/*****************************************************************************
* svg.c : Put SVG on the video
*****************************************************************************
- * Copyright (C) 2002, 2003 VideoLAN
- * $Id: svg.c,v 1.2 2003/07/23 17:26:56 oaubert Exp $
+ * Copyright (C) 2002, 2003 the VideoLAN team
+ * $Id$
*
* Authors: Olivier Aubert <oaubert@lisi.univ-lyon1.fr>
*
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* malloc( ), free( ) */
-#include <string.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
#include <vlc/vlc.h>
-#include <vlc/vout.h>
-#include "osd.h"
-#include "vlc_block.h"
-#include "vlc_filter.h"
-
+#include <vlc_charset.h>
+#include <vlc_vout.h>
+#include <vlc_osd.h>
+#include <vlc_block.h>
+#include <vlc_filter.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#elif defined( WIN32 ) && !defined( UNDER_CE )
+# include <io.h>
+#endif
+
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <glib-object.h> /* g_object_unref( ) */
#include <librsvg-2/librsvg/rsvg.h>
+typedef struct svg_rendition_t svg_rendition_t;
+
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy ( vlc_object_t * );
-static subpicture_t *RenderText( filter_t *, block_t * );
+static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
+ subpicture_region_t *p_region_in );
+static char *svg_GetTemplate( vlc_object_t *p_this );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define TEMPLATE_TEXT N_( "SVG template file" )
-#define TEMPLATE_LONGTEXT N_( "Location of a file holding a SVG template for automatic string conversion" )
+#define TEMPLATE_LONGTEXT N_( "Location of a file holding a SVG template "\
+ "for automatic string conversion" )
vlc_module_begin();
- set_capability( "text renderer", 101 );
+ set_category( CAT_INPUT);
+ set_category( SUBCAT_INPUT_SCODEC );
+ set_capability( "text renderer", 99 );
add_shortcut( "svg" );
add_string( "svg-template-file", "", NULL, TEMPLATE_TEXT, TEMPLATE_LONGTEXT, VLC_TRUE );
set_callbacks( Create, Destroy );
/**
Describes a SVG string to be displayed on the video
*/
-typedef struct subpicture_data_t
+struct svg_rendition_t
{
int i_width;
int i_height;
int i_chroma;
/** The SVG source associated with this subpicture */
- byte_t *psz_text;
+ char *psz_text;
/* The rendered SVG, as a GdkPixbuf */
GdkPixbuf *p_rendition;
-} subpicture_data_t;
+};
-static void Render ( filter_t *, subpicture_t *, subpicture_data_t * );
-static byte_t *svg_GetTemplate ();
-static void svg_SizeCallback (int *width, int *height, gpointer data );
-static void svg_RenderPicture (filter_t *p_filter,
- subpicture_data_t *p_string );
-static void FreeString( subpicture_data_t * );
+static int Render( filter_t *, subpicture_region_t *, svg_rendition_t *, int, int);
+static char *svg_GetTemplate ();
+static void svg_set_size( filter_t *p_filter, int width, int height );
+static void svg_SizeCallback ( int *width, int *height, gpointer data );
+static void svg_RenderPicture ( filter_t *p_filter,
+ svg_rendition_t *p_svg );
+static void FreeString( svg_rendition_t * );
/*****************************************************************************
* filter_sys_t: svg local data
struct filter_sys_t
{
/* The SVG template used to convert strings */
- byte_t *psz_template;
+ char *psz_template;
/* Default size for rendering. Initialized to the output size. */
int i_width;
int i_height;
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
- filter_t *p_filter = (filter_t *)p_this;
