]> git.sesse.net Git - vlc/blobdiff - src/video_output/vout_subpictures.c
Clean up.
[vlc] / src / video_output / vout_subpictures.c
index d9065dfe12706a26efffd275b1191d6f9b79566b..b7738627ed749516a3acad2fa2409c08658fc639 100644 (file)
 # include "config.h"
 #endif
 
-#include <vlc/vlc.h>
+#include <vlc_common.h>
 #include <vlc_vout.h>
 #include <vlc_block.h>
 #include <vlc_filter.h>
 #include <vlc_osd.h>
+#include "../libvlc.h"
+
+#include <assert.h>
 
 /*****************************************************************************
  * Local prototypes
@@ -53,10 +56,11 @@ static picture_t *spu_new_video_buffer( filter_t * );
 static void spu_del_video_buffer( filter_t *, picture_t * );
 
 static int spu_ParseChain( spu_t * );
-static void spu_DeleteChain( spu_t * );
 static int SubFilterCallback( vlc_object_t *, char const *,
                               vlc_value_t, vlc_value_t, void * );
 
+static int sub_filter_allocation_init( filter_t *, void * );
+static void sub_filter_allocation_clear( filter_t * );
 struct filter_owner_sys_t
 {
     spu_t *p_spu;
@@ -68,6 +72,7 @@ enum {
     SCALE_TEXT,
     SCALE_SIZE
 };
+
 /**
  * Creates the subpicture unit
  *
@@ -87,16 +92,19 @@ spu_t *__spu_Create( vlc_object_t *p_this )
     p_spu->p_blend = NULL;
     p_spu->p_text = NULL;
     p_spu->p_scale = NULL;
-    p_spu->i_filter = 0;
     p_spu->pf_control = spu_vaControlDefault;
 
     /* Register the default subpicture channel */
     p_spu->i_channel = 2;
 
-    vlc_mutex_init( p_this, &p_spu->subpicture_lock );
+    vlc_mutex_init( &p_spu->subpicture_lock );
 
     vlc_object_attach( p_spu, p_this );
 
+    p_spu->p_chain = filter_chain_New( p_spu, "sub filter", false,
+                                       sub_filter_allocation_init,
+                                       sub_filter_allocation_clear,
+                                       p_spu );
     return p_spu;
 }
 
@@ -124,57 +132,14 @@ int spu_Init( spu_t *p_spu )
 
 int spu_ParseChain( spu_t *p_spu )
 {
-    char *psz_parser;
-    vlc_value_t val;
-    var_Get( p_spu, "sub-filter", &val );
-    psz_parser = val.psz_string;
-
-    while( psz_parser && *psz_parser )
+    char *psz_parser = var_GetString( p_spu, "sub-filter" );
+    if( filter_chain_AppendFromString( p_spu->p_chain, psz_parser ) < 0 )
     {
-        config_chain_t *p_cfg;
-        char *psz_name;
-
-        psz_parser = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
-
-        msg_Dbg( p_spu, "adding sub-filter: %s", psz_name );
-
-        p_spu->pp_filter[p_spu->i_filter] =
-            vlc_object_create( p_spu, VLC_OBJECT_FILTER );
-        vlc_object_attach( p_spu->pp_filter[p_spu->i_filter], p_spu );
-        p_spu->pp_filter[p_spu->i_filter]->pf_sub_buffer_new = sub_new_buffer;
-        p_spu->pp_filter[p_spu->i_filter]->pf_sub_buffer_del = sub_del_buffer;
-        p_spu->pp_filter[p_spu->i_filter]->p_cfg = p_cfg;
-        p_spu->pp_filter[p_spu->i_filter]->p_module =
-            module_Need( p_spu->pp_filter[p_spu->i_filter],
-                         "sub filter", psz_name, VLC_TRUE );
-        if( p_spu->pp_filter[p_spu->i_filter]->p_module )
-        {
-            filter_owner_sys_t *p_sys = malloc( sizeof(filter_owner_sys_t) );
-            if( p_sys )
-            {
-                p_spu->pp_filter[p_spu->i_filter]->p_owner = p_sys;
-                spu_Control( p_spu, SPU_CHANNEL_REGISTER, &p_sys->i_channel );
-                p_sys->p_spu = p_spu;
-                p_spu->i_filter++;
-            }
-        }
-        else
-        {
-            msg_Dbg( p_spu, "no sub filter found" );
-            config_ChainDestroy( p_spu->pp_filter[p_spu->i_filter]->p_cfg );
-            vlc_object_detach( p_spu->pp_filter[p_spu->i_filter] );
-            vlc_object_release( p_spu->pp_filter[p_spu->i_filter] );
-        }
-
-        if( p_spu->i_filter >= 10 )
-        {
-            msg_Dbg( p_spu, "can't add anymore filters" );
-        }
-
-        free( psz_name );
+        free( psz_parser );
+        return VLC_EGENERIC;
     }
-    free( val.psz_string );
 
+    free( psz_parser );
     return VLC_SUCCESS;
 }
 
@@ -187,8 +152,6 @@ void spu_Destroy( spu_t *p_spu )
 {
     int i_index;
 
-    vlc_object_detach( p_spu );
-
     /* Destroy all remaining subpictures */
     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
     {
@@ -225,34 +188,19 @@ void spu_Destroy( spu_t *p_spu )
         vlc_object_release( p_spu->p_scale );
     }
 
-    spu_DeleteChain( p_spu );
+    filter_chain_Delete( p_spu->p_chain );
 
     vlc_mutex_destroy( &p_spu->subpicture_lock );
     vlc_object_release( p_spu );
 }
 
-static void spu_DeleteChain( spu_t *p_spu )
-{
-    if( p_spu->i_filter )
-    while( p_spu->i_filter )
-    {
-        p_spu->i_filter--;
-        module_Unneed( p_spu->pp_filter[p_spu->i_filter],
-                       p_spu->pp_filter[p_spu->i_filter]->p_module );
-        free( p_spu->pp_filter[p_spu->i_filter]->p_owner );
-        config_ChainDestroy( p_spu->pp_filter[p_spu->i_filter]->p_cfg );
-        vlc_object_detach( p_spu->pp_filter[p_spu->i_filter] );
-        vlc_object_release( p_spu->pp_filter[p_spu->i_filter] );
-    }
-}
-
 /**
  * Attach/Detach the SPU from any input
  *
  * \param p_this the object in which to destroy the subpicture unit
  * \param b_attach to select attach or detach
  */
-void spu_Attach( spu_t *p_spu, vlc_object_t *p_this, vlc_bool_t b_attach )
+void spu_Attach( spu_t *p_spu, vlc_object_t *p_this, bool b_attach )
 {
     vlc_object_t *p_input;
 
