/* *  Copyright (c) 2013 The WebM project authors. All Rights Reserved. * *  Use of this source code is governed by a BSD-style license *  that can be found in the LICENSE file in the root of the source *  tree. An additional intellectual property rights grant can be found *  in the file PATENTS.  All contributing project authors may *  be found in the AUTHORS file in the root of the source tree. */ #include "./vpxstats.h" #include <math.h>#include <stdlib.h>#include <string.h> #include "./tools_common.h" int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {  int res;  stats->pass = pass;   if (pass == 0) {    stats->file = fopen(fpf, "wb");    stats->buf.sz = 0;    stats->buf.buf = NULL;    res = (stats->file != 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!");     stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);    rewind(stats->file);     stats->buf.buf = malloc(stats->buf_alloc_sz);     if (!stats->buf.buf)      fatal("Failed to allocate first-pass stats buffer (%lu bytes)",            (unsigned int)stats->buf_alloc_sz);     nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);    res = (nbytes == stats->buf.sz);  }   return res;} int stats_open_mem(stats_io_t *stats, int pass) {  int res;  stats->pass = pass;   if (!pass) {    stats->buf.sz = 0;    stats->buf_alloc_sz = 64 * 1024;    stats->buf.buf = malloc(stats->buf_alloc_sz);  }   stats->buf_ptr = stats->buf.buf;  res = (stats->buf.buf != NULL);  return res;} void stats_close(stats_io_t *stats, int last_pass) {  if (stats->file) {    if (stats->pass == last_pass) {      free(stats->buf.buf);    }     fclose(stats->file);    stats->file = NULL;  } else {    if (stats->pass == last_pass) free(stats->buf.buf);  }} void stats_write(stats_io_t *stats, const void *pkt, size_t len) {  if (stats->file) {    (void)fwrite(pkt, 1, len, stats->file);  } else {    if (stats->buf.sz + len > stats->buf_alloc_sz) {      size_t new_sz = stats->buf_alloc_sz + 64 * 1024;      char *new_ptr = realloc(stats->buf.buf, new_sz);       if (new_ptr) {        stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);        stats->buf.buf = new_ptr;        stats->buf_alloc_sz = new_sz;      } else {        fatal("Failed to realloc firstpass stats buffer.");      }    }     memcpy(stats->buf_ptr, pkt, len);    stats->buf.sz += len;    stats->buf_ptr += len;  }} vpx_fixed_buf_t stats_get(stats_io_t *stats) { return stats->buf; }