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/******************************************************************************
 *                                                                            *
 * This module converts video streams between RGB color formats.              *
 *                                                                            *
 ******************************************************************************/

module soc_system_vga_rgb_resampler (
	// Inputs
	clk,
	reset,

	stream_in_data,
	stream_in_startofpacket,
	stream_in_endofpacket,
	stream_in_empty,
	stream_in_valid,

	stream_out_ready,
	
	// Bidirectional

	// Outputs
	stream_in_ready,


	stream_out_data,
	stream_out_startofpacket,
	stream_out_endofpacket,
	stream_out_empty,
	stream_out_valid
);

/*****************************************************************************
 *                           Parameter Declarations                          *
 *****************************************************************************/

parameter IDW		= 31;
parameter ODW		= 29;

parameter IEW		= 1;
parameter OEW		= 1;

parameter ALPHA	= 10'h3FF;

/*****************************************************************************
 *                             Port Declarations                             *
 *****************************************************************************/

// Inputs
input						clk;
input						reset;

input			[IDW:0]	stream_in_data;
input						stream_in_startofpacket;
input						stream_in_endofpacket;
input			[IEW:0]	stream_in_empty;
input						stream_in_valid;

input						stream_out_ready;

// Bidirectional

// Outputs
output					stream_in_ready;

output reg	[ODW:0]	stream_out_data;
output reg				stream_out_startofpacket;
output reg				stream_out_endofpacket;
output reg	[OEW:0]	stream_out_empty;
output reg				stream_out_valid;

/*****************************************************************************
 *                           Constant Declarations                           *
 *****************************************************************************/


/*****************************************************************************
 *                 Internal Wires and Registers Declarations                 *
 *****************************************************************************/

// Internal Wires
wire		[ 9: 0]	r;
wire		[ 9: 0]	g;
wire		[ 9: 0]	b;
wire		[ 9: 0]	a;


wire		[ODW:0]	converted_data;

// Internal Registers

// State Machine Registers

// Integers

/*****************************************************************************
 *                         Finite State Machine(s)                           *
 *****************************************************************************/


/*****************************************************************************
 *                             Sequential Logic                              *
 *****************************************************************************/

// Output Registers
always @(posedge clk)
begin
	if (reset)
	begin
		stream_out_data				<=  'b0;
		stream_out_startofpacket	<= 1'b0;
		stream_out_endofpacket		<= 1'b0;
		stream_out_empty				<=  'b0;
		stream_out_valid				<= 1'b0;
	end
	else if (stream_out_ready | ~stream_out_valid)
	begin
		stream_out_data				<= converted_data;
		stream_out_startofpacket	<= stream_in_startofpacket;
		stream_out_endofpacket		<= stream_in_endofpacket;
		stream_out_empty				<= stream_in_empty;
		stream_out_valid				<= stream_in_valid;
	end
end

// Internal Registers

/*****************************************************************************
 *                            Combinational Logic                            *
 *****************************************************************************/

// Output Assignments
assign stream_in_ready = stream_out_ready | ~stream_out_valid;

// Internal Assignments
assign r = {stream_in_data[23:16], stream_in_data[23:22]};
assign g = {stream_in_data[15: 8], stream_in_data[15:14]};
assign b = {stream_in_data[ 7: 0], stream_in_data[ 7: 6]};

assign a = {stream_in_data[31:24], stream_in_data[31:30]};

assign converted_data[29:20] = r[ 9: 0];
assign converted_data[19:10] = g[ 9: 0];
assign converted_data[ 9: 0] = b[ 9: 0];

/*****************************************************************************
 *                              Internal Modules                             *
 *****************************************************************************/


endmodule

