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[vlc] / src / input / demux.c
1 /*****************************************************************************
2  * demux.c
3  *****************************************************************************
4  * Copyright (C) 1999-2004 the VideoLAN team
5  * $Id$
6  *
7  * Author: Laurent Aimar <fenrir@via.ecp.fr>
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, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
27
28 #include "demux.h"
29 #include <libvlc.h>
30 #include <vlc_codec.h>
31 #include <vlc_meta.h>
32
33 static bool SkipID3Tag( demux_t * );
34 static bool SkipAPETag( demux_t *p_demux );
35
36 /*****************************************************************************
37  * demux_New:
38  *  if s is NULL then load a access_demux
39  *****************************************************************************/
40 demux_t *__demux_New( vlc_object_t *p_obj, input_thread_t *p_parent_input,
41                        const char *psz_access, const char *psz_demux,
42                        const char *psz_path,
43                        stream_t *s, es_out_t *out, bool b_quick )
44 {
45     static const char typename[] = "demux";
46     demux_t *p_demux = vlc_custom_create( p_obj, sizeof( *p_demux ),
47                                           VLC_OBJECT_GENERIC, typename );
48     const char *psz_module;
49
50     if( p_demux == NULL ) return NULL;
51
52     p_demux->p_input = p_parent_input;
53
54     /* Parse URL */
55     p_demux->psz_access = strdup( psz_access );
56     p_demux->psz_demux  = strdup( psz_demux );
57     p_demux->psz_path   = strdup( psz_path );
58
59     /* Take into account "demux" to be able to do :demux=dump */
60     if( p_demux->psz_demux && *p_demux->psz_demux == '\0' )
61     {
62         free( p_demux->psz_demux );
63         p_demux->psz_demux = var_GetNonEmptyString( p_obj, "demux" );
64         if( p_demux->psz_demux == NULL )
65             p_demux->psz_demux = strdup( "" );
66     }
67
68     if( !b_quick )
69     {
70         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
71                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
72     }
73
74     p_demux->s          = s;
75     p_demux->out        = out;
76
77     p_demux->pf_demux   = NULL;
78     p_demux->pf_control = NULL;
79     p_demux->p_sys      = NULL;
80     p_demux->info.i_update = 0;
81     p_demux->info.i_title  = 0;
82     p_demux->info.i_seekpoint = 0;
83
84     if( s ) psz_module = p_demux->psz_demux;
85     else psz_module = p_demux->psz_access;
86
87     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
88     {
89        /* XXX: add only file without any problem here and with strong detection.
90         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
91         *     anyway
92         *  - wav can't be added 'cause of a52 and dts in them as raw audio
93          */
94          static const struct { char ext[5]; char demux[9]; } exttodemux[] =
95          {
96             { "aac",  "aac" },
97             { "aiff", "aiff" },
98             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
99             { "avi",  "avi" },
100             { "au",   "au" },
101             { "flac", "flac" },
102             { "dv",   "dv" },
103             { "drc",  "dirac" },
104             { "m3u",  "m3u" },
105             { "m3u8", "m3u8" },
106             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
107             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
108             { "nsv",  "nsv" },
109             { "ogg",  "ogg" }, { "ogm",  "ogg" }, /* legacy Ogg */
110             { "oga",  "ogg" }, { "spx",  "ogg" }, { "ogv", "ogg" },
111             { "ogx",  "ogg" }, /*RFC5334*/
112             { "pva",  "pva" },
113             { "rm",   "rm" },
114             { "m4v",  "m4v" },
115             { "h264", "h264" },
116             { "voc",  "voc" },
117             { "mid",  "smf" }, { "rmi",  "smf" },
118             { "",  "" },
119         };
120         /* Here, we don't mind if it does not work, it must be quick */
121         static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
122         {
123             { "mp3", "mpga" },
124             { "ogg", "ogg" },
125             { "wma", "asf" },
126             { "", "" }
127         };
128
129         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
130         int  i;
131
132         if( !b_quick )
133         {
134             for( i = 0; exttodemux[i].ext[0]; i++ )
135             {
136                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
137                 {
138                     psz_module = exttodemux[i].demux;
139                     break;
140                 }
141             }
142         }
143         else
144         {
145             for( i = 0; exttodemux_quick[i].ext[0]; i++ )
146             {
147                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
148                 {
149                     psz_module = exttodemux_quick[i].demux;
150                     break;
151                 }
152             }
153
154         }
155     }
156
157     /* Before module_need (for var_Create...) */
158     vlc_object_attach( p_demux, p_obj );
159
160     if( s )
161     {
162         /* ID3/APE tags will mess-up demuxer probing so we skip it here.
