visual.c
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上传日期:2009-03-27
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文件大小:12k
- /*****************************************************************************
- * visual.c : Visualisation system
- *****************************************************************************
- * Copyright (C) 2002 VideoLAN
- * $Id: visual.c 8551 2004-08-28 17:36:02Z gbazin $
- *
- * Authors: Cl閙ent Stenac <zorglub@via.ecp.fr>
- *
- * 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 <stdlib.h> /* malloc(), free() */
- #include <vlc/vlc.h>
- #include <vlc/vout.h>
- #include "audio_output.h"
- #include "aout_internal.h"
- #include "visual.h"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define ELIST_TEXT N_( "Effects list" )
- #define ELIST_LONGTEXT N_(
- "A list of visual effect, separated by commas.n"
- "Current effects include: dummy, random, scope, spectrum" )
- #define WIDTH_TEXT N_( "Video width" )
- #define WIDTH_LONGTEXT N_(
- "The width of the effects video window, in pixels." )
- #define HEIGHT_TEXT N_( "Video height" )
- #define HEIGHT_LONGTEXT N_(
- "The height of the effects video window, in pixels." )
- #define NBBANDS_TEXT N_( "Number of bands" )
- #define NBBANDS_LONGTEXT N_(
- "Number of bands used by spectrum analyzer, should be 20 or 80." )
- #define SEPAR_TEXT N_( "Band separator" )
- #define SEPAR_LONGTEXT N_(
- "Number of blank pixels between bands.")
- #define AMP_TEXT N_( "Amplification" )
- #define AMP_LONGTEXT N_(
- "This is a coefficient that modifies the height of the bands.")
- #define PEAKS_TEXT N_( "Enable peaks" )
- #define PEAKS_LONGTEXT N_(
- "Defines whether to draw peaks." )
- #define STARS_TEXT N_( "Number of stars" )
- #define STARS_LONGTEXT N_(
- "Defines the number of stars to draw with random effect." )
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- vlc_module_begin();
- set_description( _("visualizer filter") );
- add_string("effect-list", "spectrum", NULL,
- ELIST_TEXT, ELIST_LONGTEXT, VLC_TRUE );
- add_integer("effect-width",VOUT_WIDTH,NULL,
- WIDTH_TEXT, WIDTH_LONGTEXT, VLC_FALSE );
- add_integer("effect-height" , VOUT_HEIGHT , NULL,
- HEIGHT_TEXT, HEIGHT_LONGTEXT, VLC_FALSE );
- add_integer("visual-nbbands", 80, NULL,
- NBBANDS_TEXT, NBBANDS_LONGTEXT, VLC_FALSE );
- add_integer("visual-separ", 1, NULL,
- SEPAR_TEXT, SEPAR_LONGTEXT, VLC_FALSE );
- add_integer("visual-amp", 3, NULL,
- AMP_TEXT, AMP_LONGTEXT, VLC_FALSE );
- add_bool("visual-peaks", VLC_TRUE, NULL,
- PEAKS_TEXT, PEAKS_LONGTEXT, VLC_FALSE );
- add_integer("visual-stars", 200, NULL,
- STARS_TEXT, STARS_LONGTEXT, VLC_FALSE );
- set_capability( "audio filter", 0 );
- set_callbacks( Open, Close );
- add_shortcut( "visualizer");
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void DoWork( aout_instance_t *, aout_filter_t *,
- aout_buffer_t *, aout_buffer_t * );
- static int FilterCallback( vlc_object_t *, char const *,
- vlc_value_t, vlc_value_t, void * );
- static struct
- {
- char *psz_name;
- int (*pf_run)( visual_effect_t *, aout_instance_t *,
- aout_buffer_t *, picture_t *);
- } pf_effect_run[]=
- {
- { "scope", scope_Run },
- { "spectrum", spectrum_Run },
- { "random", random_Run},
- { "dummy", dummy_Run},
- { NULL, dummy_Run}
- };
- /*****************************************************************************
- * Open: open the visualizer
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- aout_filter_t *p_filter = (aout_filter_t *)p_this;
- aout_filter_sys_t *p_sys;
- vlc_value_t val;
- char *psz_effects, *psz_parser;
- if( ( p_filter->input.i_format != VLC_FOURCC('f','l','3','2') &&
- p_filter->input.i_format != VLC_FOURCC('f','i','3','2') ) )
- {
- return VLC_EGENERIC;
- }
- p_sys = p_filter->p_sys = malloc( sizeof( aout_filter_sys_t ) );
- if( p_sys == NULL )
- {
- msg_Err( p_filter, "out of memory" );
- return VLC_EGENERIC;
- }
- p_sys->i_height = config_GetInt( p_filter , "effect-height");
- p_sys->i_width = config_GetInt( p_filter , "effect-width");
- if( p_sys->i_height < 20 ) p_sys->i_height = 20;
- if( p_sys->i_width < 20 ) p_sys->i_width = 20;
- if( (p_sys->i_height % 2 ) != 0 ) p_sys->i_height--;
- if( (p_sys->i_width % 2 ) != 0 ) p_sys->i_width--;
- p_sys->i_effect = 0;
- p_sys->effect = NULL;
- /* Parse the effect list */
- var_Create( p_filter, "effect-list", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
- var_Get( p_filter, "effect-list", &val);
- psz_parser = psz_effects = strdup( val.psz_string );
- free( val.psz_string );
- msg_Dbg( p_filter , "Building list of effects" );
-
- var_AddCallback( p_filter, "effect-list", FilterCallback, NULL );
- while( psz_parser && *psz_parser != ' ' )
- {
