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Telegram/SourceFiles/media/audio/media_audio_capture.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include <QtCore/QThread>
+#include <QtCore/QTimer>
+
+namespace Media {
+namespace Capture {
+
+struct Update {
+	int samples = 0;
+	ushort level = 0;
+
+	bool finished = false;
+};
+
+enum class Error : uchar {
+	Other,
+	AudioInit,
+	VideoInit,
+	AudioTimeout,
+	VideoTimeout,
+	Encoding,
+};
+
+struct Chunk {
+	crl::time finished = 0;
+	QByteArray samples;
+	int frequency = 0;
+};
+
+struct Result;
+
+void Start();
+void Finish();
+
+class Instance final : public QObject {
+public:
+	Instance();
+	~Instance();
+
+	void check();
+	[[nodiscard]] bool available() const {
+		return _available;
+	}
+
+	[[nodiscard]] rpl::producer<Update, Error> updated() const {
+		return _updates.events();
+	}
+
+	[[nodiscard]] bool started() const {
+		return _started.current();
+	}
+	[[nodiscard]] rpl::producer<bool> startedChanges() const {
+		return _started.changes();
+	}
+
+	void start(Fn<void(Chunk)> externalProcessing = nullptr);
+	void stop(Fn<void(Result&&)> callback = nullptr);
+	void pause(bool value, Fn<void(Result&&)> callback = nullptr);
+
+private:
+	class Inner;
+	friend class Inner;
+
+	bool _available = false;
+	rpl::variable<bool> _started = false;
+	rpl::event_stream<Update, Error> _updates;
+	QThread _thread;
+	std::unique_ptr<Inner> _inner;
+
+};
+
+[[nodiscard]] Instance *instance();
+
+} // namespace Capture
+} // namespace Media
+