FFmpeg
rtpenc_vp9.c
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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 
27 {
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 }
int max_payload_size
Definition: rtpenc.h:38
#define RTP_VP9_DESC_REQUIRED_SIZE
Definition: rtpenc_vp9.c:24
Format I/O context.
Definition: avformat.h:1358
uint8_t
uint8_t * buf
Definition: rtpenc.h:49
ptrdiff_t size
Definition: opengl_enc.c:100
#define FFMIN(a, b)
Definition: common.h:96
void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m)
Definition: rtpenc.c:332
AVFormatContext * ctx
Definition: movenc.c:48
uint32_t cur_timestamp
Definition: rtpenc.h:37
void ff_rtp_send_vp9(AVFormatContext *ctx, const uint8_t *buf, int size)
Definition: rtpenc_vp9.c:26
void * buf
Definition: avisynth_c.h:766
uint8_t * buf_ptr
Definition: rtpenc.h:50
uint32_t timestamp
Definition: rtpenc.h:35
int len
void * priv_data
Format private data.
Definition: avformat.h:1386
AVFormatContext * rtp_ctx
Definition: rtpenc_mpegts.c:28