Split RTP sout into multiple pieces.
authorRémi Denis-Courmont <rem@videolan.org>
Thu, 23 Aug 2007 16:40:00 +0000 (16:40 +0000)
committerRémi Denis-Courmont <rem@videolan.org>
Thu, 23 Aug 2007 16:40:00 +0000 (16:40 +0000)
Even then rtp.c is quite big...

modules/stream_out/Modules.am
modules/stream_out/rtp.c
modules/stream_out/rtp.h [new file with mode: 0644]
modules/stream_out/rtsp.c [new file with mode: 0644]

index 74e9aef..7b85fc7 100644 (file)
@@ -6,7 +6,7 @@ SOURCES_stream_out_duplicate = duplicate.c
 SOURCES_stream_out_es = es.c
 SOURCES_stream_out_display = display.c
 SOURCES_stream_out_gather = gather.c
-SOURCES_stream_out_rtp = rtp.c
+SOURCES_stream_out_rtp = rtp.c rtp.h rtsp.c
 SOURCES_stream_out_switcher = switcher.c
 SOURCES_stream_out_bridge = bridge.c
 SOURCES_stream_out_mosaic_bridge = mosaic_bridge.c
index 92e34e7..b5e75b8 100644 (file)
@@ -41,6 +41,8 @@
 #include <vlc_charset.h>
 #include <vlc_strings.h>
 
+#include "rtp.h"
+
 /*****************************************************************************
  * Module descriptor
  *****************************************************************************/
@@ -156,22 +158,6 @@ static int               Del ( sout_stream_t *, sout_stream_id_t * );
 static int               Send( sout_stream_t *, sout_stream_id_t *,
                                block_t* );
 
-/* For unicast/interleaved streaming */
-typedef struct
-{
-    char    *psz_session;
-    int64_t i_last; /* for timeout */
-
-    /* is it in "play" state */
-    vlc_bool_t b_playing;
-
-    /* output (id-access) */
-    int               i_id;
-    sout_stream_id_t  **id;
-    int               i_access;
-    sout_access_out_t **access;
-} rtsp_client_t;
-
 struct sout_stream_sys_t
 {
     /* sdp */
@@ -231,45 +217,6 @@ struct sout_stream_sys_t
     rtsp_client_t    **rtsp;
 };
 
-typedef int (*pf_rtp_packetizer_t)( sout_stream_t *, sout_stream_id_t *,
-                                    block_t * );
-
-struct sout_stream_id_t
-{
-    sout_stream_t *p_stream;
-    /* rtp field */
-    uint8_t     i_payload_type;
-    uint16_t    i_sequence;
-    uint32_t    i_timestamp_start;
-    uint8_t     ssrc[4];
-
-    /* for sdp */
-    int         i_clock_rate;
-    char        *psz_rtpmap;
-    char        *psz_fmtp;
-    char        *psz_destination;
-    int         i_port;
-    int         i_cat;
-    int         i_bitrate;
-
-    /* Packetizer specific fields */
-    pf_rtp_packetizer_t pf_packetize;
-    int           i_mtu;
-
-    /* for sending the packets */
-    sout_access_out_t *p_access;
-
-    vlc_mutex_t       lock_rtsp;
-    int               i_rtsp_access;
-    sout_access_out_t **rtsp_access;
-
-    /* */
-    sout_input_t      *p_input;
-
-    /* RTSP url control */
-    httpd_url_t  *p_rtsp_url;
-};
-
 static int AccessOutGrabberWrite( sout_access_out_t *, block_t * );
 
 static void SDPHandleUrl( sout_stream_t *, char * );
@@ -277,17 +224,6 @@ static void SDPHandleUrl( sout_stream_t *, char * );
 static int SapSetup( sout_stream_t *p_stream );
 static int FileSetup( sout_stream_t *p_stream );
 static int HttpSetup( sout_stream_t *p_stream, vlc_url_t * );
-static int RtspSetup( sout_stream_t *p_stream, vlc_url_t * );
-
-static int  RtspCallback( httpd_callback_sys_t *, httpd_client_t *,
-                          httpd_message_t *, httpd_message_t * );
-static int  RtspCallbackId( httpd_callback_sys_t *, httpd_client_t *,
-                            httpd_message_t *, httpd_message_t * );
-
-
-static rtsp_client_t *RtspClientNew( sout_stream_t *, const char *psz_session );
-static rtsp_client_t *RtspClientGet( sout_stream_t *, const char *psz_session );
-static void           RtspClientDel( sout_stream_t *, rtsp_client_t * );
 
 /*****************************************************************************
  * Open:
@@ -760,7 +696,7 @@ static void SDPHandleUrl( sout_stream_t *p_stream, char *psz_url )
            a= charset: (normally charset should be UTF-8, this can be used to override s= and i=)
            a= x-plgroup: (missing)
            RTP packets need to get the correct src IP address  */
-static char *SDPGenerate( const sout_stream_t *p_stream,
+/*static*/ char *SDPGenerate( const sout_stream_t *p_stream,
                           const char *psz_destination, vlc_bool_t b_rtsp )
 {
     sout_stream_sys_t *p_sys = p_stream->p_sys;
@@ -1538,486 +1474,6 @@ static int  HttpCallback( httpd_file_sys_t *p_args,
     return VLC_SUCCESS;
 }
 
-/****************************************************************************
- * RTSP:
- ****************************************************************************/
-static rtsp_client_t *RtspClientNew( sout_stream_t *p_stream, const char *psz_session )
-{
-    rtsp_client_t *rtsp = malloc( sizeof( rtsp_client_t ));
-
-    rtsp->psz_session = strdup( psz_session );
-    rtsp->i_last = 0;
-    rtsp->b_playing = VLC_FALSE;
-    rtsp->i_id = 0;
-    rtsp->id = NULL;
-    rtsp->i_access = 0;
-    rtsp->access = NULL;
-
-    TAB_APPEND( p_stream->p_sys->i_rtsp, p_stream->p_sys->rtsp, rtsp );
-
-    return rtsp;
-}
-static rtsp_client_t *RtspClientGet( sout_stream_t *p_stream, const char *psz_session )
-{
-    int i;
-
-    if( !psz_session ) return NULL;
-
-    for( i = 0; i < p_stream->p_sys->i_rtsp; i++ )
-    {
-        if( !strcmp( p_stream->p_sys->rtsp[i]->psz_session, psz_session ) )
