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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/time.h>
#include <errno.h>
#include <libipe.h>
int read_raw_file(const char *filename, char **buffer, size_t *length)
{
FILE *fp = fopen(filename, "rb");
if (fp == NULL)
return ENOENT;
fseek(fp, 0, SEEK_END);
*length = ftell(fp);
rewind(fp);
*buffer = (char *) malloc(*length);
if (*buffer == NULL) {
fclose(fp);
return ENOMEM;
}
size_t buffer_length = fread(*buffer, 1, *length, fp);
fclose(fp);
if (buffer_length != *length) {
free(buffer);
return ERANGE;
}
return 0;
}
int main(int argc, char const* argv[])
{
if (argc < 3) {
fprintf(stderr, "Usage: ipedec <filename> <number of lines per frame>\n");
return EXIT_FAILURE;
}
char *buffer = NULL;
size_t num_bytes = 0;
if (read_raw_file(argv[1], &buffer, &num_bytes))
return EXIT_FAILURE;
const int rows = atoi(argv[2]);
ipe_decoder decoder = ipe_decoder_new(rows, (uint32_t *) buffer, num_bytes);
int err = 0;
uint16_t *pixels = (uint16_t *) malloc(2048 * rows * sizeof(uint16_t));
uint32_t frame_number, time_stamp;
int num_frames = 0;
struct timeval start, end;
long seconds = 0L, useconds = 0L;
FILE *fp = fopen("test.raw", "wb");
while (!err) {
gettimeofday(&start, NULL);
err = ipe_decoder_get_next_frame(decoder, &pixels, &frame_number, &time_stamp);
gettimeofday(&end, NULL);
if (!err) {
num_frames++;
seconds += end.tv_sec - start.tv_sec;
useconds += end.tv_usec - start.tv_usec;
fwrite(pixels, sizeof(uint16_t), 2048 * 1088, fp);
}
}
fclose(fp);
float mtime = seconds * 1000.0 + useconds / 1000.0;
printf("Decoded %i frames in %.5fms\n", num_frames, mtime);
free(pixels);
ipe_decoder_free(decoder);
free(buffer);
return 0;
}
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