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vlc/modules/access/cdda.c

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/*****************************************************************************
* cdda.c : CD digital audio input module for vlc
*****************************************************************************
* Copyright (C) 2000, 2003-2006, 2008-2009 VLC authors and VideoLAN
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@netcourrier.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/**
* Todo:
* - Improve CDDB support (non-blocking, ...)
* - Fix tracknumber in MRL
*/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_input.h>
#include <vlc_access.h>
#include <vlc_meta.h>
#include <vlc_charset.h> /* ToLocaleDup */
#include <vlc_codecs.h> /* For WAVEHEADER */
#include "vcd/cdrom.h" /* For CDDA_DATA_SIZE */
#ifdef HAVE_LIBCDDB
#include <cddb/cddb.h>
#include <errno.h>
#endif
/*****************************************************************************
* Module descriptior
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
vlc_module_begin ()
set_shortname( N_("Audio CD") )
set_description( N_("Audio CD input") )
set_capability( "access", 10 )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACCESS )
set_callbacks( Open, Close )
add_usage_hint( N_("[cdda:][device][@[track]]") )
add_integer( "cdda-track", 0 , NULL, NULL, true )
change_volatile ()
add_integer( "cdda-first-sector", -1, NULL, NULL, true )
change_volatile ()
add_integer( "cdda-last-sector", -1, NULL, NULL, true )
change_volatile ()
#ifdef HAVE_LIBCDDB
add_string( "cddb-server", "freedb.videolan.org", N_( "CDDB Server" ),
N_( "Address of the CDDB server to use." ), true )
add_integer( "cddb-port", 80, N_( "CDDB port" ),
N_( "CDDB Server port to use." ), true )
change_integer_range( 1, 65535 )
#endif
add_shortcut( "cdda", "cddasimple" )
vlc_module_end ()
/* how many blocks VCDRead will read in each loop */
#define CDDA_BLOCKS_ONCE 20
#define CDDA_DATA_ONCE (CDDA_BLOCKS_ONCE * CDDA_DATA_SIZE)
/*****************************************************************************
* Access: local prototypes
*****************************************************************************/
struct access_sys_t
{
vcddev_t *vcddev; /* vcd device descriptor */
uint64_t size;
/* Current position */
int i_sector; /* Current Sector */
int *p_sectors; /* Track sectors */
/* Wave header for the output data */
WAVEHEADER waveheader;
bool b_header;
int i_track;
int i_first_sector;
int i_last_sector;
};
static block_t *Block( access_t * );
static int Seek( access_t *, uint64_t );
static int Control( access_t *, int, va_list );
static int GetTracks( access_t *p_access, input_item_t *p_current );
#ifdef HAVE_LIBCDDB
static cddb_disc_t *GetCDDBInfo( access_t *p_access, int i_titles, int *p_sectors );
#endif
/*****************************************************************************
* Open: open cdda
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
access_t *p_access = (access_t*)p_this;
access_sys_t *p_sys;
vcddev_t *vcddev;
char *psz_name;
if( !p_access->psz_filepath || !*p_access->psz_filepath )
{
/* Only when selected */
if( !p_access->psz_access || !*p_access->psz_access )
return VLC_EGENERIC;
psz_name = var_InheritString( p_this, "cd-audio" );
if( !psz_name )
return VLC_EGENERIC;
}
else psz_name = ToLocaleDup( p_access->psz_filepath );
#if defined( _WIN32 ) || defined( __OS2__ )
if( psz_name[0] && psz_name[1] == ':' &&
psz_name[2] == '\\' && psz_name[3] == '\0' ) psz_name[2] = '\0';
