rtsp: Split out the RTSP demuxer functions to a separate, new file

Originally committed as revision 25601 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/Makefile

@@ -243,7 +243,7 @@ OBJS-$(CONFIG_RTPDEC)                    += rdt.o         \
                                             rtpdec_svq3.o \
                                             rtpdec_vp8.o  \
                                             rtpdec_xiph.o
-OBJS-$(CONFIG_RTSP_DEMUXER)              += rtsp.o httpauth.o
+OBJS-$(CONFIG_RTSP_DEMUXER)              += rtsp.o rtspdec.o httpauth.o
 OBJS-$(CONFIG_RTSP_MUXER)                += rtsp.o rtspenc.o httpauth.o \
                                             rtpenc_chain.o
 OBJS-$(CONFIG_SAP_DEMUXER)               += sapdec.o

libavformat/rtsp.h

@@ -468,10 +468,34 @@ void ff_rtsp_close_streams(AVFormatContext *s);
  */
 void ff_rtsp_close_connections(AVFormatContext *rt);
 
+/**
+ * Get the description of the stream and set up the RTSPStream child
+ * objects.
+ */
+int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply);
+
 /**
  * Announce the stream to the server and set up the RTSPStream child
  * objects for each media stream.
  */
 int ff_rtsp_setup_output_streams(AVFormatContext *s, const char *addr);
 
+/**
+ * Parse a SDP description of streams by populating an RTSPState struct
+ * within the AVFormatContext.
+ */
+int ff_sdp_parse(AVFormatContext *s, const char *content);
+
+/**
+ * Receive one RTP packet from an TCP interleaved RTSP stream.
+ */
+int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
+                            uint8_t *buf, int buf_size);
+
+/**
+ * Receive one packet from the RTSPStreams set up in the AVFormatContext
+ * (which should contain a RTSPState struct as priv_data).
+ */
+int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt);
+
 #endif /* AVFORMAT_RTSP_H */