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498 lines
14 KiB
C
498 lines
14 KiB
C
/* DCT test. (c) 2001 Fabrice Bellard.
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Started from sample code by Juan J. Sierralta P.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <getopt.h>
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#include "dsputil.h"
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#include "i386/mmx.h"
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#include "simple_idct.h"
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/* reference fdct/idct */
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extern void fdct(DCTELEM *block);
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extern void idct(DCTELEM *block);
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extern void init_fdct();
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extern void j_rev_dct(DCTELEM *data);
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extern void ff_mmx_idct(DCTELEM *data);
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extern void ff_mmxext_idct(DCTELEM *data);
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extern void odivx_idct_c (short *block);
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void (*add_pixels_clamped)(const DCTELEM *block/*align 16*/,
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UINT8 *pixels/*align 8*/, int line_size);
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void (*put_pixels_clamped)(const DCTELEM *block/*align 16*/,
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UINT8 *pixels/*align 8*/, int line_size);
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#define AANSCALE_BITS 12
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static const unsigned short aanscales[64] = {
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/* precomputed values scaled up by 14 bits */
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16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
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22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
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21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
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19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
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16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
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12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
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8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
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4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
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};
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UINT8 cropTbl[256 + 2 * MAX_NEG_CROP];
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INT64 gettime(void)
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{
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struct timeval tv;
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gettimeofday(&tv,NULL);
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return (INT64)tv.tv_sec * 1000000 + tv.tv_usec;
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}
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#define NB_ITS 20000
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#define NB_ITS_SPEED 50000
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static short idct_mmx_perm[64];
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static short idct_simple_mmx_perm[64]={
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0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
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0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
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0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
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0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
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0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
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0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
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0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
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0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
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};
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void idct_mmx_init(void)
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{
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int i;
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/* the mmx/mmxext idct uses a reordered input, so we patch scan tables */
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for (i = 0; i < 64; i++) {
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idct_mmx_perm[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
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// idct_simple_mmx_perm[i] = simple_block_permute_op(i);
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}
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}
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static DCTELEM block[64] __attribute__ ((aligned (8)));
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static DCTELEM block1[64] __attribute__ ((aligned (8)));
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static DCTELEM block_org[64] __attribute__ ((aligned (8)));
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void dct_error(const char *name, int is_idct,
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void (*fdct_func)(DCTELEM *block),
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void (*fdct_ref)(DCTELEM *block), int test)
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{
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int it, i, scale;
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int err_inf, v;
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INT64 err2, ti, ti1, it1;
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INT64 sysErr[64], sysErrMax=0;
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int maxout=0;
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int blockSumErrMax=0, blockSumErr;
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srandom(0);
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err_inf = 0;
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err2 = 0;
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for(i=0; i<64; i++) sysErr[i]=0;
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for(it=0;it<NB_ITS;it++) {
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for(i=0;i<64;i++)
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block1[i] = 0;
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switch(test){
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case 0:
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for(i=0;i<64;i++)
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block1[i] = (random() % 512) -256;
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if (is_idct){
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fdct(block1);
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for(i=0;i<64;i++)
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block1[i]>>=3;
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}
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break;
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case 1:{
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int num= (random()%10)+1;
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for(i=0;i<num;i++)
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block1[random()%64] = (random() % 512) -256;
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}break;
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case 2:
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block1[0]= (random()%4096)-2048;
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block1[63]= (block1[0]&1)^1;
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break;
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}
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#if 0 // simulate mismatch control
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{ int sum=0;
