Browse code

Add support for H.264 video in the RTP muxer

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

Luca Abeni authored on 2008/01/21 23:01:57
Showing 4 changed files
... ...
@@ -139,7 +139,12 @@ OBJS-$(CONFIG_RM_DEMUXER)                += rmdec.o
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 OBJS-$(CONFIG_RM_MUXER)                  += rmenc.o
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 OBJS-$(CONFIG_ROQ_DEMUXER)               += idroq.o
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 OBJS-$(CONFIG_ROQ_MUXER)                 += raw.o
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-OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o rtpenc.o rtp_mpv.o rtp_aac.o
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+OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o         \
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+                                            rtpenc.o      \
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+                                            rtp_mpv.o     \
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+                                            rtp_aac.o     \
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+                                            rtpenc_h264.o \
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+                                            avc.o
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 OBJS-$(CONFIG_RTSP_DEMUXER)              += rtsp.o
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 OBJS-$(CONFIG_SDP_DEMUXER)               += rtsp.o rtp.o rtpdec.o rtp_h264.o
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 OBJS-$(CONFIG_SEGAFILM_DEMUXER)          += segafilm.o
... ...
@@ -25,5 +25,6 @@
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 #include "rtp_internal.h"
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 extern RTPDynamicProtocolHandler ff_h264_dynamic_handler;
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+void ff_rtp_send_h264(AVFormatContext *s1, uint8_t *buf1, int size);
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 #endif /* FFMPEG_RTP_H264_H */
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@@ -28,6 +28,7 @@
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 #include "rtp_internal.h"
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 #include "rtp_mpv.h"
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 #include "rtp_aac.h"
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+#include "rtp_h264.h"
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 //#define DEBUG
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... ...
@@ -334,6 +335,9 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
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     case CODEC_ID_MPEG2TS:
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         rtp_send_mpegts_raw(s1, buf1, size);
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         break;
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+    case CODEC_ID_H264:
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+        ff_rtp_send_h264(s1, buf1, size);
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+        break;
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     default:
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         /* better than nothing : send the codec raw data */
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         rtp_send_raw(s1, buf1, size);
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new file mode 100644
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@@ -0,0 +1,78 @@
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+/*
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+ * RTP packetization for H.264 (RFC3984)
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+ * Copyright (c) 2008 Luca Abeni.
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+/**
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+ * @file rtpenc_h264.c
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+ * @brief H.264 packetization
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+ * @author Luca Abeni <lucabe72@email.it>
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+ */
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+
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+#include "avformat.h"
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+#include "avc.h"
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+#include "rtp_h264.h"
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+
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+static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
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+{
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+    RTPDemuxContext *s = s1->priv_data;
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+
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+    av_log(s1, AV_LOG_DEBUG, "Sending NAL %x of len %d M=%d\n", buf[0] & 0x1F, size, last);
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+    if (size <= s->max_payload_size) {
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+        ff_rtp_send_data(s1, buf, size, last);
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+    } else {
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+        uint8_t type = buf[0] & 0x1F;
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+        uint8_t nri = buf[0] & 0x60;
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+
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+        av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
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+        s->buf[0] = 28;        /* FU Indicator; Type = 28 ---> FU-A */
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+        s->buf[0] |= nri;
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+        s->buf[1] = type;
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+        s->buf[1] |= 1 << 7;
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+        buf += 1;
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+        size -= 1;
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+        while (size + 2 > s->max_payload_size) {
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+            memcpy(&s->buf[2], buf, s->max_payload_size - 2);
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+            ff_rtp_send_data(s1, s->buf, s->max_payload_size, 0);
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+            buf += s->max_payload_size - 2;
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+            size -= s->max_payload_size - 2;
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+            s->buf[1] &= ~(1 << 7);
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+        }
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+        s->buf[1] |= 1 << 6;
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+        memcpy(&s->buf[2], buf, size);
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+        ff_rtp_send_data(s1, s->buf, size + 2, 1);
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+    }
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+}
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+
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+void ff_rtp_send_h264(AVFormatContext *s1, uint8_t *buf1, int size)
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+{
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+    uint8_t *r;
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+    RTPDemuxContext *s = s1->priv_data;
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+
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+    s->timestamp = s->cur_timestamp;
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+    r = ff_avc_find_startcode(buf1, buf1 + size);
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+    while (r < buf1 + size) {
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+        uint8_t *r1;
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+
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+        while(!*(r++));
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+        r1 = ff_avc_find_startcode(r, buf1 + size);
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+        nal_send(s1, r, r1 - r, (r1 == buf1 + size));
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+        r = r1;
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+    }
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+}