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86 lines
2.4 KiB
86 lines
2.4 KiB
/*
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* Copyright 2019 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkVideEncoder_DEFINED
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#define SkVideEncoder_DEFINED
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#include "include/core/SkImage.h"
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#include "include/core/SkStream.h"
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extern "C" {
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#include "libavcodec/avcodec.h"
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#include "libavformat/avformat.h"
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#include "libavformat/avio.h"
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#include "libavutil/pixdesc.h"
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}
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// private to the impl
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class SkRandomAccessWStream;
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struct SwsContext;
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class SkVideoEncoder {
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public:
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SkVideoEncoder();
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~SkVideoEncoder();
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/**
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* Begins a new recording. Balance this (after adding all of your frames) with a call
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* to endRecording().
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*/
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bool beginRecording(SkISize, int fps);
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/**
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* If you have your own pixmap, call addFrame(). Note this may fail if it uses an unsupported
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* ColorType (requires kN32_SkColorType) or AlphaType, or the dimensions don't match those set
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* in beginRecording.
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*/
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bool addFrame(const SkPixmap&);
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/**
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* As an alternative to calling addFrame(), you can call beginFrame/endFrame, and the encoder
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* will manage allocating a surface/canvas for you.
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*
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* SkCanvas* canvas = encoder.beginFrame();
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* // your drawing code here, drawing into canvas
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* encoder.endFrame();
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*/
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SkCanvas* beginFrame();
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bool endFrame();
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/**
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* Call this after having added all of your frames. After calling this, no more frames can
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* be added to this recording. To record a new video, call beginRecording().
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*/
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sk_sp<SkData> endRecording();
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private:
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void reset();
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bool init(int fps);
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bool sendFrame(AVFrame*); // frame can be null
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double computeTimeStamp(const AVFrame*) const;
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SwsContext* fSWScaleCtx = nullptr;
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AVIOContext* fStreamCtx = nullptr;
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AVFormatContext* fFormatCtx = nullptr;
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AVCodecContext* fEncoderCtx = nullptr;
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AVStream* fStream = nullptr; // we do not free this
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AVFrame* fFrame = nullptr;
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AVPacket* fPacket = nullptr;
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SkImageInfo fInfo; // only defined between beginRecording() and endRecording()
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std::unique_ptr<SkRandomAccessWStream> fWStream;
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int64_t fCurrentPTS, fDeltaPTS;
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// Lazily allocated, iff the client has called beginFrame() for a given recording session.
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sk_sp<SkSurface> fSurface;
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};
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#endif
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