整理代码

video/v4l2/MmapDevice.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "Device.h"
+
+namespace Video
+{
+namespace V4L2
+{
+#define V4L2MMAP_NBBUFFER 10
+
+class MmapDevice: public Device
+{
+protected:
+    size_t writeInternal(char* buffer, size_t bufferSize);
+    bool   startPartialWrite();
+    size_t writePartialInternal(char*, size_t);
+    bool   endPartialWrite();
+    size_t readInternal(char* buffer, size_t bufferSize);
+
+public:
+    MmapDevice(const DeviceParameters& params, v4l2_buf_type deviceType);
+    virtual ~MmapDevice();
+
+    virtual bool init(unsigned int mandatoryCapabilities);
+    virtual bool isReady()
+    {
+        return ((m_fd != -1) && (n_buffers != 0));
+    }
+    virtual bool start();
+    virtual bool stop();
+
+protected:
+    unsigned int n_buffers;
+
+    struct buffer
+    {
+        void*  start;
+        size_t length;
+    };
+    buffer m_buffer[V4L2MMAP_NBBUFFER];
+};
+}
+}