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v4l2codecs: hevc: Add an API check

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This adds an API check and bump recommended base kernel version to 5.20.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1079>
This commit is contained in:
Nicolas Dufresne 2022-06-20 12:22:20 -04:00
parent 0eb7028570
commit a2b219c7e1
1 changed files with 66 additions and 1 deletions
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67
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codech265dec.c
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@ -31,7 +31,7 @@
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
#define V4L2_MIN_KERNEL_VER_MAJOR 5
#define V4L2_MIN_KERNEL_VER_MINOR 18
#define V4L2_MIN_KERNEL_VER_MINOR 20
#define V4L2_MIN_KERNEL_VERSION KERNEL_VERSION(V4L2_MIN_KERNEL_VER_MAJOR, V4L2_MIN_KERNEL_VER_MINOR, 0)
GST_DEBUG_CATEGORY_STATIC (v4l2_h265dec_debug);
@ -136,6 +136,66 @@ needs_start_codes (GstV4l2CodecH265Dec * self)
return self->start_code == V4L2_STATELESS_HEVC_START_CODE_ANNEX_B;
}
static gboolean
gst_v4l2_decoder_h265_api_check (GstV4l2Decoder * decoder)
{
guint i, ret_size;
/* *INDENT-OFF* */
#define SET_ID(cid) .id = (cid), .name = #cid
struct
{
const gchar *name;
unsigned int id;
unsigned int size;
gboolean optional;
} controls[] = {
{
SET_ID (V4L2_CID_STATELESS_HEVC_SPS),
.size = sizeof(struct v4l2_ctrl_hevc_sps),
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_PPS),
.size = sizeof(struct v4l2_ctrl_hevc_pps),
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_SCALING_MATRIX),
.size = sizeof(struct v4l2_ctrl_hevc_scaling_matrix),
.optional = TRUE,
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_DECODE_PARAMS),
.size = sizeof(struct v4l2_ctrl_hevc_decode_params),
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_SLICE_PARAMS),
.size = sizeof(struct v4l2_ctrl_hevc_slice_params),
.optional = TRUE,
}
};
#undef SET_ID
/* *INDENT-ON* */
/*
* Compatibility check: make sure the pointer controls are
* the right size.
*/
for (i = 0; i < G_N_ELEMENTS (controls); i++) {
gboolean control_found;
control_found = gst_v4l2_decoder_query_control_size (decoder,
controls[i].id, &ret_size);
if (!controls[i].optional && !control_found) {
GST_WARNING ("Driver is missing %s support.", controls[i].name);
return FALSE;
}
if (control_found && ret_size != controls[i].size) {
GST_WARNING ("%s control size mismatch: got %d bytes but %d expected.",
controls[i].name, ret_size, controls[i].size);
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_v4l2_codec_h265_dec_open (GstVideoDecoder * decoder)
@ -1611,6 +1671,11 @@ gst_v4l2_codec_h265_dec_register (GstPlugin * plugin, GstV4l2Decoder * decoder,
(version >> 16) & 0xff, (version >> 8) & 0xff,
V4L2_MIN_KERNEL_VER_MAJOR, V4L2_MIN_KERNEL_VER_MINOR);
if (!gst_v4l2_decoder_h265_api_check (decoder)) {
GST_WARNING ("Not registering H265 decoder as it failed ABI check.");
goto done;
}
gst_v4l2_decoder_register (plugin, GST_TYPE_V4L2_CODEC_H265_DEC,
(GClassInitFunc) gst_v4l2_codec_h265_dec_subclass_init,
gst_mini_object_ref (GST_MINI_OBJECT (device)),