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Commit 959bd283 authored by Olivier Aubert's avatar Olivier Aubert
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svg.c: ported the code for vlc 0.8.1 (as a video filter)

parent 827129dd
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Showing with 185 additions and 171 deletions
modules/misc/svg.c
View file @ 959bd283
......@@ -33,6 +33,9 @@
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include "osd.h"
#include "vlc_block.h"
#include "vlc_filter.h"
#include <librsvg-2/librsvg/rsvg.h>
......@@ -41,17 +44,7 @@
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy ( vlc_object_t * );
static void Render ( vout_thread_t *, picture_t *,
const subpicture_t * );
static subpicture_t *AddText ( vout_thread_t *p_vout, int i_channel,
char *psz_string, text_style_t *p_style, int i_flags,
int i_hmargin, int i_vmargin, mtime_t i_start,
mtime_t i_stop );
static byte_t *svg_GetTemplate ();
static void svg_SizeCallback (int *width, int *height, gpointer data );
static void svg_RenderPicture (vout_thread_t *p_vout,
subpicture_sys_t *p_string );
static void FreeString( subpicture_t * );
static subpicture_t *RenderText( filter_t *, block_t * );
/*****************************************************************************
* Module descriptor
......@@ -61,9 +54,7 @@ static void FreeString( subpicture_t * );
#define TEMPLATE_LONGTEXT N_( "Location of a file holding a SVG template for automatic string conversion" )
vlc_module_begin();
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_TEXT );
set_capability( "text renderer", 100 );
set_capability( "text renderer", 101 );
add_shortcut( "svg" );
add_string( "svg-template-file", "", NULL, TEMPLATE_TEXT, TEMPLATE_LONGTEXT, VLC_TRUE );
set_callbacks( Create, Destroy );
......@@ -72,7 +63,7 @@ vlc_module_end();
/**
Describes a SVG string to be displayed on the video
*/
struct subpicture_sys_t
typedef struct subpicture_data_t
{
int i_width;
int i_height;
......@@ -81,18 +72,28 @@ struct subpicture_sys_t
byte_t *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 * );
/*****************************************************************************
* vout_sys_t: svg local data
* filter_sys_t: svg local data
*****************************************************************************
* This structure is part of the video output thread descriptor.
* This structure is part of the filter thread descriptor.
* It describes the svg specific properties of an output thread.
*****************************************************************************/
struct text_renderer_sys_t
struct filter_sys_t
{
/* The SVG template used to convert strings */
byte_t *psz_template;
/* Default size for rendering. Initialized to the output size. */
int i_width;
int i_height;
vlc_mutex_t *lock;
};
......@@ -103,36 +104,45 @@ struct text_renderer_sys_t
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
vout_thread_t *p_vout = ( vout_thread_t * )p_this;
filter_t *p_filter = (filter_t *)p_this;
filter_sys_t *p_sys;
/* Allocate structure */
p_vout->p_text_renderer_data = malloc( sizeof( text_renderer_sys_t ) );
if( p_vout->p_text_renderer_data == NULL )
p_sys = malloc( sizeof( filter_sys_t ) );
if( !p_sys )
{
msg_Err( p_vout, "Out of memory" );
msg_Err( p_filter, "Out of memory" );
return VLC_ENOMEM;
}
p_vout->pf_add_string = AddText;
/* Initialize psz_template */
p_vout->p_text_renderer_data->psz_template = svg_GetTemplate( p_this );
if( !p_vout->p_text_renderer_data->psz_template )
p_sys->psz_template = svg_GetTemplate( p_this );
if( !p_sys->psz_template )
{
msg_Err( p_vout, "Out of memory" );
msg_Err( p_filter, "Out of memory" );
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->p_sys = p_sys;
/* MUST call this before any RSVG funcs */
g_type_init ();
return VLC_SUCCESS;
}
static byte_t *svg_GetTemplate( vlc_object_t *p_this )
{
vout_thread_t *p_vout = ( vout_thread_t * )p_this;
filter_t *p_filter = (filter_t *)p_this;
char *psz_filename;
char *psz_template;
FILE *file;
psz_filename = config_GetPsz( p_vout, "svg-template-file" );
psz_filename = config_GetPsz( p_filter, "svg-template-file" );
if( !psz_filename || psz_filename[0] == 0 )
{
/* No filename. Use a default value. */
......@@ -161,14 +171,15 @@ static byte_t *svg_GetTemplate( vlc_object_t *p_this )
}
else
{
fprintf( stderr, "Reading %ld bytes from %s\n", (long)s.st_size, psz_filename );
msg_Dbg( p_this, "Reading %ld bytes from template %s\n", (long)s.st_size, psz_filename );
psz_template = malloc( s.st_size + 42 );
if( !psz_template )
{
msg_Err( p_vout, "Out of memory" );
msg_Err( p_filter, "Out of memory" );
return NULL;
}
memset( psz_template, 0, s.st_size + 1 );
fread( psz_template, s.st_size, 1, file );
fclose( file );
}
......@@ -194,41 +205,70 @@ static byte_t *svg_GetTemplate( vlc_object_t *p_this )
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
vout_thread_t *p_vout = ( vout_thread_t * )p_this;
free( p_vout->p_text_renderer_data->psz_template );
free( p_vout->p_text_renderer_data );
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 );
}
/*****************************************************************************
* Render: render SVG in picture
*****************************************************************************
* This function merges the previously rendered SVG subpicture into a picture
*****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic,
const subpicture_t *p_subpic )
static void Render( filter_t *p_filter, subpicture_t *p_spu,
subpicture_data_t *p_string )
{
subpicture_sys_t *p_string = p_subpic->p_sys;
guchar *pixels_in = NULL;
guchar *pixels_out = NULL;
int rowstride_in, rowstride_out;
int channels_in, channels_out;
int x, y;
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;
guchar *pixels_in = NULL;
int rowstride_in;
int channels_in;
int alpha;
picture_t *p_pic;
if( p_string->p_rendition == NULL ) {
/* Something changed ( presumably the dimensions ). Get the new
dimensions and update the pixbuf */
p_string->i_width = p_vout->output.i_width;
p_string->i_height = p_vout->output.i_height;
svg_RenderPicture( p_vout, p_string );
svg_RenderPicture( p_filter, p_string );
}
i_width = gdk_pixbuf_get_width( p_string->p_rendition );
i_height = gdk_pixbuf_get_height( p_string->p_rendition );
/* This rendering code is in no way optimized. If someone has some
time to lose to make it work faster, please do.
