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v4l2codecs: vp9: Add alpha decodebin wrapper

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This will allow HW accelerated decoding of WebM alpha videos.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>
This commit is contained in:
Nicolas Dufresne 2021-12-10 14:09:44 -05:00 committed by GStreamer Marge Bot
parent 31d49da237
commit e0f8ce501b
3 changed files with 60 additions and 5 deletions
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57
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c
View file

@ -23,6 +23,7 @@
#endif
#include "gstv4l2codecallocator.h"
#include "gstv4l2codecalphadecodebin.h"
#include "gstv4l2codecpool.h"
#include "gstv4l2codecvp9dec.h"
#include "linux/v4l2-controls.h"
@ -46,6 +47,13 @@ GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SINK_NAME,
GST_STATIC_CAPS ("video/x-vp9, " "alignment=(string) frame")
);
static GstStaticPadTemplate alpha_template =
GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SINK_NAME,
GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-vp9, codec-alpha = (boolean) true, "
"alignment = frame")
);
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SRC_NAME,
GST_PAD_SRC, GST_PAD_ALWAYS,
@ -1100,13 +1108,58 @@ gst_v4l2_codec_vp9_dec_subclass_init (GstV4l2CodecVp9DecClass * klass,
gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);
}
static void gst_v4l2_codec_vp9_alpha_decode_bin_subclass_init
(GstV4l2CodecAlphaDecodeBinClass * klass, gchar * decoder_name)
{
GstV4l2CodecAlphaDecodeBinClass *adbin_class =
(GstV4l2CodecAlphaDecodeBinClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
adbin_class->decoder_name = decoder_name;
gst_element_class_add_static_pad_template (element_class, &alpha_template);
gst_element_class_set_static_metadata (element_class,
"VP9 Alpha Decoder", "Codec/Decoder/Video",
"Wrapper bin to decode VP9 with alpha stream.",
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
}
void
gst_v4l2_codec_vp9_dec_register (GstPlugin * plugin,
gst_v4l2_codec_vp9_dec_register (GstPlugin * plugin, GstV4l2Decoder * decoder,
GstV4l2CodecDevice * device, guint rank)
{
gchar *element_name;
GstCaps *src_caps, *alpha_caps;
if (!gst_v4l2_decoder_set_sink_fmt (decoder, V4L2_PIX_FMT_VP9_FRAME,
320, 240, 8))
return;
src_caps = gst_v4l2_decoder_enum_src_formats (decoder);
if (gst_caps_is_empty (src_caps)) {
GST_WARNING ("Not registering VP9 decoder since it produces no "
"supported format");
goto done;
}
gst_v4l2_decoder_register (plugin, GST_TYPE_V4L2_CODEC_VP9_DEC,
(GClassInitFunc) gst_v4l2_codec_vp9_dec_subclass_init,
gst_mini_object_ref (GST_MINI_OBJECT (device)),
(GInstanceInitFunc) gst_v4l2_codec_vp9_dec_subinit,
"v4l2sl%svp9dec", device, rank, NULL);
"v4l2sl%svp9dec", device, rank, &element_name);
if (!element_name)
goto done;
alpha_caps = gst_caps_from_string ("video/x-raw,format={I420, NV12}");
if (gst_caps_can_intersect (src_caps, alpha_caps))
gst_v4l2_codec_alpha_decode_bin_register (plugin,
(GClassInitFunc) gst_v4l2_codec_vp9_alpha_decode_bin_subclass_init,
element_name, "v4l2slvp9%salphadecodebin", device, rank);
gst_caps_unref (alpha_caps);
done:
gst_caps_unref (src_caps);
}

5
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.h
View file

@ -46,8 +46,9 @@ struct _GstV4l2CodecVp9DecClass
GType gst_v4l2_codec_vp9_dec_get_type (void);
void gst_v4l2_codec_vp9_dec_register (GstPlugin * plugin,
GstV4l2CodecDevice * device,
guint rank);
GstV4l2Decoder * decoder,
GstV4l2CodecDevice * device,
guint rank);
G_END_DECLS

3
subprojects/gst-plugins-bad/sys/v4l2codecs/plugin.c
View file

@ -69,7 +69,8 @@ register_video_decoder (GstPlugin * plugin, GstV4l2CodecDevice * device)
case V4L2_PIX_FMT_VP9_FRAME:
GST_INFO_OBJECT (decoder, "Registering %s as VP9 Decoder",
device->name);
gst_v4l2_codec_vp9_dec_register (plugin, device, GST_RANK_PRIMARY + 1);
gst_v4l2_codec_vp9_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
default: