ArDrone SDK 1.8 added

[mardrone] / mardrone / ARDrone_SDK_Version_1_8_20110726 / ARDroneLib / VLIB / video_huffman.h

diff --git a/mardrone/ARDrone_SDK_Version_1_8_20110726/ARDroneLib/VLIB/video_huffman.h b/mardrone/ARDrone_SDK_Version_1_8_20110726/ARDroneLib/VLIB/video_huffman.h
new file mode 100644 (file)
index 0000000..31de4b8
--- /dev/null
+++ b/mardrone/ARDrone_SDK_Version_1_8_20110726/ARDroneLib/VLIB/video_huffman.h
@@ -0,0 +1,44 @@
+#ifndef _VIDEO_HUFFMAN_H_
+#define _VIDEO_HUFFMAN_H_
+
+#include <VP_Os/vp_os_types.h>
+#include <VLIB/video_controller.h>
+
+# pragma pack (1)
+
+typedef struct _huffman_code_t {
+  int32_t index;
+  union {
+    struct {
+      uint8_t   length;
+      uint32_t  vlc:24;
+    };
+    int32_t code;
+  };
+} huffman_code_t;
+
+# pragma pack () // resets packsize to default value
+
+typedef struct _huffman_tree_data_t {
+  huffman_code_t* code;
+  int32_t         weight;
+} huffman_tree_data_t;
+
+typedef struct _huffman_tree_t {
+  int32_t num_used_codes;
+  int32_t num_max_codes;
+  int32_t max_code_length;
+
+  huffman_tree_data_t data[];
+} huffman_tree_t;
+
+huffman_tree_t* huffman_alloc( int32_t num_max_codes, int32_t max_code_length );
+void huffman_free( huffman_tree_t* tree );
+
+C_RESULT huffman_add_codes( huffman_tree_t* tree, huffman_code_t* codes, int32_t num_codes );
+C_RESULT huffman_sort_codes( huffman_tree_t* tree );
+
+C_RESULT huffman_check_code( huffman_tree_t* tree, uint32_t code, uint32_t length );
+int32_t  huffman_stream_code( huffman_tree_t* tree, video_stream_t* stream );
+
+#endif // _VIDEO_HUFFMAN_H_