rtsp.c 44.9 KB
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/*****************************************************************************
 * rtsp.c: rtsp VoD server module
 *****************************************************************************
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 * Copyright (C) 2003-2006 the VideoLAN team
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 * $Id$
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *          Gildas Bazin <gbazin@videolan.org>
 *
 * 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
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
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#define _GNU_SOURCE
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#include <stdlib.h>

#include <errno.h>

#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/sout.h>

#include "vlc_httpd.h"
#include "vlc_vod.h"
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#include "vlc_url.h"
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#include "network.h"
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#include "charset.h"
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/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );

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#define HOST_TEXT N_( "RTSP host address" )
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/// \bug [String] extra space
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#define HOST_LONGTEXT N_( \
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    "This defines the address, port and path the RTSP VOD server will listen " \
    "on.\nSyntax is address:port/path. The default is to listen on all "\
    "interfaces (address 0.0.0.0), on port 554, with no path.\n To listen " \
    "only on the local interface, use \"localhost\" as address." )
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#define THROTLE_TEXT N_( "Maximum number of connections" )
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#define THROTLE_LONGTEXT N_( "This limits the maximum number of clients " \
    "that can connect to the RTSP VOD. 0 means no limit."  )
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#define RAWMUX_TEXT N_( "MUX for RAW RTSP transport" )

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vlc_module_begin();
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    set_shortname( _("RTSP VoD" ) );
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    set_description( _("RTSP VoD server") );
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    set_category( CAT_SOUT );
    set_subcategory( SUBCAT_SOUT_VOD );
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    set_capability( "vod server", 1 );
    set_callbacks( Open, Close );
    add_shortcut( "rtsp" );
    add_string ( "rtsp-host", NULL, NULL, HOST_TEXT, HOST_LONGTEXT, VLC_TRUE );
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    add_string( "rtsp-raw-mux", "ts", NULL, RAWMUX_TEXT, RAWMUX_TEXT, VLC_TRUE );
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    add_integer( "rtsp-throttle-users", 0, NULL, THROTLE_TEXT,
                                           THROTLE_LONGTEXT, VLC_TRUE );
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vlc_module_end();

/*****************************************************************************
 * Exported prototypes
 *****************************************************************************/

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typedef struct media_es_t media_es_t;

typedef struct
{
    media_es_t *p_media_es;
    char *psz_ip;
    int i_port;

} rtsp_client_es_t;

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typedef struct
{
    char *psz_session;
    int64_t i_last; /* for timeout */

    vlc_bool_t b_playing; /* is it in "play" state */
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    vlc_bool_t b_paused; /* is it in "pause" state */

    int i_es;
    rtsp_client_es_t **es;
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} rtsp_client_t;

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struct media_es_t
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{
    /* VoD server */
    vod_t *p_vod;

    /* RTSP server */
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    httpd_url_t *p_rtsp_url;
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    vod_media_t *p_media;

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    es_format_t fmt;
    int         i_port;
    uint8_t     i_payload_type;
    char        *psz_rtpmap;
    char        *psz_fmtp;

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};
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struct vod_media_t
{
    /* VoD server */
    vod_t *p_vod;

    /* RTSP server */
    httpd_url_t  *p_rtsp_url;
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    char         *psz_rtsp_control_v4;
    char         *psz_rtsp_control_v6;
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    char         *psz_rtsp_path;

    int  i_port;
    int  i_port_audio;
    int  i_port_video;
    int  i_ttl;
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    int  i_payload_type;

    int64_t i_sdp_id;
    int     i_sdp_version;

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    vlc_bool_t b_multicast;

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    vlc_mutex_t lock;
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    /* ES list */
    int        i_es;
    media_es_t **es;
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    char       *psz_mux;
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    vlc_bool_t  b_raw;
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    /* RTSP client */
    int           i_rtsp;
    rtsp_client_t **rtsp;
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    /* Infos */
    char *psz_session_name;
    char *psz_session_description;
    char *psz_session_url;
    char *psz_session_email;
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    mtime_t i_length;
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};

struct vod_sys_t
{
    /* RTSP server */
    httpd_host_t *p_rtsp_host;
    char *psz_path;
    int i_port;
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    int i_throttle_users;
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    int i_connections;
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    char *psz_raw_mux;

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    /* List of media */
    int i_media;
    vod_media_t **media;
};

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static vod_media_t *MediaNew( vod_t *, const char *, input_item_t * );
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static void         MediaDel( vod_t *, vod_media_t * );
static int          MediaAddES( vod_t *, vod_media_t *, es_format_t * );
static void         MediaDelES( vod_t *, vod_media_t *, es_format_t * );

static rtsp_client_t *RtspClientNew( vod_media_t *, char * );
static rtsp_client_t *RtspClientGet( vod_media_t *, char * );
static void           RtspClientDel( vod_media_t *, rtsp_client_t * );

static int RtspCallback( httpd_callback_sys_t *, httpd_client_t *,
                         httpd_message_t *, httpd_message_t * );
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static int RtspCallbackES( httpd_callback_sys_t *, httpd_client_t *,
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                           httpd_message_t *, httpd_message_t * );

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static char *SDPGenerate( const vod_media_t *, httpd_client_t *cl );
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static void sprintf_hexa( char *s, uint8_t *p_data, int i_data )
{
    static const char hex[16] = "0123456789abcdef";
    int i;

    for( i = 0; i < i_data; i++ )
    {
        s[2*i+0] = hex[(p_data[i]>>4)&0xf];
        s[2*i+1] = hex[(p_data[i]   )&0xf];
    }
    s[2*i_data] = '\0';
}

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/*****************************************************************************
 * Open: Starts the RTSP server module
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    vod_t *p_vod = (vod_t *)p_this;
    vod_sys_t *p_sys = 0;
    char *psz_url = 0;
    vlc_url_t url;

    psz_url = config_GetPsz( p_vod, "rtsp-host" );
    vlc_UrlParse( &url, psz_url, 0 );
    if( psz_url ) free( psz_url );

    if( url.i_port <= 0 ) url.i_port = 554;

    p_vod->p_sys = p_sys = malloc( sizeof( vod_sys_t ) );
    if( !p_sys ) goto error;
    p_sys->p_rtsp_host = 0;

