62 lines
2 KiB
C
62 lines
2 KiB
C
|
/*
|
||
|
|
* RTP Packetization of MPEG-4 Audio (RFC 3016)
|
||
|
|
* Copyright (c) 2011 Juan Carlos Rodriguez <ing.juancarlosrodriguez@hotmail.com>
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with FFmpeg; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "avformat.h"
|
||
|
|
#include "rtpenc.h"
|
||
|
|
|
||
|
|
void ff_rtp_send_latm(AVFormatContext *s1, const uint8_t *buff, int size)
|
||
|
|
{
|
||
|
|
/* MP4A-LATM
|
||
|
|
* The RTP payload format specification is described in RFC 3016
|
||
|
|
* The encoding specifications are provided in ISO/IEC 14496-3 */
|
||
|
|
|
||
|
|
RTPMuxContext *s = s1->priv_data;
|
||
|
|
int header_size;
|
||
|
|
int offset = 0;
|
||
|
|
int len = 0;
|
||
|
|
|
||
|
|
/* skip ADTS header, if present */
|
||
|
|
if ((s1->streams[0]->codecpar->extradata_size) == 0) {
|
||
|
|
size -= 7;
|
||
|
|
buff += 7;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* PayloadLengthInfo() */
|
||
|
|
header_size = size/0xFF + 1;
|
||
|
|
memset(s->buf, 0xFF, header_size - 1);
|
||
|
|
s->buf[header_size - 1] = size % 0xFF;
|
||
|
|
|
||
|
|
s->timestamp = s->cur_timestamp;
|
||
|
|
|
||
|
|
/* PayloadMux() */
|
||
|
|
while (size > 0) {
|
||
|
|
len = FFMIN(size, s->max_payload_size - (!offset ? header_size : 0));
|
||
|
|
size -= len;
|
||
|
|
if (!offset) {
|
||
|
|
memcpy(s->buf + header_size, buff, len);
|
||
|
|
ff_rtp_send_data(s1, s->buf, header_size + len, !size);
|
||
|
|
} else {
|
||
|
|
ff_rtp_send_data(s1, buff + offset, len, !size);
|
||
|
|
}
|
||
|
|
offset += len;
|
||
|
|
}
|
||
|
|
}
|