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