--- /dev/null
+/* GStreamer
+ * Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstv4l2codech264dec.h"
+
+GST_DEBUG_CATEGORY_STATIC (v4l2_h264dec_debug);
+#define GST_CAT_DEFAULT v4l2_h264dec_debug
+
+enum
+{
+ PROP_0,
+ PROP_LAST = PROP_0
+};
+
+static GstStaticPadTemplate sink_template =
+GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SINK_NAME,
+ GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-h264, "
+ "stream-format=(string) byte-stream, alignment=(string) au")
+ );
+
+static GstStaticPadTemplate src_template =
+GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SRC_NAME,
+ GST_PAD_SRC, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ NV12, YUY2 }")));
+
+struct _GstV4l2CodecH264Dec
+{
+ GstH264Decoder parent;
+ GstV4l2Decoder *decoder;
+ GstVideoCodecState *output_state;
+ GstVideoFormat out_format;
+ gint width;
+ gint height;
+};
+
+G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstV4l2CodecH264Dec,
+ gst_v4l2_codec_h264_dec, GST_TYPE_H264_DECODER,
+ GST_DEBUG_CATEGORY_INIT (v4l2_h264dec_debug, "v4l2codecs-h264dec", 0,
+ "V4L2 stateless h264 decoder"));
+#define parent_class gst_v4l2_codec_h264_dec_parent_class
+
+static gboolean
+gst_v4l2_codec_h264_dec_open (GstVideoDecoder * decoder)
+{
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_close (GstVideoDecoder * decoder)
+{
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_stop (GstVideoDecoder * decoder)
+{
+ GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
+
+ if (self->output_state)
+ gst_video_codec_state_unref (self->output_state);
+ self->output_state = NULL;
+
+ return GST_VIDEO_DECODER_CLASS (parent_class)->stop (decoder);
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_negotiate (GstVideoDecoder * decoder)
+{
+ GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
+ GstH264Decoder *h264dec = GST_H264_DECODER (decoder);
+
+ GST_DEBUG_OBJECT (self, "negotiate");
+
+ if (self->output_state)
+ gst_video_codec_state_unref (self->output_state);
+
+ self->output_state =
+ gst_video_decoder_set_output_state (GST_VIDEO_DECODER (self),
+ self->out_format, self->width, self->height, h264dec->input_state);
+
+ self->output_state->caps = gst_video_info_to_caps (&self->output_state->info);
+
+ return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_decide_allocation (GstVideoDecoder * decoder,
+ GstQuery * query)
+{
+ return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation
+ (decoder, query);
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_new_sequence (GstH264Decoder * decoder,
+ const GstH264SPS * sps, gint max_dpb_size)
+{
+ /* TODO check if we need to setup a new format */
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_start_picture (GstH264Decoder * decoder,
+ GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb)
+{
+ return FALSE;
+}
+
+static GstFlowReturn
+gst_v4l2_codec_h264_dec_output_picture (GstH264Decoder * decoder,
+ GstH264Picture * picture)
+{
+ return GST_FLOW_ERROR;
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_end_picture (GstH264Decoder * decoder,
+ GstH264Picture * picture)
+{
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_codec_h264_dec_decode_slice (GstH264Decoder * decoder,
+ GstH264Picture * picture, GstH264Slice * slice)
+{
+ return TRUE;
+}
+
+static void
+gst_v4l2_codec_h264_dec_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (object);
+ GObject *dec = G_OBJECT (self->decoder);
+
+ switch (prop_id) {
+ default:
+ gst_v4l2_decoder_set_property (dec, prop_id - PROP_LAST, value, pspec);
+ break;
+ }
+}
+
+static void
+gst_v4l2_codec_h264_dec_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (object);
+ GObject *dec = G_OBJECT (self->decoder);
+
+ switch (prop_id) {
+ default:
+ gst_v4l2_decoder_get_property (dec, prop_id - PROP_LAST, value, pspec);
+ break;
+ }
+}
+
+static void
+gst_v4l2_codec_h264_dec_init (GstV4l2CodecH264Dec * self)
+{
+}
+
+static void
+gst_v4l2_codec_h264_dec_subinit (GstV4l2CodecH264Dec * self,
+ GstV4l2CodecH264DecClass * klass)
+{
+ self->decoder = gst_v4l2_decoder_new (klass->device);
+}
+
+static void
+gst_v4l2_codec_h264_dec_dispose (GObject * object)
+{
+ GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (object);
+
+ g_clear_object (&self->decoder);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_v4l2_codec_h264_dec_class_init (GstV4l2CodecH264DecClass * klass)
+{
+}
+
+static void
+gst_v4l2_codec_h264_dec_subclass_init (GstV4l2CodecH264DecClass * klass,
+ GstV4l2CodecDevice * device)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+ GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
+ GstH264DecoderClass *h264decoder_class = GST_H264_DECODER_CLASS (klass);