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    var_Create( p_this, "rtsp-throttle-users", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    p_sys->i_throttle_users = var_GetInteger( p_this, "rtsp-throtle-users" );
    msg_Dbg( p_this, "allowing up to %d connections", p_sys->i_throttle_users );
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    p_sys->i_connections = 0;

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    var_Create( p_this, "rtsp-raw-mux", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
    p_sys->psz_raw_mux = var_GetString( p_this, "rtsp-raw-mux" );
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    p_sys->p_rtsp_host =
        httpd_HostNew( VLC_OBJECT(p_vod), url.psz_host, url.i_port );
    if( !p_sys->p_rtsp_host )
    {
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        msg_Err( p_vod, "cannot create RTSP server (%s:%i)",
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                 url.psz_host, url.i_port );
        goto error;
    }

    p_sys->psz_path = strdup( url.psz_path ? url.psz_path : "/" );
    p_sys->i_port = url.i_port;

    vlc_UrlClean( &url );
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    p_sys->media = NULL;
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    p_sys->i_media = 0;

    p_vod->pf_media_new = MediaNew;
    p_vod->pf_media_del = MediaDel;
    p_vod->pf_media_add_es = MediaAddES;
    p_vod->pf_media_del_es = MediaDelES;

    return VLC_SUCCESS;

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error:
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    if( p_sys && p_sys->p_rtsp_host ) httpd_HostDelete( p_sys->p_rtsp_host );
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    if( p_sys && p_sys->psz_raw_mux ) free( p_sys->psz_raw_mux );
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    if( p_sys ) free( p_sys );
    vlc_UrlClean( &url );
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    return VLC_EGENERIC;
}

/*****************************************************************************
 * Close:
 *****************************************************************************/
static void Close( vlc_object_t * p_this )
{
    vod_t *p_vod = (vod_t *)p_this;
    vod_sys_t *p_sys = p_vod->p_sys;

    httpd_HostDelete( p_sys->p_rtsp_host );
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    var_Destroy( p_this, "rtsp-throttle-users" );
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    var_Destroy( p_this, "rtsp-raw-mux" );
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    /* TODO delete medias */
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    free( p_sys->psz_path );
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    free( p_sys->psz_raw_mux );
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    free( p_sys );
}

/*****************************************************************************
 * Media handling
 *****************************************************************************/
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static vod_media_t *MediaNew( vod_t *p_vod, const char *psz_name,
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                              input_item_t *p_item )
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{
    vod_sys_t *p_sys = p_vod->p_sys;
    vod_media_t *p_media = malloc( sizeof(vod_media_t) );
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    int i;
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    if( !p_media )
    {
        msg_Err( p_vod, "not enough memory" );
        return NULL;
    }

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    memset( p_media, 0, sizeof(vod_media_t) );
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    p_media->es = 0;
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    p_media->psz_mux = 0;
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    p_media->rtsp = 0;
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    p_media->b_raw = VLC_FALSE;
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    asprintf( &p_media->psz_rtsp_path, "%s%s", p_sys->psz_path, psz_name );
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    p_media->p_rtsp_url =
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        httpd_UrlNewUnique( p_sys->p_rtsp_host, p_media->psz_rtsp_path, NULL,
                            NULL, NULL );
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    if( !p_media->p_rtsp_url )
    {
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        msg_Err( p_vod, "cannot create RTSP url (%s)", p_media->psz_rtsp_path);
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        free( p_media->psz_rtsp_path );
        free( p_media );
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        return NULL;
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    }

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    msg_Dbg( p_vod, "created RTSP url: %s", p_media->psz_rtsp_path );
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    asprintf( &p_media->psz_rtsp_control_v4,
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               "a=control:rtsp://%%s:%d%s/trackID=%%d\r\n",
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               p_sys->i_port, p_media->psz_rtsp_path );
    asprintf( &p_media->psz_rtsp_control_v6,
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               "a=control:rtsp://[%%s]:%d%s/trackID=%%d\r\n",
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              p_sys->i_port, p_media->psz_rtsp_path );
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    httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_SETUP,
                    RtspCallback, (void*)p_media );
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    httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_DESCRIBE,
                    RtspCallback, (void*)p_media );
    httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_PLAY,
                    RtspCallback, (void*)p_media );
    httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_PAUSE,
                    RtspCallback, (void*)p_media );
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    httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_GETPARAMETER,
                    RtspCallback, (void*)p_media );
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    httpd_UrlCatch( p_media->p_rtsp_url, HTTPD_MSG_TEARDOWN,
                    RtspCallback, (void*)p_media );

    p_media->p_vod = p_vod;

    TAB_APPEND( p_sys->i_media, p_sys->media, p_media );

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    vlc_mutex_init( p_vod, &p_media->lock );
    p_media->psz_session_name = strdup("");
    p_media->psz_session_description = strdup("");
    p_media->psz_session_url = strdup("");
    p_media->psz_session_email = strdup("");

    p_media->i_port_audio = 1234;
    p_media->i_port_video = 1236;
    p_media->i_port       = 1238;
    p_media->i_payload_type = 96;

    p_media->i_sdp_id = mdate();
    p_media->i_sdp_version = 1;
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    p_media->i_length = p_item->i_duration;
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    vlc_mutex_lock( &p_item->lock );
    msg_Dbg( p_vod, "media has %i declared ES", p_item->i_es );
    for( i = 0; i < p_item->i_es; i++ )
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    {
        MediaAddES( p_vod, p_media, p_item->es[i] );
    }
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    vlc_mutex_unlock( &p_item->lock );

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    return p_media;
}

static void MediaDel( vod_t *p_vod, vod_media_t *p_media )
{
    vod_sys_t *p_sys = p_vod->p_sys;

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    msg_Dbg( p_vod, "deleting media: %s", p_media->psz_rtsp_path );

