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gstreamer/sys/d3d11/gstd3d11h264dec.c
Seungha Yang bc99ea1e30 d3d11decoder: Disable zero-copy for blacklisted device 
Should enable it for verified devices. For now, Xbox is blacklisted

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1339>
2020-06-16 10:49:02 +00:00

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/* GStreamer
* Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.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.
*
* NOTE: some of implementations are copied/modified from Chromium code
*
* Copyright 2015 The Chromium Authors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstd3d11h264dec.h"
#include "gstd3d11memory.h"
#include "gstd3d11bufferpool.h"
#include <gst/codecs/gsth264decoder.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_h264_dec_debug);
#define GST_CAT_DEFAULT gst_d3d11_h264_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_H264_IDCT_FGT, 0x1b81be67, 0xa0c7,
0x11d3, 0xb9, 0x84, 0x00, 0xc0, 0x4f, 0x2e, 0x73, 0xc5);
DEFINE_GUID (GST_GUID_D3D11_DECODER_PROFILE_H264_VLD_NOFGT, 0x1b81be68, 0xa0c7,
0x11d3, 0xb9, 0x84, 0x00, 0xc0, 0x4f, 0x2e, 0x73, 0xc5);
DEFINE_GUID (GST_GUID_D3D11_DECODER_PROFILE_H264_VLD_FGT, 0x1b81be69, 0xa0c7,
0x11d3, 0xb9, 0x84, 0x00, 0xc0, 0x4f, 0x2e, 0x73, 0xc5);
typedef struct _GstD3D11H264Dec
{
GstH264Decoder parent;
GstVideoCodecState *output_state;
GstD3D11Device *device;
guint width, height;
guint coded_width, coded_height;
guint bitdepth;
guint chroma_format_idc;
GstVideoFormat out_format;
/* Array of DXVA_Slice_H264_Short */
GArray *slice_list;
GstD3D11Decoder *d3d11_decoder;
/* Pointing current bitstream buffer */
gboolean bad_aligned_bitstream_buffer;
guint written_buffer_size;
guint remaining_buffer_size;
guint8 *bitstream_buffer_data;
gboolean use_d3d11_output;
DXVA_PicEntry_H264 ref_frame_list[16];
INT field_order_cnt_list[16][2];
USHORT frame_num_list[16];
UINT used_for_reference_flags;
USHORT non_existing_frame_flags;
} GstD3D11H264Dec;
typedef struct _GstD3D11H264DecClass
{
GstH264DecoderClass parent_class;
guint adapter;
guint device_id;
guint vendor_id;
} GstD3D11H264DecClass;
static GstElementClass *parent_class = NULL;
#define GST_D3D11_H264_DEC(object) ((GstD3D11H264Dec *) (object))
#define GST_D3D11_H264_DEC_GET_CLASS(object) \
(G_TYPE_INSTANCE_GET_CLASS ((object),G_TYPE_FROM_INSTANCE (object),GstD3D11H264DecClass))
static void gst_d3d11_h264_dec_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_d3d11_h264_dec_dispose (GObject * object);
static void gst_d3d11_h264_dec_set_context (GstElement * element,
GstContext * context);
static gboolean gst_d3d11_h264_dec_open (GstVideoDecoder * decoder);
static gboolean gst_d3d11_h264_dec_close (GstVideoDecoder * decoder);
static gboolean gst_d3d11_h264_dec_negotiate (GstVideoDecoder * decoder);
static gboolean gst_d3d11_h264_dec_decide_allocation (GstVideoDecoder *
decoder, GstQuery * query);
static gboolean gst_d3d11_h264_dec_src_query (GstVideoDecoder * decoder,
GstQuery * query);
/* GstH264Decoder */
static gboolean gst_d3d11_h264_dec_new_sequence (GstH264Decoder * decoder,
const GstH264SPS * sps, gint max_dpb_size);
static gboolean gst_d3d11_h264_dec_new_picture (GstH264Decoder * decoder,
GstH264Picture * picture);
static GstFlowReturn gst_d3d11_h264_dec_output_picture (GstH264Decoder *
decoder, GstH264Picture * picture);
static gboolean gst_d3d11_h264_dec_start_picture (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb);
static gboolean gst_d3d11_h264_dec_decode_slice (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GArray * ref_pic_list0,
GArray * ref_pic_list1);
static gboolean gst_d3d11_h264_dec_end_picture (GstH264Decoder * decoder,
