v4l2codecs: Add AV1 decoder

This patch adds AV1 stateless v4l2 decode support using the
new v4l2 request API to communicate with hardware accelerators.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1011>

subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecav1dec.h

@@ -0,0 +1,54 @@
+/* GStreamer
+ * Copyright (C) 2020 Daniel Almeida <daniel.almeida@collabora.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_V4L2_CODEC_AV1_DEC_H__
+#define __GST_V4L2_CODEC_AV1_DEC_H__
+
+#define GST_USE_UNSTABLE_API
+#include <gst/codecs/gstav1decoder.h>
+
+#include "gstv4l2decoder.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_V4L2_CODEC_AV1_DEC           (gst_v4l2_codec_av1_dec_get_type())
+#define GST_V4L2_CODEC_AV1_DEC(obj)           (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2_CODEC_AV1_DEC,GstV4l2CodecAV1Dec))
+#define GST_V4L2_CODEC_AV1_DEC_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2_CODEC_AV1_DEC,GstV4l2CodecAV1DecClass))
+#define GST_V4L2_CODEC_AV1_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2_CODEC_AV1_DEC, GstV4l2CodecAV1DecClass))
+#define GST_IS_V4L2_CODEC_AV1_DEC(obj)        (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2_CODEC_AV1_DEC))
+#define GST_IS_V4L2_CODEC_AV1_DEC_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2_CODEC_AV1_DEC))
+
+typedef struct _GstV4l2CodecAV1Dec GstV4l2CodecAV1Dec;
+typedef struct _GstV4l2CodecAV1DecClass GstV4l2CodecAV1DecClass;
+
+struct _GstV4l2CodecAV1DecClass
+{
+  GstAV1DecoderClass parent_class;
+  GstV4l2CodecDevice *device;
+};
+
+GType gst_v4l2_codec_av1_dec_get_type (void);
+void  gst_v4l2_codec_av1_dec_register (GstPlugin * plugin,
+                                       GstV4l2Decoder * decoder,
+                                       GstV4l2CodecDevice * device,
+                                       guint rank);
+
+G_END_DECLS
+
+#endif /* __GST_D3D11_AV1_DEC_H__ */

subprojects/gst-plugins-bad/sys/v4l2codecs/meson.build

@@ -1,6 +1,7 @@
 v4l2codecs_sources = [
   'plugin.c',
   'gstv4l2codecallocator.c',
+  'gstv4l2codecav1dec.c',
   'gstv4l2codecdevice.c',
   'gstv4l2codech264dec.c',
   'gstv4l2codech265dec.c',

subprojects/gst-plugins-bad/sys/v4l2codecs/plugin.c

@@ -22,6 +22,7 @@
 #include "config.h"
 #endif
 
+#include "gstv4l2codecav1dec.h"
 #include "gstv4l2codecdevice.h"
 #include "gstv4l2codech264dec.h"
 #include "gstv4l2codech265dec.h"
@@ -80,7 +81,12 @@ register_video_decoder (GstPlugin * plugin, GstV4l2CodecDevice * device)
         gst_v4l2_codec_vp9_dec_register (plugin, decoder, device,
             GST_RANK_PRIMARY + 1);
         break;
-
+      case V4L2_PIX_FMT_AV1_FRAME:
+        GST_INFO_OBJECT (decoder, "Registering %s as AV1 Decoder",
+            device->name);
+        gst_v4l2_codec_av1_dec_register (plugin, decoder, device,
+            GST_RANK_PRIMARY + 1);
+        break;
       default:
         GST_FIXME_OBJECT (decoder, "%" GST_FOURCC_FORMAT " is not supported.",
             GST_FOURCC_ARGS (fmt));