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1 25 mikel262 
--------------------------------------------------------------------------------
2 
--                                                                            --
3 
--                          V H D L    F I L E                                --
4 
--                          COPYRIGHT (C) 2006                                --
5 
--                                                                            --
6 
--------------------------------------------------------------------------------
7 
--
8 
-- Title       : MDCTTB_PKG
9 
-- Design      : MDCT Core
10 
-- Author      : Michal Krepa
11 
--
12 
--------------------------------------------------------------------------------
13 
--
14 
-- File        : MDCTTB_PKG.VHD
15 
-- Created     : Sat Mar 5 2006
16 
--
17 
--------------------------------------------------------------------------------
18 
--
19 
--  Description : Package for testbench simulation
20 
--
21 
--------------------------------------------------------------------------------
22 
 
23 
library IEEE;
24 
  use IEEE.STD_LOGIC_1164.all;
25 
  use IEEE.STD_LOGIC_ARITH.all;
26 
--  use IEEE.NUMERIC_STD.all;
27 
  use IEEE.MATH_REAL.all;
28 
 
29 
library STD;
30 
  use STD.TEXTIO.all;
31 
 
32 
library WORK;
33 
  use WORK.MDCT_PKG.all;
34 
 
35 
package MDCTTB_PKG is
36 
 
37 
    ----------------------------------------------
38 
    -- constant section 1
39 
    ----------------------------------------------
40 
    constant MAX_IMAGE_SIZE_X : INTEGER := 1280;
41 
    constant MAX_IMAGE_SIZE_Y : INTEGER := 1280;
42 
    ----------------------------------------------
43 
    -- type section
44 
    ----------------------------------------------
45 
    type MATRIX_TYPE   is array (0 to N-1,0 TO N-1) of REAL;
46 
    type I_MATRIX_TYPE is array (0 to N-1,0 TO N-1) of INTEGER;
47 
    type COEM_TYPE     is array (0 to N/2-1, 0 to N/2-1)
48 
          of SIGNED(ROMDATA_W-1 downto 0);
49 
    type VECTOR4       is array (0 to N/2-1) of REAL;
50 
    type N_LINES_TYPE  is array (0 to N-1)
51 
          of STD_LOGIC_VECTOR(0 to MAX_IMAGE_SIZE_X*IP_W-1);
52 
    type IMAGE_TYPE    is array (0 to MAX_IMAGE_SIZE_Y-1,
53 
 
54 
 
55 
    ----------------------------------------------
56 
    -- function section
57 
    ----------------------------------------------
58 
    procedure CMP_MATRIX(ref_matrix   : in I_MATRIX_TYPE;
59 
                       dcto_matrix    : in I_MATRIX_TYPE;
60 
                       max_error      : in INTEGER;
61 
                       error_matrix   : out I_MATRIX_TYPE;
62 
                       error_cnt      : inout INTEGER);
63 
    function STR(int: INTEGER; base: INTEGER) return STRING;
64 
    function COMPUTE_REF_DCT1D(input_matrix : I_MATRIX_TYPE; shift : BOOLEAN
65 
                        ) return I_MATRIX_TYPE;
66 
    function COMPUTE_REF_IDCT(X : I_MATRIX_TYPE) return I_MATRIX_TYPE;
67 
    function COMPUTE_PSNR(ref_input : I_MATRIX_TYPE;
68 
                        reconstr_input : I_MATRIX_TYPE) return REAL;
69 
    function COMPUTE_PSNR(ref_input : IMAGE_TYPE;
70 
                       reconstr_input : IMAGE_TYPE;
71 
                       ysize : INTEGER;
72 
                       xsize : INTEGER
73 
                       ) return REAL;
74 
    ----------------------------------------------
75 
    -- constant section 2
76 
    ----------------------------------------------
77 
    -- set below to true to enable quantization in testbench
78 
    constant CLK_FREQ_C        : INTEGER := 50;
79 
    constant HOLD_TIME         : TIME := 1 ns;
80 
    constant ENABLE_QUANTIZATION_C : BOOLEAN := FALSE;
81 
    constant HEX_BASE          : INTEGER := 16;
82 
    constant DEC_BASE          : INTEGER := 10;
83 
    constant RUN_FULL_IMAGE    : BOOLEAN := FALSE;
84 
    constant FILEIN_NAME_C     : STRING := "SOURCE\TESTBENCH\lena512.txt";
85 
    constant FILEERROR_NAME_C  : STRING := "SOURCE\TESTBENCH\imagee.txt";
86 
    constant FILEIMAGEO_NAME_C : STRING := "SOURCE\TESTBENCH\imageo.txt";
87 
    constant MAX_ERROR_1D      : INTEGER := 1;
88 
    constant MAX_ERROR_2D      : INTEGER := 4;
89 
    constant MAX_PIX_VAL       : INTEGER := 2**IP_W-1;
90 
    constant null_data_r       : MATRIX_TYPE :=
91 
                          (
92 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
93 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
94 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
95 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
96 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
97 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
98 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0),
99 
                          (000.0,000.0,000.0,000.0,000.0,000.0,000.0,000.0)
100 
                          );
101 
 
