tdesktop/Telegram/SourceFiles/media/media_clip_implementation.h

69 lines
1.5 KiB
C++

/*
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
class FileLocation;
namespace Media {
namespace Clip {
namespace internal {
class ReaderImplementation {
public:
ReaderImplementation(FileLocation *location, QByteArray *data)
: _location(location)
, _data(data) {
}
enum class Mode {
Silent,
Normal,
Inspecting, // Not playing video, but reading data.
};
enum class ReadResult {
Success,
Error,
EndOfFile,
};
// Read frames till current frame will have presentation time > frameMs, systemMs = getms().
virtual ReadResult readFramesTill(TimeMs frameMs, TimeMs systemMs) = 0;
// Get current frame real and presentation time.
virtual TimeMs frameRealTime() const = 0;
virtual TimeMs framePresentationTime() const = 0;
// Render current frame to an image with specific size.
virtual bool renderFrame(QImage &to, bool &hasAlpha, const QSize &size) = 0;
virtual TimeMs durationMs() const = 0;
virtual bool hasAudio() const = 0;
virtual bool start(Mode mode, TimeMs &positionMs) = 0;
virtual ~ReaderImplementation() {
}
int64 dataSize() const {
return _dataSize;
}
protected:
FileLocation *_location;
QByteArray *_data;
QFile _file;
QBuffer _buffer;
QIODevice *_device = nullptr;
int64 _dataSize = 0;
void initDevice();
};
} // namespace internal
} // namespace Clip
} // namespace Media