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 (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
  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
  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
  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
 120 vpx_fixed_buf_t stats_get(stats_io_t *stats) {
 121   return stats->buf;
 122 }