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    while( p_media->i_rtsp > 0 ) RtspClientDel( p_media, p_media->rtsp[0] );
    httpd_UrlDelete( p_media->p_rtsp_url );
    if( p_media->psz_rtsp_path ) free( p_media->psz_rtsp_path );
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    if( p_media->psz_rtsp_control_v6 ) free( p_media->psz_rtsp_control_v6 );
    if( p_media->psz_rtsp_control_v4 ) free( p_media->psz_rtsp_control_v4 );
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    TAB_REMOVE( p_sys->i_media, p_sys->media, p_media );
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    while( p_media->i_es ) MediaDelES( p_vod, p_media, &p_media->es[0]->fmt );

    vlc_mutex_destroy( &p_media->lock );
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    free( p_media->psz_session_name );
    free( p_media->psz_session_description );
    free( p_media->psz_session_url );
    free( p_media->psz_session_email );
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    free( p_media );
}

static int MediaAddES( vod_t *p_vod, vod_media_t *p_media, es_format_t *p_fmt )
{
    media_es_t *p_es = malloc( sizeof(media_es_t) );
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    char *psz_urlc;
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    memset( p_es, 0, sizeof(media_es_t) );
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    p_media->psz_mux = NULL;
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    /* TODO: update SDP, etc... */
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    asprintf( &psz_urlc, "%s/trackID=%d",
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              p_media->psz_rtsp_path, p_media->i_es );
    msg_Dbg( p_vod, "  - ES %4.4s (%s)", (char *)&p_fmt->i_codec, psz_urlc );
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    switch( p_fmt->i_codec )
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    {
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        case VLC_FOURCC( 's', '1', '6', 'b' ):
            if( p_fmt->audio.i_channels == 1 && p_fmt->audio.i_rate == 44100 )
            {
                p_es->i_payload_type = 11;
            }
            else if( p_fmt->audio.i_channels == 2 && p_fmt->audio.i_rate == 44100 )
            {
                p_es->i_payload_type = 10;
            }
            else
            {
                p_es->i_payload_type = p_media->i_payload_type++;
            }
            p_es->psz_rtpmap = malloc( strlen( "L16/*/*" ) + 20+1 );
            sprintf( p_es->psz_rtpmap, "L16/%d/%d", p_fmt->audio.i_rate,
                    p_fmt->audio.i_channels );
            break;
        case VLC_FOURCC( 'u', '8', ' ', ' ' ):
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            p_es->i_payload_type = p_media->i_payload_type++;
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            p_es->psz_rtpmap = malloc( strlen( "L8/*/*" ) + 20+1 );
            sprintf( p_es->psz_rtpmap, "L8/%d/%d", p_fmt->audio.i_rate,
                    p_fmt->audio.i_channels );
            break;
        case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
            p_es->i_payload_type = 14;
            p_es->psz_rtpmap = strdup( "MPA/90000" );
            break;
        case VLC_FOURCC( 'm', 'p', 'g', 'v' ):
            p_es->i_payload_type = 32;
            p_es->psz_rtpmap = strdup( "MPV/90000" );
            break;
        case VLC_FOURCC( 'a', '5', '2', ' ' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( "ac3/90000" );
            break;
        case VLC_FOURCC( 'H', '2', '6', '3' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( "H263-1998/90000" );
            break;
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        case VLC_FOURCC( 'h', '2', '6', '4' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( "H264/90000" );
            p_es->psz_fmtp = strdup( "packetization-mode=1" );
            break;
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        case VLC_FOURCC( 'm', 'p', '4', 'v' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( "MP4V-ES/90000" );
            if( p_fmt->i_extra > 0 )
            {
                char *p_hexa = malloc( 2 * p_fmt->i_extra + 1 );
                p_es->psz_fmtp = malloc( 100 + 2 * p_fmt->i_extra );
                sprintf_hexa( p_hexa, p_fmt->p_extra, p_fmt->i_extra );
                sprintf( p_es->psz_fmtp,
                        "profile-level-id=3; config=%s;", p_hexa );
                free( p_hexa );
            }
            break;
        case VLC_FOURCC( 'm', 'p', '4', 'a' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = malloc( strlen( "mpeg4-generic/" ) + 12 );
            sprintf( p_es->psz_rtpmap, "mpeg4-generic/%d", p_fmt->audio.i_rate );
            if( p_fmt->i_extra > 0 )
            {
                char *p_hexa = malloc( 2 * p_fmt->i_extra + 1 );
                p_es->psz_fmtp = malloc( 200 + 2 * p_fmt->i_extra );
                sprintf_hexa( p_hexa, p_fmt->p_extra, p_fmt->i_extra );
                sprintf( p_es->psz_fmtp,
                        "streamtype=5; profile-level-id=15; mode=AAC-hbr; "
                        "config=%s; SizeLength=13;IndexLength=3; "
                        "IndexDeltaLength=3; Profile=1;", p_hexa );
                free( p_hexa );
            }
            break;
        case VLC_FOURCC( 'm', 'p', '2', 't' ):
            p_media->psz_mux = "ts";
            p_es->i_payload_type = 33;
            p_es->psz_rtpmap = strdup( "MP2T/90000" );
            break;
        case VLC_FOURCC( 'm', 'p', '2', 'p' ):
            p_media->psz_mux = "ps";
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( "MP2P/90000" );
            break;
        case VLC_FOURCC( 's', 'a', 'm', 'r' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( p_fmt->audio.i_channels == 2 ?
                                    "AMR/8000/2" : "AMR/8000" );
            p_es->psz_fmtp = strdup( "octet-align=1" );
            break;
        case VLC_FOURCC( 's', 'a', 'w', 'b' ):
            p_es->i_payload_type = p_media->i_payload_type++;
            p_es->psz_rtpmap = strdup( p_fmt->audio.i_channels == 2 ?
                                    "AMR-WB/16000/2" : "AMR-WB/16000" );
            p_es->psz_fmtp = strdup( "octet-align=1" );
            break;
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        default:
            msg_Err( p_vod, "cannot add this stream (unsupported "
                    "codec: %4.4s)", (char*)&p_fmt->i_codec );
            free( p_es );
            return VLC_EGENERIC;
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    }

    p_es->p_rtsp_url =
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        httpd_UrlNewUnique( p_vod->p_sys->p_rtsp_host, psz_urlc, NULL, NULL,
                            NULL );
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    if( !p_es->p_rtsp_url )
    {
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        msg_Err( p_vod, "cannot create RTSP url (%s)", psz_urlc );
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        free( psz_urlc );
        free( p_es );
        return VLC_EGENERIC;
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    }
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    free( psz_urlc );

    httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_SETUP,
                    RtspCallbackES, (void*)p_es );
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    httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_TEARDOWN,
                    RtspCallbackES, (void*)p_es );
    httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_PLAY,
                    RtspCallbackES, (void*)p_es );
    httpd_UrlCatch( p_es->p_rtsp_url, HTTPD_MSG_PAUSE,
                    RtspCallbackES, (void*)p_es );
537

