You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.1 KiB
107 lines
3.1 KiB
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef RASTERMILL_FRAMESQUENCE_WEBP_H
|
|
#define RASTERMILL_FRAMESQUENCE_WEBP_H
|
|
|
|
#include "config.h"
|
|
#include "webp/decode.h"
|
|
#include "webp/demux.h"
|
|
|
|
#include "Stream.h"
|
|
#include "Color.h"
|
|
#include "FrameSequence.h"
|
|
|
|
// Parser for a possibly-animated WebP bitstream.
|
|
class FrameSequence_webp : public FrameSequence {
|
|
public:
|
|
FrameSequence_webp(Stream* stream);
|
|
virtual ~FrameSequence_webp();
|
|
|
|
virtual int getWidth() const {
|
|
if (!mDemux) {
|
|
return 0;
|
|
}
|
|
return WebPDemuxGetI(mDemux, WEBP_FF_CANVAS_WIDTH);
|
|
}
|
|
|
|
virtual int getHeight() const {
|
|
if (!mDemux) {
|
|
return 0;
|
|
}
|
|
return WebPDemuxGetI(mDemux, WEBP_FF_CANVAS_HEIGHT);
|
|
}
|
|
|
|
virtual bool isOpaque() const {
|
|
return !(mFormatFlags & ALPHA_FLAG);
|
|
}
|
|
|
|
virtual int getFrameCount() const {
|
|
if (!mDemux) {
|
|
return 0;
|
|
}
|
|
return WebPDemuxGetI(mDemux, WEBP_FF_FRAME_COUNT);
|
|
}
|
|
|
|
virtual int getDefaultLoopCount() const {
|
|
return mLoopCount;
|
|
}
|
|
|
|
virtual jobject getRawByteBuffer() const {
|
|
return mRawByteBuffer;
|
|
}
|
|
|
|
virtual FrameSequenceState* createState() const;
|
|
|
|
WebPDemuxer* getDemuxer() const { return mDemux; }
|
|
|
|
bool isKeyFrame(size_t frameNr) const { return mIsKeyFrame[frameNr]; }
|
|
|
|
private:
|
|
void constructDependencyChain();
|
|
|
|
WebPData mData;
|
|
WebPDemuxer* mDemux;
|
|
int mLoopCount;
|
|
uint32_t mFormatFlags;
|
|
// mIsKeyFrame[i] is true if ith canvas can be constructed without decoding any prior frames.
|
|
bool* mIsKeyFrame;
|
|
jobject mRawByteBuffer = nullptr;
|
|
};
|
|
|
|
// Produces frames of a possibly-animated WebP file for display.
|
|
class FrameSequenceState_webp : public FrameSequenceState {
|
|
public:
|
|
FrameSequenceState_webp(const FrameSequence_webp& frameSequence);
|
|
virtual ~FrameSequenceState_webp();
|
|
|
|
// Returns frame's delay time in milliseconds.
|
|
virtual long drawFrame(int frameNr,
|
|
Color8888* outputPtr, int outputPixelStride, int previousFrameNr);
|
|
|
|
private:
|
|
void initializeFrame(const WebPIterator& currIter, Color8888* currBuffer, int currStride,
|
|
const WebPIterator& prevIter, const Color8888* prevBuffer, int prevStride);
|
|
bool decodeFrame(const WebPIterator& iter, Color8888* currBuffer, int currStride,
|
|
const WebPIterator& prevIter, const Color8888* prevBuffer, int prevStride);
|
|
|
|
const FrameSequence_webp& mFrameSequence;
|
|
WebPDecoderConfig mDecoderConfig;
|
|
Color8888* mPreservedBuffer;
|
|
};
|
|
|
|
#endif //RASTERMILL_FRAMESQUENCE_WEBP_H
|