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vdpau: small improvement to mpeg decoder

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This commit is contained in:
Carl-Anton Ingmarsson 2009-04-13 21:11:54 +02:00 committed by Jan Schmidt
parent 91ff1579f3
commit 1234267cb5
3 changed files with 23 additions and 9 deletions
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28
sys/vdpau/gstvdpaumpegdecoder.c
View file

@ -112,6 +112,7 @@ gst_vdpau_mpeg_decoder_set_caps (GstVdpauDecoder * dec, GstCaps * caps)
break;
}
}
memcpy (&mpeg_dec->vdp_info.intra_quantizer_matrix,
&hdr.intra_quantizer_matrix, 64);
memcpy (&mpeg_dec->vdp_info.non_intra_quantizer_matrix,
@ -210,12 +211,15 @@ gst_vdpau_mpeg_decoder_parse_picture_coding (GstVdpauMpegDecoder * mpeg_dec,
info->intra_dc_precision = pic_ext.intra_dc_precision;
info->picture_structure = pic_ext.picture_structure;
GST_DEBUG ("Picture structure %d", info->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;
mpeg_dec->want_slice = TRUE;
return TRUE;
}
@ -266,7 +270,10 @@ gst_vdpau_mpeg_decoder_parse_picture (GstVdpauMpegDecoder * mpeg_dec,
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->want_slice = TRUE;
} else
mpeg_dec->want_slice = FALSE;
return TRUE;
}
@ -326,12 +333,14 @@ gst_vdpau_mpeg_decoder_chain (GstPad * pad, GstBuffer * buffer)
GstBuffer *subbuf;
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_SLICE");
subbuf =
gst_buffer_create_sub (buffer,
packet_start - GST_BUFFER_DATA (buffer), packet_end - packet_start);
gst_adapter_push (mpeg_dec->adapter, subbuf);
mpeg_dec->vdp_info.slice_count++;
} else if (mpeg_dec->vdp_info.slice_count > 0) {
if (mpeg_dec->want_slice) {
subbuf =
gst_buffer_create_sub (buffer,
packet_start - GST_BUFFER_DATA (buffer), packet_end - packet_start);
gst_adapter_push (mpeg_dec->adapter, subbuf);
mpeg_dec->vdp_info.slice_count++;
}
} else if (mpeg_dec->vdp_info.slice_count > 0 && mpeg_dec->want_slice) {
if (gst_vdpau_mpeg_decoder_decode (mpeg_dec) != GST_FLOW_OK)
return GST_FLOW_ERROR;
}
@ -344,7 +353,8 @@ gst_vdpau_mpeg_decoder_chain (GstPad * pad, GstBuffer * buffer)
break;
case MPEG_PACKET_SEQUENCE:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_SEQUENCE");
gst_vdpau_mpeg_decoder_parse_sequence (mpeg_dec, data, end);
gst_vdpau_mpeg_decoder_parse_sequence (mpeg_dec, packet_start,
packet_end);
break;
case MPEG_PACKET_EXTENSION:
GST_DEBUG_OBJECT (mpeg_dec, "MPEG_PACKET_EXTENSION");
@ -436,6 +446,8 @@ gst_vdpau_mpeg_decoder_init (GstVdpauMpegDecoder * mpeg_dec,
mpeg_dec->adapter = gst_adapter_new ();
mpeg_dec->want_slice = FALSE;
gst_pad_set_chain_function (dec->sink, gst_vdpau_mpeg_decoder_chain);
}

2
sys/vdpau/gstvdpaumpegdecoder.h
View file

@ -46,6 +46,8 @@ struct _GstVdpauMpegDecoder
VdpDecoder decoder;
VdpPictureInfoMPEG1Or2 vdp_info;
GstBuffer *f_buffer;
gboolean want_slice;
GstAdapter *adapter;
gint slices;

2
sys/vdpau/mpegutil.c
View file

@ -314,7 +314,7 @@ mpeg_util_parse_picture_coding_extension (MPEGPictureExt * ext, guint8 * data,
{
guint32 code;
if (G_UNLIKELY ((end - data) < 10))
if (G_UNLIKELY ((end - data) < 9))
return FALSE; /* Packet too small */
code = GST_READ_UINT32_BE (data);