@@ -290,6 +238,7 @@ subpicture_region_t *__spu_CreateRegion( vlc_object_t *p_this,
     if( !p_region ) return NULL;
 
     memset( p_region, 0, sizeof(subpicture_region_t) );
+    p_region->i_alpha = 0xff;
     p_region->p_next = NULL;
     p_region->p_cache = NULL;
     p_region->fmt = *p_fmt;
@@ -335,6 +284,7 @@ subpicture_region_t *__spu_MakeRegion( vlc_object_t *p_this,
     (void)p_this;
     if( !p_region ) return NULL;
     memset( p_region, 0, sizeof(subpicture_region_t) );
+    p_region->i_alpha = 0xff;
     p_region->p_next = 0;
     p_region->p_cache = 0;
     p_region->fmt = *p_fmt;
@@ -444,9 +394,9 @@ subpicture_t *spu_CreateSubpicture( spu_t *p_spu )
     /* Copy subpicture information, set some default values */
     memset( p_subpic, 0, sizeof(subpicture_t) );
     p_subpic->i_status   = RESERVED_SUBPICTURE;
-    p_subpic->b_absolute = VLC_TRUE;
-    p_subpic->b_pausable = VLC_FALSE;
-    p_subpic->b_fade     = VLC_FALSE;
+    p_subpic->b_absolute = true;
+    p_subpic->b_pausable = false;
+    p_subpic->b_fade     = false;
     p_subpic->i_alpha    = 0xFF;
     p_subpic->p_region   = NULL;
     p_subpic->pf_render  = NULL;
@@ -511,6 +461,457 @@ void spu_DestroySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
  *****************************************************************************
  * This function renders all sub picture units in the list.
  *****************************************************************************/
+static void SpuRenderCreateBlend( spu_t *p_spu, vlc_fourcc_t i_chroma, int i_aspect )
+{
+    filter_t *p_blend;
+
+    assert( !p_spu->p_blend );
+
+    p_spu->p_blend =
+    p_blend        = vlc_custom_create( p_spu, sizeof(filter_t),
+                                        VLC_OBJECT_GENERIC, "blend" );
+    if( !p_blend )
+        return;
+
+    es_format_Init( &p_blend->fmt_in, VIDEO_ES, 0 );
+
+    es_format_Init( &p_blend->fmt_out, VIDEO_ES, 0 );
+    p_blend->fmt_out.video.i_x_offset = 0;
+    p_blend->fmt_out.video.i_y_offset = 0;
+    p_blend->fmt_out.video.i_chroma = i_chroma;
+    p_blend->fmt_out.video.i_aspect = i_aspect;
+
+    /* The blend module will be loaded when needed with the real
+    * input format */
+    p_blend->p_module = NULL;
+
+    /* */
+    vlc_object_attach( p_blend, p_spu );
+}
+static void SpuRenderUpdateBlend( spu_t *p_spu, int i_out_width, int i_out_height, const video_format_t *p_in_fmt )
+{
+    filter_t *p_blend = p_spu->p_blend;
+
+    assert( p_blend );
+
+    /* */
+    if( p_blend->p_module && p_blend->fmt_in.video.i_chroma != p_in_fmt->i_chroma )
+    {
+        /* The chroma is not the same, we need to reload the blend module
+         * XXX to match the old behaviour just test !p_blend->fmt_in.video.i_chroma */
+        module_Unneed( p_blend, p_blend->p_module );
+        p_blend->p_module = NULL;
+    }
+
+    /* */
+    p_blend->fmt_in.video = *p_in_fmt;
+
+    /* */
+    p_blend->fmt_out.video.i_width =
+    p_blend->fmt_out.video.i_visible_width = i_out_width;
+    p_blend->fmt_out.video.i_height =
+    p_blend->fmt_out.video.i_visible_height = i_out_height;
+
+    /* */
+    if( !p_blend->p_module )
+        p_blend->p_module = module_Need( p_blend, "video blending", 0, 0 );
+}
+static void SpuRenderCreateAndLoadText( spu_t *p_spu, int i_width, int i_height )
+{
+    filter_t *p_text;
+
+    assert( !p_spu->p_text );
+
+    p_spu->p_text =
+    p_text        = vlc_custom_create( p_spu, sizeof(filter_t),
+                                       VLC_OBJECT_GENERIC, "spu text" );
+    if( !p_text )
+        return;
+
+    es_format_Init( &p_text->fmt_in, VIDEO_ES, 0 );
+
+    es_format_Init( &p_text->fmt_out, VIDEO_ES, 0 );
+    p_text->fmt_out.video.i_width =
+    p_text->fmt_out.video.i_visible_width = i_width;
+    p_text->fmt_out.video.i_height =
+    p_text->fmt_out.video.i_visible_height = i_height;
+
+    p_text->pf_sub_buffer_new = spu_new_buffer;
+    p_text->pf_sub_buffer_del = spu_del_buffer;
+
+    vlc_object_attach( p_text, p_spu );
+
+    /* FIXME TOCHECK shouldn't module_Need( , , psz_modulename, false ) do the
+     * same than these 2 calls ? */
+    char *psz_modulename = var_CreateGetString( p_spu, "text-renderer" );
+    if( psz_modulename && *psz_modulename )
+    {
+        p_text->p_module = module_Need( p_text, "text renderer",
+                                        psz_modulename, true );
+    }
+    free( psz_modulename );
+
+    if( !p_text->p_module )
+        p_text->p_module = module_Need( p_text, "text renderer", NULL, false );
+}
+
+static void SpuRenderCreateAndLoadScale( spu_t *p_spu )
+{
+    /* FIXME: We'll also be using it for YUVA and RGBA blending ... */
+    const vlc_fourcc_t i_dummy_chroma = VLC_FOURCC('Y','U','V','P');
+
+    filter_t *p_scale;
+
+    assert( !p_spu->p_scale );
+
+    p_spu->p_scale =
+    p_scale        = vlc_custom_create( p_spu, sizeof(filter_t),
+                                        VLC_OBJECT_GENERIC, "scale" );
+    if( !p_scale )
+        return;
+
+    es_format_Init( &p_scale->fmt_in, VIDEO_ES, 0 );
+    p_scale->fmt_in.video.i_chroma = i_dummy_chroma;
+    p_scale->fmt_in.video.i_width =
+    p_scale->fmt_in.video.i_height = 32;
+
+    es_format_Init( &p_scale->fmt_out, VIDEO_ES, 0 );
+    p_scale->fmt_out.video.i_chroma = i_dummy_chroma;
+    p_scale->fmt_out.video.i_width =
+    p_scale->fmt_out.video.i_height = 16;
+
+    p_scale->pf_vout_buffer_new = spu_new_video_buffer;
+    p_scale->pf_vout_buffer_del = spu_del_video_buffer;
+
+    vlc_object_attach( p_scale, p_spu );
+    p_scale->p_module = module_Need( p_spu->p_scale, "video filter2", 0, 0 );
+}
+
+static void SpuRenderText( spu_t *p_spu, bool *pb_rerender_text,
+                           subpicture_t *p_subpic, subpicture_region_t *p_region, int i_min_scale_ratio )
+{
+    assert( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') );
+
+    if( !p_spu->p_text || !p_spu->p_text->p_module )
+        goto exit;
+
+    /* Setup 3 variables which can be used to render
+     * time-dependent text (and effects). The first indicates
+     * the total amount of time the text will be on screen,
+     * the second the amount of time it has already been on
+     * screen (can be a negative value as text is layed out
+     * before it is rendered) and the third is a feedback
+     * variable from the renderer - if the renderer sets it
+     * then this particular text is time-dependent, eg. the
+     * visual progress bar inside the text in karaoke and the
+     * text needs to be rendered multiple times in order for
+     * the effect to work - we therefore need to return the
+     * region to its original state at the end of the loop,
+     * instead of leaving it in YUVA or YUVP.
+     * Any renderer which is unaware of how to render
+     * time-dependent text can happily ignore the variables
+     * and render the text the same as usual - it should at
+     * least show up on screen, but the effect won't change
+     * the text over time.
+     */
+
+    /* FIXME why these variables are recreated every time and not
+     * when text renderer module was created ? */
+    var_Create( p_spu->p_text, "spu-duration", VLC_VAR_TIME );
+    var_Create( p_spu->p_text, "spu-elapsed", VLC_VAR_TIME );
+    var_Create( p_spu->p_text, "text-rerender", VLC_VAR_BOOL );
+    var_Create( p_spu->p_text, "scale", VLC_VAR_INTEGER );
+
+    var_SetTime( p_spu->p_text, "spu-duration", p_subpic->i_stop - p_subpic->i_start );
+    var_SetTime( p_spu->p_text, "spu-elapsed", mdate() - p_subpic->i_start );
+    var_SetBool( p_spu->p_text, "text-rerender", false );
+    var_SetInteger( p_spu->p_text, "scale", i_min_scale_ratio );
+
+    if( p_spu->p_text->pf_render_html && p_region->psz_html )
+    {
+        p_spu->p_text->pf_render_html( p_spu->p_text,
+                                       p_region, p_region );
+    }
+    else if( p_spu->p_text->pf_render_text )
+    {
+        p_spu->p_text->pf_render_text( p_spu->p_text,
+                                       p_region, p_region );
+    }
+    *pb_rerender_text = var_GetBool( p_spu->p_text, "text-rerender" );
+
+    var_Destroy( p_spu->p_text, "spu-duration" );
+    var_Destroy( p_spu->p_text, "spu-elapsed" );
+    var_Destroy( p_spu->p_text, "text-rerender" );
+    var_Destroy( p_spu->p_text, "scale" );
+
+exit:
+    p_region->i_align |= SUBPICTURE_RENDERED;
+}
+
+static void SpuRenderRegion( spu_t *p_spu,
+                             picture_t *p_pic_dst, picture_t *p_pic_src,
+                             subpicture_t *p_subpic, subpicture_region_t *p_region,
+                             const int i_scale_width_orig, const int i_scale_height_orig,
+                             const int pi_subpic_x[SCALE_SIZE],
+                             const int pi_scale_width[SCALE_SIZE],
+                             const int pi_scale_height[SCALE_SIZE],
+                             const video_format_t *p_fmt )
+{
+    video_format_t orig_fmt;
+    bool b_rerender_text;
+    int i_fade_alpha;
+    int i_x_offset;
+    int i_y_offset;
+    int i_scale_idx;
+    int i_inv_scale_x;
+    int i_inv_scale_y;
+
+    orig_fmt = p_region->fmt;
+    b_rerender_text = false;
+    if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
+    {
+        SpuRenderText( p_spu, &b_rerender_text, p_subpic, p_region, __MIN(i_scale_width_orig, i_scale_height_orig) );
+
+        /* Check if the rendering has failed ... */
