Implement RDTDemuxContext, which contains RDT-specific data (similar to

RTPDemuxContext for RTP) for these streams where the transport protocol
is RDT (as served by Realmedia servers).

Originally committed as revision 15544 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rdt.c

@@ -34,11 +34,42 @@
 #include "rm.h"
 #include "internal.h"
 
+struct RDTDemuxContext {
+    AVFormatContext *ic;
+    AVStream *st;
+    void *dynamic_protocol_context;
+    DynamicPayloadPacketHandlerProc parse_packet;
+    uint32_t prev_sn, prev_ts;
+};
+
+RDTDemuxContext *
+ff_rdt_parse_open(AVFormatContext *ic, AVStream *st,
+                  void *priv_data, RTPDynamicProtocolHandler *handler)
+{
+    RDTDemuxContext *s = av_mallocz(sizeof(RDTDemuxContext));
+    if (!s)
+        return NULL;
+
+    s->ic = ic;
+    s->st = st;
+    s->prev_sn = -1;
+    s->prev_ts = -1;
+    s->parse_packet = handler->parse_packet;
+    s->dynamic_protocol_context = priv_data;
+
+    return s;
+}
+
+void
+ff_rdt_parse_close(RDTDemuxContext *s)
+{
+    av_free(s);
+}
+
 struct PayloadContext {
     AVFormatContext *rmctx;
     uint8_t *mlti_data;
     unsigned int mlti_data_size;
-    uint32_t prev_sn, prev_ts;
     char buffer[RTP_MAX_PACKET_LENGTH + FF_INPUT_BUFFER_PADDING_SIZE];
 };
 
@@ -202,10 +233,9 @@ rdt_parse_packet (PayloadContext *rdt, AVStream *st,
 }
 
 int
-ff_rdt_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
+ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
                     const uint8_t *buf, int len)
 {
-    PayloadContext *rdt = s->dynamic_protocol_context;
     int seq, flags = 0, rule, sn;
     uint32_t timestamp;
     int rv= 0;
@@ -226,14 +256,13 @@ ff_rdt_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
     rv = ff_rdt_parse_header(buf, len, &sn, &seq, &rule, &timestamp);
     if (rv < 0)
         return rv;
-    if (!(rule & 1) && (sn != rdt->prev_sn || timestamp != rdt->prev_ts)) {
+    if (!(rule & 1) && (sn != s->prev_sn || timestamp != s->prev_ts)) {
         flags |= PKT_FLAG_KEY;
-        rdt->prev_sn = sn;
+        s->prev_sn = sn;
-        rdt->prev_ts = timestamp;
+        s->prev_ts = timestamp;
     }
     buf += rv;
     len -= rv;
-    s->seq = seq;
 
     rv = s->parse_packet(s->dynamic_protocol_context,
                          s->st, pkt, &timestamp, buf, len, flags);
@@ -250,7 +279,7 @@ ff_rdt_subscribe_rule (char *cmd, int size,
 }
 
 void
-ff_rdt_subscribe_rule2 (RTPDemuxContext *s, char *cmd, int size,
+ff_rdt_subscribe_rule2 (RDTDemuxContext *s, char *cmd, int size,
                         int stream_nr, int rule_nr)
 {
     PayloadContext *rdt = s->dynamic_protocol_context;
@@ -292,8 +321,6 @@ rdt_new_extradata (void)
     PayloadContext *rdt = av_mallocz(sizeof(PayloadContext));
 
     av_open_input_stream(&rdt->rmctx, NULL, "", &rdt_demuxer, NULL);
-    rdt->prev_ts = -1;
-    rdt->prev_sn = -1;
 
     return rdt;
 }

libavformat/rdt.h

@@ -22,6 +22,13 @@
 #ifndef AVFORMAT_RDT_H
 #define AVFORMAT_RDT_H
 
+typedef struct RDTDemuxContext RDTDemuxContext;
+
+RDTDemuxContext *ff_rdt_parse_open(AVFormatContext *ic, AVStream *st,
+                                   void *priv_data,
+                                   RTPDynamicProtocolHandler *handler);
+void ff_rdt_parse_close(RDTDemuxContext *s);
+
 /**
  * Calculate the response (RealChallenge2 in the RTSP header) to the
  * challenge (RealChallenge1 in the RTSP header from the Real/Helix
@@ -53,7 +60,7 @@ void av_register_rdt_dynamic_payload_handlers(void);
 void ff_rdt_subscribe_rule(char *cmd, int size,
                            int stream_nr, int rule_nr);
 // FIXME this will be removed ASAP
-void ff_rdt_subscribe_rule2(RTPDemuxContext *s, char *cmd, int size,
+void ff_rdt_subscribe_rule2(RDTDemuxContext *s, char *cmd, int size,
                             int stream_nr, int rule_nr);
 
 /**
@@ -74,7 +81,7 @@ int ff_rdt_parse_header(const uint8_t *buf, int len,
  * Parse RDT-style packet data (header + media data).
  * Usage similar to rtp_parse_packet().
  */
-int ff_rdt_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
+int ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
                         const uint8_t *buf, int len);
 
 #endif /* AVFORMAT_RDT_H */

libavformat/rtsp.c

@@ -873,8 +873,12 @@ static void rtsp_close_streams(RTSPState *rt)
     for(i=0;i<rt->nb_rtsp_streams;i++) {
         rtsp_st = rt->rtsp_streams[i];
         if (rtsp_st) {
-            if (rtsp_st->tx_ctx)
+            if (rtsp_st->tx_ctx) {
+                if (rt->transport == RTSP_TRANSPORT_RDT)
+                    ff_rdt_parse_close(rtsp_st->tx_ctx);
+                else
                 rtp_parse_close(rtsp_st->tx_ctx);
+            }
             if (rtsp_st->rtp_handle)
                 url_close(rtsp_st->rtp_handle);
             if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
@@ -887,6 +891,7 @@ static void rtsp_close_streams(RTSPState *rt)
 static int
 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
 {
+    RTSPState *rt = s->priv_data;
     AVStream *st = NULL;
 
     /* open the RTP context */
@@ -894,11 +899,17 @@ rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
         st = s->streams[rtsp_st->stream_index];
     if (!st)
         s->ctx_flags |= AVFMTCTX_NOHEADER;
+
+    if (rt->transport == RTSP_TRANSPORT_RDT)
+        rtsp_st->tx_ctx = ff_rdt_parse_open(s, st,
+                                            rtsp_st->dynamic_protocol_context,
+                                            rtsp_st->dynamic_handler);
+    else
     rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
 
     if (!rtsp_st->tx_ctx) {
          return AVERROR(ENOMEM);
-    } else {
+    } else if (rt->transport != RTSP_TRANSPORT_RDT) {
         if(rtsp_st->dynamic_handler) {
             rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
                                            rtsp_st->dynamic_protocol_context,