v4l2codecs: vp9dec: Implement VP9 v4l2 decoder

Implement a v4l2 based vp9 decoder element based on the preexisting vp8
v4l2 decoder.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.h

@@ -0,0 +1,54 @@
+
+/* GStreamer
+ * Copyright (C) 2021 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_VP9_DEC_H__
+#define __GST_V4L2_CODEC_VP9_DEC_H__
+
+#define GST_USE_UNSTABLE_API
+#include <gst/codecs/gstvp9decoder.h>
+
+#include "gstv4l2decoder.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_V4L2_CODEC_VP9_DEC           (gst_v4l2_codec_vp9_dec_get_type())
+#define GST_V4L2_CODEC_VP9_DEC(obj)           (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2_CODEC_VP9_DEC,GstV4l2CodecVp9Dec))
+#define GST_V4L2_CODEC_VP9_DEC_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2_CODEC_VP9_DEC,GstV4l2CodecVp9DecClass))
+#define GST_V4L2_CODEC_VP9_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2_CODEC_VP9_DEC, GstV4l2CodecVp9DecClass))
+#define GST_IS_V4L2_CODEC_VP9_DEC(obj)        (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2_CODEC_VP9_DEC))
+#define GST_IS_V4L2_CODEC_VP9_DEC_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2_CODEC_VP9_DEC))
+
+typedef struct _GstV4l2CodecVp9Dec GstV4l2CodecVp9Dec;
+typedef struct _GstV4l2CodecVp9DecClass GstV4l2CodecVp9DecClass;
+
+struct _GstV4l2CodecVp9DecClass
+{
+  GstVp9DecoderClass parent_class;
+  GstV4l2CodecDevice *device;
+};
+
+GType gst_v4l2_codec_vp9_dec_get_type (void);
+void  gst_v4l2_codec_vp9_dec_register (GstPlugin * plugin,
+                                        GstV4l2CodecDevice * device,
+                                        guint rank);
+
+G_END_DECLS
+
+#endif /* __GST_V4L2_CODEC_VP9_DEC_H__ */

subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2format.c

@@ -35,6 +35,7 @@ static struct FormatEntry format_map[] = {
   {V4L2_PIX_FMT_NV12, 1, GST_VIDEO_FORMAT_NV12, 8, 420},
   {V4L2_PIX_FMT_YUYV, 1, GST_VIDEO_FORMAT_YUY2, 8, 422},
   {V4L2_PIX_FMT_SUNXI_TILED_NV12, 1, GST_VIDEO_FORMAT_NV12_32L32, 8, 422},
+  {V4L2_PIX_FMT_NV12_4L4, 1, GST_VIDEO_FORMAT_NV12_4L4, 8, 420},
   {0,}
 };
 
@@ -77,6 +78,7 @@ extrapolate_stride (const GstVideoFormatInfo * finfo, gint plane, gint stride)
 
   switch (finfo->format) {
     case GST_VIDEO_FORMAT_NV12:
+    case GST_VIDEO_FORMAT_NV12_4L4:
     case GST_VIDEO_FORMAT_NV12_32L32:
     case GST_VIDEO_FORMAT_NV12_64Z32:
     case GST_VIDEO_FORMAT_NV16:

subprojects/gst-plugins-bad/sys/v4l2codecs/linux/videodev2.h

@@ -599,6 +599,7 @@ struct v4l2_pix_format {
 #define V4L2_PIX_FMT_NV24    v4l2_fourcc('N', 'V', '2', '4') /* 24  Y/CbCr 4:4:4  */
 #define V4L2_PIX_FMT_NV42    v4l2_fourcc('N', 'V', '4', '2') /* 24  Y/CrCb 4:4:4  */
 #define V4L2_PIX_FMT_HM12    v4l2_fourcc('H', 'M', '1', '2') /*  8  YUV 4:2:0 16x16 macroblocks */
+#define V4L2_PIX_FMT_NV12_4L4 v4l2_fourcc('V', 'T', '1', '2') /*  8  YUV 4:2:0 4x4 macroblocks */
 
 /* two non contiguous planes - one Y, one Cr + Cb interleaved  */
 #define V4L2_PIX_FMT_NV12M   v4l2_fourcc('N', 'M', '1', '2') /* 12  Y/CbCr 4:2:0  */

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

@@ -6,6 +6,7 @@ v4l2codecs_sources = [
   'gstv4l2codecmpeg2dec.c',
   'gstv4l2codecpool.c',
   'gstv4l2codecvp8dec.c',
+  'gstv4l2codecvp9dec.c',
   'gstv4l2decoder.c',
   'gstv4l2format.c',
   'gstv4l2codecalphadecodebin.c',

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

@@ -26,6 +26,7 @@
 #include "gstv4l2codech264dec.h"
 #include "gstv4l2codecmpeg2dec.h"
 #include "gstv4l2codecvp8dec.h"
+#include "gstv4l2codecvp9dec.h"
 #include "gstv4l2decoder.h"
 #include "linux/v4l2-controls.h"
 #include "linux/media.h"
@@ -65,6 +66,11 @@ register_video_decoder (GstPlugin * plugin, GstV4l2CodecDevice * device)
         gst_v4l2_codec_mpeg2_dec_register (plugin, device,
             GST_RANK_PRIMARY + 1);
         break;
+      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);
+        break;
 
       default:
         GST_FIXME_OBJECT (decoder, "%" GST_FOURCC_FORMAT " is not supported.",