stats->buf.buf = NULL;
res = (stats->file != NULL);
} else {
-#if USE_POSIX_MMAP
- struct stat stat_buf;
- int fd;
-
- fd = open(fpf, O_RDONLY);
- stats->file = fdopen(fd, "rb");
- fstat(fd, &stat_buf);
- stats->buf.sz = stat_buf.st_size;
- stats->buf.buf = mmap(NULL, stats->buf.sz, PROT_READ, MAP_PRIVATE, fd, 0);
- res = (stats->buf.buf != NULL);
-#else
size_t nbytes;
stats->file = fopen(fpf, "rb");
+ if (stats->file == NULL)
+ fatal("First-pass stats file does not exist!");
+
if (fseek(stats->file, 0, SEEK_END))
fatal("First-pass stats file must be seekable!");
nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
res = (nbytes == stats->buf.sz);
-#endif /* USE_POSIX_MMAP */
}
return res;
void stats_close(stats_io_t *stats, int last_pass) {
if (stats->file) {
if (stats->pass == last_pass) {
-#if USE_POSIX_MMAP
- munmap(stats->buf.buf, stats->buf.sz);
-#else
free(stats->buf.buf);
-#endif /* USE_POSIX_MMAP */
}
fclose(stats->file);
vpx_fixed_buf_t stats_get(stats_io_t *stats) {
return stats->buf;
}
-
-double vp8_mse2psnr(double samples, double peak, double mse) {
- const int kMaxPSNR = 100;
- double psnr = kMaxPSNR;
-
- if (mse > 0.0)
- psnr = 10.0 * log10(peak * peak * samples / mse);
-
- if (psnr > kMaxPSNR)
- psnr = kMaxPSNR;
-
- return psnr;
-}