[FFmpeg-devel] [RFC] SDP Generation
Wed Jul 25 10:45:27 CEST 2007
Luca Abeni <lucabe72 at email.it> writes:
> hopefully, I finally addressed all the comments. The SDP generator is
> now based on av_strlcatf(), and the overflow problems should be fixed
> (I did some tests, and coldn't manage to have it writing out of the
> allocated memory).
> Note: the check on extradata_size is based on a MAX_EXTRADATA_SIZE
> constant, that I set to (INT_MAX - 10) / 2 to avoid overflows. Since I
> do not know if such big extradata make sense or not, the constant can
> be decreased if needed.
> The doxygen comment for avf_sdp_create() will be in avformat.h (I'll
> send a patch in a short time), and will look like this:
> * Generate an SDP for an RTP session.
> * @param ac array of AVFormatContexts describing the RTP streams. If
> * the array is composed by only one context, such context
> * can contain multiple AVStreams (one AVStream per RTP
> * stream). Otherwise, all the contexts in the array (an
> * AVCodecContext per RTP stream) must contain only one
> * AVStream.
> * @param n_streams number of AVCodecContexts contained in ac
> * @return a pointed to the SDP (an array of chars which is allocated by
> * avf_sdp_create(), and must be freed by the caller), or NULL
> * in case of failure.
> Also, I am generating the patch for the build system, so I have a
> question for Diego or M?ns: can I build sdp.o unconditionally, or
> should I add a "--disable-sdp-generator" switch in configure?
A function declared in a public header file should normally be built
by default, unless it only serves as a helper for some optional
functionality, in which case it should be built whenever needed. I
haven't followed this discussion closely, so I don't know what the
intended use of this function is.
mans at mansr.com
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