2 * Sorenson-3 (SVQ3/SV3V) payload for RTP
3 * Copyright (c) 2010 Ronald S. Bultje
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * @brief RTP support for the SV3V (SVQ3) payload
25 * @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
26 * @see http://wiki.multimedia.cx/index.php?title=Sorenson_Video_3#Packetization
30 #include "libavutil/intreadwrite.h"
34 #include "rtpdec_formats.h"
36 struct PayloadContext
{
41 /** return 0 on packet, <0 on partial packet or error... */
42 static int svq3_parse_packet (AVFormatContext
*s
, PayloadContext
*sv
,
43 AVStream
*st
, AVPacket
*pkt
,
45 const uint8_t *buf
, int len
, uint16_t seq
,
48 int config_packet
, start_packet
, end_packet
;
51 return AVERROR_INVALIDDATA
;
53 config_packet
= buf
[0] & 0x40;
54 start_packet
= buf
[0] & 0x20;
55 end_packet
= buf
[0] & 0x10;
56 buf
+= 2; // ignore buf[1]
61 av_freep(&st
->codec
->extradata
);
62 st
->codec
->extradata_size
= 0;
64 if (len
< 2 || ff_alloc_extradata(st
->codec
, len
+ 8))
65 return AVERROR_INVALIDDATA
;
67 memcpy(st
->codec
->extradata
, "SEQH", 4);
68 AV_WB32(st
->codec
->extradata
+ 4, len
);
69 memcpy(st
->codec
->extradata
+ 8, buf
, len
);
71 /* We set codec_id to AV_CODEC_ID_NONE initially to
72 * delay decoder initialization since extradata is
73 * carried within the RTP stream, not SDP. Here,
74 * by setting codec_id to AV_CODEC_ID_SVQ3, we are signalling
75 * to the decoder that it is OK to initialize. */
76 st
->codec
->codec_id
= AV_CODEC_ID_SVQ3
;
78 return AVERROR(EAGAIN
);
86 avio_close_dyn_buf(sv
->pktbuf
, &tmp
);
89 if ((res
= avio_open_dyn_buf(&sv
->pktbuf
)) < 0)
91 sv
->timestamp
= *timestamp
;
95 return AVERROR_INVALIDDATA
;
97 avio_write(sv
->pktbuf
, buf
, len
);
100 int ret
= ff_rtp_finalize_packet(pkt
, &sv
->pktbuf
, st
->index
);
104 *timestamp
= sv
->timestamp
;
108 return AVERROR(EAGAIN
);
111 static PayloadContext
*svq3_extradata_new(void)
113 return av_mallocz(sizeof(PayloadContext
));
116 static void svq3_extradata_free(PayloadContext
*sv
)
120 avio_close_dyn_buf(sv
->pktbuf
, &buf
);
126 RTPDynamicProtocolHandler ff_svq3_dynamic_handler
= {
127 .enc_name
= "X-SV3V-ES",
128 .codec_type
= AVMEDIA_TYPE_VIDEO
,
129 .codec_id
= AV_CODEC_ID_NONE
, // see if (config_packet) above
130 .alloc
= svq3_extradata_new
,
131 .free
= svq3_extradata_free
,
132 .parse_packet
= svq3_parse_packet
,