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for(i=0;i<64;i++)
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sum+=block1[i];
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if((sum&1)==0) block1[63]^=1;
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}
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#endif
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for(i=0; i<64; i++)
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block_org[i]= block1[i];
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if (fdct_func == ff_mmx_idct ||
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fdct_func == j_rev_dct || fdct_func == ff_mmxext_idct) {
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for(i=0;i<64;i++)
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block[idct_mmx_perm[i]] = block1[i];
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} else if(fdct_func == ff_simple_idct_mmx ) {
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for(i=0;i<64;i++)
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block[idct_simple_mmx_perm[i]] = block1[i];
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} else {
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for(i=0; i<64; i++)
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block[i]= block1[i];
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}
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#if 0 // simulate mismatch control for tested IDCT but not the ref
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{ int sum=0;
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for(i=0;i<64;i++)
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sum+=block[i];
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if((sum&1)==0) block[63]^=1;
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}
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#endif
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fdct_func(block);
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emms(); /* for ff_mmx_idct */
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if (fdct_func == fdct_ifast) {
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for(i=0; i<64; i++) {
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scale = 8*(1 << (AANSCALE_BITS + 11)) / aanscales[i];
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block[i] = (block[i] * scale /*+ (1<<(AANSCALE_BITS-1))*/) >> AANSCALE_BITS;
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}
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}
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fdct_ref(block1);
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blockSumErr=0;
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for(i=0;i<64;i++) {
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v = abs(block[i] - block1[i]);
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if (v > err_inf)
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err_inf = v;
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err2 += v * v;
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sysErr[i] += block[i] - block1[i];
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blockSumErr += v;
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if( abs(block[i])>maxout) maxout=abs(block[i]);
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}
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if(blockSumErrMax < blockSumErr) blockSumErrMax= blockSumErr;
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#if 0 // print different matrix pairs
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if(blockSumErr){
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printf("\n");
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for(i=0; i<64; i++){
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if((i&7)==0) printf("\n");
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printf("%4d ", block_org[i]);
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}
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for(i=0; i<64; i++){
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if((i&7)==0) printf("\n");
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printf("%4d ", block[i] - block1[i]);
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}
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}
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#endif
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}
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for(i=0; i<64; i++) sysErrMax= MAX(sysErrMax, ABS(sysErr[i]));
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#if 1 // dump systematic errors
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for(i=0; i<64; i++){
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if(i%8==0) printf("\n");
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printf("%5d ", (int)sysErr[i]);
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}
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printf("\n");
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#endif
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printf("%s %s: err_inf=%d err2=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
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is_idct ? "IDCT" : "DCT",
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name, err_inf, (double)err2 / NB_ITS / 64.0, (double)sysErrMax / NB_ITS, maxout, blockSumErrMax);
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#if 1 //Speed test
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/* speed test */
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for(i=0;i<64;i++)
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block1[i] = 0;
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switch(test){
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case 0:
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for(i=0;i<64;i++)
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block1[i] = (random() % 512) -256;
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if (is_idct){
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fdct(block1);
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for(i=0;i<64;i++)
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block1[i]>>=3;
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}
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break;
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case 1:{
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case 2:
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block1[0] = (random() % 512) -256;
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block1[1] = (random() % 512) -256;
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block1[2] = (random() % 512) -256;
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block1[3] = (random() % 512) -256;
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}break;
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}
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if (fdct_func == ff_mmx_idct ||
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fdct_func == j_rev_dct || fdct_func == ff_mmxext_idct) {
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for(i=0;i<64;i++)
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block[idct_mmx_perm[i]] = block1[i];
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} else if(fdct_func == ff_simple_idct_mmx ) {
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for(i=0;i<64;i++)
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block[idct_simple_mmx_perm[i]] = block1[i];
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} else {
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for(i=0; i<64; i++)
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block[i]= block1[i];
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}
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ti = gettime();
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it1 = 0;
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do {
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for(it=0;it<NB_ITS_SPEED;it++) {
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for(i=0; i<64; i++)
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block[i]= block1[i];
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// memcpy(block, block1, sizeof(DCTELEM) * 64);
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// dont memcpy especially not fastmemcpy because it does movntq !!!
