add GStreamer

GStreamerPipeline.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <gst/gst.h>
+#include <gst/app/gstappsrc.h>
+#include <string>
+#include <memory>
+
+class GStreamerPipeline {
+public:
+    explicit GStreamerPipeline(const std::string& pipelineDescription);
+    ~GStreamerPipeline();
+
+    bool start();
+    void stop();
+    bool pushBuffer(uint8_t* data, size_t size, int width, int height, const std::string& format);
+    bool isRunning() const { return running_; }
+
+    void setPipelineDescription(const std::string& description);
+
+private:
+    static void onNeedData(GstAppSrc* appsrc, guint unused, gpointer user_data);
+    static void onEnoughData(GstAppSrc* appsrc, gpointer user_data);
+
+    GstElement* pipeline_;
+    GstElement* appsrc_;
+    GstBus* bus_;
+    bool running_;
+    std::string pipelineDescription_;
+    int width_;
+    int height_;
+    std::string format_;
+};