/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* malloc(), free() */
-#include <string.h>
-#include <vlc/vlc.h>
-#include <vlc_vout.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
-#include "vlc_filter.h"
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_memory.h>
-#include <math.h> /* exp() */
+#include <vlc_filter.h>
+#include "filter_picture.h"
+
+#include <math.h> /* exp(), sqrt() */
/*****************************************************************************
- * Local prototypes
+ * Module descriptor
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy ( vlc_object_t * );
-static picture_t *Filter( filter_t *, picture_t * );
-
#define SIGMA_TEXT N_("Gaussian's std deviation")
#define SIGMA_LONGTEXT N_( \
"Gaussian's standard deviation. The bluring will take " \
"into account pixels up to 3*sigma away in any direction.")
+#define GAUSSIAN_HELP N_("Add a blurring effect")
+
#define FILTER_PREFIX "gaussianblur-"
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-vlc_module_begin();
- set_description( _("Gaussian blur video filter") );
- set_shortname( _( "Gaussian Blur" ));
- set_capability( "video filter2", 0 );
- set_category( CAT_VIDEO );
- set_subcategory( SUBCAT_VIDEO_VFILTER );
+vlc_module_begin ()
+ set_description( N_("Gaussian blur video filter") )
+ set_shortname( N_( "Gaussian Blur" ))
+ set_help(GAUSSIAN_HELP)
+ set_capability( "video filter2", 0 )
+ set_category( CAT_VIDEO )
+ set_subcategory( SUBCAT_VIDEO_VFILTER )
add_float( FILTER_PREFIX "sigma", 2., NULL, SIGMA_TEXT, SIGMA_LONGTEXT,
- VLC_FALSE );
+ false )
- set_callbacks( Create, Destroy );
-vlc_module_end();
+ set_callbacks( Create, Destroy )
+vlc_module_end ()
-static const char *ppsz_filter_options[] = {
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static picture_t *Filter( filter_t *, picture_t * );
+
+static const char *const ppsz_filter_options[] = {
"sigma", NULL
};
+/* Comment this to use floats instead of integers (faster for bigger sigma
+ * values)
+ * For sigma = 2 ints are faster
+ * For sigma = 4 floats are faster
+ */
+#define DONT_USE_FLOATS
+
+#ifdef DONT_USE_FLOATS
+# define type_t int
+#else
+# define type_t float
+#endif
+
struct filter_sys_t
{
double f_sigma;
- int *pi_distribution;
int i_dim;
+
+ type_t *pt_distribution;
+ type_t *pt_buffer;
+ type_t *pt_scale;
};
static void gaussianblur_InitDistribution( filter_sys_t *p_sys )
{
double f_sigma = p_sys->f_sigma;
int i_dim = (int)(3.*f_sigma);
- int *pi_distribution = (int*)malloc( (2*i_dim+1) * (2*i_dim+1) * sizeof( int ) );
- int x, y;
+ type_t *pt_distribution = xmalloc( (2*i_dim+1) * sizeof( type_t ) );
+ int x;
+
for( x = -i_dim; x <= i_dim; x++ )
- for( y = -i_dim; y <= i_dim; y++ )
- pi_distribution[(i_dim+y)*(2*i_dim+1)+(i_dim+x)] =
- (int)( exp(-(x*x+y*y)/(2.*f_sigma*f_sigma))
- / (2.*M_PI*f_sigma*f_sigma) * (double)(1<<16) );
+ {
+ const float f_distribution = sqrt( exp(-(x*x)/(f_sigma*f_sigma) ) / (2.*M_PI*f_sigma*f_sigma) );
+#ifdef DONT_USE_FLOATS
+ const float f_factor = 1 << 8;
