d3d11: Add support for MPEG-2 video decoding

Add DXVA/Direct3D11 API based MPEG-2 decoder element

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1969>

6 files changed, 1075 insertions, 0 deletions

diff --git a/sys/d3d11/gstd3d11decoder.c b/sys/d3d11/gstd3d11decoder.c
index 403b0d2dc..7856c9657 100644
--- a/sys/d3d11/gstd3d11decoder.c
+++ b/sys/d3d11/gstd3d11decoder.c
@@ -627,6 +627,10 @@ gst_d3d11_decoder_open (GstD3D11Decoder * decoder, GstD3D11Codec codec,
       else
         alignment = 16;
       break;
+    case GST_D3D11_CODEC_MPEG2:
+      /* XXX: ffmpeg does this */
+      alignment = 32;
+      break;
     default:
       alignment = 16;
       break;
@@ -676,6 +680,7 @@ gst_d3d11_decoder_open (GstD3D11Decoder * decoder, GstD3D11Codec codec,
       case GST_D3D11_CODEC_H265:
       case GST_D3D11_CODEC_VP9:
       case GST_D3D11_CODEC_VP8:
+      case GST_D3D11_CODEC_MPEG2:
         if (config_list[i].ConfigBitstreamRaw == 1)
           best_config = &config_list[i];
         break;
diff --git a/sys/d3d11/gstd3d11decoder.h b/sys/d3d11/gstd3d11decoder.h
index ca1732ff1..15a489705 100644
--- a/sys/d3d11/gstd3d11decoder.h
+++ b/sys/d3d11/gstd3d11decoder.h
@@ -39,6 +39,7 @@ typedef enum
   GST_D3D11_CODEC_VP9,
   GST_D3D11_CODEC_H265,
   GST_D3D11_CODEC_VP8,
+  GST_D3D11_CODEC_MPEG2,
 
   /* the last of supported codec */
   GST_D3D11_CODEC_LAST
diff --git a/sys/d3d11/gstd3d11mpeg2dec.c b/sys/d3d11/gstd3d11mpeg2dec.c
new file mode 100644
index 000000000..daf049feb
--- /dev/null
+++ b/sys/d3d11/gstd3d11mpeg2dec.c
@@ -0,0 +1,1028 @@
+/* GStreamer
+ * Copyright (C) 2021 Seungha Yang <seungha@centricular.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 "gstd3d11mpeg2dec.h"
+
+#include <gst/codecs/gstmpeg2decoder.h>
+#include <string.h>
+
+/* HACK: to expose dxva data structure on UWP */
+#ifdef WINAPI_PARTITION_DESKTOP
+#undef WINAPI_PARTITION_DESKTOP
+#endif
+#define WINAPI_PARTITION_DESKTOP 1
+#include <d3d9.h>
+#include <dxva.h>
+
+GST_DEBUG_CATEGORY_EXTERN (gst_d3d11_mpeg2_dec_debug);
+#define GST_CAT_DEFAULT gst_d3d11_mpeg2_dec_debug
+
+enum
+{
+  PROP_0,
+  PROP_ADAPTER,
+  PROP_DEVICE_ID,
+  PROP_VENDOR_ID,
+};
+
+/* copied from d3d11.h since mingw header doesn't define them */
+DEFINE_GUID (GST_GUID_D3D11_DECODER_PROFILE_MPEG2_VLD, 0xee27417f, 0x5e28,
+    0x4e65, 0xbe, 0xea, 0x1d, 0x26, 0xb5, 0x08, 0xad, 0xc9);
+DEFINE_GUID (GST_GUID_D3D11_DECODER_PROFILE_MPEG2and1_VLD, 0x86695f12, 0x340e,
+    0x4f04, 0x9f, 0xd3, 0x92, 0x53, 0xdd, 0x32, 0x74, 0x60);
+
+/* reference list 2 + 4 margin */
+#define NUM_OUTPUT_VIEW 6
+
+typedef struct _GstD3D11Mpeg2Dec
+{
+  GstMpeg2Decoder parent;
+
+  GstVideoCodecState *output_state;
+  GstD3D11Device *device;
+  GstD3D11Decoder *d3d11_decoder;
+
+  guint width, height;
+  guint width_in_mb, height_in_mb;
+  GstVideoFormat out_format;
+  GstMpegVideoSequenceHdr seq;
+  GstMpegVideoProfile profile;
+  gboolean interlaced;
+
+  /* Array of DXVA_SliceInfo  */
+  GArray *slice_list;
+  gboolean submit_iq_data;
+
+  /* Pointing current bitstream buffer */
+  guint written_buffer_size;
+  guint remaining_buffer_size;
+  guint8 *bitstream_buffer_data;
+
+  gboolean use_d3d11_output;
+} GstD3D11Mpeg2Dec;
+
+typedef struct _GstD3D11Mpeg2DecClass
+{
+  GstMpeg2DecoderClass parent_class;
+  guint adapter;
+  guint device_id;
+  guint vendor_id;
+} GstD3D11Mpeg2DecClass;
+
+static GstElementClass *parent_class = NULL;
+
+#define GST_D3D11_MPEG2_DEC(object) ((GstD3D11Mpeg2Dec *) (object))
+#define GST_D3D11_MPEG2_DEC_GET_CLASS(object) \
+    (G_TYPE_INSTANCE_GET_CLASS ((object),G_TYPE_FROM_INSTANCE (object),GstD3D11Mpeg2DecClass))
+
+static void gst_d3d11_mpeg2_dec_finalize (GObject * object);
+static void gst_d3d11_mpeg2_dec_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+static void gst_d3d11_mpeg2_dec_set_context (GstElement * element,
+    GstContext * context);
+
+static gboolean gst_d3d11_mpeg2_dec_open (GstVideoDecoder * decoder);
+static gboolean gst_d3d11_mpeg2_dec_close (GstVideoDecoder * decoder);
+static gboolean gst_d3d11_mpeg2_dec_negotiate (GstVideoDecoder * decoder);
+static gboolean gst_d3d11_mpeg2_dec_decide_allocation (GstVideoDecoder *
+    decoder, GstQuery * query);
+static gboolean gst_d3d11_mpeg2_dec_src_query (GstVideoDecoder * decoder,
+    GstQuery * query);
+
+/* GstMpeg2Decoder */
+static gboolean gst_d3d11_mpeg2_dec_new_sequence (GstMpeg2Decoder * decoder,
+    const GstMpegVideoSequenceHdr * seq,
+    const GstMpegVideoSequenceExt * seq_ext,
+    const GstMpegVideoSequenceDisplayExt * seq_display_ext,
+    const GstMpegVideoSequenceScalableExt * seq_scalable_ext);
+static gboolean gst_d3d11_mpeg2_dec_new_picture (GstMpeg2Decoder * decoder,
+    GstVideoCodecFrame * frame, GstMpeg2Picture * picture);
+static gboolean gst_d3d11_mpeg2_dec_new_field_picture (GstMpeg2Decoder *
+    decoder, const GstMpeg2Picture * first_field,
+    GstMpeg2Picture * second_field);
