[camera][draft] Add camera plugin (#29)

Added the first draft version, but there are still a lot of unimplemented features.
2021-08-16 16:43:28 +09:00
parent 4c37b98e79
commit 999fdad59c
45 changed files with 3874 additions and 0 deletions
@@ -0,0 +1,68 @@
+// Copyright 2021 Sony Group Corporation. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PACKAGES_CAMERA_CAMERA_ELINUX_GST_CAMERA_H_
+#define PACKAGES_CAMERA_CAMERA_ELINUX_GST_CAMERA_H_
+
+#include <gst/gst.h>
+
+#include <memory>
+#include <shared_mutex>
+#include <string>
+
+#include "camera_stream_handler.h"
+
+class GstCamera {
+ public:
+  GstCamera(std::unique_ptr<CameraStreamHandler> handler);
+  ~GstCamera();
+
+  static void GstLibraryLoad();
+  static void GstLibraryUnload();
+
+  bool Play();
+  bool Pause();
+  bool Stop();
+
+  bool SetZoomLevel(float zoom);
+  float GetMaxZoomLevel() const { return max_zoom_level_; };
+  float GetMinZoomLevel() const { return min_zoom_level_; };
+
+  const uint8_t* GetPreviewFrameBuffer();
+  int32_t GetPreviewWidth() const { return width_; };
+  int32_t GetPreviewHeight() const { return height_; };
+
+ private:
+  struct GstCameraElements {
+    GstElement* pipeline;
+    GstElement* camerabin;
+    GstElement* video_convert;
+    GstElement* video_sink;
+    GstElement* output;
+    GstBus* bus;
+    GstBuffer* buffer;
+  };
+
+  static void HandoffHandler(GstElement* fakesink, GstBuffer* buf,
+                             GstPad* new_pad, gpointer user_data);
+  static gboolean HandleGstMessage(GstBus* bus, GstMessage* message,
+                                   gpointer user_data);
+
+  bool CreatePipeline();
+  void DestroyPipeline();
+  void Preroll();
+  void GetZoomMaxMinSize(float& max, float& min);
+
+  GstCameraElements gst_;
+  std::unique_ptr<uint32_t> pixels_;
+  int32_t width_ = -1;
+  int32_t height_ = -1;
+  std::shared_mutex mutex_buffer_;
+  std::unique_ptr<CameraStreamHandler> stream_handler_;
+  float max_zoom_level_;
+  float min_zoom_level_;
+  float zoom_level_ = 1.0f;
+};
+
+#endif  // PACKAGES_CAMERA_CAMERA_ELINUX_GST_CAMERA_H_