*/
/* Create a new subpicture region */
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 )
{
msg_Err( p_filter, "cannot allocate SPU region" );
return;
}
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;
i_pitch = p_spu->p_region->picture.Y_PITCH;
i_u_pitch = p_spu->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 );
/* FIXME: The alpha value is not taken into account. */
p_pic = &(p_spu->p_region->picture);
/* Copy the data */
/* This rendering code is in no way optimized. If someone has some time to
make it work faster or better, please do.
*/
/*
p_pixbuf->get_rowstride() is the number of bytes in a line.
......@@ -245,107 +285,78 @@ static void Render( vout_thread_t *p_vout, picture_t *p_pic,
*/
pixels_in = gdk_pixbuf_get_pixels( p_string->p_rendition );
pixels_out = p_pic->p->p_pixels;
rowstride_in = gdk_pixbuf_get_rowstride( p_string->p_rendition );
rowstride_out = p_pic->p->i_pitch;
channels_in = gdk_pixbuf_get_n_channels( p_string->p_rendition );
channels_out = p_pic->p->i_pixel_pitch;
alpha = gdk_pixbuf_get_has_alpha( p_string->p_rendition );
#define INDEX_IN( x, y ) ( y * rowstride_in + x * channels_in )
#define INDEX_OUT( x, y ) ( y * rowstride_out + x * channels_out )
#define UV_INDEX_OUT( x, y ) ( y * p_pic->p[U_PLANE].i_pitch / 2 + x * p_pic->p[U_PLANE].i_pixel_pitch / 2 )
i_width = gdk_pixbuf_get_width( p_string->p_rendition );
i_height = gdk_pixbuf_get_height( p_string->p_rendition );
/*
This crashes the plugin (if !alpha). As there is always an alpha value,
it does not matter for the moment :
switch( p_vout->output.i_chroma )
if( !alpha )
memset( p_a, 0xFF, i_pitch * p_spu->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++ )
{
/* I420 target, no scaling */
case VLC_FOURCC( 'I','4','2','0' ):
case VLC_FOURCC( 'I','Y','U','V' ):
case VLC_FOURCC( 'Y','V','1','2' ):
for( y = 0; y < i_height; y++ )
for( x = 0; x < i_width; x++ )
{
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 )];
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
V = 0.5 * r - 0.4187 * g - 0.0813 * b + 128
*/
if( (alpha && ALPHA( p_in ) > 10 ) || ( ! alpha )) {
i_out = INDEX_OUT( x, y );
p_pic->p[Y_PLANE].p_pixels[i_out] = .299 * R( p_in ) + .587 * G( p_in ) + .114 * B( p_in );
if( ( x % 2 == 0 ) && ( y % 2 == 0 ) ) {
i_uv_out = UV_INDEX_OUT( x, y );
p_pic->p[U_PLANE].p_pixels[i_uv_out] = -.1687 * R( p_in ) - .3313 * G( p_in ) + .5 * B( p_in ) + 128;
p_pic->p[V_PLANE].p_pixels[i_uv_out] = .5 * R( p_in ) - .4187 * G( p_in ) - .0813 * B( p_in ) + 128;
}
/* 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
V = 0.5 * r - 0.4187 * g - 0.0813 * 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_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;
}
}
}
break;
/* RV32 target, scaling */
case VLC_FOURCC( 'R','V','2','4' ):
case VLC_FOURCC( 'R','V','3','2' ):
for( y = 0; y < i_height; y++ )
{
for( x = 0; x < i_width; x++ )
{
guchar *p_in;
guchar *p_out;
p_in = &pixels_in[INDEX_IN( x, y )];
p_out = &pixels_out[INDEX_OUT( x, y )];
*p_out = *p_in;
*( p_out+1 ) = *( p_in+1 );
*( p_out+2 ) = *( p_in+2 );
}
}
break;
default:
msg_Err( p_vout, "unknown chroma, can't render SVG" );
break;
}
}
static void svg_SizeCallback( int *width, int *height, gpointer data )
{
subpicture_sys_t *p_string = data;
subpicture_data_t *p_string = data;
*width = p_string->i_width;
*height = p_string->i_height;
return;
}
static void svg_RenderPicture( vout_thread_t *p_vout,
subpicture_sys_t *p_string )
static void svg_RenderPicture( filter_t *p_filter,
subpicture_data_t *p_string )
{
/* 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;
GError *error = NULL;