+        if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
+            goto exit;
+    }
+
+    if( p_region->i_align & SUBPICTURE_RENDERED )
+    {
+        /* We are using a region which come from rendered text */
+        i_scale_idx   = SCALE_TEXT;
+        i_inv_scale_x = i_scale_width_orig;
+        i_inv_scale_y = i_scale_height_orig;
+    }
+    else
+    {
+        i_scale_idx   = SCALE_DEFAULT;
+        i_inv_scale_x = 1000;
+        i_inv_scale_y = 1000;
+    }
+
+    i_x_offset = (p_region->i_x + pi_subpic_x[ i_scale_idx ]) * i_inv_scale_x / 1000;
+    i_y_offset = (p_region->i_y + p_subpic->i_y) * i_inv_scale_y / 1000;
+
+    /* Force palette if requested */
+    if( p_spu->b_force_palette &&
+        p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
+    {
+        /* It looks so wrong I won't comment
+         * p_palette->palette is [256][4] with a int i_entries
+         * p_spu->palette is [4][4]
+         * */
+        memcpy( p_region->fmt.p_palette->palette, p_spu->palette, 16 );
+    }
+
+    if( p_spu->p_scale &&
+        ( ( pi_scale_width[i_scale_idx]  > 0 && pi_scale_width[i_scale_idx]  != 1000 ) ||
+          ( pi_scale_height[i_scale_idx] > 0 && pi_scale_height[i_scale_idx] != 1000 ) ) )
+    {
+        const int i_dst_width  = p_region->fmt.i_width  * pi_scale_width[i_scale_idx] / 1000;
+        const int i_dst_height = p_region->fmt.i_height * pi_scale_height[i_scale_idx] / 1000;
+
+        /* Destroy if cache is unusable */
+        if( p_region->p_cache )
+        {
+            if( p_region->p_cache->fmt.i_width  != i_dst_width ||
+                p_region->p_cache->fmt.i_height != i_dst_height )
+            {
+                p_subpic->pf_destroy_region( VLC_OBJECT(p_spu),
+                                             p_region->p_cache );
+                p_region->p_cache = NULL;
+            }
+        }
+
+        /* Scale if needed into cache */
+        if( !p_region->p_cache )
+        {
+            picture_t *p_pic;
+
+            p_spu->p_scale->fmt_in.video = p_region->fmt;
+            p_spu->p_scale->fmt_out.video = p_region->fmt;
+
+            p_region->p_cache =
+                p_subpic->pf_create_region( VLC_OBJECT(p_spu),
+                                            &p_spu->p_scale->fmt_out.video );
+            p_region->p_cache->p_next = p_region->p_next;
+
+            if( p_spu->p_scale->fmt_out.video.p_palette )
+                *p_spu->p_scale->fmt_out.video.p_palette =
+                    *p_region->fmt.p_palette;
+
+            vout_CopyPicture( p_spu, &p_region->p_cache->picture,
+                              &p_region->picture );
+
+            p_spu->p_scale->fmt_out.video.i_width = i_dst_width;
+            p_spu->p_scale->fmt_out.video.i_height = i_dst_height;
+
+            p_spu->p_scale->fmt_out.video.i_visible_width =
+                p_region->fmt.i_visible_width * pi_scale_width[ i_scale_idx ] / 1000;
+            p_spu->p_scale->fmt_out.video.i_visible_height =
+                p_region->fmt.i_visible_height * pi_scale_height[ i_scale_idx ] / 1000;
+
+            p_region->p_cache->fmt = p_spu->p_scale->fmt_out.video;
+            p_region->p_cache->i_x = p_region->i_x * pi_scale_width[ i_scale_idx ] / 1000;
+            p_region->p_cache->i_y = p_region->i_y * pi_scale_height[ i_scale_idx ] / 1000;
+            p_region->p_cache->i_align = p_region->i_align;
+            p_region->p_cache->i_alpha = p_region->i_alpha;
+
+            p_pic = p_spu->p_scale->pf_video_filter(
+                             p_spu->p_scale, &p_region->p_cache->picture );
+            if( p_pic )
+            {
+                p_region->p_cache->picture = *p_pic;
+                free( p_pic );
+            }
+        }
+
+        /* And the use the scale picture */
+        if( p_region->p_cache )
+            p_region = p_region->p_cache;
+    }
+
+    if( p_region->i_align & SUBPICTURE_ALIGN_BOTTOM )
+    {
+        i_y_offset = p_fmt->i_height - p_region->fmt.i_height -
+            (p_subpic->i_y + p_region->i_y) * i_inv_scale_y / 1000;
+    }
+    else if ( !(p_region->i_align & SUBPICTURE_ALIGN_TOP) )
+    {
+        i_y_offset = p_fmt->i_height / 2 - p_region->fmt.i_height / 2;
+    }
+
+    if( p_region->i_align & SUBPICTURE_ALIGN_RIGHT )
+    {
+        i_x_offset = p_fmt->i_width - p_region->fmt.i_width -
+            (pi_subpic_x[ i_scale_idx ] + p_region->i_x)
+            * i_inv_scale_x / 1000;
+    }
+    else if ( !(p_region->i_align & SUBPICTURE_ALIGN_LEFT) )
+    {
+        i_x_offset = p_fmt->i_width / 2 - p_region->fmt.i_width / 2;
+    }
+
+    if( p_subpic->b_absolute )
+    {
+        i_x_offset = (p_region->i_x +
+            pi_subpic_x[ i_scale_idx ] *
+                             pi_scale_width[ i_scale_idx ] / 1000)
+            * i_inv_scale_x / 1000;
+        i_y_offset = (p_region->i_y +
+            p_subpic->i_y * pi_scale_height[ i_scale_idx ] / 1000)
+            * i_inv_scale_y / 1000;
+
+    }
+
+    i_x_offset = __MAX( i_x_offset, 0 );
+    i_y_offset = __MAX( i_y_offset, 0 );
+
+    if( p_spu->i_margin != 0 && !p_spu->b_force_crop )
+    {
+        int i_diff = 0;
+        int i_low = (i_y_offset - p_spu->i_margin) * i_inv_scale_y / 1000;
+        int i_high = i_low + p_region->fmt.i_height;
+
+        /* crop extra margin to keep within bounds */
+        if( i_low < 0 )
+            i_diff = i_low;
+        if( i_high > (int)p_fmt->i_height )
+            i_diff = i_high - p_fmt->i_height;
+        i_y_offset -= ( p_spu->i_margin * i_inv_scale_y / 1000 + i_diff );
+    }
+
+    /* Force cropping if requested */
+    if( p_spu->b_force_crop )
+    {
+        video_format_t *p_fmt = &p_region->fmt;
+        int i_crop_x = p_spu->i_crop_x * pi_scale_width[ i_scale_idx ] / 1000
+                            * i_inv_scale_x / 1000;
+        int i_crop_y = p_spu->i_crop_y * pi_scale_height[ i_scale_idx ] / 1000
+                            * i_inv_scale_y / 1000;
+        int i_crop_width = p_spu->i_crop_width * pi_scale_width[ i_scale_idx ] / 1000
+                            * i_inv_scale_x / 1000;
+        int i_crop_height = p_spu->i_crop_height * pi_scale_height[ i_scale_idx ] / 1000
+                            * i_inv_scale_y / 1000;
+
+        /* Find the intersection */
+        if( i_crop_x + i_crop_width <= i_x_offset ||
+            i_x_offset + (int)p_fmt->i_visible_width < i_crop_x ||
+            i_crop_y + i_crop_height <= i_y_offset ||
+            i_y_offset + (int)p_fmt->i_visible_height < i_crop_y )
+        {
+            /* No intersection */
+            p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
+        }
+        else
+        {
+            int i_x, i_y, i_x_end, i_y_end;
+            i_x = __MAX( i_crop_x, i_x_offset );
+            i_y = __MAX( i_crop_y, i_y_offset );
+            i_x_end = __MIN( i_crop_x + i_crop_width,
+                           i_x_offset + (int)p_fmt->i_visible_width );
+            i_y_end = __MIN( i_crop_y + i_crop_height,
+                           i_y_offset + (int)p_fmt->i_visible_height );
+
+            p_fmt->i_x_offset = i_x - i_x_offset;
+            p_fmt->i_y_offset = i_y - i_y_offset;
+            p_fmt->i_visible_width = i_x_end - i_x;
+            p_fmt->i_visible_height = i_y_end - i_y;
+
+            i_x_offset = i_x;
+            i_y_offset = i_y;
+        }
+    }
+
+    i_x_offset = __MAX( i_x_offset, 0 );
+    i_y_offset = __MAX( i_y_offset, 0 );
+
+    /* Compute alpha blend value */
+    i_fade_alpha = 255;
+    if( p_subpic->b_fade )
+    {
+        mtime_t i_fade_start = ( p_subpic->i_stop +
+                                 p_subpic->i_start ) / 2;
+        mtime_t i_now = mdate();
+        if( i_now >= i_fade_start && p_subpic->i_stop > i_fade_start )
+        {
+            i_fade_alpha = 255 * ( p_subpic->i_stop - i_now ) /
+                           ( p_subpic->i_stop - i_fade_start );
+        }
+    }
+
+    /* Update the blender */
+    SpuRenderUpdateBlend( p_spu, p_fmt->i_width, p_fmt->i_height, &p_region->fmt );
+
+    if( p_spu->p_blend->p_module )
+    {
+        p_spu->p_blend->pf_video_blend( p_spu->p_blend, p_pic_dst,
+            p_pic_src, &p_region->picture, i_x_offset, i_y_offset,
+            i_fade_alpha * p_subpic->i_alpha * p_region->i_alpha / 65025 );
+    }
+    else
+    {
+        msg_Err( p_spu, "blending %4.4s to %4.4s failed",
+                 (char *)&p_spu->p_blend->fmt_out.video.i_chroma,
+                 (char *)&p_spu->p_blend->fmt_out.video.i_chroma );
+    }
+
+exit:
+    if( b_rerender_text )
+    {
+        /* Some forms of subtitles need to be re-rendered more than
+         * once, eg. karaoke. We therefore restore the region to its
+         * pre-rendered state, so the next time through everything is
+         * calculated again.
+         */
+        p_region->picture.pf_release( &p_region->picture );
+        memset( &p_region->picture, 0, sizeof( picture_t ) );
+        p_region->fmt = orig_fmt;
+        p_region->i_align &= ~SUBPICTURE_RENDERED;
+    }
+}
+
 void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
                             picture_t *p_pic_dst, picture_t *p_pic_src,
                             subpicture_t *p_subpic,
@@ -518,7 +919,7 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
 {
     int i_source_video_width;
     int i_source_video_height;
-    subpicture_t *p_subpic_v = p_subpic;
+    subpicture_t *p_subpic_v;
 
