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/*
* 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.
*
* Libav 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 Libav; 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]->codec->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;
}
}
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