-        {
-            return p_stream->p_sys->rtsp[i];
-        }
-    }
-    return NULL;
-}
-
-static void RtspClientDel( sout_stream_t *p_stream, rtsp_client_t *rtsp )
-{
-    int i;
-    TAB_REMOVE( p_stream->p_sys->i_rtsp, p_stream->p_sys->rtsp, rtsp );
-
-    for( i = 0; i < rtsp->i_access; i++ )
-    {
-        sout_AccessOutDelete( rtsp->access[i] );
-    }
-    if( rtsp->id )     free( rtsp->id );
-    if( rtsp->access ) free( rtsp->access );
-
-    free( rtsp->psz_session );
-    free( rtsp );
-}
-
-static int RtspSetup( sout_stream_t *p_stream, vlc_url_t *url )
-{
-    sout_stream_sys_t *p_sys = p_stream->p_sys;
-
-    msg_Dbg( p_stream, "rtsp setup: %s : %d / %s\n", url->psz_host, url->i_port, url->psz_path );
-
-    p_sys->p_rtsp_host = httpd_HostNew( VLC_OBJECT(p_stream), url->psz_host, url->i_port > 0 ? url->i_port : 554 );
-    if( p_sys->p_rtsp_host == NULL )
-    {
-        return VLC_EGENERIC;
-    }
-
-    p_sys->psz_rtsp_path = strdup( url->psz_path ? url->psz_path : "/" );
-    p_sys->psz_rtsp_control = malloc (strlen( url->psz_host ) + 20 + strlen( p_sys->psz_rtsp_path ) + 1 );
-    sprintf( p_sys->psz_rtsp_control, "rtsp://%s:%d%s",
-             url->psz_host,  url->i_port > 0 ? url->i_port : 554, p_sys->psz_rtsp_path );
-
-    p_sys->p_rtsp_url = httpd_UrlNewUnique( p_sys->p_rtsp_host, p_sys->psz_rtsp_path, NULL, NULL, NULL );
-    if( p_sys->p_rtsp_url == 0 )
-    {
-        return VLC_EGENERIC;
-    }
-    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_DESCRIBE, RtspCallback, (void*)p_stream );
-    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_SETUP,    RtspCallback, (void*)p_stream );
-    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_PLAY,     RtspCallback, (void*)p_stream );
-    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_PAUSE,    RtspCallback, (void*)p_stream );
-    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_TEARDOWN, RtspCallback, (void*)p_stream );
-
-    return VLC_SUCCESS;
-}
-
-static int  RtspCallback( httpd_callback_sys_t *p_args,
-                          httpd_client_t *cl,
-                          httpd_message_t *answer, httpd_message_t *query )
-{
-    sout_stream_t *p_stream = (sout_stream_t*)p_args;
-    sout_stream_sys_t *p_sys = p_stream->p_sys;
-    char *psz_destination = p_sys->psz_destination;
-    const char *psz_session = NULL;
-    const char *psz_cseq = NULL;
-
-    if( answer == NULL || query == NULL )
-    {
-        return VLC_SUCCESS;
-    }
-    //fprintf( stderr, "RtspCallback query: type=%d\n", query->i_type );
-
-    answer->i_proto = HTTPD_PROTO_RTSP;
-    answer->i_version= query->i_version;
-    answer->i_type   = HTTPD_MSG_ANSWER;
-    answer->i_body = 0;
-    answer->p_body = NULL;
-
-    if( httpd_MsgGet( query, "Require" ) != NULL )
-    {
-        answer->i_status = 551;
-        httpd_MsgAdd( query, "Unsupported", "%s",
-                      httpd_MsgGet( query, "Require" ) );
-    }
-    else
-    switch( query->i_type )
-    {
-        case HTTPD_MSG_DESCRIBE:
-        {
-            char *psz_sdp = SDPGenerate( p_stream, psz_destination, VLC_TRUE );
-
-            answer->i_status = 200;
-            httpd_MsgAdd( answer, "Content-Type",  "%s", "application/sdp" );
-            httpd_MsgAdd( answer, "Content-Base",  "%s", p_sys->psz_rtsp_control );
-            answer->p_body = (uint8_t *)psz_sdp;
-            answer->i_body = strlen( psz_sdp );
-            break;
-        }
-
-        case HTTPD_MSG_SETUP:
-            answer->i_status = 459;
-            break;
-
-        case HTTPD_MSG_PLAY:
-        {
-            rtsp_client_t *rtsp;
-            /* for now only multicast so easy */
-            answer->i_status = 200;
-
-            psz_session = httpd_MsgGet( query, "Session" );
-            rtsp = RtspClientGet( p_stream, psz_session );
-            if( rtsp && !rtsp->b_playing )
-            {
-                int i_id;
-                /* FIXME */
-                rtsp->b_playing = VLC_TRUE;
-
-                vlc_mutex_lock( &p_sys->lock_es );
-                for( i_id = 0; i_id < rtsp->i_id; i_id++ )
-                {
-                    sout_stream_id_t *id = rtsp->id[i_id];
-                    int i;
-
-                    for( i = 0; i < p_sys->i_es; i++ )
-                    {
-                        if( id == p_sys->es[i] )
-                            break;
-                    }
-                    if( i >= p_sys->i_es ) continue;
-
-                    vlc_mutex_lock( &id->lock_rtsp );
-                    TAB_APPEND( id->i_rtsp_access, id->rtsp_access, rtsp->access[i_id] );
-                    vlc_mutex_unlock( &id->lock_rtsp );
-                }
-                vlc_mutex_unlock( &p_sys->lock_es );
-            }
-            break;
-        }
-
-        case HTTPD_MSG_PAUSE:
-            answer->i_status = 405;
-            httpd_MsgAdd( answer, "Allow", "DESCRIBE, PLAY, TEARDOWN" );
-            break;
-
-        case HTTPD_MSG_TEARDOWN:
-        {
-            rtsp_client_t *rtsp;
-
-            /* for now only multicast so easy again */
-            answer->i_status = 200;
-
-            psz_session = httpd_MsgGet( query, "Session" );
-            rtsp = RtspClientGet( p_stream, psz_session );
-            if( rtsp )
-            {
-                int i_id;
