1 /*
2 * RTP packetizer for VP9 payload format (draft version 02) - experimental
3 * Copyright (c) 2016 Thomas Volkert <thomas@netzeal.de>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #include "rtpenc.h"
23
24 #define RTP_VP9_DESC_REQUIRED_SIZE 1
25
ff_rtp_send_vp9(AVFormatContext * ctx,const uint8_t * buf,int size)26 void ff_rtp_send_vp9(AVFormatContext *ctx, const uint8_t *buf, int size)
27 {
28 RTPMuxContext *rtp_ctx = ctx->priv_data;
29 int len;
30
31 rtp_ctx->timestamp = rtp_ctx->cur_timestamp;
32 rtp_ctx->buf_ptr = rtp_ctx->buf;
33
34 /* mark the first fragment */
35 *rtp_ctx->buf_ptr++ = 0x08;
36
37 while (size > 0) {
38 len = FFMIN(size, rtp_ctx->max_payload_size - RTP_VP9_DESC_REQUIRED_SIZE);
39
40 if (len == size) {
41 /* mark the last fragment */
42 rtp_ctx->buf[0] |= 0x04;
43 }
44
45 memcpy(rtp_ctx->buf_ptr, buf, len);
46 ff_rtp_send_data(ctx, rtp_ctx->buf, len + RTP_VP9_DESC_REQUIRED_SIZE, size == len);
47
48 size -= len;
49 buf += len;
50
51 /* clear the end bit */
52 rtp_ctx->buf[0] &= ~0x08;
53 }
54 }
55