From 89fb1efac240451a2e463a405f4676910fc062b1 Mon Sep 17 00:00:00 2001
From: Paul Elder <paul.elder@ideasonboard.com>
Date: Sat, 4 Jul 2020 17:56:25 +0900
Subject: libcamera: simple: Fill stride and frameSize at config validation

Fill the stride and frameSize fields of the StreamConfiguration at
configuration validation time instead of at camera configuration time.
This allows applications to get the stride when trying a configuration
without modifying the active configuration of the camera.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
---
 src/libcamera/pipeline/simple/converter.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/libcamera/pipeline/simple/converter.cpp')

diff --git a/src/libcamera/pipeline/simple/converter.cpp b/src/libcamera/pipeline/simple/converter.cpp
index e5e2f0fd..dc7c0463 100644
--- a/src/libcamera/pipeline/simple/converter.cpp
+++ b/src/libcamera/pipeline/simple/converter.cpp
@@ -261,4 +261,19 @@ void SimpleConverter::outputBufferReady(FrameBuffer *buffer)
 	}
 }
 
+std::tuple<unsigned int, unsigned int>
+SimpleConverter::strideAndFrameSize(const Size &size,
+				    const PixelFormat &pixelFormat)
+{
+	V4L2DeviceFormat format = {};
+	format.fourcc = m2m_->capture()->toV4L2PixelFormat(pixelFormat);
+	format.size = size;
+
+	int ret = m2m_->capture()->tryFormat(&format);
+	if (ret < 0)
+		return { 0, 0 };
+
+	return { format.planes[0].bpl, format.planes[0].size };
+}
+
 } /* namespace libcamera */
-- 
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