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rtph264depay: DELTA_UNIT marking of output buffers

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... which evidently makes (most) sense if output buffers are
actually frames.

Partially based on a patch by
Miguel Angel Cabrera <mad_aluche at hotmail.com>

Fixes #609658.
This commit is contained in:
Mark Nauwelaerts 2010-04-15 12:21:56 +02:00
parent 0206b67b1d
commit 6bf7f5cfd3
2 changed files with 44 additions and 0 deletions
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43
gst/rtp/gstrtph264depay.c
View file

@ -399,6 +399,31 @@ incomplete_caps:
}
}
/* nal must have writable meta-data,
* returns TRUE if delta unit */
static gboolean
gst_rtp_h264_depay_mark_delta (GstRtpH264Depay * rtph264depay, GstBuffer * nal)
{
gint nal_unit_type;
gboolean res = FALSE;
if (G_UNLIKELY (GST_BUFFER_SIZE (nal) < 5))
return FALSE;
nal_unit_type = (GST_BUFFER_DATA (nal))[4] & 0x1f;
GST_DEBUG_OBJECT (rtph264depay, "type %d", nal_unit_type);
/* non-IDR VCL layer NAL considered DELTA */
if (nal_unit_type >= 1 && nal_unit_type <= 4) {
GST_BUFFER_FLAG_SET (nal, GST_BUFFER_FLAG_DELTA_UNIT);
res = TRUE;
} else {
GST_BUFFER_FLAG_UNSET (nal, GST_BUFFER_FLAG_DELTA_UNIT);
}
return res;
}
/* nal must have writable meta-data */
static GstBuffer *
gst_rtp_h264_depay_push_nal (GstRtpH264Depay * rtph264depay, GstBuffer * nal,
GstClockTime timestamp)
@ -441,6 +466,7 @@ gst_rtp_h264_depay_push_nal (GstRtpH264Depay * rtph264depay, GstBuffer * nal,
if (rtph264depay->picture_complete) {
outsize = gst_adapter_available (rtph264depay->picture_adapter);
outbuf = gst_adapter_take_buffer (rtph264depay->picture_adapter, outsize);
outbuf = gst_buffer_make_metadata_writable (outbuf);
rtph264depay->picture_complete = FALSE;
rtph264depay->picture_start = start;
@ -453,9 +479,17 @@ gst_rtp_h264_depay_push_nal (GstRtpH264Depay * rtph264depay, GstBuffer * nal,
if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
GST_CLOCK_TIME_IS_VALID (rtph264depay->last_ts))
GST_BUFFER_DURATION (outbuf) = timestamp - rtph264depay->last_ts;
if (rtph264depay->last_delta)
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
rtph264depay->last_delta = FALSE;
}
rtph264depay->last_ts = timestamp;
rtph264depay->last_delta = rtph264depay->last_delta ||
gst_rtp_h264_depay_mark_delta (rtph264depay, nal);
gst_adapter_push (rtph264depay->picture_adapter, nal);
return outbuf;
@ -585,6 +619,9 @@ gst_rtp_h264_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
if (!rtph264depay->merge) {
outsize = gst_adapter_available (rtph264depay->adapter);
outbuf = gst_adapter_take_buffer (rtph264depay->adapter, outsize);
outbuf = gst_buffer_make_metadata_writable (outbuf);
gst_rtp_h264_depay_mark_delta (rtph264depay, outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (depayload->srcpad));
return outbuf;
}
@ -670,6 +707,7 @@ gst_rtp_h264_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
outsize = gst_adapter_available (rtph264depay->adapter);
outbuf = gst_adapter_take_buffer (rtph264depay->adapter, outsize);
outbuf = gst_buffer_make_metadata_writable (outbuf);
outdata = GST_BUFFER_DATA (outbuf);
if (rtph264depay->byte_stream) {
@ -694,6 +732,8 @@ gst_rtp_h264_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
outbuf = gst_rtp_h264_depay_push_nal (rtph264depay, outbuf, ts);
if (!outbuf)
break;
} else {
gst_rtp_h264_depay_mark_delta (rtph264depay, outbuf);
}
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (depayload->srcpad));
@ -733,6 +773,8 @@ gst_rtp_h264_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
outbuf = gst_rtp_h264_depay_push_nal (rtph264depay, outbuf, ts);
if (!outbuf)
break;
} else {
gst_rtp_h264_depay_mark_delta (rtph264depay, outbuf);
}
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (depayload->srcpad));
@ -781,6 +823,7 @@ gst_rtp_h264_depay_change_state (GstElement * element,
gst_adapter_clear (rtph264depay->picture_adapter);
rtph264depay->picture_start = FALSE;
rtph264depay->picture_complete = FALSE;
rtph264depay->last_delta = FALSE;
break;
default:
break;

1
gst/rtp/gstrtph264depay.h
View file

@ -56,6 +56,7 @@ struct _GstRtpH264Depay
gboolean picture_start;
gboolean picture_complete;
GstClockTime last_ts;
gboolean last_delta;
};
struct _GstRtpH264DepayClass