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Diffstat (limited to 'warnings.c')
-rw-r--r-- | warnings.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/warnings.c b/warnings.c new file mode 100644 index 000000000..3e6e70253 --- /dev/null +++ b/warnings.c @@ -0,0 +1,109 @@ +/* + * 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("%s", warning->warning_string); + } + + free_warning_list(&warning_list); + + if (num_warnings) { + if (!disable_prompt && !continue_prompt(num_warnings)) exit(EXIT_FAILURE); + } +} |