mirror of
https://github.com/ultravideo/uvg266.git
synced 2024-11-23 18:14:06 +00:00
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define BUFSZ (64 * 64 * sizeof(uint16_t))
|
|
#define NUM_COEFF_BUCKETS (4)
|
|
#define NUM_OTHER_BUCKETS (0)
|
|
#define NUM_TOTAL_BUCKETS ((NUM_COEFF_BUCKETS) + (NUM_OTHER_BUCKETS))
|
|
#define MAX_COEFF_BUCKET ((NUM_COEFF_BUCKETS) - 1)
|
|
|
|
#define clz(x) __builtin_clz(x)
|
|
#define ilog2(x) (sizeof(x) * 8 - clz(x) - 1)
|
|
|
|
void print_coeffs(const int16_t *buf, uint32_t size, uint32_t ccc)
|
|
{
|
|
uint32_t i;
|
|
printf("Buf size %u, ccc %u\n", size, ccc);
|
|
for (i = 0; i < size; i++)
|
|
printf("%i ", buf[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
void count_coeffs(const int16_t *buf, uint32_t size, uint64_t *buckets, uint64_t *num_signs, uint16_t *excess)
|
|
{
|
|
*excess = 0;
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
int16_t curr = buf[i];
|
|
int16_t is_signed = curr >> 15;
|
|
*num_signs += (is_signed & 1);
|
|
|
|
uint16_t abs = (curr ^ is_signed) - is_signed;
|
|
if (abs > MAX_COEFF_BUCKET) {
|
|
*excess += abs - MAX_COEFF_BUCKET;
|
|
abs = MAX_COEFF_BUCKET;
|
|
}
|
|
|
|
buckets[abs]++;
|
|
}
|
|
}
|
|
|
|
void print_buckets(const uint64_t *buckets, uint64_t num_signs)
|
|
{
|
|
uint32_t i;
|
|
for (i = 0; i < NUM_COEFF_BUCKETS; i++)
|
|
printf("%3u: %lu\n", i, buckets[i]);
|
|
printf("Signs: %lu\n", num_signs);
|
|
}
|
|
|
|
void update_matrix(const uint64_t *buckets, uint64_t *mat)
|
|
{
|
|
for (int y = 0; y < NUM_TOTAL_BUCKETS; y++) {
|
|
for (int x = 0; x < NUM_TOTAL_BUCKETS; x++) {
|
|
int curr_pos = y * NUM_TOTAL_BUCKETS + x;
|
|
mat[curr_pos] += buckets[x] * buckets[y];
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline int is_power_of_two(uint32_t u)
|
|
{
|
|
return (u & (u - 1)) == 0;
|
|
}
|
|
|
|
int process_rdcosts(FILE *in, FILE *out)
|
|
{
|
|
void *buf = malloc(BUFSZ);
|
|
uint32_t *u32buf = (uint32_t *)buf;
|
|
int16_t *i16buf = (int16_t *)buf;
|
|
int rv = 0;
|
|
|
|
float weights[NUM_TOTAL_BUCKETS] = {0.0f};
|
|
|
|
uint64_t mat[NUM_TOTAL_BUCKETS * NUM_TOTAL_BUCKETS] = {0};
|
|
|
|
while (!feof(in)) {
|
|
uint32_t size, ccc, size_sqrt;
|
|
uint64_t cg_buckets[NUM_TOTAL_BUCKETS] = {0};
|
|
uint64_t cg_num_signs = 0;
|
|
uint16_t excess = 0;
|
|
size_t n_read;
|
|
|
|
n_read = fread(buf, sizeof(uint32_t), 2, in);
|
|
size = u32buf[0];
|
|
ccc = u32buf[1];
|
|
|
|
// Can't rely on feof() alone when reading from a pipe that might only get
|
|
// closed long after the last data has been poured in
|
|
if (n_read == 0) {
|
|
break;
|
|
}
|
|
if (feof(in) || n_read < 2) {
|
|
fprintf(stderr, "Unexpected EOF when reading header, managed still to read %u u32's\n", n_read);
|
|
rv = 1;
|
|
goto out;
|
|
}
|
|
if (!is_power_of_two(size)) {
|
|
fprintf(stderr, "Errorneous block size %u\n", size);
|
|
rv = 1;
|
|
goto out;
|
|
}
|
|
|
|
size_sqrt = 1 << (ilog2(size) >> 1);
|
|
n_read = fread(buf, sizeof(int16_t), size, in);
|
|
if (n_read != size) {
|
|
fprintf(stderr, "Unexpected EOF when reading block, managed still to read %u i16's\n", n_read);
|
|
rv = 1;
|
|
goto out;
|
|
}
|
|
|
|
count_coeffs(i16buf, size, cg_buckets, &cg_num_signs, &excess);
|
|
update_matrix(cg_buckets, mat);
|
|
}
|
|
for (int y = 0; y < NUM_TOTAL_BUCKETS; y++) {
|
|
for (int x = 0; x < NUM_TOTAL_BUCKETS; x++) {
|
|
int curr_pos = y * NUM_TOTAL_BUCKETS + x;
|
|
printf("%lu ", mat[curr_pos]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
fflush(stdout);
|
|
|
|
out:
|
|
free(buf);
|
|
return rv;
|
|
}
|
|
|
|
int main(int ar, char **av)
|
|
{
|
|
return process_rdcosts(stdin, stdout);
|
|
}
|