#include <string.h>
#include <sys/time.h>
#include <unistd.h>
+#include <getopt.h>
#include "dsputil.h"
+#include "i386/mmx.h"
+
+/* reference fdct/idct */
extern void fdct(DCTELEM *block);
+extern void idct(DCTELEM *block);
extern void init_fdct();
+extern void j_rev_dct(DCTELEM *data);
+extern void ff_mmx_idct(DCTELEM *data);
+extern void ff_mmxext_idct(DCTELEM *data);
+
#define AANSCALE_BITS 12
static const unsigned short aanscales[64] = {
/* precomputed values scaled up by 14 bits */
#define NB_ITS 20000
#define NB_ITS_SPEED 50000
-void dct_error(const char *name,
- void (*fdct_func)(DCTELEM *block))
+static short idct_mmx_perm[64];
+
+void idct_mmx_init(void)
+{
+ int i;
+
+ /* the mmx/mmxext idct uses a reordered input, so we patch scan tables */
+ for (i = 0; i < 64; i++) {
+ idct_mmx_perm[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
+ }
+}
+
+static DCTELEM block[64] __attribute__ ((aligned (8)));
+static DCTELEM block1[64] __attribute__ ((aligned (8)));
+
+void dct_error(const char *name, int is_idct,
+ void (*fdct_func)(DCTELEM *block),
+ void (*fdct_ref)(DCTELEM *block))
{
int it, i, scale;
- DCTELEM block[64], block1[64];
int err_inf, v;
INT64 err2, ti, ti1, it1;
for(it=0;it<NB_ITS;it++) {
for(i=0;i<64;i++)
block1[i] = random() % 256;
- memcpy(block, block1, sizeof(DCTELEM) * 64);
-
+
+ /* for idct test, generate inverse idct data */
+ if (is_idct)
+ fdct(block1);
+
+ if (fdct_func == ff_mmx_idct ||
+ fdct_func == j_rev_dct) {
+ for(i=0;i<64;i++)
+ block[idct_mmx_perm[i]] = block1[i];
+ } else {
+ memcpy(block, block1, sizeof(DCTELEM) * 64);
+ }
+
fdct_func(block);
+ emms(); /* for ff_mmx_idct */
+
if (fdct_func == jpeg_fdct_ifast) {
for(i=0; i<64; i++) {
scale = (1 << (AANSCALE_BITS + 11)) / aanscales[i];
}
}
- fdct(block1);
+ fdct_ref(block1);
for(i=0;i<64;i++) {
v = abs(block[i] - block1[i]);
err2 += v * v;
}
}
- printf("DCT %s: err_inf=%d err2=%0.2f\n",
+ printf("%s %s: err_inf=%d err2=%0.2f\n",
+ is_idct ? "IDCT" : "DCT",
name, err_inf, (double)err2 / NB_ITS / 64.0);
/* speed test */
for(i=0;i<64;i++)
block1[i] = 255 - 63 + i;
+ /* for idct test, generate inverse idct data */
+ if (is_idct)
+ fdct(block1);
+ if (fdct_func == ff_mmx_idct ||
+ fdct_func == j_rev_dct) {
+ for(i=0;i<64;i++)
+ block[idct_mmx_perm[i]] = block1[i];
+ }
+
ti = gettime();
it1 = 0;
do {
it1 += NB_ITS_SPEED;
ti1 = gettime() - ti;
} while (ti1 < 1000000);
+ emms();
- printf("DCT %s: %0.1f kdct/s\n",
+ printf("%s %s: %0.1f kdct/s\n",
+ is_idct ? "IDCT" : "DCT",
name, (double)it1 * 1000.0 / (double)ti1);
}
+void help(void)
+{
+ printf("dct-test [-i]\n"
+ "test DCT implementations\n");
+ exit(1);
+}
+
int main(int argc, char **argv)
{
+ int test_idct = 0;
+ int c;
+
init_fdct();
-
- printf("ffmpeg DCT test\n");
+ idct_mmx_init();
- dct_error("REF", fdct); /* only to verify code ! */
- dct_error("AAN", jpeg_fdct_ifast);
- dct_error("MMX", fdct_mmx);
+ for(;;) {
+ c = getopt(argc, argv, "ih");
+ if (c == -1)
+ break;
+ switch(c) {
+ case 'i':
+ test_idct = 1;
+ break;
+ case 'h':
+ help();
+ break;
+ }
+ }
+
+ printf("ffmpeg DCT/IDCT test\n");
+
+ if (!test_idct) {
+ dct_error("REF", 0, fdct, fdct); /* only to verify code ! */
+ dct_error("AAN", 0, jpeg_fdct_ifast, fdct);
+ dct_error("MMX", 0, fdct_mmx, fdct);
+ } else {
+ dct_error("REF", 1, idct, idct);
+ dct_error("INT", 1, j_rev_dct, idct);
+ dct_error("MMX", 1, ff_mmx_idct, idct);
+ // dct_error("MMX", 1, ff_mmxext_idct, idct);
+ }
return 0;
}
-