gstreamer/sys/vdpau/mpeg/gstvdpmpegdec.c
2010-10-03 15:55:22 +02:00

667 lines
19 KiB
C

/*
* GStreamer
* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-vdpaumpegdec
*
* FIXME:Describe vdpaumpegdec here.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v -m fakesrc ! vdpaumpegdec ! fakesink silent=TRUE
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gst/gst.h>
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
#include "mpegutil.h"
#include "gstvdpmpegdec.h"
GST_DEBUG_CATEGORY_STATIC (gst_vdp_mpeg_dec_debug);
#define GST_CAT_DEFAULT gst_vdp_mpeg_dec_debug
/* the capabilities of the inputs and outputs.
*
* describe the real formats here.
*/
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, mpegversion = (int) [ 1, 2 ], "
"systemstream = (boolean) false")
);
#define DEBUG_INIT(bla) \
GST_DEBUG_CATEGORY_INIT (gst_vdp_mpeg_dec_debug, "vdpaumpegdec", 0, \
"VDPAU mpeg decoder");
GST_BOILERPLATE_FULL (GstVdpMpegDec, gst_vdp_mpeg_dec,
GstVdpDecoder, GST_TYPE_VDP_DECODER, DEBUG_INIT);
static void gst_vdp_mpeg_dec_init_info (VdpPictureInfoMPEG1Or2 * vdp_info);
#define SYNC_CODE_SIZE 3
static VdpDecoderProfile
gst_vdp_mpeg_dec_get_profile (MPEGSeqExtHdr * hdr)
{
VdpDecoderProfile profile;
switch (hdr->profile) {
case 5:
profile = VDP_DECODER_PROFILE_MPEG2_SIMPLE;
break;
default:
profile = VDP_DECODER_PROFILE_MPEG2_MAIN;
break;
}
return profile;
}
static gboolean
gst_vdp_mpeg_dec_handle_picture_coding (GstVdpMpegDec * mpeg_dec,
GstBuffer * buffer, GstVideoFrame * frame)
{
MPEGPictureExt pic_ext;
VdpPictureInfoMPEG1Or2 *info;
gint fields;
info = &mpeg_dec->vdp_info;
if (!mpeg_util_parse_picture_coding_extension (&pic_ext, buffer))
return FALSE;
memcpy (&mpeg_dec->vdp_info.f_code, &pic_ext.f_code, 4);
info->intra_dc_precision = pic_ext.intra_dc_precision;
info->picture_structure = pic_ext.picture_structure;
info->top_field_first = pic_ext.top_field_first;
info->frame_pred_frame_dct = pic_ext.frame_pred_frame_dct;
info->concealment_motion_vectors = pic_ext.concealment_motion_vectors;
info->q_scale_type = pic_ext.q_scale_type;
info->intra_vlc_format = pic_ext.intra_vlc_format;
info->alternate_scan = pic_ext.alternate_scan;
fields = 2;
if (pic_ext.picture_structure == 3) {
if (mpeg_dec->stream_info.interlaced) {
if (pic_ext.progressive_frame == 0)
fields = 2;
if (pic_ext.progressive_frame == 0 && pic_ext.repeat_first_field == 0)
fields = 2;
if (pic_ext.progressive_frame == 1 && pic_ext.repeat_first_field == 1)
fields = 3;
} else {
if (pic_ext.repeat_first_field == 0)
fields = 2;
if (pic_ext.repeat_first_field == 1 && pic_ext.top_field_first == 0)
fields = 4;
if (pic_ext.repeat_first_field == 1 && pic_ext.top_field_first == 1)
fields = 6;
}
} else
fields = 1;
frame->n_fields = fields;
if (pic_ext.top_field_first)
GST_VIDEO_FRAME_FLAG_SET (frame, GST_VIDEO_FRAME_FLAG_TFF);
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_handle_picture (GstVdpMpegDec * mpeg_dec, GstBuffer * buffer)
{
MPEGPictureHdr pic_hdr;
if (!mpeg_util_parse_picture_hdr (&pic_hdr, buffer))
return FALSE;
mpeg_dec->vdp_info.picture_coding_type = pic_hdr.pic_type;
if (mpeg_dec->stream_info.version == 1) {
mpeg_dec->vdp_info.full_pel_forward_vector =
pic_hdr.full_pel_forward_vector;
mpeg_dec->vdp_info.full_pel_backward_vector =
pic_hdr.full_pel_backward_vector;
