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-rw-r--r--libavformat/rtpenc_h261.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/libavformat/rtpenc_h261.c b/libavformat/rtpenc_h261.c
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+++ b/libavformat/rtpenc_h261.c
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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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