102 
    constant input_data0   : I_MATRIX_TYPE :=
103 
                          (
104 
                          (139,144,149,153,155,155,155,155),
105 
                          (144,151,153,156,159,156,156,156),
106 
                          (150,155,160,163,158,156,156,156),
107 
                          (159,161,162,160,160,159,159,159),
108 
                          (159,160,161,162,162,155,155,155),
109 
                          (161,161,161,161,160,157,157,157),
110 
                          (162,162,161,163,162,157,157,157),
111 
                          (162,162,161,161,163,158,158,158)
112 
                          );
113 
 
114 
    constant input_data1   : I_MATRIX_TYPE :=
115 
                          (
116 
                          (255,255,255,000,000,255,254,255),
117 
                          (255,255,255,000,000,255,254,000),
118 
                          (255,255,255,000,000,255,254,255),
119 
                          (255,255,255,000,000,255,254,000),
120 
                          (254,000,255,255,000,255,254,255),
121 
                          (254,000,255,255,000,255,254,000),
122 
                          (254,000,255,255,000,255,254,255),
123 
                          (254,000,255,255,000,255,254,000)
124 
                          );
125 
 
126 
    constant input_data2   : I_MATRIX_TYPE :=
127 
                          (
128 
                          (000,000,000,000,000,000,000,000),
129 
                          (000,000,000,000,000,000,000,000),
130 
                          (000,000,000,000,000,000,000,000),
131 
                          (000,000,000,000,000,000,000,000),
132 
                          (000,000,000,000,000,000,000,000),
133 
                          (000,000,000,000,000,000,000,000),
134 
                          (000,000,000,000,000,000,000,000),
135 
                          (000,000,000,000,000,000,000,000)
136 
                          );
137 
    constant input_data3   : I_MATRIX_TYPE :=
138 
                          (
139 
                          (55,89,0,2,35,34,100,255),
140 
                          (144,151,153,151,159,156,156,156),
141 
                          (150,155,165,163,158,126,156,156),
142 
                          (254,000,255,255,000,245,254,255),
143 
                          (159,199,161,162,162,133,155,165),
144 
                          (231,000,255,235,000,255,254,253),
145 
                          (162,162,161,163,162,157,157,157),
146 
                          (11,12,167,165,166,167,101,108)
147 
                          );
148 
 
149 
   constant input_data4   : I_MATRIX_TYPE :=
150 
                          (
151 
                          (135,14,145,15,155,15,155,15),
152 
                          (140,15,151,15,152,15,153,15),
153 
                          (154,15,165,16,156,15,157,15),
154 
                          (158,16,168,16,169,15,150,15),
155 
                          (15,161,16,162,16,153,15,154),
156 
                          (165,16,166,16,167,15,158,15),
157 
                          (16,169,16,160,16,152,15,153),
158 
                          (164,16,165,16,165,15,156,15)
159 
                          );
160 
 