163          * ID3/APE parsers will called later on in the demuxer to access the
164          * skipped info. */
165         if( !SkipID3Tag( p_demux ) )
166             SkipAPETag( p_demux );
167
168         p_demux->p_module =
169             module_need( p_demux, "demux", psz_module,
170                          !strcmp( psz_module, p_demux->psz_demux ) );
171     }
172     else
173     {
174         p_demux->p_module =
175             module_need( p_demux, "access_demux", psz_module,
176                          !strcmp( psz_module, p_demux->psz_access ) );
177     }
178
179     if( p_demux->p_module == NULL )
180     {
181         vlc_object_detach( p_demux );
182         free( p_demux->psz_path );
183         free( p_demux->psz_demux );
184         free( p_demux->psz_access );
185         vlc_object_release( p_demux );
186         return NULL;
187     }
188
189     return p_demux;
190 }
191
192 /*****************************************************************************
193  * demux_Delete:
194  *****************************************************************************/
195 void demux_Delete( demux_t *p_demux )
196 {
197     module_unneed( p_demux, p_demux->p_module );
198     vlc_object_detach( p_demux );
199
200     free( p_demux->psz_path );
201     free( p_demux->psz_demux );
202     free( p_demux->psz_access );
203
204     vlc_object_release( p_demux );
205 }
206
207 /*****************************************************************************
208  * demux_GetParentInput:
209  *****************************************************************************/
210 input_thread_t * demux_GetParentInput( demux_t *p_demux )
211 {
212     return p_demux->p_input ? vlc_object_hold((vlc_object_t*)p_demux->p_input) : NULL;
213 }
214
215
216 /*****************************************************************************
217  * demux_vaControlHelper:
218  *****************************************************************************/
219 int demux_vaControlHelper( stream_t *s,
220                             int64_t i_start, int64_t i_end,
221                             int64_t i_bitrate, int i_align,
222                             int i_query, va_list args )
223 {
224     int64_t i_tell;
225     double  f, *pf;
226     int64_t i64, *pi64;
227
228     if( i_end < 0 )    i_end   = stream_Size( s );
229     if( i_start < 0 )  i_start = 0;
230     if( i_align <= 0 ) i_align = 1;
231     i_tell = stream_Tell( s );
232
233     switch( i_query )
234     {
235         case DEMUX_GET_LENGTH:
236             pi64 = (int64_t*)va_arg( args, int64_t * );
237             if( i_bitrate > 0 && i_end > i_start )
238             {
239                 *pi64 = INT64_C(8000000) * (i_end - i_start) / i_bitrate;
240                 return VLC_SUCCESS;
241             }
242             return VLC_EGENERIC;
243
244         case DEMUX_GET_TIME:
245             pi64 = (int64_t*)va_arg( args, int64_t * );
246             if( i_bitrate > 0 && i_tell >= i_start )
247             {
248                 *pi64 = INT64_C(8000000) * (i_tell - i_start) / i_bitrate;
249                 return VLC_SUCCESS;
250             }
251             return VLC_EGENERIC;
252
253         case DEMUX_GET_POSITION:
254             pf = (double*)va_arg( args, double * );
255             if( i_start < i_end )
256             {
257                 *pf = (double)( i_tell - i_start ) /
258                       (double)( i_end  - i_start );
259                 return VLC_SUCCESS;
260             }
261             return VLC_EGENERIC;
262
263
264         case DEMUX_SET_POSITION:
265             f = (double)va_arg( args, double );
266             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
267             {
268                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
269
270                 if( stream_Seek( s, i_start + i_block * i_align ) )
271                 {
272                     return VLC_EGENERIC;
273                 }
274                 return VLC_SUCCESS;
275             }
276             return VLC_EGENERIC;
277
278         case DEMUX_SET_TIME:
279             i64 = (int64_t)va_arg( args, int64_t );
280             if( i_bitrate > 0 && i64 >= 0 )
281             {
282                 int64_t i_block = i64 * i_bitrate / INT64_C(8000000) / i_align;
