[FFmpeg-devel] [PATCH] RTP depacketizer for H.263

[Michael Niedermayer]

On Mon, Jan 25, 2010 at 05:05:23PM +0200, Martin Storsj? wrote:
[...]
> +static int h263_handle_packet(AVFormatContext *ctx,
> +                              PayloadContext *data,
> +                              AVStream *st,
> +                              AVPacket * pkt,
> +                              uint32_t * timestamp,
> +                              const uint8_t * buf,
> +                              int len, int flags)
> +{
> +    uint8_t *ptr;
> +    int P, V, plen, pebit;
> +
> +    if (len < 2) {
> +        av_log(ctx, AV_LOG_ERROR, "Too short H.263 RTP packet\n");
> +        return AVERROR_INVALIDDATA;
> +    }
> +
> +    /* Decode the 16 bit H.263+ payload header, as described in section
> +     * 5.1 of RFC 4629.
> +     * If P is set, it indicates a picture start, picture segment start
> +     * or video sequence end, and two zero bytes should be prepended to
> +     * the payload.
> +     * If V is set, an 8 bit Video Redundancy Coding field is present
> +     * after this 16 bit header.
> +     * plen is the length (in bytes) of an extra picture header, following
> +     * the VRC field.
> +     * pebit is the number of bits to ignore of the last byte of the extra
> +     * picture header.
> +     */

N d p v n. A F t v n f

A // Always
d // document
F // fix
f // first
N // Never
n // names
p // poor
t // the
v // variable

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

The educated differ from the uneducated as much as the living from the
dead. -- Aristotle 
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