/* * 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; } }