[libcamera-devel] [PATCH v1 1/2] pipeline: raspberrypi: Move sensor entity detection out of registerCamera()
Naushir Patuck
naush at raspberrypi.com
Wed Dec 1 12:57:10 CET 2021
Enumerate the sensor device entities in PipelineHandlerRPi::match() and loop
over PipelineHandlerRPi::registerCamera() for each sensor found. This will
allow the pipeline handler to register multiple cameras attached to a single
Unicam instance with a Video Mux device.
Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
---
.../pipeline/raspberrypi/raspberrypi.cpp | 35 +++++++++++--------
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
index e31fa3b23859..811160490f5c 100644
--- a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
+++ b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
@@ -314,7 +314,7 @@ private:
return static_cast<RPiCameraData *>(camera->_d());
}
- int registerCamera(MediaDevice *unicam, MediaDevice *isp);
+ int registerCamera(MediaDevice *unicam, MediaDevice *isp, MediaEntity *sensorEntity);
int queueAllBuffers(Camera *camera);
int prepareBuffers(Camera *camera);
void freeBuffers(Camera *camera);
@@ -1009,16 +1009,28 @@ bool PipelineHandlerRPi::match(DeviceEnumerator *enumerator)
return false;
}
- int ret = registerCamera(unicamDevice, ispDevice);
- if (ret) {
- LOG(RPI, Error) << "Failed to register camera: " << ret;
- return false;
+ /*
+ * The loop below is used to register multiple cameras behind one or more
+ * video mux devices that are attaced to a particular Unicam instance.
+ * Obviously these cameras cannot be used simultaneously.
+ */
+ unsigned int numCameras = 0;
+ for (MediaEntity *entity : unicamDevice->entities()) {
+ if (entity->function() != MEDIA_ENT_F_CAM_SENSOR)
+ continue;
+
+ int ret = registerCamera(unicamDevice, ispDevice, entity);
+ if (ret)
+ LOG(RPI, Error) << "Failed to register camera "
+ << entity->name() << ": " << ret;
+ else
+ numCameras++;
}
- return true;
+ return !!numCameras;
}
-int PipelineHandlerRPi::registerCamera(MediaDevice *unicam, MediaDevice *isp)
+int PipelineHandlerRPi::registerCamera(MediaDevice *unicam, MediaDevice *isp, MediaEntity *sensorEntity)
{
std::unique_ptr<RPiCameraData> data = std::make_unique<RPiCameraData>(this);
@@ -1059,14 +1071,7 @@ int PipelineHandlerRPi::registerCamera(MediaDevice *unicam, MediaDevice *isp)
data->isp_[Isp::Output1].dev()->bufferReady.connect(data.get(), &RPiCameraData::ispOutputDequeue);
data->isp_[Isp::Stats].dev()->bufferReady.connect(data.get(), &RPiCameraData::ispOutputDequeue);
- /* Identify the sensor. */
- for (MediaEntity *entity : unicam->entities()) {
- if (entity->function() == MEDIA_ENT_F_CAM_SENSOR) {
- data->sensor_ = std::make_unique<CameraSensor>(entity);
- break;
- }
- }
-
+ data->sensor_ = std::make_unique<CameraSensor>(sensorEntity);
if (!data->sensor_)
return -EINVAL;
--
2.25.1
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