538
    es_format_Copy( &p_es->fmt, p_fmt );
539 540 541
    p_es->p_vod = p_vod;
    p_es->p_media = p_media;

542
#if 0
543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
    /* Choose the port */
    if( p_fmt->i_cat == AUDIO_ES && p_media->i_port_audio > 0 )
    {
        p_es->i_port = p_media->i_port_audio;
        p_media->i_port_audio = 0;
    }
    else if( p_fmt->i_cat == VIDEO_ES && p_media->i_port_video > 0 )
    {
        p_es->i_port = p_media->i_port_video;
        p_media->i_port_video = 0;
    }
    while( !p_es->i_port )
    {
        if( p_media->i_port != p_media->i_port_audio &&
            p_media->i_port != p_media->i_port_video )
        {
            p_es->i_port = p_media->i_port;
            p_media->i_port += 2;
            break;
        }
        p_media->i_port += 2;
    }
565 566 567 568
#else

    p_es->i_port = 0;
#endif
569 570 571 572 573 574 575

    vlc_mutex_lock( &p_media->lock );
    TAB_APPEND( p_media->i_es, p_media->es, p_es );
    vlc_mutex_unlock( &p_media->lock );

    p_media->i_sdp_version++;

576 577 578 579 580 581
    return VLC_SUCCESS;
}

static void MediaDelES( vod_t *p_vod, vod_media_t *p_media, es_format_t *p_fmt)
{
    media_es_t *p_es = 0;
582 583 584 585 586 587 588 589 590 591 592 593 594
    int i;

    /* Find the ES */
    for( i = 0; i < p_media->i_es; i++ )
    {
        if( p_media->es[i]->fmt.i_cat == p_fmt->i_cat &&
            p_media->es[i]->fmt.i_codec == p_fmt->i_codec &&
            p_media->es[i]->fmt.i_id == p_fmt->i_id )
        {
            p_es = p_media->es[i];
        }
    }
    if( !p_es ) return;
595

596 597 598
    msg_Dbg( p_vod, "  - Removing ES %4.4s", (char *)&p_fmt->i_codec );

    vlc_mutex_lock( &p_media->lock );
599
    TAB_REMOVE( p_media->i_es, p_media->es, p_es );
600
    vlc_mutex_unlock( &p_media->lock );
601

602 603 604
    if( p_es->psz_rtpmap ) free( p_es->psz_rtpmap );
    if( p_es->psz_fmtp ) free( p_es->psz_fmtp );
    p_media->i_sdp_version++;
605 606

    if( p_es->p_rtsp_url ) httpd_UrlDelete( p_es->p_rtsp_url );
607
    es_format_Clean( &p_es->fmt );
608 609 610 611 612 613 614
}

/****************************************************************************
 * RTSP server implementation
 ****************************************************************************/
static rtsp_client_t *RtspClientNew( vod_media_t *p_media, char *psz_session )
{
615
    rtsp_client_t *p_rtsp = malloc( sizeof(rtsp_client_t) );
616 617

    if( !p_rtsp ) return NULL;
618 619
    memset( p_rtsp, 0, sizeof(rtsp_client_t) );
    p_rtsp->es = 0;
620

621 622
    p_rtsp->psz_session = psz_session;
    TAB_APPEND( p_media->i_rtsp, p_media->rtsp, p_rtsp );
623

624 625
    p_media->p_vod->p_sys->i_connections++;
    msg_Dbg( p_media->p_vod, "new session: %s, connections: %d",
626
             psz_session, p_media->p_vod->p_sys->i_throttle_users );
627

628
    return p_rtsp;
629 630 631 632 633 634
}

static rtsp_client_t *RtspClientGet( vod_media_t *p_media, char *psz_session )
{
    int i;

635
    for( i = 0; psz_session && i < p_media->i_rtsp; i++ )
636 637 638 639 640 641 642 643 644 645
    {
        if( !strcmp( p_media->rtsp[i]->psz_session, psz_session ) )
        {
            return p_media->rtsp[i];
        }
    }

    return NULL;
}

646
static void RtspClientDel( vod_media_t *p_media, rtsp_client_t *p_rtsp )
647
{
648 649
    p_media->p_vod->p_sys->i_connections--;
    msg_Dbg( p_media->p_vod, "closing session: %s, connections: %d",
650
             p_rtsp->psz_session, p_media->p_vod->p_sys->i_throttle_users );
651

652 653
    while( p_rtsp->i_es-- )
    {
654 655 656 657
        if( p_rtsp->es[p_rtsp->i_es]->psz_ip )
            free( p_rtsp->es[p_rtsp->i_es]->psz_ip );
        free( p_rtsp->es[p_rtsp->i_es] );
        if( !p_rtsp->i_es ) free( p_rtsp->es );
658 659
    }

660
    TAB_REMOVE( p_media->i_rtsp, p_media->rtsp, p_rtsp );
661

662 663
    free( p_rtsp->psz_session );
    free( p_rtsp );
664 665 666 667 668 669 670
}

static int RtspCallback( httpd_callback_sys_t *p_args, httpd_client_t *cl,
                         httpd_message_t *answer, httpd_message_t *query )
{
    vod_media_t *p_media = (vod_media_t*)p_args;
    vod_t *p_vod = p_media->p_vod;
671
    char *psz_transport = NULL;
672
    char *psz_playnow = NULL; /* support option: x-playNow */
673
    char *psz_session = NULL;
674
    char *psz_cseq = NULL;
675
    rtsp_client_t *p_rtsp;
676
    int i_port = 0;
677
    int i_cseq = 0;
678 679 680

    if( answer == NULL || query == NULL ) return VLC_SUCCESS;

