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rtph265pay: don't add trailing zeros to VPS/PPS/SPS

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This would happen if input is byte-stream with four-byte
sync markers instead of three-byte ones. The code that
scans for sync markers will place the start of the NALU
on the third-last byte of the NALU sync marker, which
means that any additional zeros may be counted as belonging
to the previous NALU instead of being part of the next sync
marker. Fix that so we don't send VPS/SPS/PPS with trailing
zeros in this case.

See https://bugzilla.gnome.org/show_bug.cgi?id=732758
This commit is contained in:
Tim-Philipp Müller 2017-08-08 18:58:11 +01:00
parent 311b9895ba
commit b84201bf81
1 changed files with 5 additions and 1 deletions
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6
gst/rtp/gstrtph265pay.c
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@ -733,7 +733,7 @@ next_start_code (const guint8 * data, guint size)
* sense because our search 'alphabet' is binary - 0 & 1 only.
* This allow us to simplify the general BM algorithm to a very
* simple form. */
/* assume 1 is in the 3th byte */
/* assume 1 is in the 3rd byte */
guint offset = 2;
while (offset < size) {
@ -785,6 +785,10 @@ gst_rtp_h265_pay_decode_nal (GstRtpH265Pay * payloader,
|| GST_H265_NAL_PPS == type) {
GstBuffer *nal;
/* trailing 0x0 are not part of the VPS/SPS/PPS */
while (size > 0 && data[size - 1] == 0x0)
size--;
/* encode the entire NAL in base64 */
GST_DEBUG_OBJECT (payloader, "found %s (type 0x%x), size %u",
type == GST_H265_NAL_VPS ? "VPS" : type == GST_H265_NAL_SPS ?