This patch series implements a series of features, mostly enhancing the dshow avdevice, but also adding new functionality to avformat. This whole patchset enabled users of the FFmpeg API to fully query and control a dshow device, making FFmpeg a nice backend for any program that needs access to, e.g., a webcam.
Different from v3 and v4, part of the patches has now been accepted, so only remaining features are in this set. Importantly, as per discussion on the list ( https://ffmpeg.org/pipermail/ffmpeg-devel/2021-June/281513.html, see especially https://ffmpeg.org/pipermail/ffmpeg-devel/2021-June/281586.html), to resolve the the unholy ABI-relationship between libavdevice and libavformat and allow easier working on the part of the avdevice API that lives in avformat, avdevice is now locked to a specific major and minor version of avformat. This is documented in libavdevice/avdevice.h. Regarding new functionality added to avformat: Querying the capabilities of a dshow device is also possible on a device that is already opened. I expect/guess however that it may not be possible to achieve that for all of the avdevices, so in principle it is important that this patchset adds the ability to create an allocated but unopened AVFormatContext+AVInputFormat with the new function avformat_alloc_input_context(). This is tested in the new device_get_capabilities example. Diederick Niehorster (21): avdevice: lock to minor version of avformat avformat: add control_message function to AVInputFormat avdevice/dshow: implement control_message interface avdevice: add control message requesting to show config dialog avdevice/dshow: accept show config dialog control message avdevice/dshow: add config dialog command for crossbar and tv tuner avdevice/avdevice: Revert "Deprecate AVDevice Capabilities API" avdevice/avdevice: clean up avdevice_capabilities_create avdevice: capabilities API details no longer public avutil/opt: document AVOptionRange min_value > max_value avdevice: Add internal helpers for querying device capabilities avdevice: change device capabilities option type avdevice: improve capabilities' option API avdevice/dshow: move audio format helpers avdevice/dshow: when closing, set context fields back to zero avdevice/dshow: implement capabilities API avdevice/dshow: cosmetics avformat: add avformat_alloc_input_context() doc/examples: adding device_get_capabilities example Makefile/examples: cosmetics avdevice/dshow: capabilities query also works on opened device configure | 2 + doc/examples/.gitignore | 1 + doc/examples/Makefile | 47 +- doc/examples/Makefile.example | 1 + doc/examples/device_get_capabilities.c | 243 ++++++++++ doc/indevs.texi | 34 ++ libavdevice/avdevice.c | 177 ++++++- libavdevice/avdevice.h | 111 ++--- libavdevice/dshow.c | 641 +++++++++++++++++++++++-- libavdevice/dshow_capture.h | 14 + libavdevice/dshow_crossbar.c | 91 ++-- libavdevice/internal.h | 66 +++ libavdevice/utils.c | 48 ++ libavdevice/version.h | 15 +- libavdevice/version_major.h | 2 +- libavformat/avformat.h | 59 ++- libavformat/demux.c | 74 ++- libavformat/utils.c | 5 + libavformat/version.h | 14 +- libavutil/avutil.h | 3 + libavutil/macros.h | 3 + libavutil/opt.c | 2 +- libavutil/opt.h | 5 + 23 files changed, 1462 insertions(+), 196 deletions(-) create mode 100644 doc/examples/device_get_capabilities.c -- 2.28.0.windows.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
