1 /*****************************************************************************
2 * cdda.c : CD digital audio input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2003 VideoLAN
5 * $Id: cdda.c,v 1.12 2004/01/25 17:31:22 gbazin Exp $
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@netcourrier.com>
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.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
31 #include <vlc/input.h>
33 #include "vcd/cdrom.h"
35 /*****************************************************************************
37 *****************************************************************************/
38 static int AccessOpen ( vlc_object_t * );
39 static void AccessClose( vlc_object_t * );
41 static int DemuxOpen ( vlc_object_t * );
42 static void DemuxClose ( vlc_object_t * );
44 #define CACHING_TEXT N_("Caching value in ms")
45 #define CACHING_LONGTEXT N_( \
46 "Allows you to modify the default caching value for cdda streams. This " \
47 "value should be set in milliseconds units." )
50 set_description( _("Audio CD input") );
52 add_integer( "cdda-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
53 CACHING_LONGTEXT, VLC_TRUE );
55 set_capability( "access", 70 );
56 set_callbacks( AccessOpen, AccessClose );
57 add_shortcut( "cdda" );
60 set_description( _("Audio CD demux") );
61 set_capability( "demux", 0 );
62 set_callbacks( DemuxOpen, DemuxClose );
63 add_shortcut( "cdda" );
67 /* how many blocks VCDRead will read in each loop */
68 #define CDDA_BLOCKS_ONCE 20
69 #define CDDA_DATA_ONCE (CDDA_BLOCKS_ONCE * CDDA_DATA_SIZE)
71 /*****************************************************************************
72 * Access: local prototypes
73 *****************************************************************************/
76 vcddev_t *vcddev; /* vcd device descriptor */
77 int i_nb_tracks; /* Nb of tracks (titles) */
78 int i_track; /* Current track */
79 int i_sector; /* Current Sector */
80 int * p_sectors; /* Track sectors */
81 vlc_bool_t b_end_of_track; /* If the end of track was reached */
85 static int Read ( input_thread_t *, byte_t *, size_t );
86 static void Seek ( input_thread_t *, off_t );
87 static int SetArea ( input_thread_t *, input_area_t * );
88 static int SetProgram( input_thread_t *, pgrm_descriptor_t * );
90 /*****************************************************************************
91 * AccessOpen: open cdda
92 *****************************************************************************/
93 static int AccessOpen( vlc_object_t *p_this )
95 input_thread_t * p_input = (input_thread_t *)p_this;
102 input_area_t * p_area;
106 /* parse the options passed in command line : */
107 psz_orig = psz_parser = psz_source = strdup( p_input->psz_name );
114 while( *psz_parser && *psz_parser != '@' )
119 if( *psz_parser == '@' )
125 i_title = (int)strtol( psz_parser, NULL, 10 );
126 i_title = i_title ? i_title : 1;
131 /* No source specified, so figure it out. */
132 if( !p_input->psz_access )
137 psz_source = config_GetPsz( p_input, "cd-audio" );
138 if( !psz_source ) return -1;
142 if( !(vcddev = ioctl_Open( p_this, psz_source )) )
144 msg_Warn( p_input, "could not open %s", psz_source );
150 p_input->p_access_data = p_sys = malloc( sizeof(access_sys_t) );
153 msg_Err( p_input, "out of memory" );
158 p_sys->vcddev = vcddev;
160 p_input->i_mtu = CDDA_DATA_ONCE;
162 /* We read the Table Of Content information */
163 p_sys->i_nb_tracks = ioctl_GetTracksMap( VLC_OBJECT(p_input),
164 p_sys->vcddev, &p_sys->p_sectors );
165 if( p_sys->i_nb_tracks < 0 )
167 msg_Err( p_input, "unable to count tracks" );