-
-                vlc_mutex_lock( &p_sys->lock_es );
-                for( i_id = 0; i_id < rtsp->i_id; i_id++ )
-                {
-                    sout_stream_id_t *id = rtsp->id[i_id];
-                    int i;
-
-                    for( i = 0; i < p_sys->i_es; i++ )
-                    {
-                        if( id == p_sys->es[i] )
-                            break;
-                    }
-                    if( i >= p_sys->i_es ) continue;
-
-                    vlc_mutex_lock( &id->lock_rtsp );
-                    TAB_REMOVE( id->i_rtsp_access, id->rtsp_access, rtsp->access[i_id] );
-                    vlc_mutex_unlock( &id->lock_rtsp );
-                }
-                vlc_mutex_unlock( &p_sys->lock_es );
-
-                RtspClientDel( p_stream, rtsp );
-            }
-            break;
-        }
-
-        default:
-            return VLC_EGENERIC;
-    }
-
-    httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
-    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
-    psz_cseq = httpd_MsgGet( query, "Cseq" );
-    if( psz_cseq )
-        httpd_MsgAdd( answer, "Cseq", "%s", psz_cseq );
-    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
-
-    if( psz_session )
-        httpd_MsgAdd( answer, "Session", "%s;timeout=5", psz_session );
-    return VLC_SUCCESS;
-}
-
-
-/** Finds the next transport choice */
-static inline const char *transport_next( const char *str )
-{
-    /* Looks for comma */
-    str = strchr( str, ',' );
-    if( str == NULL )
-        return NULL; /* No more transport options */
-
-    str++; /* skips comma */
-    while( strchr( "\r\n\t ", *str ) )
-        str++;
-
-    return (*str) ? str : NULL;
-}
-
-
-/** Finds the next transport parameter */
-static inline const char *parameter_next( const char *str )
-{
-    while( strchr( ",;", *str ) == NULL )
-        str++;
-
-    return (*str == ';') ? (str + 1) : NULL;
-}
-
-
-static int RtspCallbackId( httpd_callback_sys_t *p_args,
-                           httpd_client_t *cl,
-                           httpd_message_t *answer, httpd_message_t *query )
-{
-    sout_stream_id_t *id = (sout_stream_id_t*)p_args;
-    sout_stream_t    *p_stream = id->p_stream;
-    sout_stream_sys_t *p_sys = p_stream->p_sys;
-    char psz_session_init[21];
-    const char *psz_session;
-    const char *psz_cseq;
-
-    if( answer == NULL || query == NULL )
-        return VLC_SUCCESS;
-    //fprintf( stderr, "RtspCallback query: type=%d\n", query->i_type );
-
-    /* */
-    answer->i_proto = HTTPD_PROTO_RTSP;
-    answer->i_version= query->i_version;
-    answer->i_type   = HTTPD_MSG_ANSWER;
-    answer->i_body = 0;
-    answer->p_body = NULL;
-
-    /* Create new session ID if needed */
-    psz_session = httpd_MsgGet( query, "Session" );
-    if( psz_session == NULL )
-    {
-        /* FIXME: should be somewhat secure randomness */
-        snprintf( psz_session_init, sizeof(psz_session_init), I64Fd,
-                  NTPtime64() + rand() );
-    }
-
-    if( httpd_MsgGet( query, "Require" ) != NULL )
-    {
-        answer->i_status = 551;
-        httpd_MsgAdd( query, "Unsupported", "%s",
-                      httpd_MsgGet( query, "Require" ) );
-    }
-    else
-    switch( query->i_type )
-    {
-        case HTTPD_MSG_SETUP:
-        {
-            answer->i_status = 461;
-
-            for( const char *tpt = httpd_MsgGet( query, "Transport" );
-                 tpt != NULL;
-                 tpt = transport_next( tpt ) )
-            {
-                vlc_bool_t b_multicast = VLC_TRUE, b_unsupp = VLC_FALSE;
-                unsigned loport = 5004, hiport = 5005; /* from RFC3551 */
-
-                /* Check transport protocol. */
-                /* Currently, we only support RTP/AVP over UDP */
-                if( strncmp( tpt, "RTP/AVP", 7 ) )
-                    continue;
-                tpt += 7;
-                if( strncmp( tpt, "/UDP", 4 ) == 0 )
-                    tpt += 4;
-                if( strchr( ";,", *tpt ) == NULL )
-                    continue;
-
-                /* Parse transport options */
-                for( const char *opt = parameter_next( tpt );
-                     opt != NULL;
-                     opt = parameter_next( opt ) )
-                {
-                    if( strncmp( opt, "multicast", 9 ) == 0)
-                        b_multicast = VLC_TRUE;
-                    else
-                    if( strncmp( opt, "unicast", 7 ) == 0 )
-                        b_multicast = VLC_FALSE;
-                    else
-                    if( sscanf( opt, "client_port=%u-%u", &loport, &hiport ) == 2 )
-                        ;
-                    else
-                    if( strncmp( opt, "mode=", 5 ) == 0 )
-                    {
-                        if( strncasecmp( opt + 5, "play", 4 )
-                         && strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
-                        {
-                            /* Not playing?! */
-                            b_unsupp = VLC_TRUE;
-                            break;
-                        }
-                    }
-                    else
-                    {
-                    /*
-                     * Every other option is unsupported:
-                     *
-                     * "source" and "append" are invalid.
