mmsh.c

vlc源码

/*****************************************************************************
 * mmsh.c:
 *****************************************************************************
 * Copyright (C) 2001, 2002 the VideoLAN team
 * $Id: 87bb09b4382ddddb8dd460d6f029338c874523f5 $
 *
 * Authors: Laurent Aimar <[e-mail]>
 *
 * 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
 *****************************************************************************/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <vlc_common.h>
#include <vlc_access.h>
#include "vlc_strings.h"
#include "vlc_input.h"

#include <vlc_network.h>
#include "vlc_url.h"
#include "asf.h"
#include "buffer.h"

#include "mms.h"
#include "mmsh.h"

/* TODO:
 *  - authentication
 */

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
int  MMSHOpen  ( access_t * );
void MMSHClose ( access_t * );

static ssize_t Read( access_t *, uint8_t *, size_t );
static ssize_t ReadRedirect( access_t *, uint8_t *, size_t );
static int  Seek( access_t *, int64_t );
static int  Control( access_t *, int, va_list );

static int  Describe( access_t  *, char **ppsz_location );
static int  Start( access_t *, int64_t );
static void Stop( access_t * );

static int  GetPacket( access_t *, chunk_t * );
static void GetHeader( access_t *p_access );

static int Restart( access_t * );
static int Reset( access_t * );

//#define MMSH_USER_AGENT "NSPlayer/4.1.0.3856"
#define MMSH_USER_AGENT "NSPlayer/7.10.0.3059"

/****************************************************************************
 * Open: connect to ftp server and ask for file
 ****************************************************************************/
int MMSHOpen( access_t *p_access )
{
    access_sys_t    *p_sys;
    char            *psz_location = NULL;
    char            *psz_proxy;

    /* init p_sys */

    /* Set up p_access */
    p_access->pf_read = Read;
    p_access->pf_block = NULL;
    p_access->pf_control = Control;
    p_access->pf_seek = Seek;
    p_access->info.i_update = 0;
    p_access->info.i_size = 0;
    p_access->info.i_pos = 0;
    p_access->info.b_eof = false;
    p_access->info.i_title = 0;
    p_access->info.i_seekpoint = 0;

    p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
    if( !p_sys )
        return VLC_ENOMEM;

    memset( p_sys, 0, sizeof( access_sys_t ) );
    p_sys->i_proto= MMS_PROTO_HTTP;
    p_sys->fd     = -1;
    p_sys->i_start= 0;

    /* Handle proxy */
    p_sys->b_proxy = false;
    memset( &p_sys->proxy, 0, sizeof(p_sys->proxy) );

    /* Check proxy */
    /* TODO reuse instead http-proxy from http access ? */
    psz_proxy = var_CreateGetString( p_access, "mmsh-proxy" );
    if( !*psz_proxy )
    {
        char *psz_http_proxy = config_GetPsz( p_access, "http-proxy" );
        if( psz_http_proxy && *psz_http_proxy )
        {
            free( psz_proxy );
            psz_proxy = psz_http_proxy;
            var_SetString( p_access, "mmsh-proxy", psz_proxy );
        }
        else
        {
            free( psz_http_proxy );
        }
    }

    if( *psz_proxy )
    {
        p_sys->b_proxy = true;
        vlc_UrlParse( &p_sys->proxy, psz_proxy, 0 );
    }
#ifdef HAVE_GETENV
    else
    {
        char *psz_proxy = getenv( "http_proxy" );
        if( psz_proxy && *psz_proxy )
        {
            p_sys->b_proxy = true;
            vlc_UrlParse( &p_sys->proxy, psz_proxy, 0 );
        }
    }
#endif
    free( psz_proxy );

    if( p_sys->b_proxy )
    {
        if( ( p_sys->proxy.psz_host == NULL ) ||
            ( *p_sys->proxy.psz_host == '\0' ) )
        {
            msg_Warn( p_access, "invalid proxy host" );
            vlc_UrlClean( &p_sys->proxy );
            free( p_sys );
            return VLC_EGENERIC;
        }

        if( p_sys->proxy.i_port <= 0 )
            p_sys->proxy.i_port = 80;
        msg_Dbg( p_access, "Using http proxy %s:%d",
                 p_sys->proxy.psz_host, p_sys->proxy.i_port );
    }