+ filter_t *p_filter = ( filter_t * )p_this;
filter_sys_t *p_sys;
/* Allocate structure */
p_sys = malloc( sizeof( filter_sys_t ) );
if( !p_sys )
{
- msg_Err( p_filter, "Out of memory" );
+ msg_Err( p_filter, "out of memory" );
return VLC_ENOMEM;
}
p_sys->psz_template = svg_GetTemplate( p_this );
if( !p_sys->psz_template )
{
- msg_Err( p_filter, "Out of memory" );
+ msg_Err( p_filter, "out of memory" );
+ free( p_sys );
return VLC_ENOMEM;
}
p_sys->i_width = p_filter->fmt_out.video.i_width;
p_sys->i_height = p_filter->fmt_out.video.i_height;
- p_filter->pf_render_string = RenderText;
+ p_filter->pf_render_text = RenderText;
+ p_filter->pf_render_html = NULL;
p_filter->p_sys = p_sys;
/* MUST call this before any RSVG funcs */
- g_type_init ();
+ rsvg_init( );
return VLC_SUCCESS;
}
-static byte_t *svg_GetTemplate( vlc_object_t *p_this )
+static char *svg_GetTemplate( vlc_object_t *p_this )
{
- filter_t *p_filter = (filter_t *)p_this;
+ filter_t *p_filter = ( filter_t * )p_this;
char *psz_filename;
char *psz_template;
FILE *file;
psz_filename = config_GetPsz( p_filter, "svg-template-file" );
- if( !psz_filename || psz_filename[0] == 0 )
+ if( !psz_filename || (psz_filename[0] == 0) )
{
/* No filename. Use a default value. */
psz_template = NULL;
else
{
/* Read the template */
- file = fopen( psz_filename, "rt" );
+ file = utf8_fopen( psz_filename, "rt" );
if( !file )
{
- msg_Warn( p_this, "SVG template file %s does not exist.", psz_filename );
+ msg_Warn( p_this, "SVG template file %s does not exist.",
+ psz_filename );
psz_template = NULL;
}
else
struct stat s;
int i_ret;
- i_ret = lstat( psz_filename, &s );
+ i_ret = utf8_stat( psz_filename, &s );
if( i_ret )
{
/* Problem accessing file information. Should not
psz_template = NULL;
}
else
+ if( ((signed)s.st_size) < 0 )
{
- msg_Dbg( p_this, "Reading %ld bytes from template %s\n", (long)s.st_size, psz_filename );
+ msg_Err( p_this, "SVG template too big" );
+ psz_template = NULL;
+ }
+ else
+ {
+ msg_Dbg( p_this, "reading %ld bytes from template %s",
+ (unsigned long)s.st_size, psz_filename );
- psz_template = malloc( s.st_size + 42 );
+ psz_template = malloc( ( s.st_size + 42 ) * sizeof( char ) );
if( !psz_template )
{
- msg_Err( p_filter, "Out of memory" );
+ msg_Err( p_filter, "out of memory" );
return NULL;
}
memset( psz_template, 0, s.st_size + 1 );
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
- filter_t *p_filter = (filter_t *)p_this;
+ filter_t *p_filter = ( filter_t * )p_this;
filter_sys_t *p_sys = p_filter->p_sys;
free( p_sys->psz_template );
free( p_sys );
+ rsvg_term( );
}
/*****************************************************************************
* Render: render SVG in picture
*****************************************************************************/
-static void Render( filter_t *p_filter, subpicture_t *p_spu,
- subpicture_data_t *p_string )
+static int Render( filter_t *p_filter, subpicture_region_t *p_region,
+ svg_rendition_t *p_svg, int i_width, int i_height )
{
- int i_width, i_height;
video_format_t fmt;
uint8_t *p_y, *p_u, *p_v, *p_a;
int x, y, i_pitch, i_u_pitch;
int channels_in;
int alpha;
picture_t *p_pic;
+ subpicture_region_t *p_region_tmp;
+
+ if ( p_filter->p_sys->i_width != i_width ||
+ p_filter->p_sys->i_height != i_height )
+ {
+ svg_set_size( p_filter, i_width, i_height );
+ p_svg->p_rendition = NULL;
+ }
- if( p_string->p_rendition == NULL ) {
- svg_RenderPicture( p_filter, p_string );
+ if( p_svg->p_rendition == NULL ) {
