| /* |
| * 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; |
| } |
| } |