Hi all - thank you very much for your reviews. This is a patch series now to add Hans' patch for tracing basic controls. Changes since v3: - fix clang-tidy warnings - fix memory leaks in auto-generated code - strings: check for nullptr before assignment - remove unnecessary checks for nullptr before free() - polling: check return value - dynamic arrays: check memory allocation - put format-specific info (h264) into a union - add comment to the top of auto-generated files - replace array with std::vector for media topology - move debug/verbose options to helper functions - fix auto-gen script to include a few extra controls Changes since v2: - remove duplication in entries for numbers/strings - use media topology to find retrace devices - add specific ioctls to trace - in help msg change 'data' -> 'video frame data' - trace mem_array with space after every byte - add to trace files package version, SHA, date - retracer also generates a JSON retrace file - default trace format is "pretty" - add a "compact" format option - consolidate options for tracer/retracer - remove mutex locks as unnecessary - add more autogenerated functions - add 'clean' command to remove fd/addresses Changes since v1: - auto-generate code from uAPI headers - generated code adds some ability to trace VP9/HEVC which compiles but still needs work - generated code adds full support for MPEG2 - fix multiplanar decoding for vicodec - change library name to libv4l2tracer - update README - expand help to show options - remove extraneous files from gitignore Example: Trace an application decoding VP8: v4l2-tracer trace gst-launch-1.0 -- filesrc location=test-25fps.vp8 ! parsebin ! v4l2slvp8dec ! videocodectestsink Or trace an application decoding FWHT: v4l2-tracer trace v4l2-ctl -d3 --stream-mmap --stream-out-mmap --stream-from-hdr test-25fps.fwht --stream-to out.yuv A trace file is generated: 71827_trace.json Retrace the trace file: v4l2-tracer retrace 71827_trace.json Specify nodes if using a different driver: v4l2-tracer -d0 -m0 retrace 71827_trace.json A retrace file is generated: 71827_trace_retrace.json Remove irrelevant differences (optional) e.g. file descriptors and addresses: v4l2-tracer clean 71827_trace.json v4l2-tracer clean 71827_trace_retrace.json Clean files are generated: clean_71827_trace.json clean_71827_trace_retrace.json Use an application to compare the files: kdiff3 clean_71827_trace.json clean_71827_trace_retrace.json Deborah Brouwer (1): utils: add v4l2-tracer utility Hans Verkuil (1): v4l2-tracer: add support for most basic controls README | 8 + configure.ac | 12 + utils/Makefile.am | 5 + utils/v4l2-tracer/.gitignore | 7 + utils/v4l2-tracer/Makefile.am | 36 + utils/v4l2-tracer/libv4l2tracer.cpp | 303 +++++ utils/v4l2-tracer/retrace-helper.cpp | 262 +++++ utils/v4l2-tracer/retrace.cpp | 1373 ++++++++++++++++++++++ utils/v4l2-tracer/retrace.h | 43 + utils/v4l2-tracer/trace-helper.cpp | 500 ++++++++ utils/v4l2-tracer/trace.cpp | 603 ++++++++++ utils/v4l2-tracer/trace.h | 75 ++ utils/v4l2-tracer/v4l2-tracer-common.cpp | 476 ++++++++ utils/v4l2-tracer/v4l2-tracer-common.h | 79 ++ utils/v4l2-tracer/v4l2-tracer-gen.pl | 879 ++++++++++++++ utils/v4l2-tracer/v4l2-tracer.1.in | 111 ++ utils/v4l2-tracer/v4l2-tracer.cpp | 415 +++++++ 17 files changed, 5187 insertions(+) create mode 100644 utils/v4l2-tracer/.gitignore create mode 100644 utils/v4l2-tracer/Makefile.am create mode 100644 utils/v4l2-tracer/libv4l2tracer.cpp create mode 100644 utils/v4l2-tracer/retrace-helper.cpp create mode 100644 utils/v4l2-tracer/retrace.cpp create mode 100644 utils/v4l2-tracer/retrace.h create mode 100644 utils/v4l2-tracer/trace-helper.cpp create mode 100644 utils/v4l2-tracer/trace.cpp create mode 100644 utils/v4l2-tracer/trace.h create mode 100644 utils/v4l2-tracer/v4l2-tracer-common.cpp create mode 100644 utils/v4l2-tracer/v4l2-tracer-common.h create mode 100755 utils/v4l2-tracer/v4l2-tracer-gen.pl create mode 100644 utils/v4l2-tracer/v4l2-tracer.1.in create mode 100644 utils/v4l2-tracer/v4l2-tracer.cpp -- 2.38.0
