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rtph263depay: extra keyframe info from PTYPE header

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... as opposed to taking it from h263 payload header, which need not
be so reliable.

Fixes #610172.
This commit is contained in:
Mark Nauwelaerts 2010-04-16 17:21:50 +02:00
parent fe9e6d82ee
commit 0206b67b1d
2 changed files with 10 additions and 1 deletions
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10
gst/rtp/gstrtph263depay.c
View file

@ -206,7 +206,6 @@ gst_rtp_h263_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/ */
I = (payload[1] & 0x10) == 0x10; I = (payload[1] & 0x10) == 0x10;
} else { } else {
if (P == 0) { if (P == 0) {
/* F == 1 and P == 0 /* F == 1 and P == 0
@ -257,12 +256,21 @@ gst_rtp_h263_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
if (!F && payload_len > 4 && (GST_READ_UINT32_BE (payload) >> 10 == 0x20)) { if (!F && payload_len > 4 && (GST_READ_UINT32_BE (payload) >> 10 == 0x20)) {
GST_DEBUG ("Mode A with PSC => frame start"); GST_DEBUG ("Mode A with PSC => frame start");
rtph263depay->start = TRUE; rtph263depay->start = TRUE;
if (!!(payload[4] & 0x02) != I) {
GST_DEBUG ("Wrong Picture Coding Type Flag in rtp header");
I = !I;
}
rtph263depay->psc_I = I;
} else { } else {
GST_DEBUG ("no frame start yet, skipping payload"); GST_DEBUG ("no frame start yet, skipping payload");
goto skip; goto skip;
} }
} }
/* only trust I info from Mode A starting packet
* from buggy payloaders or hw */
I = rtph263depay->psc_I;
if (SBIT) { if (SBIT) {
/* take the leftover and merge it at the beginning, FIXME make the buffer /* take the leftover and merge it at the beginning, FIXME make the buffer
* data writable. */ * data writable. */

1
gst/rtp/gstrtph263depay.h
View file

@ -46,6 +46,7 @@ struct _GstRtpH263Depay
guint8 offset; /* offset to apply to next payload */ guint8 offset; /* offset to apply to next payload */
guint8 leftover; /* leftover from previous payload (if offset != 0) */ guint8 leftover; /* leftover from previous payload (if offset != 0) */
gboolean psc_I; /* Picture-Coding-Type == I from Picture Start Code packet */
GstAdapter *adapter; GstAdapter *adapter;
gboolean start; gboolean start;
}; };