videoFrame()

bool fl::Fled::videoFrame	(	fl::size	frameIndex,
		fl::size	ledCount,
		fled::VideoFrameView *	out ) const

Definition at line 147 of file fled.cpp.hpp.

                                                                  {
    if (!mImpl || !out || ledCount == 0) {
        return false;
    }
    fled::PixelStorage storage;
    if (!fled::toPixelStorage(static_cast<fled::PixelFormat>(pixelFormat()),
                              &storage)) {
        return false;
    }
    fled::VideoColor color;
    if (videoColor(&color) != fled::ColorStatus::Ok) {
        return false;
    }
    const fl::size bytesPerLed = fled::bytesPerLed(pixelFormat());
    const fl::size payloadBytes = mImpl->payloadLen();
    if (bytesPerLed == 0 || ledCount > payloadBytes / bytesPerLed) {
        return false;
    }
    const fl::size stride = ledCount * bytesPerLed;
    if (stride == 0 || payloadBytes % stride != 0 ||
        frameIndex >= payloadBytes / stride) {
        return false;
    }
    fl::size completePayloadBytes = 0;
    fl::shared_ptr<const fl::u8> payload = blob("frame_payload",
                                                &completePayloadBytes);
    if (!payload) {
        return false;
    }
    const fl::size offset = frameIndex * stride;
    out->mStorage = storage;
    out->mColor = color;
    out->mPayload = fl::shared_ptr<const fl::u8>(payload, payload.get() + offset);
    out->mPayloadBytes = stride;
    out->mStride = stride;
    return true;
}

References blob(), bytesPerLed(), fl::fled::bytesPerLed(), fl::FL_NO_EXCEPT, fl::shared_ptr< T >::get(), mImpl, offset(), fl::fled::Ok, payloadBytes(), pixelFormat(), fl::fled::toPixelStorage(), and videoColor().

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