1 /* 2 * Copyright (C) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef GIF_DECODER_H 17 #define GIF_DECODER_H 18 19 #include <cstdint> 20 #include <map> 21 #include <string> 22 #include "abs_image_decoder.h" 23 #include "gif_lib.h" 24 #include "hilog/log.h" 25 #include "log_tags.h" 26 #include "media_errors.h" 27 #include "nocopyable.h" 28 #include "plugin_class_base.h" 29 #ifndef _WIN32 30 #include "securec.h" 31 #else 32 #include "memory.h" 33 #endif 34 35 namespace OHOS { 36 namespace ImagePlugin { 37 static constexpr uint8_t PIXEL_FORMAT_BYTE_SIZE = 4; 38 39 class GifDecoder : public AbsImageDecoder, public OHOS::MultimediaPlugin::PluginClassBase { 40 public: 41 GifDecoder(); 42 ~GifDecoder() override; 43 void SetSource(InputDataStream &sourceStream) override; 44 void Reset() override; 45 uint32_t SetDecodeOptions(uint32_t index, const PixelDecodeOptions &opts, PlImageInfo &info) override; 46 uint32_t Decode(uint32_t index, DecodeContext &context) override; 47 uint32_t PromoteIncrementalDecode(uint32_t index, ProgDecodeContext &context) override; 48 uint32_t GetTopLevelImageNum(uint32_t &num) override; 49 uint32_t GetImageSize(uint32_t index, PlSize &size) override; 50 uint32_t GetImagePropertyInt(uint32_t index, const std::string &key, int32_t &value) override; 51 uint32_t GetImagePropertyString(uint32_t index, const std::string &key, std::string &value) override; 52 #ifdef IMAGE_COLORSPACE_FLAG IsSupportICCProfile()53 bool IsSupportICCProfile() override 54 { 55 return false; 56 } 57 #endif 58 59 private: 60 static int32_t InputStreamReader(GifFileType *gif, GifByteType *bytes, int32_t size); 61 DISALLOW_COPY_AND_MOVE(GifDecoder); 62 uint32_t CheckIndex(uint32_t index); 63 uint32_t OverlapFrame(uint32_t startIndex, uint32_t endIndex); 64 uint32_t RedirectOutputBuffer(DecodeContext &context); 65 void GetTransparentAndDisposal(uint32_t index, int32_t &transparentColor, int32_t &disposalMode); 66 GraphicsControlBlock GetGraphicsControlBlock(uint32_t index); 67 uint32_t PaddingBgColor(const SavedImage *savedImage); 68 bool IsFramePreviousCoveredCurrent(const SavedImage *preSavedImage, const SavedImage *curSavedImage); 69 uint32_t PaddingData(const SavedImage *savedImage, int32_t transparentColor); 70 void CopyLine(const GifByteType *srcFrame, uint32_t *dstFrame, int32_t frameWidth, int32_t transparentColor, 71 const ColorMapObject *colorMap); 72 uint32_t GetPixelColor(uint32_t red, uint32_t green, uint32_t blue, uint32_t alpha); 73 void ParseBgColor(); 74 uint32_t UpdateGifFileType(int32_t updateFrameIndex); 75 uint32_t CreateGifFileTypeIfNotExist(); 76 uint32_t ParseFrameDetail(); 77 uint32_t SetSavedImageRasterBits(SavedImage *saveImagePtr, int32_t frameIndex, uint64_t imageSize, 78 int32_t imageWidth, int32_t imageHeight); 79 uint32_t ParseFrameExtension(); 80 uint32_t AllocateLocalPixelMapBuffer(); 81 void FreeLocalPixelMapBuffer(); 82 uint32_t DisposeBackground(uint32_t frameIndex, const SavedImage *curSavedImage); 83 uint32_t GetImageDelayTime(uint32_t index, int32_t &value); 84 uint32_t GetImageLoopCount(uint32_t index, int32_t &value); 85 86 InputDataStream *inputStreamPtr_ = nullptr; 87 GifFileType *gifPtr_ = nullptr; 88 uint32_t *localPixelMapBuffer_ = nullptr; 89 uint32_t bgColor_ = 0; 90 int32_t lastPixelMapIndex_ = -1; 91 bool isLoadAllFrame_ = false; 92 int32_t savedFrameIndex_ = -1; 93 }; 94 } // namespace ImagePlugin 95 } // namespace OHOS 96 97 #endif // GIF_DECODER_H 98