readFrameAt()

bool fl::PixelStream::readFrameAt	(	uint32_t	frameNumber,
		Frame *	frame )

Definition at line 99 of file pixel_stream.cpp.

                                                                {
    // DBG("read frame at " << frameNumber);
    if (mUsingByteStream) {
        // ByteStream doesn't support seeking
        FASTLED_DBG("ByteStream doesn't support seeking");
        return false;
    } else {
        // DBG("mbytesPerFrame: " << mbytesPerFrame);
        mFileHandle->seek(frameNumber * mbytesPerFrame);
        if (mFileHandle->bytesLeft() == 0) {
            return false;
        }
        size_t read =
            mFileHandle->readCRGB(frame->rgb(), mbytesPerFrame / 3) * 3;
        // DBG("read: " << read);
        // DBG("pos: " << mFileHandle->Position());
 
        bool ok = int(read) == mbytesPerFrame;
        if (!ok) {
            DBG("readFrameAt failed - read: "
                << read << ", mbytesPerFrame: " << mbytesPerFrame << ", frame:"
                << frameNumber << ", left: " << mFileHandle->bytesLeft());
        }
        return ok;
    }
}

References DBG, FASTLED_DBG, mbytesPerFrame, mFileHandle, mUsingByteStream, and fl::Frame::rgb().

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