Add RTP packetization of VP8

Patch by Josh Allmann, joshua dot allmann at gmail

Originally committed as revision 24797 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 47 insertions, 0 deletions

diff --git a/libavformat/rtpenc_vp8.c b/libavformat/rtpenc_vp8.c
new file mode 100644
index 0000000000..e865514cef
--- /dev/null
+++ b/libavformat/rtpenc_vp8.c
@@ -0,0 +1,47 @@
+/*
+ * RTP VP8 Packetizer
+ * Copyright (c) 2010 Josh Allmann
+ *
+ * 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 "rtpenc.h"
+
+/* Based on a draft spec for VP8 RTP.
+ * ( http://www.webmproject.org/code/specs/rtp/ ) */
+void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size)
+{
+    RTPMuxContext *s = s1->priv_data;
+    int len, max_packet_size;
+
+    s->buf_ptr      = s->buf;
+    s->timestamp    = s->cur_timestamp;
+    max_packet_size = s->max_payload_size - 1; // minus one for header byte
+
+    *s->buf_ptr++ = 1; // 0b1 indicates start of frame
+    while (size > 0) {
+        len = FFMIN(size, max_packet_size);
+
+        memcpy(s->buf_ptr, buf, len);
+        ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is last packet in frame
+
+        size         -= len;
+        buf          += len;
+        s->buf_ptr    = s->buf;
+        *s->buf_ptr++ = 0; // payload descriptor
+    }
+}