static void write_to_console(string text, USER_CONFIG user_config)
{
if (false == user_config.suppress_output_enabled)
{
Console.Write(text);
}
}
static void write_to_console_or_file(string text, USER_CONFIG user_config)
{
if (false == user_config.suppress_output_enabled)
{
Console.Write(text);
}
if (true == user_config.output_file_enabled)
{
File.AppendAllText(user_config.output_file, text);
}
}
static void initialize(USER_CONFIG user_config)
{
if (true == user_config.output_file_enabled && true == File.Exists(user_config.output_file))
{
File.Delete(user_config.output_file);
}
if (false == user_config.srt_enabled)
{
write_to_console_or_file(String.Format("WEBVTT{0}{0}", Environment.NewLine), user_config);
}
}
static SpeechConfig user_config_to_speech_config(USER_CONFIG user_config)
{
Uri endpoint = new Uri(region_to_endpoint(user_config.region));
SpeechConfig speech_config = SpeechConfig.FromEndpoint(endpoint, user_config.subscription_key);
/* Note: Dictation mode is only supported for continuous recognition.
* See:
* https://docs.microsoft.com/azure/cognitive-services/speech-service/get-started-speech-to-text?tabs=windowsinstall&pivots=programming-language-cpp#dictation-mode
*/
if (true == user_config.dictation_enabled)
{
speech_config.EnableDictation();
}
if (true == user_config.language_id_enabled)
{
/* Notes:
* - Continuous language identification is supported only in C#, C++, and Python.
* See:
* https://docs.microsoft.com/azure/cognitive-services/Speech-Service/language-identification?tabs=once&pivots=programming-language-cpp#at-start-and-continuous-language-identification
*
* - Valid values are "Latency" and "Accuracy" (for standalone languageId).
* See:
* https://docs.microsoft.com/azure/cognitive-services/Speech-Service/language-identification?tabs=once&pivots=programming-language-cpp#accuracy-and-latency-prioritization
*/
if (true == user_config.prioritize_accuracy_enabled)
{
speech_config.SetProperty(PropertyId.SpeechServiceConnection_ContinuousLanguageIdPriority, "Accuracy");
}
else
{
speech_config.SetProperty(PropertyId.SpeechServiceConnection_ContinuousLanguageIdPriority, "Latency");
}
}
if (true == user_config.profanity_filter_enabled)
{
speech_config.SetProfanity(ProfanityOption.Removed);
}
if (true == user_config.stable_partial_result_threshold_enabled)
{
speech_config.SetProperty("StablePartialResultThreshold", user_config.stable_partial_result_threshold);
}
if (true == user_config.true_text_enabled)
{
speech_config.SetProperty("SpeechServiceResponse_PostProcessingOption", "TrueText");
}
return(speech_config);
}
static async Task <string?> recognize_continuous(SpeechRecognizer speech_recognizer, USER_CONFIG user_config)
{
var recognition_end = new TaskCompletionSource <string?>();
int sequence_number = 0;
speech_recognizer.Recognized += (object?sender, SpeechRecognitionEventArgs e) =>
{
if (ResultReason.RecognizedSpeech == e.Result.Reason && e.Result.Text.Length > 0)
{
string?language = null;
if (true == user_config.language_id_enabled)
{
var language_id_result = AutoDetectSourceLanguageResult.FromResult(e.Result);
language = language_id_result.Language;
}
sequence_number++;
var start_time = new DateTime(e.Result.OffsetInTicks);
var end_time = start_time.Add(e.Result.Duration);
string caption = caption_time_to_caption(user_config.srt_enabled, sequence_number, start_time, end_time, e.Result.Text, language);
write_to_console_or_file(caption, user_config);
}
else if (ResultReason.NoMatch == e.Result.Reason)
{
write_to_console(String.Format("NOMATCH: Speech could not be recognized.{0}", Environment.NewLine), user_config);
}
};
speech_recognizer.Canceled += (object?sender, SpeechRecognitionCanceledEventArgs e) =>
{
if (CancellationReason.EndOfStream == e.Reason)
{
write_to_console(String.Format("End of stream reached.{0}", Environment.NewLine), user_config);
recognition_end.TrySetResult(null); // Notify to stop recognition.
}
else if (CancellationReason.CancelledByUser == e.Reason)
{
write_to_console(String.Format("User canceled request.{0}", Environment.NewLine), user_config);
recognition_end.TrySetResult(null); // Notify to stop recognition.
