Add support for H.264 video in the RTP muxer

Originally committed as revision 11589 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 78 insertions, 0 deletions

diff --git a/libavformat/rtpenc_h264.c b/libavformat/rtpenc_h264.c
new file mode 100644
index 0000000000..cf054d752b
--- /dev/null
+++ b/libavformat/rtpenc_h264.c
@@ -0,0 +1,78 @@
+/*
+ * RTP packetization for H.264 (RFC3984)
+ * Copyright (c) 2008 Luca Abeni.
+ *
+ * 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
+ */
+
+/**
+ * @file rtpenc_h264.c
+ * @brief H.264 packetization
+ * @author Luca Abeni <lucabe72@email.it>
+ */
+
+#include "avformat.h"
+#include "avc.h"
+#include "rtp_h264.h"
+
+static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
+{
+    RTPDemuxContext *s = s1->priv_data;
+
+    av_log(s1, AV_LOG_DEBUG, "Sending NAL %x of len %d M=%d\n", buf[0] & 0x1F, size, last);
+    if (size <= s->max_payload_size) {
+        ff_rtp_send_data(s1, buf, size, last);
+    } else {
+        uint8_t type = buf[0] & 0x1F;
+        uint8_t nri = buf[0] & 0x60;
+
+        av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
+        s->buf[0] = 28;        /* FU Indicator; Type = 28 ---> FU-A */
+        s->buf[0] |= nri;
+        s->buf[1] = type;
+        s->buf[1] |= 1 << 7;
+        buf += 1;
+        size -= 1;
+        while (size + 2 > s->max_payload_size) {
+            memcpy(&s->buf[2], buf, s->max_payload_size - 2);
+            ff_rtp_send_data(s1, s->buf, s->max_payload_size, 0);
+            buf += s->max_payload_size - 2;
+            size -= s->max_payload_size - 2;
+            s->buf[1] &= ~(1 << 7);
+        }
+        s->buf[1] |= 1 << 6;
+        memcpy(&s->buf[2], buf, size);
+        ff_rtp_send_data(s1, s->buf, size + 2, 1);
+    }
+}
+
+void ff_rtp_send_h264(AVFormatContext *s1, uint8_t *buf1, int size)
+{
+    uint8_t *r;
+    RTPDemuxContext *s = s1->priv_data;
+
+    s->timestamp = s->cur_timestamp;
+    r = ff_avc_find_startcode(buf1, buf1 + size);
+    while (r < buf1 + size) {
+        uint8_t *r1;
+
+        while(!*(r++));
+        r1 = ff_avc_find_startcode(r, buf1 + size);
+        nal_send(s1, r, r1 - r, (r1 == buf1 + size));
+        r = r1;
+    }
+}