     /* Get lock */
     vlc_mutex_lock( &p_spu->subpicture_lock );
@@ -534,15 +935,15 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
     }
 
     if( i_scale_width_orig <= 0 )
-        i_scale_width_orig = 1;
+        i_scale_width_orig = 1000;
     if( i_scale_height_orig <= 0 )
-        i_scale_height_orig = 1;
+        i_scale_height_orig = 1000;
 
     i_source_video_width  = p_fmt->i_width  * 1000 / i_scale_width_orig;
     i_source_video_height = p_fmt->i_height * 1000 / i_scale_height_orig;
 
     /* Check i_status again to make sure spudec hasn't destroyed the subpic */
-    while( ( p_subpic != NULL ) && ( p_subpic->i_status != FREE_SUBPICTURE ) )
+    for( ; ( p_subpic != NULL ) && ( p_subpic->i_status != FREE_SUBPICTURE ); p_subpic = p_subpic->p_next )
     {
         subpicture_region_t *p_region;
         int pi_scale_width[ SCALE_SIZE ];
@@ -566,67 +967,38 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
 
         if( p_subpic->pf_update_regions )
         {
-            if ( p_subpic->p_region ) {
+            /* FIXME that part look like crap too if there is more than 1 region */
+
+            if( p_subpic->p_region )
                 spu_DestroyRegion( p_spu, p_subpic->p_region );
-            }
-            p_subpic->p_region = p_region = p_subpic->pf_update_regions( p_fmt, p_spu, p_subpic, mdate() );
-        }
-        else
-        {
-            p_region = p_subpic->p_region;
-        }
 
