[FFmpeg-devel] [PATCH] RTP H.264 / AVC support

Luca Abeni lucabe72
Tue Jun 1 10:50:04 CEST 2010


On 06/01/2010 09:16 AM, Howard Chu wrote:
>> Moreover, the code introduced in ff_rtp_send_h264() and in
>> sdp.c:extradata2psets()
>> did the same thing (split an "AVC format" frame in NALs) using slightly
>> different code (compare "len = (len<< 8) | *r++;" with "nalsize =
>> AV_RB16(r);").
>> Regarding the new patch: as I said, I do not think this
>> ff_avc_parse_nal_units_inplace() is the correct thing to simplify the
>> code.
>> (moreover, I am still convinced that this function does the same things
>> done by the h264.c code I mentioned above).
> OK, this set of patches consolidates the code using a callback function.

Regarding the h264.c modifications, I cannot comment on them, but I do not
like this callback approach. Did you try the approach I suggested?

The rtpenc.{c,h} part of the patch is ok.

The rtpenc_h264.c part of the patch depends on the h264.c patch; if someone
approves that one, the rtpenc_h264.c patch looks ok (modulo the fact that I
do not know if libavformat can use ff_* functions defined in libavcodec).

Regarding the sdp.c patch, I am not sure about the complexity added by
callback... Maybe opencoding the call the the NAL parsing function would
simplify the code.
Moreover, the patch changes "uint8_t nal_type" in "int naltype" and
introduces some unrelated changes.


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