blob: 2a8b721c9e9015b15d1b0b8c8d023ecbde278cef [file] [log] [blame]
* Copyright 2019 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkVideDecoder_DEFINED
#define SkVideDecoder_DEFINED
#include "include/core/SkImage.h"
extern "C" {
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
#include "libavutil/pixdesc.h"
#include "libswscale/swscale.h"
class SkStream;
class SkVideoDecoder {
SkVideoDecoder(GrRecordingContext* = nullptr);
void reset();
void setGrContext(GrRecordingContext* rContext) { fRecordingContext = rContext; }
bool loadStream(std::unique_ptr<SkStream>);
bool rewind();
SkISize dimensions() const;
double duration() const; // in seconds
// Returns each image in the video, or nullptr on eof
sk_sp<SkImage> nextImage(double* timeStamp = nullptr);
sk_sp<SkImage> convertFrame(const AVFrame*);
double computeTimeStamp(const AVFrame*) const;
struct ConvertedColorSpace {
AVColorPrimaries fPrimaries;
AVColorTransferCharacteristic fTransfer;
// fCS is the converted skia form of the above enums
sk_sp<SkColorSpace> fCS;
// Init with illegal values, so our first compare will fail, forcing us to compute
// the skcolorspace.
void update(AVColorPrimaries, AVColorTransferCharacteristic);
GrRecordingContext* fRecordingContext = nullptr; // not owned by us
std::unique_ptr<SkStream> fStream;
AVIOContext* fStreamCtx = nullptr;
AVFormatContext* fFormatCtx = nullptr;
AVCodecContext* fDecoderCtx = nullptr;
int fStreamIndex = -1; // fFormatCtx->stream[...]
AVPacket fPacket;
AVFrame* fFrame = nullptr;
ConvertedColorSpace fCSCache;
enum Mode {
Mode fMode = kDone_Mode;