memcpy (&mpeg_dec->vdp_info.f_code, &pic_hdr.f_code, 4);
}
mpeg_dec->frame_nr = mpeg_dec->gop_frame + pic_hdr.tsn;
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_handle_gop (GstVdpMpegDec * mpeg_dec, GstBuffer * buffer)
{
MPEGGop gop;
GstClockTime time;
if (!mpeg_util_parse_gop (&gop, buffer))
return FALSE;
time = GST_SECOND * (gop.hour * 3600 + gop.minute * 60 + gop.second);
GST_DEBUG ("gop timestamp: %" GST_TIME_FORMAT, GST_TIME_ARGS (time));
mpeg_dec->gop_frame =
gst_util_uint64_scale (time, mpeg_dec->stream_info.fps_n,
mpeg_dec->stream_info.fps_d * GST_SECOND) + gop.frame;
if (mpeg_dec->state == GST_VDP_MPEG_DEC_STATE_NEED_GOP)
mpeg_dec->state = GST_VDP_MPEG_DEC_STATE_NEED_DATA;
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_handle_quant_matrix (GstVdpMpegDec * mpeg_dec,
GstBuffer * buffer)
{
MPEGQuantMatrix qm;
if (!mpeg_util_parse_quant_matrix (&qm, buffer))
return FALSE;
memcpy (&mpeg_dec->vdp_info.intra_quantizer_matrix,
&qm.intra_quantizer_matrix, 64);
memcpy (&mpeg_dec->vdp_info.non_intra_quantizer_matrix,
&qm.non_intra_quantizer_matrix, 64);
return TRUE;
}
static GstFlowReturn
gst_vdp_mpeg_dec_handle_sequence (GstVdpMpegDec * mpeg_dec,
GstBuffer * seq, GstBuffer * seq_ext)
{
GstBaseVideoDecoder *base_video_decoder = GST_BASE_VIDEO_DECODER (mpeg_dec);
MPEGSeqHdr hdr;
GstVdpMpegStreamInfo stream_info;
if (!mpeg_util_parse_sequence_hdr (&hdr, seq))
return GST_FLOW_CUSTOM_ERROR;
memcpy (&mpeg_dec->vdp_info.intra_quantizer_matrix,
&hdr.intra_quantizer_matrix, 64);
memcpy (&mpeg_dec->vdp_info.non_intra_quantizer_matrix,
&hdr.non_intra_quantizer_matrix, 64);
stream_info.width = hdr.width;
stream_info.height = hdr.height;
stream_info.fps_n = hdr.fps_n;
stream_info.fps_d = hdr.fps_d;
stream_info.par_n = hdr.par_w;
stream_info.par_d = hdr.par_h;
stream_info.interlaced = FALSE;
stream_info.version = 1;
stream_info.profile = VDP_DECODER_PROFILE_MPEG1;
if (seq_ext) {
MPEGSeqExtHdr ext;
if (!mpeg_util_parse_sequence_extension (&ext, seq_ext))
return GST_FLOW_CUSTOM_ERROR;
stream_info.fps_n *= (ext.fps_n_ext + 1);
stream_info.fps_d *= (ext.fps_d_ext + 1);
stream_info.width += (ext.horiz_size_ext << 12);
stream_info.height += (ext.vert_size_ext << 12);
stream_info.interlaced = !ext.progressive;
stream_info.version = 2;
stream_info.profile = gst_vdp_mpeg_dec_get_profile (&ext);
}
if (memcmp (&mpeg_dec->stream_info, &stream_info,
sizeof (GstVdpMpegStreamInfo)) != 0) {
GstVideoState state;
GstFlowReturn ret;
state = gst_base_video_decoder_get_state (base_video_decoder);
state.width = stream_info.width;
state.height = stream_info.height;
state.fps_n = stream_info.fps_n;
state.fps_d = stream_info.fps_d;
state.par_n = stream_info.par_n;
state.par_d = stream_info.par_d;
state.interlaced = stream_info.interlaced;
gst_base_video_decoder_set_state (base_video_decoder, state);
ret = gst_vdp_decoder_init_decoder (GST_VDP_DECODER (mpeg_dec),
stream_info.profile, 2);
if (ret != GST_FLOW_OK)
return ret;
memcpy (&mpeg_dec->stream_info, &stream_info,
sizeof (GstVdpMpegStreamInfo));
}
mpeg_dec->state = GST_VDP_MPEG_DEC_STATE_NEED_DATA;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_vdp_mpeg_dec_handle_frame (GstBaseVideoDecoder * base_video_decoder,
GstVideoFrame * frame, GstClockTimeDiff deadline)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (base_video_decoder);
