Add some const, fixes warnings:
[libav.git] / libavformat / rtpenc_h264.c
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1/*
2 * RTP packetization for H.264 (RFC3984)
3 * Copyright (c) 2008 Luca Abeni.
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/**
23 * @file rtpenc_h264.c
24 * @brief H.264 packetization
25 * @author Luca Abeni <lucabe72@email.it>
26 */
27
28#include "avformat.h"
29#include "avc.h"
30#include "rtp_h264.h"
31
32static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
33{
34 RTPDemuxContext *s = s1->priv_data;
35
36 av_log(s1, AV_LOG_DEBUG, "Sending NAL %x of len %d M=%d\n", buf[0] & 0x1F, size, last);
37 if (size <= s->max_payload_size) {
38 ff_rtp_send_data(s1, buf, size, last);
39 } else {
40 uint8_t type = buf[0] & 0x1F;
41 uint8_t nri = buf[0] & 0x60;
42
43 av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
44 s->buf[0] = 28; /* FU Indicator; Type = 28 ---> FU-A */
45 s->buf[0] |= nri;
46 s->buf[1] = type;
47 s->buf[1] |= 1 << 7;
48 buf += 1;
49 size -= 1;
50 while (size + 2 > s->max_payload_size) {
51 memcpy(&s->buf[2], buf, s->max_payload_size - 2);
52 ff_rtp_send_data(s1, s->buf, s->max_payload_size, 0);
53 buf += s->max_payload_size - 2;
54 size -= s->max_payload_size - 2;
55 s->buf[1] &= ~(1 << 7);
56 }
57 s->buf[1] |= 1 << 6;
58 memcpy(&s->buf[2], buf, size);
59 ff_rtp_send_data(s1, s->buf, size + 2, 1);
60 }
61}
62
a56dcc57 63void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size)
f79bfe48 64{
a56dcc57 65 const uint8_t *r;
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66 RTPDemuxContext *s = s1->priv_data;
67
68 s->timestamp = s->cur_timestamp;
69 r = ff_avc_find_startcode(buf1, buf1 + size);
70 while (r < buf1 + size) {
a56dcc57 71 const uint8_t *r1;
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72
73 while(!*(r++));
74 r1 = ff_avc_find_startcode(r, buf1 + size);
75 nal_send(s1, r, r1 - r, (r1 == buf1 + size));
76 r = r1;
77 }
78}