- visual_effect_t *p_effect;
- int i;
- p_effect = malloc( sizeof( visual_effect_t ) );
- p_effect->i_width = p_sys->i_width;
- p_effect->i_height= p_sys->i_height;
- p_effect->i_nb_chans = aout_FormatNbChannels( &p_filter->input);
- p_effect->psz_args = NULL;
- p_effect->p_data = NULL;
- p_effect->pf_run = NULL;
- p_effect->psz_name = NULL;
- for( i = 0; pf_effect_run[i].psz_name != NULL; i++ )
- {
- if( !strncasecmp( psz_parser,
- pf_effect_run[i].psz_name,
- strlen( pf_effect_run[i].psz_name ) ) )
- {
- p_effect->pf_run = pf_effect_run[i].pf_run;
- p_effect->psz_name = strdup( pf_effect_run[i].psz_name );
- break;
- }
- }
- if( p_effect->psz_name )
- {
- psz_parser += strlen( p_effect->psz_name );
- if( *psz_parser == '{' )
- {
- char *psz_eoa;
- psz_parser++;
- if( ( psz_eoa = strchr( psz_parser, '}') ) == NULL )
- {
- msg_Err( p_filter, "Unable to parse effect list. Aborting");
- break;
- }
- p_effect->psz_args =
- strndup( psz_parser, psz_eoa - psz_parser);
- }
- TAB_APPEND( p_sys->i_effect, p_sys->effect, p_effect );
- }
- else
- {
- msg_Err( p_filter, "unknown visual effect: %s", psz_parser );
- free( p_effect );
- }
- if( strchr( psz_parser, ',' ) )
- {
- psz_parser = strchr( psz_parser, ',' ) + 1;
- }
- else if( strchr( psz_parser, ':' ) )
- {
- psz_parser = strchr( psz_parser, ':' ) + 1;
- }
- else
- {
- break;
- }
- }
- if( psz_effects )
- {
- free( psz_effects );
- }
- if( !p_sys->i_effect )
- {
- msg_Err( p_filter, "no effects found" );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* Open the video output */
- p_sys->p_vout =
- vout_Request( p_filter, NULL,
- p_sys->i_width, p_sys->i_height,
- VLC_FOURCC('I','4','2','0'),
- VOUT_ASPECT_FACTOR * p_sys->i_width/p_sys->i_height );
- if( p_sys->p_vout == NULL )
- {
- msg_Err( p_filter, "no suitable vout module" );
- free( p_sys );
- return VLC_EGENERIC;
- }
- p_filter->pf_do_work = DoWork;
- p_filter->b_in_place= 1;
- msg_Dbg( p_filter,"Visualizer initialized");
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * DoWork: convert a buffer
- *****************************************************************************
- * Audio part pasted from trivial.c
- ****************************************************************************/
- static void DoWork( aout_instance_t *p_aout, aout_filter_t *p_filter,
- aout_buffer_t *p_in_buf, aout_buffer_t *p_out_buf )
- {
- aout_filter_sys_t *p_sys = p_filter->p_sys;
- picture_t *p_outpic;
- int i;
- p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
- p_out_buf->i_nb_bytes = p_in_buf->i_nb_bytes *
- aout_FormatNbChannels( &p_filter->output ) /
- aout_FormatNbChannels( &p_filter->input );
- /* First, get a new picture */
- while( ( p_outpic = vout_CreatePicture( p_sys->p_vout, 0, 0, 3 ) ) == NULL)
- {
- if( p_aout->b_die )
- {
- return;
- }
- msleep( VOUT_OUTMEM_SLEEP );
- }
- /* Blank the picture */
- for( i = 0 ; i < p_outpic->i_planes ; i++ )
- {
- memset( p_outpic->p[i].p_pixels, i > 0 ? 0x80 : 0x00,
- p_outpic->p[i].i_visible_lines * p_outpic->p[i].i_pitch );
- }
- /* We can now call our visualization effects */
- for( i = 0; i < p_sys->i_effect; i++ )
- {
- #define p_effect p_sys->effect[i]
- if( p_effect->pf_run )
- {
- p_effect->pf_run( p_effect, p_aout, p_out_buf, p_outpic );
- }
- #undef p_effect
- }
- vout_DatePicture( p_sys->p_vout, p_outpic,
- ( p_in_buf->start_date + p_in_buf->end_date ) / 2 );
- vout_DisplayPicture( p_sys->p_vout, p_outpic );
- }
- /*****************************************************************************
- * Close: close the plugin
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- aout_filter_t * p_filter = (aout_filter_t *)p_this;
- aout_filter_sys_t *p_sys = p_filter->p_sys;
- int i;
- if( p_filter->p_sys->p_vout )
- {
- vout_Request( p_filter, p_filter->p_sys->p_vout, 0, 0, 0, 0 );
- }
- /* Free the list */
- for( i = 0; i < p_sys->i_effect; i++ )
- {
- #define p_effect p_sys->effect[i]
- if( p_effect->psz_name )
- {
- free( p_effect->psz_name );
- }
- if( p_effect->psz_args )
- {
- free( p_effect->psz_args );
- }
- free( p_effect );
- #undef p_effect
- }
- if( p_sys->effect )
- {
- free( p_sys->effect );
- }
- free( p_filter->p_sys );
- }
- /*****************************************************************************
- * FilterCallback: called when changing the deinterlace method on the fly.
- *****************************************************************************/
- static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
- vlc_value_t oldval, vlc_value_t newval,
- void *p_data )
- {
- aout_filter_t *p_filter = (aout_filter_t *)p_this;
- /* restart this baby */
- msg_Dbg( p_filter, "We should restart the visual filter" );
- return VLC_SUCCESS;
- }