Since this structurally is quite different from normal RTP
(multiple streams are muxed into one single mpegts stream,
which is packetized into one single RTP session), it is kept
as a separate muxer.
This is one out of two alternative ways of achieving the same.
This one is probably more straightforward, but requires using
a different muxer name.
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/rtpenc_mpegts.c | 165 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 167 insertions(+)
create mode 100644 libavformat/rtpenc_mpegts.c
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 035eb72..f656681 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -286,6 +286,7 @@ OBJS-$(CONFIG_ROQ_MUXER) += idroqenc.o
rawenc.o
OBJS-$(CONFIG_RSO_DEMUXER) += rsodec.o rso.o pcm.o
OBJS-$(CONFIG_RSO_MUXER) += rsoenc.o rso.o
OBJS-$(CONFIG_RPL_DEMUXER) += rpl.o
+OBJS-$(CONFIG_RTP_MPEGTS_MUXER) += rtpenc_mpegts.o
OBJS-$(CONFIG_RTP_MUXER) += rtp.o \
rtpenc_aac.o \
rtpenc_latm.o \
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 7868e3e..cb22ae3 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -212,6 +212,7 @@ void av_register_all(void)
REGISTER_DEMUXER (RPL, rpl);
REGISTER_MUXDEMUX(RSO, rso);
REGISTER_MUXDEMUX(RTP, rtp);
+ REGISTER_MUXER (RTP_MPEGTS, rtp_mpegts);
REGISTER_MUXDEMUX(RTSP, rtsp);
REGISTER_MUXDEMUX(SAP, sap);
REGISTER_DEMUXER (SDP, sdp);
diff --git a/libavformat/rtpenc_mpegts.c b/libavformat/rtpenc_mpegts.c
new file mode 100644
index 0000000..cdc91b7
--- /dev/null
+++ b/libavformat/rtpenc_mpegts.c
@@ -0,0 +1,165 @@
+/*
+ * RTP/mpegts muxer
+ * Copyright (c) 2011 Martin Storsjo
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avformat.h"
+#include "libavutil/mathematics.h"
+
+struct MuxChain {
+ AVFormatContext *mpegts_ctx;
+ AVFormatContext *rtp_ctx;
+};
+
+static int rtp_mpegts_write_close(AVFormatContext *s)
+{
+ struct MuxChain *chain = s->priv_data;
+
+ if (chain->mpegts_ctx) {
+ if (!chain->mpegts_ctx->pb)
+ avio_open_dyn_buf(&chain->mpegts_ctx->pb);
+ if (chain->mpegts_ctx->pb) {
+ uint8_t *buf;
+ av_write_trailer(chain->mpegts_ctx);
+ avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
+ av_free(buf);
+ }
+ avformat_free_context(chain->mpegts_ctx);
+ }
+ if (chain->rtp_ctx) {
+ av_write_trailer(chain->rtp_ctx);
+ avformat_free_context(chain->rtp_ctx);
+ }
+ return 0;
+}
+
+static int rtp_mpegts_write_header(AVFormatContext *s)
+{
+ struct MuxChain *chain = s->priv_data;
+ AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL;
+ AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL);
+ AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
+ int i, ret = AVERROR(ENOMEM);
+ AVStream *st;
+
+ if (!mpegts_format || !rtp_format)
+ return AVERROR(ENOSYS);
+ mpegts_ctx = avformat_alloc_context();
+ if (!mpegts_ctx)
+ return AVERROR(ENOMEM);
+ mpegts_ctx->oformat = mpegts_format;
+ mpegts_ctx->max_delay = s->max_delay;
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream* st = avformat_new_stream(mpegts_ctx, NULL);
+ if (!st)
+ goto fail;
+ st->time_base = s->streams[i]->time_base;
+ st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
+ avcodec_copy_context(st->codec, s->streams[i]->codec);
+ }
+ if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0)
+ goto fail;
+ if ((ret = avformat_write_header(mpegts_ctx, NULL)) < 0)
+ goto fail;
+ for (i = 0; i < s->nb_streams; i++)
+ s->streams[i]->time_base = mpegts_ctx->streams[i]->time_base;
+
+ chain->mpegts_ctx = mpegts_ctx;
+ mpegts_ctx = NULL;
+
+ rtp_ctx = avformat_alloc_context();
+ if (!rtp_ctx) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ rtp_ctx->oformat = rtp_format;
+ st = avformat_new_stream(rtp_ctx, NULL);
+ st->time_base.num = 1;
+ st->time_base.den = 90000;
+ st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
+ chain->rtp_ctx = rtp_ctx;
+ rtp_ctx->pb = s->pb;
+ if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0)
+ goto fail;
+ rtp_ctx = NULL;
+
+ return 0;
+
+fail:
+ if (mpegts_ctx) {
+ if (mpegts_ctx->pb) {
+ uint8_t *buf;
+ avio_close_dyn_buf(mpegts_ctx->pb, &buf);
+ av_free(buf);
+ }
+ avformat_free_context(mpegts_ctx);
+ }
+ if (rtp_ctx)
+ avformat_free_context(rtp_ctx);
+ rtp_mpegts_write_close(s);
+ return ret;
+}
+
+static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ struct MuxChain *chain = s->priv_data;
+ int ret = 0, size;
+ uint8_t *buf;
+ AVPacket local_pkt;
+
+ if (!chain->mpegts_ctx->pb) {
+ if ((ret = avio_open_dyn_buf(&chain->mpegts_ctx->pb)) < 0)
+ return ret;
+ }
+ if ((ret = av_write_frame(chain->mpegts_ctx, pkt)) < 0)
+ return ret;
+ size = avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
+ chain->mpegts_ctx->pb = NULL;
+ if (size == 0) {
+ av_free(buf);
+ return 0;
+ }
+ av_init_packet(&local_pkt);
+ local_pkt.data = buf;
+ local_pkt.size = size;
+ local_pkt.stream_index = 0;
+ if (pkt->pts != AV_NOPTS_VALUE)
+ local_pkt.pts = av_rescale_q(pkt->pts,
+ s->streams[pkt->stream_index]->time_base,
+ chain->rtp_ctx->streams[0]->time_base);
+ if (pkt->dts != AV_NOPTS_VALUE)
+ local_pkt.dts = av_rescale_q(pkt->dts,
+ s->streams[pkt->stream_index]->time_base,
+ chain->rtp_ctx->streams[0]->time_base);
+ ret = av_write_frame(chain->rtp_ctx, &local_pkt);
+ av_free(buf);
+
+ return ret;
+}
+
+AVOutputFormat ff_rtp_mpegts_muxer = {
+ .name = "rtp_mpegts",
+ .long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"),
+ .priv_data_size = sizeof(struct MuxChain),
+ .audio_codec = AV_CODEC_ID_AAC,
+ .video_codec = AV_CODEC_ID_MPEG4,
+ .write_header = rtp_mpegts_write_header,
+ .write_packet = rtp_mpegts_write_packet,
+ .write_trailer = rtp_mpegts_write_close,
+};
--
1.9.3 (Apple Git-50)
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