-                     *
-                     * For multicast, "port", "layers", "ttl" are set by the
-                     * stream output configuration.
-                     *
-                     * For unicast, we do not allow "destination" as it
-                     * carries a DoS risk, and we decide on "server_port".
-                     *
-                     * "interleaved" and "ssrc" are not implemented.
-                     */
-                        b_unsupp = VLC_TRUE;
-                        break;
-                    }
-                }
-
-                if( b_unsupp )
-                    continue;
-
-                if( b_multicast )
-                {
-                    if( id->psz_destination == NULL )
-                        continue;
-
-                    answer->i_status = 200;
-
-                    httpd_MsgAdd( answer, "Transport",
-                                  "RTP/AVP/UDP;destination=%s;port=%d-%d;"
-                                  "ttl=%d;mode=play",
-                                  id->psz_destination, id->i_port, id->i_port+1,
-                                  ( p_sys->i_ttl > 0 ) ? p_sys->i_ttl : 1 );
-                }
-                else
-                {
-                    char ip[NI_MAXNUMERICHOST], psz_access[22],
-                         url[NI_MAXNUMERICHOST + 8];
-                    sout_access_out_t *p_access;
-                    rtsp_client_t *rtsp = NULL;
-
-                    if( ( hiport - loport ) > 1 )
-                        continue;
-
-                    if( psz_session == NULL )
-                    {
-                        psz_session = psz_session_init;
-                        rtsp = RtspClientNew( p_stream, psz_session );
-                    }
-                    else
-                    {
-                        /* FIXME: we probably need to remove an access out,
-                         * if there is already one for the same ID */
-                        rtsp = RtspClientGet( p_stream, psz_session );
-                        if( rtsp == NULL )
-                        {
-                            answer->i_status = 454;
-                            continue;
-                        }
-                    }
-
-                    if( httpd_ClientIP( cl, ip ) == NULL )
-                    {
-                        answer->i_status = 500;
-                        continue;
-                    }
-
-                    if( p_sys->i_ttl )
-                        snprintf( psz_access, sizeof( psz_access ),
-                                  "udp{raw,rtcp,ttl=%d}", p_sys->i_ttl );
-                    else
-                        strcpy( psz_access, "udp{raw,rtcp}" );
-
-                    snprintf( url, sizeof( url ),
-                              ( strchr( ip, ':' ) != NULL ) ? "[%s]:%d" : "%s:%d",
-                              ip, loport );
-
-                    p_access = sout_AccessOutNew( p_stream->p_sout,
-                                                  psz_access, url );
-                    if( p_access == NULL )
-                    {
-                        msg_Err( p_stream,
-                                 "cannot create access output for %s://%s",
-                                 psz_access, url );
-                        answer->i_status = 500;
-                        break;
-                    }
-
-                    TAB_APPEND( rtsp->i_id, rtsp->id, id );
-                    TAB_APPEND( rtsp->i_access, rtsp->access, p_access );
-
-                    char *src = var_GetNonEmptyString (p_access, "src-addr");
-                    int sport = var_GetInteger (p_access, "src-port");
-
-                    httpd_ServerIP( cl, ip );
-
-                    if( ( src != NULL ) && strcmp( src, ip ) )
-                    {
-                        /* Specify source IP if it is different from the RTSP
-                         * control connection server address */
-                        char *ptr = strchr( src, '%' );
-                        if( ptr != NULL ) *ptr = '\0'; /* remove scope ID */
-
-                        httpd_MsgAdd( answer, "Transport",
-                                      "RTP/AVP/UDP;unicast;source=%s;"
-                                      "client_port=%u-%u;server_port=%u-%u;"
-                                      "mode=play",
-                                      src, loport, hiport, sport, sport + 1 );
-                    }
-                    else
-                    {
-                        httpd_MsgAdd( answer, "Transport",
-                                      "RTP/AVP/UDP;unicast;"
-                                      "client_port=%u-%u;server_port=%u-%u;"
-                                      "mode=play",
-                                      loport, hiport, sport, sport + 1 );
-                    }
-
-                    answer->i_status = 200;
-                    free( src );
-                }
-                break;
-            }
-            break;
-        }
-
-        default:
-            answer->i_status = 460;
-            break;
-    }
-
-    psz_cseq = httpd_MsgGet( query, "Cseq" );
-    if( psz_cseq )
-        httpd_MsgAdd( answer, "Cseq", "%s", psz_cseq );
-    httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
-    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
-    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
-
-    if( psz_session )