+static gboolean gst_d3d11_mpeg2_dec_start_picture (GstMpeg2Decoder * decoder,
+    GstMpeg2Picture * picture, GstMpeg2Slice * slice,
+    GstMpeg2Picture * prev_picture, GstMpeg2Picture * next_picture);
+static gboolean gst_d3d11_mpeg2_dec_decode_slice (GstMpeg2Decoder * decoder,
+    GstMpeg2Picture * picture, GstMpeg2Slice * slice);
+static gboolean gst_d3d11_mpeg2_dec_end_picture (GstMpeg2Decoder * decoder,
+    GstMpeg2Picture * picture);
+static GstFlowReturn gst_d3d11_mpeg2_dec_output_picture (GstMpeg2Decoder *
+    decoder, GstVideoCodecFrame * frame, GstMpeg2Picture * picture);
+
+static void
+gst_d3d11_mpeg2_dec_class_init (GstD3D11Mpeg2DecClass * klass, gpointer data)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+  GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
+  GstMpeg2DecoderClass *mpeg2decoder_class = GST_MPEG2_DECODER_CLASS (klass);
+  GstD3D11DecoderClassData *cdata = (GstD3D11DecoderClassData *) data;
+  gchar *long_name;
+
+  gobject_class->get_property = gst_d3d11_mpeg2_dec_get_property;
+  gobject_class->finalize = gst_d3d11_mpeg2_dec_finalize;
+
+  g_object_class_install_property (gobject_class, PROP_ADAPTER,
+      g_param_spec_uint ("adapter", "Adapter",
+          "DXGI Adapter index for creating device",
+          0, G_MAXUINT32, cdata->adapter,
+          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+  g_object_class_install_property (gobject_class, PROP_DEVICE_ID,
+      g_param_spec_uint ("device-id", "Device Id",
+          "DXGI Device ID", 0, G_MAXUINT32, 0,
+          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+  g_object_class_install_property (gobject_class, PROP_VENDOR_ID,
+      g_param_spec_uint ("vendor-id", "Vendor Id",
+          "DXGI Vendor ID", 0, G_MAXUINT32, 0,
+          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  klass->adapter = cdata->adapter;
+  klass->device_id = cdata->device_id;
+  klass->vendor_id = cdata->vendor_id;
+
+  element_class->set_context =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_set_context);
+
+  long_name =
+      g_strdup_printf ("Direct3D11 MPEG2 %s Decoder", cdata->description);
+  gst_element_class_set_metadata (element_class, long_name,
+      "Codec/Decoder/Video/Hardware", "A Direct3D11 based MPEG2 video decoder",
+      "Seungha Yang <seungha@centricular.com>");
+  g_free (long_name);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+          cdata->sink_caps));
+  gst_element_class_add_pad_template (element_class,
+      gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+          cdata->src_caps));
+  gst_d3d11_decoder_class_data_free (cdata);
+
+  decoder_class->open = GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_open);
+  decoder_class->close = GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_close);
+  decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_negotiate);
+  decoder_class->decide_allocation =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_decide_allocation);
+  decoder_class->src_query = GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_src_query);
+
+  mpeg2decoder_class->new_sequence =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_new_sequence);
+  mpeg2decoder_class->new_picture =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_new_picture);
+  mpeg2decoder_class->new_field_picture =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_new_field_picture);
+  mpeg2decoder_class->start_picture =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_start_picture);
+  mpeg2decoder_class->decode_slice =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_decode_slice);
+  mpeg2decoder_class->end_picture =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_end_picture);
+  mpeg2decoder_class->output_picture =
+      GST_DEBUG_FUNCPTR (gst_d3d11_mpeg2_dec_output_picture);
+}
+
+static void
+gst_d3d11_mpeg2_dec_init (GstD3D11Mpeg2Dec * self)
+{
+  self->slice_list = g_array_new (FALSE, TRUE, sizeof (DXVA_SliceInfo));
+  self->profile = GST_MPEG_VIDEO_PROFILE_MAIN;
+}
+
+static void
+gst_d3d11_mpeg2_dec_finalize (GObject * object)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (object);
+
+  g_array_unref (self->slice_list);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_d3d11_mpeg2_dec_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstD3D11Mpeg2DecClass *klass = GST_D3D11_MPEG2_DEC_GET_CLASS (object);
+
+  switch (prop_id) {
+    case PROP_ADAPTER:
+      g_value_set_uint (value, klass->adapter);
+      break;
+    case PROP_DEVICE_ID:
+      g_value_set_uint (value, klass->device_id);
+      break;
+    case PROP_VENDOR_ID:
+      g_value_set_uint (value, klass->vendor_id);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_d3d11_mpeg2_dec_set_context (GstElement * element, GstContext * context)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (element);
+  GstD3D11Mpeg2DecClass *klass = GST_D3D11_MPEG2_DEC_GET_CLASS (self);
+
+  gst_d3d11_handle_set_context (element, context, klass->adapter,
