Introduce autoprobing for decoder driver#19
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- const struct codec (.name, .type) - refer 'codec_type' enum values to their lexical names - define a V4L2 buffer type structure (.name, .type) - refer 'v4l2_buf_type' enum values to their lexical names Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
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- include libudev checks - include ACLOCAL_AMFLAGS (-I m4) - include AC_CONFIG_MACRO_DIRS([m4]) Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
- include library checks: libva, libdrm, libudev - set default_library -> shared - introduce shared library version - update configure_file to use mesonconfig.h.in this will create an autoconfig.h that only defines preprocessor definitions we need when using meson Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
Without the patch, the user needs to provide working environment variables that define the video_path and media_path (via: LIBVA-V4L2_REQUEST_MEDIA_PATH and LIBVA_V4L2_REQUEST_VIDEO_PATH). This patch will introduce needed infrastructure to autoscan suitable devices. - introduce libudev support: scan the class 'media' for available v4l2 devices - introduce media topology scan: parse entities and interfaces that do provide video-decoding functionality (MEDIA_IOC_G_TOPOLOGY) - introduce decoder 'vector': store v4l2 entities that offer needed decoder capabilities - probe streaming capability for given decoder entity - if multiple capable drivers are present (offering decoding and streaming), use the first one - respect precedence of given environment variables (with validity check) Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
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[v1] autoprobing capable decoder drivers
Without the patch, user needs to provide a working environment
variables that define the video_path and media_path
(via: LIBVA-V4L2_REQUEST_MEDIA_PATH and LIBVA_V4L2_REQUEST_VIDEO_PATH)
This patch will introduce needed infrastructure to autoscan suitable devices.
video-decoding functionality (MEDIA_IOC_G_TOPOLOGY)
decoder capabilities