168     memset(&mBufferInfo, 0, sizeof(mBufferInfo));  in startStream()
169     mBufferInfo.type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;  in startStream()
170     mBufferInfo.memory   = V4L2_MEMORY_MMAP;  in startStream()
171     mBufferInfo.index    = 0;  in startStream()
172     if (ioctl(mDeviceFd, VIDIOC_QUERYBUF, &mBufferInfo) < 0) {  in startStream()
178     LOG(INFO) << "  offset: " << mBufferInfo.m.offset;  in startStream()
179     LOG(INFO) << "  length: " << mBufferInfo.length;  in startStream()
180     LOG(INFO) << "  flags : " << std::hex << mBufferInfo.flags;  in startStream()
185             mBufferInfo.length,  in startStream()
189             mBufferInfo.m.offset  in startStream()
195     memset(mPixelBuffer, 0, mBufferInfo.length);  in startStream()
199     if (ioctl(mDeviceFd, VIDIOC_QBUF, &mBufferInfo) < 0) {  in startStream()
205     int type = mBufferInfo.type;  in startStream()
239         int type = mBufferInfo.type;  in stopStream()
248     munmap(mPixelBuffer, mBufferInfo.length);  in stopStream()
272     if (ioctl(mDeviceFd, VIDIOC_QBUF, &mBufferInfo) < 0) {  in returnFrame()
286         if (ioctl(mDeviceFd, VIDIOC_DQBUF, &mBufferInfo) < 0) {  in collectFrames()
295             mCallback(this, &mBufferInfo, mPixelBuffer);  in collectFrames()