+      &self->device);
+
+  GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_open (GstVideoDecoder * decoder)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  GstD3D11Mpeg2DecClass *klass = GST_D3D11_MPEG2_DEC_GET_CLASS (self);
+
+  if (!gst_d3d11_ensure_element_data (GST_ELEMENT_CAST (self), klass->adapter,
+          &self->device)) {
+    GST_ERROR_OBJECT (self, "Cannot create d3d11device");
+    return FALSE;
+  }
+
+  self->d3d11_decoder = gst_d3d11_decoder_new (self->device);
+
+  if (!self->d3d11_decoder) {
+    GST_ERROR_OBJECT (self, "Cannot create d3d11 decoder");
+    gst_clear_object (&self->device);
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_close (GstVideoDecoder * decoder)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+
+  gst_clear_object (&self->d3d11_decoder);
+  gst_clear_object (&self->device);
+
+  return TRUE;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_negotiate (GstVideoDecoder * decoder)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  GstMpeg2Decoder *mpeg2dec = GST_MPEG2_DECODER (decoder);
+
+  if (!gst_d3d11_decoder_negotiate (decoder, mpeg2dec->input_state,
+          self->out_format, self->width, self->height,
+          self->interlaced ? GST_VIDEO_INTERLACE_MODE_MIXED :
+          GST_VIDEO_INTERLACE_MODE_PROGRESSIVE,
+          &self->output_state, &self->use_d3d11_output))
+    return FALSE;
+
+  return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_decide_allocation (GstVideoDecoder * decoder,
+    GstQuery * query)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+
+  if (!gst_d3d11_decoder_decide_allocation (decoder, query, self->device,
+          GST_D3D11_CODEC_MPEG2, self->use_d3d11_output))
+    return FALSE;
+
+  return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation
+      (decoder, query);
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_src_query (GstVideoDecoder * decoder, GstQuery * query)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_CONTEXT:
+      if (gst_d3d11_handle_context_query (GST_ELEMENT (decoder),
+              query, self->device)) {
+        return TRUE;
+      }
+      break;
+    default:
+      break;
+  }
+
+  return GST_VIDEO_DECODER_CLASS (parent_class)->src_query (decoder, query);
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_new_sequence (GstMpeg2Decoder * decoder,
+    const GstMpegVideoSequenceHdr * seq,
+    const GstMpegVideoSequenceExt * seq_ext,
+    const GstMpegVideoSequenceDisplayExt * seq_display_ext,
+    const GstMpegVideoSequenceScalableExt * seq_scalable_ext)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  gboolean interlaced;
+  gboolean modified = FALSE;
+  static const GUID *supported_profiles[] = {
+    &GST_GUID_D3D11_DECODER_PROFILE_MPEG2_VLD,
+    &GST_GUID_D3D11_DECODER_PROFILE_MPEG2and1_VLD,
+  };
+  gint width, height;
+  GstMpegVideoProfile mpeg_profile;
+
+  GST_LOG_OBJECT (self, "new sequence");
+
+  interlaced = seq_ext ? !seq_ext->progressive : FALSE;
+  if (self->interlaced != interlaced) {
+    GST_INFO_OBJECT (self, "interlaced sequence change");
+    self->interlaced = interlaced;
+    modified = TRUE;
+  }
+
+  width = seq->width;
+  height = seq->height;
+  if (seq_ext) {
+    width = (width & 0x0fff) | ((guint32) seq_ext->horiz_size_ext << 12);
+    height = (height & 0x0fff) | ((guint32) seq_ext->vert_size_ext << 12);
+  }
+
+  if (self->width != width || self->height != height) {
+    GST_INFO_OBJECT (self, "resolution change %dx%d -> %dx%d",
+        self->width, self->height, width, height);
+    self->width = width;
+    self->height = height;
+    self->width_in_mb = GST_ROUND_UP_16 (width) >> 4;
+    self->height_in_mb = GST_ROUND_UP_16 (height) >> 4;
+    modified = TRUE;
+  }
+
+  mpeg_profile = GST_MPEG_VIDEO_PROFILE_MAIN;
+  if (seq_ext)
+    mpeg_profile = seq_ext->profile;
+
+  if (mpeg_profile != GST_MPEG_VIDEO_PROFILE_MAIN &&
+      mpeg_profile != GST_MPEG_VIDEO_PROFILE_SIMPLE) {
+    GST_ERROR_OBJECT (self, "Cannot support profile %d", mpeg_profile);
+    return FALSE;
+  }
+
+  if (self->profile != mpeg_profile) {
+    GST_INFO_OBJECT (self, "Profile change %d -> %d",
+        self->profile, mpeg_profile);
+    self->profile = mpeg_profile;
+    modified = TRUE;
+  }
+
+  if (modified || !self->d3d11_decoder->opened) {
+    GstVideoInfo info;
+
+    /* FIXME: support I420 */
+    self->out_format = GST_VIDEO_FORMAT_NV12;
+
+    gst_video_info_set_format (&info,
+        self->out_format, self->width, self->height);
+
+    gst_d3d11_decoder_reset (self->d3d11_decoder);
+    if (!gst_d3d11_decoder_open (self->d3d11_decoder, GST_D3D11_CODEC_MPEG2,
+            &info, self->width, self->height, NUM_OUTPUT_VIEW,
+            supported_profiles, G_N_ELEMENTS (supported_profiles))) {
+      GST_ERROR_OBJECT (self, "Failed to create decoder");
+      return FALSE;
+    }
+
+    if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (self))) {
