libcamera: v4l2_videodevice: Drop toV4L2PixelFormat()

The V4L2VideoDevice::toV4L2PixelFormat() function is incorrectly
implemented, as it will pick a multi-planar format if the device
supports the multi-planar API, even if only single-planar formats are
supported. This currently works because the implementation calls
V4L2PixelFormat::fromPixelFormat(), which ignores the multiplanar
argument and always returns a single-planar format.

Fixing this isn't trivial. As we don't need to support multi-planar V4L2
formats at this point, drop the function instead of pretending
everything is fine, and call V4L2PixelFormat::fromPixelFormat() directly
from pipeline handlers. As the single-planar case is the most common,
set the multiplanar argument to false by default to avoid long lines.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/libcamera/pipeline/simple/converter.cpp b/src/libcamera/pipeline/simple/converter.cpp
index b5e34c4c..9cbc6ee3 100644
--- a/src/libcamera/pipeline/simple/converter.cpp
+++ b/src/libcamera/pipeline/simple/converter.cpp
@@ -46,7 +46,7 @@ int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
 				       const StreamConfiguration &outputCfg)
 {
 	V4L2PixelFormat videoFormat =
-		m2m_->output()->toV4L2PixelFormat(inputCfg.pixelFormat);
+		V4L2PixelFormat::fromPixelFormat(inputCfg.pixelFormat);
 
 	V4L2DeviceFormat format;
 	format.fourcc = videoFormat;
@@ -71,7 +71,7 @@ int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
 	}
 
 	/* Set the pixel format and size on the output. */
-	videoFormat = m2m_->capture()->toV4L2PixelFormat(outputCfg.pixelFormat);
+	videoFormat = V4L2PixelFormat::fromPixelFormat(outputCfg.pixelFormat);
 	format = {};
 	format.fourcc = videoFormat;
 	format.size = outputCfg.size;
@@ -210,7 +210,7 @@ std::vector<PixelFormat> SimpleConverter::formats(PixelFormat input)
 	 * enumerate the conversion capabilities on its output (V4L2 capture).
 	 */
 	V4L2DeviceFormat v4l2Format;
-	v4l2Format.fourcc = m2m_->output()->toV4L2PixelFormat(input);
+	v4l2Format.fourcc = V4L2PixelFormat::fromPixelFormat(input);
 	v4l2Format.size = { 1, 1 };
 
 	int ret = m2m_->output()->setFormat(&v4l2Format);
@@ -281,7 +281,7 @@ SimpleConverter::strideAndFrameSize(const PixelFormat &pixelFormat,
 				    const Size &size)
 {
 	V4L2DeviceFormat format;
-	format.fourcc = m2m_->capture()->toV4L2PixelFormat(pixelFormat);
+	format.fourcc = V4L2PixelFormat::fromPixelFormat(pixelFormat);
 	format.size = size;
 
 	int ret = m2m_->capture()->tryFormat(&format);