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h264parse: decode SEI

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This commit is contained in:
Lin YANG 2009-08-17 17:53:11 +08:00 committed by Sebastian Dröge
parent dc696c4ffb
commit 62ac493c5c
1 changed files with 39 additions and 0 deletions
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39
gst/h264parse/gsth264parse.c
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@ -680,6 +680,45 @@ gst_sei_decode_picture_timing (GstH264Parse * h, GstNalBs * bs)
return 0;
}
/* decode supplimental enhancement information */
static gboolean
gst_nal_decode_sei (GstH264Parse * h, GstNalBs * bs)
{
guint8 tmp;
GstSeiPayloadType payloadType = 0;
gint8 payloadSize = 0;
do {
tmp = gst_nal_bs_read (bs, 8);
payloadType += tmp;
} while (tmp == 255);
do {
tmp = gst_nal_bs_read (bs, 8);
payloadSize += tmp;
} while (tmp == 255);
GST_DEBUG_OBJECT (h,
"SEI message received: payloadType = %d, payloadSize = %d bytes",
payloadType, payloadSize);
switch (payloadType) {
case SEI_BUF_PERIOD:
if (!gst_sei_decode_buffering_period (h, bs))
return FALSE;
break;
case SEI_PIC_TIMING:
/* TODO: According to H264 D2.2 Note1, it might be the case that the
* picture timing SEI message is encountered before the corresponding SPS
* is specified. Need to hold down the message and decode it later. */
if (!gst_sei_decode_picture_timing (h, bs))
return FALSE;
break;
default:
GST_DEBUG_OBJECT (h, "SEI message of payloadType = %d is recieved but not"
" parsed", payloadType);
}
return TRUE;
}
GST_BOILERPLATE (GstH264Parse, gst_h264_parse, GstElement, GST_TYPE_ELEMENT);