vpxstats.c

   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
  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 (stats->file == NULL)
  45       fatal("First-pass stats file does not exist!");
  46
  47     if (fseek(stats->file, 0, SEEK_END))
  48       fatal("First-pass stats file must be seekable!");
  49
  50     stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);
  51     rewind(stats->file);
  52
  53     stats->buf.buf = malloc(stats->buf_alloc_sz);
  54
  55     if (!stats->buf.buf)
  56       fatal("Failed to allocate first-pass stats buffer (%lu bytes)",
  57             (unsigned int)stats->buf_alloc_sz);
  58
  59     nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
  60     res = (nbytes == stats->buf.sz);
  61 #endif  /* USE_POSIX_MMAP */
  62   }
  63
  64   return res;
  65 }
  66
  67 int stats_open_mem(stats_io_t *stats, int pass) {
  68   int res;
  69   stats->pass = pass;
  70
  71   if (!pass) {
  72     stats->buf.sz = 0;
  73     stats->buf_alloc_sz = 64 * 1024;
  74     stats->buf.buf = malloc(stats->buf_alloc_sz);
  75   }
  76
  77   stats->buf_ptr = stats->buf.buf;
  78   res = (stats->buf.buf != NULL);
  79   return res;
  80 }
  81
  82 void stats_close(stats_io_t *stats, int last_pass) {
  83   if (stats->file) {
  84     if (stats->pass == last_pass) {
  85 #if USE_POSIX_MMAP
  86       munmap(stats->buf.buf, stats->buf.sz);
  87 #else
  88       free(stats->buf.buf);
  89 #endif  /* USE_POSIX_MMAP */
  90     }
  91
  92     fclose(stats->file);
  93     stats->file = NULL;
  94   } else {
  95     if (stats->pass == last_pass)
  96       free(stats->buf.buf);
  97   }
  98 }
  99
 100 void stats_write(stats_io_t *stats, const void *pkt, size_t len) {
 101   if (stats->file) {
 102     (void) fwrite(pkt, 1, len, stats->file);
 103   } else {
 104     if (stats->buf.sz + len > stats->buf_alloc_sz) {
 105       size_t  new_sz = stats->buf_alloc_sz + 64 * 1024;
 106       char   *new_ptr = realloc(stats->buf.buf, new_sz);
 107
 108       if (new_ptr) {
 109         stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);
 110         stats->buf.buf = new_ptr;
 111         stats->buf_alloc_sz = new_sz;
 112       } else {
 113         fatal("Failed to realloc firstpass stats buffer.");
 114       }
 115     }
 116
 117     memcpy(stats->buf_ptr, pkt, len);
 118     stats->buf.sz += len;
 119     stats->buf_ptr += len;
 120   }
 121 }
 122
 123 vpx_fixed_buf_t stats_get(stats_io_t *stats) {
 124   return stats->buf;
 125 }