[libcamera-devel] [PATCH v3 2/2] libcamera: pipeline: simple: converter: Use generic converter interface

Xavier Roumegue (OSS) xavier.roumegue at oss.nxp.com
Sat Dec 10 16:15:03 CET 2022


Hi Kieran,

Thanks for your review.

On 12/7/22 13:55, Kieran Bingham wrote:
> Quoting Xavier Roumegue via libcamera-devel (2022-11-17 18:52:04)
>> Move the simple converter implementation to a generic V4L2 M2M class
>> derived from the converter interface. This latter could be used by
>> other pipeline implementations and as base class for customized V4L2 M2M
>> converters.
>>
> 
> I like the sound of this!
> 
> 
>> Signed-off-by: Xavier Roumegue <xavier.roumegue at oss.nxp.com>
>> Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>
>> ---
>>   .../internal/converter/converter_v4l2_m2m.h   |  18 +--
>>   .../libcamera/internal/converter/meson.build  |   5 +
>>   include/libcamera/internal/meson.build        |   2 +
>>   .../converter_v4l2_m2m.cpp}                   | 153 +++++++++++-------
>>   src/libcamera/converter/meson.build           |   5 +
>>   src/libcamera/meson.build                     |   1 +
>>   src/libcamera/pipeline/simple/meson.build     |   1 -
>>   src/libcamera/pipeline/simple/simple.cpp      |   6 +-
>>   8 files changed, 123 insertions(+), 68 deletions(-)
>>   rename src/libcamera/pipeline/simple/converter.h => include/libcamera/internal/converter/converter_v4l2_m2m.h (83%)
>>   create mode 100644 include/libcamera/internal/converter/meson.build
>>   rename src/libcamera/{pipeline/simple/converter.cpp => converter/converter_v4l2_m2m.cpp} (68%)
>>   create mode 100644 src/libcamera/converter/meson.build
>>
>> diff --git a/src/libcamera/pipeline/simple/converter.h b/include/libcamera/internal/converter/converter_v4l2_m2m.h
>> similarity index 83%
>> rename from src/libcamera/pipeline/simple/converter.h
>> rename to include/libcamera/internal/converter/converter_v4l2_m2m.h
>> index f0ebe2e0..ef31eeba 100644
>> --- a/src/libcamera/pipeline/simple/converter.h
>> +++ b/include/libcamera/internal/converter/converter_v4l2_m2m.h
>> @@ -1,8 +1,9 @@
>>   /* SPDX-License-Identifier: LGPL-2.1-or-later */
>>   /*
>>    * Copyright (C) 2020, Laurent Pinchart
>> + * Copyright 2022 NXP
>>    *
>> - * converter.h - Format converter for simple pipeline handler
>> + * converter_v4l2_m2m.h - V4l2 M2M Format converter interface
>>    */
>>   
>>   #pragma once
>> @@ -19,6 +20,8 @@
>>   #include <libcamera/base/log.h>
>>   #include <libcamera/base/signal.h>
>>   
>> +#include "libcamera/internal/converter.h"
>> +
>>   namespace libcamera {
>>   
>>   class FrameBuffer;
>> @@ -28,11 +31,12 @@ class SizeRange;
>>   struct StreamConfiguration;
>>   class V4L2M2MDevice;
>>   
>> -class SimpleConverter
>> +class V4L2M2MConverter : public Converter
>>   {
>>   public:
>> -       SimpleConverter(MediaDevice *media);
>> +       V4L2M2MConverter(MediaDevice *media);
>>   
>> +       int loadConfiguration([[maybe_unused]] const std::string &filename) { return 0; }
>>          bool isValid() const { return m2m_ != nullptr; }
>>   
>>          std::vector<PixelFormat> formats(PixelFormat input);
>> @@ -52,14 +56,11 @@ public:
>>          int queueBuffers(FrameBuffer *input,
>>                           const std::map<unsigned int, FrameBuffer *> &outputs);
>>   
>> -       Signal<FrameBuffer *> inputBufferReady;
>> -       Signal<FrameBuffer *> outputBufferReady;
>> -
>>   private:
>>          class Stream : protected Loggable
>>          {
>>          public:
>> -               Stream(SimpleConverter *converter, unsigned int index);
>> +               Stream(V4L2M2MConverter *converter, unsigned int index);
>>   
>>                  bool isValid() const { return m2m_ != nullptr; }
>>   
>> @@ -80,7 +81,7 @@ private:
>>                  void captureBufferReady(FrameBuffer *buffer);
>>                  void outputBufferReady(FrameBuffer *buffer);
>>   
>> -               SimpleConverter *converter_;
>> +               V4L2M2MConverter *converter_;
>>                  unsigned int index_;
>>                  std::unique_ptr<V4L2M2MDevice> m2m_;
>>   
>> @@ -88,7 +89,6 @@ private:
>>                  unsigned int outputBufferCount_;
>>          };
>>   
>> -       std::string deviceNode_;
>>          std::unique_ptr<V4L2M2MDevice> m2m_;
>>   
>>          std::vector<Stream> streams_;
>> diff --git a/include/libcamera/internal/converter/meson.build b/include/libcamera/internal/converter/meson.build
>> new file mode 100644
>> index 00000000..891e79e7
>> --- /dev/null
>> +++ b/include/libcamera/internal/converter/meson.build
>> @@ -0,0 +1,5 @@
>> +# SPDX-License-Identifier: CC0-1.0
>> +
>> +libcamera_internal_headers += files([
>> +    'converter_v4l2_m2m.h',
> 
> I'll be interested to see what other convertors end in here too.