VdpPictureInfoMPEG1Or2 *info;
GstVdpMpegFrame *mpeg_frame;
GstFlowReturn ret;
VdpBitstreamBuffer vbit[1];
GstVdpVideoBuffer *outbuf;
/* MPEG_PACKET_SEQUENCE */
mpeg_frame = GST_VDP_MPEG_FRAME (frame);
if (mpeg_frame->seq) {
ret = gst_vdp_mpeg_dec_handle_sequence (mpeg_dec, mpeg_frame->seq,
mpeg_frame->seq_ext);
if (ret != GST_FLOW_OK) {
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return ret;
}
}
if (mpeg_dec->state == GST_VDP_MPEG_DEC_STATE_NEED_SEQUENCE) {
GST_DEBUG_OBJECT (mpeg_dec, "Drop frame since we haven't found a "
"MPEG_PACKET_SEQUENCE yet");
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_OK;
}
/* MPEG_PACKET_PICTURE */
if (mpeg_frame->pic)
gst_vdp_mpeg_dec_handle_picture (mpeg_dec, mpeg_frame->pic);
/* MPEG_PACKET_EXT_PICTURE_CODING */
if (mpeg_frame->pic_ext)
gst_vdp_mpeg_dec_handle_picture_coding (mpeg_dec, mpeg_frame->pic_ext,
frame);
/* MPEG_PACKET_GOP */
if (mpeg_frame->gop)
gst_vdp_mpeg_dec_handle_gop (mpeg_dec, mpeg_frame->gop);
/* MPEG_PACKET_EXT_QUANT_MATRIX */
if (mpeg_frame->qm_ext)
gst_vdp_mpeg_dec_handle_quant_matrix (mpeg_dec, mpeg_frame->qm_ext);
info = &mpeg_dec->vdp_info;
info->slice_count = mpeg_frame->n_slices;
/* check if we can decode the frame */
if (info->picture_coding_type != I_FRAME
&& info->backward_reference == VDP_INVALID_HANDLE) {
GST_DEBUG_OBJECT (mpeg_dec,
"Drop frame since we haven't got an I_FRAME yet");
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_OK;
}
if (info->picture_coding_type == B_FRAME
&& info->forward_reference == VDP_INVALID_HANDLE) {
GST_DEBUG_OBJECT (mpeg_dec,
"Drop frame since we haven't got two non B_FRAMES yet");
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_OK;
}
if (info->picture_coding_type != B_FRAME) {
if (info->backward_reference != VDP_INVALID_HANDLE) {
gst_base_video_decoder_finish_frame (base_video_decoder,
mpeg_dec->b_frame);
}
if (info->forward_reference != VDP_INVALID_HANDLE) {
gst_video_frame_unref (mpeg_dec->f_frame);
info->forward_reference = VDP_INVALID_HANDLE;
}
info->forward_reference = info->backward_reference;
mpeg_dec->f_frame = mpeg_dec->b_frame;
info->backward_reference = VDP_INVALID_HANDLE;
}
/* decode */
vbit[0].struct_version = VDP_BITSTREAM_BUFFER_VERSION;
vbit[0].bitstream = GST_BUFFER_DATA (mpeg_frame->slices);
vbit[0].bitstream_bytes = GST_BUFFER_SIZE (mpeg_frame->slices);
ret = gst_vdp_decoder_render (GST_VDP_DECODER (mpeg_dec),
(VdpPictureInfo *) info, 1, vbit, &outbuf);
if (ret != GST_FLOW_OK)
return ret;
frame->src_buffer = GST_BUFFER_CAST (outbuf);
if (info->picture_coding_type == B_FRAME) {
gst_base_video_decoder_finish_frame (base_video_decoder, frame);
} else {
info->backward_reference = GST_VDP_VIDEO_BUFFER (outbuf)->surface;
mpeg_dec->b_frame = gst_video_frame_ref (frame);
}
return GST_FLOW_OK;
}
static GstVideoFrame *
gst_vdp_mpeg_dec_create_frame (GstBaseVideoDecoder * base_video_decoder)
{
return GST_VIDEO_FRAME (gst_vdp_mpeg_frame_new ());
}
static GstFlowReturn
gst_vdp_mpeg_dec_parse_data (GstBaseVideoDecoder * base_video_decoder,
GstBuffer * buf, gboolean at_eos, GstVideoFrame * frame)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (base_video_decoder);
GstVdpMpegFrame *mpeg_frame;
GstFlowReturn ret = GST_FLOW_OK;
GstBitReader b_reader = GST_BIT_READER_INIT_FROM_BUFFER (buf);
