From 73a97eb400ad7eebef28ed9f3349d5107954b11f Mon Sep 17 00:00:00 2001
From: atmos4 <atmos4@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sat, 25 May 2002 17:40:40 +0000
Subject: [PATCH] Bounding box and partial update patch for vob/dvdsub by
 Hephooey.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6191 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libvo/sub.c | 22 ++++++++++++++++++++--
 mplayer.c   |  5 +++--
 spudec.c    | 34 ++++++++++++++++++++++++++++++++--
 3 files changed, 55 insertions(+), 6 deletions(-)

diff --git a/libvo/sub.c b/libvo/sub.c
index 5e44238121..664f9f2cde 100644
--- a/libvo/sub.c
+++ b/libvo/sub.c
@@ -320,6 +320,22 @@ inline static void vo_update_text_sub(mp_osd_obj_t* obj,int dxs,int dys){
     
 }
 
+inline static void vo_update_spudec_sub(mp_osd_obj_t* obj, int dxs, int dys)
+{
+  unsigned int bbox[4];
+  int i;
+  spudec_calc_bbox(vo_spudec, dxs, dys, bbox);
+  obj->bbox.x1 = bbox[0];
+  obj->bbox.x2 = bbox[1];
+  obj->bbox.y1 = bbox[2];
+  obj->bbox.y2 = bbox[3];
+  obj->flags |= OSDFLAG_BBOX;
+}
+
+inline static void vo_draw_spudec_sub(mp_osd_obj_t* obj, void (*draw_alpha)(int x0, int y0, int w, int h, unsigned char* src, unsigned char* srca, int stride))
+{
+  spudec_draw_scaled(vo_spudec, obj->dxs, obj->dys, draw_alpha);
+}
 inline static void vo_draw_text_sub(mp_osd_obj_t* obj,void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)){
    int i,j,c,x,l,font;
    int y=obj->y;
@@ -385,8 +401,10 @@ int vo_update_osd(int dxs,int dys){
 	    vo_update_text_progbar(obj,dxs,dys);
 	    break;
 	case OSDTYPE_SPU:
-	    if(vo_spudec && spudec_visible(vo_spudec))
+	    if(vo_spudec && spudec_visible(vo_spudec)){
+	        vo_update_spudec_sub(obj, dxs, dys);
 		obj->flags|=OSDFLAG_VISIBLE|OSDFLAG_CHANGED;
+	    }
 	    else
 		obj->flags&=~OSDFLAG_VISIBLE;
 	    break;
@@ -473,7 +491,7 @@ void vo_draw_text(int dxs,int dys,void (*draw_alpha)(int x0,int y0, int w,int h,
 	vo_osd_changed_flag=obj->flags&OSDFLAG_CHANGED;	// temp hack
 	switch(obj->type){
 	case OSDTYPE_SPU:
-	    spudec_draw_scaled(vo_spudec, dxs, dys, draw_alpha); // FIXME
+	    vo_draw_spudec_sub(obj, draw_alpha); // FIXME
 	    break;
 	case OSDTYPE_OSD:
 	    vo_draw_text_osd(obj,draw_alpha);
diff --git a/mplayer.c b/mplayer.c
index ce44c7974a..ca0f775a97 100644
--- a/mplayer.c
+++ b/mplayer.c
@@ -2960,8 +2960,9 @@ if(vo_config_count && vo_spudec) {
       spudec_assemble(vo_spudec,packet,len,timestamp);
   }
   
-  /* Don't know how to detect wether the sub has changed or not */
-  vo_osd_changed(OSDTYPE_SPU);
+  /* detect wether the sub has changed or not */
+  if(spudec_changed(vo_spudec))
+    vo_osd_changed(OSDTYPE_SPU);
   current_module=NULL;
 }
   
diff --git a/spudec.c b/spudec.c
index 887bb37a3e..2665674774 100644
--- a/spudec.c
+++ b/spudec.c
@@ -3,7 +3,7 @@
    1: aproximate
    2: full (slowest, best looking)
  */
-#define ANTIALIASING_ALGORITHM 1
+#define ANTIALIASING_ALGORITHM 2
 
 /* SPUdec.c
    Skeleton of function spudec_process_controll() is from xine sources.
@@ -69,6 +69,7 @@ typedef struct {
   vo_functions_t *hw_spu;
 } spudec_handle_t;
 
+static int spu_changed = 0;
 
 static inline unsigned int get_be16(const unsigned char *p)
 {
@@ -347,8 +348,14 @@ static void spudec_decode(spudec_handle_t *this, unsigned int pts100)
     spudec_process_control(this, pts100);
     spudec_process_data(this);
   }
+  spu_changed = 1;
 }
 
+int spudec_changed(void * this)
+{
+    spudec_handle_t * spu = (spudec_handle_t*)this;
+    return (spu_changed|(spu->now_pts > spu->end_pts));
+}
 
 void spudec_assemble(void *this, unsigned char *packet, unsigned int len, unsigned int pts100)
 {
@@ -445,6 +452,27 @@ void spudec_draw(void *this, void (*draw_alpha)(int x0,int y0, int w,int h, unsi
 		   spu->image, spu->aimage, spu->stride);
 }
 
+void spudec_calc_bbox(void *me, unsigned int dxs, unsigned int dys, unsigned int* bbox)
+{
+  spudec_handle_t *spu;
+  spu = (spudec_handle_t *)me;
+  if (spu->orig_frame_width == 0 || spu->orig_frame_height == 0
+  || (spu->orig_frame_width == dxs && spu->orig_frame_height == dys)) {
+    bbox[0] = spu->start_col;
+    bbox[1] = spu->start_col + spu->width;
+    bbox[2] = spu->start_row;
+    bbox[3] = spu->start_row + spu->height;
+  }
+  else if (spu->scaled_frame_width != dxs || spu->scaled_frame_height != dys) {
+    unsigned int scalex = 0x100 * dxs / spu->orig_frame_width;
+    unsigned int scaley = 0x100 * dys / spu->orig_frame_height;
+    bbox[0] = spu->start_col * scalex / 0x100;
+    bbox[1] = spu->start_col * scalex / 0x100 + spu->width * scalex / 0x100;
+    bbox[2] = spu->start_row * scaley / 0x100;
+    bbox[3] = spu->start_row * scaley / 0x100 + spu->height * scaley / 0x100;
+  }
+}
+
 /* transform mplayer's alpha value into an opacity value that is linear */
 static inline int canon_alpha(int alpha)
 {
@@ -718,9 +746,11 @@ void spudec_draw_scaled(void *me, unsigned int dxs, unsigned int dys, void (*dra
 	  spu->scaled_frame_height = dys;
 	}
       }
-      if (spu->scaled_image)
+      if (spu->scaled_image){
 	draw_alpha(spu->scaled_start_col, spu->scaled_start_row, spu->scaled_width, spu->scaled_height,
 		   spu->scaled_image, spu->scaled_aimage, spu->scaled_stride);
+	spu_changed = 0;
+      }
     }
   }
   else