[libcamera-devel] [PATCH 3/3] android: camera_device: Generate template for Video

[Jacopo Mondi]

Hi Laurent,

On Tue, Mar 09, 2021 at 02:02:29AM +0200, Laurent Pinchart wrote:
> Hi Jacopo,
>
> Thank you for the patch.
>
> On Mon, Mar 08, 2021 at 06:07:28PM +0100, Jacopo Mondi wrote:
> > The capture request template for video recording use cases requires
> > a fixed FPS range. Generate the request templates for the VIDEO_RECORD
> > and VIDEO_SNAPSHOT capture intents using the preview template and
> > updating the supported FPS range.
> >
> > This change fixes the CTS tests
> > android.hardware.camera2.cts.CameraDeviceTest#testCameraDeviceRecordingTemplate
> >
> > Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
> > ---
> >  src/android/camera_device.cpp | 39 +++++++++++++++++++++++++++++------
> >  src/android/camera_device.h   |  1 +
> >  2 files changed, 34 insertions(+), 6 deletions(-)
> >
> > diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
> > index 0621ec26feb8..58bebab31cb8 100644
> > --- a/src/android/camera_device.cpp
> > +++ b/src/android/camera_device.cpp
> > @@ -1396,11 +1396,7 @@ CameraMetadata *CameraDevice::requestTemplatePreview()
> >  	}
> >
> >  	/*
> > -	 * \todo Depending on the requested CaptureIntent, the FPS range
> > -	 * needs to be adjusted. For example, the capture template for
> > -	 * video capture intent shall report a fixed value.
> > -	 *
> > -	 * Also assume the AE_AVAILABLE_TARGET_FPS_RANGE static metadata
> > +	 * Assume the AE_AVAILABLE_TARGET_FPS_RANGE static metadata
> >  	 * has been assembled as {{min, max} {max, max}}.
> >  	 */
> >  	requestTemplate->addEntry(ANDROID_CONTROL_AE_TARGET_FPS_RANGE,
> > @@ -1474,6 +1470,30 @@ CameraMetadata *CameraDevice::requestTemplatePreview()
> >  	return requestTemplate;
> >  }
> >
> > +CameraMetadata *CameraDevice::requestTemplateVideo()
> > +{
> > +	CameraMetadata *previewTemplate = requestTemplatePreview();
> > +	if (!previewTemplate)
> > +		return nullptr;
> > +
> > +	/*
> > +	 * The video template requires a fixed FPS range. Everything else
> > +	 * stays the same as the preview template.
> > +	 */
> > +	camera_metadata_ro_entry_t entry;
> > +	staticMetadata_->getEntry(ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES,
> > +				  &entry);
> > +
> > +	/*
> > +	 * Assume the AE_AVAILABLE_TARGET_FPS_RANGE static metadata
> > +	 * has been assembled as {{min, max} {max, max}}.
> > +	 */
> > +	previewTemplate->updateEntry(ANDROID_CONTROL_AE_TARGET_FPS_RANGE,
> > +				     entry.data.i32 + 2, 2);
> > +
> > +	return previewTemplate;
> > +}
> > +
> >  /*
> >   * Produce a metadata pack to be used as template for a capture request.
> >   */
> > @@ -1489,14 +1509,22 @@ const camera_metadata_t *CameraDevice::constructDefaultRequestSettings(int type)
> >  	switch (type) {
> >  	case CAMERA3_TEMPLATE_PREVIEW:
> >  		captureIntent = ANDROID_CONTROL_CAPTURE_INTENT_PREVIEW;
> > +		requestTemplate = requestTemplatePreview();
> >  		break;
> >  	case CAMERA3_TEMPLATE_STILL_CAPTURE:
> > +		/*
> > +		 * Use the preview template for still capture, they only differ
> > +		 * for the torch mode we currently do not support.
> > +		 */
> >  		captureIntent = ANDROID_CONTROL_CAPTURE_INTENT_STILL_CAPTURE;
> > +		requestTemplate = requestTemplatePreview();
> >  		break;
> >  	case CAMERA3_TEMPLATE_VIDEO_RECORD:
> > +		requestTemplate = requestTemplateVideo();
> >  		captureIntent = ANDROID_CONTROL_CAPTURE_INTENT_VIDEO_RECORD;
>
> Nit-picking, I'd swap the two lines to align with the previous two
> cases. Same for video snapshot.

Oh indeed! I'll fix this

Thanks
   j
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>
> >  		break;
> >  	case CAMERA3_TEMPLATE_VIDEO_SNAPSHOT:
> > +		requestTemplate = requestTemplateVideo();
> >  		captureIntent = ANDROID_CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT;
> >  		break;
> >  	/* \todo Implement templates generation for the remaining use cases. */
> > @@ -1507,7 +1535,6 @@ const camera_metadata_t *CameraDevice::constructDefaultRequestSettings(int type)
> >  		return nullptr;
> >  	}
> >
> > -	requestTemplate = requestTemplatePreview();
> >  	if (!requestTemplate || !requestTemplate->isValid()) {
> >  		LOG(HAL, Error) << "Failed to construct request template";
> >  		delete requestTemplate;
> > diff --git a/src/android/camera_device.h b/src/android/camera_device.h
> > index f96934dbf4e7..ebbd7b9b8ab1 100644
> > --- a/src/android/camera_device.h
> > +++ b/src/android/camera_device.h
> > @@ -101,6 +101,7 @@ private:
> >  	void notifyShutter(uint32_t frameNumber, uint64_t timestamp);
> >  	void notifyError(uint32_t frameNumber, camera3_stream_t *stream);
> >  	CameraMetadata *requestTemplatePreview();
> > +	CameraMetadata *requestTemplateVideo();
> >  	libcamera::PixelFormat toPixelFormat(int format) const;
> >  	int processControls(Camera3RequestDescriptor *descriptor);
> >  	std::unique_ptr<CameraMetadata> getResultMetadata(
>
> --
> Regards,
>
> Laurent Pinchart