-        httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );
-    return VLC_SUCCESS;
-}
-
 /****************************************************************************
  * rtp_packetize_*:
  ****************************************************************************/
diff --git a/modules/stream_out/rtp.h b/modules/stream_out/rtp.h
new file mode 100644 (file)
index 0000000..a91e14c
--- /dev/null
@@ -0,0 +1,74 @@
+/*****************************************************************************
+ * rtp.h: rtp stream output module header
+ *****************************************************************************
+ * Copyright (C) 2003-2007 the VideoLAN team
+ * $Id: rtp.c 21407 2007-08-22 20:10:41Z courmisch $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *          Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+typedef struct rtsp_client_t rtsp_client_t;
+
+int RtspSetup( sout_stream_t *p_stream, vlc_url_t * );
+
+int RtspCallbackId( httpd_callback_sys_t *, httpd_client_t *,
+                    httpd_message_t *, httpd_message_t * );
+
+void RtspClientDel( sout_stream_t *, rtsp_client_t * );
+
+char *SDPGenerate( const sout_stream_t *p_stream,
+                   const char *psz_destination, vlc_bool_t b_rtsp );
+
+typedef int (*pf_rtp_packetizer_t)( sout_stream_t *, sout_stream_id_t *,
+                                    block_t * );
+
+struct sout_stream_id_t
+{
+    sout_stream_t *p_stream;
+    /* rtp field */
+    uint8_t     i_payload_type;
+    uint16_t    i_sequence;
+    uint32_t    i_timestamp_start;
+    uint8_t     ssrc[4];
+
+    /* for sdp */
+    int         i_clock_rate;
+    char        *psz_rtpmap;
+    char        *psz_fmtp;
+    char        *psz_destination;
+    int         i_port;
+    int         i_cat;
+    int         i_bitrate;
+
+    /* Packetizer specific fields */
+    pf_rtp_packetizer_t pf_packetize;
+    int           i_mtu;
+
+    /* for sending the packets */
+    sout_access_out_t *p_access;
+
+    vlc_mutex_t       lock_rtsp;
+    int               i_rtsp_access;
+    sout_access_out_t **rtsp_access;
+
+    /* */
+    sout_input_t      *p_input;
+
+    /* RTSP url control */
+    httpd_url_t  *p_rtsp_url;
+};
diff --git a/modules/stream_out/rtsp.c b/modules/stream_out/rtsp.c
new file mode 100644 (file)
index 0000000..03a49d2
--- /dev/null
@@ -0,0 +1,603 @@
+/*****************************************************************************
+ * rtsp.c: RTSP support for RTP stream output module
+ *****************************************************************************
+ * Copyright (C) 2003-2007 the VideoLAN team
+ * $Id: rtp.c 21407 2007-08-22 20:10:41Z courmisch $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <vlc/vlc.h>
+#include <vlc_sout.h>
+#include <vlc_block.h>
+
+#include <vlc_httpd.h>
+#include <vlc_url.h>
+#include <vlc_network.h>
+#include <vlc_charset.h>
+#include <vlc_strings.h>
+
+#include "rtp.h"
+
+/* For unicast/interleaved streaming */
+struct rtsp_client_t
+{
+    char    *psz_session;
+    int64_t i_last; /* for timeout */
+
+    /* is it in "play" state */
+    vlc_bool_t b_playing;
+
+    /* output (id-access) */
+    int               i_id;
+    sout_stream_id_t  **id;
+    int               i_access;
+    sout_access_out_t **access;
+};
+
+struct sout_stream_sys_t
+{
+    /* sdp */
+    int64_t i_sdp_id;
+    int     i_sdp_version;
+    char    *psz_sdp;
+    vlc_mutex_t  lock_sdp;
+
+    char        *psz_session_name;
+    char        *psz_session_description;
+    char        *psz_session_url;
+    char        *psz_session_email;
+
+    /* */
+    vlc_bool_t b_export_sdp_file;
+    char *psz_sdp_file;
+    /* sap */
+    vlc_bool_t b_export_sap;
+    session_descriptor_t *p_session;
+
+    httpd_host_t *p_httpd_host;
+    httpd_file_t *p_httpd_file;
+
+    httpd_host_t *p_rtsp_host;
+    httpd_url_t  *p_rtsp_url;
+    char         *psz_rtsp_control;
+    char         *psz_rtsp_path;
+
+    /* */
+    char *psz_destination;
+    int  i_port;
+    int  i_port_audio;
+    int  i_port_video;
+    int  i_ttl;
+    vlc_bool_t b_latm;
+
+    /* when need to use a private one or when using muxer */
+    int i_payload_type;
+
+    /* in case we do TS/PS over rtp */
+    sout_mux_t        *p_mux;
+    sout_access_out_t *p_access;
+    int               i_mtu;
+    sout_access_out_t *p_grab;
+    uint16_t          i_sequence;
+    uint32_t          i_timestamp_start;
+    uint8_t           ssrc[4];
+    block_t           *packet;
+
+    /* */
+    vlc_mutex_t      lock_es;
+    int              i_es;
+    sout_stream_id_t **es;
+
+    /* */
+    int              i_rtsp;
+    rtsp_client_t    **rtsp;
+};
+
+
+static int  RtspCallback( httpd_callback_sys_t *p_args,
+                          httpd_client_t *cl,
+                          httpd_message_t *answer, httpd_message_t *query );
+
+
+
+int RtspSetup( sout_stream_t *p_stream, vlc_url_t *url )
+{
+    sout_stream_sys_t *p_sys = p_stream->p_sys;
+
+    msg_Dbg( p_stream, "rtsp setup: %s : %d / %s\n", url->psz_host, url->i_port, url->psz_path );
+
+    p_sys->p_rtsp_host = httpd_HostNew( VLC_OBJECT(p_stream), url->psz_host, url->i_port > 0 ? url->i_port : 554 );
+    if( p_sys->p_rtsp_host == NULL )
+    {
+        return VLC_EGENERIC;
+    }
+
+    p_sys->psz_rtsp_path = strdup( url->psz_path ? url->psz_path : "/" );
+    p_sys->psz_rtsp_control = malloc (strlen( url->psz_host ) + 20 + strlen( p_sys->psz_rtsp_path ) + 1 );