161 
    -- from JPEG standard (but not in standard itself!)
162 
    constant Q_JPEG_STD : I_MATRIX_TYPE :=
163 
                          (
164 
                          (16,11,10,16,24,40,51,61),
165 
                          (12,12,14,19,26,58,60,55),
166 
                          (14,13,16,24,40,57,69,56),
167 
                          (14,17,22,29,51,87,80,62),
168 
                          (18,22,37,56,68,109,103,77),
169 
                          (24,35,55,64,81,104,113,92),
170 
                          (49,64,78,87,103,121,120,101),
171 
                          (72,92,95,98,112,100,103,99)
172 
                          );
173 
 
174 
    -- CANON EOS10D super fine quality
175 
    constant Q_CANON10D : I_MATRIX_TYPE :=
176 
                          (
177 
                          (1,  1,  1,  1,  1,  1,  2,  2),
178 
                          (1,  1,       1,      1,      1,      2,      4,      4),
179 
                          (1,  1,       1,      1,      1,      3,      3,      5),
180 
                          (1,  1,       1,      2,      3,      3,      5,      5),
181 
                          (1,  1,       3,      3,      4,      4,      5,      5),
182 
                          (1,  3,       3,      3,      4,      5,      6,      6),
183 
                          (2,  3,       3,      5,      3,      6,      5,      5),
184 
                          (3,  3,       4,      3,      6,      4,      5,      5)
185 
                          );
186 
 
187 
    -- quantization matrix used in testbench
188 
    constant Q_MATRIX_USED : I_MATRIX_TYPE := Q_CANON10D;
189 
 
190 
    constant Ce : COEM_TYPE :=
191 
                            (
192 
                            (CONV_SIGNED(AP,ROMDATA_W),CONV_SIGNED(AP,ROMDATA_W),CONV_SIGNED(AP,ROMDATA_W),CONV_SIGNED(AP,ROMDATA_W)),
193 
                            (CONV_SIGNED(BP,ROMDATA_W),CONV_SIGNED(CP,ROMDATA_W),CONV_SIGNED(CM,ROMDATA_W),CONV_SIGNED(BM,ROMDATA_W)),
194 
                            (CONV_SIGNED(AP,ROMDATA_W),CONV_SIGNED(AM,ROMDATA_W),CONV_SIGNED(AM,ROMDATA_W),CONV_SIGNED(AP,ROMDATA_W)),
195 
                            (CONV_SIGNED(CP,ROMDATA_W),CONV_SIGNED(BM,ROMDATA_W),CONV_SIGNED(BP,ROMDATA_W),CONV_SIGNED(CM,ROMDATA_W))
196 
                            );
197 
 
198 
    constant Co : COEM_TYPE :=
199 
                            (
200 
                            (CONV_SIGNED(DP,ROMDATA_W),CONV_SIGNED(EP,ROMDATA_W),CONV_SIGNED(FP,ROMDATA_W),CONV_SIGNED(GP,ROMDATA_W)),
201 
                            (CONV_SIGNED(EP,ROMDATA_W),CONV_SIGNED(GM,ROMDATA_W),CONV_SIGNED(DM,ROMDATA_W),CONV_SIGNED(FM,ROMDATA_W)),
202 
                            (CONV_SIGNED(FP,ROMDATA_W),CONV_SIGNED(DM,ROMDATA_W),CONV_SIGNED(GP,ROMDATA_W),CONV_SIGNED(EP,ROMDATA_W)),
203 
                            (CONV_SIGNED(GP,ROMDATA_W),CONV_SIGNED(FM,ROMDATA_W),CONV_SIGNED(EP,ROMDATA_W),CONV_SIGNED(DM,ROMDATA_W))
204 
                            );
205 
end MDCTTB_PKG;
206 
 