GstH264Picture * picture);
static void
gst_d3d11_h264_dec_class_init (GstD3D11H264DecClass * 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);
GstH264DecoderClass *h264decoder_class = GST_H264_DECODER_CLASS (klass);
GstD3D11DecoderClassData *cdata = (GstD3D11DecoderClassData *) data;
gchar *long_name;
gobject_class->get_property = gst_d3d11_h264_dec_get_property;
gobject_class->dispose = gst_d3d11_h264_dec_dispose;
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_h264_dec_set_context);
long_name = g_strdup_printf ("Direct3D11 H.264 %s Decoder",
cdata->description);
gst_element_class_set_metadata (element_class, long_name,
"Codec/Decoder/Video/Hardware",
"A Direct3D11 based H.264 video decoder",
"Seungha Yang <seungha.yang@navercorp.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_h264_dec_open);
decoder_class->close = GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_close);
decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_negotiate);
decoder_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_decide_allocation);
decoder_class->src_query = GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_src_query);
h264decoder_class->new_sequence =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_new_sequence);
h264decoder_class->new_picture =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_new_picture);
h264decoder_class->output_picture =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_output_picture);
h264decoder_class->start_picture =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_start_picture);
h264decoder_class->decode_slice =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_decode_slice);
h264decoder_class->end_picture =
GST_DEBUG_FUNCPTR (gst_d3d11_h264_dec_end_picture);
}
static void
gst_d3d11_h264_dec_init (GstD3D11H264Dec * self)
{
self->slice_list = g_array_new (FALSE, TRUE, sizeof (DXVA_Slice_H264_Short));
}
static void
gst_d3d11_h264_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstD3D11H264DecClass *klass = GST_D3D11_H264_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_h264_dec_dispose (GObject * object)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (object);
if (self->slice_list) {
g_array_unref (self->slice_list);
self->slice_list = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_d3d11_h264_dec_set_context (GstElement * element, GstContext * context)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (element);
GstD3D11H264DecClass *klass = GST_D3D11_H264_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_h264_dec_open (GstVideoDecoder * decoder)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GstD3D11H264DecClass *klass = GST_D3D11_H264_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_h264_dec_close (GstVideoDecoder * decoder)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
self->output_state = NULL;
gst_clear_object (&self->d3d11_decoder);
gst_clear_object (&self->device);
return TRUE;
}
static gboolean
gst_d3d11_h264_dec_negotiate (GstVideoDecoder * decoder)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GstH264Decoder *h264dec = GST_H264_DECODER (decoder);
if (!gst_d3d11_decoder_negotiate (decoder, h264dec->input_state,
self->out_format, self->width, self->height, &self->output_state,
&self->use_d3d11_output))
return FALSE;
return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
}
static gboolean
gst_d3d11_h264_dec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
if (!gst_d3d11_decoder_decide_allocation (decoder, query, self->device,
GST_D3D11_CODEC_H264, self->use_d3d11_output))
return FALSE;
return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation
(decoder, query);
}
static gboolean
gst_d3d11_h264_dec_src_query (GstVideoDecoder * decoder, GstQuery * query)
