, 4 );
486         if( i_peek < 4 )
487             break;
488         b_last = p_peek[0]&0x80;
489         i_type = p_peek[0]&0x7f;
490         i_len  = Get24bBE( &p_peek[1] );
491
492         if( i_type == META_SEEKTABLE )
493         {
494             i_peek = stream_Peek( p_demux->s, &p_peek, 4+i_len );
495             if( i_peek == 4+i_len )
496                 ParseSeekTable( p_demux, p_peek, i_peek, i_sample_rate );
497         }
498         else if( i_type == META_COMMENT )
499         {
500             i_peek = stream_Peek( p_demux->s, &p_peek, 4+i_len );
501             if( i_peek == 4+i_len )
502                 ParseComment( p_demux, p_peek, i_peek );
503         }
504         else if( i_type == META_PICTURE )
505         {
506             i_peek = stream_Peek( p_demux->s, &p_peek, 4+i_len );
507             if( i_peek == 4+i_len )
508                 ParsePicture( p_demux, p_peek, i_peek );
509         }
510
511         if( stream_Read( p_demux->s, NULL, 4+i_len ) < 4+i_len )
512             break;
513     }
514
515     /* */
516     p_sys->i_data_pos = stream_Tell( p_demux->s );
517
518     return VLC_SUCCESS;
519 }
520 static void ParseStreamInfo( int *pi_rate, int64_t *pi_count, uint8_t *p_data )
521 {
522     const int i_skip = 4+4;
523
524     *pi_rate = GetDWBE(&p_data[i_skip+4+6]) >> 12;
525     *pi_count = GetQWBE(&p_data[i_skip+4+6]) &  ((INT64_C(1)<<36)-1);
526 }
527
528 static void ParseSeekTable( demux_t *p_demux, const uint8_t *p_data, int i_data,
529                             int i_sample_rate )
530 {
531     demux_sys_t *p_sys = p_demux->p_sys;
532     seekpoint_t *s;
533     int i;
534
535     if( i_sample_rate <= 0 )
536         return;
537
538     /* */
539     for( i = 0; i < (i_data-4)/18; i++ )
540     {
541         const int64_t i_sample = GetQWBE( &p_data[4+18*i+0] );
542         int j;
543
544         if( i_sample < 0 || i_sample >= INT64_MAX )
545             continue;
546
547         s = vlc_seekpoint_New();
548         s->i_time_offset = i_sample * INT64_C(1000000)/i_sample_rate;
549         s->i_byte_offset = GetQWBE( &p_data[4+18*i+8] );
550
551         /* Check for duplicate entry */
552         for( j = 0; j < p_sys->i_seekpoint; j++ )
553         {
554             if( p_sys->seekpoint[j]->i_time_offset == s->i_time_offset ||
555                 p_sys->seekpoint[j]->i_byte_offset == s->i_byte_offset )
556             {
557                 vlc_seekpoint_Delete( s );
558                 s = NULL;
559                 break;
560             }
561         }
562         if( s )
563         {
564             TAB_APPEND( p_sys->i_seekpoint, p_sys->seekpoint, s );
565         }
566     }
567     /* TODO sort it by size and remove wrong seek entry (time not increasing) */
568 }
569
570 #define RM(x) do { i_data -= (x); p_data += (x); } while(0)
571 static void ParseComment( demux_t *p_demux, const uint8_t *p_data, int i_data )
572 {
573     demux_sys_t *p_sys = p_demux->p_sys;
574
575     if( i_data < 4 )
576         return;
577
578     vorbis_ParseComment( &p_sys->p_meta, &p_data[4], i_data - 4 );
579
580 }
581
582 static void ParsePicture( demux_t *p_demux, const uint8_t *p_data, int i_data )
583 {
584     static const int pi_cover_score[] = {
585         0,      /* other */
586         2, 1,   /* icons */
587         10,     /* front cover */
588         9,      /* back cover */
589         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
590         6,      /* movie/video screen capture */
591         0,
592         7,      /* Illustration */
593         8,      /* Band/Artist logotype */
594         0,      /* Publisher/Studio */
595     };
596     demux_sys_t *p_sys = p_demux->p_sys;
597     int i_type;
598     int i_len;
599     char *psz_mime = NULL;
600     char *psz_description = NULL;
601     input_attachment_t *p_attachment;
602     char psz_name[128];
603
604     if( i_data < 4 + 3*4 )
605         return;
606 #define RM(x) do { i_data -= (x); p_data += (x); } while(0)
607     RM(4);
608
609     i_type = GetDWBE( p_data ); RM(4);
610     i_len = GetDWBE( p_data ); RM(4);
611     if( i_len < 0 || i_data < i_len + 4 )
612         goto error;
613     psz_mime = strndup( (const char*)p_data, i_len ); RM(i_len);
614     i_len = GetDWBE( p_data ); RM(4);
615     if( i_len < 0 || i_data < i_len + 4*4 + 4)
616         goto error;
617     psz_description = strndup( (const char*)p_data, i_len ); RM(i_len);
618     EnsureUTF8( psz_description );
619     RM(4*4);
620     i_len = GetDWBE( p_data ); RM(4);
621     if( i_len < 0 || i_len > i_data )
622         goto error;
623
624     msg_Dbg( p_demux, "FLAC: Picture type=%d mime=%s description='%s' file length=%d",
625              i_type, psz_mime, psz_description, i_len );
626
627     snprintf( psz_name, sizeof(psz_name), "picture%d", p_sys->i_attachments );
628     if( !strcasecmp( psz_mime, "image/jpeg" ) )
629         strcat( psz_name, ".jpg" );
630     else if( !strcasecmp( psz_mime, "image/png" ) )
631         strcat( psz_name, ".png" );
632
633     p_attachment = vlc_input_attachment_New( psz_name, psz_mime, psz_description,
634                                              p_data, i_data );
635     TAB_APPEND( p_sys->i_attachments, p_sys->attachments, p_attachment );
636
637     if( i_type >= 0 && (unsigned int)i_type < sizeof(pi_cover_score)/sizeof(pi_cover_score[0]) &&
638         p_sys->i_cover_score < pi_cover_score[i_type] )
639     {
640         p_sys->i_cover_idx = p_sys->i_attachments-1;
641         p_sys->i_cover_score = pi_cover_score[i_type];
642     }
643 error:
644     free( psz_mime );
645     free( psz_description );
646 }
647 #undef RM
648