зеркало из https://github.com/mozilla/gecko-dev.git
78 строки
2.1 KiB
C++
78 строки
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_image_decoders_nsAVIFDecoder_h
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#define mozilla_image_decoders_nsAVIFDecoder_h
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#include "Decoder.h"
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#include "mp4parse.h"
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#include "SurfacePipe.h"
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#include "aom/aom_decoder.h"
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#include "dav1d/dav1d.h"
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#include "mozilla/Telemetry.h"
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namespace mozilla {
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namespace image {
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class RasterImage;
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class nsAVIFDecoder final : public Decoder {
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public:
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virtual ~nsAVIFDecoder();
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DecoderType GetType() const override { return DecoderType::AVIF; }
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protected:
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LexerResult DoDecode(SourceBufferIterator& aIterator,
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IResumable* aOnResume) override;
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Maybe<Telemetry::HistogramID> SpeedHistogram() const override;
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private:
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friend class DecoderFactory;
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friend class AVIFDecoderInterface;
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// Decoders should only be instantiated via DecoderFactory.
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explicit nsAVIFDecoder(RasterImage* aImage);
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static intptr_t ReadSource(uint8_t* aDestBuf, uintptr_t aDestBufSize,
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void* aUserData);
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typedef int Dav1dResult;
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enum class NonAOMCodecError { NoFrame, SizeOverflow };
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typedef Variant<aom_codec_err_t, NonAOMCodecError> AOMResult;
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enum class NonDecoderResult {
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NeedMoreData,
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MetadataOk,
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NoPrimaryItem,
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SizeOverflow,
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OutOfMemory,
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PipeInitError,
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WriteBufferError,
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AlphaYSizeMismatch,
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AlphaYColorDepthMismatch,
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MetadataImageSizeMismatch,
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InvalidCICP,
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};
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using DecodeResult =
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Variant<Mp4parseStatus, NonDecoderResult, Dav1dResult, AOMResult>;
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DecodeResult Decode(SourceBufferIterator& aIterator, IResumable* aOnResume);
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static bool IsDecodeSuccess(const DecodeResult& aResult);
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void RecordDecodeResultTelemetry(const DecodeResult& aResult);
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Vector<uint8_t> mBufferedData;
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/// Pointer to the next place to read from mBufferedData
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const uint8_t* mReadCursor = nullptr;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_decoders_nsAVIFDecoder_h
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