* goom: visual effects using goom. (Not yet enabled)

modules/visualization/goom.c

+/*****************************************************************************
+ * goom.c: based on libgoom (see http://ios.free.fr/?page=projet&quoi=1)
+ *****************************************************************************
+ * Copyright (C) 2003 VideoLAN
+ * $Id: goom.c,v 1.1 2003/08/23 17:23:45 fenrir Exp $
+ *
+ * Authors: Laurent Aimar
+ *
+ * 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 <string.h>                                              /* strdup() */
+#include <errno.h>
+
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+#include <vlc/aout.h>
+#include <vlc/vout.h>
+#include "aout_internal.h"
+
+#include "goom/goom_core.h"
+
+#define GOOM_WIDTH 160
+#define GOOM_HEIGHT 120
+#define GOOM_ASPECT (VOUT_ASPECT_FACTOR*GOOM_WIDTH/GOOM_HEIGHT)
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int  Open         ( vlc_object_t * );
+static void Close        ( vlc_object_t * );
+
+vlc_module_begin();
+    set_description( _("goom effect") );
+    set_capability( "audio filter", 0 );
+    set_callbacks( Open, Close );
+    add_shortcut( "goom" );
+vlc_module_end();
+
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+
+typedef struct
+{
+    VLC_COMMON_MEMBERS
+    vout_thread_t *p_vout;
+
+    char          *psz_title;
+
+    vlc_mutex_t   lock;
+    vlc_cond_t    wait;
+
+    mtime_t       i_pts;
+    int           i_samples;
+    int16_t       samples[2][512];
+} goom_thread_t;
+
+typedef struct aout_filter_sys_t
+{
+    goom_thread_t *p_thread;
+
+} aout_filter_sys_t;
+
+static void DoWork    ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+                        aout_buffer_t * );
+
+static void Thread    ( vlc_object_t * );
+
+static char *TitleGet( vlc_object_t * );
+
+/*****************************************************************************
+ * Open: open a scope effect plugin
+ *****************************************************************************/
+static int Open( vlc_object_t *p_this )
+{
+    aout_filter_t     *p_filter = (aout_filter_t *)p_this;
+    aout_filter_sys_t *p_sys;
+
+    if ( p_filter->input.i_format != VLC_FOURCC('f','l','3','2' )
+         || p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
+    {
+        msg_Warn( p_filter, "Bad input or output format" );
+        return -1;
+    }
+    if ( !AOUT_FMTS_SIMILAR( &p_filter->input, &p_filter->output ) )
+    {
+        msg_Warn( p_filter, "input and output formats are not similar" );
+        return -1;
+    }
+
+    p_filter->pf_do_work = DoWork;
+    p_filter->b_in_place = 1;
+
+    /* Allocate structure */
+    p_sys = p_filter->p_sys = malloc( sizeof( aout_filter_sys_t ) );
+
+    /* Create goom thread */
+    p_sys->p_thread = vlc_object_create( p_filter,
+                                         sizeof( goom_thread_t ) );
+    p_sys->p_thread->p_vout = vout_Request( p_filter, NULL,
+                                           GOOM_WIDTH, GOOM_HEIGHT,
+                                           VLC_FOURCC('R','V','3','2'),
+                                           GOOM_ASPECT );
+    if( p_sys->p_thread->p_vout == NULL )
+    {
+        msg_Err( p_filter, "no suitable vout module" );
+        vlc_object_destroy( p_sys->p_thread );
+        free( p_filter->p_sys );
+        return VLC_EGENERIC;
+    }
+    vlc_mutex_init( p_filter, &p_sys->p_thread->lock );
+    vlc_cond_init( p_filter, &p_sys->p_thread->wait );
+
+    p_sys->p_thread->i_samples = 0;
+    memset( &p_sys->p_thread->samples, 0, 512*2*2 );
+    p_sys->p_thread->psz_title = TitleGet( VLC_OBJECT( p_filter ) );
+
+    if( vlc_thread_create( p_sys->p_thread, "Goom Update Thread", Thread,
+                           VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
+    {
+        msg_Err( p_filter, "cannot lauch goom thread" );
+        vout_Destroy( p_sys->p_thread->p_vout );
+        vlc_mutex_destroy( &p_sys->p_thread->lock );
+        vlc_cond_destroy( &p_sys->p_thread->wait );
+        if( p_sys->p_thread->psz_title )
+        {
+            free( p_sys->p_thread->psz_title );
+        }
+        vlc_object_destroy( p_sys->p_thread );
+        free( p_filter->p_sys );
+        return VLC_EGENERIC;
+    }
+
+    return( 0 );
+}
+
+/*****************************************************************************
+ * Play: play a sound samples buffer
+ *****************************************************************************
