2 * copyright (c) 2007 Luca Abeni
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "rtp_internal.h"
25 #define MAX_FRAMES_PER_PACKET (s->max_frames_per_packet ? s->max_frames_per_packet : 5)
26 #define MAX_AU_HEADERS_SIZE (2 + 2 * MAX_FRAMES_PER_PACKET)
28 void ff_rtp_send_aac(AVFormatContext
*s1
, const uint8_t *buff
, int size
)
30 RTPDemuxContext
*s
= s1
->priv_data
;
31 int len
, max_packet_size
;
34 /* skip ADTS header, if present */
35 if ((s1
->streams
[0]->codec
->extradata_size
) == 0) {
39 max_packet_size
= s
->max_payload_size
- MAX_AU_HEADERS_SIZE
;
41 /* test if the packet must be sent */
42 len
= (s
->buf_ptr
- s
->buf
);
43 if ((s
->read_buf_index
== MAX_FRAMES_PER_PACKET
) || (len
&& (len
+ size
) > max_packet_size
)) {
44 int au_size
= s
->read_buf_index
* 2;
46 p
= s
->buf
+ MAX_AU_HEADERS_SIZE
- au_size
- 2;
48 memmove(p
+ 2, s
->buf
+ 2, au_size
);
50 /* Write the AU header size */
51 p
[0] = ((au_size
* 8) & 0xFF) >> 8;
52 p
[1] = (au_size
* 8) & 0xFF;
54 ff_rtp_send_data(s1
, p
, s
->buf_ptr
- p
, 1);
56 s
->read_buf_index
= 0;
58 if (s
->read_buf_index
== 0) {
59 s
->buf_ptr
= s
->buf
+ MAX_AU_HEADERS_SIZE
;
60 s
->timestamp
= s
->cur_timestamp
;
63 if (size
< max_packet_size
) {
64 p
= s
->buf
+ s
->read_buf_index
++ * 2 + 2;
66 *p
= (size
& 0x1F) << 3;
67 memcpy(s
->buf_ptr
, buff
, size
);
70 if (s
->buf_ptr
!= s
->buf
+ MAX_AU_HEADERS_SIZE
) {
71 av_log(s1
, AV_LOG_ERROR
, "Strange...\n");
74 max_packet_size
= s
->max_payload_size
- 4;
79 len
= FFMIN(size
, max_packet_size
);
81 p
[3] = (size
& 0x1F) << 3;
82 memcpy(p
+ 4, buff
, len
);
83 ff_rtp_send_data(s1
, p
, len
+ 4, len
== size
);