Added blend filter helpers.

[vlc] / include / vlc_filter.h

diff --git a/include/vlc_filter.h b/include/vlc_filter.h
index a7404a74cee114d1ee4363977e7e5de4dc47ec0e..cb0f7456c9be1fdce399647740a90d884a24d8bd 100644 (file)
--- a/include/vlc_filter.h
+++ b/include/vlc_filter.h
@@ -26,6 +26,9 @@
 #define VLC_FILTER_H 1
 
 #include <vlc_es.h>
+#include <vlc_picture.h>
+#include <vlc_subpicture.h>
+#include <vlc_mouse.h>
 
 /**
  * \file
@@ -60,7 +63,7 @@ struct filter_t
     picture_t *         ( * pf_video_filter ) ( filter_t *, picture_t * );
     block_t *           ( * pf_audio_filter ) ( filter_t *, block_t * );
     void                ( * pf_video_blend )  ( filter_t *,
-                                                picture_t *, picture_t *,
+                                                picture_t *, const picture_t *,
                                                 int, int, int );
 
     subpicture_t *      ( *pf_sub_filter ) ( filter_t *, mtime_t );
@@ -69,6 +72,18 @@ struct filter_t
     int                 ( *pf_render_html ) ( filter_t *, subpicture_region_t *,
                                               subpicture_region_t * );
 
+    /* Filter mouse state.
+     *
+     * If non NULL, you must convert from output format to input format,
+     * if VLC_SUCCESS is returned, the mouse state is then propagated.
+     * If NULL, the mouse state is considered unchanged and will be
+     * propagated.
+     *
+     * If VLC_SUCCESS is not returned, the mouse changes are not propagated.
+     */
+    int                 ( *pf_mouse )( filter_t *, vlc_mouse_t *,
+                                       const vlc_mouse_t *p_old,
+                                       const vlc_mouse_t *p_new );
     /*
      * Buffers allocation
      */
@@ -166,6 +181,29 @@ static inline block_t *filter_NewAudioBuffer( filter_t *p_filter, int i_size )
     return p_block;
 }
 
+/**
+ * It creates a blend filter
+ */
+VLC_EXPORT( filter_t *, filter_NewBlend, ( vlc_object_t *, vlc_fourcc_t i_chroma_dst ) );
+
+/**
+ * It configures blend filter parameters that are allowed to changed
+ * after the creation.
+ */
+VLC_EXPORT( int, filter_ConfigureBlend, ( filter_t *, int i_dst_width, int i_dst_height, const video_format_t *p_src ) );
+
+/**
+ * It blends a picture into another one.
+ *
+ * The input picture is not modified and not released.
+ */
+VLC_EXPORT( int, filter_Blend, ( filter_t *, picture_t *p_dst, int i_dst_x, int i_dst_y, picture_t *p_src, int i_alpha ) );
+
+/**
+ * It destroys a blend filter created by filter_NewBlend.
+ */
+VLC_EXPORT( void, filter_DeleteBlend, ( filter_t * ) );
+
 /**
  * Create a picture_t *(*)( filter_t *, picture_t * ) compatible wrapper
  * using a void (*)( filter_t *, picture_t *, picture_t * ) function
@@ -310,5 +348,15 @@ VLC_EXPORT( block_t *, filter_chain_AudioFilter, ( filter_chain_t *, block_t * )
  */
 VLC_EXPORT( void, filter_chain_SubFilter, ( filter_chain_t *, mtime_t ) );
 
+/**
+ * Apply the filter chain to a mouse state.
+ *
+ * It will be applied from the output to the input. It makes sense only
+ * for a video filter chain.
+ *
+ * The vlc_mouse_t* pointers may be the same.
+ */
+VLC_EXPORT( int, filter_chain_MouseFilter, ( filter_chain_t *, vlc_mouse_t *, const vlc_mouse_t * ) );
+
 #endif /* _VLC_FILTER_H */