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ffmpeg / libavformat / rtpenc_vp8.c @ 56a10009

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/*
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 * RTP VP8 Packetizer
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 * Copyright (c) 2010 Josh Allmann
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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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 * Libav 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 Libav; 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 "rtpenc.h"
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/* Based on a draft spec for VP8 RTP.
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 * ( http://www.webmproject.org/code/specs/rtp/ ) */
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void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size)
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{
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    RTPMuxContext *s = s1->priv_data;
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    int len, max_packet_size;
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    s->buf_ptr      = s->buf;
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    s->timestamp    = s->cur_timestamp;
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    max_packet_size = s->max_payload_size - 1; // minus one for header byte
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    *s->buf_ptr++ = 1; // 0b1 indicates start of frame
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    while (size > 0) {
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        len = FFMIN(size, max_packet_size);
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        memcpy(s->buf_ptr, buf, len);
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        ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is last packet in frame
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        size         -= len;
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        buf          += len;
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        s->buf_ptr    = s->buf;
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        *s->buf_ptr++ = 0; // payload descriptor
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    }
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}