Add support for H.264 video in the RTP muxer

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

libavformat/Makefile

@@ -139,7 +139,12 @@ OBJS-$(CONFIG_RM_DEMUXER)                += rmdec.o
 OBJS-$(CONFIG_RM_MUXER)                  += rmenc.o
 OBJS-$(CONFIG_ROQ_DEMUXER)               += idroq.o
 OBJS-$(CONFIG_ROQ_MUXER)                 += raw.o
-OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o rtpenc.o rtp_mpv.o rtp_aac.o
+OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o         \
+                                            rtpenc.o      \
+                                            rtp_mpv.o     \
+                                            rtp_aac.o     \
+                                            rtpenc_h264.o \
+                                            avc.o
 OBJS-$(CONFIG_RTSP_DEMUXER)              += rtsp.o
 OBJS-$(CONFIG_SDP_DEMUXER)               += rtsp.o rtp.o rtpdec.o rtp_h264.o
 OBJS-$(CONFIG_SEGAFILM_DEMUXER)          += segafilm.o

libavformat/rtp_h264.h

@@ -25,5 +25,6 @@
 #include "rtp_internal.h"
 
 extern RTPDynamicProtocolHandler ff_h264_dynamic_handler;
+void ff_rtp_send_h264(AVFormatContext *s1, uint8_t *buf1, int size);
 
 #endif /* FFMPEG_RTP_H264_H */

libavformat/rtpenc.c

@@ -28,6 +28,7 @@
 #include "rtp_internal.h"
 #include "rtp_mpv.h"
 #include "rtp_aac.h"
+#include "rtp_h264.h"
 
 //#define DEBUG
 
@@ -334,6 +335,9 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
     case CODEC_ID_MPEG2TS:
         rtp_send_mpegts_raw(s1, buf1, size);
         break;
+    case CODEC_ID_H264:
+        ff_rtp_send_h264(s1, buf1, size);
+        break;
     default:
         /* better than nothing : send the codec raw data */
         rtp_send_raw(s1, buf1, size);

libavformat/rtpenc_h264.c

+/*
+ * 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;
+    }
+}