{
GstD3D11H264Dec *self = GST_D3D11_H264_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_h264_dec_new_sequence (GstH264Decoder * decoder,
const GstH264SPS * sps, gint max_dpb_size)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
gint crop_width, crop_height;
gboolean modified = FALSE;
static const GUID *supported_profiles[] = {
&GST_GUID_D3D11_DECODER_PROFILE_H264_IDCT_FGT,
&GST_GUID_D3D11_DECODER_PROFILE_H264_VLD_NOFGT,
&GST_GUID_D3D11_DECODER_PROFILE_H264_VLD_FGT
};
GST_LOG_OBJECT (self, "new sequence");
if (sps->frame_cropping_flag) {
crop_width = sps->crop_rect_width;
crop_height = sps->crop_rect_height;
} else {
crop_width = sps->width;
crop_height = sps->height;
}
if (self->width != crop_width || self->height != crop_height ||
self->coded_width != sps->width || self->coded_height != sps->height) {
GST_INFO_OBJECT (self, "resolution changed %dx%d (%dx%d)",
crop_width, crop_height, sps->width, sps->height);
self->width = crop_width;
self->height = crop_height;
self->coded_width = sps->width;
self->coded_height = sps->height;
modified = TRUE;
}
if (self->bitdepth != sps->bit_depth_luma_minus8 + 8) {
GST_INFO_OBJECT (self, "bitdepth changed");
self->bitdepth = sps->bit_depth_luma_minus8 + 8;
modified = TRUE;
}
if (self->chroma_format_idc != sps->chroma_format_idc) {
GST_INFO_OBJECT (self, "chroma format changed");
self->chroma_format_idc = sps->chroma_format_idc;
modified = TRUE;
}
if (modified || !self->d3d11_decoder->opened) {
GstVideoInfo info;
self->out_format = GST_VIDEO_FORMAT_UNKNOWN;
if (self->bitdepth == 8) {
if (self->chroma_format_idc == 1)
self->out_format = GST_VIDEO_FORMAT_NV12;
else {
GST_FIXME_OBJECT (self, "Could not support 8bits non-4:2:0 format");
}
} else if (self->bitdepth == 10) {
if (self->chroma_format_idc == 1)
self->out_format = GST_VIDEO_FORMAT_P010_10LE;
else {
GST_FIXME_OBJECT (self, "Could not support 10bits non-4:2:0 format");
}
}
if (self->out_format == GST_VIDEO_FORMAT_UNKNOWN) {
GST_ERROR_OBJECT (self, "Could not support bitdepth/chroma format");
return FALSE;
}
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_H264,
&info, self->coded_width, self->coded_height,
/* Additional 4 views margin for zero-copy rendering */
max_dpb_size + 4,
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_h264_dec_get_bitstream_buffer (GstD3D11H264Dec * self)
{
GST_TRACE_OBJECT (self, "Getting bitstream buffer");
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;
if ((self->remaining_buffer_size & 127) != 0) {
GST_WARNING_OBJECT (self,
"The size of bitstream buffer is not 128 bytes aligned");
self->bad_aligned_bitstream_buffer = TRUE;
} else {
self->bad_aligned_bitstream_buffer = FALSE;
}
return TRUE;
}
static GstD3D11DecoderOutputView *
gst_d3d11_h264_dec_get_output_view_from_picture (GstD3D11H264Dec * self,
GstH264Picture * picture)
{
GstBuffer *view_buffer;
GstD3D11DecoderOutputView *view;
view_buffer = (GstBuffer *) gst_h264_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 gboolean
gst_d3d11_h264_dec_start_picture (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GstD3D11DecoderOutputView *view;
gint i;
GArray *dpb_array;
view = gst_d3d11_h264_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;
}
for (i = 0; i < 16; i++) {
self->ref_frame_list[i].bPicEntry = 0xFF;
self->field_order_cnt_list[i][0] = 0;
self->field_order_cnt_list[i][1] = 0;
self->frame_num_list[i] = 0;
}
self->used_for_reference_flags = 0;
self->non_existing_frame_flags = 0;
dpb_array = gst_h264_dpb_get_pictures_all (dpb);
for (i = 0; i < dpb_array->len; i++) {
guint ref = 3;
GstH264Picture *other = g_array_index (dpb_array, GstH264Picture *, i);
GstD3D11DecoderOutputView *other_view;
gint id = 0xff;
if (!other->ref)
