Merge pull request #51 from DanielSWolf/bugfix/#46-progress

Prevent incomplete progress reporting

rhubarb/src/audio/voiceActivityDetection.cpp

@@ -33,8 +33,8 @@ JoiningBoundedTimeline<void> webRtcDetectVoiceActivity(
 	if (error) throw runtime_error("Error setting WebRTC VAD aggressiveness.");
 
 	ProgressMerger progressMerger(progressSink);
-	ProgressSink& pass1ProgressSink = progressMerger.addSink(1.0);
-	ProgressSink& pass2ProgressSink = progressMerger.addSink(0.3);
+	ProgressSink& pass1ProgressSink = progressMerger.addSource("VAD pass 1", 1.0);
+	ProgressSink& pass2ProgressSink = progressMerger.addSource("VAD pass 2", 0.3);
 
 	// Detect activity
 	JoiningBoundedTimeline<void> activity(audioClip.getTruncatedRange());
@@ -100,7 +100,9 @@ JoiningBoundedTimeline<void> detectVoiceActivity(
 		);
 		audioSegments.push_back(segmentRange);
 	}
-	runParallel([&](const TimeRange& segmentRange, ProgressSink& segmentProgressSink) {
+	runParallel(
+		"VAD",
+		[&](const TimeRange& segmentRange, ProgressSink& segmentProgressSink) {
 			const unique_ptr<AudioClip> audioSegment = audioClip->clone() | segment(segmentRange);
 			JoiningBoundedTimeline<void> activitySegment =
 				webRtcDetectVoiceActivity(*audioSegment, segmentProgressSink);
@@ -110,7 +112,11 @@ JoiningBoundedTimeline<void> detectVoiceActivity(
 				activityRange.getTimeRange().shift(segmentRange.getStart());
 				activity.set(activityRange);
 			}
-	}, audioSegments, segmentCount, progressSink);
+		},
+		audioSegments,
+		segmentCount,
+		progressSink
+	);
 
 	// Fill small gaps in activity
 	const centiseconds maxGap(5);

rhubarb/src/recognition/PocketSphinxRecognizer.cpp

@@ -154,6 +154,8 @@ optional<Timeline<Phone>> getPhoneAlignment(
 	const vector<int16_t>& audioBuffer,
 	ps_decoder_t& decoder)
 {
+	if (wordIds.empty()) return boost::none;
+
 	// Create alignment list
 	lambda_unique_ptr<ps_alignment_t> alignment(
 		ps_alignment_init(decoder.d2p),
@@ -252,8 +254,10 @@ static Timeline<Phone> utteranceToPhones(
 	ProgressSink& utteranceProgressSink
 ) {
 	ProgressMerger utteranceProgressMerger(utteranceProgressSink);
-	ProgressSink& wordRecognitionProgressSink = utteranceProgressMerger.addSink(1.0);
-	ProgressSink& alignmentProgressSink = utteranceProgressMerger.addSink(0.5);
+	ProgressSink& wordRecognitionProgressSink =
+		utteranceProgressMerger.addSource("word recognition (PocketSphinx recognizer)", 1.0);
+	ProgressSink& alignmentProgressSink =
+		utteranceProgressMerger.addSource("alignment (PocketSphinx recognizer)", 0.5);
 
 	// Pad time range to give PocketSphinx some breathing room
 	TimeRange paddedTimeRange = utteranceTimeRange;
@@ -298,7 +302,6 @@ static Timeline<Phone> utteranceToPhones(
 		const string fixedWord = fixPronunciation(timedWord.getValue());
 		wordIds.push_back(getWordId(fixedWord, *decoder.dict));
 	}
-	if (wordIds.empty()) return {};
 
 	// Align the words' phones with speech
 #if BOOST_VERSION < 105600 // Support legacy syntax

rhubarb/src/recognition/pocketSphinxTools.cpp

@@ -91,8 +91,10 @@ BoundedTimeline<Phone> recognizePhones(
 	ProgressSink& progressSink
 ) {
 	ProgressMerger totalProgressMerger(progressSink);
-	ProgressSink& voiceActivationProgressSink = totalProgressMerger.addSink(1.0);
-	ProgressSink& dialogProgressSink = totalProgressMerger.addSink(15);
+	ProgressSink& voiceActivationProgressSink =
+		totalProgressMerger.addSource("VAD (PocketSphinx tools)", 1.0);
+	ProgressSink& dialogProgressSink =
+		totalProgressMerger.addSource("recognition (PocketSphinx tools)", 15.0);
 
