1 /* 2 * Copyright 2018 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkAnimCodecPlayer_DEFINED 9 #define SkAnimCodecPlayer_DEFINED 10 11 #include "include/codec/SkCodec.h" 12 #include "include/core/SkImageInfo.h" 13 #include "include/core/SkRefCnt.h" 14 #include "include/core/SkSize.h" 15 16 #include <cstdint> 17 #include <memory> 18 #include <vector> 19 20 class SkImage; 21 22 class SkAnimCodecPlayer { 23 public: 24 SkAnimCodecPlayer(std::unique_ptr<SkCodec> codec); 25 ~SkAnimCodecPlayer(); 26 27 /** 28 * Returns the current frame of the animation. This defaults to the first frame for 29 * animated codecs (i.e. msec = 0). Calling this multiple times (without calling seek()) 30 * will always return the same image object (or null if there was an error). 31 */ 32 sk_sp<SkImage> getFrame(); 33 34 /** 35 * Return the size of the image(s) that will be returned by getFrame(). 36 */ 37 SkISize dimensions() const; 38 39 /** 40 * Returns the total duration of the animation in milliseconds. Returns 0 for a single-frame 41 * image. 42 */ duration()43 uint32_t duration() const { return fTotalDuration; } 44 45 /** 46 * Finds the closest frame associated with the time code (in milliseconds) and sets that 47 * to be the current frame (call getFrame() to retrieve that image). 48 * Returns true iff this call to seek() changed the "current frame" for the animation. 49 * Thus if seek() returns false, then getFrame() will return the same image as it did 50 * before this call to seek(). 51 */ 52 bool seek(uint32_t msec); 53 54 55 private: 56 std::unique_ptr<SkCodec> fCodec; 57 SkImageInfo fImageInfo; 58 std::vector<SkCodec::FrameInfo> fFrameInfos; 59 std::vector<sk_sp<SkImage> > fImages; 60 int fCurrIndex = 0; 61 uint32_t fTotalDuration; 62 63 sk_sp<SkImage> getFrameAt(int index); 64 }; 65 66 #endif 67 68