Samples - Clean up and bug fixes (#203)

* clean up samples

* fixes error seen in videoDecodeMem app with big files

samples/videoDecodePerf/videodecodeperf.cpp

@@ -50,10 +50,10 @@ void DecProc(RocVideoDecoder *p_dec, VideoDemuxer *demuxer, int *pn_frame, doubl
     } while (n_video_bytes);
 
     auto end_time = std::chrono::high_resolution_clock::now();
-    auto time_per_frame = std::chrono::duration<double, std::milli>(end_time - start_time).count();
+    auto time_per_decode = std::chrono::duration<double, std::milli>(end_time - start_time).count();
 
     // Calculate average decoding time
-    total_dec_time = time_per_frame;
+    total_dec_time = time_per_decode;
     double average_decoding_time = total_dec_time / n_frame;
     double n_fps = 1000 / average_decoding_time;
     *pn_fps = n_fps;
@@ -161,6 +161,10 @@ int main(int argc, char **argv) {
         int hip_vis_dev_count = 0;
         GetEnvVar("HIP_VISIBLE_DEVICES", hip_vis_dev_count);
 
+        std::size_t found_file = input_file_path.find_last_of('/');
+        std::cout << "info: Input file: " << input_file_path.substr(found_file + 1) << std::endl;
+        std::cout << "info: Number of threads: " << n_thread << std::endl;
+
         for (int i = 0; i < n_thread; i++) {
             std::unique_ptr<VideoDemuxer> demuxer(new VideoDemuxer(input_file_path.c_str()));
             rocDecVideoCodec rocdec_codec_id = AVCodec2RocDecVideoCodec(demuxer->GetCodecID());
@@ -189,9 +193,6 @@ int main(int argc, char **argv) {
         std::string device_name;
         int pci_bus_id, pci_domain_id, pci_device_id;
 
-        std::size_t found_file = input_file_path.find_last_of('/');
-        std::cout << "info: Input file: " << input_file_path.substr(found_file + 1) << std::endl;
-        std::cout << "info: Number of threads: " << n_thread << std::endl;
         for (int i = 0; i < n_thread; i++) {
             v_viddec[i]->GetDeviceinfo(device_name, gcn_arch_name, pci_bus_id, pci_domain_id, pci_device_id);
             std::cout << "info: stream " << i << " using GPU device " << v_device_id[i] << " - " << device_name << "[" << gcn_arch_name << "] on PCI bus " <<