1/*
2 *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "./vpxstats.h"
12
13#include <math.h>
14#include <stdlib.h>
15#include <string.h>
16
17#include "./tools_common.h"
18
19int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
20  int res;
21  stats->pass = pass;
22
23  if (pass == 0) {
24    stats->file = fopen(fpf, "wb");
25    stats->buf.sz = 0;
26    stats->buf.buf = NULL;
27    res = (stats->file != NULL);
28  } else {
29    size_t nbytes;
30
31    stats->file = fopen(fpf, "rb");
32
33    if (stats->file == NULL) fatal("First-pass stats file does not exist!");
34
35    if (fseek(stats->file, 0, SEEK_END))
36      fatal("First-pass stats file must be seekable!");
37
38    stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);
39    rewind(stats->file);
40
41    stats->buf.buf = malloc(stats->buf_alloc_sz);
42
43    if (!stats->buf.buf)
44      fatal("Failed to allocate first-pass stats buffer (%lu bytes)",
45            (unsigned int)stats->buf_alloc_sz);
46
47    nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
48    res = (nbytes == stats->buf.sz);
49  }
50
51  return res;
52}
53
54int stats_open_mem(stats_io_t *stats, int pass) {
55  int res;
56  stats->pass = pass;
57
58  if (!pass) {
59    stats->buf.sz = 0;
60    stats->buf_alloc_sz = 64 * 1024;
61    stats->buf.buf = malloc(stats->buf_alloc_sz);
62  }
63
64  stats->buf_ptr = stats->buf.buf;
65  res = (stats->buf.buf != NULL);
66  return res;
67}
68
69void stats_close(stats_io_t *stats, int last_pass) {
70  if (stats->file) {
71    if (stats->pass == last_pass) {
72      free(stats->buf.buf);
73    }
74
75    fclose(stats->file);
76    stats->file = NULL;
77  } else {
78    if (stats->pass == last_pass) free(stats->buf.buf);
79  }
80}
81
82void stats_write(stats_io_t *stats, const void *pkt, size_t len) {
83  if (stats->file) {
84    (void)fwrite(pkt, 1, len, stats->file);
85  } else {
86    if (stats->buf.sz + len > stats->buf_alloc_sz) {
87      size_t new_sz = stats->buf_alloc_sz + 64 * 1024;
88      char *new_ptr = realloc(stats->buf.buf, new_sz);
89
90      if (new_ptr) {
91        stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);
92        stats->buf.buf = new_ptr;
93        stats->buf_alloc_sz = new_sz;
94      } else {
95        fatal("Failed to realloc firstpass stats buffer.");
96      }
97    }
98
99    memcpy(stats->buf_ptr, pkt, len);
100    stats->buf.sz += len;
101    stats->buf_ptr += len;
102  }
103}
104
105vpx_fixed_buf_t stats_get(stats_io_t *stats) { return stats->buf; }
106