整理代码

video/v4l2/Capture.cpp

@@ -0,0 +1,63 @@
+#include <linux/videodev2.h>
+
+#include "Capture.h"
+#include "MmapDevice.h"
+#include "ReadWriteDevice.h"
+
+namespace Video
+{
+namespace V4L2
+{
+Capture* Capture::create(const DeviceParameters& param)
+{
+    Capture* videoCapture = NULL;
+    Device*  videoDevice  = NULL;
+    int      caps         = V4L2_CAP_VIDEO_CAPTURE;
+    switch (param.m_iotype)
+    {
+    case IOTYPE_MMAP:
+        videoDevice = new MmapDevice(param, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+        caps |= V4L2_CAP_STREAMING;
+        break;
+    case IOTYPE_READWRITE:
+        videoDevice = new ReadWriteDevice(param, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+        caps |= V4L2_CAP_READWRITE;
+        break;
+    }
+
+    if (videoDevice && !videoDevice->init(caps))
+    {
+        delete videoDevice;
+        videoDevice = NULL;
+    }
+
+    if (videoDevice)
+    {
+        videoCapture = new Capture(videoDevice);
+    }
+    return videoCapture;
+}
+
+Capture::Capture(Device* device): Access(device)
+{
+}
+
+Capture::~Capture()
+{
+}
+
+bool Capture::isReadable(timeval* tv)
+{
+    int    fd = m_device->getFd();
+    fd_set fdset;
+    FD_ZERO(&fdset);
+    FD_SET(fd, &fdset);
+    return (select(fd + 1, &fdset, NULL, NULL, tv) == 1);
+}
+
+size_t Capture::read(char* buffer, size_t bufferSize)
+{
+    return m_device->readInternal(buffer, bufferSize);
+}
+}
+}