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/*
* RTP packetization for H.261 video (RFC 4587)
* Copyright (c) 2014 Thomas Volkert <thomas@homer-conferencing.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.
*
* FFmpeg 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 FFmpeg; 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_h261(AVFormatContext *s1, const uint8_t *frame_buf, int frame_size)
{
RTPMuxContext *rtp_ctx = s1->priv_data;
int processed_frame_size;
int last_packet_of_frame;
uint8_t *tmp_buf_ptr;
/* use the default 90 KHz time stamp */
rtp_ctx->timestamp = rtp_ctx->cur_timestamp;
/* continue as long as not all frame data is processed */
while (frame_size > 0) {
tmp_buf_ptr = rtp_ctx->buf;
*tmp_buf_ptr++ = 1; /* V=1 */
*tmp_buf_ptr++ = 0;
*tmp_buf_ptr++ = 0;
*tmp_buf_ptr++ = 0;
processed_frame_size = FFMIN(rtp_ctx->max_payload_size - 4, frame_size);
//XXX: parse the h.261 bitstream and improve frame splitting here
last_packet_of_frame = (processed_frame_size == frame_size);
memcpy(tmp_buf_ptr, frame_buf, processed_frame_size);
tmp_buf_ptr += processed_frame_size;
ff_rtp_send_data(s1, rtp_ctx->buf, tmp_buf_ptr - rtp_ctx->buf, last_packet_of_frame);
frame_buf += processed_frame_size;
frame_size -= processed_frame_size;
}
}
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