meta: simplify a bit

diff --git a/gst/gstmeta.c b/gst/gstmeta.c
index 445f4c0..8bb9c58 100644 (file)
--- a/gst/gstmeta.c
+++ b/gst/gstmeta.c
@@ -123,15 +123,17 @@ typedef struct
 } GstMetaMemoryImpl;
 
 static gpointer
-meta_memory_mmap (GstMetaMemoryImpl * meta, gsize offset, gsize * size,
+meta_memory_mmap (GstMetaMemory * meta, gsize offset, gsize * size,
     GstMetaMapFlags flags)
 {
-  *size = meta->params.size - offset;
-  return meta->params.data + offset;
+  GstMetaMemoryImpl *impl = (GstMetaMemoryImpl *) meta;
+
+  *size = impl->params.size - offset;
+  return impl->params.data + offset;
 }
 
 static gboolean
-meta_memory_munmap (GstMetaMemoryImpl * meta, gpointer data, gsize size)
+meta_memory_munmap (GstMetaMemory * meta, gpointer data, gsize size)
 {
   return TRUE;
 }
@@ -140,8 +142,8 @@ static gboolean
 meta_memory_init (GstMetaMemoryImpl * meta, GstMetaMemoryParams * params,
     GstBuffer * buffer)
 {
-  meta->memory.mmap_func = (GstMetaMapFunc) meta_memory_mmap;
-  meta->memory.munmap_func = (GstMetaUnmapFunc) meta_memory_munmap;
+  meta->memory.mmap_func = meta_memory_mmap;
+  meta->memory.munmap_func = meta_memory_munmap;
   meta->params = *params;
   return TRUE;
 }

diff --git a/gst/gstmeta.h b/gst/gstmeta.h
index dbe8ddc..02723a4 100644 (file)
--- a/gst/gstmeta.h
+++ b/gst/gstmeta.h
@@ -147,29 +147,28 @@ const GstMetaInfo *  gst_meta_get_info        (const gchar * impl);
 
 typedef struct _GstMetaMemory GstMetaMemory;
 
+const GstMetaInfo *gst_meta_memory_get_info(void);
+#define GST_META_MEMORY_INFO (gst_meta_memory_get_info())
+
 typedef enum {
   GST_META_MAP_NONE  = 0,
   GST_META_MAP_READ  = (1 << 0),
   GST_META_MAP_WRITE = (1 << 1)
 } GstMetaMapFlags;
 
-typedef gpointer (*GstMetaMapFunc)     (GstMetaMemory *meta, guint offset, guint *size,
-                                        GstMetaMapFlags flags);
-typedef gboolean (*GstMetaUnmapFunc)   (GstMetaMemory *meta, gpointer data,  guint size);
-
 struct _GstMetaMemory
 {
-  GstMeta           meta;
+  GstMeta      meta;
 
-  GstMetaMapFunc    mmap_func;
-  GstMetaUnmapFunc  munmap_func;
+  gpointer   (*mmap_func)      (GstMetaMemory *meta, gsize offset, gsize *size,
+                                GstMetaMapFlags flags);
+  gboolean   (*munmap_func)    (GstMetaMemory *meta, gpointer data, gsize size);
 };
 
 #define gst_meta_memory_map(m,o,s,f)   ((m)->mmap_func(m, o, s, f))
 #define gst_meta_memory_unmap(m,d,s)   ((m)->munmap_func(m, d, s))
 
-const GstMetaInfo *gst_meta_memory_get_info(void);
-#define GST_META_MEMORY_INFO (gst_meta_memory_get_info())
+#define gst_buffer_get_meta_memory(b)  ((GstMetaMemory*)gst_buffer_get_meta((b),GST_META_MEMORY_INFO))
 
 GstMetaMemory * gst_buffer_add_meta_memory (GstBuffer *buffer, gpointer data,
                                             GFreeFunc free_func,