blob: 172ab21f1eb4ddb0ab8a180829e22a8289ded4db
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 | |
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 |