}
else if (CancellationReason.Error == e.Reason)
{
var error = String.Format("Encountered error.{0}Error code: {1}{0}Error details: {2}{0}", Environment.NewLine, (int)e.ErrorCode, e.ErrorDetails);
recognition_end.TrySetResult(error); // Notify to stop recognition.
}
else
{
var error = String.Format("Request was cancelled for an unrecognized reason: {0}.{1}", (int)e.Reason, Environment.NewLine);
recognition_end.TrySetResult(error); // Notify to stop recognition.
}
};
speech_recognizer.SessionStopped += (object?sender, SessionEventArgs e) =>
{
write_to_console(String.Format("Session stopped.{0}", Environment.NewLine), user_config);
recognition_end.TrySetResult(null); // Notify to stop recognition.
};
// Starts continuous recognition. Uses StopContinuousRecognitionAsync() to stop recognition.
await speech_recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);
// Waits for recognition end.
Task.WaitAll(new[] { recognition_end.Task });
// Stops recognition.
await speech_recognizer.StopContinuousRecognitionAsync().ConfigureAwait(false);
return(recognition_end.Task.Result);
}
static SpeechRecognizer user_config_to_speech_recognizer(SpeechConfig speech_config, AudioConfig audio_config, USER_CONFIG user_config)
{
SpeechRecognizer speech_recognizer;
if (true == user_config.language_id_enabled)
{
/* Note: Continuous language identification is supported only in C#, C++, and Python.
* See:
* https://docs.microsoft.com/azure/cognitive-services/speech-service/how-to-automatic-language-detection?pivots=programming-language-cpp#language-identification-with-speech-to-text
*/
AutoDetectSourceLanguageConfig detect_language_config = AutoDetectSourceLanguageConfig.FromLanguages(user_config.language_id_languages);
speech_recognizer = new SpeechRecognizer(speech_config, detect_language_config, audio_config);
}
else
{
speech_recognizer = new SpeechRecognizer(speech_config, audio_config);
}
if (true == user_config.phrase_list_enabled)
{
PhraseListGrammar grammar = PhraseListGrammar.FromRecognizer(speech_recognizer);
grammar.AddPhrase(user_config.phrase_list);
}
return(speech_recognizer);
}
static USER_CONFIG args_to_user_config(string[] args)
{
bool prioritize_accuracy_enabled = false;
bool dictation_enabled = false;
bool profanity_filter_enabled = false;
bool language_id_enabled = false;
string[] language_id_languages = {};
bool output_file_enabled = false;
string output_file = "";
bool phrase_list_enabled = false;
string phrase_list = "";
bool suppress_output_enabled = false;
bool stable_partial_result_threshold_enabled = false;
string stable_partial_result_threshold = "";
bool srt_enabled = false;
bool true_text_enabled = false;
string subscription_key = "";
string region = "";
// Verify argc >= 3 (caption.exe, subscription_key, region)
if (args.Length < 3)
{
throw new TOO_FEW_ARGUMENTS();
}
subscription_key = args[args.Length - 2];
region = args[args.Length - 1];
prioritize_accuracy_enabled = cmd_option_exists(args, "-a");
dictation_enabled = cmd_option_exists(args, "-d");
profanity_filter_enabled = cmd_option_exists(args, "-f");
if (get_cmd_option(args, "-l") is string language_id_languages_result)
{
language_id_enabled = true;
language_id_languages = language_id_languages_result.Split(',');
}
if (get_cmd_option(args, "-o") is string output_file_result)
{
output_file_enabled = true;
output_file = output_file_result;
}
if (get_cmd_option(args, "-p") is string phrase_list_result)
{
phrase_list_enabled = true;
phrase_list = phrase_list_result;
}
suppress_output_enabled = cmd_option_exists(args, "-q");
if (get_cmd_option(args, "-r") is string stable_partial_result_threshold_result)
{
stable_partial_result_threshold_enabled = true;
stable_partial_result_threshold = stable_partial_result_threshold_result;
}
srt_enabled = cmd_option_exists(args, "-s");
true_text_enabled = cmd_option_exists(args, "-t");
USER_CONFIG user_config = new USER_CONFIG(
prioritize_accuracy_enabled,
dictation_enabled,
profanity_filter_enabled,
language_id_enabled,
language_id_languages,
output_file_enabled,
output_file,
phrase_list_enabled,
phrase_list,
suppress_output_enabled,
stable_partial_result_threshold_enabled,
stable_partial_result_threshold,
srt_enabled,
true_text_enabled,
subscription_key,
region
);
return(user_config);
}