    /* open a tcp connection */
    vlc_UrlParse( &p_sys->url, p_access->psz_path, 0 );
    if( ( p_sys->url.psz_host == NULL ) ||
        ( *p_sys->url.psz_host == '\0' ) )
    {
        msg_Err( p_access, "invalid host" );
        vlc_UrlClean( &p_sys->proxy );
        vlc_UrlClean( &p_sys->url );
        free( p_sys );
        return VLC_EGENERIC;
    }
    if( p_sys->url.i_port <= 0 )
        p_sys->url.i_port = 80;

    if( Describe( p_access, &psz_location ) )
    {
        vlc_UrlClean( &p_sys->proxy );
        vlc_UrlClean( &p_sys->url );
        free( p_sys );
        return VLC_EGENERIC;
    }
    /* Handle redirection */
    if( psz_location && *psz_location )
    {
        msg_Dbg( p_access, "redirection to %s", psz_location );

        input_thread_t * p_input = vlc_object_find( p_access, VLC_OBJECT_INPUT, FIND_PARENT );
        input_item_t * p_new_loc;

        if( !p_input )
            return VLC_EGENERIC;
        /** \bug we do not autodelete here */
        p_new_loc = input_item_New( p_access, psz_location, psz_location );
        input_item_AddSubItem( input_GetItem( p_input ), p_new_loc );
        vlc_gc_decref( p_new_loc );
        vlc_object_release( p_input );

        free( psz_location );

        p_access->pf_read = ReadRedirect;
        return VLC_SUCCESS;
    }

    /* Start playing */
    if( Start( p_access, 0 ) )
    {
        msg_Err( p_access, "cannot start stream" );
        free( p_sys->p_header );
        vlc_UrlClean( &p_sys->proxy );
        vlc_UrlClean( &p_sys->url );
        free( p_sys );
        return VLC_EGENERIC;
    }

    if( !p_sys->b_broadcast )
    {
        p_access->info.i_size = p_sys->asfh.i_file_size;
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Close: free unused data structures
 *****************************************************************************/
void  MMSHClose ( access_t *p_access )
{
    access_sys_t *p_sys = p_access->p_sys;

    Stop( p_access );

    free( p_sys->p_header  );

    vlc_UrlClean( &p_sys->proxy );
    vlc_UrlClean( &p_sys->url );
    free( p_sys );
}

/*****************************************************************************
 * Control:
 *****************************************************************************/
static int Control( access_t *p_access, int i_query, va_list args )
{
    access_sys_t *p_sys = p_access->p_sys;
    bool   *pb_bool;
    bool    b_bool;
    int          *pi_int;
    int64_t      *pi_64;
    int          i_int;

    switch( i_query )
    {
        /* */
        case ACCESS_CAN_SEEK:
            pb_bool = (bool*)va_arg( args, bool* );
            *pb_bool = !p_sys->b_broadcast;
            break;

        case ACCESS_CAN_FASTSEEK:
            pb_bool = (bool*)va_arg( args, bool* );
            *pb_bool = false;
            break;

        case ACCESS_CAN_PAUSE:
        case ACCESS_CAN_CONTROL_PACE:
            pb_bool = (bool*)va_arg( args, bool* );
            *pb_bool = true;
            break;

        /* */
        case ACCESS_GET_MTU:
            pi_int = (int*)va_arg( args, int * );
            *pi_int = 3 * p_sys->asfh.i_min_data_packet_size;
            break;

        case ACCESS_GET_PTS_DELAY:
            pi_64 = (int64_t*)va_arg( args, int64_t * );
            *pi_64 = (int64_t)var_GetInteger( p_access, "mms-caching" ) * INT64_C(1000);
            break;

        case ACCESS_GET_PRIVATE_ID_STATE:
            i_int = (int)va_arg( args, int );
            pb_bool = (bool *)va_arg( args, bool * );

            if( (i_int < 0) || (i_int > 127) )
                return VLC_EGENERIC;
            *pb_bool =  p_sys->asfh.stream[i_int].i_selected ? true : false;
            break;