 	// Make sure audio stream has no DC offset
 	const unique_ptr<AudioClip> audioClip = inputAudioClip.clone() | removeDcOffset();
@@ -151,6 +153,7 @@ BoundedTimeline<Phone> recognizePhones(
 		}
 		logging::debugFormat("Speech recognition using {} threads -- start", threadCount);
 		runParallel(
+			"speech recognition (PocketSphinx tools)",
 			processUtterance,
 			utterances,
 			threadCount,
@@ -159,7 +162,7 @@ BoundedTimeline<Phone> recognizePhones(
 		);
 		logging::debug("Speech recognition -- end");
 	} catch (...) {
-		std::throw_with_nested(runtime_error("Error performing speech recognition via PocketSphinx."));
+		std::throw_with_nested(runtime_error("Error performing speech recognition via PocketSphinx tools."));
 	}
 
 	return phones;

rhubarb/src/tools/parallel.h

@@ -82,6 +82,7 @@ void runParallel(
 
 template<typename TCollection>
 void runParallel(
+	const std::string& description,
 	std::function<void(typename TCollection::reference, ProgressSink&)> processElement,
 	TCollection& collection,
 	int maxThreadCount,
@@ -92,9 +93,15 @@ void runParallel(
 	// Create a collection of wrapper functions that take care of progress handling
 	ProgressMerger progressMerger(progressSink);
 	std::vector<std::function<void()>> functions;
+	int elementIndex = 0;
 	for (auto& element : collection) {
-		auto& elementProgressSink = progressMerger.addSink(getElementProgressWeight(element));
+		auto& elementProgressSink = progressMerger.addSource(
+			fmt::format("runParallel ({}) #{}", description, elementIndex),
+			getElementProgressWeight(element)
+		);
 		functions.push_back([&]() { processElement(element, elementProgressSink); });
+
+		++elementIndex;
 	}
 
 	// Run wrapper function

rhubarb/src/tools/progress.cpp

@@ -1,6 +1,7 @@
 #include "progress.h"
 
 #include <mutex>
+#include "logging/logging.h"
 
 using std::string;
 
@@ -16,17 +17,36 @@ ProgressMerger::ProgressMerger(ProgressSink& sink) :
 	sink(sink)
 {}
 
-ProgressSink& ProgressMerger::addSink(double weight) {
+ProgressMerger::~ProgressMerger() {
+	for (const auto& source : sources) {
+		if (source.progress < 1.0) {
+			logging::debugFormat(
+				"Progress merger source '{}' never reached 1.0, but stopped at {}.",
+				source.description,
+				source.progress
+			);
+		}
+	}
+}
+
+ProgressSink& ProgressMerger::addSource(const std::string& description, double weight) {
 	std::lock_guard<std::mutex> lock(mutex);
 
 	totalWeight += weight;
-	int sinkIndex = weightedValues.size();
-	weightedValues.push_back(0);
-	forwarders.emplace_back([weight, sinkIndex, this](double progress) {
-		weightedValues[sinkIndex] = progress * weight;
+
+	const int sourceIndex = sources.size();
+	sources.push_back({
+		description,
+		weight,
+		std::make_unique<ProgressForwarder>(
+			[sourceIndex, this](double progress) {
+				sources[sourceIndex].progress = progress;
 				report();
+			}
+		),
+		0.0
 	});
-	return forwarders.back();
+	return *sources[sourceIndex].forwarder;
 }
 
 void ProgressMerger::report() {
@@ -34,8 +54,8 @@ void ProgressMerger::report() {
 
 	if (totalWeight != 0) {
 		double weightedSum = 0;
-		for (double weightedValue : weightedValues) {
-			weightedSum += weightedValue;
+		for (const auto& source : sources) {
+			weightedSum += source.weight * source.progress;
 		}
 		const double progress = weightedSum / totalWeight;
 		sink.reportProgress(progress);

rhubarb/src/tools/progress.h

@@ -1,9 +1,10 @@
 #pragma once
 
-#include <list>
 #include <functional>
 #include <mutex>
 #include <vector>
+#include <memory>
+#include <string>
 
 class ProgressSink {
 public:
@@ -24,16 +25,25 @@ private:
 	std::function<void(double progress)> callback;
 };
 
+struct MergerSource {
+	std::string description;
+	double weight;
+	// Needs to be a pointer because we give away references to the forwarder
+	// itself which would become invalid if the MergerSource is moved.
+	std::unique_ptr<ProgressForwarder> forwarder;
+	double progress;
+};
+
 class ProgressMerger {
 public:
 	ProgressMerger(ProgressSink& sink);
-	ProgressSink& addSink(double weight);
+	~ProgressMerger();
+	ProgressSink& addSource(const std::string& description, double weight);
 private:
 	void report();
 
 	ProgressSink& sink;
 	std::mutex mutex;
 	double totalWeight = 0;
-	std::list<ProgressForwarder> forwarders;
-	std::vector<double> weightedValues;
+	std::vector<MergerSource> sources;
 };