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0832122880
This is enabled with an AVOption on the RTP muxer. The SDP generator looks for a latm flag in the rtpflags field. Signed-off-by: Martin Storsjö <martin@martin.st>
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*
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* RTP Packetization of MPEG-4 Audio (RFC 3016)
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* Copyright (c) 2011 Juan Carlos Rodriguez <ing.juancarlosrodriguez@hotmail.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "rtpenc.h"
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void ff_rtp_send_latm(AVFormatContext *s1, const uint8_t *buff, int size)
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{
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/* MP4A-LATM
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* The RTP payload format specification is described in RFC 3016
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* The encoding specifications are provided in ISO/IEC 14496-3 */
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RTPMuxContext *s = s1->priv_data;
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int header_size;
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int offset = 0;
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int len = 0;
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/* skip ADTS header, if present */
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if ((s1->streams[0]->codec->extradata_size) == 0) {
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size -= 7;
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buff += 7;
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}
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/* PayloadLengthInfo() */
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header_size = size/0xFF + 1;
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memset(s->buf, 0xFF, header_size - 1);
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s->buf[header_size - 1] = size % 0xFF;
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s->timestamp = s->cur_timestamp;
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/* PayloadMux() */
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while (size > 0) {
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len = FFMIN(size, s->max_payload_size - (!offset ? header_size : 0));
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size -= len;
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if (!offset) {
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memcpy(s->buf + header_size, buff, len);
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ff_rtp_send_data(s1, s->buf, header_size + len, !size);
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} else {
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ff_rtp_send_data(s1, buff + offset, len, !size);
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}
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offset += len;
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}
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}
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