+ svg_RenderPicture( p_filter, p_svg );
+ if( ! p_svg->p_rendition )
+ {
+ msg_Err( p_filter, "Cannot render SVG" );
+ return VLC_EGENERIC;
+ }
}
- i_width = gdk_pixbuf_get_width( p_string->p_rendition );
- i_height = gdk_pixbuf_get_height( p_string->p_rendition );
+ i_width = gdk_pixbuf_get_width( p_svg->p_rendition );
+ i_height = gdk_pixbuf_get_height( p_svg->p_rendition );
/* Create a new subpicture region */
- memset( &fmt, 0, sizeof(video_format_t) );
- fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
+ memset( &fmt, 0, sizeof( video_format_t ) );
+ fmt.i_chroma = VLC_FOURCC( 'Y','U','V','A' );
fmt.i_aspect = VOUT_ASPECT_FACTOR;
fmt.i_width = fmt.i_visible_width = i_width;
fmt.i_height = fmt.i_visible_height = i_height;
fmt.i_x_offset = fmt.i_y_offset = 0;
- p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
- if( !p_spu->p_region )
+ p_region_tmp = spu_CreateRegion( p_filter, &fmt );
+ if( !p_region_tmp )
{
msg_Err( p_filter, "cannot allocate SPU region" );
- return;
+ return VLC_EGENERIC;
}
+ p_region->fmt = p_region_tmp->fmt;
+ p_region->picture = p_region_tmp->picture;
+ free( p_region_tmp );
- p_spu->p_region->i_x = p_spu->p_region->i_y = 0;
- p_y = p_spu->p_region->picture.Y_PIXELS;
- p_u = p_spu->p_region->picture.U_PIXELS;
- p_v = p_spu->p_region->picture.V_PIXELS;
- p_a = p_spu->p_region->picture.A_PIXELS;
+ p_region->i_x = p_region->i_y = 0;
+ p_y = p_region->picture.Y_PIXELS;
+ p_u = p_region->picture.U_PIXELS;
+ p_v = p_region->picture.V_PIXELS;
+ p_a = p_region->picture.A_PIXELS;
- i_pitch = p_spu->p_region->picture.Y_PITCH;
- i_u_pitch = p_spu->p_region->picture.U_PITCH;
+ i_pitch = p_region->picture.Y_PITCH;
+ i_u_pitch = p_region->picture.U_PITCH;
/* Initialize the region pixels (only the alpha will be changed later) */
- memset( p_y, 0x00, i_pitch * p_spu->p_region->fmt.i_height );
- memset( p_u, 0x80, i_u_pitch * p_spu->p_region->fmt.i_height );
- memset( p_v, 0x80, i_u_pitch * p_spu->p_region->fmt.i_height );
+ memset( p_y, 0x00, i_pitch * p_region->fmt.i_height );
+ memset( p_u, 0x80, i_u_pitch * p_region->fmt.i_height );
+ memset( p_v, 0x80, i_u_pitch * p_region->fmt.i_height );
- p_pic = &(p_spu->p_region->picture);
+ p_pic = &p_region->picture;
/* Copy the data */
blue = pixels [ n_channels * ( y*rowstride ) + x ) + 2 ];
*/
- pixels_in = gdk_pixbuf_get_pixels( p_string->p_rendition );
- rowstride_in = gdk_pixbuf_get_rowstride( p_string->p_rendition );
- channels_in = gdk_pixbuf_get_n_channels( p_string->p_rendition );
- alpha = gdk_pixbuf_get_has_alpha( p_string->p_rendition );
+ pixels_in = gdk_pixbuf_get_pixels( p_svg->p_rendition );
+ rowstride_in = gdk_pixbuf_get_rowstride( p_svg->p_rendition );
+ channels_in = gdk_pixbuf_get_n_channels( p_svg->p_rendition );
+ alpha = gdk_pixbuf_get_has_alpha( p_svg->p_rendition );
/*
This crashes the plugin (if !alpha). As there is always an alpha value,
it does not matter for the moment :
if( !alpha )
- memset( p_a, 0xFF, i_pitch * p_spu->p_region->fmt.i_height );
+ memset( p_a, 0xFF, i_pitch * p_region->fmt.i_height );
*/
-
+
#define INDEX_IN( x, y ) ( y * rowstride_in + x * channels_in )
#define INDEX_OUT( x, y ) ( y * i_pitch + x * p_pic->p[Y_PLANE].i_pixel_pitch )
-#define UV_INDEX_OUT( x, y ) ( ( y >> 1 ) * i_u_pitch + ( x >> 1) * p_pic->p[U_PLANE].i_pixel_pitch )
-
+
for( y = 0; y < i_height; y++ )
{
for( x = 0; x < i_width; x++ )
{
guchar *p_in;
int i_out;
- int i_uv_out;
-
+
p_in = &pixels_in[INDEX_IN( x, y )];
-
+
#define R( pixel ) *pixel