+      GST_ERROR_OBJECT (self, "Failed to negotiate with downstream");
+      return FALSE;
+    }
+  }
+
+  return TRUE;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_new_picture (GstMpeg2Decoder * decoder,
+    GstVideoCodecFrame * frame, GstMpeg2Picture * picture)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  GstBuffer *view_buffer;
+
+  view_buffer = gst_d3d11_decoder_get_output_view_buffer (self->d3d11_decoder);
+  if (!view_buffer) {
+    GST_ERROR_OBJECT (self, "No available output view buffer");
+    return FALSE;
+  }
+
+  GST_LOG_OBJECT (self, "New output view buffer %" GST_PTR_FORMAT, view_buffer);
+
+  gst_mpeg2_picture_set_user_data (picture,
+      view_buffer, (GDestroyNotify) gst_buffer_unref);
+
+  GST_LOG_OBJECT (self, "New MPEG2 picture %p", picture);
+
+  return TRUE;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_new_field_picture (GstMpeg2Decoder * decoder,
+    const GstMpeg2Picture * first_field, GstMpeg2Picture * second_field)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  GstBuffer *view_buffer;
+
+  view_buffer =
+      gst_mpeg2_picture_get_user_data ((GstMpeg2Picture *) first_field);
+
+  if (!view_buffer) {
+    GST_WARNING_OBJECT (self, "First picture does not have output view buffer");
+    return TRUE;
+  }
+
+  GST_LOG_OBJECT (self, "New field picture with buffer %" GST_PTR_FORMAT,
+      view_buffer);
+
+  gst_mpeg2_picture_set_user_data (second_field,
+      gst_buffer_ref (view_buffer), (GDestroyNotify) gst_buffer_unref);
+
+  return TRUE;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_get_bitstream_buffer (GstD3D11Mpeg2Dec * self)
+{
+  GST_TRACE_OBJECT (self, "Getting bitstream buffer");
+
+  self->written_buffer_size = 0;
+  self->remaining_buffer_size = 0;
+  self->bitstream_buffer_data = NULL;
+
+  if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
+          D3D11_VIDEO_DECODER_BUFFER_BITSTREAM, &self->remaining_buffer_size,
+          (gpointer *) & self->bitstream_buffer_data)) {
+    GST_ERROR_OBJECT (self, "Faild to get bitstream buffer");
+    return FALSE;
+  }
+
+  GST_TRACE_OBJECT (self, "Got bitstream buffer %p with size %d",
+      self->bitstream_buffer_data, self->remaining_buffer_size);
+  self->written_buffer_size = 0;
+
+  return TRUE;
+}
+
+static ID3D11VideoDecoderOutputView *
+gst_d3d11_mpeg2_dec_get_output_view_from_picture (GstD3D11Mpeg2Dec * self,
+    GstMpeg2Picture * picture)
+{
+  GstBuffer *view_buffer;
+  ID3D11VideoDecoderOutputView *view;
+
+  if (!picture)
+    return NULL;
+
+  view_buffer = (GstBuffer *) gst_mpeg2_picture_get_user_data (picture);
+  if (!view_buffer) {
+    GST_DEBUG_OBJECT (self, "current picture does not have output view buffer");
+    return NULL;
+  }
+
+  view =
+      gst_d3d11_decoder_get_output_view_from_buffer (self->d3d11_decoder,
+      view_buffer);
+  if (!view) {
+    GST_DEBUG_OBJECT (self, "current picture does not have output view handle");
+    return NULL;
+  }
+
+  return view;
+}
+
+static inline WORD
+_pack_f_codes (guint8 f_code[2][2])
+{
+  return (((WORD) f_code[0][0] << 12)
+      | ((WORD) f_code[0][1] << 8)
+      | ((WORD) f_code[1][0] << 4)
+      | (f_code[1][1]));
+}
+
+static inline WORD
+_pack_pce_elements (GstMpeg2Slice * slice)
+{
+  return (((WORD) slice->pic_ext->intra_dc_precision << 14)
+      | ((WORD) slice->pic_ext->picture_structure << 12)
+      | ((WORD) slice->pic_ext->top_field_first << 11)
+      | ((WORD) slice->pic_ext->frame_pred_frame_dct << 10)
+      | ((WORD) slice->pic_ext->concealment_motion_vectors << 9)
+      | ((WORD) slice->pic_ext->q_scale_type << 8)
+      | ((WORD) slice->pic_ext->intra_vlc_format << 7)
+      | ((WORD) slice->pic_ext->alternate_scan << 6)
+      | ((WORD) slice->pic_ext->repeat_first_field << 5)
+      | ((WORD) slice->pic_ext->chroma_420_type << 4)
+      | ((WORD) slice->pic_ext->progressive_frame << 3));
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_start_picture (GstMpeg2Decoder * decoder,
+    GstMpeg2Picture * picture, GstMpeg2Slice * slice,
+    GstMpeg2Picture * prev_picture, GstMpeg2Picture * next_picture)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  ID3D11VideoDecoderOutputView *view;
+  ID3D11VideoDecoderOutputView *other_view;
+  DXVA_PictureParameters pic_params = { 0, };
+  DXVA_QmatrixData iq_matrix = { 0, };
+  guint d3d11_buffer_size = 0;
+  gpointer d3d11_buffer = NULL;
+  gboolean is_field =
+      picture->structure != GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME;
+
+  view = gst_d3d11_mpeg2_dec_get_output_view_from_picture (self, picture);
+  if (!view) {
+    GST_ERROR_OBJECT (self, "current picture does not have output view handle");
+    return FALSE;
+  }
+
+  GST_TRACE_OBJECT (self, "Begin frame");
+  if (!gst_d3d11_decoder_begin_frame (self->d3d11_decoder, view, 0, NULL)) {
+    GST_ERROR_OBJECT (self, "Failed to begin frame");
+    return FALSE;
+  }
+
+  /* Fill DXVA_PictureParameters */
+  pic_params.wDecodedPictureIndex =
