ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/rtpenc_mpegts.c

@@ -0,0 +1,155 @@
+/*
+ * RTP/mpegts muxer
+ * Copyright (c) 2011 Martin Storsjo
+ *
+ * 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 "libavutil/mathematics.h"
+#include "avformat.h"
+#include "avio_internal.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) {
+        av_write_trailer(chain->mpegts_ctx);
+        ffio_free_dyn_buf(&chain->mpegts_ctx->pb);
+        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;
+    rtp_ctx->pb = s->pb;
+    if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0)
+        goto fail;
+    chain->rtp_ctx = rtp_ctx;
+
+    return 0;
+
+fail:
+    if (mpegts_ctx) {
+        ffio_free_dyn_buf(&mpegts_ctx->pb);
+        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,
+};