#define G( pixel ) *( pixel+1 )
#define B( pixel ) *( pixel+2 )
#define ALPHA( pixel ) *( pixel+3 )
-
+
/* From http://www.geocrawler.com/archives/3/8263/2001/6/0/6020594/ :
Y = 0.29900 * R + 0.58700 * G + 0.11400 * B
U = -0.1687 * r - 0.3313 * g + 0.5 * b + 128
*/
if ( alpha ) {
i_out = INDEX_OUT( x, y );
-
+
p_pic->Y_PIXELS[i_out] = .299 * R( p_in ) + .587 * G( p_in ) + .114 * B( p_in );
-
- p_pic->A_PIXELS[i_out] = ALPHA( p_in );
-
- if( ( x % 2 == 0 ) && ( y % 2 == 0 ) ) {
- i_uv_out = UV_INDEX_OUT( x, y );
+ p_pic->U_PIXELS[i_out] = -.1687 * R( p_in ) - .3313 * G( p_in ) + .5 * B( p_in ) + 128;
+ p_pic->V_PIXELS[i_out] = .5 * R( p_in ) - .4187 * G( p_in ) - .0813 * B( p_in ) + 128;
-
- p_pic->U_PIXELS[i_uv_out] = -.1687 * R( p_in ) - .3313 * G( p_in ) + .5 * B( p_in ) + 128;
- p_pic->V_PIXELS[i_uv_out] = .5 * R( p_in ) - .4187 * G( p_in ) - .0813 * B( p_in ) + 128;
- }
+ p_pic->A_PIXELS[i_out] = ALPHA( p_in );
}
}
}
+
+ return VLC_SUCCESS;
+}
+
+static void svg_set_size( filter_t *p_filter, int width, int height )
+{
+ p_filter->p_sys->i_width = width;
+ p_filter->p_sys->i_height = height;
}
static void svg_SizeCallback( int *width, int *height, gpointer data )
{
- subpicture_data_t *p_string = data;
+ filter_t *p_filter = data;
- *width = p_string->i_width;
- *height = p_string->i_height;
+ *width = p_filter->p_sys->i_width;
+ *height = p_filter->p_sys->i_height;
return;
}
static void svg_RenderPicture( filter_t *p_filter,
- subpicture_data_t *p_string )
+ svg_rendition_t *p_svg )
{
/* Render the SVG string p_string->psz_text into a new picture_t
p_string->p_rendition with dimensions ( ->i_width, ->i_height ) */
RsvgHandle *p_handle;
GError *error = NULL;
+ p_svg->p_rendition = NULL;
+
p_handle = rsvg_handle_new();
- rsvg_handle_set_size_callback( p_handle, svg_SizeCallback, p_string, NULL );
+ if( !p_handle )
+ {
+ msg_Err( p_filter, "Error creating SVG reader: %s", error->message );
+ return;
+ }
+
+ rsvg_handle_set_size_callback( p_handle, svg_SizeCallback, p_filter, NULL );
- rsvg_handle_write( p_handle,
- p_string->psz_text, strlen( p_string->psz_text ) + 1,
- &error );
- if( error != NULL )
+ if( ! rsvg_handle_write( p_handle,
+ ( guchar* )p_svg->psz_text, strlen( p_svg->psz_text ),
+ &error ) )
{
- msg_Err( p_filter, "Error in handle_write: %s\n", error->message );
+ msg_Err( p_filter, "error while rendering SVG: %s\n", error->message );
+ g_object_unref( G_OBJECT( p_handle ) );
return;
}
- rsvg_handle_close( p_handle, &error );
- p_string->p_rendition = rsvg_handle_get_pixbuf( p_handle );
- rsvg_handle_free( p_handle );
+ if( ! rsvg_handle_close( p_handle, &error ) )
+ {
+ msg_Err( p_filter, "error while rendering SVG (close): %s\n", error->message );
+ g_object_unref( G_OBJECT( p_handle ) );
+ return;
+ }
+
+ p_svg->p_rendition = rsvg_handle_get_pixbuf( p_handle );
+
+ g_object_unref( G_OBJECT( p_handle ) );
}
-static subpicture_t *RenderText( filter_t *p_filter, block_t *p_block )
+static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
+ subpicture_region_t *p_region_in )
{
filter_sys_t *p_sys = p_filter->p_sys;
- subpicture_t *p_subpic = NULL;
- subpicture_data_t *p_string = NULL;
+ svg_rendition_t *p_svg = NULL;
char *psz_string;
/* Sanity check */
- if( !p_block ) return NULL;
- psz_string = p_block->p_buffer;
- if( !psz_string || !*psz_string ) return NULL;
-
- /* Create and initialize a subpicture */
- p_subpic = p_filter->pf_sub_buffer_new( p_filter );
- if( !p_subpic ) return NULL;