continue;
other_view = gst_d3d11_h264_dec_get_output_view_from_picture (self, other);
if (other_view)
id = other_view->view_id;
self->ref_frame_list[i].Index7Bits = id;
self->ref_frame_list[i].AssociatedFlag = other->long_term;
self->field_order_cnt_list[i][0] = other->top_field_order_cnt;
self->field_order_cnt_list[i][1] = other->bottom_field_order_cnt;
self->frame_num_list[i] = self->ref_frame_list[i].AssociatedFlag
? other->long_term_pic_num : other->frame_num;
self->used_for_reference_flags |= ref << (2 * i);
self->non_existing_frame_flags |= (other->nonexisting) << i;
}
g_array_unref (dpb_array);
g_array_set_size (self->slice_list, 0);
return gst_d3d11_h264_dec_get_bitstream_buffer (self);
}
static gboolean
gst_d3d11_h264_dec_new_picture (GstH264Decoder * decoder,
GstH264Picture * picture)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GstBuffer *view_buffer;
GstD3D11Memory *mem;
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;
}
mem = (GstD3D11Memory *) gst_buffer_peek_memory (view_buffer, 0);
GST_LOG_OBJECT (self, "New output view buffer %" GST_PTR_FORMAT " (index %d)",
view_buffer, mem->subresource_index);
gst_h264_picture_set_user_data (picture,
view_buffer, (GDestroyNotify) gst_buffer_unref);
GST_LOG_OBJECT (self, "New h264picture %p", picture);
return TRUE;
}
static GstFlowReturn
gst_d3d11_h264_dec_output_picture (GstH264Decoder * decoder,
GstH264Picture * picture)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GstVideoCodecFrame *frame = NULL;
GstBuffer *output_buffer = NULL;
GstFlowReturn ret;
GstBuffer *view_buffer;
GST_LOG_OBJECT (self,
"Outputting picture %p (poc %d)", picture, picture->pic_order_cnt);
view_buffer = (GstBuffer *) gst_h264_picture_get_user_data (picture);
if (!view_buffer) {
GST_ERROR_OBJECT (self, "Could not get output view");
return GST_FLOW_ERROR;
}
frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (self),
picture->system_frame_number);
/* 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) &&
GST_VIDEO_DECODER (self)->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 (GST_VIDEO_DECODER (self));
}
if (!output_buffer) {
GST_ERROR_OBJECT (self, "Couldn't allocate output buffer");
return GST_FLOW_ERROR;
}
if (!frame) {
GST_WARNING_OBJECT (self,
"Failed to find codec frame for picture %p", picture);
GST_BUFFER_PTS (output_buffer) = picture->pts;
GST_BUFFER_DTS (output_buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (output_buffer) = GST_CLOCK_TIME_NONE;
} else {
frame->output_buffer = output_buffer;
GST_BUFFER_PTS (output_buffer) = GST_BUFFER_PTS (frame->input_buffer);
GST_BUFFER_DTS (output_buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (output_buffer) =
GST_BUFFER_DURATION (frame->input_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");
if (frame)
gst_video_decoder_drop_frame (GST_VIDEO_DECODER (self), frame);
else
gst_buffer_unref (output_buffer);
return GST_FLOW_ERROR;
}
GST_LOG_OBJECT (self, "Finish frame %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_PTS (output_buffer)));
if (frame) {
ret = gst_video_decoder_finish_frame (GST_VIDEO_DECODER (self), frame);
} else {
ret = gst_pad_push (GST_VIDEO_DECODER_SRC_PAD (self), output_buffer);
}
return ret;
}
static gboolean
gst_d3d11_h264_dec_submit_slice_data (GstD3D11H264Dec * self)
{
guint buffer_size;
gpointer buffer;
guint8 *data;
gsize offset = 0;
gint i;
D3D11_VIDEO_DECODER_BUFFER_DESC buffer_desc[4] = { 0, };
gboolean ret;
DXVA_Slice_H264_Short *slice_data;
if (self->slice_list->len < 1) {
GST_WARNING_OBJECT (self, "Nothing to submit");
return FALSE;
}
slice_data = &g_array_index (self->slice_list, DXVA_Slice_H264_Short,
self->slice_list->len - 1);
/* DXVA2 spec is saying that written bitstream data must be 128 bytes