+      gst_d3d11_decoder_get_output_view_index (view);
+  pic_params.wForwardRefPictureIndex = 0xffff;
+  pic_params.wBackwardRefPictureIndex = 0xffff;
+
+  switch (picture->type) {
+    case GST_MPEG_VIDEO_PICTURE_TYPE_B:{
+      if (next_picture) {
+        other_view =
+            gst_d3d11_mpeg2_dec_get_output_view_from_picture (self,
+            next_picture);
+        if (other_view)
+          pic_params.wBackwardRefPictureIndex =
+              gst_d3d11_decoder_get_output_view_index (other_view);
+      }
+    }
+      /* fall-through */
+    case GST_MPEG_VIDEO_PICTURE_TYPE_P:{
+      if (prev_picture) {
+        other_view =
+            gst_d3d11_mpeg2_dec_get_output_view_from_picture (self,
+            prev_picture);
+        if (other_view)
+          pic_params.wForwardRefPictureIndex =
+              gst_d3d11_decoder_get_output_view_index (other_view);
+      }
+    }
+    default:
+      break;
+  }
+
+  pic_params.wPicWidthInMBminus1 = self->width_in_mb - 1;
+  pic_params.wPicHeightInMBminus1 = (self->height_in_mb >> is_field) - 1;
+  pic_params.bMacroblockWidthMinus1 = 15;
+  pic_params.bMacroblockHeightMinus1 = 15;
+  pic_params.bBlockWidthMinus1 = 7;
+  pic_params.bBlockHeightMinus1 = 7;
+  pic_params.bBPPminus1 = 7;
+  pic_params.bPicStructure = (BYTE) picture->structure;
+  pic_params.bSecondField = is_field && ! !picture->first_field;
+  pic_params.bPicIntra = picture->type == GST_MPEG_VIDEO_PICTURE_TYPE_I;
+  pic_params.bPicBackwardPrediction =
+      picture->type == GST_MPEG_VIDEO_PICTURE_TYPE_B;
+  /* FIXME: 1 -> 4:2:0, 2 -> 4:2:2, 3 -> 4:4:4 */
+  pic_params.bChromaFormat = 1;
+  pic_params.bPicScanFixed = 1;
+  pic_params.bPicScanMethod = slice->pic_ext->alternate_scan;
+  pic_params.wBitstreamFcodes = _pack_f_codes (slice->pic_ext->f_code);
+  pic_params.wBitstreamPCEelements = _pack_pce_elements (slice);
+
+  GST_TRACE_OBJECT (self, "Getting picture param decoder buffer");
+  if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
+          D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS, &d3d11_buffer_size,
+          &d3d11_buffer)) {
+    GST_ERROR_OBJECT (self,
+        "Failed to get decoder buffer for picture parameters");
+    return FALSE;
+  }
+
+  memcpy (d3d11_buffer, &pic_params, sizeof (pic_params));
+
+  GST_TRACE_OBJECT (self, "Release picture param decoder buffer");
+  if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
+          D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS)) {
+    GST_ERROR_OBJECT (self, "Failed to release decoder buffer");
+    return FALSE;
+  }
+
+  /* Fill DXVA_QmatrixData */
+  if (slice->quant_matrix &&
+      /* The value in bNewQmatrix[0] and bNewQmatrix[1] must not both be zero.
+       * https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/dxva/ns-dxva-_dxva_qmatrixdata
+       */
+      (slice->quant_matrix->load_intra_quantiser_matrix ||
+          slice->quant_matrix->load_non_intra_quantiser_matrix)) {
+    GstMpegVideoQuantMatrixExt *quant_matrix = slice->quant_matrix;
+    self->submit_iq_data = TRUE;
+
+    if (quant_matrix->load_intra_quantiser_matrix) {
+      iq_matrix.bNewQmatrix[0] = 1;
+      memcpy (iq_matrix.Qmatrix[0], quant_matrix->intra_quantiser_matrix,
+          sizeof (quant_matrix->intra_quantiser_matrix));
+    }
+
+    if (quant_matrix->load_non_intra_quantiser_matrix) {
+      iq_matrix.bNewQmatrix[1] = 1;
+      memcpy (iq_matrix.Qmatrix[1], quant_matrix->non_intra_quantiser_matrix,
+          sizeof (quant_matrix->non_intra_quantiser_matrix));
+    }
+
+    if (quant_matrix->load_chroma_intra_quantiser_matrix) {
+      iq_matrix.bNewQmatrix[2] = 1;
+      memcpy (iq_matrix.Qmatrix[2], quant_matrix->chroma_intra_quantiser_matrix,
+          sizeof (quant_matrix->chroma_intra_quantiser_matrix));
+    }
+
+    if (quant_matrix->load_chroma_non_intra_quantiser_matrix) {
+      iq_matrix.bNewQmatrix[3] = 1;
+      memcpy (iq_matrix.Qmatrix[3],
+          quant_matrix->chroma_non_intra_quantiser_matrix,
+          sizeof (quant_matrix->chroma_non_intra_quantiser_matrix));
+    }
+
+    GST_TRACE_OBJECT (self, "Getting inverse quantization matrix buffer");
+    if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
+            D3D11_VIDEO_DECODER_BUFFER_INVERSE_QUANTIZATION_MATRIX,
+            &d3d11_buffer_size, &d3d11_buffer)) {
+      GST_ERROR_OBJECT (self,
+          "Failed to get decoder buffer for inv. quantization matrix");
+      return FALSE;
+    }
+
+    memcpy (d3d11_buffer, &iq_matrix, sizeof (DXVA_QmatrixData));
+
+    GST_TRACE_OBJECT (self, "Release inverse quantization matrix buffer");
+    if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
+            D3D11_VIDEO_DECODER_BUFFER_INVERSE_QUANTIZATION_MATRIX)) {
+      GST_ERROR_OBJECT (self, "Failed to release decoder buffer");
+      return FALSE;
+    }
+  } else {
+    self->submit_iq_data = FALSE;
+  }
+
+  g_array_set_size (self->slice_list, 0);
+
+  return gst_d3d11_mpeg2_dec_get_bitstream_buffer (self);
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_submit_slice_data (GstD3D11Mpeg2Dec * self,
+    GstMpeg2Picture * picture)
+{
+  guint buffer_size;
+  gpointer buffer;
+  guint8 *data;
+  gsize offset = 0;
+  gint i;
+  D3D11_VIDEO_DECODER_BUFFER_DESC buffer_desc[4] = { 0, };
+  gboolean ret;
+  guint buffer_count = 0;
+  DXVA_SliceInfo *slice_data;
+  gboolean is_field =
+      picture->structure != GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME;
+  guint mb_count = self->width_in_mb * (self->height_in_mb >> is_field);
+
+  if (self->slice_list->len < 1) {
+    GST_WARNING_OBJECT (self, "Nothing to submit");
+    return FALSE;
+  }
+
+  GST_TRACE_OBJECT (self, "Getting slice control buffer");
+
+  if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
+          D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL, &buffer_size, &buffer)) {
+    GST_ERROR_OBJECT (self, "Couldn't get slice control buffer");
+    return FALSE;
+  }
+
+  data = buffer;
+  for (i = 0; i < self->slice_list->len; i++) {
+    slice_data = &g_array_index (self->slice_list, DXVA_SliceInfo, i);
+
+    /* Update the number of MBs per slice */
+    if (i == self->slice_list->len - 1) {
+      slice_data->wNumberMBsInSlice = mb_count - slice_data->wNumberMBsInSlice;
+    } else {
+      DXVA_SliceInfo *next =
+          &g_array_index (self->slice_list, DXVA_SliceInfo, i + 1);
+      slice_data->wNumberMBsInSlice =
+          next->wNumberMBsInSlice - slice_data->wNumberMBsInSlice;
+    }
+
+    memcpy (data + offset, slice_data, sizeof (DXVA_SliceInfo));
+    offset += sizeof (DXVA_SliceInfo);
+  }
+
+  GST_TRACE_OBJECT (self, "Release slice control buffer");
+  if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
+          D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL)) {
+    GST_ERROR_OBJECT (self, "Failed to release slice control buffer");
+    return FALSE;
+  }
+
+  if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
+          D3D11_VIDEO_DECODER_BUFFER_BITSTREAM)) {
+    GST_ERROR_OBJECT (self, "Failed to release bitstream buffer");
+    return FALSE;
+  }
+
+  buffer_desc[buffer_count].BufferType =
+      D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS;
+  buffer_desc[buffer_count].DataOffset = 0;
+  buffer_desc[buffer_count].DataSize = sizeof (DXVA_PictureParameters);
+  buffer_count++;
+
+  if (self->submit_iq_data) {
+    buffer_desc[buffer_count].BufferType =
+        D3D11_VIDEO_DECODER_BUFFER_INVERSE_QUANTIZATION_MATRIX;
+    buffer_desc[buffer_count].DataOffset = 0;
+    buffer_desc[buffer_count].DataSize = sizeof (DXVA_QmatrixData);
+    buffer_count++;
+  }
+
+  buffer_desc[buffer_count].BufferType =
+      D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
+  buffer_desc[buffer_count].DataOffset = 0;
+  buffer_desc[buffer_count].DataSize =
+      sizeof (DXVA_SliceInfo) * self->slice_list->len;
+  buffer_count++;
+
+  buffer_desc[buffer_count].BufferType = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
+  buffer_desc[buffer_count].DataOffset = 0;
+  buffer_desc[buffer_count].DataSize = self->written_buffer_size;
+  buffer_count++;
+
+  ret = gst_d3d11_decoder_submit_decoder_buffers (self->d3d11_decoder,
+      buffer_count, buffer_desc);
+
+  self->written_buffer_size = 0;
+  self->bitstream_buffer_data = NULL;
+  self->remaining_buffer_size = 0;
+  g_array_set_size (self->slice_list, 0);
+
+  return ret;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_decode_slice (GstMpeg2Decoder * decoder,
+    GstMpeg2Picture * picture, GstMpeg2Slice * slice)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  GstMpegVideoSliceHdr *header = &slice->header;
+  GstMpegVideoPacket *packet = &slice->packet;
+  /* including start code 4 bytes */
+  guint to_write = packet->size + 4;
+  DXVA_SliceInfo slice_info = { 0, };
+
+  g_assert (packet->offset >= 4);
+
+  /* FIXME: DXVA wants to know the number of MBs per slice
+   * (not sure whether it's actually used by driver). But in case that
+   * one slice is splitted into two bitstream buffer, it's almost impossible
+   * to know the number of MBs per splitted bitstream buffer.
+   * So, we will not support too large bitstream buffer which requires multiple
+   * hardware bitstream buffer at this moment.
+   */
+  if (self->remaining_buffer_size < to_write) {
+    /* Submit slice data we have so that release acquired bitstream buffers */
+    if (self->bitstream_buffer_data)
+      gst_d3d11_mpeg2_dec_submit_slice_data (self, picture);
+    self->bitstream_buffer_data = 0;
+
+    GST_ERROR_OBJECT (self, "Slice data is too large");
+
+    return FALSE;
+  }
+
+  slice_info.wHorizontalPosition = header->mb_column;
+  slice_info.wVerticalPosition = header->mb_row;
+  slice_info.dwSliceBitsInBuffer = 8 * to_write;
+  slice_info.dwSliceDataLocation = self->written_buffer_size;
+  /* XXX: We don't have information about the number of MBs in this slice.
