access.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:20k
- /*****************************************************************************
- * cddax.c : CD digital audio input module for vlc using libcdio
- *****************************************************************************
- * Copyright (C) 2000, 2003, 2004 VideoLAN
- * $Id: access.c 8952 2004-10-07 22:50:44Z rocky $
- *
- * Authors: Rocky Bernstein <rocky@panix.com>
- * 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 General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include "callback.h" /* FIXME - reorganize callback.h, cdda.h better */
- #include "cdda.h" /* private structures. Also #includes vlc things */
- #include "info.h" /* headers for meta info retrieval */
- #include <vlc_playlist.h> /* Has to come *after* cdda.h */
- #include "vlc_keys.h"
- #include <cdio/cdio.h>
- #include <cdio/logging.h>
- #include <cdio/cd_types.h>
- #include <stdio.h>
- /* #ifdef variables below are defined via config.h via #include vlc above. */
- #ifdef HAVE_STDLIB_H
- #include <stdlib.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h>
- #endif
- #ifdef HAVE_STRING_H
- #include <string.h>
- #endif
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- /* FIXME: This variable is a hack. Would be nice to eliminate. */
- access_t *p_cdda_input = NULL;
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static block_t *CDDAReadBlocks( access_t * p_access );
- static int CDDASeek( access_t * p_access, int64_t i_pos );
- static int CDDAControl( access_t *p_access, int i_query,
- va_list args );
- static int CDDAInit( access_t *p_access, cdda_data_t *p_cdda ) ;
- /****************************************************************************
- * Private functions
- ****************************************************************************/
- /* process messages that originate from libcdio. */
- static void
- cdio_log_handler (cdio_log_level_t level, const char message[])
- {
- cdda_data_t *p_cdda = (cdda_data_t *)p_cdda_input->p_sys;
- if( p_cdda == NULL )
- return;
- switch (level) {
- case CDIO_LOG_DEBUG:
- case CDIO_LOG_INFO:
- if (p_cdda->i_debug & INPUT_DBG_CDIO)
- msg_Dbg( p_cdda_input, message);
- break;
- case CDIO_LOG_WARN:
- msg_Warn( p_cdda_input, message);
- break;
- case CDIO_LOG_ERROR:
- case CDIO_LOG_ASSERT:
- msg_Err( p_cdda_input, message);
- break;
- default:
- msg_Warn( p_cdda_input, message,
- "The above message had unknown cdio log level",
- level);
- }
- return;
- }
- #ifdef HAVE_LIBCDDB
- /*! This routine is called by libcddb routines on error.
- Setup is done by init_input_plugin.
- */
- static void
- cddb_log_handler (cddb_log_level_t level, const char message[])
- {
- cdda_data_t *p_cdda = (cdda_data_t *)p_cdda_input->p_sys;
- switch (level) {
- case CDDB_LOG_DEBUG:
- case CDDB_LOG_INFO:
- if (!(p_cdda->i_debug & INPUT_DBG_CDDB)) return;
- /* Fall through if to warn case */
- default:
- cdio_log_handler (level, message);
- }
- }
- #endif /*HAVE_LIBCDDB*/
- /*! This routine is when xine is not fully set up (before full initialization)
- or is not around (before finalization).
- */
- static void
- uninit_log_handler (cdio_log_level_t level, const char message[])
- {
- cdda_data_t *p_cdda = NULL;
- if (p_cdda_input)
- p_cdda = (cdda_data_t *)p_cdda_input->p_sys;
- switch (level) {
- case CDIO_LOG_DEBUG:
- case CDIO_LOG_INFO:
- if (!p_cdda || !(p_cdda->i_debug & (INPUT_DBG_CDIO|INPUT_DBG_CDDB)))
- return;
- /* Fall through if to warn case */
- case CDIO_LOG_WARN:
- fprintf(stderr, "WARN: %sn", message);
- break;
- case CDIO_LOG_ERROR:
- fprintf(stderr, "ERROR: %sn", message);
- break;
- case CDIO_LOG_ASSERT:
- fprintf(stderr, "ASSERT ERROR: %sn", message);
- break;
- default:
- fprintf(stderr, "UNKNOWN ERROR: %sn%s %dn",
- message,
- "The above message had unknown cdio log level",
- level);
- }
- /* gl_default_cdio_log_handler (level, message); */
- }
- /*****************************************************************************
- * CDDAReadBlocks: reads a group of blocks from the CD-DA and returns
- * an allocated pointer to the data. NULL is returned if no data
- * read. It is also possible if we haven't read a RIFF header in which
- * case one that we creaded during Open/Initialization is returned.
