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v4l2codecs: mpeg2: Check that the decoder output formats

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This is to avoid exposing a decoder for which we don't support any
output format. This happens on platform using vendor formats or
not yet supported tiles formats.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>
This commit is contained in:
Nicolas Dufresne 2021-12-10 14:07:18 -05:00 committed by GStreamer Marge Bot
parent 91b7a9497b
commit c4216a693c
3 changed files with 21 additions and 4 deletions
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18
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecmpeg2dec.c
View File

@ -1048,12 +1048,28 @@ gst_v4l2_codec_mpeg2_dec_subclass_init (GstV4l2CodecMpeg2DecClass * klass,
} }
void void
gst_v4l2_codec_mpeg2_dec_register (GstPlugin * plugin, gst_v4l2_codec_mpeg2_dec_register (GstPlugin * plugin, GstV4l2Decoder * decoder,
GstV4l2CodecDevice * device, guint rank) GstV4l2CodecDevice * device, guint rank)
{ {
GstCaps *src_caps;
if (!gst_v4l2_decoder_set_sink_fmt (decoder, V4L2_PIX_FMT_MPEG2_SLICE,
320, 240, 8))
return;
src_caps = gst_v4l2_decoder_enum_src_formats (decoder);
if (gst_caps_is_empty (src_caps)) {
GST_WARNING ("Not registering MPEG2 decoder since it produces no "
"supported format");
goto done;
}
gst_v4l2_decoder_register (plugin, GST_TYPE_V4L2_CODEC_MPEG2_DEC, gst_v4l2_decoder_register (plugin, GST_TYPE_V4L2_CODEC_MPEG2_DEC,
(GClassInitFunc) gst_v4l2_codec_mpeg2_dec_subclass_init, (GClassInitFunc) gst_v4l2_codec_mpeg2_dec_subclass_init,
gst_mini_object_ref (GST_MINI_OBJECT (device)), gst_mini_object_ref (GST_MINI_OBJECT (device)),
(GInstanceInitFunc) gst_v4l2_codec_mpeg2_dec_subinit, (GInstanceInitFunc) gst_v4l2_codec_mpeg2_dec_subinit,
"v4l2sl%smpeg2dec", device, rank, NULL); "v4l2sl%smpeg2dec", device, rank, NULL);
done:
gst_caps_unref (src_caps);
} }

1
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecmpeg2dec.h
View File

@ -45,6 +45,7 @@ struct _GstV4l2CodecMpeg2DecClass
GType gst_v4l2_codec_mpeg2_dec_get_type (void); GType gst_v4l2_codec_mpeg2_dec_get_type (void);
void gst_v4l2_codec_mpeg2_dec_register (GstPlugin * plugin, void gst_v4l2_codec_mpeg2_dec_register (GstPlugin * plugin,
GstV4l2Decoder * decoder,
GstV4l2CodecDevice * device, GstV4l2CodecDevice * device,
guint rank); guint rank);

2
subprojects/gst-plugins-bad/sys/v4l2codecs/plugin.c
View File

@ -63,7 +63,7 @@ register_video_decoder (GstPlugin * plugin, GstV4l2CodecDevice * device)
case V4L2_PIX_FMT_MPEG2_SLICE: case V4L2_PIX_FMT_MPEG2_SLICE:
GST_INFO_OBJECT (decoder, "Registering %s as Mpeg2 Decoder", GST_INFO_OBJECT (decoder, "Registering %s as Mpeg2 Decoder",
device->name); device->name);
gst_v4l2_codec_mpeg2_dec_register (plugin, device, gst_v4l2_codec_mpeg2_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1); GST_RANK_PRIMARY + 1);
break; break;
case V4L2_PIX_FMT_VP9_FRAME: case V4L2_PIX_FMT_VP9_FRAME: