From 50a4d5cfc6749932347ee38c25b5040aea4b13a0 Mon Sep 17 00:00:00 2001 From: ThomasVolkert Date: Sat, 23 Aug 2014 21:25:39 +0200 Subject: Add support for H.261 RTP payload format (RFC 4587) --- libavformat/rtpenc_h261.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 libavformat/rtpenc_h261.c (limited to 'libavformat/rtpenc_h261.c') diff --git a/libavformat/rtpenc_h261.c b/libavformat/rtpenc_h261.c new file mode 100644 index 0000000000..6f63703f0a --- /dev/null +++ b/libavformat/rtpenc_h261.c @@ -0,0 +1,57 @@ +/* + * RTP packetization for H.261 video (RFC 4587) + * Copyright (c) 2014 Thomas Volkert + * + * 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; + } +} -- cgit v1.2.3