- *****************************************************************************/
- static block_t *
- CDDAReadBlocks( access_t * p_access )
- {
- block_t *p_block;
- cdda_data_t *p_cdda = (cdda_data_t *) p_access->p_sys;
- int i_blocks = p_cdda->i_blocks_per_read;
- dbg_print((INPUT_DBG_CALL|INPUT_DBG_EXT|INPUT_DBG_LSN), "called %d",
- p_cdda->i_lsn);
- /* Check end of file */
- if( p_access->info.b_eof ) return NULL;
- if( !p_cdda->b_header )
- {
- /* Return only the dummy RIFF header we created in Open/Init */
- p_block = block_New( p_access, sizeof( WAVEHEADER ) );
- memcpy( p_block->p_buffer, &p_cdda->waveheader, sizeof(WAVEHEADER) );
- p_cdda->b_header = VLC_TRUE;
- return p_block;
- }
- /* Check end of track */
- while( p_cdda->i_lsn >= p_cdda->lsn[p_cdda->i_track+1] )
- {
- if( p_cdda->i_track >= p_cdda->i_first_track + p_cdda->i_titles - 1 )
- {
- p_access->info.b_eof = VLC_TRUE;
- return NULL;
- }
- p_access->info.i_update |= INPUT_UPDATE_TITLE | INPUT_UPDATE_SIZE;
- p_access->info.i_title++;
- p_access->info.i_size =
- p_cdda->p_title[p_access->info.i_title]->i_size;
- p_access->info.i_pos = 0;
- p_cdda->i_track++;
- }
- /* Possibly adjust i_blocks so we don't read past the end of a track. */
- if( p_cdda->i_lsn + i_blocks >= p_cdda->lsn[p_cdda->i_track+1] )
- {
- i_blocks = p_cdda->lsn[p_cdda->i_track+1 ] - p_cdda->i_lsn;
- }
- /* Do the actual reading */
- p_block = block_New( p_access, i_blocks * CDIO_CD_FRAMESIZE_RAW );
- if( !p_block)
- {
- msg_Err( p_access, "Cannot get a new block of size: %i",
- i_blocks * CDIO_CD_FRAMESIZE_RAW );
- return NULL;
- }
- if( cdio_read_audio_sectors( p_cdda->p_cdio, p_block->p_buffer,
- p_cdda->i_lsn, i_blocks) != 0 )
- {
- msg_Err( p_access, "could not read sector %lu",
- (long unsigned int) p_cdda->i_lsn );
- block_Release( p_block );
- /* If we had problems above, assume the problem is with
- the first sector of the read and set to skip it. In
- the future libcdio may have cdparanoia support.
- */
- p_cdda->i_lsn++;
- p_access->info.i_pos += CDIO_CD_FRAMESIZE_RAW;
- return NULL;
- }
-
- p_cdda->i_lsn += i_blocks;
- p_access->info.i_pos += p_block->i_buffer;
- return p_block;
- }
- /****************************************************************************
- * CDDASeek - change position for subsequent reads. For example, this
- * can happen if the user moves a position slider bar in a GUI.
- ****************************************************************************/
- static int
- CDDASeek( access_t * p_access, int64_t i_pos )
- {
- cdda_data_t *p_cdda = (cdda_data_t *) p_access->p_sys;
- p_cdda->i_lsn = p_cdda->lsn[p_cdda->i_track]
- + (i_pos / CDIO_CD_FRAMESIZE_RAW);
- p_access->info.i_pos = i_pos;
- dbg_print( (INPUT_DBG_CALL|INPUT_DBG_EXT|INPUT_DBG_SEEK),
- "lsn %lu, offset: %lld",
- (long unsigned int) p_cdda->i_lsn, i_pos );
- return VLC_SUCCESS;
- }
- /****************************************************************************
- * Public functions
- ****************************************************************************/
- /*****************************************************************************
- * Open: open cdda device or image file and initialize structures
- * for subsequent operations.