207 
--------------------------------------------------
208 
-- PACKAGE BODY
209 
--------------------------------------------------
210 
package body MDCTTB_PKG is
211 
  --------------------------------------------------------------------------
212 
  -- converts an INTEGER into a CHARACTER
213 
  -- for 0 to 9 the obvious mapping is used, higher
214 
  -- values are mapped to the CHARACTERs A-Z
215 
  -- (this is usefull for systems with base > 10)
216 
  -- (adapted from Steve Vogwell's posting in comp.lang.vhdl)
217 
  --------------------------------------------------------------------------
218 
  function CHR(int: INTEGER) return CHARACTER is
219 
   variable c: CHARACTER;
220 
  begin
221 
    case int is
222 
      when  0 => c := '0';
223 
      when  1 => c := '1';
224 
      when  2 => c := '2';
225 
      when  3 => c := '3';
226 
      when  4 => c := '4';
227 
      when  5 => c := '5';
228 
      when  6 => c := '6';
229 
      when  7 => c := '7';
230 
      when  8 => c := '8';
231 
      when  9 => c := '9';
232 
      when 10 => c := 'A';
233 
      when 11 => c := 'B';
234 
      when 12 => c := 'C';
235 
      when 13 => c := 'D';
236 
      when 14 => c := 'E';
237 
      when 15 => c := 'F';
238 
      when 16 => c := 'G';
239 
      when 17 => c := 'H';
240 
      when 18 => c := 'I';
241 
      when 19 => c := 'J';
242 
      when 20 => c := 'K';
243 
      when 21 => c := 'L';
244 
      when 22 => c := 'M';
245 
      when 23 => c := 'N';
246 
      when 24 => c := 'O';
247 
      when 25 => c := 'P';
248 
      when 26 => c := 'Q';
249 
      when 27 => c := 'R';
250 
      when 28 => c := 'S';
251 
      when 29 => c := 'T';
252 
      when 30 => c := 'U';
253 
      when 31 => c := 'V';
254 
      when 32 => c := 'W';
255 
      when 33 => c := 'X';
256 
      when 34 => c := 'Y';
257 
      when 35 => c := 'Z';
258 
      when others => c := '?';
259 
    end case;
260 
    return c;
261 
  end CHR;
262 
 
263 
 
264 
 
265 
  --------------------------------------------------------------------------
266 
  -- convert INTEGER to STRING using specified base
267 
  --------------------------------------------------------------------------
268 
  function STR(int: INTEGER; base: INTEGER) return STRING is
269 
   variable temp:      STRING(1 to 10);
270 
   variable num:       INTEGER;
271 
   variable abs_int:   INTEGER;
272 
   variable len:       INTEGER := 1;
273 
   variable power:     INTEGER := 1;
274 
  begin
275 
   -- bug fix for negative numbers
276 
   abs_int := abs(int);
277 
   num     := abs_int;
278 
   while num >= base loop
279 
     len := len + 1;
280 
     num := num / base;
281 
   end loop ;
282 
   for i in len downto 1 loop
283 
     temp(i) := chr(abs_int/power mod base);
284 
     power := power * base;
285 
   end loop ;
286 
   -- return result and add sign if required
287 
   if int < 0 then
288 
      return '-'& temp(1 to len);
289 
    else
290 
      return temp(1 to len);
291 
   end if;
292 
  end STR;
293 
 
294 
  ------------------------------------------------
295 
  -- computes DCT1D
296 
  ------------------------------------------------
297 
  function COMPUTE_REF_DCT1D(input_matrix : I_MATRIX_TYPE; shift : BOOLEAN)
298 
  return I_MATRIX_TYPE is
299 
   variable fXm : VECTOR4 := (0.0,0.0,0.0,0.0);
300 
   variable fXs : VECTOR4 := (0.0,0.0,0.0,0.0);
301 
   variable fYe : VECTOR4 := (0.0,0.0,0.0,0.0);
302 
   variable fYo : VECTOR4 := (0.0,0.0,0.0,0.0);
303 
   variable ref_dct_matrix : I_MATRIX_TYPE;
304 
   variable norma_input : MATRIX_TYPE;
305 
  begin
306 
     -- compute reference coefficients
307 
     for x in 0 to N-1 loop
308 
 
309 
       for s in 0 to 7 loop
310 
         if shift = TRUE then
311 
           norma_input(x,s) := (REAL(input_matrix(x,s))- REAL(LEVEL_SHIFT))/2.0;
312 
         else
313 
           norma_input(x,s) := REAL(input_matrix(x,s))/2.0;
314 
         end if;
315 
       end loop;
316 
       fXs(0) := norma_input(x,0)+norma_input(x,7);
317 
       fXs(1) := norma_input(x,1)+norma_input(x,6);
318 
       fXs(2) := norma_input(x,2)+norma_input(x,5);
319 
       fXs(3) := norma_input(x,3)+norma_input(x,4);
320 
 
