rtsp: Move rtsp_setup_output_streams into rtspenc.c

Originally committed as revision 25600 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 67 insertions, 0 deletions

diff --git a/libavformat/rtspenc.c b/libavformat/rtspenc.c
index 9a9fa5a08b..007014ef1c 100644
--- a/libavformat/rtspenc.c
+++ b/libavformat/rtspenc.c
@@ -29,6 +29,73 @@
 #include "rtsp.h"
 #include "internal.h"
 #include "libavutil/intreadwrite.h"
+#include "libavutil/avstring.h"
+
+#define SDP_MAX_SIZE 16384
+
+int ff_rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
+{
+    RTSPState *rt = s->priv_data;
+    RTSPMessageHeader reply1, *reply = &reply1;
+    int i;
+    char *sdp;
+    AVFormatContext sdp_ctx, *ctx_array[1];
+
+    s->start_time_realtime = av_gettime();
+
+    /* Announce the stream */
+    sdp = av_mallocz(SDP_MAX_SIZE);
+    if (sdp == NULL)
+        return AVERROR(ENOMEM);
+    /* We create the SDP based on the RTSP AVFormatContext where we
+     * aren't allowed to change the filename field. (We create the SDP
+     * based on the RTSP context since the contexts for the RTP streams
+     * don't exist yet.) In order to specify a custom URL with the actual
+     * peer IP instead of the originally specified hostname, we create
+     * a temporary copy of the AVFormatContext, where the custom URL is set.
+     *
+     * FIXME: Create the SDP without copying the AVFormatContext.
+     * This either requires setting up the RTP stream AVFormatContexts
+     * already here (complicating things immensely) or getting a more
+     * flexible SDP creation interface.
+     */
+    sdp_ctx = *s;
+    ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
+                "rtsp", NULL, addr, -1, NULL);
+    ctx_array[0] = &sdp_ctx;
+    if (avf_sdp_create(ctx_array, 1, sdp, SDP_MAX_SIZE)) {
+        av_free(sdp);
+        return AVERROR_INVALIDDATA;
+    }
+    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
+    ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
+                                  "Content-Type: application/sdp\r\n",
+                                  reply, NULL, sdp, strlen(sdp));
+    av_free(sdp);
+    if (reply->status_code != RTSP_STATUS_OK)
+        return AVERROR_INVALIDDATA;
+
+    /* Set up the RTSPStreams for each AVStream */
+    for (i = 0; i < s->nb_streams; i++) {
+        RTSPStream *rtsp_st;
+        AVStream *st = s->streams[i];
+
+        rtsp_st = av_mallocz(sizeof(RTSPStream));
+        if (!rtsp_st)
+            return AVERROR(ENOMEM);
+        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
+
+        st->priv_data = rtsp_st;
+        rtsp_st->stream_index = i;
+
+        av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
+        /* Note, this must match the relative uri set in the sdp content */
+        av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
+                    "/streamid=%d", i);
+    }
+
+    return 0;
+}
 
 static int rtsp_write_record(AVFormatContext *s)
 {