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theorapay: handle 0 sized packets

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Handle 0 sized packets (repeat frame) in the payloader and depayloader.

Fixes #641827
This commit is contained in:
Wim Taymans 2011-02-14 16:46:46 +01:00
parent d203b1ef50
commit 4279aa6a68
2 changed files with 13 additions and 9 deletions
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6
gst/rtp/gstrtptheoradepay.c
View file

@ -501,7 +501,7 @@ gst_rtp_theora_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
to_free = payload;
}
GST_DEBUG_OBJECT (depayload, "assemble done");
GST_DEBUG_OBJECT (depayload, "assemble done, payload_len %d", payload_len);
/* we not assembling anymore now */
rtptheoradepay->assembling = FALSE;
@ -524,7 +524,7 @@ gst_rtp_theora_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
*/
timestamp = gst_rtp_buffer_get_timestamp (buf);
while (payload_len > 2) {
while (payload_len >= 2) {
guint16 length;
length = GST_READ_UINT16_BE (payload);
@ -559,7 +559,7 @@ gst_rtp_theora_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
memcpy (GST_BUFFER_DATA (outbuf), payload, length);
}
if ((payload[0] & 0xC0) == 0x0)
if (payload_len > 0 && (payload[0] & 0xC0) == 0x0)
rtptheoradepay->needs_keyframe = FALSE;
payload += length;

16
gst/rtp/gstrtptheorapay.c
View file

@ -563,7 +563,7 @@ gst_rtp_theora_pay_payload_buffer (GstRtpTheoraPay * rtptheorapay, guint8 TDT,
/* put buffer in packet, it either fits completely or needs to be fragmented
* over multiple RTP packets. */
while (size) {
do {
plen = MIN (rtptheorapay->payload_left - 2, size);
GST_DEBUG_OBJECT (rtptheorapay, "append %u bytes", plen);
@ -571,7 +571,8 @@ gst_rtp_theora_pay_payload_buffer (GstRtpTheoraPay * rtptheorapay, guint8 TDT,
/* data is copied in the payload with a 2 byte length header */
ppos[0] = ((plen - not_in_length) >> 8) & 0xff;
ppos[1] = ((plen - not_in_length) & 0xff);
memcpy (&ppos[2], data, plen);
if (plen)
memcpy (&ppos[2], data, plen);
/* only first (only) configuration cuts length field */
/* NOTE: spec (if any) is not clear on this ... */
@ -617,7 +618,7 @@ gst_rtp_theora_pay_payload_buffer (GstRtpTheoraPay * rtptheorapay, guint8 TDT,
if (duration != GST_CLOCK_TIME_NONE)
rtptheorapay->payload_duration += duration;
}
}
} while (size);
return ret;
}
@ -644,11 +645,14 @@ gst_rtp_theora_pay_handle_buffer (GstBaseRTPPayload * basepayload,
GST_DEBUG_OBJECT (rtptheorapay, "size %u, duration %" GST_TIME_FORMAT,
size, GST_TIME_ARGS (duration));
if (G_UNLIKELY (size < 1 || size > 0xffff))
if (G_UNLIKELY (size > 0xffff))
goto wrong_size;
/* find packet type */
if (data[0] & 0x80) {
if (size == 0) {
TDT = 0;
keyframe = FALSE;
} else if (data[0] & 0x80) {
/* header */
if (data[0] == 0x80) {
/* identification, we need to parse this in order to get the clock rate.
@ -743,7 +747,7 @@ done:
wrong_size:
{
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
("Invalid packet size (1 < %d <= 0xffff)", size), (NULL));
("Invalid packet size (%d <= 0xffff)", size), (NULL));
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}