> 
> I could imagine a GPU/OpenGL convertor, a libjpeg convertor ... (I guess
> that's an encoder?, but I'd imagine the same base interface?) ... or others ...
I will likely have a need for adding drm devices as converter.
> 
> 
>> +])
>> diff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build
>> index 8f50d755..b9db5a8c 100644
>> --- a/include/libcamera/internal/meson.build
>> +++ b/include/libcamera/internal/meson.build
>> @@ -45,3 +45,5 @@ libcamera_internal_headers = files([
>>       'v4l2_videodevice.h',
>>       'yaml_parser.h',
>>   ])
>> +
>> +subdir('converter')
>> diff --git a/src/libcamera/pipeline/simple/converter.cpp b/src/libcamera/converter/converter_v4l2_m2m.cpp
>> similarity index 68%
>> rename from src/libcamera/pipeline/simple/converter.cpp
>> rename to src/libcamera/converter/converter_v4l2_m2m.cpp
>> index acaaa64c..31acb048 100644
>> --- a/src/libcamera/pipeline/simple/converter.cpp
>> +++ b/src/libcamera/converter/converter_v4l2_m2m.cpp
>> @@ -1,12 +1,11 @@
>>   /* SPDX-License-Identifier: LGPL-2.1-or-later */
>>   /*
>>    * Copyright (C) 2020, Laurent Pinchart
>> + * Copyright 2022 NXP
>>    *
>> - * converter.cpp - Format converter for simple pipeline handler
>> + * converter_v4l2_m2m.cpp - V4L2 M2M Format converter
>>    */
>>   
>> -#include "converter.h"
>> -
>>   #include <algorithm>
>>   #include <limits.h>
>>   
>> @@ -20,19 +19,25 @@
>>   
>>   #include "libcamera/internal/media_device.h"
>>   #include "libcamera/internal/v4l2_videodevice.h"
>> +#include "libcamera/internal/converter/converter_v4l2_m2m.h"
>> +
>> +/**
>> + * \file internal/converter/converter_v4l2_m2m.h
>> + * \brief V4L2 M2M based converter
>> + */
>>   
>>   namespace libcamera {
>>   
>> -LOG_DECLARE_CATEGORY(SimplePipeline)
>> +LOG_DECLARE_CATEGORY(Converter)
> 
> Hrm.. no, we normally have one log category per component. I think this
> should be the V4L2M2MConvertor log category ?
> 
> But maybe we should have more generic log categories on some occasions?
> So this isn't a hard reject...
I initially started with a log category per component, but this was not 
really convenient as you had to deal with 3 different categories 
(generic converter, v4l2m2m, specialized m2m for handling dewarp 
device)...so I finally ended with this proposal, using an unique 
converter log category. I can revert to the legacy way if you dislike 
this proposal.