-        /* Load the blending module */
-        if( !p_spu->p_blend && p_region )
-        {
-            p_spu->p_blend = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
-            vlc_object_attach( p_spu->p_blend, p_spu );
-            p_spu->p_blend->fmt_out.video.i_x_offset =
-                p_spu->p_blend->fmt_out.video.i_y_offset = 0;
-            p_spu->p_blend->fmt_out.video.i_aspect = p_fmt->i_aspect;
-            p_spu->p_blend->fmt_out.video.i_chroma = p_fmt->i_chroma;
-
-            /* The blend module will be loaded when needed with the real
-            * input format */
-            memset( &p_spu->p_blend->fmt_in, 0, sizeof(p_spu->p_blend->fmt_in) );
-            p_spu->p_blend->p_module = NULL;
+            /* TODO do not reverse the scaling that was done before calling
+             * spu_RenderSubpictures, just pass it along (or do it inside
+             * spu_RenderSubpictures) */
+            video_format_t fmt_org = *p_fmt;
+            fmt_org.i_width =
+            fmt_org.i_visible_width = i_source_video_width;
+            fmt_org.i_height =
+            fmt_org.i_visible_height = i_source_video_height;
+
+            p_subpic->p_region = p_subpic->pf_update_regions( &fmt_org, p_spu, p_subpic, mdate() );
         }
 
+        /* */
+        p_region = p_subpic->p_region;
+        if( !p_region )
+            continue;
+
+        /* Create the blending module */
+        if( !p_spu->p_blend )
+            SpuRenderCreateBlend( p_spu, p_fmt->i_chroma, p_fmt->i_aspect );
+
         /* Load the text rendering module; it is possible there is a
          * text region somewhere in the subpicture other than the first
          * element in the region list, so just load it anyway as we'll
          * probably want it sooner or later. */
-        if( !p_spu->p_text && p_region )
-        {
-            char *psz_modulename = NULL;
-
-            p_spu->p_text = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
-            vlc_object_attach( p_spu->p_text, p_spu );
-
-            p_spu->p_text->fmt_out.video.i_width =
-                p_spu->p_text->fmt_out.video.i_visible_width =
-                p_fmt->i_width;
-            p_spu->p_text->fmt_out.video.i_height =
-                p_spu->p_text->fmt_out.video.i_visible_height =
-                p_fmt->i_height;
-
-            p_spu->p_text->pf_sub_buffer_new = spu_new_buffer;
-            p_spu->p_text->pf_sub_buffer_del = spu_del_buffer;
-
-            psz_modulename = var_CreateGetString( p_spu, "text-renderer" );
-            if( psz_modulename && *psz_modulename )
-            {
-                p_spu->p_text->p_module =
-                    module_Need( p_spu->p_text, "text renderer",
-                                 psz_modulename, VLC_TRUE );
-            }
-            if( !p_spu->p_text->p_module )
-            {
-                p_spu->p_text->p_module =
-                    module_Need( p_spu->p_text, "text renderer", 0, 0 );
-            }
-            free( psz_modulename );
-        }
+        if( !p_spu->p_text )
+            SpuRenderCreateAndLoadText( p_spu, p_fmt->i_width, p_fmt->i_height );
 
         if( p_spu->p_text )
         {
@@ -641,7 +1013,7 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
              * resolution, rather than video resolution.
              */
             while( p_text_region &&
-                   ( p_text_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
+                   p_text_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') )
             {
                 p_text_region = p_text_region->p_next;
             }
@@ -669,26 +1041,32 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
                         p_fmt->i_height;
                 }
             }
+
+            /* */
+            pi_scale_width[SCALE_TEXT] = p_fmt->i_width * 1000 /
+                                          p_spu->p_text->fmt_out.video.i_width;
+            pi_scale_height[SCALE_TEXT]= p_fmt->i_height * 1000 /
+                                          p_spu->p_text->fmt_out.video.i_height;
         }
 
         pi_scale_width[ SCALE_DEFAULT ]  = i_scale_width_orig;
         pi_scale_height[ SCALE_DEFAULT ] = i_scale_height_orig;
 
-        if( p_spu->p_text )
-        {
-            pi_scale_width[ SCALE_TEXT ]     = ( p_fmt->i_width * 1000 ) /
-                                          p_spu->p_text->fmt_out.video.i_width;
-            pi_scale_height[ SCALE_TEXT ]    = ( p_fmt->i_height * 1000 ) /
-                                          p_spu->p_text->fmt_out.video.i_height;
-        }
         /* If we have an explicit size plane to render to, then turn off
          * the fontsize rescaling.
          */
         if( (p_subpic->i_original_picture_height > 0) &&
             (p_subpic->i_original_picture_width  > 0) )
         {
+#if 1
+            /* FIXME That seems so wrong */
             i_scale_width_orig  = 1000;
             i_scale_height_orig = 1000;
+#else
+            /* It is probably that :*/
+            pi_scale_width[ SCALE_DEFAULT ]  = i_scale_width_orig * i_source_video_width / p_subpic->i_original_picture_width;
+            pi_scale_height[ SCALE_DEFAULT ] = i_scale_height_orig * i_source_video_height / p_subpic->i_original_picture_height;
+#endif
         }
 
         for( k = 0; k < SCALE_SIZE ; k++ )
@@ -708,23 +1086,20 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
         }
 
         /* Set default subpicture aspect ratio */
-        if( p_region && p_region->fmt.i_aspect &&
-            ( !p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den ) )
+        if( p_region->fmt.i_aspect && ( !p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den ) )
         {
             p_region->fmt.i_sar_den = p_region->fmt.i_aspect;
             p_region->fmt.i_sar_num = VOUT_ASPECT_FACTOR;
         }
-        if( p_region &&
-            ( !p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den ) )
+        if( !p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den )
         {
             p_region->fmt.i_sar_den = p_fmt->i_sar_den;
             p_region->fmt.i_sar_num = p_fmt->i_sar_num;
         }
 
         /* Take care of the aspect ratio */
-        if( p_region &&
-            ( ( p_region->fmt.i_sar_num * p_fmt->i_sar_den ) !=
-              ( p_region->fmt.i_sar_den * p_fmt->i_sar_num ) ) )
+        if( ( p_region->fmt.i_sar_num * p_fmt->i_sar_den ) !=
+            ( p_region->fmt.i_sar_den * p_fmt->i_sar_num ) )
         {
             for( k = 0; k < SCALE_SIZE ; k++ )
             {
@@ -735,356 +1110,28 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
             }
         }
 
-        /* Load the scaling module */
-        if( !p_spu->p_scale &&
-           ((((pi_scale_width[ SCALE_TEXT ]    > 0)     || (pi_scale_height[ SCALE_TEXT ]    > 0)) &&
-             ((pi_scale_width[ SCALE_TEXT ]    != 1000) || (pi_scale_height[ SCALE_TEXT ]    != 1000))) ||
-            (((pi_scale_width[ SCALE_DEFAULT ] > 0)     || (pi_scale_height[ SCALE_DEFAULT ] > 0)) &&
-             ((pi_scale_width[ SCALE_DEFAULT ] != 1000) || (pi_scale_height[ SCALE_DEFAULT ] != 1000)))) )
+        /* Load the scaling module when needed */
+        if( !p_spu->p_scale )
         {
-            p_spu->p_scale = vlc_object_create( p_spu, VLC_OBJECT_FILTER );
-            vlc_object_attach( p_spu->p_scale, p_spu );
-            p_spu->p_scale->fmt_out.video.i_chroma =
-                p_spu->p_scale->fmt_in.video.i_chroma =
-                    VLC_FOURCC('Y','U','V','P');
-            /* FIXME: We'll also be using it for YUVA and RGBA blending ... */
-
-            p_spu->p_scale->fmt_in.video.i_width =
-                p_spu->p_scale->fmt_in.video.i_height = 32;
-            p_spu->p_scale->fmt_out.video.i_width =
-                p_spu->p_scale->fmt_out.video.i_height = 16;
-
-            p_spu->p_scale->pf_vout_buffer_new = spu_new_video_buffer;
-            p_spu->p_scale->pf_vout_buffer_del = spu_del_video_buffer;
-            p_spu->p_scale->p_module =
-                module_Need( p_spu->p_scale, "video filter2", 0, 0 );
-        }
+            bool b_scale_used = false;
 