+    sprintf( p_sys->psz_rtsp_control, "rtsp://%s:%d%s",
+             url->psz_host,  url->i_port > 0 ? url->i_port : 554, p_sys->psz_rtsp_path );
+
+    p_sys->p_rtsp_url = httpd_UrlNewUnique( p_sys->p_rtsp_host, p_sys->psz_rtsp_path, NULL, NULL, NULL );
+    if( p_sys->p_rtsp_url == 0 )
+    {
+        return VLC_EGENERIC;
+    }
+    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_DESCRIBE, RtspCallback, (void*)p_stream );
+    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_SETUP,    RtspCallback, (void*)p_stream );
+    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_PLAY,     RtspCallback, (void*)p_stream );
+    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_PAUSE,    RtspCallback, (void*)p_stream );
+    httpd_UrlCatch( p_sys->p_rtsp_url, HTTPD_MSG_TEARDOWN, RtspCallback, (void*)p_stream );
+
+    return VLC_SUCCESS;
+}
+
+
+static rtsp_client_t *RtspClientNew( sout_stream_t *p_stream, const char *psz_session )
+{
+    rtsp_client_t *rtsp = malloc( sizeof( rtsp_client_t ));
+
+    rtsp->psz_session = strdup( psz_session );
+    rtsp->i_last = 0;
+    rtsp->b_playing = VLC_FALSE;
+    rtsp->i_id = 0;
+    rtsp->id = NULL;
+    rtsp->i_access = 0;
+    rtsp->access = NULL;
+
+    TAB_APPEND( p_stream->p_sys->i_rtsp, p_stream->p_sys->rtsp, rtsp );
+
+    return rtsp;
+}
+
+
+static rtsp_client_t *RtspClientGet( sout_stream_t *p_stream, const char *psz_session )
+{
+    int i;
+
+    if( !psz_session ) return NULL;
+
+    for( i = 0; i < p_stream->p_sys->i_rtsp; i++ )
+    {
+        if( !strcmp( p_stream->p_sys->rtsp[i]->psz_session, psz_session ) )
+        {
+            return p_stream->p_sys->rtsp[i];
+        }
+    }
+    return NULL;
+}
+
+
+/*static*/ void RtspClientDel( sout_stream_t *p_stream, rtsp_client_t *rtsp )
+{
+    int i;
+    TAB_REMOVE( p_stream->p_sys->i_rtsp, p_stream->p_sys->rtsp, rtsp );
+
+    for( i = 0; i < rtsp->i_access; i++ )
+    {
+        sout_AccessOutDelete( rtsp->access[i] );
+    }
+    if( rtsp->id )     free( rtsp->id );
+    if( rtsp->access ) free( rtsp->access );
+
+    free( rtsp->psz_session );
+    free( rtsp );
+}
+
+
+/** Aggregate RTSP callback */
+static int  RtspCallback( httpd_callback_sys_t *p_args,
+                          httpd_client_t *cl,
+                          httpd_message_t *answer, httpd_message_t *query )
+{
+    sout_stream_t *p_stream = (sout_stream_t*)p_args;
+    sout_stream_sys_t *p_sys = p_stream->p_sys;
+    char *psz_destination = p_sys->psz_destination;
+    const char *psz_session = NULL;
+    const char *psz_cseq = NULL;
+
+    if( answer == NULL || query == NULL )
+    {
+        return VLC_SUCCESS;
+    }
+    //fprintf( stderr, "RtspCallback query: type=%d\n", query->i_type );
+
+    answer->i_proto = HTTPD_PROTO_RTSP;
+    answer->i_version= query->i_version;
+    answer->i_type   = HTTPD_MSG_ANSWER;
+    answer->i_body = 0;
+    answer->p_body = NULL;
+
+    if( httpd_MsgGet( query, "Require" ) != NULL )
+    {
+        answer->i_status = 551;
+        httpd_MsgAdd( query, "Unsupported", "%s",
+                      httpd_MsgGet( query, "Require" ) );
+    }
+    else
+    switch( query->i_type )
+    {
+        case HTTPD_MSG_DESCRIBE:
+        {
+            char *psz_sdp = SDPGenerate( p_stream, psz_destination, VLC_TRUE );
+
+            answer->i_status = 200;
+            httpd_MsgAdd( answer, "Content-Type",  "%s", "application/sdp" );
+            httpd_MsgAdd( answer, "Content-Base",  "%s", p_sys->psz_rtsp_control );
+            answer->p_body = (uint8_t *)psz_sdp;
+            answer->i_body = strlen( psz_sdp );
+            break;
+        }
+
+        case HTTPD_MSG_SETUP:
+            answer->i_status = 459;
+            break;
+
+        case HTTPD_MSG_PLAY:
+        {
+            rtsp_client_t *rtsp;
+            /* for now only multicast so easy */
+            answer->i_status = 200;
+
+            psz_session = httpd_MsgGet( query, "Session" );
+            rtsp = RtspClientGet( p_stream, psz_session );
+            if( rtsp && !rtsp->b_playing )
+            {
+                int i_id;
+                /* FIXME */
+                rtsp->b_playing = VLC_TRUE;
+
+                vlc_mutex_lock( &p_sys->lock_es );
+                for( i_id = 0; i_id < rtsp->i_id; i_id++ )
+                {
+                    sout_stream_id_t *id = rtsp->id[i_id];
+                    int i;
+
+                    for( i = 0; i < p_sys->i_es; i++ )
+                    {
+                        if( id == p_sys->es[i] )
+                            break;
+                    }
+                    if( i >= p_sys->i_es ) continue;
+
+                    vlc_mutex_lock( &id->lock_rtsp );
+                    TAB_APPEND( id->i_rtsp_access, id->rtsp_access, rtsp->access[i_id] );
+                    vlc_mutex_unlock( &id->lock_rtsp );
+                }
+                vlc_mutex_unlock( &p_sys->lock_es );
+            }
+            break;
+        }
+
+        case HTTPD_MSG_PAUSE:
+            answer->i_status = 405;
+            httpd_MsgAdd( answer, "Allow", "DESCRIBE, PLAY, TEARDOWN" );
+            break;
+
+        case HTTPD_MSG_TEARDOWN:
+        {
+            rtsp_client_t *rtsp;
+
+            /* for now only multicast so easy again */
+            answer->i_status = 200;
+
+            psz_session = httpd_MsgGet( query, "Session" );
+            rtsp = RtspClientGet( p_stream, psz_session );