> 
> 
>>   
>>   /* -----------------------------------------------------------------------------
>> - * SimpleConverter::Stream
>> + * V4L2M2MConverter::Stream
>>    */
>>   
>> -SimpleConverter::Stream::Stream(SimpleConverter *converter, unsigned int index)
>> +V4L2M2MConverter::Stream::Stream(V4L2M2MConverter *converter, unsigned int index)
>>          : converter_(converter), index_(index)
>>   {
>> -       m2m_ = std::make_unique<V4L2M2MDevice>(converter->deviceNode_);
>> +       m2m_ = std::make_unique<V4L2M2MDevice>(converter->deviceNode());
>>   
>>          m2m_->output()->bufferReady.connect(this, &Stream::outputBufferReady);
>>          m2m_->capture()->bufferReady.connect(this, &Stream::captureBufferReady);
>> @@ -42,8 +47,8 @@ SimpleConverter::Stream::Stream(SimpleConverter *converter, unsigned int index)
>>                  m2m_.reset();
>>   }
>>   
>> -int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
>> -                                      const StreamConfiguration &outputCfg)
>> +int V4L2M2MConverter::Stream::configure(const StreamConfiguration &inputCfg,
>> +                                       const StreamConfiguration &outputCfg)
>>   {
>>          V4L2PixelFormat videoFormat =
>>                  m2m_->output()->toV4L2PixelFormat(inputCfg.pixelFormat);
>> @@ -56,14 +61,14 @@ int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
>>   
>>          int ret = m2m_->output()->setFormat(&format);
>>          if (ret < 0) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Failed to set input format: " << strerror(-ret);
>>                  return ret;
>>          }
>>   
>>          if (format.fourcc != videoFormat || format.size != inputCfg.size ||
>>              format.planes[0].bpl != inputCfg.stride) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Input format not supported (requested "
>>                          << inputCfg.size << "-" << videoFormat
>>                          << ", got " << format << ")";
>> @@ -78,13 +83,13 @@ int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
>>   
>>          ret = m2m_->capture()->setFormat(&format);
>>          if (ret < 0) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Failed to set output format: " << strerror(-ret);
>>                  return ret;
>>          }
>>   
>>          if (format.fourcc != videoFormat || format.size != outputCfg.size) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Output format not supported";
>>                  return -EINVAL;
>>          }
>> @@ -95,13 +100,13 @@ int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
>>          return 0;
>>   }
>>   
>> -int SimpleConverter::Stream::exportBuffers(unsigned int count,
>> -                                          std::vector<std::unique_ptr<FrameBuffer>> *buffers)
>> +int V4L2M2MConverter::Stream::exportBuffers(unsigned int count,
>> +                                           std::vector<std::unique_ptr<FrameBuffer>> *buffers)
>>   {
>>          return m2m_->capture()->exportBuffers(count, buffers);
>>   }
>>   
>> -int SimpleConverter::Stream::start()
>> +int V4L2M2MConverter::Stream::start()
>>   {
>>          int ret = m2m_->output()->importBuffers(inputBufferCount_);
>>          if (ret < 0)
>> @@ -128,7 +133,7 @@ int SimpleConverter::Stream::start()
>>          return 0;
>>   }
>>   
>> -void SimpleConverter::Stream::stop()
>> +void V4L2M2MConverter::Stream::stop()
>>   {
>>          m2m_->capture()->streamOff();
>>          m2m_->output()->streamOff();
>> @@ -136,8 +141,7 @@ void SimpleConverter::Stream::stop()
>>          m2m_->output()->releaseBuffers();
>>   }
>>   
>> -int SimpleConverter::Stream::queueBuffers(FrameBuffer *input,
>> -                                         FrameBuffer *output)
>> +int V4L2M2MConverter::Stream::queueBuffers(FrameBuffer *input, FrameBuffer *output)
>>   {
>>          int ret = m2m_->output()->queueBuffer(input);
>>          if (ret < 0)
>> @@ -150,12 +154,12 @@ int SimpleConverter::Stream::queueBuffers(FrameBuffer *input,
>>          return 0;
>>   }
>>   
>> -std::string SimpleConverter::Stream::logPrefix() const
>> +std::string V4L2M2MConverter::Stream::logPrefix() const
>>   {
>>          return "stream" + std::to_string(index_);
> 
> I'm not yet sure if this will be unique enough if we have multiple
> convertors. However given the logging infrastructure will print a file
> and line number, I think it will be clear.
> 
> So I think this is ok.
