diff options
| -rw-r--r-- | src/libcamera/v4l2_device.cpp | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp index decd19ef..3a4df4f6 100644 --- a/src/libcamera/v4l2_device.cpp +++ b/src/libcamera/v4l2_device.cpp @@ -173,8 +173,7 @@ void V4L2Device::close() */ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids) { - unsigned int count = ids.size(); - if (count == 0) + if (ids.empty()) return {}; ControlList ctrls{ controls_ }; @@ -196,14 +195,17 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids) ctrls.set(id, {}); } - struct v4l2_ext_control v4l2Ctrls[count]; - memset(v4l2Ctrls, 0, sizeof(v4l2Ctrls)); + std::vector<v4l2_ext_control> v4l2Ctrls(ids.size()); + memset(v4l2Ctrls.data(), 0, sizeof(v4l2_ext_control) * ctrls.size()); unsigned int i = 0; for (auto &ctrl : ctrls) { unsigned int id = ctrl.first; const struct v4l2_query_ext_ctrl &info = controlInfo_[id]; + v4l2_ext_control &v4l2Ctrl = v4l2Ctrls[i++]; + v4l2Ctrl.id = id; + if (info.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) { ControlType type; @@ -223,25 +225,22 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids) value.reserve(type, true, info.elems); Span<uint8_t> data = value.data(); - v4l2Ctrls[i].p_u8 = data.data(); - v4l2Ctrls[i].size = data.size(); + v4l2Ctrl.p_u8 = data.data(); + v4l2Ctrl.size = data.size(); } - - v4l2Ctrls[i].id = id; - i++; } struct v4l2_ext_controls v4l2ExtCtrls = {}; v4l2ExtCtrls.which = V4L2_CTRL_WHICH_CUR_VAL; - v4l2ExtCtrls.controls = v4l2Ctrls; - v4l2ExtCtrls.count = count; + v4l2ExtCtrls.controls = v4l2Ctrls.data(); + v4l2ExtCtrls.count = v4l2Ctrls.size(); int ret = ioctl(VIDIOC_G_EXT_CTRLS, &v4l2ExtCtrls); if (ret) { unsigned int errorIdx = v4l2ExtCtrls.error_idx; /* Generic validation error. */ - if (errorIdx == 0 || errorIdx >= count) { + if (errorIdx == 0 || errorIdx >= v4l2Ctrls.size()) { LOG(V4L2, Error) << "Unable to read controls: " << strerror(-ret); return {}; @@ -250,10 +249,11 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids) /* A specific control failed. */ LOG(V4L2, Error) << "Unable to read control " << errorIdx << ": " << strerror(-ret); - count = errorIdx - 1; + + v4l2Ctrls.resize(errorIdx); } - updateControls(&ctrls, v4l2Ctrls, count); + updateControls(&ctrls, v4l2Ctrls.data(), v4l2Ctrls.size()); return ctrls; } |