681
    msg_Dbg( p_vod, "RtspCallback query: type=%d", query->i_type );
682 683 684 685

    answer->i_proto   = HTTPD_PROTO_RTSP;
    answer->i_version = query->i_version;
    answer->i_type    = HTTPD_MSG_ANSWER;
686 687
    answer->i_body    = 0;
    answer->p_body      = NULL;
688 689 690

    switch( query->i_type )
    {
691 692
        case HTTPD_MSG_SETUP:
        {
693
            psz_playnow = httpd_MsgGet( query, "x-playNow" );
694 695 696 697 698 699 700 701
            psz_transport = httpd_MsgGet( query, "Transport" );
            msg_Dbg( p_vod, "HTTPD_MSG_SETUP: transport=%s", psz_transport );

            if( strstr( psz_transport, "unicast" ) &&
                strstr( psz_transport, "client_port=" ) )
            {
                rtsp_client_t *p_rtsp;
                char ip[NI_MAXNUMERICHOST];
702
                i_port = atoi( strstr( psz_transport, "client_port=" ) +
703 704
                                strlen("client_port=") );

705 706 707
                if( strstr( psz_transport, "MP2T/H2221/UDP" ) ||
                    strstr( psz_transport, "RAW/RAW/UDP" ) )
                {
708
                    p_media->psz_mux = p_vod->p_sys->psz_raw_mux;
709
                    p_media->b_raw = VLC_TRUE;
710
                }
711

712 713 714 715 716 717 718 719 720 721
                if( httpd_ClientIP( cl, ip ) == NULL )
                {
                    answer->i_status = 500;
                    answer->psz_status = strdup( "Internal server error" );
                    answer->i_body = 0;
                    answer->p_body = NULL;
                    break;
                }

                msg_Dbg( p_vod, "HTTPD_MSG_SETUP: unicast ip=%s port=%d",
722
                         ip, i_port );
723 724 725 726

                psz_session = httpd_MsgGet( query, "Session" );
                if( !psz_session || !*psz_session )
                {
727 728
                    if( ( p_vod->p_sys->i_throttle_users > 0 ) &&
                        ( p_vod->p_sys->i_connections >= p_vod->p_sys->i_throttle_users ) )
729
                    {
730
                        answer->i_status = 503;
731 732 733 734 735
                        answer->psz_status = strdup( "Too many connections" );
                        answer->i_body = 0;
                        answer->p_body = NULL;
                        break;
                    }
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
                    asprintf( &psz_session, "%d", rand() );
                    p_rtsp = RtspClientNew( p_media, psz_session );
                }
                else
                {
                    p_rtsp = RtspClientGet( p_media, psz_session );
                    if( !p_rtsp )
                    {
                        answer->i_status = 454;
                        answer->psz_status = strdup( "Unknown session id" );
                        answer->i_body = 0;
                        answer->p_body = NULL;
                        break;
                    }
                }

                answer->i_status = 200;
                answer->psz_status = strdup( "OK" );
                answer->i_body = 0;
                answer->p_body = NULL;

757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
                if( p_media->b_raw )
                {
                    if( strstr( psz_transport, "MP2T/H2221/UDP" ) )
                    {
                        httpd_MsgAdd( answer, "Transport", "MP2T/H2221/UDP;client_port=%d-%d",
                                      i_port, i_port + 1 );
                    }
                    else if( strstr( psz_transport, "RAW/RAW/UDP" ) )
                    {
                        httpd_MsgAdd( answer, "Transport", "RAW/RAW/UDP;client_port=%d-%d",
                                      i_port, i_port + 1 );
                    }
                }
                else
                    httpd_MsgAdd( answer, "Transport", "RTP/AVP/UDP;client_port=%d-%d",
                                  i_port, i_port + 1 );
773 774 775 776 777 778 779 780
            }
            else /* TODO  strstr( psz_transport, "interleaved" ) ) */
            {
                answer->i_status = 461;
                answer->psz_status = strdup( "Unsupported Transport" );
                answer->i_body = 0;
                answer->p_body = NULL;
            }
781

782 783
            /* Intentional fall-through on x-playNow option in RTSP request */
            if( !psz_playnow )
784
                break;
785 786 787 788
        }

        case HTTPD_MSG_PLAY:
        {
789
            char *psz_output, ip[NI_MAXNUMERICHOST];
790
            int i, i_port_audio = 0, i_port_video = 0;
791 792

            /* for now only multicast so easy */
793 794 795 796 797 798 799
            if( !psz_playnow )
            {
                answer->i_status = 200;
                answer->psz_status = strdup( "OK" );
                answer->i_body = 0;
                answer->p_body = NULL;
            }
800

801 802
            if( !psz_session )
                psz_session = httpd_MsgGet( query, "Session" );
803 804
            msg_Dbg( p_vod, "HTTPD_MSG_PLAY for session: %s", psz_session );

805 806 807
            p_rtsp = RtspClientGet( p_media, psz_session );
            if( !p_rtsp ) break;

808 809 810
            if( p_rtsp->b_playing )
            {
                char *psz_position = httpd_MsgGet( query, "Range" );
811
                char *psz_scale = httpd_MsgGet( query, "Scale" );
812
                if( psz_position ) psz_position = strstr( psz_position, "npt=" );
813
                if( psz_position && !psz_scale )
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
                {
                    double f_pos;
                    char *end;

                    msg_Dbg( p_vod, "seeking request: %s", psz_position );
                    psz_position += 4;
                    /* FIXME: npt= is not necessarily formatted as a float */
                    f_pos = us_strtod( psz_position, &end );
                    if( end > psz_position )
                    {
                        f_pos /= ((double)(p_media->i_length))/1000 /1000 / 100;
                        vod_MediaControl( p_vod, p_media, psz_session,
                                      VOD_MEDIA_SEEK, f_pos );
                    }
                    break;
                }
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860
                if( psz_scale )
                {
                    double f_scale = 0.0;
                    char *end;

                    f_scale = us_strtod( psz_scale, &end );
                    if( end > psz_scale )
                    {
                        f_scale = (f_scale * 30.0);
                        if( psz_scale[0] == '-' ) /* rewind */
                        {
                            msg_Dbg( p_vod, "rewind request: %s", psz_scale );
                            vod_MediaControl( p_vod, p_media, psz_session,
                                                VOD_MEDIA_REWIND, f_scale );
                        }
                        else if(psz_scale[0] != '1' ) /* fast-forward */
                        {
                            msg_Dbg( p_vod, "fastforward request: %s", psz_scale );
                            vod_MediaControl( p_vod, p_media, psz_session,
                                                VOD_MEDIA_FORWARD, f_scale );
                        }