* aligned if the bitstream buffer contains end of slice
* (i.e., wBadSliceChopping == 0 or 2) */
if (slice_data->wBadSliceChopping == 0 || slice_data->wBadSliceChopping == 2) {
guint padding =
MIN (GST_ROUND_UP_128 (self->written_buffer_size) -
self->written_buffer_size, self->remaining_buffer_size);
if (padding) {
GST_TRACE_OBJECT (self,
"Written bitstream buffer size %u is not 128 bytes aligned, "
"add padding %u bytes", self->written_buffer_size, padding);
memset (self->bitstream_buffer_data, 0, padding);
self->written_buffer_size += padding;
slice_data->SliceBytesInBuffer += padding;
}
}
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++) {
DXVA_Slice_H264_Short *slice_data =
&g_array_index (self->slice_list, DXVA_Slice_H264_Short, i);
memcpy (data + offset, slice_data, sizeof (DXVA_Slice_H264_Short));
offset += sizeof (DXVA_Slice_H264_Short);
}
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[0].BufferType = D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS;
buffer_desc[0].DataOffset = 0;
buffer_desc[0].DataSize = sizeof (DXVA_PicParams_H264);
buffer_desc[1].BufferType =
D3D11_VIDEO_DECODER_BUFFER_INVERSE_QUANTIZATION_MATRIX;
buffer_desc[1].DataOffset = 0;
buffer_desc[1].DataSize = sizeof (DXVA_Qmatrix_H264);
buffer_desc[2].BufferType = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
buffer_desc[2].DataOffset = 0;
buffer_desc[2].DataSize =
sizeof (DXVA_Slice_H264_Short) * self->slice_list->len;
if (!self->bad_aligned_bitstream_buffer
&& (self->written_buffer_size & 127) != 0) {
GST_WARNING_OBJECT (self,
"Written bitstream buffer size %u is not 128 bytes aligned",
self->written_buffer_size);
}
buffer_desc[3].BufferType = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
buffer_desc[3].DataOffset = 0;
buffer_desc[3].DataSize = self->written_buffer_size;
ret = gst_d3d11_decoder_submit_decoder_buffers (self->d3d11_decoder,
4, 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_h264_dec_end_picture (GstH264Decoder * decoder,
GstH264Picture * picture)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GST_LOG_OBJECT (self, "end picture %p, (poc %d)",
picture, picture->pic_order_cnt);
if (!gst_d3d11_h264_dec_submit_slice_data (self)) {
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;
}
static void
gst_d3d11_h264_dec_picture_params_from_sps (GstD3D11H264Dec * self,
const GstH264SPS * sps, gboolean field_pic, DXVA_PicParams_H264 * params)
{
#define COPY_FIELD(f) \
(params)->f = (sps)->f
params->wFrameWidthInMbsMinus1 = sps->pic_width_in_mbs_minus1;
params->wFrameHeightInMbsMinus1 = sps->pic_height_in_map_units_minus1;
params->residual_colour_transform_flag = sps->separate_colour_plane_flag;
params->MbaffFrameFlag = sps->mb_adaptive_frame_field_flag && field_pic;
params->field_pic_flag = field_pic;
params->MinLumaBipredSize8x8Flag = sps->level_idc >= 31;
COPY_FIELD (num_ref_frames);
COPY_FIELD (chroma_format_idc);
COPY_FIELD (frame_mbs_only_flag);
COPY_FIELD (bit_depth_luma_minus8);
COPY_FIELD (bit_depth_chroma_minus8);
COPY_FIELD (log2_max_frame_num_minus4);
COPY_FIELD (pic_order_cnt_type);
COPY_FIELD (log2_max_pic_order_cnt_lsb_minus4);
COPY_FIELD (delta_pic_order_always_zero_flag);
COPY_FIELD (direct_8x8_inference_flag);
#undef COPY_FIELD
}
static void
gst_d3d11_h264_dec_picture_params_from_pps (GstD3D11H264Dec * self,
const GstH264PPS * pps, DXVA_PicParams_H264 * params)
{
#define COPY_FIELD(f) \
(params)->f = (pps)->f
COPY_FIELD (constrained_intra_pred_flag);
COPY_FIELD (weighted_pred_flag);
COPY_FIELD (weighted_bipred_idc);
COPY_FIELD (transform_8x8_mode_flag);
COPY_FIELD (pic_init_qs_minus26);
COPY_FIELD (chroma_qp_index_offset);
COPY_FIELD (second_chroma_qp_index_offset);
COPY_FIELD (pic_init_qp_minus26);