#endif
/* Set up p_access */
STANDARD_BLOCK_ACCESS_INIT
/* Open CDDA */
if( (vcddev = ioctl_Open( VLC_OBJECT(p_access), psz_name ) ) == NULL )
{
msg_Warn( p_access, "could not open %s", psz_name );
free( psz_name );
free( p_sys );
return VLC_EGENERIC;
}
free( psz_name );
p_sys->vcddev = vcddev;
/* Do we play a single track ? */
p_sys->i_track = var_InheritInteger( p_access, "cdda-track" ) - 1;
if( p_sys->i_track < 0 )
{
/* We only do separate items if the whole disc is requested */
input_thread_t *p_input = access_GetParentInput( p_access );
int i_ret = -1;
if( p_input )
{
input_item_t *p_current = input_GetItem( p_input );
if( p_current )
i_ret = GetTracks( p_access, p_current );
vlc_object_release( p_input );
}
if( i_ret < 0 )
goto error;
}
else
{
/* Build a WAV header for the output data */
memset( &p_sys->waveheader, 0, sizeof(WAVEHEADER) );
SetWLE( &p_sys->waveheader.Format, 1 ); /*WAVE_FORMAT_PCM*/
SetWLE( &p_sys->waveheader.BitsPerSample, 16);
p_sys->waveheader.MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
p_sys->waveheader.Length = 0; /* we just don't know */
p_sys->waveheader.ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
p_sys->waveheader.SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
SetDWLE( &p_sys->waveheader.SubChunkLength, 16);
SetWLE( &p_sys->waveheader.Modus, 2);
SetDWLE( &p_sys->waveheader.SampleFreq, 44100);
SetWLE( &p_sys->waveheader.BytesPerSample,
2 /*Modus*/ * 16 /*BitsPerSample*/ / 8 );
SetDWLE( &p_sys->waveheader.BytesPerSec,
2*16/8 /*BytesPerSample*/ * 44100 /*SampleFreq*/ );
p_sys->waveheader.DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
p_sys->waveheader.DataLength = 0; /* we just don't know */
p_sys->i_first_sector = var_InheritInteger( p_access,
"cdda-first-sector" );
p_sys->i_last_sector = var_InheritInteger( p_access,
"cdda-last-sector" );
/* Tracknumber in MRL */
if( p_sys->i_first_sector < 0 || p_sys->i_last_sector < 0 )
{
const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
p_sys->vcddev, &p_sys->p_sectors );
if( p_sys->i_track >= i_titles )
{
msg_Err( p_access, "invalid track number" );
goto error;
}
p_sys->i_first_sector = p_sys->p_sectors[p_sys->i_track];
p_sys->i_last_sector = p_sys->p_sectors[p_sys->i_track+1];
}
p_sys->i_sector = p_sys->i_first_sector;
p_sys->size = (p_sys->i_last_sector - p_sys->i_first_sector)
* (int64_t)CDDA_DATA_SIZE;
}
return VLC_SUCCESS;
error:
free( p_sys->p_sectors );
ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* Close: closes cdda
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
access_t *p_access = (access_t *)p_this;
access_sys_t *p_sys = p_access->p_sys;
free( p_sys->p_sectors );
ioctl_Close( p_this, p_sys->vcddev );
free( p_sys );
}
/*****************************************************************************
* Block: read data (CDDA_DATA_ONCE)
*****************************************************************************/
static block_t *Block( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
int i_blocks = CDDA_BLOCKS_ONCE;
block_t *p_block;
if( p_sys->i_track < 0 ) p_access->info.b_eof = true;
/* Check end of file */
if( p_access->info.b_eof ) return NULL;
if( !p_sys->b_header )
{
/* Return only the header */
p_block = block_Alloc( sizeof( WAVEHEADER ) );
memcpy( p_block->p_buffer, &p_sys->waveheader, sizeof(WAVEHEADER) );
p_sys->b_header = true;
return p_block;
}
if( p_sys->i_sector >= p_sys->i_last_sector )
{
p_access->info.b_eof = true;
return NULL;
}
/* Don't read too far */
