pixel_stream.h

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#pragma once
 
#include "crgb.h"
#include "fl/bytestream.h"
#include "fl/file_system.h"
#include "fl/namespace.h"
#include "fl/memory.h"
#include "fx/frame.h"
#include "fl/int.h"
namespace fl {
FASTLED_SMART_PTR(FileHandle);
FASTLED_SMART_PTR(ByteStream);
} // namespace fl
 
namespace fl {
 
FASTLED_SMART_PTR(PixelStream);
 
// PixelStream takes either a file handle or a byte stream
// and reads frames from it in order to serve data to the
// video system.
class PixelStream {
  public:
    enum Type {
        kStreaming,
        kFile,
    };
 
    explicit PixelStream(int bytes_per_frame);
 
    bool begin(fl::FileHandlePtr h);
    bool beginStream(fl::ByteStreamPtr s);
    void close();
    int32_t bytesPerFrame();
    bool readPixel(CRGB *dst); // Convenience function to read a pixel
    size_t readBytes(uint8_t *dst, size_t len);
 
    bool readFrame(Frame *frame);
    bool readFrameAt(fl::u32 frameNumber, Frame *frame);
    bool hasFrame(fl::u32 frameNumber);
    int32_t framesRemaining() const; // -1 if this is a stream.
    int32_t framesDisplayed() const;
    bool available() const;
    bool atEnd() const;
 
    int32_t bytesRemaining() const;
    int32_t bytesRemainingInFrame() const;
    bool
    rewind(); // Returns false on failure, which can happen for streaming mode.
    Type getType()
        const; // Returns the type of the video stream (kStreaming or kFile)
 
  private:
    fl::i32 mbytesPerFrame;
    fl::FileHandlePtr mFileHandle;
    fl::ByteStreamPtr mByteStream;
    bool mUsingByteStream;
 
  public:
    virtual ~PixelStream();
};
 
} // namespace fl