                        if( p_rtsp->b_paused == VLC_TRUE )
                        {
                            p_rtsp->b_paused = VLC_FALSE;
                            vod_MediaControl( p_vod, p_media, psz_session,
                                                VOD_MEDIA_PAUSE, psz_output );
                        }
                    }
                    break;
                }
861 862
            }

863 864 865 866 867 868 869 870 871
            if( p_rtsp->b_playing && p_rtsp->b_paused )
            {
                vod_MediaControl( p_vod, p_media, psz_session,
                                  VOD_MEDIA_PAUSE );
                p_rtsp->b_paused = VLC_FALSE;
                break;
            }
            else if( p_rtsp->b_playing ) break;

872
            if( httpd_ClientIP( cl, ip ) == NULL ) break;
873

874
            p_rtsp->b_playing = VLC_TRUE;
875 876

            /* FIXME for != 1 video and 1 audio */
877
            for( i = 0; i < p_rtsp->i_es; i++ )
878
            {
879 880 881 882
                if( p_rtsp->es[i]->p_media_es->fmt.i_cat == AUDIO_ES )
                    i_port_audio = p_rtsp->es[i]->i_port;
                if( p_rtsp->es[i]->p_media_es->fmt.i_cat == VIDEO_ES )
                    i_port_video = p_rtsp->es[i]->i_port;
883
            }
884

885 886
            if( p_media->psz_mux )
            {
887 888 889 890 891 892 893 894 895 896
                if( p_media->b_raw )
                {
                    asprintf( &psz_output, "std{access=udp,dst=%s:%i,mux=%s}",
                              ip, i_port, p_media->psz_mux );
                }
                else
                {
                    asprintf( &psz_output, "rtp{dst=%s,port=%i,mux=%s}",
                              ip, i_port_video, p_media->psz_mux );
                }
897 898 899 900 901 902 903
            }
            else
            {
                asprintf( &psz_output, "rtp{dst=%s,port-video=%i,"
                          "port-audio=%i}", ip, i_port_video, i_port_audio );
            }

904 905 906
            vod_MediaControl( p_vod, p_media, psz_session, VOD_MEDIA_PLAY,
                              psz_output );
            free( psz_output );
907 908 909
            break;
        }

910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
        case HTTPD_MSG_DESCRIBE:
        {
            char *psz_sdp =
                SDPGenerate( p_media, cl );

            if( psz_sdp != NULL )
            {
                answer->i_status = 200;
                answer->psz_status = strdup( "OK" );
                httpd_MsgAdd( answer, "Content-type",  "%s", "application/sdp" );

                answer->p_body = (uint8_t *)psz_sdp;
                answer->i_body = strlen( psz_sdp );
            }
            else
            {
                answer->i_status = 500;
                answer->psz_status = strdup( "Internal server error" );
                answer->p_body = NULL;
                answer->i_body = 0;
            }
            break;
        }

934 935 936
        case HTTPD_MSG_PAUSE:
            psz_session = httpd_MsgGet( query, "Session" );
            msg_Dbg( p_vod, "HTTPD_MSG_PAUSE for session: %s", psz_session );
937

938 939 940
            p_rtsp = RtspClientGet( p_media, psz_session );
            if( !p_rtsp ) break;

941
            vod_MediaControl( p_vod, p_media, psz_session, VOD_MEDIA_PAUSE );
942
            p_rtsp->b_paused = VLC_TRUE;
943 944 945 946 947 948

            answer->i_status = 200;
            answer->psz_status = strdup( "OK" );
            answer->i_body = 0;
            answer->p_body = NULL;
            break;
949 950 951 952 953 954 955 956 957 958 959

        case HTTPD_MSG_TEARDOWN:
            /* for now only multicast so easy again */
            answer->i_status = 200;
            answer->psz_status = strdup( "OK" );
            answer->i_body = 0;
            answer->p_body = NULL;

            psz_session = httpd_MsgGet( query, "Session" );
            msg_Dbg( p_vod, "HTTPD_MSG_TEARDOWN for session: %s", psz_session);

960 961
            p_rtsp = RtspClientGet( p_media, psz_session );
            if( !p_rtsp ) break;
962 963

            vod_MediaControl( p_vod, p_media, psz_session, VOD_MEDIA_STOP );
964
            RtspClientDel( p_media, p_rtsp );
965 966
            break;

967 968 969 970 971 972 973
        case HTTPD_MSG_GETPARAMETER:
            answer->i_status = 200;
            answer->psz_status = strdup( "OK" );
            answer->i_body = 0;
            answer->p_body = NULL;
            break;

974 975 976 977 978 979
        default:
            return VLC_EGENERIC;
    }

    httpd_MsgAdd( answer, "Server", "VLC Server" );
    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
980 981
    psz_cseq = httpd_MsgGet( query, "Cseq" );
    psz_cseq ? i_cseq = atoi( psz_cseq ) : 0;
982
    httpd_MsgAdd( answer, "CSeq", "%d", i_cseq );
983 984 985 986 987 988 989 990 991 992
    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );

    if( psz_session )
    {
        httpd_MsgAdd( answer, "Session", "%s;timeout=5", psz_session );
    }

    return VLC_SUCCESS;
}

993
static int RtspCallbackES( httpd_callback_sys_t *p_args, httpd_client_t *cl,
994 995
                           httpd_message_t *answer, httpd_message_t *query )
{
996 997
    media_es_t *p_es = (media_es_t*)p_args;
    vod_media_t *p_media = p_es->p_media;
998
    vod_t *p_vod = p_media->p_vod;
999
    rtsp_client_t *p_rtsp = NULL;
1000
    char *psz_transport = NULL;
1001 1002
    char *psz_playnow = NULL; /* support option: x-playNow */
    char *psz_session = NULL;
1003
    char *psz_position = NULL;
1004 1005
    char *psz_cseq = NULL;
    int i_cseq = 0;
1006
    int i;
1007 1008 1009

    if( answer == NULL || query == NULL ) return VLC_SUCCESS;