321 
       fXm(0) := norma_input(x,0)-norma_input(x,7);
322 
       fXm(1) := norma_input(x,1)-norma_input(x,6);
323 
       fXm(2) := norma_input(x,2)-norma_input(x,5);
324 
       fXm(3) := norma_input(x,3)-norma_input(x,4);
325 
 
326 
       for k in 0 to N/2-1 loop
327 
         fYe(k) := REAL(CONV_INTEGER(Ce(k,0)))*fXs(0) +
328 
                   REAL(CONV_INTEGER(Ce(k,1)))*fXs(1) +
329 
                   REAL(CONV_INTEGER(Ce(k,2)))*fXs(2) +
330 
                   REAL(CONV_INTEGER(Ce(k,3)))*fXs(3);
331 
         fYo(k) := REAL(CONV_INTEGER(Co(k,0)))*fXm(0) +
332 
                   REAL(CONV_INTEGER(Co(k,1)))*fXm(1) +
333 
                   REAL(CONV_INTEGER(Co(k,2)))*fXm(2) +
334 
                   REAL(CONV_INTEGER(Co(k,3)))*fXm(3);
335 
       end loop;
336 
 
337 
       -- transpose matrix by writing in row order
338 
       ref_dct_matrix(0,x) := INTEGER(fYe(0)/REAL((2**(COE_W-1))));
339 
       ref_dct_matrix(1,x) := INTEGER(fYo(0)/REAL((2**(COE_W-1))));
340 
       ref_dct_matrix(2,x) := INTEGER(fYe(1)/REAL((2**(COE_W-1))));
341 
       ref_dct_matrix(3,x) := INTEGER(fYo(1)/REAL((2**(COE_W-1))));
342 
       ref_dct_matrix(4,x) := INTEGER(fYe(2)/REAL((2**(COE_W-1))));
343 
       ref_dct_matrix(5,x) := INTEGER(fYo(2)/REAL((2**(COE_W-1))));
344 
       ref_dct_matrix(6,x) := INTEGER(fYe(3)/REAL((2**(COE_W-1))));
345 
       ref_dct_matrix(7,x) := INTEGER(fYo(3)/REAL((2**(COE_W-1))));
346 
 
347 
     end loop;
348 
 
349 
     return ref_dct_matrix;
350 
   end COMPUTE_REF_DCT1D;
351 
 
352 
   -----------------------------------------------
353 
   -- compares NxN matrices, logs failure if difference
354 
   -- greater than maximum error specified
355 
   -----------------------------------------------
356 
   procedure CMP_MATRIX(ref_matrix    : in I_MATRIX_TYPE;
357 
                       dcto_matrix    : in I_MATRIX_TYPE;
358 
                       max_error      : in INTEGER;
359 
                       error_matrix   : out I_MATRIX_TYPE;
360 
                       error_cnt      : inout INTEGER
361 
                       ) is
362 
     variable error_matrix_v : I_MATRIX_TYPE;
363 
   begin
364 
     for a in 0 to N - 1 loop
365 
       for b in 0 to N - 1 loop
366 
         error_matrix_v(a,b) := ref_matrix(a,b) - dcto_matrix(a,b);
367 
         if abs(error_matrix_v(a,b)) > max_error then
368 
           error_cnt := error_cnt + 1;
369 
           assert false
370 
             report "E01: DCT max error violated!"
371 
             severity Error;
372 
         end if;
373 
       end loop;
374 
     end loop;
375 
     error_matrix := error_matrix_v;
376 
  end CMP_MATRIX;
377 
 
