Implements #168 keeping decoding on GPU

IMPORTANT: Requires a custom build of nvpipe due to bug in nvpipe.

components/codecs/src/nvpipe_decoder.cpp

@@ -69,7 +69,7 @@ bool NvPipeDecoder::decode(const ftl::codecs::Packet &pkt, cv::cuda::GpuMat &out
 	// No I-Frame yet so don't attempt to decode P-Frames.
 	if (!seen_iframe_) return false;
 
-	int rc = NvPipe_Decode(nv_decoder_, pkt.data.data(), pkt.data.size(), tmp_.data, tmp_.cols, tmp_.rows);
+	int rc = NvPipe_Decode(nv_decoder_, pkt.data.data(), pkt.data.size(), tmp_.data, tmp_.cols, tmp_.rows, tmp_.step);
 	if (rc == 0) LOG(ERROR) << "NvPipe decode error: " << NvPipe_GetError(nv_decoder_);
 
 	if (is_float_frame) {