readFrameAt()

bool fl::video::PixelStream::readFrameAt	(	fl::u32	frameNumber,
		Frame *	frame )

Definition at line 313 of file pixel_stream.cpp.hpp.

                                                                          {
    if (!mHandle || !frame || mType == kStreaming) {
        // Streaming handle doesn't support seeking
        FL_DBG("Streaming handle doesn't support seeking");
        return false;
    }
    if (!isRgb8Playback()) {
        return false;
    }
    fl::size_t frameBytes = static_cast<fl::size_t>(frameNumber)
        * static_cast<fl::size_t>(mbytesPerFrame);
    mHandle->seek(mPayloadOffset + frameBytes);
    if (mHandle->bytesLeft() == 0) {
        return false;
    }
    size_t read =
        mHandle->readRGB8(frame->rgb()) * 3;
 
    bool ok = int(read) == mbytesPerFrame;
    if (!ok) {
        DBG("readFrameAt failed - read: "
            << read << ", mbytesPerFrame: " << mbytesPerFrame << ", frame:"
            << frameNumber << ", left: " << mHandle->bytesLeft());
    }
    return ok;
}

References DBG, FL_DBG, fl::FL_NO_EXCEPT, isRgb8Playback(), kStreaming, mbytesPerFrame, mHandle, mPayloadOffset, mType, and fl::read().

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