Feature/use aligned buffer

.gitignore

@@ -12,6 +12,7 @@ Build
 # Meson
 /build
 /_build
+/builddir
 
 # vscode
 .vscode/
@@ -29,3 +30,5 @@ __pycache__
 # subprojects
 subprojects/packagecache
 subprojects/pybind11-*
+
+debian

README.md

@@ -236,7 +236,7 @@ Pylon features like `ExposureTime` or `Gain` are mapped to the gstreamer propert
 Set Exposuretime to 2000µs and Gain to 10.3dB:
 
 ```
-gst-launch-1.0 pylonsrc cam::ExposureTime=2000 cam::Gain=10.3 ! videoconvert ! autovideosink
+gst-launch-1.0 pylonsrc cam::ExposureAuto=0 cam::GainAuto=0 cam::ExposureTime=2000 cam::Gain=10.3 ! videoconvert ! autovideosink
 ```
 
 Pylon stream grabber parameters like MaxTransferSize or MaxNumBuffer are mapped to the gstreamer properties `stream::MaxTransferSize` and `stream::MaxNumBuffer`.
@@ -435,7 +435,7 @@ Install the pylon and codemeter debian packages. They will install into `/opt/py
 Install the platform dependencies:
 
 ```
-sudo apt-get install cmake meson ninja-build debhelper dh-python \
+sudo apt-get install cmake meson ninja-build debhelper dh-python fakeroot\
                      libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev gstreamer1.0-python3-plugin-loader \
                      python3 python3-dev python3-pip python3-setuptools pybind11-dev
 ```
@@ -460,7 +460,7 @@ Install the pylon and codemeter debian packages. They will install into `/opt/py
 Install the platform dependencies:
 
 ```
-sudo apt-get install cmake meson ninja-build debhelper dh-python \
+sudo apt-get install cmake meson ninja-build debhelper dh-python fakeroot\
                      libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev gstreamer1.0-python3-plugin-loader \
                      python3 python3-dev python3-pip python3-setuptools pybind11-dev \
                      deepstream-6.3 # depending on platform deepstream-6.4 or deepstream-7.0
@@ -594,9 +594,7 @@ To test without install:
 ```
 set GST_PLUGIN_PATH=build/ext/pylon
 
-%GSTREAMER_1_0_ROOT_MSVC_X86_64%\bin\gst-launch-1.0.exe
-
-pylonsrc ! videoconvert ! autovideosink
+%GSTREAMER_1_0_ROOT_MSVC_X86_64%\bin\gst-launch-1.0.exe pylonsrc ! videoconvert ! autovideosink
 ```
 
 To install into main gstreamer directory

ext/pylon/gstpylondsnvmmbufferfactory.cpp

@@ -32,6 +32,11 @@
 
 #include "gstpylondsnvmmbufferfactory.h"
 
+#if defined(__GNUC__)
+#include <stdlib.h>
+#include <unistd.h>
+#endif
+
 #include <cuda_runtime.h>
 #include <gst/video/video.h>
 
@@ -82,9 +87,14 @@ void GstPylonDsNvmmBufferFactory::AllocateBuffer(size_t buffer_size,
                                                  intptr_t &buffer_context) {
   void *buffer_mem = nullptr;
 
-  buffer_mem = g_malloc(buffer_size);
+  const size_t PAGE_SIZE = getpagesize();
+  const size_t aligned_buffer_size = RoundUp(buffer_size, PAGE_SIZE);
+
+  int ret = posix_memalign(&buffer_mem, PAGE_SIZE, aligned_buffer_size);
+  if (ret)
+    buffer_mem = nullptr;
 
-  create_params.params.size = buffer_size;
+  create_params.params.size = aligned_buffer_size;
 
   /*
    * The optimal approach would be to us the nvsurface being allocated below
@@ -111,7 +121,7 @@ void GstPylonDsNvmmBufferFactory::FreeBuffer(void *p_created_buffer,
   NvBufSurface *surf = reinterpret_cast<NvBufSurface *>(buffer_context);
 
   NvBufSurfaceDestroy(surf);
-  g_free(p_created_buffer);
+  free(p_created_buffer);
 }
 
 void GstPylonDsNvmmBufferFactory::DestroyBufferFactory() { delete this; }

ext/pylon/gstpylondsnvmmbufferfactory.h

@@ -50,9 +50,11 @@ class GstPylonDsNvmmBufferFactory : public GstPylonBufferFactory {
   virtual void DestroyBufferFactory() override;
 
  private:
+  size_t RoundUp(size_t N, size_t S) { return ((((N) + (S)-1) / (S)) * (S)); }
+
   NvBufSurfaceLayout layout;
   guint gpu_id;
   NvBufSurfaceAllocateParams create_params;
 };
 
-#endif
+#endif

ext/pylon/gstpylonsysmembufferfactory.cpp

@@ -32,15 +32,29 @@
 
 #include "gstpylonsysmembufferfactory.h"
 
+#if defined(__GNUC__)
+#include <stdlib.h>
+#include <unistd.h>
+#endif
+
 void GstPylonSysMemBufferFactory::AllocateBuffer(
     size_t buffer_size, void **p_created_buffer,
     intptr_t & /*buffer_context*/) {
-  *p_created_buffer = g_malloc(buffer_size);
+
+#if defined(__GNUC__)
+  const size_t PAGE_SIZE = getpagesize();
+  const size_t aligned_buffer_size = RoundUp(buffer_size, PAGE_SIZE);
+  int ret = posix_memalign(p_created_buffer, PAGE_SIZE, aligned_buffer_size);
+  if (ret)
+    *p_created_buffer = nullptr;
+#else
+  *p_created_buffer = malloc(buffer_size);
+#endif
 }
 
 void GstPylonSysMemBufferFactory::FreeBuffer(void *p_created_buffer,
                                              intptr_t /* buffer_context */) {
-  g_free(p_created_buffer);
+  free(p_created_buffer);
 }
 
 void GstPylonSysMemBufferFactory::DestroyBufferFactory() { delete this; }

ext/pylon/gstpylonsysmembufferfactory.h

@@ -46,6 +46,9 @@ class GstPylonSysMemBufferFactory : public GstPylonBufferFactory {
   virtual void FreeBuffer(void *p_created_buffer,
                           intptr_t buffer_context) override;
   virtual void DestroyBufferFactory() override;
+
+ private:
+  size_t RoundUp(size_t N, size_t S) { return ((((N) + (S)-1) / (S)) * (S)); }
 };
 
 #endif