COPY_FIELD (num_ref_idx_l0_active_minus1);
COPY_FIELD (num_ref_idx_l1_active_minus1);
COPY_FIELD (entropy_coding_mode_flag);
COPY_FIELD (pic_order_present_flag);
COPY_FIELD (deblocking_filter_control_present_flag);
COPY_FIELD (redundant_pic_cnt_present_flag);
COPY_FIELD (num_slice_groups_minus1);
COPY_FIELD (slice_group_map_type);
#undef COPY_FIELD
}
static void
gst_d3d11_h264_dec_picture_params_from_slice_header (GstD3D11H264Dec *
self, const GstH264SliceHdr * slice_header, DXVA_PicParams_H264 * params)
{
params->sp_for_switch_flag = slice_header->sp_for_switch_flag;
params->field_pic_flag = slice_header->field_pic_flag;
params->CurrPic.AssociatedFlag = slice_header->bottom_field_flag;
params->IntraPicFlag =
GST_H264_IS_I_SLICE (slice_header) || GST_H264_IS_SI_SLICE (slice_header);
}
static gboolean
gst_d3d11_h264_dec_fill_picture_params (GstD3D11H264Dec * self,
const GstH264SliceHdr * slice_header, DXVA_PicParams_H264 * params)
{
const GstH264SPS *sps;
const GstH264PPS *pps;
g_return_val_if_fail (slice_header->pps != NULL, FALSE);
g_return_val_if_fail (slice_header->pps->sequence != NULL, FALSE);
pps = slice_header->pps;
sps = pps->sequence;
memset (params, 0, sizeof (DXVA_PicParams_H264));
params->MbsConsecutiveFlag = 1;
params->Reserved16Bits = 3;
params->ContinuationFlag = 1;
params->Reserved8BitsA = 0;
params->Reserved8BitsB = 0;
params->StatusReportFeedbackNumber = 1;
gst_d3d11_h264_dec_picture_params_from_sps (self,
sps, slice_header->field_pic_flag, params);
gst_d3d11_h264_dec_picture_params_from_pps (self, pps, params);
gst_d3d11_h264_dec_picture_params_from_slice_header (self,
slice_header, params);
return TRUE;
}
static gboolean
gst_d3d11_h264_dec_decode_slice (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GArray * ref_pic_list0,
GArray * ref_pic_list1)
{
GstD3D11H264Dec *self = GST_D3D11_H264_DEC (decoder);
GstH264SPS *sps;
GstH264PPS *pps;
DXVA_PicParams_H264 pic_params = { 0, };
DXVA_Qmatrix_H264 iq_matrix = { 0, };
guint d3d11_buffer_size = 0;
gpointer d3d11_buffer = NULL;
gint i, j;
GstD3D11DecoderOutputView *view;
pps = slice->header.pps;
sps = pps->sequence;
view = gst_d3d11_h264_dec_get_output_view_from_picture (self, picture);
if (!view) {
GST_ERROR_OBJECT (self, "current picture does not have output view");
return FALSE;
}
gst_d3d11_h264_dec_fill_picture_params (self, &slice->header, &pic_params);
pic_params.CurrPic.Index7Bits = view->view_id;
pic_params.RefPicFlag = picture->ref;
pic_params.frame_num = picture->frame_num;
if (pic_params.field_pic_flag && pic_params.CurrPic.AssociatedFlag) {
pic_params.CurrFieldOrderCnt[1] = picture->bottom_field_order_cnt;
pic_params.CurrFieldOrderCnt[0] = 0;
} else if (pic_params.field_pic_flag && !pic_params.CurrPic.AssociatedFlag) {
pic_params.CurrFieldOrderCnt[0] = picture->top_field_order_cnt;
pic_params.CurrFieldOrderCnt[1] = 0;
} else {
pic_params.CurrFieldOrderCnt[0] = picture->top_field_order_cnt;
pic_params.CurrFieldOrderCnt[1] = picture->bottom_field_order_cnt;
}
memcpy (pic_params.RefFrameList, self->ref_frame_list,
sizeof (pic_params.RefFrameList));
memcpy (pic_params.FieldOrderCntList, self->field_order_cnt_list,
sizeof (pic_params.FieldOrderCntList));
memcpy (pic_params.FrameNumList, self->frame_num_list,
sizeof (pic_params.FrameNumList));
pic_params.UsedForReferenceFlags = self->used_for_reference_flags;
pic_params.NonExistingFrameFlags = self->non_existing_frame_flags;
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 (DXVA_PicParams_H264));
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;
}
if (pps->pic_scaling_matrix_present_flag) {
for (i = 0; i < 6; i++) {
for (j = 0; j < 16; j++) {
iq_matrix.bScalingLists4x4[i][j] = pps->scaling_lists_4x4[i][j];
}
}
