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发表于 2019-12-6 16:44:23
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本帖最后由 luffy 于 2019-12-6 16:54 编辑
RK3399平台
Sensor 支持120FPS, 我设置的60FPS, 但是我v4l2读取速率一直都是30FPS, 测MIPI信号也是差不多60FPS
读取代码如下:
- int Camera::readFrame()
- {
- struct v4l2_buffer buf;
- int i, bytesused;
- CLEAR(buf);
- buf.type = m_bufType;
- buf.memory = V4L2_MEMORY_MMAP;
- if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == m_bufType) {
- struct v4l2_plane planes[FMT_NUM_PLANES];
- buf.m.planes = planes;
- buf.length = FMT_NUM_PLANES;
- }
- if (-1 == xioctl(m_camfd, VIDIOC_DQBUF, &buf)) {
- ERR("VIDIOC_DQBUF");
- return -1;
- }
- i = buf.index;
- if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == m_bufType)
- bytesused = buf.m.planes[0].bytesused;
- else
- bytesused = buf.bytesused;
- uint8_t *pdata = (uint8_t *)(m_imgBuffers[i].start);
- for (size_t i = 0; i < m_width*m_height*2; i+=2) {
- m_rawBuffer[i] = pdata[i+1];
- m_rawBuffer[i+1] = pdata[i];
- }
- if (-1 == xioctl(m_camfd, VIDIOC_QBUF, &buf)) {
- ERR("VIDIOC_QBUF");
- return -1;
- }
- return 0;
- }
- bool Camera::trigger()
- {
- struct reg_map regs[] = {
- {0x1100, 0x01},
- {REG_NULL, 0x00},
- };
- return ioctl(m_camconf_fd, SET_REGS_ONLINE_CMD, regs) == 0 ? true : false;
- }
- int Camera::nextFrame(std::vector<CameraFrame> &frames)
- {
- if (m_triggerMode) {
- if (!trigger()) {
- LOG(ERROR) << "trigger error";
- return -1;
- }
- }
- std::lock_guard<std::mutex> l(m_runLock);
- if (!m_isRunning) {
- LOG(ERROR) << "not running, can not read frame";
- return -1;
- }
- TimeMeasure tm;
- tm.addRecord("all");
- tm.addRecord("read");
- if (readFrame() == -1) {
- return -1;
- }
- LOG(INFO) << "read frame cost: " << tm.stopRecord("read") << "ms";
- CameraFrame frame;
- frame.pdata = m_rawBuffer;
- frame.step = m_width * 2;
- frame.type = kTypeGray;
- frame.width = m_width;
- frame.height = m_height;
- frame.fmt = kFmt16Gray;
- frames.push_back(frame);
- return 0;
- }
复制代码
驱动配置如下:
- {
- .width = 640,
- .height = 480,
- .max_fps = {
- .numerator = 1,
- .denominator = 120,
- },
- .hts_def = 640,
- .vts_def = 480,
- .regs_size = ARRAY_SIZE(cam_640x480_regs),
- .reg_list = cam_640x480_regs,
- },
复制代码- static int cam_g_frame_interval(struct v4l2_subdev *sd,
- struct v4l2_subdev_frame_interval *fi)
- {
- struct mycam *mycam = to_mycam(sd);
- const struct mycam_mode *mode = mycam->cur_mode;
- mutex_lock(&mycam->mutex);
- fi->interval = mode->max_fps;
- mutex_unlock(&mycam->mutex);
- return 0;
- }
复制代码
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