p_handle = rsvg_handle_new();
......@@ -354,6 +365,11 @@ static void svg_RenderPicture( vout_thread_t *p_vout,
rsvg_handle_write( p_handle,
p_string->psz_text, strlen( p_string->psz_text ) + 1,
&error );
if( error != NULL )
{
msg_Err( p_filter, "Error in handle_write: %s\n", error->message );
return;
}
rsvg_handle_close( p_handle, &error );
p_string->p_rendition = rsvg_handle_get_pixbuf( p_handle );
......@@ -361,89 +377,87 @@ static void svg_RenderPicture( vout_thread_t *p_vout,
}
/**
* This function receives a SVG string and creates a subpicture for it.
* It is used as pf_add_string callback in the vout method by this module.
*/
static subpicture_t *AddText ( vout_thread_t *p_vout, int i_channel,
char *psz_string, text_style_t *p_style, int i_flags,
int i_hmargin, int i_vmargin, mtime_t i_start,
mtime_t i_stop )
static subpicture_t *RenderText( filter_t *p_filter, block_t *p_block )
{
subpicture_sys_t *p_string;
subpicture_t *p_subpic;
filter_sys_t *p_sys = p_filter->p_sys;
subpicture_t *p_subpic = NULL;
subpicture_data_t *p_string = NULL;
char *psz_string;
msg_Dbg( p_vout, "adding string \"%s\" start_date "I64Fd
" end_date" I64Fd, psz_string, i_start, i_stop );
/* 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 = vout_CreateSubPicture( p_vout, i_channel, GRAPH_CONTENT,
MEMORY_SUBPICTURE );
if( p_subpic == NULL )
{
return NULL;
}
p_subpic = p_filter->pf_sub_buffer_new( p_filter );
if( !p_subpic ) return NULL;
p_subpic->pf_render = Render;
p_subpic->pf_destroy = FreeString;
p_subpic->i_start = i_start;
p_subpic->i_stop = i_stop;
if( i_stop == 0 )
{
p_subpic->b_ephemer = VLC_TRUE;
}
else
{
p_subpic->b_ephemer = VLC_FALSE;
}
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;
// msg_Dbg( p_filter, "adding string \"%s\" start_date "I64Fd
/* Create and initialize private data for the subpicture */
p_string = malloc( sizeof( subpicture_sys_t ) );
if( p_string == NULL )
p_string = malloc( sizeof(subpicture_data_t) );
if( !p_string )
{
vout_DestroySubPicture( p_vout, p_subpic );
msg_Err( p_filter, "Out of memory" );
p_filter->pf_sub_buffer_del( p_filter, p_subpic );
return NULL;
}
p_subpic->p_sys = p_string;
/* 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 )
{
msg_Err( p_filter, "Out of memory" );
p_filter->pf_sub_buffer_del( p_filter, p_subpic );
free( p_string );
return NULL;
}
}
else
{
/* Data is text. Convert to SVG */
int length;
byte_t* psz_template = p_vout->p_text_renderer_data->psz_template;
byte_t* 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 == NULL )
if( !p_string->psz_text )
{
msg_Err( p_filter, "Out of memory" );
p_filter->pf_sub_buffer_del( p_filter, p_subpic );
free( p_string );
return NULL;
}
memset( p_string->psz_text, 0, length + 1 );
snprintf( p_string->psz_text, length, psz_template, psz_string );
}
p_string->i_width = p_vout->output.i_width;
p_string->i_height = p_vout->output.i_height;
p_string->i_chroma = p_vout->output.i_chroma;
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');
/* Render the SVG.
The input data is stored in the p_string structure,
and the function updates the p_rendition attribute. */
svg_RenderPicture( p_vout, p_string );
svg_RenderPicture( p_filter, p_string );
Render( p_filter, p_subpic, p_string );
FreeString( p_string );
block_Release( p_block );
vout_DisplaySubPicture( p_vout, p_subpic );
return p_subpic;
}
static void FreeString( subpicture_t *p_subpic )
static void FreeString( subpicture_data_t *p_string )
{
subpicture_sys_t *p_string = p_subpic->p_sys;
free( p_string->psz_text );
free( p_string->p_rendition );
free( p_string );
......
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