- *****************************************************************************/
- int
- E_(CDDAOpen)( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t*)p_this;
- char * psz_source = NULL;
- cdda_data_t *p_cdda;
- CdIo *p_cdio;
- track_t i_track = 1;
- vlc_bool_t b_single_track = false;
- int i_rc = VLC_EGENERIC;
- p_access->p_sys = NULL;
- /* Set where to log errors messages from libcdio. */
- p_cdda_input = p_access;
- /* parse the options passed in command line : */
- if( p_access->psz_path && *p_access->psz_path )
- {
- char *psz_parser = psz_source = strdup( p_access->psz_path );
- while( *psz_parser && *psz_parser != '@' )
- {
- psz_parser++;
- }
-
- if( *psz_parser == '@' )
- {
- /* Found options */
- *psz_parser = ' ';
- ++psz_parser;
-
- if ('T' == *psz_parser || 't' == *psz_parser )
- ++psz_parser;
-
- i_track = (int)strtol( psz_parser, NULL, 10 );
- i_track = i_track ? i_track : 1;
- b_single_track = true;
- }
- }
- if (!psz_source || !*psz_source)
- {
- /* No device/track given. Continue only when this plugin was
- selected */
- if( !p_this->b_force ) return VLC_EGENERIC;
- psz_source = var_CreateGetString( p_this, "cd-audio" );
- if( !psz_source || !*psz_source ) {
- /* Scan for a CD-ROM drive with a CD-DA in it. */
- char **cd_drives =
- cdio_get_devices_with_cap(NULL, CDIO_FS_AUDIO, false);
- if (NULL == cd_drives || NULL == cd_drives[0] ) {
- msg_Err( p_access,
- "libcdio couldn't find something with a CD-DA in it" );
- if (cd_drives) cdio_free_device_list(cd_drives);
- return VLC_EGENERIC;
- }
-
- psz_source = strdup(cd_drives[0]);
- cdio_free_device_list(cd_drives);
- }
- }
- cdio_log_set_handler ( cdio_log_handler );
- /* Open CDDA */
- if( !(p_cdio = cdio_open( psz_source, DRIVER_UNKNOWN )) )
- {
- msg_Warn( p_access, "could not open %s", psz_source );
- goto error2;
- }
- p_cdda = malloc( sizeof(cdda_data_t) );
- if( p_cdda == NULL )
- {
- msg_Err( p_access, "out of memory" );
- free( psz_source );
- return VLC_ENOMEM;
- }
- memset( p_cdda, 0, sizeof(cdda_data_t) );
- #ifdef HAVE_LIBCDDB
- cddb_log_set_handler ( cddb_log_handler );
- p_cdda->cddb.disc = NULL;
- p_cdda->b_cddb_enabled =
- config_GetInt( p_access, MODULE_STRING "-cddb-enabled" );
- #endif
- p_cdda->b_cdtext_enabled =
- config_GetInt( p_access, MODULE_STRING "-cdtext-enabled" );
- p_cdda->b_cdtext_prefer =
- config_GetInt( p_access, MODULE_STRING "-cdtext-prefer" );
- p_cdda->b_header = VLC_FALSE;
- p_cdda->p_cdio = p_cdio;
- p_cdda->i_titles = 0;
- p_cdda->i_track = i_track;
- p_cdda->i_debug = config_GetInt(p_this, MODULE_STRING "-debug");
- p_cdda->i_blocks_per_read
- = config_GetInt(p_this, MODULE_STRING "-blocks-per-read");
- p_cdda->p_input = vlc_object_find( p_access, VLC_OBJECT_INPUT,
- FIND_PARENT );
- if (0 == p_cdda->i_blocks_per_read)
- p_cdda->i_blocks_per_read = DEFAULT_BLOCKS_PER_READ;
-
- if ( p_cdda->i_blocks_per_read < MIN_BLOCKS_PER_READ
- || p_cdda->i_blocks_per_read > MAX_BLOCKS_PER_READ ) {
- msg_Warn( p_cdda_input,
- "Number of blocks (%d) has to be between %d and %d. "
- "Using %d.",
- p_cdda->i_blocks_per_read,
- MIN_BLOCKS_PER_READ, MAX_BLOCKS_PER_READ,
- DEFAULT_BLOCKS_PER_READ );
- p_cdda->i_blocks_per_read = DEFAULT_BLOCKS_PER_READ;
- }
- dbg_print( (INPUT_DBG_CALL|INPUT_DBG_EXT), "%s", psz_source );
- /* Set up p_access */
- p_access->pf_read = NULL;
- p_access->pf_block = CDDAReadBlocks;
- p_access->pf_control = CDDAControl;
- p_access->pf_seek = CDDASeek;
- p_access->info.i_size = 0;
- p_access->info.i_update = 0;
- p_access->info.b_eof = VLC_FALSE;
- p_access->info.i_title = 0;
- p_access->info.i_seekpoint = 0;
- p_access->p_sys = (access_sys_t *) p_cdda;
- /* We read the Table Of Content information */
- i_rc = CDDAInit( p_access, p_cdda );
- if ( VLC_SUCCESS != i_rc ) goto error;
- CDDAFixupPlaylist( p_access, p_cdda, psz_source, b_single_track );
-
- /* Build a WAV header to put in front of the output data.
