tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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warnings.c (3079B)

      1 /*
      2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
      3 *
      4 * This source code is subject to the terms of the BSD 2 Clause License and
      5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
      6 * was not distributed with this source code in the LICENSE file, you can
      7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
      8 * Media Patent License 1.0 was not distributed with this source code in the
      9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
     10 */
     11 
     12 #include "common/warnings.h"
     13 
     14 #include <assert.h>
     15 #include <stdio.h>
     16 #include <stdlib.h>
     17 #include <string.h>
     18 
     19 #include "aom/aom_encoder.h"
     20 #include "apps/aomenc.h"
     21 #include "common/tools_common.h"
     22 
     23 static const char quantizer_warning_string[] =
     24    "Bad quantizer values. Quantizer values should not be equal, and should "
     25    "differ by at least 8.";
     26 
     27 struct WarningListNode {
     28  const char *warning_string;
     29  struct WarningListNode *next_warning;
     30 };
     31 
     32 struct WarningList {
     33  struct WarningListNode *warning_node;
     34 };
     35 
     36 static void add_warning(const char *warning_string,
     37                        struct WarningList *warning_list) {
     38  struct WarningListNode **node = &warning_list->warning_node;
     39 
     40  struct WarningListNode *new_node = malloc(sizeof(*new_node));
     41  if (new_node == NULL) {
     42    fatal("Unable to allocate warning node.");
     43  }
     44 
     45  new_node->warning_string = warning_string;
     46  new_node->next_warning = NULL;
     47 
     48  while (*node != NULL) node = &(*node)->next_warning;
     49 
     50  *node = new_node;
     51 }
     52 
     53 static void free_warning_list(struct WarningList *warning_list) {
     54  while (warning_list->warning_node != NULL) {
     55    struct WarningListNode *const node = warning_list->warning_node;
     56    warning_list->warning_node = node->next_warning;
     57    free(node);
     58  }
     59 }
     60 
     61 static int continue_prompt(int num_warnings) {
     62  int c;
     63  fprintf(stderr,
     64          "%d encoder configuration warning(s). Continue? (y to continue) ",
     65          num_warnings);
     66  c = getchar();
     67  return c == 'y';
     68 }
     69 
     70 static void check_quantizer(int min_q, int max_q,
     71                            struct WarningList *warning_list) {
     72  const int lossless = min_q == 0 && max_q == 0;
     73  if (!lossless && (min_q == max_q || abs(max_q - min_q) < 8))
     74    add_warning(quantizer_warning_string, warning_list);
     75 }
     76 
     77 void check_encoder_config(int disable_prompt,
     78                          const struct AvxEncoderConfig *global_config,
     79                          const struct aom_codec_enc_cfg *stream_config) {
     80  int num_warnings = 0;
     81  struct WarningListNode *warning = NULL;
     82  struct WarningList warning_list = { 0 };
     83  (void)global_config;
     84  check_quantizer(stream_config->rc_min_quantizer,
     85                  stream_config->rc_max_quantizer, &warning_list);
     86  /* Count and print warnings. */
     87  for (warning = warning_list.warning_node; warning != NULL;
     88       warning = warning->next_warning, ++num_warnings) {
     89    aom_tools_warn("%s", warning->warning_string);
     90  }
     91 
     92  free_warning_list(&warning_list);
     93 
     94  if (num_warnings) {
     95    if (!disable_prompt && !continue_prompt(num_warnings)) exit(EXIT_FAILURE);
     96  }
     97 }