+            if( rtsp )
+            {
+                int i_id;
+
+                vlc_mutex_lock( &p_sys->lock_es );
+                for( i_id = 0; i_id < rtsp->i_id; i_id++ )
+                {
+                    sout_stream_id_t *id = rtsp->id[i_id];
+                    int i;
+
+                    for( i = 0; i < p_sys->i_es; i++ )
+                    {
+                        if( id == p_sys->es[i] )
+                            break;
+                    }
+                    if( i >= p_sys->i_es ) continue;
+
+                    vlc_mutex_lock( &id->lock_rtsp );
+                    TAB_REMOVE( id->i_rtsp_access, id->rtsp_access, rtsp->access[i_id] );
+                    vlc_mutex_unlock( &id->lock_rtsp );
+                }
+                vlc_mutex_unlock( &p_sys->lock_es );
+
+                RtspClientDel( p_stream, rtsp );
+            }
+            break;
+        }
+
+        default:
+            return VLC_EGENERIC;
+    }
+
+    httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
+    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
+    psz_cseq = httpd_MsgGet( query, "Cseq" );
+    if( psz_cseq )
+        httpd_MsgAdd( answer, "Cseq", "%s", psz_cseq );
+    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
+
+    if( psz_session )
+        httpd_MsgAdd( answer, "Session", "%s;timeout=5", psz_session );
+    return VLC_SUCCESS;
+}
+
+
+/** Finds the next transport choice */
+static inline const char *transport_next( const char *str )
+{
+    /* Looks for comma */
+    str = strchr( str, ',' );
+    if( str == NULL )
+        return NULL; /* No more transport options */
+
+    str++; /* skips comma */
+    while( strchr( "\r\n\t ", *str ) )
+        str++;
+
+    return (*str) ? str : NULL;
+}
+
+
+/** Finds the next transport parameter */
+static inline const char *parameter_next( const char *str )
+{
+    while( strchr( ",;", *str ) == NULL )
+        str++;
+
+    return (*str == ';') ? (str + 1) : NULL;
+}
+
+
+/** Non-aggregate RTSP callback */
+/*static*/ int RtspCallbackId( httpd_callback_sys_t *p_args,
+                           httpd_client_t *cl,
+                           httpd_message_t *answer, httpd_message_t *query )
+{
+    sout_stream_id_t *id = (sout_stream_id_t*)p_args;
+    sout_stream_t    *p_stream = id->p_stream;
+    sout_stream_sys_t *p_sys = p_stream->p_sys;
+    char psz_session_init[21];
+    const char *psz_session;
+    const char *psz_cseq;
+
+    if( answer == NULL || query == NULL )
+        return VLC_SUCCESS;
+    //fprintf( stderr, "RtspCallback query: type=%d\n", query->i_type );
+
+    /* */
+    answer->i_proto = HTTPD_PROTO_RTSP;
+    answer->i_version= query->i_version;
+    answer->i_type   = HTTPD_MSG_ANSWER;
+    answer->i_body = 0;
+    answer->p_body = NULL;
+
+    /* Create new session ID if needed */
+    psz_session = httpd_MsgGet( query, "Session" );
+    if( psz_session == NULL )
+    {
+        /* FIXME: should be somewhat secure randomness */
+        snprintf( psz_session_init, sizeof(psz_session_init), I64Fd,
+                  NTPtime64() + rand() );
+    }
+
+    if( httpd_MsgGet( query, "Require" ) != NULL )
+    {
+        answer->i_status = 551;
+        httpd_MsgAdd( query, "Unsupported", "%s",
+                      httpd_MsgGet( query, "Require" ) );
+    }
+    else
+    switch( query->i_type )
+    {
+        case HTTPD_MSG_SETUP:
+        {
+            answer->i_status = 461;
+
+            for( const char *tpt = httpd_MsgGet( query, "Transport" );
+                 tpt != NULL;
+                 tpt = transport_next( tpt ) )
+            {
+                vlc_bool_t b_multicast = VLC_TRUE, b_unsupp = VLC_FALSE;
+                unsigned loport = 5004, hiport = 5005; /* from RFC3551 */
+
+                /* Check transport protocol. */
+                /* Currently, we only support RTP/AVP over UDP */
+                if( strncmp( tpt, "RTP/AVP", 7 ) )
+                    continue;
+                tpt += 7;
+                if( strncmp( tpt, "/UDP", 4 ) == 0 )
+                    tpt += 4;
+                if( strchr( ";,", *tpt ) == NULL )
+                    continue;
+
+                /* Parse transport options */
+                for( const char *opt = parameter_next( tpt );
+                     opt != NULL;
+                     opt = parameter_next( opt ) )
+                {
+                    if( strncmp( opt, "multicast", 9 ) == 0)
+                        b_multicast = VLC_TRUE;
+                    else
+                    if( strncmp( opt, "unicast", 7 ) == 0 )
+                        b_multicast = VLC_FALSE;
+                    else
+                    if( sscanf( opt, "client_port=%u-%u", &loport, &hiport ) == 2 )
+                        ;
+                    else
+                    if( strncmp( opt, "mode=", 5 ) == 0 )
+                    {
+                        if( strncasecmp( opt + 5, "play", 4 )
+                         && strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
+                        {
+                            /* Not playing?! */
+                            b_unsupp = VLC_TRUE;
+                            break;
+                        }
+                    }
+                    else
+                    {
+                    /*
+                     * Every other option is unsupported:
+                     *
+                     * "source" and "append" are invalid.