+
+ gobject_class->set_property = gst_v4l2_codec_h264_dec_set_property;
+ gobject_class->get_property = gst_v4l2_codec_h264_dec_get_property;
+ gobject_class->dispose = gst_v4l2_codec_h264_dec_dispose;
+
+ gst_element_class_set_static_metadata (element_class,
+ "V4L2 Stateless H.264 Video Decoder",
+ "Codec/Decoder/Video/Hardware",
+ "A V4L2 based H.264 video decoder",
+ "Nicolas Dufresne <nicolas.dufresne@collabora.com>");
+
+ gst_element_class_add_static_pad_template (element_class, &sink_template);
+ gst_element_class_add_static_pad_template (element_class, &src_template);
+
+ decoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_open);
+ decoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_close);
+ decoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_stop);
+ decoder_class->negotiate =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_negotiate);
+ decoder_class->decide_allocation =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_decide_allocation);
+
+ h264decoder_class->new_sequence =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_new_sequence);
+ h264decoder_class->output_picture =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_output_picture);
+ h264decoder_class->start_picture =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_start_picture);
+ h264decoder_class->decode_slice =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_decode_slice);
+ h264decoder_class->end_picture =
+ GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_end_picture);
+
+ klass->device = device;
+ gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);
+}
+
+void
+gst_v4l2_codec_h264_dec_register (GstPlugin * plugin,
+ GstV4l2CodecDevice * device, guint rank)
+{
+ GTypeQuery type_query;
+ GTypeInfo type_info = { 0, };
+ GType subtype;
+ gchar *type_name;
+
+ g_type_query (GST_TYPE_V4L2_CODEC_H264_DEC, &type_query);
+ memset (&type_info, 0, sizeof (type_info));
+ type_info.class_size = type_query.class_size;
+ type_info.instance_size = type_query.instance_size;
+ type_info.class_init = (GClassInitFunc) gst_v4l2_codec_h264_dec_subclass_init;
+ type_info.class_data = gst_mini_object_ref (GST_MINI_OBJECT (device));
+ type_info.instance_init = (GInstanceInitFunc) gst_v4l2_codec_h264_dec_subinit;
+ GST_MINI_OBJECT_FLAG_SET (device, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
+
+ /* The first decoder to be registered should use a constant name, like
+ * v4l2slh264dec, for any additional decoders, we create unique names. Decoder
+ * names may change between boots, so this should help gain stable names for
+ * the most common use cases. SL stands for state-less, we differentiate
+ * with v4l2h264dec as this element may not have the same properties */
+ type_name = g_strdup ("v4l2slh264dec");
+
+ if (g_type_from_name (type_name) != 0) {
+ gchar *basename = g_path_get_basename (device->video_device_path);
+ g_free (type_name);
+ type_name = g_strdup_printf ("v4l2sl%sh264dec", basename);
+ g_free (basename);
+ }
+
+ subtype = g_type_register_static (GST_TYPE_V4L2_CODEC_H264_DEC, type_name,
+ &type_info, 0);
+
+ if (!gst_element_register (plugin, type_name, rank, subtype))
+ GST_WARNING ("Failed to register plugin '%s'", type_name);
+
+ g_free (type_name);
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@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_H264_DEC_H__
+#define __GST_V4L2_CODEC_H264_DEC_H__
+
+#define GST_USE_UNSTABLE_API
+#include <gst/codecs/gsth264decoder.h>
+
+#include "gstv4l2decoder.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_V4L2_CODEC_H264_DEC (gst_v4l2_codec_h264_dec_get_type())
+#define GST_V4L2_CODEC_H264_DEC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2_CODEC_H264_DEC,GstV4l2CodecH264Dec))
+#define GST_V4L2_CODEC_H264_DEC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2_CODEC_H264_DEC,GstV4l2CodecH264DecClass))
+#define GST_V4L2_CODEC_H264_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2_CODEC_H264_DEC, GstV4l2CodecH264DecClass))
+#define GST_IS_V4L2_CODEC_H264_DEC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2_CODEC_H264_DEC))
+#define GST_IS_V4L2_CODEC_H264_DEC_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2_CODEC_H264_DEC))
+
+typedef struct _GstV4l2CodecH264Dec GstV4l2CodecH264Dec;
+typedef struct _GstV4l2CodecH264DecClass GstV4l2CodecH264DecClass;
+
+struct _GstV4l2CodecH264DecClass
+{
+ GstH264DecoderClass parent_class;
+ GstV4l2CodecDevice *device;
+};
+
+GType gst_v4l2_codec_h264_dec_get_type (void);
+void gst_v4l2_codec_h264_dec_register (GstPlugin * plugin,
+ GstV4l2CodecDevice * device,
+ guint rank);
+
+G_END_DECLS
+
+#endif /* __GST_D3D11_H264_DEC_H__ */