+#else
+ const float f_factor = 1;
+#endif
+
+ pt_distribution[i_dim+x] = (type_t)( f_distribution * f_factor );
+ //printf("%f\n",(float)pt_distribution[i_dim+x]);
+ }
p_sys->i_dim = i_dim;
- p_sys->pi_distribution = pi_distribution;
+ p_sys->pt_distribution = pt_distribution;
}
static int Create( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
+ if( p_filter->fmt_in.video.i_chroma != VLC_CODEC_I420
+ && p_filter->fmt_in.video.i_chroma != VLC_CODEC_J420
+ && p_filter->fmt_in.video.i_chroma != VLC_CODEC_YV12
+
+ && p_filter->fmt_in.video.i_chroma != VLC_CODEC_I422
+ && p_filter->fmt_in.video.i_chroma != VLC_CODEC_J422
+ )
+ {
+ /* We only want planar YUV 4:2:0 or 4:2:2 */
+ msg_Err( p_filter, "Unsupported input chroma (%4.4s)",
+ (char*)&(p_filter->fmt_in.video.i_chroma) );
+ return VLC_EGENERIC;
+ }
+
+ if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
+ {
+ msg_Err( p_filter, "Input and output chromas don't match" );
+ return VLC_EGENERIC;
+ }
+
p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
if( p_filter->p_sys == NULL )
- {
- msg_Err( p_filter, "out of memory" );
return VLC_ENOMEM;
- }
config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
p_filter->p_cfg );
msg_Dbg( p_filter, "gaussian distribution is %d pixels wide",
p_filter->p_sys->i_dim*2+1 );
+ p_filter->p_sys->pt_buffer = NULL;
+ p_filter->p_sys->pt_scale = NULL;
+
return VLC_SUCCESS;
}
static void Destroy( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
- free( p_filter->p_sys->pi_distribution );
+
+ free( p_filter->p_sys->pt_distribution );
+ free( p_filter->p_sys->pt_buffer );
+ free( p_filter->p_sys->pt_scale );
+
free( p_filter->p_sys );
}
picture_t *p_outpic;
filter_sys_t *p_sys = p_filter->p_sys;
int i_plane;
+ const int i_dim = p_sys->i_dim;
+ type_t *pt_buffer;
+ type_t *pt_scale;
+ const type_t *pt_distribution = p_sys->pt_distribution;
if( !p_pic ) return NULL;
- p_outpic = p_filter->pf_vout_buffer_new( p_filter );
+ p_outpic = filter_NewPicture( p_filter );
if( !p_outpic )
{
- msg_Warn( p_filter, "can't get output picture" );
- if( p_pic->pf_release )
- p_pic->pf_release( p_pic );
+ picture_Release( p_pic );
return NULL;
}
-
- for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
+ if( !p_sys->pt_buffer )
{
+ p_sys->pt_buffer = realloc_or_free( p_sys->pt_buffer,
+ p_pic->p[Y_PLANE].i_visible_lines *
+ p_pic->p[Y_PLANE].i_pitch * sizeof( type_t ) );
+ }
- uint8_t *p_in = p_pic->p[i_plane].p_pixels;
- uint8_t *p_out = p_outpic->p[i_plane].p_pixels;
-
- const int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
- const int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
- const int i_pitch = p_pic->p[i_plane].i_pitch;
-
- const int i_dim = p_sys->i_dim;
- const int i_dim2 = 2*i_dim+1;
- const int *pi_distribution = p_sys->pi_distribution;
+ pt_buffer = p_sys->pt_buffer;
+ if( !p_sys->pt_scale )
+ {
+ const int i_visible_lines = p_pic->p[Y_PLANE].i_visible_lines;
+ const int i_visible_pitch = p_pic->p[Y_PLANE].i_visible_pitch;
