71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include <QtCore/QBuffer>
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namespace Core {
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class FileLocation;
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} // namespace Core
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namespace Media {
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namespace Clip {
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namespace internal {
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class ReaderImplementation {
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public:
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ReaderImplementation(Core::FileLocation *location, QByteArray *data)
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: _location(location)
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, _data(data) {
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}
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enum class Mode {
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Silent,
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Inspecting, // Not playing video, but reading data.
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};
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enum class ReadResult {
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Success,
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Error,
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EndOfFile,
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};
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// Read frames till current frame will have presentation time > frameMs, systemMs = crl::now().
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virtual ReadResult readFramesTill(crl::time frameMs, crl::time systemMs) = 0;
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// Get current frame real and presentation time.
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virtual crl::time frameRealTime() const = 0;
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virtual crl::time framePresentationTime() const = 0;
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// Render current frame to an image with specific size.
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virtual bool renderFrame(QImage &to, bool &hasAlpha, const QSize &size) = 0;
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virtual crl::time durationMs() const = 0;
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virtual bool start(Mode mode, crl::time &positionMs) = 0;
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virtual ~ReaderImplementation() {
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}
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int64 dataSize() const {
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return _dataSize;
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}
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protected:
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Core::FileLocation *_location = nullptr;
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QByteArray *_data = nullptr;
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QFile _file;
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QBuffer _buffer;
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QIODevice *_device = nullptr;
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int64 _dataSize = 0;
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void initDevice();
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};
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} // namespace internal
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} // namespace Clip
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} // namespace Media
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