dragonpilot - 基於 openpilot 的開源駕駛輔助系統
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#pragma once
#include <memory>
#include <string>
#include <vector>
#include "selfdrive/ui/replay/filereader.h"
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <libavutil/imgutils.h>
}
struct AVFrameDeleter {
void operator()(AVFrame* frame) const { av_frame_free(&frame); }
};
class FrameReader : protected FileReader {
public:
FrameReader(bool local_cache = false, int chunk_size = -1, int retries = 0);
~FrameReader();
bool load(const std::string &url, bool no_cuda = false, std::atomic<bool> *abort = nullptr);
bool get(int idx, uint8_t *rgb, uint8_t *yuv);
int getRGBSize() const { return width * height * 3; }
int getYUVSize() const { return width * height * 3 / 2; }
size_t getFrameCount() const { return frames_.size(); }
bool valid() const { return valid_; }
int width = 0, height = 0;
private:
bool initHardwareDecoder(AVHWDeviceType hw_device_type);
bool decode(int idx, uint8_t *rgb, uint8_t *yuv);
AVFrame * decodeFrame(AVPacket *pkt);
bool copyBuffers(AVFrame *f, uint8_t *rgb, uint8_t *yuv);
struct Frame {
AVPacket pkt = {};
int decoded = false;
bool failed = false;
};
std::vector<Frame> frames_;
AVPixelFormat sws_src_format = AV_PIX_FMT_YUV420P;
SwsContext *rgb_sws_ctx_ = nullptr, *yuv_sws_ctx_ = nullptr;
std::unique_ptr<AVFrame, AVFrameDeleter>av_frame_, sws_frame, hw_frame;
AVFormatContext *input_ctx = nullptr;
AVCodecContext *decoder_ctx = nullptr;
int key_frames_count_ = 0;
bool valid_ = false;
AVIOContext *avio_ctx_ = nullptr;
AVPixelFormat hw_pix_fmt = AV_PIX_FMT_NONE;
AVBufferRef *hw_device_ctx = nullptr;
};