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
13class SkImage;
14
15class SkAnimCodecPlayer {
16public:
17    SkAnimCodecPlayer(std::unique_ptr<SkCodec> codec);
18    ~SkAnimCodecPlayer();
19
20    /**
21     *  Returns the current frame of the animation. This defaults to the first frame for
22     *  animated codecs (i.e. msec = 0). Calling this multiple times (without calling seek())
23     *  will always return the same image object (or null if there was an error).
24     */
25    sk_sp<SkImage> getFrame();
26
27    /**
28     *  Return the size of the image(s) that will be returned by getFrame().
29     */
30    SkISize dimensions() const;
31
32    /**
33     *  Returns the total duration of the animation in milliseconds. Returns 0 for a single-frame
34     *  image.
35     */
36    uint32_t duration() const { return fTotalDuration; }
37
38    /**
39     *  Finds the closest frame associated with the time code (in milliseconds) and sets that
40     *  to be the current frame (call getFrame() to retrieve that image).
41     *  Returns true iff this call to seek() changed the "current frame" for the animation.
42     *  Thus if seek() returns false, then getFrame() will return the same image as it did
43     *  before this call to seek().
44     */
45    bool seek(uint32_t msec);
46
47
48private:
49    std::unique_ptr<SkCodec>        fCodec;
50    SkImageInfo                     fImageInfo;
51    std::vector<SkCodec::FrameInfo> fFrameInfos;
52    std::vector<sk_sp<SkImage> >    fImages;
53    int                             fCurrIndex = 0;
54    uint32_t                        fTotalDuration;
55
56    sk_sp<SkImage> getFrameAt(int index);
57};
58
59#endif
60
61