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
24 #define MAX_FRAMES_PER_PACKET (s->max_frames_per_packet ? s->max_frames_per_packet : 5)
25 #define MAX_AU_HEADERS_SIZE (2 + 2 * MAX_FRAMES_PER_PACKET)
27 void ff_rtp_send_aac(AVFormatContext
*s1
, const uint8_t *buff
, int size
)
29 RTPMuxContext
*s
= s1
->priv_data
;
30 int len
, max_packet_size
;
33 /* skip ADTS header, if present */
34 if ((s1
->streams
[0]->codec
->extradata_size
) == 0) {
38 max_packet_size
= s
->max_payload_size
- MAX_AU_HEADERS_SIZE
;
40 /* test if the packet must be sent */
41 len
= (s
->buf_ptr
- s
->buf
);
42 if ((s
->num_frames
== MAX_FRAMES_PER_PACKET
) || (len
&& (len
+ size
) > max_packet_size
)) {
43 int au_size
= s
->num_frames
* 2;
45 p
= s
->buf
+ MAX_AU_HEADERS_SIZE
- au_size
- 2;
47 memmove(p
+ 2, s
->buf
+ 2, au_size
);
49 /* Write the AU header size */
50 p
[0] = ((au_size
* 8) & 0xFF) >> 8;
51 p
[1] = (au_size
* 8) & 0xFF;
53 ff_rtp_send_data(s1
, p
, s
->buf_ptr
- p
, 1);
57 if (s
->num_frames
== 0) {
58 s
->buf_ptr
= s
->buf
+ MAX_AU_HEADERS_SIZE
;
59 s
->timestamp
= s
->cur_timestamp
;
62 if (size
< max_packet_size
) {
63 p
= s
->buf
+ s
->num_frames
++ * 2 + 2;
65 *p
= (size
& 0x1F) << 3;
66 memcpy(s
->buf_ptr
, buff
, size
);
69 if (s
->buf_ptr
!= s
->buf
+ MAX_AU_HEADERS_SIZE
) {
70 av_log(s1
, AV_LOG_ERROR
, "Strange...\n");
73 max_packet_size
= s
->max_payload_size
- 4;
78 len
= FFMIN(size
, max_packet_size
);
80 p
[3] = (size
& 0x1F) << 3;
81 memcpy(p
+ 4, buff
, len
);
82 ff_rtp_send_data(s1
, p
, len
+ 4, len
== size
);