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/*
* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "./warnings.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "vpx/vpx_encoder.h"
#include "./tools_common.h"
#include "./vpxenc.h"
static const char quantizer_warning_string[] =
"Bad quantizer values. Quantizer values should not be equal, and should "
"differ by at least 8.";
static const char lag_in_frames_with_realtime[] =
"Lag in frames is ignored when deadline is set to realtime for cbr mode.";
struct WarningListNode {
const char *warning_string;
struct WarningListNode *next_warning;
};
struct WarningList {
struct WarningListNode *warning_node;
};
static void add_warning(const char *warning_string,
struct WarningList *warning_list) {
struct WarningListNode **node = &warning_list->warning_node;
struct WarningListNode *new_node = malloc(sizeof(*new_node));
if (new_node == NULL) {
fatal("Unable to allocate warning node.");
}
new_node->warning_string = warning_string;
new_node->next_warning = NULL;
while (*node != NULL) node = &(*node)->next_warning;
*node = new_node;
}
static void free_warning_list(struct WarningList *warning_list) {
while (warning_list->warning_node != NULL) {
struct WarningListNode *const node = warning_list->warning_node;
warning_list->warning_node = node->next_warning;
free(node);
}
}
static int continue_prompt(int num_warnings) {
int c;
fprintf(stderr,
"%d encoder configuration warning(s). Continue? (y to continue) ",
num_warnings);
c = getchar();
return c == 'y';
}
static void check_quantizer(int min_q, int max_q,
struct WarningList *warning_list) {
const int lossless = min_q == 0 && max_q == 0;
if (!lossless && (min_q == max_q || abs(max_q - min_q) < 8))
add_warning(quantizer_warning_string, warning_list);
}
static void check_lag_in_frames_realtime_deadline(
int lag_in_frames, int deadline, int rc_end_usage,
struct WarningList *warning_list) {
if (deadline == VPX_DL_REALTIME && lag_in_frames != 0 && rc_end_usage == 1)
add_warning(lag_in_frames_with_realtime, warning_list);
}
void check_encoder_config(int disable_prompt,
const struct VpxEncoderConfig *global_config,
const struct vpx_codec_enc_cfg *stream_config) {
int num_warnings = 0;
struct WarningListNode *warning = NULL;
struct WarningList warning_list = { 0 };
check_quantizer(stream_config->rc_min_quantizer,
stream_config->rc_max_quantizer, &warning_list);
check_lag_in_frames_realtime_deadline(
stream_config->g_lag_in_frames, global_config->deadline,
stream_config->rc_end_usage, &warning_list);
/* Count and print warnings. */
for (warning = warning_list.warning_node; warning != NULL;
warning = warning->next_warning, ++num_warnings) {
warn(warning->warning_string);
}
free_warning_list(&warning_list);
if (num_warnings) {
if (!disable_prompt && !continue_prompt(num_warnings)) exit(EXIT_FAILURE);
}
}