+ const int i_pitch = p_pic->p[Y_PLANE].i_pitch;
+ int i_col, i_line;
- int i_line, i_col;
- const int factor = i_plane ? 1 : 0;
+ p_sys->pt_scale = xmalloc( i_visible_lines * i_pitch * sizeof( type_t ) );
+ pt_scale = p_sys->pt_scale;
for( i_line = 0 ; i_line < i_visible_lines ; i_line++ )
{
- uint8_t *p_o = &p_out[i_line*i_pitch];
for( i_col = 0; i_col < i_visible_pitch ; i_col++ )
{
- int value = 0;
- int scale = 0;
int x, y;
+ type_t t_value = 0;
+
for( y = __MAX( -i_dim, -i_line );
y <= __MIN( i_dim, i_visible_lines - i_line - 1 );
y++ )
{
- const int *pi_d = &pi_distribution[(y+i_dim)*i_dim2+i_dim];
- const uint8_t *p_i = &p_in[(i_line+(y>>factor))*i_pitch+(i_col)];
for( x = __MAX( -i_dim, -i_col );
x <= __MIN( i_dim, i_visible_pitch - i_col + 1 );
x++ )
{
- const int weight = pi_d[x];
- value += weight * p_i[x>>factor];
- scale += weight;
+ t_value += pt_distribution[y+i_dim] *
+ pt_distribution[x+i_dim];
}
}
- p_o[i_col] = value / scale;
+ pt_scale[i_line*i_pitch+i_col] = t_value;
}
}
}
- p_outpic->date = p_pic->date;
- p_outpic->b_force = p_pic->b_force;
- p_outpic->i_nb_fields = p_pic->i_nb_fields;
- p_outpic->b_progressive = p_pic->b_progressive;
- p_outpic->b_top_field_first = p_pic->b_top_field_first;
+ pt_scale = p_sys->pt_scale;
+ for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
+ {
- if( p_pic->pf_release )
- p_pic->pf_release( p_pic );
+ uint8_t *p_in = p_pic->p[i_plane].p_pixels;
+ uint8_t *p_out = p_outpic->p[i_plane].p_pixels;
+
+ const int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
+ const int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
+ const int i_in_pitch = p_pic->p[i_plane].i_pitch;
+
+ int i_line, i_col;
+ const int x_factor = p_pic->p[Y_PLANE].i_visible_pitch/i_visible_pitch-1;
+ const int y_factor = p_pic->p[Y_PLANE].i_visible_lines/i_visible_lines-1;
+
+ for( i_line = 0 ; i_line < i_visible_lines ; i_line++ )
+ {
+ for( i_col = 0; i_col < i_visible_pitch ; i_col++ )
+ {
+ type_t t_value = 0;
+ int x;
+ const int c = i_line*i_in_pitch+i_col;
+ for( x = __MAX( -i_dim, -i_col*(x_factor+1) );
+ x <= __MIN( i_dim, (i_visible_pitch - i_col)*(x_factor+1) + 1 );
+ x++ )
+ {
+ t_value += pt_distribution[x+i_dim] *
+ p_in[c+(x>>x_factor)];
+ }
+ pt_buffer[c] = t_value;
+ }
+ }
+ for( i_line = 0 ; i_line < i_visible_lines ; i_line++ )
+ {
+ for( i_col = 0; i_col < i_visible_pitch ; i_col++ )
+ {
+ type_t t_value = 0;
+ int y;
+ const int c = i_line*i_in_pitch+i_col;
+ for( y = __MAX( -i_dim, (-i_line)*(y_factor+1) );
+ y <= __MIN( i_dim, (i_visible_lines - i_line)*(y_factor+1) - 1 );
+ y++ )
+ {
+ t_value += pt_distribution[y+i_dim] *
+ pt_buffer[c+(y>>y_factor)*i_in_pitch];
+ }
+
+ const type_t t_scale = pt_scale[(i_line<<y_factor)*(i_in_pitch<<x_factor)+(i_col<<x_factor)];
+ p_out[i_line * p_outpic->p[i_plane].i_pitch + i_col] = (uint8_t)(t_value / t_scale); // FIXME wouldn't it be better to round instead of trunc ?
+ }
+ }
+ }
- return p_outpic;
+ return CopyInfoAndRelease( p_outpic, p_pic );
}
projects / vlc / blobdiff