for (i = 0; i < 2; i++) {
for (j = 0; j < 64; j++) {
iq_matrix.bScalingLists8x8[i][j] = pps->scaling_lists_8x8[i][j];
}
}
} else {
for (i = 0; i < 6; i++) {
for (j = 0; j < 16; j++) {
iq_matrix.bScalingLists4x4[i][j] = sps->scaling_lists_4x4[i][j];
}
}
for (i = 0; i < 2; i++) {
for (j = 0; j < 64; j++) {
iq_matrix.bScalingLists8x8[i][j] = sps->scaling_lists_8x8[i][j];
}
}
}
GST_TRACE_OBJECT (self, "Getting inverse quantization maxtirx 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_Qmatrix_H264));
GST_TRACE_OBJECT (self, "Release inverse quantization maxtirx 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;
}
{
guint to_write = slice->nalu.size + 3;
gboolean is_first = TRUE;
while (to_write > 0) {
guint bytes_to_copy;
gboolean is_last = TRUE;
DXVA_Slice_H264_Short slice_short = { 0, };
if (self->remaining_buffer_size < to_write && self->slice_list->len > 0) {
if (!gst_d3d11_h264_dec_submit_slice_data (self)) {
GST_ERROR_OBJECT (self, "Failed to submit bitstream buffers");
return FALSE;
}
if (!gst_d3d11_h264_dec_get_bitstream_buffer (self)) {
GST_ERROR_OBJECT (self, "Failed to get bitstream buffer");
return FALSE;
}
}
/* remaining_buffer_size: the size of remaining d3d11 decoder
* bitstream memory allowed to write more
* written_buffer_size: the size of written bytes to this d3d11 decoder
* bitstream memory
* bytes_to_copy: the size of which we would write to d3d11 decoder
* bitstream memory in this loop
*/
bytes_to_copy = to_write;
if (bytes_to_copy > self->remaining_buffer_size) {
/* if the size of this slice is larger than the size of remaining d3d11
* decoder bitstream memory, write the data up to the remaining d3d11
* decoder bitstream memory size and the rest would be written to the
* next d3d11 bitstream memory */
bytes_to_copy = self->remaining_buffer_size;
is_last = FALSE;
}
if (bytes_to_copy >= 3 && is_first) {
/* normal case */
self->bitstream_buffer_data[0] = 0;
self->bitstream_buffer_data[1] = 0;
self->bitstream_buffer_data[2] = 1;
memcpy (self->bitstream_buffer_data + 3,
slice->nalu.data + slice->nalu.offset, bytes_to_copy - 3);
} else {
/* when this nal unit date is splitted into two buffer */
memcpy (self->bitstream_buffer_data,
slice->nalu.data + slice->nalu.offset, bytes_to_copy);
}
/* For wBadSliceChopping value 0 or 1, BSNALunitDataLocation means
* the offset of the first start code of this slice in this d3d11
* memory buffer.
* 1) If this is the first slice of picture, it should be zero
* since we write start code at offset 0 (written size before this
* slice also must be zero).
* 2) If this is not the first slice of picture but this is the first
* d3d11 bitstream buffer (meaning that one bitstream buffer contains
* multiple slices), then this is the written size of buffer
* excluding this loop.
* And for wBadSliceChopping value 2 or 3, this should be zero by spec */
if (is_first)
slice_short.BSNALunitDataLocation = self->written_buffer_size;
else
slice_short.BSNALunitDataLocation = 0;
slice_short.SliceBytesInBuffer = bytes_to_copy;
/* wBadSliceChopping: (dxva h264 spec.)
* 0: All bits for the slice are located within the corresponding
* bitstream data buffer
* 1: The bitstream data buffer contains the start of the slice,
* but not the entire slice, because the buffer is full
* 2: The bitstream data buffer contains the end of the slice.
* It does not contain the start of the slice, because the start of
* the slice was located in the previous bitstream data buffer.
* 3: The bitstream data buffer does not contain the start of the slice
* (because the start of the slice was located in the previous
* bitstream data buffer), and it does not contain the end of the slice
* (because the current bitstream data buffer is also full).
