81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
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/*
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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 <QImage>
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#include <QSize>
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#include <QByteArray>
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namespace Lottie {
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class AlignedStorage {
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public:
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void allocate(int packedBytesPerLine, int lines);
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int lines() const;
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int rawSize() const;
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// Gives a pointer to packedBytesPerLine * lines bytes of memory.
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void *raw();
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const void *raw() const;
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// Gives a stride value in the aligned storage (% 16 == 0).
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int bytesPerLine() const;
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// Gives a pointer to the aligned memory (% 16 == 0).
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void *aligned();
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const void *aligned() const;
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void copyRawToAligned();
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void copyAlignedToRaw();
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private:
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void reallocate();
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int _packedBytesPerLine = 0;
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int _lines = 0;
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QByteArray _raw;
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QByteArray _buffer;
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};
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class CacheState {
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public:
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enum class Encoder : uchar {
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YUV420A4_LZ4,
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};
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CacheState(const QByteArray &data, QSize box);
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[[nodiscard]] int frameRate() const;
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[[nodiscard]] int framesReady() const;
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[[nodiscard]] int framesCount() const;
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[[nodiscard]] QImage takeFirstFrame();
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private:
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[[nodiscard]] bool readHeader(QSize box);
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void prepareBuffers();
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[[nodiscard]] bool readCompressedDelta(int offset);
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[[nodiscard]] int uncompressedDeltaSize() const;
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QByteArray _data;
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QSize _size;
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QSize _original;
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AlignedStorage _uncompressed;
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AlignedStorage _previous;
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QImage _firstFrame;
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int _frameRate = 0;
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int _framesCount = 0;
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int _framesReady = 0;
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int _offset = 0;
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Encoder _encoder = Encoder::YUV420A4_LZ4;
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};
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} // namespace Lottie
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