1010
    msg_Dbg( p_vod, "RtspCallback query: type=%d", query->i_type );
1011 1012 1013 1014

    answer->i_proto   = HTTPD_PROTO_RTSP;
    answer->i_version = query->i_version;
    answer->i_type    = HTTPD_MSG_ANSWER;
1015 1016
    answer->i_body    = 0;
    answer->p_body      = NULL;
1017 1018 1019

    switch( query->i_type )
    {
1020 1021 1022
        case HTTPD_MSG_SETUP:
            psz_playnow = httpd_MsgGet( query, "x-playNow" );
            psz_transport = httpd_MsgGet( query, "Transport" );
1023

1024
            msg_Dbg( p_vod, "HTTPD_MSG_SETUP: transport=%s", psz_transport );
1025

1026 1027
            if( strstr( psz_transport, "unicast" ) &&
                strstr( psz_transport, "client_port=" ) )
1028
            {
1029 1030 1031 1032 1033
                rtsp_client_t *p_rtsp;
                rtsp_client_es_t *p_rtsp_es;
                char ip[NI_MAXNUMERICHOST];
                int i_port = atoi( strstr( psz_transport, "client_port=" ) +
                                strlen("client_port=") );
1034

1035
                if( httpd_ClientIP( cl, ip ) == NULL )
1036
                {
1037 1038
                    answer->i_status = 500;
                    answer->psz_status = strdup( "Internal server error" );
1039 1040 1041 1042 1043
                    answer->i_body = 0;
                    answer->p_body = NULL;
                    break;
                }

1044 1045
                msg_Dbg( p_vod, "HTTPD_MSG_SETUP: unicast ip=%s port=%d",
                        ip, i_port );
1046

1047 1048 1049
                psz_session = httpd_MsgGet( query, "Session" );
                if( !psz_session || !*psz_session )
                {
1050 1051
                    if( ( p_vod->p_sys->i_throttle_users > 0 ) &&
                        ( p_vod->p_sys->i_connections >= p_vod->p_sys->i_throttle_users ) )
1052
                    {
1053
                        answer->i_status = 503;
1054 1055 1056 1057 1058
                        answer->psz_status = strdup( "Too many connections" );
                        answer->i_body = 0;
                        answer->p_body = NULL;
                        break;
                    }
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
                    asprintf( &psz_session, "%d", rand() );
                    p_rtsp = RtspClientNew( p_media, psz_session );
                }
                else
                {
                    p_rtsp = RtspClientGet( p_media, psz_session );
                    if( !p_rtsp )
                    {
                        answer->i_status = 454;
                        answer->psz_status = strdup( "Unknown session id" );
                        answer->i_body = 0;
                        answer->p_body = NULL;
                        break;
                    }
                }
1074

1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
                p_rtsp_es = malloc( sizeof(rtsp_client_es_t) );
                p_rtsp_es->i_port = i_port;
                p_rtsp_es->psz_ip = strdup( ip );
                p_rtsp_es->p_media_es = p_es;
                TAB_APPEND( p_rtsp->i_es, p_rtsp->es, p_rtsp_es );

                answer->i_status = 200;
                answer->psz_status = strdup( "OK" );
                answer->i_body = 0;
                answer->p_body = NULL;

1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
                if( p_media->b_raw )
                {
                    if( strstr( psz_transport, "MP2T/H2221/UDP" ) )
                    {
                        httpd_MsgAdd( answer, "Transport", "MP2T/H2221/UDP;client_port=%d-%d",
                                      i_port, i_port + 1 );
                    }
                    else if( strstr( psz_transport, "RAW/RAW/UDP" ) )
                    {
                        httpd_MsgAdd( answer, "Transport", "RAW/RAW/UDP;client_port=%d-%d",
                                      i_port, i_port + 1 );
                    }
                }
                else
                {
                    httpd_MsgAdd( answer, "Transport", "RTP/AVP/UDP;client_port=%d-%d",
                                  i_port, i_port + 1 );
                }
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            }
            else /* TODO  strstr( psz_transport, "interleaved" ) ) */
            {
                answer->i_status = 461;
                answer->psz_status = strdup( "Unsupported Transport" );
                answer->i_body = 0;
                answer->p_body = NULL;
            }
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            /* Intentional fall-through on x-playNow option in RTSP request */
            if( !psz_playnow )
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                break;
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        case HTTPD_MSG_PLAY:
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            /* This is kind of a kludge. Should we only support Aggregate
             * Operations ? */
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            psz_session = httpd_MsgGet( query, "Session" );
            msg_Dbg( p_vod, "HTTPD_MSG_PLAY for session: %s", psz_session );

            p_rtsp = RtspClientGet( p_media, psz_session );

            psz_position = httpd_MsgGet( query, "Range" );
            if( psz_position ) psz_position = strstr( psz_position, "npt=" );
            if( psz_position )
            {
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                double f_pos;
                char *end;
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                msg_Dbg( p_vod, "seeking request: %s", psz_position );

                psz_position += 4;
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                /* FIXME: npt= is not necessarily formatted as a float */
                f_pos = us_strtod( psz_position, &end );
                if( end > psz_position )
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                {
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                    f_pos /= ((double)(p_media->i_length))/1000 /1000 / 100;
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                    vod_MediaControl( p_vod, p_media, psz_session,
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                                      VOD_MEDIA_SEEK, f_pos );
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                }
            }

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            if( !psz_playnow )
            {
                answer->i_status = 200;
                answer->psz_status = strdup( "OK" );
                answer->i_body = 0;
                answer->p_body = NULL;
            }
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            break;

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        case HTTPD_MSG_TEARDOWN:
            answer->i_status = 200;
            answer->psz_status = strdup( "OK" );
            answer->i_body = 0;
            answer->p_body = NULL;

            psz_session = httpd_MsgGet( query, "Session" );
            msg_Dbg( p_vod, "HTTPD_MSG_TEARDOWN for session: %s", psz_session);

            p_rtsp = RtspClientGet( p_media, psz_session );
            if( !p_rtsp ) break;

            for( i = 0; i < p_rtsp->i_es; i++ )
            {
                if( p_rtsp->es[i]->p_media_es == p_es )
                {
                    if( p_rtsp->es[i]->psz_ip ) free( p_rtsp->es[i]->psz_ip );
                    TAB_REMOVE( p_rtsp->i_es, p_rtsp->es, p_rtsp->es[i] );
                    break;
                }
            }

            if( !p_rtsp->i_es )
            {
                vod_MediaControl( p_vod, p_media, psz_session,
                                  VOD_MEDIA_STOP );
                RtspClientDel( p_media, p_rtsp );
            }
            break;