-        while( p_region )
-        {
-            video_format_t orig_fmt = p_region->fmt;
-            vlc_bool_t b_rerender_text = VLC_FALSE;
-            int i_fade_alpha = 255;
-            int i_x_offset;
-            int i_y_offset;
-            int i_scale_idx   = SCALE_DEFAULT;
-            int i_inv_scale_x = 1000;
-            int i_inv_scale_y = 1000;
-
-            if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
-            {
-                if( p_spu->p_text && p_spu->p_text->p_module )
-                {
-                    vlc_value_t  val;
-
-                    /* Setup 3 variables which can be used to render
-                     * time-dependent text (and effects). The first indicates
-                     * the total amount of time the text will be on screen,
-                     * the second the amount of time it has already been on
-                     * screen (can be a negative value as text is layed out
-                     * before it is rendered) and the third is a feedback
-                     * variable from the renderer - if the renderer sets it
-                     * then this particular text is time-dependent, eg. the
-                     * visual progress bar inside the text in karaoke and the
-                     * text needs to be rendered multiple times in order for
-                     * the effect to work - we therefore need to return the
-                     * region to its original state at the end of the loop,
-                     * instead of leaving it in YUVA or YUVP.
-                     * Any renderer which is unaware of how to render
-                     * time-dependent text can happily ignore the variables
-                     * and render the text the same as usual - it should at
-                     * least show up on screen, but the effect won't change
-                     * the text over time.
-                     */
-
-                    var_Create( p_spu->p_text, "spu-duration", VLC_VAR_TIME );
-                    val.i_time = p_subpic->i_stop - p_subpic->i_start;
-                    var_Set( p_spu->p_text, "spu-duration", val );
-
-                    var_Create( p_spu->p_text, "spu-elapsed", VLC_VAR_TIME );
-                    val.i_time = mdate() - p_subpic->i_start;
-                    var_Set( p_spu->p_text, "spu-elapsed", val );
-
-                    var_Create( p_spu->p_text, "text-rerender", VLC_VAR_BOOL );
-                    var_SetBool( p_spu->p_text, "text-rerender", VLC_FALSE );
-
-                    var_Create( p_spu->p_text, "scale", VLC_VAR_INTEGER );
-                    var_SetInteger( p_spu->p_text, "scale",
-                              __MIN(i_scale_width_orig, i_scale_height_orig) );
-
-                    if( p_spu->p_text->pf_render_html && p_region->psz_html )
-                    {
-                        p_spu->p_text->pf_render_html( p_spu->p_text,
-                                                       p_region, p_region );
-                    }
-                    else if( p_spu->p_text->pf_render_text )
-                    {
-                        p_spu->p_text->pf_render_text( p_spu->p_text,
-                                                       p_region, p_region );
-                    }
-                    b_rerender_text = var_GetBool( p_spu->p_text, "text-rerender" );
-
-                    var_Destroy( p_spu->p_text, "spu-duration" );
-                    var_Destroy( p_spu->p_text, "spu-elapsed" );
-                    var_Destroy( p_spu->p_text, "text-rerender" );
-                    var_Destroy( p_spu->p_text, "scale" );
-                }
-                p_region->i_align |= SUBPICTURE_RENDERED;
-            }
-
-            if( p_region->i_align & SUBPICTURE_RENDERED )
-            {
-                i_scale_idx   = SCALE_TEXT;
-                i_inv_scale_x = i_scale_width_orig;
-                i_inv_scale_y = i_scale_height_orig;
-            }
-
-            i_x_offset = (p_region->i_x + pi_subpic_x[ i_scale_idx ]) * i_inv_scale_x / 1000;
-            i_y_offset = (p_region->i_y + p_subpic->i_y) * i_inv_scale_y / 1000;
-
-            /* Force palette if requested */
-            if( p_spu->b_force_palette &&
-                ( VLC_FOURCC('Y','U','V','P') == p_region->fmt.i_chroma ) )
-            {
-                memcpy( p_region->fmt.p_palette->palette,
-                        p_spu->palette, 16 );
-            }
-
-            /* Scale SPU if necessary */
-            if( p_region->p_cache &&
-                ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
-            {
-                if( pi_scale_width[ i_scale_idx ] * p_region->fmt.i_width / 1000 !=
-                    p_region->p_cache->fmt.i_width ||
-                    pi_scale_height[ i_scale_idx ] * p_region->fmt.i_height / 1000 !=
-                    p_region->p_cache->fmt.i_height )
-                {
-                    p_subpic->pf_destroy_region( VLC_OBJECT(p_spu),
-                                                 p_region->p_cache );
-                    p_region->p_cache = 0;
-                }
-            }
-
-            if( ( ( pi_scale_width[ i_scale_idx ] != 1000 ) ||
-                  ( pi_scale_height[ i_scale_idx ] != 1000 ) ) &&
-                ( ( pi_scale_width[ i_scale_idx ] > 0 ) ||
-                  ( pi_scale_height[ i_scale_idx ] > 0 ) ) &&
-                p_spu->p_scale && !p_region->p_cache &&
-                ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
-            {
-                picture_t *p_pic;
-
-                p_spu->p_scale->fmt_in.video = p_region->fmt;
-                p_spu->p_scale->fmt_out.video = p_region->fmt;
-
-                p_region->p_cache =
-                    p_subpic->pf_create_region( VLC_OBJECT(p_spu),
-                        &p_spu->p_scale->fmt_out.video );
-                if( p_spu->p_scale->fmt_out.video.p_palette )
-                    *p_spu->p_scale->fmt_out.video.p_palette =
-                        *p_region->fmt.p_palette;
-                p_region->p_cache->p_next = p_region->p_next;
-
-                vout_CopyPicture( p_spu, &p_region->p_cache->picture,
-                                  &p_region->picture );
-
-                p_spu->p_scale->fmt_out.video.i_width =
-                    p_region->fmt.i_width * pi_scale_width[ i_scale_idx ] / 1000;
-                p_spu->p_scale->fmt_out.video.i_visible_width =
-                    p_region->fmt.i_visible_width * pi_scale_width[ i_scale_idx ] / 1000;
-                p_spu->p_scale->fmt_out.video.i_height =
-                    p_region->fmt.i_height * pi_scale_height[ i_scale_idx ] / 1000;
-                p_spu->p_scale->fmt_out.video.i_visible_height =
-                    p_region->fmt.i_visible_height * pi_scale_height[ i_scale_idx ] / 1000;
-                p_region->p_cache->fmt = p_spu->p_scale->fmt_out.video;
-                p_region->p_cache->i_x = p_region->i_x * pi_scale_width[ i_scale_idx ] / 1000;
-                p_region->p_cache->i_y = p_region->i_y * pi_scale_height[ i_scale_idx ] / 1000;
-                p_region->p_cache->i_align = p_region->i_align;
-
-                p_pic = p_spu->p_scale->pf_video_filter(
-                                 p_spu->p_scale, &p_region->p_cache->picture );
-                if( p_pic )
-                {
-                    picture_t p_pic_tmp = p_region->p_cache->picture;
-                    p_region->p_cache->picture = *p_pic;
-                    *p_pic = p_pic_tmp;
-                    free( p_pic );
-                }
-            }
-
