--- /dev/null
+#ifndef _UVLC_LAYERS_H_
+#define _UVLC_LAYERS_H_
+
+#include <VP_Os/vp_os_types.h>
+#include <VLIB/video_macroblock.h>
+
+#define MAKE_START_CODE(gob) ( UVLC_CODEC | (gob) )
+#define PICTURE_START_CODE MAKE_START_CODE(0)
+#define PICTURE_END_CODE MAKE_START_CODE(0x1F)
+
+#define UVLC_FORMAT_CIF 1
+#define UVLC_FORMAT_VGA 2
+
+#define UVLC_RESOLUTION_SUBQ 1 /* sub-QCIF */
+#define UVLC_RESOLUTION_Q 2 /* QCIF */
+#define UVLC_RESOLUTION_1 3 /* CIF */
+#define UVLC_RESOLUTION_4 4 /* 4-CIF */
+#define UVLC_RESOLUTION_16 5 /* 16-CIF */
+
+typedef struct _uvlc_mb_layer_t {
+ uint32_t desc;
+ uint32_t dquant;
+} uvlc_mb_layer_t;
+
+typedef struct _uvlc_gob_layer_t {
+ video_macroblock_t* macroblocks;
+ uint32_t quant;
+} uvlc_gob_layer_t;
+
+typedef struct _uvlc_picture_layer_t {
+ uint32_t format;
+ uint32_t resolution;
+ uint32_t picture_type;
+ uint32_t quant;
+ uvlc_gob_layer_t* gobs;
+} uvlc_picture_layer_t;
+
+C_RESULT uvlc_write_picture_layer( video_controller_t* controller, video_stream_t* stream );
+C_RESULT uvlc_read_picture_layer( video_controller_t* controller, video_stream_t* stream );
+
+C_RESULT uvlc_write_gob_layer( video_stream_t* stream, uvlc_gob_layer_t* gob );
+C_RESULT uvlc_read_gob_layer( video_stream_t* stream, uvlc_gob_layer_t* gob );
+
+C_RESULT uvlc_write_mb_layer( video_stream_t* stream, video_macroblock_t* mb, int32_t num_macro_blocks );
+C_RESULT uvlc_read_mb_layer( video_stream_t* stream, video_macroblock_t* mb, int32_t num_macro_blocks );
+
+#endif // _UVLC_LAYERS_H_