/***************************************************************************** * visual.c : Visualisation system ***************************************************************************** * Copyright (C) 2002 VideoLAN * $Id: visual.c,v 1.13 2004/01/26 18:45:45 gbazin Exp $ * * 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", "dummy", 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 != '\0' )    {        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);            }        }        else        {            msg_Err( p_filter, "unknown visual effect" );        }        TAB_APPEND( p_sys->i_effect, p_sys->effect, 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 );    }    /* 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_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;}