if( p_sys->i_sector + i_blocks >= p_sys->i_last_sector )
i_blocks = p_sys->i_last_sector - p_sys->i_sector;
/* Do the actual reading */
if( !( p_block = block_Alloc( i_blocks * CDDA_DATA_SIZE ) ) )
{
msg_Err( p_access, "cannot get a new block of size: %i",
i_blocks * CDDA_DATA_SIZE );
return NULL;
}
if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
p_sys->i_sector, p_block->p_buffer, i_blocks, CDDA_TYPE ) < 0 )
{
msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
block_Release( p_block );
/* Try to skip one sector (in case of bad sectors) */
p_sys->i_sector++;
p_access->info.i_pos += CDDA_DATA_SIZE;
return NULL;
}
/* Update a few values */
p_sys->i_sector += i_blocks;
p_access->info.i_pos += p_block->i_buffer;
return p_block;
}
/****************************************************************************
* Seek
****************************************************************************/
static int Seek( access_t *p_access, uint64_t i_pos )
{
access_sys_t *p_sys = p_access->p_sys;
/* Next sector to read */
p_sys->i_sector = p_sys->i_first_sector + i_pos / CDDA_DATA_SIZE;
assert( p_sys->i_sector >= 0 );
p_access->info.i_pos = i_pos;
return VLC_SUCCESS;
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( access_t *p_access, int i_query, va_list args )
{
switch( i_query )
{
case ACCESS_CAN_SEEK:
case ACCESS_CAN_FASTSEEK:
case ACCESS_CAN_PAUSE:
case ACCESS_CAN_CONTROL_PACE:
*va_arg( args, bool* ) = true;
break;
case ACCESS_GET_SIZE:
*va_arg( args, uint64_t * ) = p_access->p_sys->size;
break;
case ACCESS_GET_PTS_DELAY:
*va_arg( args, int64_t * ) =
INT64_C(1000) * var_InheritInteger( p_access, "disc-caching" );
break;
case ACCESS_SET_PAUSE_STATE:
break;
default:
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static int GetTracks( access_t *p_access, input_item_t *p_current )
{
access_sys_t *p_sys = p_access->p_sys;
const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
p_sys->vcddev, &p_sys->p_sectors );
if( i_titles <= 0 )
{
if( i_titles < 0 )
msg_Err( p_access, "unable to count tracks" );
else if( i_titles <= 0 )
msg_Err( p_access, "no audio tracks found" );
return VLC_EGENERIC;;
}
/* */
input_item_SetName( p_current, "Audio CD" );
const char *psz_album = NULL;
const char *psz_year = NULL;
const char *psz_genre = NULL;
const char *psz_artist = NULL;
const char *psz_description = NULL;
/* Return true if the given string is not NULL and not empty */
#define NONEMPTY( psz ) ( (psz) && *(psz) )
/* If the given string is NULL or empty, fill it by the return value of 'code' */
#define ON_EMPTY( psz, code ) do { if( !NONEMPTY( psz) ) { (psz) = code; } } while(0)
/* Retreive CDDB information */
#ifdef HAVE_LIBCDDB
char psz_year_buffer[4+1];
msg_Dbg( p_access, "fetching infos with CDDB" );
cddb_disc_t *p_disc = GetCDDBInfo( p_access, i_titles, p_sys->p_sectors );
if( p_disc )
{
psz_album = cddb_disc_get_title( p_disc );
psz_genre = cddb_disc_get_genre( p_disc );
/* */
const unsigned i_year = cddb_disc_get_year( p_disc );
if( i_year > 0 )
{
psz_year = psz_year_buffer;
snprintf( psz_year_buffer, sizeof(psz_year_buffer), "%u", i_year );
}
/* Set artist only if unique */
for( int i = 0; i < i_titles; i++ )
{
cddb_track_t *t = cddb_disc_get_track( p_disc, i );
if( !t )
continue;
const char *psz_track_artist = cddb_track_get_artist( t );
if( psz_artist && psz_track_artist &&
strcmp( psz_artist, psz_track_artist ) )
{
psz_artist = NULL;
break;
}
psz_artist = psz_track_artist;
}
}
else
msg_Dbg( p_access, "GetCDDBInfo failed" );
