| Message ID | 20220330121806.822-1-dcnieho@gmail.com |
|---|---|
| Headers | show |
| Series | avdevice (mostly dshow) enhancements | expand |
Ping for the series, especially the first commit in the series which should spark some discussion. Thanks! Dee On Wed, Mar 30, 2022 at 2:18 PM Diederick Niehorster <dcnieho@gmail.com> wrote: > > 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 >