guint8 start_code;
/* skip sync_code */
gst_bit_reader_skip (&b_reader, 8 * 3);
/* start_code */
if (!gst_bit_reader_get_bits_uint8 (&b_reader, &start_code, 8))
return GST_FLOW_ERROR;
mpeg_frame = GST_VDP_MPEG_FRAME_CAST (frame);
if (start_code >= MPEG_PACKET_SLICE_MIN
&& start_code <= MPEG_PACKET_SLICE_MAX) {
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_SLICE");
gst_vdp_mpeg_frame_add_slice (mpeg_frame, buf);
goto done;
}
switch (start_code) {
case MPEG_PACKET_SEQUENCE:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_SEQUENCE");
if (mpeg_dec->prev_packet != -1)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg_frame);
mpeg_frame->seq = buf;
break;
case MPEG_PACKET_PICTURE:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_PICTURE");
if (mpeg_dec->prev_packet != MPEG_PACKET_SEQUENCE &&
mpeg_dec->prev_packet != MPEG_PACKET_GOP)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg_frame);
mpeg_frame->pic = buf;
break;
case MPEG_PACKET_GOP:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_GOP");
if (mpeg_dec->prev_packet != MPEG_PACKET_SEQUENCE)
ret = gst_base_video_decoder_have_frame (base_video_decoder, FALSE,
(GstVideoFrame **) & mpeg_frame);
mpeg_frame->gop = buf;
break;
case MPEG_PACKET_EXTENSION:
{
guint8 ext_code;
/* ext_code */
if (!gst_bit_reader_get_bits_uint8 (&b_reader, &ext_code, 4)) {
ret = GST_FLOW_ERROR;
gst_buffer_unref (buf);
goto done;
}
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXTENSION: %d", ext_code);
switch (ext_code) {
case MPEG_PACKET_EXT_SEQUENCE:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXT_SEQUENCE");
mpeg_frame->seq_ext = buf;
/* so that we don't finish the frame if we get a MPEG_PACKET_PICTURE
* or MPEG_PACKET_GOP after this */
start_code = MPEG_PACKET_SEQUENCE;
break;
case MPEG_PACKET_EXT_SEQUENCE_DISPLAY:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXT_SEQUENCE_DISPLAY");
/* so that we don't finish the frame if we get a MPEG_PACKET_PICTURE
* or MPEG_PACKET_GOP after this */
start_code = MPEG_PACKET_SEQUENCE;
break;
case MPEG_PACKET_EXT_PICTURE_CODING:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXT_PICTURE_CODING");
mpeg_frame->pic_ext = buf;
break;
case MPEG_PACKET_EXT_QUANT_MATRIX:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXT_QUANT_MATRIX");
mpeg_frame->qm_ext = buf;
break;
default:
gst_buffer_unref (buf);
}
break;
}
default:
gst_buffer_unref (buf);
}
if (at_eos && mpeg_frame->slices)
ret = gst_base_video_decoder_have_frame (base_video_decoder, TRUE, NULL);
done:
mpeg_dec->prev_packet = start_code;
return ret;
}
static gint
gst_vdp_mpeg_dec_scan_for_sync (GstBaseVideoDecoder * base_video_decoder,
GstAdapter * adapter)
{
gint m;
m = gst_adapter_masked_scan_uint32 (adapter, 0xffffff00, 0x00000100, 0,
gst_adapter_available (adapter));
if (m == -1)
return gst_adapter_available (adapter) - SYNC_CODE_SIZE;
return m;
}
static GstBaseVideoDecoderScanResult
gst_vdp_mpeg_dec_scan_for_packet_end (GstBaseVideoDecoder * base_video_decoder,
GstAdapter * adapter, guint * size, gboolean at_eos)
{
guint8 *data;
guint32 sync_code;
data = g_slice_alloc (SYNC_CODE_SIZE);
gst_adapter_copy (adapter, data, 0, SYNC_CODE_SIZE);
sync_code = ((data[0] << 16) | (data[1] << 8) | data[2]);
if (sync_code != 0x000001)
return GST_BASE_VIDEO_DECODER_SCAN_RESULT_LOST_SYNC;