*/
if (is_last && is_first) {
slice_short.wBadSliceChopping = 0;
} else if (!is_last && is_first) {
slice_short.wBadSliceChopping = 1;
} else if (is_last && !is_first) {
slice_short.wBadSliceChopping = 2;
} else {
slice_short.wBadSliceChopping = 3;
}
g_array_append_val (self->slice_list, slice_short);
self->remaining_buffer_size -= bytes_to_copy;
self->written_buffer_size += bytes_to_copy;
self->bitstream_buffer_data += bytes_to_copy;
is_first = FALSE;
to_write -= bytes_to_copy;
}
}
return TRUE;
}
typedef struct
{
guint width;
guint height;
} GstD3D11H264DecResolution;
void
gst_d3d11_h264_dec_register (GstPlugin * plugin, GstD3D11Device * device,
GstD3D11Decoder * decoder, guint rank, gboolean legacy)
{
GType type;
gchar *type_name;
gchar *feature_name;
guint index = 0;
guint i;
gboolean ret;
GUID profile;
GTypeInfo type_info = {
sizeof (GstD3D11H264DecClass),
NULL,
NULL,
(GClassInitFunc) gst_d3d11_h264_dec_class_init,
NULL,
NULL,
sizeof (GstD3D11H264Dec),
0,
(GInstanceInitFunc) gst_d3d11_h264_dec_init,
};
static const GUID *supported_profiles[] = {
&GST_GUID_D3D11_DECODER_PROFILE_H264_IDCT_FGT,
&GST_GUID_D3D11_DECODER_PROFILE_H264_VLD_NOFGT,
&GST_GUID_D3D11_DECODER_PROFILE_H264_VLD_FGT
};
/* values were taken from chromium. See supported_profile_helper.cc */
GstD3D11H264DecResolution resolutions_to_check[] = {
{1920, 1088}, {2560, 1440}, {3840, 2160}, {4096, 2160},
{4096, 2304}
};
GstCaps *sink_caps = NULL;
GstCaps *src_caps = NULL;
guint max_width = 0;
guint max_height = 0;
guint resolution;
ret = gst_d3d11_decoder_get_supported_decoder_profile (decoder,
supported_profiles, G_N_ELEMENTS (supported_profiles), &profile);
if (!ret) {
GST_WARNING_OBJECT (device, "decoder profile unavailable");
return;
}
ret = gst_d3d11_decoder_supports_format (decoder, &profile, DXGI_FORMAT_NV12);
if (!ret) {
GST_FIXME_OBJECT (device, "device does not support NV12 format");
return;
}
/* we will not check the maximum resolution for legacy devices.
* it might cause crash */
if (legacy) {
max_width = resolutions_to_check[0].width;
max_height = resolutions_to_check[0].height;
} else {
for (i = 0; i < G_N_ELEMENTS (resolutions_to_check); i++) {
if (gst_d3d11_decoder_supports_resolution (decoder, &profile,
DXGI_FORMAT_NV12, resolutions_to_check[i].width,
resolutions_to_check[i].height)) {
max_width = resolutions_to_check[i].width;
max_height = resolutions_to_check[i].height;
GST_DEBUG_OBJECT (device,
"device support resolution %dx%d", max_width, max_height);
} else {
break;
}
}
}
if (max_width == 0 || max_height == 0) {
GST_WARNING_OBJECT (device, "Couldn't query supported resolution");
return;
}
sink_caps = gst_caps_from_string ("video/x-h264, "
"stream-format= (string) { avc, avc3, byte-stream }, "
"alignment= (string) au, "
"profile = (string) { high, main, constrained-baseline, baseline }, "
"framerate = " GST_VIDEO_FPS_RANGE);
src_caps = gst_caps_from_string ("video/x-raw("
GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY "), format = (string) NV12, "
"framerate = " GST_VIDEO_FPS_RANGE ";"
"video/x-raw, format = (string) NV12, "
"framerate = " GST_VIDEO_FPS_RANGE);
/* To cover both landscape and portrait, select max value */
resolution = MAX (max_width, max_height);
gst_caps_set_simple (sink_caps,
"width", GST_TYPE_INT_RANGE, 64, resolution,
"height", GST_TYPE_INT_RANGE, 64, resolution, NULL);
gst_caps_set_simple (src_caps,
"width", GST_TYPE_INT_RANGE, 64, resolution,
"height", GST_TYPE_INT_RANGE, 64, resolution, NULL);
type_info.class_data =
gst_d3d11_decoder_class_data_new (device, sink_caps, src_caps);
type_name = g_strdup ("GstD3D11H264Dec");
feature_name = g_strdup ("d3d11h264dec");
while (g_type_from_name (type_name)) {
index++;
g_free (type_name);
g_free (feature_name);
type_name = g_strdup_printf ("GstD3D11H264Device%dDec", index);
feature_name = g_strdup_printf ("d3d11h264device%ddec", index);
}
type = g_type_register_static (GST_TYPE_H264_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);
}
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