rtpenc: packetizer for VP9 RTP payload format (draft v2)

1 files changed, 54 insertions, 0 deletions

diff --git a/libavformat/rtpenc_vp9.c b/libavformat/rtpenc_vp9.c
new file mode 100644
index 0000000000..172ab21f1e
--- /dev/null
+++ b/libavformat/rtpenc_vp9.c
@@ -0,0 +1,54 @@
+/*
+ * RTP packetizer for VP9 payload format (draft version 02) - experimental
+ * Copyright (c) 2016 Thomas Volkert <thomas@netzeal.de>
+ *
+ * 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"
+
+#define RTP_VP9_DESC_REQUIRED_SIZE 1
+
+void ff_rtp_send_vp9(AVFormatContext *ctx, const uint8_t *buf, int size)
+{
+    RTPMuxContext *rtp_ctx = ctx->priv_data;
+    int len;
+
+    rtp_ctx->timestamp  = rtp_ctx->cur_timestamp;
+    rtp_ctx->buf_ptr    = rtp_ctx->buf;
+
+    /* mark the first fragment */
+    *rtp_ctx->buf_ptr++ = 0x08;
+
+    while (size > 0) {
+        len = FFMIN(size, rtp_ctx->max_payload_size - RTP_VP9_DESC_REQUIRED_SIZE);
+
+        if (len == size) {
+            /* mark the last fragment */
+            rtp_ctx->buf[0] |= 0x04;
+        }
+
+        memcpy(rtp_ctx->buf_ptr, buf, len);
+        ff_rtp_send_data(ctx, rtp_ctx->buf, len + RTP_VP9_DESC_REQUIRED_SIZE, size == len);
+
+        size            -= len;
+        buf             += len;
+
+        /* clear the end bit */
+        rtp_ctx->buf[0] &= ~0x08;
+    }
+}