[libcamera-devel] [RFC 00/12] libcamera: Rework buffer API

[Niklas Söderlund]

Hi,

This is the RFC for the new buffer API, it is posted without 
documentation just to measure if they are going in the right direction.  

I'm hoping for review of the code that touches cam, qcam and pipeline 
handlers to judge if the new API is easy and neat to use for developers.  
I'm sure the inner plumbing can be reviewed in a potential v1 where 
proper documentation will be available.

I'm sorry for the large patches at the end, but as the rework touches 
pretty much every part of the code base it's hard to break it down. If 
anyone spot any obvious way to break it down even further please let me 
know and I will work on it for v1.

This series depends on the buffer cleanup series [1].

1. [PATCH 00/10] libcamera: Fixes found while working on new buffer API 

Niklas Söderlund (12):
  test: camera: buffer_import: Remove test
  libcamera: pipelines: Explicitly allocate streams
  libcamera: pipeline: Add helper to find request from buffer
  libcamera: pipelines: Switch to helper to resolve request from buffer
  libcamera: buffer: Remove request tracking
  libcamera: stream: Add prototypes for new interface
  libcamera: buffer: Add dedicated container for buffer information
  libcamera: buffer: Add a buffer allocator
  libcamera: v4l2_videodevice: Add a buffer cache class
  libcamera: buffer: Store buffer information in separate container
  libcamera: buffer: Switch to new buffer API
  libcamera: buffer: Clean up after buffer API switch

 include/ipa/ipa_interface.h                   |   2 +-
 include/libcamera/buffer.h                    |  90 ++--
 include/libcamera/request.h                   |   8 +-
 include/libcamera/stream.h                    |  21 +-
 src/cam/buffer_writer.cpp                     |  12 +-
 src/cam/buffer_writer.h                       |   4 +-
 src/cam/capture.cpp                           |  53 ++-
 src/cam/capture.h                             |   3 +-
 src/ipa/rkisp1/rkisp1.cpp                     |  14 +-
 src/libcamera/buffer.cpp                      | 325 ++++---------
 src/libcamera/camera.cpp                      |  47 +-
 src/libcamera/include/pipeline_handler.h      |   5 +-
 src/libcamera/include/v4l2_videodevice.h      |  56 ++-
 src/libcamera/pipeline/ipu3/ipu3.cpp          | 269 ++++-------
 src/libcamera/pipeline/rkisp1/rkisp1.cpp      | 131 +++---
 src/libcamera/pipeline/uvcvideo.cpp           |  35 +-
 src/libcamera/pipeline/vimc.cpp               |  36 +-
 src/libcamera/pipeline_handler.cpp            |  15 +-
 src/libcamera/request.cpp                     |  22 +-
 src/libcamera/stream.cpp                      | 241 ----------
 src/libcamera/v4l2_videodevice.cpp            | 367 ++++++++-------
 src/qcam/main_window.cpp                      |  61 ++-
 src/qcam/main_window.h                        |   5 +-
 test/camera/buffer_import.cpp                 | 432 ------------------
 test/camera/capture.cpp                       |  33 +-
 test/camera/meson.build                       |   1 -
 test/camera/statemachine.cpp                  |  12 +-
 test/v4l2_videodevice/buffer_sharing.cpp      |  36 +-
 test/v4l2_videodevice/capture_async.cpp       |  16 +-
 test/v4l2_videodevice/request_buffers.cpp     |  11 +-
 test/v4l2_videodevice/stream_on_off.cpp       |   6 +-
 test/v4l2_videodevice/v4l2_m2mdevice.cpp      |  44 +-
 test/v4l2_videodevice/v4l2_videodevice_test.h |   2 +-
 33 files changed, 749 insertions(+), 1666 deletions(-)
 delete mode 100644 test/camera/buffer_import.cpp

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2.23.0