> 
> 
>>   }
>>   
>> -void SimpleConverter::Stream::outputBufferReady(FrameBuffer *buffer)
>> +void V4L2M2MConverter::Stream::outputBufferReady(FrameBuffer *buffer)
>>   {
>>          auto it = converter_->queue_.find(buffer);
>>          if (it == converter_->queue_.end())
>> @@ -167,32 +171,34 @@ void SimpleConverter::Stream::outputBufferReady(FrameBuffer *buffer)
>>          }
>>   }
>>   
>> -void SimpleConverter::Stream::captureBufferReady(FrameBuffer *buffer)
>> +void V4L2M2MConverter::Stream::captureBufferReady(FrameBuffer *buffer)
>>   {
>>          converter_->outputBufferReady.emit(buffer);
>>   }
>>   
>>   /* -----------------------------------------------------------------------------
>> - * SimpleConverter
>> + * V4L2M2MConverter
>> + */
>> +
>> +/**
>> + * \class libcamera::V4L2M2MConverter
>> + * \brief The V4L2 M2M converter implements the converter interface based on
>> + * V4L2 M2M device.
>> +*/
>> +
>> +/**
>> + * \fn V4L2M2MConverter::V4L2M2MConverter
>> + * \brief Construct a V4L2M2MConverter instance
>> + * \param[in] media The media device implementing the converter
>>    */
>>   
>> -SimpleConverter::SimpleConverter(MediaDevice *media)
>> +V4L2M2MConverter::V4L2M2MConverter(MediaDevice *media)
>> +       : Converter(media)
>>   {
>> -       /*
>> -        * Locate the video node. There's no need to validate the pipeline
>> -        * further, the caller guarantees that this is a V4L2 mem2mem device.
>> -        */
>> -       const std::vector<MediaEntity *> &entities = media->entities();
>> -       auto it = std::find_if(entities.begin(), entities.end(),
>> -                              [](MediaEntity *entity) {
>> -                                      return entity->function() == MEDIA_ENT_F_IO_V4L;
>> -                              });
>> -       if (it == entities.end())
>> +       if (deviceNode().empty())
> 
> Do we need any kind of warning here? I presume this means we were unable
> to construct a suitable convertor... Or will the Converter(media)
> initialiser have already printed an error in that instance?
> 
>>                  return;
>>   
>> -       deviceNode_ = (*it)->deviceNode();
>> -
>> -       m2m_ = std::make_unique<V4L2M2MDevice>(deviceNode_);
>> +       m2m_ = std::make_unique<V4L2M2MDevice>(deviceNode());
>>          int ret = m2m_->open();
>>          if (ret < 0) {
>>                  m2m_.reset();
>> @@ -200,7 +206,21 @@ SimpleConverter::SimpleConverter(MediaDevice *media)
>>          }
>>   }
>>   
>> -std::vector<PixelFormat> SimpleConverter::formats(PixelFormat input)
>> +/**
>> + * \fn libcamera::V4L2M2MConverter::loadConfiguration
>> + * \details \copydetails libcamera::Converter::loadConfiguration
>> + */
>> +
>> +/**
>> + * \fn libcamera::V4L2M2MConverter::isValid
>> + * \details \copydetails libcamera::Converter::isValid
>> + */
>> +
>> +/**
>> + * \fn libcamera::V4L2M2MConverter::formats
>> + * \details \copydetails libcamera::Converter::formats
>> + */
>> +std::vector<PixelFormat> V4L2M2MConverter::formats(PixelFormat input)
>>   {
>>          if (!m2m_)
>>                  return {};
>> @@ -215,13 +235,13 @@ std::vector<PixelFormat> SimpleConverter::formats(PixelFormat input)
>>   
>>          int ret = m2m_->output()->setFormat(&v4l2Format);
>>          if (ret < 0) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Failed to set format: " << strerror(-ret);
>>                  return {};
>>          }
>>   
>>          if (v4l2Format.fourcc != m2m_->output()->toV4L2PixelFormat(input)) {
>> -               LOG(SimplePipeline, Debug)
>> +               LOG(Converter, Debug)
>>                          << "Input format " << input << " not supported.";
>>                  return {};
>>          }
>> @@ -237,7 +257,10 @@ std::vector<PixelFormat> SimpleConverter::formats(PixelFormat input)
>>          return pixelFormats;
>>   }
>>   
>> -SizeRange SimpleConverter::sizes(const Size &input)
>> +/**
>> + * \copydoc libcamera::Converter::sizes
>> + */
>> +SizeRange V4L2M2MConverter::sizes(const Size &input)
>>   {
>>          if (!m2m_)
>>                  return {};
>> @@ -252,7 +275,7 @@ SizeRange SimpleConverter::sizes(const Size &input)
>>   
>>          int ret = m2m_->output()->setFormat(&format);
>>          if (ret < 0) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Failed to set format: " << strerror(-ret);
>>                  return {};
>>          }
>> @@ -262,7 +285,7 @@ SizeRange SimpleConverter::sizes(const Size &input)
