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     size_t nbytes;
  30
  31     stats->file = fopen(fpf, "rb");
  32
  33     if (stats->file == NULL)
  34       fatal("First-pass stats file does not exist!");
  35
  36     if (fseek(stats->file, 0, SEEK_END))
  37       fatal("First-pass stats file must be seekable!");
  38
  39     stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);
  40     rewind(stats->file);
  41
  42     stats->buf.buf = malloc(stats->buf_alloc_sz);
  43
  44     if (!stats->buf.buf)
  45       fatal("Failed to allocate first-pass stats buffer (%lu bytes)",
  46             (unsigned int)stats->buf_alloc_sz);
  47
  48     nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
  49     res = (nbytes == stats->buf.sz);
  50   }
  51
  52   return res;
  53 }
  54
  55 int stats_open_mem(stats_io_t *stats, int pass) {
  56   int res;
  57   stats->pass = pass;
  58
  59   if (!pass) {
  60     stats->buf.sz = 0;
  61     stats->buf_alloc_sz = 64 * 1024;
  62     stats->buf.buf = malloc(stats->buf_alloc_sz);
  63   }
  64
  65   stats->buf_ptr = stats->buf.buf;
  66   res = (stats->buf.buf != NULL);
  67   return res;
  68 }
  69
  70 void stats_close(stats_io_t *stats, int last_pass) {
  71   if (stats->file) {
  72     if (stats->pass == last_pass) {
  73       free(stats->buf.buf);
  74     }
  75
  76     fclose(stats->file);
  77     stats->file = NULL;
  78   } else {
  79     if (stats->pass == last_pass)
  80       free(stats->buf.buf);
  81   }
  82 }
  83
  84 void stats_write(stats_io_t *stats, const void *pkt, size_t len) {
  85   if (stats->file) {
  86     (void) fwrite(pkt, 1, len, stats->file);
  87   } else {
  88     if (stats->buf.sz + len > stats->buf_alloc_sz) {
  89       size_t  new_sz = stats->buf_alloc_sz + 64 * 1024;
  90       char   *new_ptr = realloc(stats->buf.buf, new_sz);
  91
  92       if (new_ptr) {
  93         stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);
  94         stats->buf.buf = new_ptr;
  95         stats->buf_alloc_sz = new_sz;
  96       } else {
  97         fatal("Failed to realloc firstpass stats buffer.");
  98       }
  99     }
 100
 101     memcpy(stats->buf_ptr, pkt, len);
 102     stats->buf.sz += len;
 103     stats->buf_ptr += len;
 104   }
 105 }
 106
 107 vpx_fixed_buf_t stats_get(stats_io_t *stats) {
 108   return stats->buf;
 109 }