+                     *
+                     * For multicast, "port", "layers", "ttl" are set by the
+                     * stream output configuration.
+                     *
+                     * For unicast, we do not allow "destination" as it
+                     * carries a DoS risk, and we decide on "server_port".
+                     *
+                     * "interleaved" and "ssrc" are not implemented.
+                     */
+                        b_unsupp = VLC_TRUE;
+                        break;
+                    }
+                }
+
+                if( b_unsupp )
+                    continue;
+
+                if( b_multicast )
+                {
+                    if( id->psz_destination == NULL )
+                        continue;
+
+                    answer->i_status = 200;
+
+                    httpd_MsgAdd( answer, "Transport",
+                                  "RTP/AVP/UDP;destination=%s;port=%d-%d;"
+                                  "ttl=%d;mode=play",
+                                  id->psz_destination, id->i_port, id->i_port+1,
+                                  ( p_sys->i_ttl > 0 ) ? p_sys->i_ttl : 1 );
+                }
+                else
+                {
+                    char ip[NI_MAXNUMERICHOST], psz_access[22],
+                         url[NI_MAXNUMERICHOST + 8];
+                    sout_access_out_t *p_access;
+                    rtsp_client_t *rtsp = NULL;
+
+                    if( ( hiport - loport ) > 1 )
+                        continue;
+
+                    if( psz_session == NULL )
+                    {
+                        psz_session = psz_session_init;
+                        rtsp = RtspClientNew( p_stream, psz_session );
+                    }
+                    else
+                    {
+                        /* FIXME: we probably need to remove an access out,
+                         * if there is already one for the same ID */
+                        rtsp = RtspClientGet( p_stream, psz_session );
+                        if( rtsp == NULL )
+                        {
+                            answer->i_status = 454;
+                            continue;
+                        }
+                    }
+
+                    if( httpd_ClientIP( cl, ip ) == NULL )
+                    {
+                        answer->i_status = 500;
+                        continue;
+                    }
+
+                    if( p_sys->i_ttl )
+                        snprintf( psz_access, sizeof( psz_access ),
+                                  "udp{raw,rtcp,ttl=%d}", p_sys->i_ttl );
+                    else
+                        strcpy( psz_access, "udp{raw,rtcp}" );
+
+                    snprintf( url, sizeof( url ),
+                              ( strchr( ip, ':' ) != NULL ) ? "[%s]:%d" : "%s:%d",
+                              ip, loport );
+
+                    p_access = sout_AccessOutNew( p_stream->p_sout,
+                                                  psz_access, url );
+                    if( p_access == NULL )
+                    {
+                        msg_Err( p_stream,
+                                 "cannot create access output for %s://%s",
+                                 psz_access, url );
+                        answer->i_status = 500;
+                        break;
+                    }
+
+                    TAB_APPEND( rtsp->i_id, rtsp->id, id );
+                    TAB_APPEND( rtsp->i_access, rtsp->access, p_access );
+
+                    char *src = var_GetNonEmptyString (p_access, "src-addr");
+                    int sport = var_GetInteger (p_access, "src-port");
+
+                    httpd_ServerIP( cl, ip );
+
+                    if( ( src != NULL ) && strcmp( src, ip ) )
+                    {
+                        /* Specify source IP if it is different from the RTSP
+                         * control connection server address */
+                        char *ptr = strchr( src, '%' );
+                        if( ptr != NULL ) *ptr = '\0'; /* remove scope ID */
+
+                        httpd_MsgAdd( answer, "Transport",
+                                      "RTP/AVP/UDP;unicast;source=%s;"
+                                      "client_port=%u-%u;server_port=%u-%u;"
+                                      "mode=play",
+                                      src, loport, hiport, sport, sport + 1 );
+                    }
+                    else
+                    {
+                        httpd_MsgAdd( answer, "Transport",
+                                      "RTP/AVP/UDP;unicast;"
+                                      "client_port=%u-%u;server_port=%u-%u;"
+                                      "mode=play",
+                                      loport, hiport, sport, sport + 1 );
+                    }
+
+                    answer->i_status = 200;
+                    free( src );
+                }
+                break;
+            }
+            break;
+        }
+
+        default:
+            answer->i_status = 460;
+            break;
+    }
+
+    psz_cseq = httpd_MsgGet( query, "Cseq" );
+    if( psz_cseq )
+        httpd_MsgAdd( answer, "Cseq", "%s", psz_cseq );
+    httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
+    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
+    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
+
+    if( psz_session )
+        httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );
+    return VLC_SUCCESS;
+}