Hi Tim,

On Mon, 29 Nov 2021 at 16:36, Tim Harvey [off-list ref] wrote:

On Mon, Nov 29, 2021 at 10:59 AM Adam Ford [off-list ref] wrote:

..

quoted

Adam,

What deps did you install in order to get v4l2codecs building? I
installed libgudev-1.0-dev based on Nicolas' suggestion and rebuilt
(not sure if I needed to re-configure somehow) but there is still
nothing in build/subprojects/gst-plugins-bad/sys/v4l2codecs/. A 'meson
configure' tells me that v4l2codecs is set to 'auto' but I'm not sure
how to find out what dependencies are needed or what may be missing.

At least in my case (Centps-derivative), this is what I've done:

...
gst-plugins-bad| Run-time dependency gudev-1.0 found: NO (tried
pkgconfig and cmake)

Installed gudev ... and then:

...
gst-plugins-bad| Dependency gudev-1.0 found: YES 232 (cached)
...
gst-plugins-bad 1.19.3.1

    Plugins               : accurip, adpcmdec, adpcmenc, aiff, asfmux,
audiobuffersplit, audiofxbad, audiomixmatrix, audiolatency,
audiovisualizers, autoconvert, bayer,
                            camerabin, codecalpha, coloreffects,
debugutilsbad, dvbsubenc, dvbsuboverlay, dvdspu, faceoverlay,
festival, fieldanalysis, freeverb, frei0r,
                            gaudieffects, gdp, geometrictransform,
id3tag, inter, interlace, ivfparse, ivtc, jp2kdecimator, jpegformat,
rfbsrc, midi, mpegpsdemux,
                            mpegpsmux, mpegtsdemux, mpegtsmux, mxf,
netsim, rtponvif, pcapparse, pnm, proxy, legacyrawparse,
removesilence, rist, rtmp2, rtpmanagerbad,
                            sdpelem, segmentclip, siren, smooth,
speed, subenc, switchbin, timecode, transcode, videofiltersbad,
videoframe_audiolevel, videoparsersbad,
                            videosignal, vmnc, y4mdec, decklink, dvb,
fbdevsink, ipcpipeline, nvcodec, shm, v4l2codecs, hls, sctp

GStreamer current master build fails. It's a known issue which will be
fixed today:

[...]
[8/9] Compiling C object
subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
FAILED: subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
cc -Isubprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p
-Isubprojects/gst-plugins-bad/sys/v4l2codecs
-I../subprojects/gst-plugins-bad/sys/v4l2codecs
-Isubprojects/gst-plugins-bad -I../subprojects/gst-plugins-bad
-Isubprojects/gstreamer/libs -I../subprojects/gstreamer/libs
-Isubprojects/gstreamer -I../subprojects/gstreamer
-Isubprojects/gst-plugins-bad/gst-libs
-I../subprojects/gst-plugins-bad/gst-libs
-Isubprojects/gst-plugins-base/gst-libs
-I../subprojects/gst-plugins-base/gst-libs -Isubprojects/orc
-I../subprojects/orc -Isubprojects/gstreamer/gst
-Isubprojects/gst-plugins-base/gst-libs/gst/video
-Isubprojects/gst-plugins-base/gst-libs/gst/pbutils
-Isubprojects/gst-plugins-base/gst-libs/gst/audio
-Isubprojects/gst-plugins-base/gst-libs/gst/tag
-I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include
-I/usr/include/gudev-1.0 -fdiagnostics-color=always
-D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O2 -g -fvisibility=hidden
-fno-strict-aliasing -DG_DISABLE_DEPRECATED -Wmissing-prototypes
-Wdeclaration-after-statement -Wold-style-definition
-Wmissing-declarations -Wredundant-decls -Wwrite-strings -Wformat
-Wformat-security -Winit-self -Wmissing-include-dirs -Waddress
-Wno-multichar -Wvla -Wpointer-arith -fPIC -pthread -DHAVE_CONFIG_H
-MD -MQ subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
-MF subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o.d
-o subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
-c ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:92:3:
error: unknown type name ‘grefcount’
   grefcount ref_count;
   ^~~~~~~~~
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c: In
function ‘gst_v4l2_codec_vp9_dec_picture_data_new’:
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:106:3:
warning: implicit declaration of function ‘g_ref_count_init’; did you
mean ‘g_cond_init’? [-Wimplicit-function-declaration]
   g_ref_count_init (&pic_data->ref_count);
   ^~~~~~~~~~~~~~~~
   g_cond_init
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c: In
function ‘gst_v4l2_codec_vp9_dec_picture_data_ref’:
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:118:3:
warning: implicit declaration of function ‘g_ref_count_inc’; did you
mean ‘g_strv_contains’? [-Wimplicit-function-declaration]
   g_ref_count_inc (&data->ref_count);
   ^~~~~~~~~~~~~~~
   g_strv_contains
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c: In
function ‘gst_v4l2_codec_vp9_dec_picture_data_unref’:
../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:125:7:
warning: implicit declaration of function ‘g_ref_count_dec’
[-Wimplicit-function-declaration]
   if (g_ref_count_dec (&data->ref_count)) {
       ^~~~~~~~~~~~~~~
ninja: build stopped: subcommand failed.

Hope this helps get you started!
Ezequiel