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Telegram/SourceFiles/media/audio/media_child_ffmpeg_loader.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 "media/audio/media_audio_ffmpeg_loader.h"
+#include "media/streaming/media_streaming_utility.h"
+
+namespace Media {
+
+struct ExternalSoundData {
+	FFmpeg::CodecPointer codec;
+	FFmpeg::FramePointer frame;
+	crl::time duration = 0;
+	float64 speed = 1.; // 0.5 <= speed <= 2.
+};
+
+struct ExternalSoundPart {
+	AudioMsgId audio;
+	gsl::span<FFmpeg::Packet> packets;
+};
+
+class ChildFFMpegLoader : public AbstractAudioFFMpegLoader {
+public:
+	ChildFFMpegLoader(std::unique_ptr<ExternalSoundData> &&data);
+
+	bool open(crl::time positionMs, float64 speed = 1.) override;
+
+	bool check(const Core::FileLocation &file, const QByteArray &data) override {
+		return true;
+	}
+
+	ReadResult readMore() override;
+	void enqueuePackets(std::deque<FFmpeg::Packet> &&packets) override;
+	void setForceToBuffer(bool force) override;
+	bool forceToBuffer() const override;
+
+	bool eofReached() const {
+		return _eofReached;
+	}
+
+	~ChildFFMpegLoader();
+
+private:
+	// Streaming player reads first frame by itself and provides it together
+	// with the codec context. So we first read data from this frame and
+	// only after that we try to read next packets.
+	ReadResult readFromInitialFrame();
+
+	std::unique_ptr<ExternalSoundData> _parentData;
+	std::deque<FFmpeg::Packet> _queue;
+	bool _forceToBuffer = false;
+	bool _eofReached = false;
+	bool _readTillEnd = false;
+
+};
+
+} // namespace Media