*size = gst_adapter_masked_scan_uint32 (adapter, 0xffffff00, 0x00000100,
SYNC_CODE_SIZE, gst_adapter_available (adapter) - SYNC_CODE_SIZE);
if (*size == -1)
return GST_BASE_VIDEO_DECODER_SCAN_RESULT_NEED_DATA;
return GST_BASE_VIDEO_DECODER_SCAN_RESULT_OK;
}
static gboolean
gst_vdp_mpeg_dec_flush (GstBaseVideoDecoder * base_video_decoder)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (base_video_decoder);
if (mpeg_dec->vdp_info.forward_reference != VDP_INVALID_HANDLE)
gst_video_frame_unref (mpeg_dec->f_frame);
if (mpeg_dec->vdp_info.backward_reference != VDP_INVALID_HANDLE)
gst_video_frame_unref (mpeg_dec->b_frame);
gst_vdp_mpeg_dec_init_info (&mpeg_dec->vdp_info);
mpeg_dec->prev_packet = -1;
return TRUE;
}
static gboolean
gst_vdp_mpeg_dec_start (GstBaseVideoDecoder * base_video_decoder)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (base_video_decoder);
gst_vdp_mpeg_dec_init_info (&mpeg_dec->vdp_info);
mpeg_dec->decoder = VDP_INVALID_HANDLE;
mpeg_dec->state = GST_VDP_MPEG_DEC_STATE_NEED_SEQUENCE;
memset (&mpeg_dec->stream_info, 0, sizeof (GstVdpMpegStreamInfo));
return GST_BASE_VIDEO_DECODER_CLASS
(parent_class)->start (base_video_decoder);
}
static gboolean
gst_vdp_mpeg_dec_stop (GstBaseVideoDecoder * base_video_decoder)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (base_video_decoder);
if (mpeg_dec->vdp_info.forward_reference != VDP_INVALID_HANDLE)
mpeg_dec->vdp_info.forward_reference = VDP_INVALID_HANDLE;
if (mpeg_dec->vdp_info.backward_reference != VDP_INVALID_HANDLE)
mpeg_dec->vdp_info.backward_reference = VDP_INVALID_HANDLE;
mpeg_dec->state = GST_VDP_MPEG_DEC_STATE_NEED_SEQUENCE;
return GST_BASE_VIDEO_DECODER_CLASS (parent_class)->stop (base_video_decoder);
}
static void
gst_vdp_mpeg_dec_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"VDPAU Mpeg Decoder",
"Decoder",
"Decode mpeg stream with vdpau",
"Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
}
/* initialize the vdpaumpegdecoder's class */
static void
gst_vdp_mpeg_dec_class_init (GstVdpMpegDecClass * klass)
{
GstBaseVideoDecoderClass *base_video_decoder_class;
base_video_decoder_class = GST_BASE_VIDEO_DECODER_CLASS (klass);
base_video_decoder_class->start = gst_vdp_mpeg_dec_start;
base_video_decoder_class->stop = gst_vdp_mpeg_dec_stop;
base_video_decoder_class->flush = gst_vdp_mpeg_dec_flush;
base_video_decoder_class->scan_for_sync = gst_vdp_mpeg_dec_scan_for_sync;
base_video_decoder_class->scan_for_packet_end =
gst_vdp_mpeg_dec_scan_for_packet_end;
base_video_decoder_class->parse_data = gst_vdp_mpeg_dec_parse_data;
base_video_decoder_class->handle_frame = gst_vdp_mpeg_dec_handle_frame;
base_video_decoder_class->create_frame = gst_vdp_mpeg_dec_create_frame;
}
static void
gst_vdp_mpeg_dec_init_info (VdpPictureInfoMPEG1Or2 * vdp_info)
{
vdp_info->forward_reference = VDP_INVALID_HANDLE;
vdp_info->backward_reference = VDP_INVALID_HANDLE;
vdp_info->slice_count = 0;
vdp_info->picture_structure = 3;
vdp_info->picture_coding_type = 0;
vdp_info->intra_dc_precision = 0;
vdp_info->frame_pred_frame_dct = 1;
vdp_info->concealment_motion_vectors = 0;
vdp_info->intra_vlc_format = 0;
vdp_info->alternate_scan = 0;
vdp_info->q_scale_type = 0;
vdp_info->top_field_first = 1;
}
static void
gst_vdp_mpeg_dec_init (GstVdpMpegDec * mpeg_dec, GstVdpMpegDecClass * gclass)
{
}