378 
  ------------------------------------------------
379 
  -- computes IDCT on NxN matrix
380 
  ------------------------------------------------
381 
  function COMPUTE_REF_IDCT(X : I_MATRIX_TYPE)
382 
  return I_MATRIX_TYPE is
383 
    variable i  : INTEGER := 0;
384 
    variable j  : INTEGER := 0;
385 
    variable u  : INTEGER := 0;
386 
    variable v  : INTEGER := 0;
387 
    variable Cu : REAL;
388 
    variable Cv : REAL;
389 
    variable xi : MATRIX_TYPE := null_data_r;
390 
    variable xr : I_MATRIX_TYPE;
391 
  begin
392 
    -- idct
393 
    for i in 0 to N-1 loop
394 
      for j in 0 to N-1 loop
395 
        for u in 0 to N-1 loop
396 
          if u = 0 then
397 
            Cu := 1.0/sqrt(2.0);
398 
          else
399 
            Cu := 1.0;
400 
          end if;
401 
          for v in 0 to N-1 loop
402 
            if v = 0 then
403 
              Cv := 1.0/sqrt(2.0);
404 
            else
405 
              Cv := 1.0;
406 
            end if;
407 
            xi(i,j) := xi(i,j) +
408 
                     2.0/REAL(N)*Cu*Cv*REAL(X(u,v))*
409 
                     cos( ( (2.0*REAL(i)+1.0)*REAL(u)*MATH_PI ) / (2.0*REAL(N)) )*
410 
                     cos( ( (2.0*REAL(j)+1.0)*REAL(v)*MATH_PI ) / (2.0*REAL(N)) );
411 
            xr(i,j) := INTEGER(ROUND(xi(i,j)))+LEVEL_SHIFT;
412 
          end loop;
413 
        end loop;
414 
      end loop;
415 
    end loop;
416 
    return xr;
417 
  end COMPUTE_REF_IDCT;
418 
 
419 
  ------------------------------------------------
420 
  -- computes peak signal to noise ratio
421 
  -- for reconstruced and input image data
422 
  ------------------------------------------------
423 
  function COMPUTE_PSNR(ref_input : I_MATRIX_TYPE;
424 
                       reconstr_input : I_MATRIX_TYPE) return REAL is
425 
    variable psnr_tmp : REAL := 0.0;
426 
  begin
427 
    for i in 0 to N-1 loop
428 
      for j in 0 to N-1 loop
429 
        psnr_tmp := psnr_tmp + (REAL(ref_input(i,j))-REAL(reconstr_input(i,j)))**2;
430 
      end loop;
431 
    end loop;
432 
    psnr_tmp := psnr_tmp / (REAL(N)*REAL(N));
433 
    psnr_tmp := 10.0*LOG10( (REAL(MAX_PIX_VAL)**2) / psnr_tmp );
434 
    return psnr_tmp;
435 
 
436 
  end COMPUTE_PSNR;
437 
 
438 
  ------------------------------------------------
439 
  -- computes peak signal to noise ratio
440 
  -- for reconstruced and input image data
441 
  ------------------------------------------------
442 
  function COMPUTE_PSNR(ref_input : IMAGE_TYPE;
443 
                       reconstr_input : IMAGE_TYPE;
444 
                       ysize : INTEGER;
445 
                       xsize : INTEGER
446 
                       ) return REAL is
447 
    variable psnr_tmp : REAL := 0.0;
448 
    variable lineb    : LINE;
449 
  begin
450 
    for i in 0 to ysize-1 loop
451 
      for j in 0 to xsize-1 loop
452 
        psnr_tmp := psnr_tmp +
453 
                    (REAL(ref_input(i,j))-REAL(reconstr_input(i,j)))**2;
454 
      end loop;
455 
    end loop;
456 
    psnr_tmp := psnr_tmp / (REAL(ysize)*REAL(xsize));
457 
    --WRITE(lineb,STRING'("MSE Mean Squared Error is "));
458 
    --WRITE(lineb,psnr_tmp);
459 
    --assert false
460 
    --  report lineb.all
461 
    --  severity Note;
462 
    psnr_tmp := 10.0*LOG10( (REAL(MAX_PIX_VAL)**2) / psnr_tmp );
463 
    return psnr_tmp;
464 
 
465 
  end COMPUTE_PSNR;
466 
 
467 
 
468 
end MDCTTB_PKG;

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