#endif
/* CD-Text */
vlc_meta_t **pp_cd_text;
int i_cd_text;
if( ioctl_GetCdText( VLC_OBJECT(p_access), p_sys->vcddev, &pp_cd_text, &i_cd_text ) )
{
msg_Dbg( p_access, "CD-TEXT information missing" );
i_cd_text = 0;
pp_cd_text = NULL;
}
/* Retrieve CD-TEXT information but prefer CDDB */
if( i_cd_text > 0 && pp_cd_text[0] )
{
const vlc_meta_t *p_disc = pp_cd_text[0];
ON_EMPTY( psz_album, vlc_meta_Get( p_disc, vlc_meta_Album ) );
ON_EMPTY( psz_genre, vlc_meta_Get( p_disc, vlc_meta_Genre ) );
ON_EMPTY( psz_artist, vlc_meta_Get( p_disc, vlc_meta_Artist ) );
ON_EMPTY( psz_description, vlc_meta_Get( p_disc, vlc_meta_Description ) );
}
if( NONEMPTY( psz_album ) )
{
input_item_SetName( p_current, psz_album );
input_item_SetAlbum( p_current, psz_album );
}
if( NONEMPTY( psz_genre ) )
input_item_SetGenre( p_current, psz_genre );
if( NONEMPTY( psz_artist ) )
input_item_SetArtist( p_current, psz_artist );
if( NONEMPTY( psz_year ) )
input_item_SetDate( p_current, psz_year );
if( NONEMPTY( psz_description ) )
input_item_SetDescription( p_current, psz_description );
const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i_titles] - p_sys->p_sectors[0] ) *
CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
input_item_SetDuration( p_current, i_duration );
input_item_node_t *p_root = input_item_node_Create( p_current );
/* Build title table */
for( int i = 0; i < i_titles; i++ )
{
input_item_t *p_input_item;
char *psz_uri, *psz_opt, *psz_first, *psz_last;
char *psz_name;
msg_Dbg( p_access, "track[%d] start=%d", i, p_sys->p_sectors[i] );
/* */
if( asprintf( &psz_uri, "cdda://%s", p_access->psz_location ) == -1 )
psz_uri = NULL;
if( asprintf( &psz_opt, "cdda-track=%i", i+1 ) == -1 )
psz_opt = NULL;
if( asprintf( &psz_first, "cdda-first-sector=%i",p_sys->p_sectors[i] ) == -1 )
psz_first = NULL;
if( asprintf( &psz_last, "cdda-last-sector=%i", p_sys->p_sectors[i+1] ) == -1 )
psz_last = NULL;
/* Define a "default name" */
if( asprintf( &psz_name, _("Audio CD - Track %02i"), (i+1) ) == -1 )
psz_name = NULL;
/* Create playlist items */
const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i+1] - p_sys->p_sectors[i] ) *
CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
p_input_item = input_item_NewWithType( psz_uri, psz_name, 0, NULL, 0,
i_duration, ITEM_TYPE_DISC );
input_item_CopyOptions( p_current, p_input_item );
input_item_AddOption( p_input_item, psz_first, VLC_INPUT_OPTION_TRUSTED );
input_item_AddOption( p_input_item, psz_last, VLC_INPUT_OPTION_TRUSTED );
input_item_AddOption( p_input_item, psz_opt, VLC_INPUT_OPTION_TRUSTED );
const char *psz_track_title = NULL;
const char *psz_track_artist = NULL;
const char *psz_track_genre = NULL;
const char *psz_track_description = NULL;
#ifdef HAVE_LIBCDDB
/* Retreive CDDB information */
if( p_disc )
{
cddb_track_t *t = cddb_disc_get_track( p_disc, i );
if( t != NULL )
{
psz_track_title = cddb_track_get_title( t );
psz_track_artist = cddb_track_get_artist( t );
}
}
#endif
/* Retreive CD-TEXT information but prefer CDDB */
if( i+1 < i_cd_text && pp_cd_text[i+1] )
{
const vlc_meta_t *t = pp_cd_text[i+1];
ON_EMPTY( psz_track_title, vlc_meta_Get( t, vlc_meta_Title ) );
ON_EMPTY( psz_track_artist, vlc_meta_Get( t, vlc_meta_Artist ) );
ON_EMPTY( psz_track_genre, vlc_meta_Get( t, vlc_meta_Genre ) );
ON_EMPTY( psz_track_description, vlc_meta_Get( t, vlc_meta_Description ) );
}
/* */
ON_EMPTY( psz_track_artist, psz_artist );
ON_EMPTY( psz_track_genre, psz_genre );
ON_EMPTY( psz_track_description, psz_description );
