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rtpvorbispay: in packed headers, properly flag multibyte lengths.

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In the sequence of header lengths, for headers >127 bytes, we use
multiple bytes to encode the length. Bytes other than the last must have
the top (flag) bit set.
This commit is contained in:
Michael Smith 2009-04-01 17:23:33 -07:00
parent 9b7c9208c3
commit 5f9d9e2243
1 changed files with 4 additions and 1 deletions
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5
gst/rtp/gstrtpvorbispay.c
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@ -338,6 +338,7 @@ gst_rtp_vorbis_pay_finish_headers (GstBaseRTPPayload * basepayload)
for (walk = rtpvorbispay->headers; walk; walk = g_list_next (walk)) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
guint bsize, size, temp;
guint flag;
/* only need to store the length when it's not the last header */
if (!g_list_next (walk))
@ -355,10 +356,12 @@ gst_rtp_vorbis_pay_finish_headers (GstBaseRTPPayload * basepayload)
bsize = GST_BUFFER_SIZE (buf);
/* write the size backwards */
flag = 0;
while (size) {
size--;
data[size] = bsize & 0x7f;
data[size] = (bsize & 0x7f) | flag;
bsize >>= 7;
flag = 0x80; /* Flag bit on all bytes of the length except the last */
}
data += temp;
}