>>          format.size = { 1, 1 };
>>          ret = m2m_->capture()->setFormat(&format);
>>          if (ret < 0) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Failed to set format: " << strerror(-ret);
>>                  return {};
>>          }
>> @@ -272,7 +295,7 @@ SizeRange SimpleConverter::sizes(const Size &input)
>>          format.size = { UINT_MAX, UINT_MAX };
>>          ret = m2m_->capture()->setFormat(&format);
>>          if (ret < 0) {
>> -               LOG(SimplePipeline, Error)
>> +               LOG(Converter, Error)
>>                          << "Failed to set format: " << strerror(-ret);
>>                  return {};
>>          }
>> @@ -282,9 +305,12 @@ SizeRange SimpleConverter::sizes(const Size &input)
>>          return sizes;
>>   }
>>   
>> +/**
>> + * \copydoc libcamera::Converter::strideAndFrameSize
>> + */
>>   std::tuple<unsigned int, unsigned int>
>> -SimpleConverter::strideAndFrameSize(const PixelFormat &pixelFormat,
>> -                                   const Size &size)
>> +V4L2M2MConverter::strideAndFrameSize(const PixelFormat &pixelFormat,
>> +                                    const Size &size)
>>   {
>>          V4L2DeviceFormat format;
>>          format.fourcc = m2m_->capture()->toV4L2PixelFormat(pixelFormat);
>> @@ -297,8 +323,11 @@ SimpleConverter::strideAndFrameSize(const PixelFormat &pixelFormat,
>>          return std::make_tuple(format.planes[0].bpl, format.planes[0].size);
>>   }
>>   
>> -int SimpleConverter::configure(const StreamConfiguration &inputCfg,
>> -                              const std::vector<std::reference_wrapper<StreamConfiguration>> &outputCfgs)
>> +/**
>> + * \copydoc libcamera::Converter::configure
>> + */
>> +int V4L2M2MConverter::configure(const StreamConfiguration &inputCfg,
>> +                               const std::vector<std::reference_wrapper<StreamConfiguration>> &outputCfgs)
>>   {
>>          int ret = 0;
>>   
>> @@ -309,7 +338,7 @@ int SimpleConverter::configure(const StreamConfiguration &inputCfg,
>>                  Stream &stream = streams_.emplace_back(this, i);
>>   
>>                  if (!stream.isValid()) {
>> -                       LOG(SimplePipeline, Error)
>> +                       LOG(Converter, Error)
>>                                  << "Failed to create stream " << i;
>>                          ret = -EINVAL;
>>                          break;
>> @@ -328,8 +357,11 @@ int SimpleConverter::configure(const StreamConfiguration &inputCfg,
>>          return 0;
>>   }
>>   
>> -int SimpleConverter::exportBuffers(unsigned int output, unsigned int count,
>> -                                  std::vector<std::unique_ptr<FrameBuffer>> *buffers)
>> +/**
>> + * \copydoc libcamera::Converter::exportBuffers
>> + */
>> +int V4L2M2MConverter::exportBuffers(unsigned int output, unsigned int count,
>> +                                   std::vector<std::unique_ptr<FrameBuffer>> *buffers)
>>   {
>>          if (output >= streams_.size())
>>                  return -EINVAL;
>> @@ -337,7 +369,10 @@ int SimpleConverter::exportBuffers(unsigned int output, unsigned int count,
>>          return streams_[output].exportBuffers(count, buffers);
>>   }
>>   
>> -int SimpleConverter::start()
>> +/**
>> + * \copydoc libcamera::Converter::start
>> + */
>> +int V4L2M2MConverter::start()
>>   {
>>          int ret;
>>   
>> @@ -352,14 +387,20 @@ int SimpleConverter::start()
>>          return 0;
>>   }
>>   
>> -void SimpleConverter::stop()
>> +/**
>> + * \copydoc libcamera::Converter::stop
>> + */
>> +void V4L2M2MConverter::stop()
>>   {
>>          for (Stream &stream : utils::reverse(streams_))
>>                  stream.stop();
>>   }
>>   
>> -int SimpleConverter::queueBuffers(FrameBuffer *input,
>> -                                 const std::map<unsigned int, FrameBuffer *> &outputs)
>> +/**
>> + * \copydoc libcamera::Converter::queueBuffers
>> + */
>> +int V4L2M2MConverter::queueBuffers(FrameBuffer *input,
>> +                                  const std::map<unsigned int, FrameBuffer *> &outputs)
>>   {
>>          unsigned int mask = 0;
>>          int ret;
>> @@ -402,4 +443,6 @@ int SimpleConverter::queueBuffers(FrameBuffer *input,
>>          return 0;
>>   }
>>   
>> +REGISTER_CONVERTER("v4l2_m2m", V4L2M2MConverter, "pxp")
> 
> I think the only part I'd change here is that the "pxp" might be a
> statically created array or vector of 'compatible' strings, a bit like
> the kernel would define.