- This gets sent back in the Block (read) routine.
- */
- memset( &p_cdda->waveheader, 0, sizeof(WAVEHEADER) );
- SetWLE( &p_cdda->waveheader.Format, 1 ); /*WAVE_FORMAT_PCM*/
- SetWLE( &p_cdda->waveheader.BitsPerSample, 16);
- p_cdda->waveheader.MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
- p_cdda->waveheader.Length = 0; /* we just don't know */
- p_cdda->waveheader.ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
- p_cdda->waveheader.SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
- SetDWLE( &p_cdda->waveheader.SubChunkLength, 16);
- SetWLE( &p_cdda->waveheader.Modus, 2);
- SetDWLE( &p_cdda->waveheader.SampleFreq, CDDA_FREQUENCY_SAMPLE);
- SetWLE( &p_cdda->waveheader.BytesPerSample,
- 2 /*Modus*/ * 16 /*BitsPerSample*/ / 8 );
- SetDWLE( &p_cdda->waveheader.BytesPerSec,
- 2*16/8 /*BytesPerSample*/ * CDDA_FREQUENCY_SAMPLE );
- p_cdda->waveheader.DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
- p_cdda->waveheader.DataLength = 0; /* we just don't know */
- /* PTS delay */
- var_Create( p_access, MODULE_STRING "-caching",
- VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- return VLC_SUCCESS;
- error:
- cdio_destroy( p_cdda->p_cdio );
- free( p_cdda );
- error2:
- free( psz_source );
- return i_rc;
- }
- /*****************************************************************************
- * CDDAClose: closes cdda and frees any resources associded with it.
- *****************************************************************************/
- void
- E_(CDDAClose)( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t *) p_this;
- cdda_data_t *p_cdda = (cdda_data_t *) p_access->p_sys;
- track_t i;
- dbg_print( (INPUT_DBG_CALL|INPUT_DBG_EXT), "" );
- /* Remove playlist titles */
- for( i = 0; i < p_cdda->i_titles; i++ )
- {
- vlc_input_title_Delete( p_cdda->p_title[i] );
- }
- cdio_destroy( p_cdda->p_cdio );
- cdio_log_set_handler (uninit_log_handler);
- #ifdef HAVE_LIBCDDB
- cddb_log_set_handler (uninit_log_handler);
- if (p_cdda->b_cddb_enabled)
- cddb_disc_destroy(p_cdda->cddb.disc);
- #endif
- if (p_cdda->psz_mcn) free( p_cdda->psz_mcn );
- free( p_cdda );
- p_cdda_input = NULL;
- }
- /*****************************************************************************
- * Control: The front-end or vlc engine calls here to ether get
- * information such as meta information or plugin capabilities or to
- * issue miscellaneous "set" requests.
- *****************************************************************************/
- static int CDDAControl( access_t *p_access, int i_query, va_list args )
- {
- cdda_data_t *p_cdda = (cdda_data_t *) p_access->p_sys;
- int *pi_int;
- int i;
- dbg_print( (INPUT_DBG_CALL|INPUT_DBG_EXT|INPUT_DBG_EVENT),
- "query %d", i_query );
- switch( i_query )
- {
- /* Pass back a copy of meta information that was gathered when we
- during the Open/Initialize call.