/* */
if( NONEMPTY( psz_track_title ) )
{
input_item_SetName( p_input_item, psz_track_title );
input_item_SetTitle( p_input_item, psz_track_title );
}
if( NONEMPTY( psz_track_artist ) )
input_item_SetArtist( p_input_item, psz_track_artist );
if( NONEMPTY( psz_track_genre ) )
input_item_SetGenre( p_input_item, psz_track_genre );
if( NONEMPTY( psz_track_description ) )
input_item_SetDescription( p_input_item, psz_track_description );
if( NONEMPTY( psz_album ) )
input_item_SetAlbum( p_input_item, psz_album );
if( NONEMPTY( psz_year ) )
input_item_SetDate( p_input_item, psz_year );
char psz_num[3+1];
snprintf( psz_num, sizeof(psz_num), "%d", 1+i );
input_item_SetTrackNum( p_input_item, psz_num );
input_item_node_AppendItem( p_root, p_input_item );
vlc_gc_decref( p_input_item );
free( psz_uri ); free( psz_opt ); free( psz_name );
free( psz_first ); free( psz_last );
}
#undef ON_EMPTY
#undef NONEMPTY
input_item_node_PostAndDelete( p_root );
/* */
for( int i = 0; i < i_cd_text; i++ )
{
vlc_meta_t *p_meta = pp_cd_text[i];
if( !p_meta )
continue;
vlc_meta_Delete( p_meta );
}
free( pp_cd_text );
#ifdef HAVE_LIBCDDB
if( p_disc )
cddb_disc_destroy( p_disc );
#endif
return VLC_SUCCESS;
}
#ifdef HAVE_LIBCDDB
static cddb_disc_t *GetCDDBInfo( access_t *p_access, int i_titles, int *p_sectors )
{
if( var_InheritInteger( p_access, "album-art" ) != ALBUM_ART_ALL &&
! var_InheritBool( p_access, "metadata-network-access" ) )
{
msg_Dbg( p_access, "Album art policy set to manual; no automatic fetching" );
return NULL;
}
/* */
cddb_conn_t *p_cddb = cddb_new();
if( !p_cddb )
{
msg_Warn( p_access, "unable to use CDDB" );
return NULL;
}
/* */
cddb_http_enable( p_cddb );
char *psz_tmp = var_InheritString( p_access, "cddb-server" );
if( psz_tmp )
{
cddb_set_server_name( p_cddb, psz_tmp );
free( psz_tmp );
}
cddb_set_server_port( p_cddb, var_InheritInteger( p_access, "cddb-port" ) );
cddb_set_email_address( p_cddb, "vlc@videolan.org" );
cddb_set_http_path_query( p_cddb, "/~cddb/cddb.cgi" );
cddb_set_http_path_submit( p_cddb, "/~cddb/submit.cgi" );
char *psz_cachedir;
char *psz_temp = config_GetUserDir( VLC_CACHE_DIR );
if( asprintf( &psz_cachedir, "%s" DIR_SEP "cddb", psz_temp ) > 0 ) {
cddb_cache_enable( p_cddb );
cddb_cache_set_dir( p_cddb, psz_cachedir );
free( psz_cachedir );
}
free( psz_temp );
cddb_set_timeout( p_cddb, 10 );
/* */
cddb_disc_t *p_disc = cddb_disc_new();
if( !p_disc )
{
msg_Err( p_access, "unable to create CDDB disc structure." );
goto error;
}
int64_t i_length = 0;
for( int i = 0; i < i_titles; i++ )
{
cddb_track_t *t = cddb_track_new();
cddb_track_set_frame_offset( t, p_sectors[i] );
cddb_disc_add_track( p_disc, t );
const int64_t i_size = ( p_sectors[i+1] - p_sectors[i] ) *
(int64_t)CDDA_DATA_SIZE;
i_length += INT64_C(1000000) * i_size / 44100 / 4 ;
}
cddb_disc_set_length( p_disc, (int)(i_length/1000000) );
if( !cddb_disc_calc_discid( p_disc ) )
{
msg_Err( p_access, "CDDB disc ID calculation failed" );
goto error;
}
const int i_matches = cddb_query( p_cddb, p_disc );
if( i_matches < 0 )
{
msg_Warn( p_access, "CDDB error: %s", cddb_error_str(errno) );
goto error;
}
else if( i_matches == 0 )
{
msg_Dbg( p_access, "Couldn't find any matches in CDDB." );
goto error;
}
else if( i_matches > 1 )
msg_Warn( p_access, "found %d matches in CDDB. Using first one.", i_matches );
cddb_read( p_cddb, p_disc );
cddb_destroy( p_cddb);
return p_disc;
error:
if( p_disc )
cddb_disc_destroy( p_disc );
cddb_destroy( p_cddb );
return NULL;
}
#endif /*HAVE_LIBCDDB*/