+   * Just store offset here, and actual number will be calculated later */
+  slice_info.wNumberMBsInSlice =
+      (header->mb_row * self->width_in_mb) + header->mb_column;
+  slice_info.wQuantizerScaleCode = header->quantiser_scale_code;
+  slice_info.wMBbitOffset = header->header_size + 32;
+  memcpy (self->bitstream_buffer_data, packet->data + packet->offset - 4,
+      to_write);
+
+  g_array_append_val (self->slice_list, slice_info);
+  self->remaining_buffer_size -= to_write;
+  self->written_buffer_size += to_write;
+  self->bitstream_buffer_data += to_write;
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_d3d11_mpeg2_dec_output_picture (GstMpeg2Decoder * decoder,
+    GstVideoCodecFrame * frame, GstMpeg2Picture * picture)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+  GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
+  GstBuffer *output_buffer = NULL;
+  GstBuffer *view_buffer;
+
+  GST_LOG_OBJECT (self, "Outputting picture %p", picture);
+
+  view_buffer = (GstBuffer *) gst_mpeg2_picture_get_user_data (picture);
+
+  if (!view_buffer) {
+    GST_ERROR_OBJECT (self, "Could not get output view");
+    goto error;
+  }
+
+  /* if downstream is d3d11 element and forward playback case,
+   * expose our decoder view without copy. In case of reverse playback, however,
+   * we cannot do that since baseclass will store the decoded buffer
+   * up to gop size but our dpb pool cannot be increased */
+  if (self->use_d3d11_output &&
+      gst_d3d11_decoder_supports_direct_rendering (self->d3d11_decoder) &&
+      vdec->input_segment.rate > 0) {
+    GstMemory *mem;
+
+    output_buffer = gst_buffer_ref (view_buffer);
+    mem = gst_buffer_peek_memory (output_buffer, 0);
+    GST_MINI_OBJECT_FLAG_SET (mem, GST_D3D11_MEMORY_TRANSFER_NEED_DOWNLOAD);
+  } else {
+    output_buffer = gst_video_decoder_allocate_output_buffer (vdec);
+  }
+
+  if (!output_buffer) {
+    GST_ERROR_OBJECT (self, "Couldn't allocate output buffer");
+    goto error;
+  }
+
+  frame->output_buffer = output_buffer;
+
+  if (!gst_d3d11_decoder_process_output (self->d3d11_decoder,
+          &self->output_state->info,
+          GST_VIDEO_INFO_WIDTH (&self->output_state->info),
+          GST_VIDEO_INFO_HEIGHT (&self->output_state->info),
+          view_buffer, output_buffer)) {
+    GST_ERROR_OBJECT (self, "Failed to copy buffer");
+    goto error;
+  }
+
+  if (picture->buffer_flags != 0) {
+    gboolean interlaced =
+        (picture->buffer_flags & GST_VIDEO_BUFFER_FLAG_INTERLACED) != 0;
+    gboolean tff = (picture->buffer_flags & GST_VIDEO_BUFFER_FLAG_TFF) != 0;
+
+    GST_TRACE_OBJECT (self,
+        "apply buffer flags 0x%x (interlaced %d, top-field-first %d)",
+        picture->buffer_flags, interlaced, tff);
+    GST_BUFFER_FLAG_SET (frame->output_buffer, picture->buffer_flags);
+  }
+
+  gst_mpeg2_picture_unref (picture);
+
+  return gst_video_decoder_finish_frame (vdec, frame);
+
+error:
+  gst_video_decoder_drop_frame (vdec, frame);
+  gst_mpeg2_picture_unref (picture);
+
+  return GST_FLOW_ERROR;
+}
+
+static gboolean
+gst_d3d11_mpeg2_dec_end_picture (GstMpeg2Decoder * decoder,
+    GstMpeg2Picture * picture)
+{
+  GstD3D11Mpeg2Dec *self = GST_D3D11_MPEG2_DEC (decoder);
+
+  if (!gst_d3d11_mpeg2_dec_submit_slice_data (self, picture)) {
+    GST_ERROR_OBJECT (self, "Failed to submit slice data");
+    return FALSE;
+  }
+
+  if (!gst_d3d11_decoder_end_frame (self->d3d11_decoder)) {
+    GST_ERROR_OBJECT (self, "Failed to EndFrame");
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+typedef struct
+{
+  guint width;
+  guint height;
+} GstD3D11Mpeg2DecResolution;
+
+void
+gst_d3d11_mpeg2_dec_register (GstPlugin * plugin, GstD3D11Device * device,
+    GstD3D11Decoder * decoder, guint rank)
+{
+  GType type;
+  gchar *type_name;
+  gchar *feature_name;
+  guint index = 0;
+  GUID profile;
+  GTypeInfo type_info = {
+    sizeof (GstD3D11Mpeg2DecClass),
+    NULL,
+    NULL,
+    (GClassInitFunc) gst_d3d11_mpeg2_dec_class_init,
+    NULL,
+    NULL,
+    sizeof (GstD3D11Mpeg2Dec),
+    0,
+    (GInstanceInitFunc) gst_d3d11_mpeg2_dec_init,
+  };
+  static const GUID *supported_profiles[] = {
+    &GST_GUID_D3D11_DECODER_PROFILE_MPEG2_VLD,