- */
- case ACCESS_GET_META:
- {
- vlc_meta_t **pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
- if ( p_cdda->p_meta ) {
- *pp_meta = vlc_meta_Duplicate( p_cdda->p_meta );
- dbg_print( INPUT_DBG_META, "%s", "Meta copied" );
- } else
- msg_Warn( p_access, "tried to copy NULL meta info" );
-
- return VLC_SUCCESS;
- }
- return VLC_EGENERIC;
- case ACCESS_CAN_SEEK:
- case ACCESS_CAN_FASTSEEK:
- case ACCESS_CAN_PAUSE:
- case ACCESS_CAN_CONTROL_PACE:
- {
- vlc_bool_t *pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
- *pb_bool = VLC_TRUE;
- break;
- }
- /* */
- case ACCESS_GET_MTU:
- pi_int = (int*)va_arg( args, int * );
- *pi_int = p_cdda-> i_blocks_per_read * CDIO_CD_FRAMESIZE_RAW;
- break;
- case ACCESS_GET_PTS_DELAY:
- {
- int64_t *pi_64 = (int64_t*)va_arg( args, int64_t * );
- *pi_64 = var_GetInteger( p_access, MODULE_STRING "-caching" )
- * MILLISECONDS_PER_SEC;
- break;
- }
- /* */
- case ACCESS_SET_PAUSE_STATE:
- break;
- case ACCESS_GET_TITLE_INFO:
- { input_title_t ***ppp_title;
- ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
- pi_int = (int*)va_arg( args, int* );
- *((int*)va_arg( args, int* )) = 1; /* Title offset */
- /* Duplicate title info */
- /*** printf("+++ i_tracks %d, i_titles %dn",
- p_cdda->i_tracks, p_cdda->i_titles); ***/
- *pi_int = p_cdda->i_titles;
- *ppp_title = malloc(sizeof( input_title_t **) * p_cdda->i_titles );
- if (!*ppp_title) return VLC_ENOMEM;
- for( i = 0; i < p_cdda->i_titles; i++ )
- {
- if ( p_cdda->p_title[i] )
- (*ppp_title)[i] =
- vlc_input_title_Duplicate( p_cdda->p_title[i] );
- }
- }
- break;
- case ACCESS_SET_TITLE:
- i = (int)va_arg( args, int );
- if( i != p_access->info.i_title )
- {
- /* Update info */
- p_access->info.i_update |=
- INPUT_UPDATE_TITLE|INPUT_UPDATE_SIZE;
- p_access->info.i_title = i;
- p_access->info.i_size = p_cdda->p_title[i]->i_size;
- p_access->info.i_pos = 0;
- /* Next sector to read */
- p_cdda->i_lsn = p_cdda->lsn[p_cdda->i_first_track+i];
- }
- break;
- case ACCESS_SET_SEEKPOINT:
- case ACCESS_SET_PRIVATE_ID_STATE:
- return VLC_EGENERIC;
- default:
- msg_Warn( p_access, "unimplemented query in control" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- CDDAInit:
- Initialize information pertaining to the CD: the number of tracks,
- first track number, LSNs for each track and the leadout. The leadout
- information is stored after the last track. The LSN array is
- 0-origin, same as p_access->info. Add first_track to get what track
- number this is on the CD. Note: libcdio uses the real track number.
- On input we assume p_cdda->p_cdio and p_cdda->i_track have been set.
- We return the VLC-type status, e.g. VLC_SUCCESS, VLC_ENOMEM, etc.
- *****************************************************************************/
- static int
- CDDAInit( access_t *p_access, cdda_data_t *p_cdda )
- {
- track_t i;
- discmode_t discmode = CDIO_DISC_MODE_NO_INFO;
- p_cdda->i_tracks = cdio_get_num_tracks(p_cdda->p_cdio);
- p_cdda->i_first_track = cdio_get_first_track_num(p_cdda->p_cdio);
- discmode = cdio_get_discmode(p_cdda->p_cdio);
- switch(discmode) {
- case CDIO_DISC_MODE_CD_DA:
- case CDIO_DISC_MODE_CD_MIXED:
- /* These are possible for CD-DA */
- break;
- default:
- /* These are not possible for CD-DA */
- msg_Err( p_access,
- "Disc seems not to be CD-DA. libcdio reports it is %s",
- discmode2str[discmode]
- );
- return VLC_EGENERIC;
- }
-
- /* Fill the lsn array with the track/sector matches.
- Note cdio_get_track_lsn when given num_tracks + 1 will return
- the leadout LSN.
- */
- for( i = 0 ; i <= p_cdda->i_tracks ; i++ )
- {
- track_t i_track = p_cdda->i_first_track + i;
- (p_cdda->lsn)[ i_track ] = cdio_get_track_lsn(p_cdda->p_cdio, i_track);
- }
- /* Set reading start LSN. */
- p_cdda->i_lsn = p_cdda->lsn[p_cdda->i_track];
- return VLC_SUCCESS;
- }