283                 if( stream_Seek( s, i_start + i_block * i_align ) )
284                 {
285                     return VLC_EGENERIC;
286                 }
287                 return VLC_SUCCESS;
288             }
289             return VLC_EGENERIC;
290
291         case DEMUX_GET_FPS:
292         case DEMUX_GET_META:
293         case DEMUX_HAS_UNSUPPORTED_META:
294         case DEMUX_SET_NEXT_DEMUX_TIME:
295         case DEMUX_GET_TITLE_INFO:
296         case DEMUX_SET_GROUP:
297         case DEMUX_GET_ATTACHMENTS:
298         case DEMUX_CAN_RECORD:
299         case DEMUX_SET_RECORD_STATE:
300             return VLC_EGENERIC;
301
302         default:
303             msg_Err( s, "unknown query in demux_vaControlDefault" );
304             return VLC_EGENERIC;
305     }
306 }
307
308 /****************************************************************************
309  * Utility functions
310  ****************************************************************************/
311 decoder_t *demux_PacketizerNew( demux_t *p_demux, es_format_t *p_fmt, const char *psz_msg )
312 {
313     decoder_t *p_packetizer;
314     p_packetizer = vlc_custom_create( p_demux, sizeof( *p_packetizer ),
315                                       VLC_OBJECT_GENERIC, "demux packetizer" );
316     if( !p_packetizer )
317     {
318         es_format_Clean( p_fmt );
319         return NULL;
320     }
321     p_fmt->b_packetized = false;
322
323     p_packetizer->pf_decode_audio = NULL;
324     p_packetizer->pf_decode_video = NULL;
325     p_packetizer->pf_decode_sub = NULL;
326     p_packetizer->pf_packetize = NULL;
327
328     p_packetizer->fmt_in = *p_fmt;
329     es_format_Init( &p_packetizer->fmt_out, UNKNOWN_ES, 0 );
330
331     p_packetizer->p_module = module_need( p_packetizer, "packetizer", NULL, false );
332     if( !p_packetizer->p_module )
333     {
334         es_format_Clean( p_fmt );
335         vlc_object_release( p_packetizer );
336         msg_Err( p_demux, "cannot find packetizer for %s", psz_msg );
337         return NULL;
338     }
339
340     return p_packetizer;
341 }
342
343 void demux_PacketizerDestroy( decoder_t *p_packetizer )
344 {
345     if( p_packetizer->p_module )
346         module_unneed( p_packetizer, p_packetizer->p_module );
347     es_format_Clean( &p_packetizer->fmt_in );
348     if( p_packetizer->p_description )
349         vlc_meta_Delete( p_packetizer->p_description );
350     vlc_object_release( p_packetizer );
351 }
352
353 static bool SkipID3Tag( demux_t *p_demux )
354 {
355     const uint8_t *p_peek;
356     uint8_t version, revision;
357     int i_size;
358     int b_footer;
359
360     if( !p_demux->s )
361         return false;
362
363     /* Get 10 byte id3 header */
364     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
365         return false;
366
367     if( memcmp( p_peek, "ID3", 3 ) )
368         return false;
369
370     version = p_peek[3];
371     revision = p_peek[4];
372     b_footer = p_peek[5] & 0x10;
373     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
374
375     if( b_footer ) i_size += 10;
376     i_size += 10;
377
378     /* Skip the entire tag */
379     stream_Read( p_demux->s, NULL, i_size );
380
381     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
382              version, revision, i_size );
383     return true;
384 }
385 static bool SkipAPETag( demux_t *p_demux )
386 {
387     const uint8_t *p_peek;
388     int i_version;
389     int i_size;
390     uint32_t flags;
391
392     if( !p_demux->s )
393         return false;
394
395     /* Get 32 byte ape header */
396     if( stream_Peek( p_demux->s, &p_peek, 32 ) < 32 )
397         return false;
398
399     if( memcmp( p_peek, "APETAGEX", 8 ) )
400         return false;
401
402     i_version = GetDWLE( &p_peek[8] );
403     flags = GetDWLE( &p_peek[8+4+4] );
404     if( ( i_version != 1000 && i_version != 2000 ) || !( flags & (1<<29) ) )
405         return false;
406
407     i_size = GetDWLE( &p_peek[8+4] ) + ( (flags&(1<<30)) ? 32 : 0 );
408
409     /* Skip the entire tag */
410     stream_Read( p_demux->s, NULL, i_size );
411
412     msg_Dbg( p_demux, "AP2 v%d tag found, skipping %d bytes",
413              i_version/1000, i_size );
414     return true;
415 }
416