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fdct_func(block);
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}
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it1 += NB_ITS_SPEED;
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ti1 = gettime() - ti;
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} while (ti1 < 1000000);
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emms();
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printf("%s %s: %0.1f kdct/s\n",
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is_idct ? "IDCT" : "DCT",
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name, (double)it1 * 1000.0 / (double)ti1);
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#endif
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}
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static UINT8 img_dest[64] __attribute__ ((aligned (8)));
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static UINT8 img_dest1[64] __attribute__ ((aligned (8)));
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void idct248_ref(UINT8 *dest, int linesize, INT16 *block)
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{
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static int init;
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static double c8[8][8];
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static double c4[4][4];
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double block1[64], block2[64], block3[64];
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double s, sum, v;
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int i, j, k;
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if (!init) {
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init = 1;
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for(i=0;i<8;i++) {
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sum = 0;
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for(j=0;j<8;j++) {
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s = (i==0) ? sqrt(1.0/8.0) : sqrt(1.0/4.0);
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c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
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sum += c8[i][j] * c8[i][j];
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}
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}
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for(i=0;i<4;i++) {
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sum = 0;
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for(j=0;j<4;j++) {
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s = (i==0) ? sqrt(1.0/4.0) : sqrt(1.0/2.0);
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c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
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sum += c4[i][j] * c4[i][j];
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}
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}
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}
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/* butterfly */
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for(i=0;i<4;i++) {
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for(j=0;j<8;j++) {
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block1[8*(2*i)+j] = (block[8*(2*i)+j] + block[8*(2*i+1)+j]) * 0.5;
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block1[8*(2*i+1)+j] = (block[8*(2*i)+j] - block[8*(2*i+1)+j]) * 0.5;
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}
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}
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/* idct8 on lines */
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for(i=0;i<8;i++) {
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for(j=0;j<8;j++) {
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sum = 0;
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for(k=0;k<8;k++)
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sum += c8[k][j] * block1[8*i+k];
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block2[8*i+j] = sum;
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}
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}
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/* idct4 */
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for(i=0;i<8;i++) {
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for(j=0;j<4;j++) {
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/* top */
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sum = 0;
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for(k=0;k<4;k++)
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sum += c4[k][j] * block2[8*(2*k)+i];
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block3[8*(2*j)+i] = sum;
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/* bottom */
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sum = 0;
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for(k=0;k<4;k++)
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sum += c4[k][j] * block2[8*(2*k+1)+i];
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block3[8*(2*j+1)+i] = sum;
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}
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}
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/* clamp and store the result */
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for(i=0;i<8;i++) {
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for(j=0;j<8;j++) {
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v = block3[8*i+j] + 128.0;
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if (v < 0)
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v = 0;
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else if (v > 255)
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v = 255;
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dest[i * linesize + j] = (int)rint(v);
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}
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}
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}
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void idct248_error(const char *name,
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void (*idct248_put)(UINT8 *dest, int line_size, INT16 *block))
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{
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int it, i, it1, ti, ti1, err_max, v;
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srandom(0);
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/* just one test to see if code is correct (precision is less
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important here) */
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err_max = 0;
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for(it=0;it<NB_ITS;it++) {
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for(i=0;i<64;i++)
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block1[i] = (random() % 512) - 256;
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for(i=0; i<64; i++)
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block[i]= block1[i];
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idct248_ref(img_dest1, 8, block);
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#if 0
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printf("ref=\n");
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for(i=0;i<8;i++) {
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int j;
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for(j=0;j<8;j++) {
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printf(" %3d", img_dest1[i*8+j]);
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}
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printf("\n");
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}
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#endif
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for(i=0; i<64; i++)
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block[i]= block1[i];
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idct248_put(img_dest, 8, block);
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#if 0
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printf("out=\n");
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for(i=0;i<8;i++) {
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int j;
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for(j=0;j<8;j++) {
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printf(" %3d", img_dest[i*8+j]);
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}
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printf("\n");
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}
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#endif
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for(i=0;i<64;i++) {
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v = abs(img_dest[i] - img_dest1[i]);
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if (v > err_max)
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err_max = v;
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}
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}
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printf("%s %s: err_inf=%d\n",
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1 ? "IDCT248" : "DCT248",
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name, err_max);
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ti = gettime();
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it1 = 0;
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do {
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for(it=0;it<NB_ITS_SPEED;it++) {
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for(i=0; i<64; i++)
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block[i]= block1[i];
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// memcpy(block, block1, sizeof(DCTELEM) * 64);
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// dont memcpy especially not fastmemcpy because it does movntq !!!
