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
stats_open_file(stats_io_t * stats,const char * fpf,int pass)19 int 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 #if USE_POSIX_MMAP
30 struct stat stat_buf;
31 int fd;
32
33 fd = open(fpf, O_RDONLY);
34 stats->file = fdopen(fd, "rb");
35 fstat(fd, &stat_buf);
36 stats->buf.sz = stat_buf.st_size;
37 stats->buf.buf = mmap(NULL, stats->buf.sz, PROT_READ, MAP_PRIVATE, fd, 0);
38 res = (stats->buf.buf != NULL);
39 #else
40 size_t nbytes;
41
42 stats->file = fopen(fpf, "rb");
43
44 if (fseek(stats->file, 0, SEEK_END))
45 fatal("First-pass stats file must be seekable!");
46
47 stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);
48 rewind(stats->file);
49
50 stats->buf.buf = malloc(stats->buf_alloc_sz);
51
52 if (!stats->buf.buf)
53 fatal("Failed to allocate first-pass stats buffer (%lu bytes)",
54 (unsigned int)stats->buf_alloc_sz);
55
56 nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
57 res = (nbytes == stats->buf.sz);
58 #endif /* USE_POSIX_MMAP */
59 }
60
61 return res;
62 }
63
stats_open_mem(stats_io_t * stats,int pass)64 int stats_open_mem(stats_io_t *stats, int pass) {
65 int res;
66 stats->pass = pass;
67
68 if (!pass) {
69 stats->buf.sz = 0;
70 stats->buf_alloc_sz = 64 * 1024;
71 stats->buf.buf = malloc(stats->buf_alloc_sz);
72 }
73
74 stats->buf_ptr = stats->buf.buf;
75 res = (stats->buf.buf != NULL);
76 return res;
77 }
78
stats_close(stats_io_t * stats,int last_pass)79 void stats_close(stats_io_t *stats, int last_pass) {
80 if (stats->file) {
81 if (stats->pass == last_pass) {
82 #if USE_POSIX_MMAP
83 munmap(stats->buf.buf, stats->buf.sz);
84 #else
85 free(stats->buf.buf);
86 #endif /* USE_POSIX_MMAP */
87 }
88
89 fclose(stats->file);
90 stats->file = NULL;
91 } else {
92 if (stats->pass == last_pass)
93 free(stats->buf.buf);
94 }
95 }
96
stats_write(stats_io_t * stats,const void * pkt,size_t len)97 void stats_write(stats_io_t *stats, const void *pkt, size_t len) {
98 if (stats->file) {
99 (void) fwrite(pkt, 1, len, stats->file);
100 } else {
101 if (stats->buf.sz + len > stats->buf_alloc_sz) {
102 size_t new_sz = stats->buf_alloc_sz + 64 * 1024;
103 char *new_ptr = realloc(stats->buf.buf, new_sz);
104
105 if (new_ptr) {
106 stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);
107 stats->buf.buf = new_ptr;
108 stats->buf_alloc_sz = new_sz;
109 } else {
110 fatal("Failed to realloc firstpass stats buffer.");
111 }
112 }
113
114 memcpy(stats->buf_ptr, pkt, len);
115 stats->buf.sz += len;
116 stats->buf_ptr += len;
117 }
118 }
119
stats_get(stats_io_t * stats)120 vpx_fixed_buf_t stats_get(stats_io_t *stats) {
121 return stats->buf;
122 }
123