-
- p_subpic->i_start = p_block->i_pts;
- p_subpic->i_stop = p_block->i_pts + p_block->i_length;
- /* Always replace rendered text when another is displayed */
- p_subpic->b_ephemer = VLC_TRUE;
- p_subpic->b_absolute = VLC_FALSE;
+ if( !p_region_in || !p_region_out ) return VLC_EGENERIC;
+ psz_string = p_region_in->psz_text;
+ if( !psz_string || !*psz_string ) return VLC_EGENERIC;
-// msg_Dbg( p_filter, "adding string \"%s\" start_date "I64Fd
-
- /* Create and initialize private data for the subpicture */
- p_string = malloc( sizeof(subpicture_data_t) );
- if( !p_string )
+ p_svg = ( svg_rendition_t * )malloc( sizeof( svg_rendition_t ) );
+ if( !p_svg )
{
- msg_Err( p_filter, "Out of memory" );
- p_filter->pf_sub_buffer_del( p_filter, p_subpic );
- return NULL;
+ msg_Err( p_filter, "out of memory" );
+ return VLC_ENOMEM;
}
+
+ p_region_out->i_x = p_region_in->i_x;
+ p_region_out->i_y = p_region_in->i_y;
+
/* Check if the data is SVG or pure text. In the latter case,
convert the text to SVG. FIXME: find a better test */
if( strstr( psz_string, "<svg" ))
{
/* Data is SVG: duplicate */
- p_string->psz_text = strdup( psz_string );
- if( !p_string->psz_text )
+ p_svg->psz_text = strdup( psz_string );
+ if( !p_svg->psz_text )
{
- msg_Err( p_filter, "Out of memory" );
- p_filter->pf_sub_buffer_del( p_filter, p_subpic );
- free( p_string );
- return NULL;
+ msg_Err( p_filter, "out of memory" );
+ free( p_svg );
+ return VLC_ENOMEM;
}
}
else
{
/* Data is text. Convert to SVG */
+ /* FIXME: handle p_style attributes */
int length;
- byte_t* psz_template = p_sys->psz_template;
+ char* psz_template = p_sys->psz_template;
length = strlen( psz_string ) + strlen( psz_template ) + 42;
- p_string->psz_text = malloc( length + 1 );
- if( !p_string->psz_text )
+ p_svg->psz_text = malloc( ( length + 1 ) * sizeof( char ) );
+ if( !p_svg->psz_text )
{
- msg_Err( p_filter, "Out of memory" );
- p_filter->pf_sub_buffer_del( p_filter, p_subpic );
- free( p_string );
- return NULL;
+ msg_Err( p_filter, "out of memory" );
+ free( p_svg );
+ return VLC_ENOMEM;
}
- memset( p_string->psz_text, 0, length + 1 );
- snprintf( p_string->psz_text, length, psz_template, psz_string );
+ memset( p_svg->psz_text, 0, length + 1 );
+ snprintf( p_svg->psz_text, length, psz_template, psz_string );
}
- p_string->i_width = p_sys->i_width;
- p_string->i_height = p_sys->i_height;
- p_string->i_chroma = VLC_FOURCC('Y','U','V','A');
+ p_svg->i_width = p_sys->i_width;
+ p_svg->i_height = p_sys->i_height;
+ p_svg->i_chroma = VLC_FOURCC( 'Y','U','V','A' );
/* Render the SVG.
The input data is stored in the p_string structure,
and the function updates the p_rendition attribute. */
- svg_RenderPicture( p_filter, p_string );
+ svg_RenderPicture( p_filter, p_svg );
- Render( p_filter, p_subpic, p_string );
- FreeString( p_string );
- block_Release( p_block );
+ Render( p_filter, p_region_out, p_svg, p_svg->i_width, p_svg->i_height );
+ FreeString( p_svg );
- return p_subpic;
+ return VLC_SUCCESS;
}
-static void FreeString( subpicture_data_t *p_string )
+static void FreeString( svg_rendition_t *p_svg )
{
- free( p_string->psz_text );
- free( p_string->p_rendition );
- free( p_string );
+ if( p_svg->psz_text )
+ free( p_svg->psz_text );
+ /* p_svg->p_rendition is a GdkPixbuf, and its allocation is
+ managed through ref. counting */
+ if( p_svg->p_rendition )
+ g_object_unref( p_svg->p_rendition );
+ free( p_svg );
}
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