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idct248_put(img_dest, 8, block);
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}
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it1 += NB_ITS_SPEED;
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ti1 = gettime() - ti;
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} while (ti1 < 1000000);
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emms();
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printf("%s %s: %0.1f kdct/s\n",
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1 ? "IDCT248" : "DCT248",
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name, (double)it1 * 1000.0 / (double)ti1);
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}
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void help(void)
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{
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printf("dct-test [-i] [<test-number>]\n"
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"test-number 0 -> test with random matrixes\n"
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" 1 -> test with random sparse matrixes\n"
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" 2 -> do 3. test from mpeg4 std\n"
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"-i test IDCT implementations\n"
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"-4 test IDCT248 implementations\n");
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exit(1);
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}
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int main(int argc, char **argv)
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{
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int test_idct = 0, test_248_dct = 0;
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int c,i;
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int test=1;
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init_fdct();
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idct_mmx_init();
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for(i=0;i<256;i++) cropTbl[i + MAX_NEG_CROP] = i;
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for(i=0;i<MAX_NEG_CROP;i++) {
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cropTbl[i] = 0;
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cropTbl[i + MAX_NEG_CROP + 256] = 255;
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}
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for(;;) {
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c = getopt(argc, argv, "ih4");
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if (c == -1)
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break;
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switch(c) {
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case 'i':
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test_idct = 1;
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break;
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case '4':
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test_248_dct = 1;
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break;
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default :
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case 'h':
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help();
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break;
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}
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}
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if(optind <argc) test= atoi(argv[optind]);
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printf("ffmpeg DCT/IDCT test\n");
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if (test_248_dct) {
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idct248_error("SIMPLE-C", simple_idct248_put);
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} else {
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if (!test_idct) {
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dct_error("REF-DBL", 0, fdct, fdct, test); /* only to verify code ! */
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dct_error("IJG-AAN-INT", 0, fdct_ifast, fdct, test);
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dct_error("IJG-LLM-INT", 0, ff_jpeg_fdct_islow, fdct, test);
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dct_error("MMX", 0, ff_fdct_mmx, fdct, test);
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} else {
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dct_error("REF-DBL", 1, idct, idct, test);
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dct_error("INT", 1, j_rev_dct, idct, test);
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dct_error("LIBMPEG2-MMX", 1, ff_mmx_idct, idct, test);
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dct_error("LIBMPEG2-MMXEXT", 1, ff_mmxext_idct, idct, test);
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dct_error("SIMPLE-C", 1, simple_idct, idct, test);
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dct_error("SIMPLE-MMX", 1, ff_simple_idct_mmx, idct, test);
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// dct_error("ODIVX-C", 1, odivx_idct_c, idct);
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//printf(" test against odivx idct\n");
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// dct_error("REF", 1, idct, odivx_idct_c);
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// dct_error("INT", 1, j_rev_dct, odivx_idct_c);
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// dct_error("MMX", 1, ff_mmx_idct, odivx_idct_c);
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// dct_error("MMXEXT", 1, ff_mmxext_idct, odivx_idct_c);
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// dct_error("SIMPLE-C", 1, simple_idct, odivx_idct_c);
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// dct_error("SIMPLE-MMX", 1, ff_simple_idct_mmx, odivx_idct_c);
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// dct_error("ODIVX-C", 1, odivx_idct_c, odivx_idct_c);
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}
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}
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return 0;
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}
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