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libcamera: converter: Add V4L2 request support

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Add V4L2 request support to the V4L2M2MConverter class. Extend the
functions related to buffer queuing with an optional request parameter
that gets passed to the lower layers.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
This commit is contained in:
Stefan Klug
2025-11-25 17:28:16 +01:00
parent cdc2620549
commit 041625628c
4 changed files with 18 additions and 7 deletions
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4
include/libcamera/internal/converter.h
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@@ -22,6 +22,7 @@
#include <libcamera/base/signal.h>
#include <libcamera/geometry.h>
#include "libcamera/internal/v4l2_request.h"
namespace libcamera {
@@ -79,7 +80,8 @@ public:
virtual void stop() = 0;
virtual int queueBuffers(FrameBuffer *input,
const std::map<const Stream *, FrameBuffer *> &outputs) = 0;
const std::map<const Stream *, FrameBuffer *> &outputs,
const V4L2Request *request = nullptr) = 0;
virtual int setInputCrop(const Stream *stream, Rectangle *rect) = 0;
virtual std::pair<Rectangle, Rectangle> inputCropBounds() = 0;

6
include/libcamera/internal/converter/converter_v4l2_m2m.h
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@@ -66,7 +66,8 @@ public:
Alignment align = Alignment::Down) override;
int queueBuffers(FrameBuffer *input,
const std::map<const Stream *, FrameBuffer *> &outputs) override;
const std::map<const Stream *, FrameBuffer *> &outputs,
const V4L2Request *request = nullptr) override;
int setInputCrop(const Stream *stream, Rectangle *rect) override;
std::pair<Rectangle, Rectangle> inputCropBounds() override { return inputCropBounds_; }
@@ -88,7 +89,8 @@ private:
int start();
void stop();
int queueBuffers(FrameBuffer *input, FrameBuffer *output);
int queueBuffers(FrameBuffer *input, FrameBuffer *output,
const V4L2Request *request = nullptr);
int setInputSelection(unsigned int target, Rectangle *rect);
int getInputSelection(unsigned int target, Rectangle *rect);