| /* |
| * Copyright 2022 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkAvifCodec_DEFINED |
| #define SkAvifCodec_DEFINED |
| |
| #include "include/codec/SkCodec.h" |
| #include "include/codec/SkEncodedOrigin.h" |
| #include "include/core/SkData.h" |
| #include "include/core/SkEncodedImageFormat.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/private/SkEncodedInfo.h" |
| #include "src/codec/SkFrameHolder.h" |
| #include "src/codec/SkScalingCodec.h" |
| |
| #include <cstddef> |
| #include <memory> |
| #include <vector> |
| |
| class SkStream; |
| struct SkImageInfo; |
| struct avifDecoder; |
| struct AvifDecoderDeleter { |
| void operator()(avifDecoder* decoder) const; |
| }; |
| using AvifDecoder = std::unique_ptr<avifDecoder, AvifDecoderDeleter>; |
| |
| class SkAvifCodec : public SkScalingCodec { |
| public: |
| /* |
| * Returns true if an AVIF image is detected. Returns false otherwise. |
| */ |
| static bool IsAvif(const void*, size_t); |
| |
| /* |
| * Assumes IsAvif() was called and it returned true. |
| */ |
| static std::unique_ptr<SkCodec> MakeFromStream(std::unique_ptr<SkStream>, Result*); |
| |
| protected: |
| Result onGetPixels(const SkImageInfo& dstInfo, |
| void* dst, |
| size_t dstRowBytes, |
| const Options& options, |
| int* rowsDecoded) override; |
| |
| SkEncodedImageFormat onGetEncodedFormat() const override { return SkEncodedImageFormat::kAVIF; } |
| |
| int onGetFrameCount() override; |
| bool onGetFrameInfo(int, FrameInfo*) const override; |
| int onGetRepetitionCount() override; |
| const SkFrameHolder* getFrameHolder() const override { return &fFrameHolder; } |
| |
| private: |
| SkAvifCodec(SkEncodedInfo&&, |
| std::unique_ptr<SkStream>, |
| sk_sp<SkData>, |
| AvifDecoder, |
| SkEncodedOrigin, |
| bool); |
| |
| // fAvifDecoder has a pointer to this data. This should not be freed until |
| // the decode is completed. To ensure that, we declare this before |
| // fAvifDecoder. |
| sk_sp<SkData> fData; |
| |
| AvifDecoder fAvifDecoder; |
| bool fUseAnimation; |
| |
| class Frame : public SkFrame { |
| public: |
| Frame(int i, SkEncodedInfo::Alpha alpha) : INHERITED(i), fReportedAlpha(alpha) {} |
| |
| protected: |
| SkEncodedInfo::Alpha onReportedAlpha() const override { return fReportedAlpha; } |
| |
| private: |
| const SkEncodedInfo::Alpha fReportedAlpha; |
| |
| using INHERITED = SkFrame; |
| }; |
| |
| class FrameHolder : public SkFrameHolder { |
| public: |
| ~FrameHolder() override {} |
| void setScreenSize(int w, int h) { |
| fScreenWidth = w; |
| fScreenHeight = h; |
| } |
| Frame* appendNewFrame(bool hasAlpha); |
| const Frame* frame(int i) const; |
| int size() const { return static_cast<int>(fFrames.size()); } |
| void reserve(int size) { fFrames.reserve(size); } |
| |
| protected: |
| const SkFrame* onGetFrame(int i) const override; |
| |
| private: |
| std::vector<Frame> fFrames; |
| }; |
| |
| FrameHolder fFrameHolder; |
| using INHERITED = SkScalingCodec; |
| }; |
| |
| #endif // SkAvifCodec_DEFINED |