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        case HTTPD_MSG_PAUSE:
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            /* This is kind of a kludge. Should we only support Aggregate
             * Operations ? */
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            psz_session = httpd_MsgGet( query, "Session" );
            msg_Dbg( p_vod, "HTTPD_MSG_PAUSE for session: %s", psz_session );

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            p_rtsp = RtspClientGet( p_media, psz_session );
            if( !p_rtsp ) break;

            vod_MediaControl( p_vod, p_media, psz_session, VOD_MEDIA_PAUSE );
            p_rtsp->b_paused = VLC_TRUE;

            answer->i_status = 200;
            answer->psz_status = strdup( "OK" );
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            answer->i_body = 0;
            answer->p_body = NULL;
            break;

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        default:
            return VLC_EGENERIC;
            break;
    }

    httpd_MsgAdd( answer, "Server", "VLC Server" );
    httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
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    psz_cseq = httpd_MsgGet( query, "Cseq" );
    if (psz_cseq)
        i_cseq = atoi( psz_cseq );
    else
        i_cseq = 0;
    httpd_MsgAdd( answer, "Cseq", "%d", i_cseq );
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    httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );

    if( psz_session )
        httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * SDPGenerate: TODO
 * FIXME: need to be moved to a common place ?
 *****************************************************************************/
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static char *SDPGenerate( const vod_media_t *p_media, httpd_client_t *cl )
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{
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    int i, i_size;
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    char *p, *psz_sdp, ip[NI_MAXNUMERICHOST], ipv;
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    const char *psz_control;
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    if( httpd_ServerIP( cl, ip ) == NULL )
        return NULL;

    p = strchr( ip, '%' );
    if( p != NULL )
        *p = '\0'; /* remove scope if present */

    ipv = ( strchr( ip, ':' ) != NULL ) ? '6' : '4';
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    /* Calculate size */
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    i_size = sizeof( "v=0\r\n" ) +
        sizeof( "o=- * * IN IP4 \r\n" ) + 10 + NI_MAXNUMERICHOST +
        sizeof( "s=*\r\n" ) + strlen( p_media->psz_session_name ) +
        sizeof( "i=*\r\n" ) + strlen( p_media->psz_session_description ) +
        sizeof( "u=*\r\n" ) + strlen( p_media->psz_session_url ) +
        sizeof( "e=*\r\n" ) + strlen( p_media->psz_session_email ) +
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        sizeof( "c=IN IP4 0.0.0.0\r\n" ) + 20 + 10 +
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        sizeof( "t=0 0\r\n" ) + /* FIXME */
        sizeof( "a=tool:"PACKAGE_STRING"\r\n" ) +
        sizeof( "a=range:npt=0-1000000000.000\r\n" );
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    psz_control = (ipv == '6') ? p_media->psz_rtsp_control_v6
                               : p_media->psz_rtsp_control_v4;
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    for( i = 0; i < p_media->i_es; i++ )
    {
        media_es_t *p_es = p_media->es[i];

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        i_size += sizeof( "m=**d*o * RTP/AVP *\r\n" ) + 19;
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        if( p_es->psz_rtpmap )
        {
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            i_size += sizeof( "a=rtpmap:* *\r\n" ) +
                strlen( p_es->psz_rtpmap ) + 9;
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        }
        if( p_es->psz_fmtp )
        {
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            i_size += sizeof( "a=fmtp:* *\r\n" ) +
                strlen( p_es->psz_fmtp ) + 9;
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        }
    }
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    i_size += (strlen( psz_control ) + strlen( ip ) + 9) * p_media->i_es;
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    p = psz_sdp = malloc( i_size );
    p += sprintf( p, "v=0\r\n" );
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    p += sprintf( p, "o=- "I64Fd" %d IN IP%c %s\r\n",
                  p_media->i_sdp_id, p_media->i_sdp_version, ipv, ip );
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    if( *p_media->psz_session_name )
        p += sprintf( p, "s=%s\r\n", p_media->psz_session_name );
    if( *p_media->psz_session_description )
        p += sprintf( p, "i=%s\r\n", p_media->psz_session_description );
    if( *p_media->psz_session_url )
        p += sprintf( p, "u=%s\r\n", p_media->psz_session_url );
    if( *p_media->psz_session_email )
        p += sprintf( p, "e=%s\r\n", p_media->psz_session_email );

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    p += sprintf( p, "c=IN IP%c %s\r\n", ipv, ipv == '6' ? "::" : "0.0.0.0" );
    p += sprintf( p, "t=0 0\r\n" ); /* FIXME */
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    p += sprintf( p, "a=tool:"PACKAGE_STRING"\r\n" );
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    if( p_media->i_length > 0 )
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    {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
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        lldiv_t d = lldiv( p_media->i_length / 1000, 1000 );
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        p += sprintf( p, "a=range:npt=0-%lld.%03u\r\n", d.quot,
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                      (unsigned)d.rem );
    }
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    for( i = 0; i < p_media->i_es; i++ )
    {
        media_es_t *p_es = p_media->es[i];

        if( p_es->fmt.i_cat == AUDIO_ES )
        {
            p += sprintf( p, "m=audio %d RTP/AVP %d\r\n",
                          p_es->i_port, p_es->i_payload_type );
        }
        else if( p_es->fmt.i_cat == VIDEO_ES )
        {
            p += sprintf( p, "m=video %d RTP/AVP %d\r\n",
                          p_es->i_port, p_es->i_payload_type );
        }
        else
        {
            continue;
        }

        if( p_es->psz_rtpmap )
        {
            p += sprintf( p, "a=rtpmap:%d %s\r\n", p_es->i_payload_type,
                          p_es->psz_rtpmap );
        }
        if( p_