/*

 * Copyright 2018 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkAnimCodecPlayer_DEFINED

#define SkAnimCodecPlayer_DEFINED

#include "include/codec/SkCodec.h"

#include "include/core/SkImageInfo.h"

#include "include/core/SkRefCnt.h"

#include "include/core/SkSize.h"

#include <cstdint>

#include <memory>

#include <vector>

class SkImage;

class SkAnimCodecPlayer {

public:

    SkAnimCodecPlayer(std::unique_ptr<SkCodec> codec);

    ~SkAnimCodecPlayer();

    /**

     *  Returns the current frame of the animation. This defaults to the first frame for

     *  animated codecs (i.e. msec = 0). Calling this multiple times (without calling seek())

     *  will always return the same image object (or null if there was an error).

     */

    sk_sp<SkImage> getFrame();

    /**

     *  Return the size of the image(s) that will be returned by getFrame().

     */

    SkISize dimensions() const;

    /**

     *  Returns the total duration of the animation in milliseconds. Returns 0 for a single-frame

     *  image.

     */

    uint32_t duration() const { return fTotalDuration; }

    /**

     *  Finds the closest frame associated with the time code (in milliseconds) and sets that

     *  to be the current frame (call getFrame() to retrieve that image).

     *  Returns true iff this call to seek() changed the "current frame" for the animation.

     *  Thus if seek() returns false, then getFrame() will return the same image as it did

     *  before this call to seek().

     */

    bool seek(uint32_t msec);

private:

    std::unique_ptr<SkCodec>        fCodec;

    SkImageInfo                     fImageInfo;

    std::vector<SkCodec::FrameInfo> fFrameInfos;

    std::vector<sk_sp<SkImage> >    fImages;

    int                             fCurrIndex = 0;

    uint32_t                        fTotalDuration;

    sk_sp<SkImage> getFrameAt(int index);

};

#endif