Change the chain module so it allows chaining more than 2 chroma modules...

Change the chain module so it allows chaining more than 2 chroma modules (you'll have to change the define at the start of the source code, and there's no guarantee that it'll use the shortest path between the source and dest chromas).

modules/video_chroma/chain.c

@@ -69,21 +69,22 @@ static const vlc_fourcc_t pi_allowed_chromas[] = {
  *****************************************************************************/
 static int Activate( vlc_object_t *p_this )
 {
-    static int hack = 0;
+    static int hack = 1;
     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 
-    if( hack )
+    hack++;
+    if( hack > MAX_CHROMAS )
     {
-        msg_Err( p_this, "Preventing chain chroma reccursion" );
+        hack--;
+        msg_Err( p_this, "Preventing chain chroma reccursion (already %d long)",
+                 hack );
         return VLC_EGENERIC;
     }
 
-    hack = 1;
-
     chroma_sys_t *p_sys = (chroma_sys_t *)malloc( sizeof( chroma_sys_t ) );
     if( !p_sys )
     {
-        hack = 0;
+        hack--;
         return VLC_ENOMEM;
     }
     memset( p_sys, 0, sizeof( chroma_sys_t ) );
@@ -123,12 +124,13 @@ static int Activate( vlc_object_t *p_this )
         p_sys->i_chroma = pi_allowed_chromas[i];
         p_vout->chroma.pf_convert = Chain;
         p_vout->chroma.p_sys = p_sys;
-        hack = 0;
+        hack--;
+        printf("Init: p_sys->p_tmp= %p\n", p_sys->p_tmp );
         return VLC_SUCCESS;
     }
 
     free( p_sys );
-    hack = 0;
+    hack--;
     return VLC_EGENERIC;
 }
 
@@ -150,6 +152,7 @@ static void Destroy( vlc_object_t *p_this )
         free( chroma.p_sys->p_tmp );
     }
     free( chroma.p_sys );
+    chroma.p_sys = NULL;
 }
 
 /*****************************************************************************
@@ -176,6 +179,10 @@ static void Chain( vout_thread_t *p_vout, picture_t *p_source,
         p_tmp->p_sys = NULL;
     }
 
+    vout_chroma_t chroma = p_vout->chroma;
+    p_vout->chroma = p_sys->chroma1;
     p_sys->chroma1.pf_convert( p_vout, p_source, p_sys->p_tmp );
+    p_vout->chroma = p_sys->chroma2;
     p_sys->chroma2.pf_convert( p_vout, p_sys->p_tmp, p_dest );
+    p_vout->chroma = chroma;
 }