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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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3
src/libcamera/converter.cpp
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@@ -205,11 +205,14 @@ Converter::~Converter()
* \param[in] input The frame buffer to apply the conversion
* \param[out] outputs The container holding the output stream pointers and
* their respective frame buffer outputs.
* \param[in] request An optional request
*
* This function queues the \a input frame buffer on the output streams of the
* \a outputs map key and retrieve the output frame buffer indicated by the
* buffer map value.
*
* If \a request is provided the buffers are tied to that request.
*
* \return 0 on success or a negative error code otherwise
*/

12
src/libcamera/converter/converter_v4l2_m2m.cpp
View File

@@ -22,6 +22,7 @@
#include <libcamera/stream.h>
#include "libcamera/internal/media_device.h"
#include "libcamera/internal/v4l2_request.h"
#include "libcamera/internal/v4l2_videodevice.h"
/**
@@ -197,9 +198,11 @@ void V4L2M2MConverter::V4L2M2MStream::stop()
m2m_->output()->releaseBuffers();
}
int V4L2M2MConverter::V4L2M2MStream::queueBuffers(FrameBuffer *input, FrameBuffer *output)
int V4L2M2MConverter::V4L2M2MStream::queueBuffers(FrameBuffer *input,
FrameBuffer *output,
const V4L2Request *request)
{
int ret = m2m_->output()->queueBuffer(input);
int ret = m2m_->output()->queueBuffer(input, request);
if (ret < 0)
return ret;
@@ -696,7 +699,8 @@ int V4L2M2MConverter::validateOutput(StreamConfiguration *cfg, bool *adjusted,
* \copydoc libcamera::Converter::queueBuffers
*/
int V4L2M2MConverter::queueBuffers(FrameBuffer *input,
const std::map<const Stream *, FrameBuffer *> &outputs)
const std::map<const Stream *, FrameBuffer *> &outputs,
const V4L2Request *request)
{
std::set<FrameBuffer *> outputBufs;
int ret;
@@ -721,7 +725,7 @@ int V4L2M2MConverter::queueBuffers(FrameBuffer *input,
/* Queue the input and output buffers to all the streams. */
for (auto [stream, buffer] : outputs) {
ret = streams_.at(stream)->queueBuffers(input, buffer);
ret = streams_.at(stream)->queueBuffers(input, buffer, request);
if (ret < 0)
return ret;
}