-            if( ( ( pi_scale_width[ i_scale_idx ] != 1000 ) ||
-                  ( pi_scale_height[ i_scale_idx ] != 1000 ) ) &&
-                ( ( pi_scale_width[ i_scale_idx ] > 0 ) ||
-                  ( pi_scale_height[ i_scale_idx ] > 0 ) ) &&
-                p_spu->p_scale && p_region->p_cache &&
-                ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') )  )
-            {
-                p_region = p_region->p_cache;
-            }
-
-            if( p_region->i_align & SUBPICTURE_ALIGN_BOTTOM )
-            {
-                i_y_offset = p_fmt->i_height - p_region->fmt.i_height -
-                    (p_subpic->i_y + p_region->i_y) * i_inv_scale_y / 1000;
-            }
-            else if ( !(p_region->i_align & SUBPICTURE_ALIGN_TOP) )
-            {
-                i_y_offset = p_fmt->i_height / 2 - p_region->fmt.i_height / 2;
-            }
-
-            if( p_region->i_align & SUBPICTURE_ALIGN_RIGHT )
-            {
-                i_x_offset = p_fmt->i_width - p_region->fmt.i_width -
-                    (pi_subpic_x[ i_scale_idx ] + p_region->i_x)
-                    * i_inv_scale_x / 1000;
-            }
-            else if ( !(p_region->i_align & SUBPICTURE_ALIGN_LEFT) )
-            {
-                i_x_offset = p_fmt->i_width / 2 - p_region->fmt.i_width / 2;
-            }
-
-            if( p_subpic->b_absolute )
-            {
-                i_x_offset = (p_region->i_x +
-                    pi_subpic_x[ i_scale_idx ] *
-                                     pi_scale_width[ i_scale_idx ] / 1000)
-                    * i_inv_scale_x / 1000;
-                i_y_offset = (p_region->i_y +
-                    p_subpic->i_y * pi_scale_height[ i_scale_idx ] / 1000)
-                    * i_inv_scale_y / 1000;
-
-            }
-
-            i_x_offset = __MAX( i_x_offset, 0 );
-            i_y_offset = __MAX( i_y_offset, 0 );
-
-            if( ( p_spu->i_margin != 0 ) &&
-                ( p_spu->b_force_crop == VLC_FALSE ) )
-            {
-                int i_diff = 0;
-                int i_low = (i_y_offset - p_spu->i_margin) * i_inv_scale_y / 1000;
-                int i_high = i_low + p_region->fmt.i_height;
-
-                /* crop extra margin to keep within bounds */
-                if( i_low < 0 )
-                    i_diff = i_low;
-                if( i_high > (int)p_fmt->i_height )
-                    i_diff = i_high - p_fmt->i_height;
-                i_y_offset -= ( p_spu->i_margin * i_inv_scale_y / 1000 + i_diff );
-            }
-
-            if( p_subpic->b_fade )
-            {
-                mtime_t i_fade_start = ( p_subpic->i_stop +
-                                         p_subpic->i_start ) / 2;
-                mtime_t i_now = mdate();
-                if( i_now >= i_fade_start && p_subpic->i_stop > i_fade_start )
-                {
-                    i_fade_alpha = 255 * ( p_subpic->i_stop - i_now ) /
-                                   ( p_subpic->i_stop - i_fade_start );
-                }
-            }
-
-            if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') )
+            for( k = 0; k < SCALE_SIZE ; k++ )
             {
-                if( p_spu->p_blend->fmt_in.video.i_chroma != p_region->fmt.i_chroma )
-                {
-                    /* The chroma is not the same, we need to reload the blend module
-                     * XXX to match the old behaviour just test !p_spu->p_blend->fmt_in.video.i_chroma */
-                    if( p_spu->p_blend->p_module )
-                        module_Unneed( p_spu->p_blend, p_spu->p_blend->p_module );
-
-                    p_spu->p_blend->fmt_in.video = p_region->fmt;
-                    p_spu->p_blend->p_module = module_Need( p_spu->p_blend, "video blending", 0, 0 );
-                }
-                else
-                {
-                    p_spu->p_blend->fmt_in.video = p_region->fmt;
-                }
-
-                /* Force cropping if requested */
-                if( p_spu->b_force_crop )
-                {
-                    video_format_t *p_fmt = &p_spu->p_blend->fmt_in.video;
-                    int i_crop_x = p_spu->i_crop_x * pi_scale_width[ i_scale_idx ] / 1000
-                                        * i_inv_scale_x / 1000;
-                    int i_crop_y = p_spu->i_crop_y * pi_scale_height[ i_scale_idx ] / 1000
-                                        * i_inv_scale_y / 1000;
-                    int i_crop_width = p_spu->i_crop_width * pi_scale_width[ i_scale_idx ] / 1000
-                                        * i_inv_scale_x / 1000;
-                    int i_crop_height = p_spu->i_crop_height * pi_scale_height[ i_scale_idx ] / 1000
-                                        * i_inv_scale_y / 1000;
-
-                    /* Find the intersection */
-                    if( i_crop_x + i_crop_width <= i_x_offset ||
-                        i_x_offset + (int)p_fmt->i_visible_width < i_crop_x ||
-                        i_crop_y + i_crop_height <= i_y_offset ||
-                        i_y_offset + (int)p_fmt->i_visible_height < i_crop_y )
-                    {
-                        /* No intersection */
-                        p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
-                    }
-                    else
-                    {
-                        int i_x, i_y, i_x_end, i_y_end;
-                        i_x = __MAX( i_crop_x, i_x_offset );
-                        i_y = __MAX( i_crop_y, i_y_offset );
-                        i_x_end = __MIN( i_crop_x + i_crop_width,
-                                       i_x_offset + (int)p_fmt->i_visible_width );
-                        i_y_end = __MIN( i_crop_y + i_crop_height,
-                                       i_y_offset + (int)p_fmt->i_visible_height );
-
-                        p_fmt->i_x_offset = i_x - i_x_offset;
-                        p_fmt->i_y_offset = i_y - i_y_offset;
-                        p_fmt->i_visible_width = i_x_end - i_x;
-                        p_fmt->i_visible_height = i_y_end - i_y;
-
-                        i_x_offset = i_x;
-                        i_y_offset = i_y;
-                    }
-                }
-
-                i_x_offset = __MAX( i_x_offset, 0 );
-                i_y_offset = __MAX( i_y_offset, 0 );
-
-                /* Update the output picture size */
-                p_spu->p_blend->fmt_out.video.i_width =
-                    p_spu->p_blend->fmt_out.video.i_visible_width =
-                        p_fmt->i_width;
-                p_spu->p_blend->fmt_out.video.i_height =
-                    p_spu->p_blend->fmt_out.video.i_visible_height =
-                        p_fmt->i_height;
-
-                if( p_spu->p_blend->p_module )
-                {
-                    p_spu->p_blend->pf_video_blend( p_spu->p_blend, p_pic_dst,
-                        p_pic_src, &p_region->picture, i_x_offset, i_y_offset,
-                        i_fade_alpha * p_subpic->i_alpha / 255 );
-                }
-                else
-                {
-                    msg_Err( p_spu, "blending %4.4s to %4.4s failed",
-                             (char *)&p_spu->p_blend->fmt_out.video.i_chroma,
-                             (char *)&p_spu->p_blend->fmt_out.video.i_chroma );
-                }
+                const int i_scale_w = pi_scale_width[k];
+                const int i_scale_h = pi_scale_height[k];
+                if( ( i_scale_w > 0 && i_scale_w != 1000 ) || ( i_scale_h > 0 && i_scale_h != 1000 ) )
+                    b_scale_used = true;
             }
 
