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| author | Martin Storsjö <martin@martin.st> | 2012-02-07 16:39:14 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2012-02-23 15:27:52 +0200 |
| commit | c4584f3c1ff3997fd98c3cc992fe82cb99f6b248 (patch) | |
| tree | 27ab1cbe0c48ac4f703782ede6039ba46b6924a4 /libavformat/rtpenc.h | |
| parent | c2ff63e3ac82d5ee501e480d4714e982fc45cf8b (diff) | |
| download | ffmpeg-c4584f3c1ff3997fd98c3cc992fe82cb99f6b248.tar.gz | |
rtpenc: Allow packetizing H263 according to the old RFC 2190
According to newer RFCs, this packetization scheme should only
be used for interfacing with legacy systems.
Implementing this packetization mode properly requires parsing
the full H263 bitstream to find macroblock boundaries (and knowing
their macroblock and gob numbers and motion vector predictors).
This implementation tries to look for GOB headers (which
can be inserted by using -ps <small number>), but if the GOBs
aren't small enough to fit into the MTU, the packetizer blindly
splits packets at any offset and claims it to be a GOB boundary
(by using Mode A from the RFC). While not correct, this seems
to work with some receivers.
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavformat/rtpenc.h')
| -rw-r--r-- | libavformat/rtpenc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavformat/rtpenc.h b/libavformat/rtpenc.h index fdad24947b..ff423a55d1 100644 --- a/libavformat/rtpenc.h +++ b/libavformat/rtpenc.h @@ -64,15 +64,18 @@ struct RTPMuxContext { typedef struct RTPMuxContext RTPMuxContext; #define FF_RTP_FLAG_MP4A_LATM 1 +#define FF_RTP_FLAG_RFC2190 2 #define FF_RTP_FLAG_OPTS(ctx, fieldname) \ { "rtpflags", "RTP muxer flags", offsetof(ctx, fieldname), AV_OPT_TYPE_FLAGS, {.dbl = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \ { "latm", "Use MP4A-LATM packetization instead of MPEG4-GENERIC for AAC", 0, AV_OPT_TYPE_CONST, {.dbl = FF_RTP_FLAG_MP4A_LATM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \ + { "rfc2190", "Use RFC 2190 packetization instead of RFC 4629 for H.263", 0, AV_OPT_TYPE_CONST, {.dbl = FF_RTP_FLAG_RFC2190}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \ void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m); void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size); void ff_rtp_send_h263(AVFormatContext *s1, const uint8_t *buf1, int size); +void ff_rtp_send_h263_rfc2190(AVFormatContext *s1, const uint8_t *buf1, int size); void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size); void ff_rtp_send_latm(AVFormatContext *s1, const uint8_t *buff, int size); void ff_rtp_send_amr(AVFormatContext *s1, const uint8_t *buff, int size); @@ -80,4 +83,7 @@ void ff_rtp_send_mpegvideo(AVFormatContext *s1, const uint8_t *buf1, int size); void ff_rtp_send_xiph(AVFormatContext *s1, const uint8_t *buff, int size); void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buff, int size); +const uint8_t *ff_h263_find_resync_marker_reverse(const uint8_t *restrict start, + const uint8_t *restrict end); + #endif /* AVFORMAT_RTPENC_H */ |