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rtph263pdepay: flag keyframes on output buffers

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1091>
This commit is contained in:
Tim-Philipp Müller 2021-09-22 14:03:57 +01:00
parent 972184f434
commit 2d23bccf47
1 changed files with 94 additions and 0 deletions
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94
gst/rtp/gstrtph263pdepay.c
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@ -234,6 +234,98 @@ no_caps:
}
}
static void
gst_rtp_h263p_depay_decorate_output_buffer (GstRtpH263PDepay * rtph263pdepay,
GstBuffer * outbuf)
{
gboolean is_intra = FALSE;
GstBitReader bits;
guint8 pic_hdr[16];
gsize pic_hdr_len = 0;
guint32 psc, ptype, mpptype;
guint8 ufep;
pic_hdr_len = gst_buffer_extract (outbuf, 0, pic_hdr, sizeof (pic_hdr));
GST_MEMDUMP_OBJECT (rtph263pdepay, "pic_hdr", pic_hdr, pic_hdr_len);
#if 0
if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= GST_LEVEL_MEMDUMP) {
gchar bit_str[1 + sizeof (pic_hdr) * 8] = { 0, };
guint8 b;
gst_bit_reader_init (&bits, pic_hdr, pic_hdr_len);
while ((gst_bit_reader_get_bits_uint8 (&bits, &b, 1))) {
g_strlcat (bit_str, b ? "1" : "0", sizeof (bit_str));
}
GST_TRACE_OBJECT (rtph263pdepay, "pic_hdr bits: %s", bit_str);
}
#endif
gst_bit_reader_init (&bits, pic_hdr, pic_hdr_len);
/* PSC - Picture Start Code: 22 bits: 0000 0000 0000 0000 10 0000 */
if (!gst_bit_reader_get_bits_uint32 (&bits, &psc, 22) || psc != 0x20) {
GST_WARNING_OBJECT (rtph263pdepay, "No picture start code");
return;
}
/* TR - Temporal Reference: 8 bits */
if (!gst_bit_reader_skip (&bits, 8)) {
GST_WARNING_OBJECT (rtph263pdepay, "Short picture header: no TR");
return;
}
/* PTYPE (first 8 bits) */
if (!gst_bit_reader_get_bits_uint32 (&bits, &ptype, 8) || (ptype >> 6) != 2) {
GST_WARNING_OBJECT (rtph263pdepay, "Short picture header: no PTYPE");
return;
}
/* PTYPE: check for extended PTYPE (bits 6-8 = 111) */
if ((ptype & 7) != 7) {
/* No extended PTYPE, read remaining 5 bits */
if (!gst_bit_reader_get_bits_uint32 (&bits, &ptype, 5)) {
GST_WARNING_OBJECT (rtph263pdepay, "Short picture header: no PTYPE");
return;
}
is_intra = (ptype & 0x10) == 0;
goto done;
}
/* UFEP - Update Full Extended PTYPE */
ufep = 0;
if (!gst_bit_reader_get_bits_uint8 (&bits, &ufep, 3) || ufep > 1) {
GST_WARNING_OBJECT (rtph263pdepay, "Short picture header: no PLUSPTYPE, %d",
ufep);
return;
}
/* Skip optional part of PLUSPTYPE (OPPTYPE) */
if (ufep == 1 && !gst_bit_reader_skip (&bits, 18)) {
GST_WARNING_OBJECT (rtph263pdepay, "Short picture header: no OPPTYPE");
return;
}
/* Mandatory part of PLUSPTYPE (MPPTYPE) */
if (!gst_bit_reader_get_bits_uint32 (&bits, &mpptype, 9)
|| (mpptype & 7) != 1) {
GST_WARNING_OBJECT (rtph263pdepay, "Short picture header: no MPPTYPE");
return;
}
is_intra = (mpptype >> 6) == 0;
done:
if (is_intra) {
GST_LOG_OBJECT (rtph263pdepay, "I-frame");
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
} else {
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
}
}
static GstBuffer *
gst_rtp_h263p_depay_process (GstRTPBaseDepayload * depayload,
GstRTPBuffer * rtp)
@ -336,6 +428,8 @@ gst_rtp_h263p_depay_process (GstRTPBaseDepayload * depayload,
gst_rtp_drop_non_video_meta (rtph263pdepay, outbuf);
gst_rtp_h263p_depay_decorate_output_buffer (rtph263pdepay, outbuf);
return outbuf;
} else {
/* frame not completed: store in adapter */