+    &GST_GUID_D3D11_DECODER_PROFILE_MPEG2and1_VLD
+  };
+  GstCaps *sink_caps = NULL;
+  GstCaps *src_caps = NULL;
+
+  if (!gst_d3d11_decoder_get_supported_decoder_profile (decoder,
+          supported_profiles, G_N_ELEMENTS (supported_profiles), &profile)) {
+    GST_INFO_OBJECT (device, "device does not support MPEG-2 video decoding");
+    return;
+  }
+
+  sink_caps = gst_caps_from_string ("video/mpeg, "
+      "mpegversion = (int)2, systemstream = (boolean) false, "
+      "profile = (string) { main, simple }");
+  src_caps = gst_caps_from_string ("video/x-raw("
+      GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY "); video/x-raw");
+
+  /* NOTE: We are supporting only 4:2:0, main or simple profiles */
+  gst_caps_set_simple (src_caps, "format", G_TYPE_STRING, "NV12", NULL);
+
+  gst_caps_set_simple (sink_caps,
+      "width", GST_TYPE_INT_RANGE, 64, 1920,
+      "height", GST_TYPE_INT_RANGE, 64, 1920, NULL);
+  gst_caps_set_simple (src_caps,
+      "width", GST_TYPE_INT_RANGE, 64, 1920,
+      "height", GST_TYPE_INT_RANGE, 64, 1920, NULL);
+
+  type_info.class_data =
+      gst_d3d11_decoder_class_data_new (device, sink_caps, src_caps);
+
+  type_name = g_strdup ("GstD3D11Mpeg2Dec");
+  feature_name = g_strdup ("d3d11mpeg2dec");
+
+  while (g_type_from_name (type_name)) {
+    index++;
+    g_free (type_name);
+    g_free (feature_name);
+    type_name = g_strdup_printf ("GstD3D11Mpeg2Device%dDec", index);
+    feature_name = g_strdup_printf ("d3d11mpeg2device%ddec", index);
+  }
+
+  type = g_type_register_static (GST_TYPE_MPEG2_DECODER,
+      type_name, &type_info, 0);
+
+  /* make lower rank than default device */
+  if (rank > 0 && index != 0)
+    rank--;
+
+  if (!gst_element_register (plugin, feature_name, rank, type))
+    GST_WARNING ("Failed to register plugin '%s'", type_name);
+
+  g_free (type_name);
+  g_free (feature_name);
+}
diff --git a/sys/d3d11/gstd3d11mpeg2dec.h b/sys/d3d11/gstd3d11mpeg2dec.h
new file mode 100644
index 000000000..2c2ce5441
--- /dev/null
+++ b/sys/d3d11/gstd3d11mpeg2dec.h
@@ -0,0 +1,34 @@
+/* GStreamer
+ * Copyright (C) 2021 Seungha Yang <seungha@centricular.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_D3D11_MPEG2_DEC_H__
+#define __GST_D3D11_MPEG2_DEC_H__
+
+#include "gstd3d11decoder.h"
+
+G_BEGIN_DECLS
+
+void  gst_d3d11_mpeg2_dec_register (GstPlugin * plugin,
+                                    GstD3D11Device * device,
+                                    GstD3D11Decoder * decoder,
+                                    guint rank);
+
+G_END_DECLS
+
+#endif /* __GST_D3D11_MPEG2_DEC_H__ */
diff --git a/sys/d3d11/meson.build b/sys/d3d11/meson.build
index 4a987da52..c6bbbc736 100644
--- a/sys/d3d11/meson.build
+++ b/sys/d3d11/meson.build
@@ -21,6 +21,7 @@ d3d11_dec_sources = [
   'gstd3d11h264dec.c',
   'gstd3d11vp9dec.c',
   'gstd3d11h265dec.c',
+  'gstd3d11mpeg2dec.c',
   'gstd3d11vp8dec.c',
 ]
 
diff --git a/sys/d3d11/plugin.c b/sys/d3d11/plugin.c
index 03b44978c..dee560b72 100644
--- a/sys/d3d11/plugin.c
+++ b/sys/d3d11/plugin.c
@@ -36,6 +36,7 @@
 #include "gstd3d11h265dec.h"
 #include "gstd3d11vp9dec.h"
 #include "gstd3d11vp8dec.h"
+#include "gstd3d11mpeg2dec.h"
 #endif
 #ifdef HAVE_DXGI_DESKTOP_DUP
 #include "gstd3d11desktopdupsrc.h"
@@ -57,6 +58,7 @@ GST_DEBUG_CATEGORY (gst_d3d11_h264_dec_debug);
 GST_DEBUG_CATEGORY (gst_d3d11_h265_dec_debug);
 GST_DEBUG_CATEGORY (gst_d3d11_vp9_dec_debug);
 GST_DEBUG_CATEGORY (gst_d3d11_vp8_dec_debug);
+GST_DEBUG_CATEGORY (gst_d3d11_mpeg2_dec_debug);
 #endif
 
 #ifdef HAVE_DXGI_DESKTOP_DUP
@@ -109,6 +111,8 @@ plugin_init (GstPlugin * plugin)
         "d3d11h265dec", 0, "Direct3D11 H.265 Video Decoder");
     GST_DEBUG_CATEGORY_INIT (gst_d3d11_vp8_dec_debug,
         "d3d11vp8dec", 0, "Direct3D11 VP8 Decoder");
+    GST_DEBUG_CATEGORY_INIT (gst_d3d11_mpeg2_dec_debug,
+        "d3d11mpeg2dec", 0, "Direct3D11 MPEG2 Decoder");
   }
 #endif
 
@@ -156,6 +160,8 @@ plugin_init (GstPlugin * plugin)
             GST_RANK_SECONDARY);
         gst_d3d11_vp8_dec_register (plugin, device, decoder,
             GST_RANK_SECONDARY);
+        gst_d3d11_mpeg2_dec_register (plugin, device, decoder,
+            GST_RANK_SECONDARY);
       }
 
     done: