[FFmpeg-devel] [PATCH 1/2] libavformat/avio: Add avio_get_dyn_buf function

[Michael Niedermayer]

On Thu, Jan 05, 2017 at 06:06:27PM +0000, Soft Works wrote:
> This commit adds the avio_get_dyn_buf function which allows accessing the
> content of a DynBuffer without destroying it.
> 
> This is required in matroskaenc for preliminary writing (correct) mkv headers.
> 
> Context for this change is fixing regression bug #5977.
> ---
>  libavformat/avio.h    | 12 ++++++++++++
>  libavformat/aviobuf.c | 17 +++++++++++++++++
>  2 files changed, 29 insertions(+)
> 
> diff --git a/libavformat/avio.h b/libavformat/avio.h
> index b1ce1d1..f2b9a6f 100644
> --- a/libavformat/avio.h
> +++ b/libavformat/avio.h
> @@ -704,6 +704,18 @@ int avio_closep(AVIOContext **s);
>  int avio_open_dyn_buf(AVIOContext **s);
>  
>  /**
> + * Return the written size and a pointer to the buffer. 
> + * The AVIOContext stream is left intact.
> + * The buffer must NOT be freed. 
> + * No padding is added to the buffer.
> + *
> + * @param s IO context
> + * @param pbuffer pointer to a byte buffer
> + * @return the length of the byte buffer
> + */
> +int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer);

adding a public function (av*)
needs minor version bump (libavformat/version.h) and
doc/APIchanges entry

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Good people do not need laws to tell them to act responsibly, while bad
people will find a way around the laws. -- Plato
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