169 else if( p_sys->i_nb_tracks <= 0 )
171 msg_Err( p_input, "no audio tracks found" );
174 if( p_sys->i_nb_tracks <= 1)
176 ioctl_Close( p_this, p_sys->vcddev );
181 if( i_title >= p_sys->i_nb_tracks || i_title < 1 )
186 /* Set stream and area data */
187 vlc_mutex_lock( &p_input->stream.stream_lock );
189 /* Initialize ES structures */
190 input_InitStream( p_input, 0 );
192 /* cdda input method */
193 p_input->stream.i_method = INPUT_METHOD_CDDA;
195 p_input->stream.b_pace_control = 1;
196 p_input->stream.b_seekable = 1;
197 p_input->stream.i_mux_rate = 44100 * 4 / 50;
199 #define area p_input->stream.pp_areas
200 for( i = 1 ; i <= p_sys->i_nb_tracks ; i++ )
202 input_AddArea( p_input, i, 1 );
204 /* Absolute start offset and size */
206 (off_t)p_sys->p_sectors[i-1] * (off_t)CDDA_DATA_SIZE;
208 (off_t)(p_sys->p_sectors[i] - p_sys->p_sectors[i-1])
209 * (off_t)CDDA_DATA_SIZE;
213 p_area = p_input->stream.pp_areas[i_title];
215 SetArea( p_input, p_area );
217 vlc_mutex_unlock( &p_input->stream.stream_lock );
219 if( !p_input->psz_demux || !*p_input->psz_demux )
221 p_input->psz_demux = "cdda";
224 p_input->pf_read = Read;
225 p_input->pf_seek = Seek;
226 p_input->pf_set_area = SetArea;
227 p_input->pf_set_program = SetProgram;
229 /* Update default_pts to a suitable value for cdda access */
230 p_input->i_pts_delay = config_GetInt( p_input, "cdda-caching" ) * 1000;
235 /*****************************************************************************
236 * AccessClose: closes cdda
237 *****************************************************************************/
238 static void AccessClose( vlc_object_t *p_this )
240 input_thread_t *p_input = (input_thread_t *)p_this;
241 access_sys_t *p_sys = p_input->p_access_data;
243 ioctl_Close( p_this, p_sys->vcddev );
247 /*****************************************************************************
248 * Read: reads from the CDDA into PES packets.
249 *****************************************************************************
250 * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
252 *****************************************************************************/
253 static int Read( input_thread_t * p_input, byte_t * p_buffer,
256 access_sys_t *p_sys = p_input->p_access_data;
257 int i_blocks = i_len / CDDA_DATA_SIZE;
262 if( ioctl_ReadSectors( VLC_OBJECT(p_input), p_sys->vcddev, p_sys->i_sector,
263 p_buffer, i_blocks, CDDA_TYPE ) < 0 )
265 msg_Err( p_input, "could not read sector %d", p_sys->i_sector );
269 for( i_index = 0; i_index < i_blocks; i_index++ )
272 if( p_sys->i_sector == p_sys->p_sectors[p_sys->i_track + 1] )
274 input_area_t *p_area;
276 if ( p_sys->i_track >= p_sys->i_nb_tracks - 1 )
281 vlc_mutex_lock( &p_input->stream.stream_lock );
282 p_area = p_input->stream.pp_areas[
283 p_input->stream.p_selected_area->i_id + 1 ];
285 msg_Dbg( p_input, "new title" );
288 SetArea( p_input, p_area );
289 vlc_mutex_unlock( &p_input->stream.stream_lock );
291 i_read += CDDA_DATA_SIZE;
294 if ( i_len % CDDA_DATA_SIZE ) /* this should not happen */
296 msg_Err( p_input, "must read full sectors" );
303 /*****************************************************************************
304 * SetProgram: Does nothing since a CDDA is mono_program
305 *****************************************************************************/
306 static int SetProgram( input_thread_t * p_input,
307 pgrm_descriptor_t * p_program)
313 /*****************************************************************************
314 * SetArea: initialize input data for title x.
315 * It should be called for each user navigation request.