> 
> Then adding support for a new compatible would just be a new line in a
> table, rather than modifying this registration. It's not much, but it
> would feel 'neater' to just have a single line patch to add an entry.
> 
static std::initializer_list<std::string> aliases = {
	"pxp"
};

REGISTER_CONVERTER("v4l2_m2m", V4L2M2MConverter, aliases)

Would it be better ?
> 
> And once again, I don't think there are any blockers there. Some things
> to consider and tidy up for a v4, but I'd be happy to merge at that.
> 
> 
> Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
> 
> 
>> +
>>   } /* namespace libcamera */
>> diff --git a/src/libcamera/converter/meson.build b/src/libcamera/converter/meson.build
>> new file mode 100644
>> index 00000000..2aa72fe4
>> --- /dev/null
>> +++ b/src/libcamera/converter/meson.build
>> @@ -0,0 +1,5 @@
>> +# SPDX-License-Identifier: CC0-1.0
>> +
>> +libcamera_sources += files([
>> +        'converter_v4l2_m2m.cpp'
>> +])
>> diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
>> index e9d0324e..ffc294f3 100644
>> --- a/src/libcamera/meson.build
>> +++ b/src/libcamera/meson.build
>> @@ -62,6 +62,7 @@ libatomic = cc.find_library('atomic', required : false)
>>   libthreads = dependency('threads')
>>   
>>   subdir('base')
>> +subdir('converter')
>>   subdir('ipa')
>>   subdir('pipeline')
>>   subdir('proxy')
>> diff --git a/src/libcamera/pipeline/simple/meson.build b/src/libcamera/pipeline/simple/meson.build
>> index 9c99b32f..42b0896d 100644
>> --- a/src/libcamera/pipeline/simple/meson.build
>> +++ b/src/libcamera/pipeline/simple/meson.build
>> @@ -1,6 +1,5 @@
>>   # SPDX-License-Identifier: CC0-1.0
>>   
>>   libcamera_sources += files([
>> -    'converter.cpp',
>>       'simple.cpp',
>>   ])
>> diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp
>> index a32de7f3..24ded4db 100644
>> --- a/src/libcamera/pipeline/simple/simple.cpp
>> +++ b/src/libcamera/pipeline/simple/simple.cpp
>> @@ -30,13 +30,13 @@
>>   
>>   #include "libcamera/internal/camera.h"
>>   #include "libcamera/internal/camera_sensor.h"
>> +#include "libcamera/internal/converter.h"
>>   #include "libcamera/internal/device_enumerator.h"
>>   #include "libcamera/internal/media_device.h"
>>   #include "libcamera/internal/pipeline_handler.h"
>>   #include "libcamera/internal/v4l2_subdevice.h"
>>   #include "libcamera/internal/v4l2_videodevice.h"
>>   
>> -#include "converter.h"
>>   
>>   namespace libcamera {
>>   
>> @@ -266,7 +266,7 @@ public:
>>          std::vector<Configuration> configs_;
>>          std::map<PixelFormat, std::vector<const Configuration *>> formats_;
>>   
>> -       std::unique_ptr<SimpleConverter> converter_;
>> +       std::unique_ptr<Converter> converter_;
>>          std::vector<std::unique_ptr<FrameBuffer>> converterBuffers_;
>>          bool useConverter_;
>>          std::queue<std::map<unsigned int, FrameBuffer *>> converterQueue_;
>> @@ -492,7 +492,7 @@ int SimpleCameraData::init()
>>          /* Open the converter, if any. */
>>          MediaDevice *converter = pipe->converter();
>>          if (converter) {
>> -               converter_ = std::make_unique<SimpleConverter>(converter);
>> +               converter_ = ConverterFactoryBase::create(converter);
>>                  if (!converter_->isValid()) {
>>                          LOG(SimplePipeline, Warning)
>>                                  << "Failed to create converter, disabling format conversion";
>> -- 
>> 2.38.1
>>


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