+ * This function writes a buffer of i_length bytes in the socket
+ *****************************************************************************/
+static inline int16_t FloatToInt16( float f )
+{
+    if( f >= 1.0 )
+        return 32767;
+    else if( f < -1.0 )
+        return -32768;
+    else
+        return (int16_t)( f * 32768.0 );
+}
+
+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;
+
+    int16_t *p_isample;
+    float   *p_fsample = (float*)p_in_buf->p_buffer;
+    int     i_samples = 0;
+    int     i_channels = aout_FormatNbChannels( &p_filter->input );
+
+
+    p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+    p_out_buf->i_nb_bytes = p_in_buf->i_nb_bytes;
+
+    /* copy samples */
+    vlc_mutex_lock( &p_sys->p_thread->lock );
+    p_sys->p_thread->i_pts = p_in_buf->start_date;
+    if( p_sys->p_thread->i_samples >= 512 )
+    {
+        p_sys->p_thread->i_samples = 0;
+    }
+    p_isample = &p_sys->p_thread->samples[0][p_sys->p_thread->i_samples];
+
+    i_samples = __MIN( 512 - p_sys->p_thread->i_samples,
+                       (int)p_out_buf->i_nb_samples );
+    p_sys->p_thread->i_samples += i_samples;
+
+    while( i_samples > 0 )
+    {
+        p_isample[0] = FloatToInt16( p_fsample[0] );
+        if( i_channels > 1 )
+        {
+            p_isample[512] = FloatToInt16( p_fsample[1] );
+        }
+
+        p_isample++;
+        p_fsample += i_channels;
+
+        i_samples--;
+    }
+    if( p_sys->p_thread->i_samples == 512 )
+    {
+        vlc_cond_signal( &p_sys->p_thread->wait );
+    }
+    vlc_mutex_unlock( &p_sys->p_thread->lock );
+
+}
+/*****************************************************************************
+ * Thread:
+ *****************************************************************************/
+static void Thread( vlc_object_t *p_this )
+{
+    goom_thread_t *p_thread = (goom_thread_t*)p_this;
+
+    goom_init( GOOM_WIDTH, GOOM_HEIGHT, 0 );
+    goom_set_font( NULL, NULL, NULL );
+
+    while( !p_thread->b_die )
+    {
+        mtime_t   i_pts;
+        int16_t   data[2][512];
+        uint32_t  *plane;
+        picture_t *p_pic;
+
+        /* goom_update is damn slow, so just copy data and release the lock */
+        vlc_mutex_lock( &p_thread->lock );
+        vlc_cond_wait( &p_thread->wait, &p_thread->lock );
+        i_pts = p_thread->i_pts;
+        memcpy( data, p_thread->samples, 512 * 2 * 2 );
+        vlc_mutex_unlock( &p_thread->lock );
+
+        plane = goom_update( data, 0, 0.0, p_thread->psz_title, NULL );
+
+        if( p_thread->psz_title )
+        {
+            free( p_thread->psz_title );
+            p_thread->psz_title = NULL;
+        }
+        while( ( p_pic = vout_CreatePicture( p_thread->p_vout, 0, 0, 0 ) ) == NULL &&
+               !p_thread->b_die )
+        {
+            msleep( VOUT_OUTMEM_SLEEP );
+        }
+
+        if( p_thread->b_die || p_pic == NULL )
+        {
+            break;
+        }
+
+        memcpy( p_pic->p[0].p_pixels, plane, GOOM_WIDTH * GOOM_HEIGHT * 4 );
+        vout_DatePicture( p_thread->p_vout, p_pic, i_pts );
+        vout_DisplayPicture( p_thread->p_vout, p_pic );
+
+    }
+
+    goom_close();
+}
+
+
+/*****************************************************************************
+ * 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;
+
+    /* Stop Goom Thread */
+    p_sys->p_thread->b_die = VLC_TRUE;
+
+    vlc_mutex_lock( &p_sys->p_thread->lock );
+    vlc_cond_signal( &p_sys->p_thread->wait );
+    vlc_mutex_unlock( &p_sys->p_thread->lock );
+
+    vlc_thread_join( p_sys->p_thread );
+
+    /* Free data */
+    vout_Request( p_filter, p_sys->p_thread->p_vout, 0, 0, 0, 0 );
+    vlc_mutex_destroy( &p_sys->p_thread->lock );
+    vlc_cond_destroy( &p_sys->p_thread->wait );
+    vlc_object_destroy( p_sys->p_thread );
+
+    free( p_sys );
+}
+
+
+static char *TitleGet( vlc_object_t *p_this )
+{
+    input_thread_t *p_input = vlc_object_find( p_this,
+                                               VLC_OBJECT_INPUT, FIND_ANYWHERE);
+    char           *psz_title = NULL;
+
+    if( p_input )
+    {
+        char *psz = strrchr( p_input->psz_source, '/' );
+
+        if( psz )
+        {
+            psz++;
+        }
+        else
+        {
+            psz = p_input->psz_source;
+        }
+        if( psz && *psz )
+        {
+            psz_title = strdup( psz );
+        }
+        vlc_object_release( p_input );
+    }
+
+    return psz_title;
+}
+