316 ****************************************************************************/
317 static int SetArea( input_thread_t * p_input, input_area_t * p_area )
319 access_sys_t *p_sys = p_input->p_access_data;
322 /* we can't use the interface slider until initilization is complete */
323 p_input->stream.b_seekable = 0;
325 if( p_area != p_input->stream.p_selected_area )
327 /* Change the default area */
328 p_input->stream.p_selected_area = p_area;
330 /* Change the current track */
331 p_sys->i_track = p_area->i_id - 1;
332 p_sys->i_sector = p_sys->p_sectors[p_sys->i_track];
334 /* Update the navigation variables without triggering a callback */
335 val.i_int = p_area->i_id;
336 var_Change( p_input, "title", VLC_VAR_SETVALUE, &val, NULL );
339 p_sys->i_sector = p_sys->p_sectors[p_sys->i_track];
341 p_input->stream.p_selected_area->i_tell =
342 (off_t)p_sys->i_sector * (off_t)CDDA_DATA_SIZE
343 - p_input->stream.p_selected_area->i_start;
345 /* warn interface that something has changed */
346 p_input->stream.b_seekable = 1;
347 p_input->stream.b_changed = 1;
353 /****************************************************************************
355 ****************************************************************************/
356 static void Seek( input_thread_t * p_input, off_t i_off )
358 access_sys_t * p_sys = p_input->p_access_data;
360 p_sys->i_sector = p_sys->p_sectors[p_sys->i_track]
361 + i_off / (off_t)CDDA_DATA_SIZE;
363 vlc_mutex_lock( &p_input->stream.stream_lock );
364 p_input->stream.p_selected_area->i_tell =
365 (off_t)p_sys->i_sector * (off_t)CDDA_DATA_SIZE
366 - p_input->stream.p_selected_area->i_start;
367 vlc_mutex_unlock( &p_input->stream.stream_lock );
373 /*****************************************************************************
374 * Demux: local prototypes
375 *****************************************************************************/
382 static int Demux ( input_thread_t * p_input );
384 /****************************************************************************
386 ****************************************************************************/
387 static int DemuxOpen ( vlc_object_t * p_this)
389 input_thread_t *p_input = (input_thread_t *)p_this;
394 if( p_input->stream.i_method != INPUT_METHOD_CDDA )
399 p_input->pf_demux = Demux;
400 p_input->pf_rewind = NULL;
401 p_input->pf_demux_control = demux_vaControlDefault;
402 p_input->p_demux_data = p_sys = malloc( sizeof( es_descriptor_t ) );
405 vlc_mutex_lock( &p_input->stream.stream_lock );
406 if( input_InitStream( p_input, 0 ) == -1)
408 vlc_mutex_unlock( &p_input->stream.stream_lock );
409 msg_Err( p_input, "cannot init stream" );
413 p_input->stream.i_mux_rate = 4 * 44100 / 50;
414 vlc_mutex_unlock( &p_input->stream.stream_lock );
416 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'a', 'r', 'a', 'w' ) );
417 fmt.audio.i_channels = 2;
418 fmt.audio.i_rate = 44100;
419 fmt.audio.i_bitspersample = 16;
420 fmt.audio.i_blockalign = 4;
421 fmt.i_bitrate = 4 * 44100 * 8;
423 p_sys->p_es = es_out_Add( p_input->p_es_out, &fmt );
428 /****************************************************************************
430 ****************************************************************************/
431 static void DemuxClose( vlc_object_t * p_this)
433 input_thread_t *p_input = (input_thread_t*)p_this;
434 demux_sys_t *p_sys = (demux_sys_t*)p_input->p_demux_data;
440 /****************************************************************************
442 ****************************************************************************/
443 static int Demux( input_thread_t * p_input )
445 demux_sys_t *p_sys = (demux_sys_t*)p_input->p_demux_data;
449 input_ClockManageRef( p_input,
450 p_input->stream.p_selected_program,
453 if( ( p_block = stream_Block( p_input->s, CDDA_DATA_SIZE ) ) == NULL )
459 p_block->i_pts = input_ClockGetTS( p_input,
460 p_input->stream.p_selected_program,
462 p_block->i_length = (mtime_t)90000 * (mtime_t)p_block->i_buffer/44100/4;
464 p_sys->i_pts += p_block->i_length;
466 es_out_Send( p_input->p_es_out, p_sys->p_es, p_block );