[libcamera-devel] [PATCH 12/16] android: Populate streams and duration in the same loop

[paul.elder at ideasonboard.com]

Hi Jacopo,

On Fri, Aug 27, 2021 at 02:07:53PM +0200, Jacopo Mondi wrote:
> The ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS and
> ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS  static metadata are
> populated by looping on the streamConfigurations_ vector.
> 
> Unify them in a single loop to avoid repeating it.
> 
> Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>

Reviewed-by: Paul Elder <paul.elder at ideasonboard.com>

> ---
>  src/android/camera_capabilities.cpp | 23 ++++++++++-------------
>  1 file changed, 10 insertions(+), 13 deletions(-)
> 
> diff --git a/src/android/camera_capabilities.cpp b/src/android/camera_capabilities.cpp
> index 484242d0ad81..8bde06e824ef 100644
> --- a/src/android/camera_capabilities.cpp
> +++ b/src/android/camera_capabilities.cpp
> @@ -1255,7 +1255,9 @@ int CameraCapabilities::initializeStaticMetadata()
>  				  maxZoom);
>  
>  	std::vector<uint32_t> availableStreamConfigurations;
> +	std::vector<int64_t> minFrameDurations;
>  	availableStreamConfigurations.reserve(streamConfigurations_.size() * 4);
> +	minFrameDurations.reserve(streamConfigurations_.size() * 4);
>  	for (const auto &entry : streamConfigurations_) {
>  		/*
>  		 * Filter out YUV streams not capable of running at 30 FPS.
> @@ -1272,12 +1274,19 @@ int CameraCapabilities::initializeStaticMetadata()
>  		if (entry.androidFormat != HAL_PIXEL_FORMAT_BLOB && fps < 30)
>  			continue;
>  
> +		/* Stream configuration map. */
>  		availableStreamConfigurations.push_back(entry.androidFormat);
>  		availableStreamConfigurations.push_back(entry.resolution.width);
>  		availableStreamConfigurations.push_back(entry.resolution.height);
>  		availableStreamConfigurations.push_back(
>  			ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT);
>  
> +		/* Per-stream durations. */
> +		minFrameDurations.push_back(entry.androidFormat);
> +		minFrameDurations.push_back(entry.resolution.width);
> +		minFrameDurations.push_back(entry.resolution.height);
> +		minFrameDurations.push_back(entry.minFrameDurationNsec);
> +
>  		LOG(HAL, Debug)
>  			<< "Output Stream:" << utils::hex(entry.androidFormat)
>  			<< "(" << entry.resolution.width << "x"
> @@ -1285,22 +1294,10 @@ int CameraCapabilities::initializeStaticMetadata()
>  			<< entry.minFrameDurationNsec << "]"
>  			<< "@" << fps;
>  	}
> +
>  	staticMetadata_->addEntry(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS,
>  				  availableStreamConfigurations);
>  
> -	std::vector<int64_t> minFrameDurations;
> -	minFrameDurations.reserve(streamConfigurations_.size() * 4);
> -	for (const auto &entry : streamConfigurations_) {
> -		unsigned int fps = static_cast<unsigned int>
> -				   (floor(1e9 / entry.minFrameDurationNsec + 0.05f));
> -		if (entry.androidFormat != HAL_PIXEL_FORMAT_BLOB && fps < 30)
> -			continue;
> -
> -		minFrameDurations.push_back(entry.androidFormat);
> -		minFrameDurations.push_back(entry.resolution.width);
> -		minFrameDurations.push_back(entry.resolution.height);
> -		minFrameDurations.push_back(entry.minFrameDurationNsec);
> -	}
>  	staticMetadata_->addEntry(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS,
>  				  minFrameDurations);
>  
> -- 
> 2.32.0
>