1/* 2 * RTP VP8 Packetizer 3 * Copyright (c) 2010 Josh Allmann 4 * 5 * This file is part of Libav. 6 * 7 * Libav is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * Libav is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "rtpenc.h" 23 24/* Based on a draft spec for VP8 RTP. 25 * ( http://www.webmproject.org/code/specs/rtp/ ) */ 26void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size) 27{ 28 RTPMuxContext *s = s1->priv_data; 29 int len, max_packet_size; 30 31 s->buf_ptr = s->buf; 32 s->timestamp = s->cur_timestamp; 33 max_packet_size = s->max_payload_size - 1; // minus one for header byte 34 35 *s->buf_ptr++ = 1; // 0b1 indicates start of frame 36 while (size > 0) { 37 len = FFMIN(size, max_packet_size); 38 39 memcpy(s->buf_ptr, buf, len); 40 ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is last packet in frame 41 42 size -= len; 43 buf += len; 44 s->buf_ptr = s->buf; 45 *s->buf_ptr++ = 0; // payload descriptor 46 } 47} 48