1/*
2 * RTP VP8 Packetizer
3 * Copyright (c) 2010 Josh Allmann
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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.
11 *
12 * Libav 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.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "rtpenc.h"
23
24/* Based on a draft spec for VP8 RTP.
25 * ( http://www.webmproject.org/code/specs/rtp/ ) */
26void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size)
27{
28    RTPMuxContext *s = s1->priv_data;
29    int len, max_packet_size;
30
31    s->buf_ptr      = s->buf;
32    s->timestamp    = s->cur_timestamp;
33    max_packet_size = s->max_payload_size - 1; // minus one for header byte
34
35    *s->buf_ptr++ = 1; // 0b1 indicates start of frame
36    while (size > 0) {
37        len = FFMIN(size, max_packet_size);
38
39        memcpy(s->buf_ptr, buf, len);
40        ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is last packet in frame
41
42        size         -= len;
43        buf          += len;
44        s->buf_ptr    = s->buf;
45        *s->buf_ptr++ = 0; // payload descriptor
46    }
47}
48