-            if( b_rerender_text )
-            {
-                /* Some forms of subtitles need to be re-rendered more than
-                 * once, eg. karaoke. We therefore restore the region to its
-                 * pre-rendered state, so the next time through everything is
-                 * calculated again.
-                 */
-                p_region->picture.pf_release( &p_region->picture );
-                memset( &p_region->picture, 0, sizeof( picture_t ) );
-                p_region->fmt = orig_fmt;
-                p_region->i_align &= ~SUBPICTURE_RENDERED;
-            }
-            p_region = p_region->p_next;
+            if( b_scale_used )
+                SpuRenderCreateAndLoadScale( p_spu );
         }
 
-        p_subpic = p_subpic->p_next;
+        for( ; p_region != NULL; p_region = p_region->p_next )
+            SpuRenderRegion( p_spu, p_pic_dst, p_pic_src,
+                             p_subpic, p_region, i_scale_width_orig, i_scale_height_orig,
+                             pi_subpic_x, pi_scale_width, pi_scale_height,
+                             p_fmt );
     }
 
     vlc_mutex_unlock( &p_spu->subpicture_lock );
@@ -1102,7 +1149,7 @@ void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
  * more difficult to guess if a subpicture has to be rendered or not.
  *****************************************************************************/
 subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
-                                   vlc_bool_t b_paused )
+                                   bool b_paused )
 {
     int i_index, i_channel;
     subpicture_t *p_subpic = NULL;
@@ -1110,16 +1157,7 @@ subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
     mtime_t      ephemer_date;
 
     /* Run subpicture filters */
-    for( i_index = 0; i_index < p_spu->i_filter; i_index++ )
-    {
-        subpicture_t *p_subpic_filter;
-        p_subpic_filter = p_spu->pp_filter[i_index]->
-            pf_sub_filter( p_spu->pp_filter[i_index], display_date );
-        if( p_subpic_filter )
-        {
-            spu_DisplaySubpicture( p_spu, p_subpic_filter );
-        }
-    }
+    filter_chain_SubFilter( p_spu->p_chain, display_date );
 
     /* We get an easily parsable chained list of subpictures which
      * ends with NULL since p_subpic was initialized to NULL. */
@@ -1200,12 +1238,13 @@ subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
  * This function destroys the subpictures which belong to the spu channel
  * corresponding to i_channel_id.
  *****************************************************************************/
-static void SpuClearChannel( spu_t *p_spu, int i_channel )
+static void SpuClearChannel( spu_t *p_spu, int i_channel, bool b_locked )
 {
     int          i_subpic;                               /* subpicture index */
     subpicture_t *p_subpic = NULL;                  /* first free subpicture */
 
-    vlc_mutex_lock( &p_spu->subpicture_lock );
+    if( !b_locked )
+        vlc_mutex_lock( &p_spu->subpicture_lock );
 
     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
     {
@@ -1231,7 +1270,8 @@ static void SpuClearChannel( spu_t *p_spu, int i_channel )
         }
     }
 
-    vlc_mutex_unlock( &p_spu->subpicture_lock );
+    if( !b_locked )
+        vlc_mutex_unlock( &p_spu->subpicture_lock );
 }
 
 /*****************************************************************************
@@ -1250,7 +1290,7 @@ static int spu_vaControlDefault( spu_t *p_spu, int i_query, va_list args )
 
     case SPU_CHANNEL_CLEAR:
         i = (int)va_arg( args, int );
-        SpuClearChannel( p_spu, i );
+        SpuClearChannel( p_spu, i, false );
         break;
 
     default:
@@ -1275,12 +1315,12 @@ static void UpdateSPU( spu_t *p_spu, vlc_object_t *p_object )
 {
     vlc_value_t val;
 
-    p_spu->b_force_palette = VLC_FALSE;
-    p_spu->b_force_crop = VLC_FALSE;
+    p_spu->b_force_palette = false;
+    p_spu->b_force_crop = false;
 
     if( var_Get( p_object, "highlight", &val ) || !val.b_bool ) return;
 
-    p_spu->b_force_crop = VLC_TRUE;
+    p_spu->b_force_crop = true;
     var_Get( p_object, "x-start", &val );
     p_spu->i_crop_x = val.i_int;
     var_Get( p_object, "y-start", &val );
@@ -1293,7 +1333,7 @@ static void UpdateSPU( spu_t *p_spu, vlc_object_t *p_object )
     if( var_Get( p_object, "menu-palette", &val ) == VLC_SUCCESS )
     {
         memcpy( p_spu->palette, val.p_address, 16 );
-        p_spu->b_force_palette = VLC_TRUE;
+        p_spu->b_force_palette = true;
     }
 
     msg_Dbg( p_object, "crop: %i,%i,%i,%i, palette forced: %i",
@@ -1338,7 +1378,7 @@ static subpicture_t *spu_new_buffer( filter_t *p_filter )
     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
     if( !p_subpic ) return NULL;
     memset( p_subpic, 0, sizeof(subpicture_t) );
-    p_subpic->b_absolute = VLC_TRUE;
+    p_subpic->b_absolute = true;
 
     p_subpic->pf_create_region = __spu_CreateRegion;
     p_subpic->pf_make_region = __spu_MakeRegion;
@@ -1397,8 +1437,32 @@ static int SubFilterCallback( vlc_object_t *p_object, char const *psz_var,
 
     spu_t *p_spu = (spu_t *)p_data;
     vlc_mutex_lock( &p_spu->subpicture_lock );
-    spu_DeleteChain( p_spu );
+    filter_chain_Reset( p_spu->p_chain, NULL, NULL );
     spu_ParseChain( p_spu );
     vlc_mutex_unlock( &p_spu->subpicture_lock );
     return VLC_SUCCESS;
 }
+
+static int sub_filter_allocation_init( filter_t *p_filter, void *p_data )
+{
+    spu_t *p_spu = (spu_t *)p_data;
+
+    p_filter->pf_sub_buffer_new = sub_new_buffer;
+    p_filter->pf_sub_buffer_del = sub_del_buffer;
+
+    filter_owner_sys_t *p_sys = malloc( sizeof(filter_owner_sys_t) );
+    if( !p_sys ) return VLC_EGENERIC;
+
+    p_filter->p_owner = p_sys;
+    spu_Control( p_spu, SPU_CHANNEL_REGISTER, &p_sys->i_channel );
+    p_sys->p_spu = p_spu;
+
+    return VLC_SUCCESS;
+}
+
+static void sub_filter_allocation_clear( filter_t *p_filter )
+{
+    filter_owner_sys_t *p_sys = p_filter->p_owner;
+    SpuClearChannel( p_sys->p_spu, p_sys->i_channel, true );
+    free( p_filter->p_owner );
+}