        /* */
        case ACCESS_SET_PAUSE_STATE:
            b_bool = (bool)va_arg( args, int );
            if( b_bool )
                Stop( p_access );
            else
                Seek( p_access, p_access->info.i_pos );
            break;

        case ACCESS_GET_TITLE_INFO:
        case ACCESS_SET_TITLE:
        case ACCESS_SET_SEEKPOINT:
        case ACCESS_SET_PRIVATE_ID_STATE:
        case ACCESS_GET_CONTENT_TYPE:
            return VLC_EGENERIC;

        default:
            msg_Warn( p_access, "unimplemented query in control" );
            return VLC_EGENERIC;

    }
    return VLC_SUCCESS;
}

/*****************************************************************************
 * Seek: try to go at the right place
 *****************************************************************************/
static int Seek( access_t *p_access, int64_t i_pos )
{
    access_sys_t *p_sys = p_access->p_sys;
    chunk_t      ck;
    off_t        i_offset;
    off_t        i_packet;

    msg_Dbg( p_access, "seeking to %"PRId64, i_pos );

    i_packet = ( i_pos - p_sys->i_header ) / p_sys->asfh.i_min_data_packet_size;
    i_offset = ( i_pos - p_sys->i_header ) % p_sys->asfh.i_min_data_packet_size;

    Stop( p_access );
    Start( p_access, i_packet * p_sys->asfh.i_min_data_packet_size );

    while( vlc_object_alive (p_access) )
    {
        if( GetPacket( p_access, &ck ) )
            break;

        /* skip headers */
        if( ck.i_type != 0x4824 )
            break;

        msg_Warn( p_access, "skipping header" );
    }

    p_access->info.i_pos = i_pos;
    p_access->info.b_eof = false;
    p_sys->i_packet_used += i_offset;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Read:
 *****************************************************************************/
static ssize_t ReadRedirect( access_t *p_access, uint8_t *p, size_t i_len )
{
    return 0;
}

/*****************************************************************************
 * Read:
 *****************************************************************************/
static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
{
    access_sys_t *p_sys = p_access->p_sys;
    size_t       i_copy;
    size_t       i_data = 0;

    if( p_access->info.b_eof )
        return 0;

    while( i_data < (size_t) i_len )
    {
        if( p_access->info.i_pos < (p_sys->i_start + p_sys->i_header) )
        {
            int i_offset = p_access->info.i_pos - p_sys->i_start;
            i_copy = __MIN( p_sys->i_header - i_offset,
                            (int)((size_t)i_len - i_data) );
            memcpy( &p_buffer[i_data], &p_sys->p_header[i_offset], i_copy );

            i_data += i_copy;
            p_access->info.i_pos += i_copy;
        }
        else if( p_sys->i_packet_used < p_sys->i_packet_length )
        {
            i_copy = __MIN( p_sys->i_packet_length - p_sys->i_packet_used,
                            i_len - i_data );
            memcpy( &p_buffer[i_data],
                    &p_sys->p_packet[p_sys->i_packet_used],
                    i_copy );

            i_data += i_copy;
            p_sys->i_packet_used += i_copy;
            p_access->info.i_pos += i_copy;
        }
        else if( (p_sys->i_packet_length > 0) &&
                 ((int)p_sys->i_packet_used < p_sys->asfh.i_min_data_packet_size) )
        {
            i_copy = __MIN( p_sys->asfh.i_min_data_packet_size - p_sys->i_packet_used,
                            i_len - i_data );
            memset( &p_buffer[i_data], 0, i_copy );

            i_data += i_copy;
            p_sys->i_packet_used += i_copy;
            p_access->info.i_pos += i_copy;
        }
        else
        {
            chunk_t ck;
            if( GetPacket( p_access, &ck ) )
            {
                int i_ret = -1;
                if( p_sys->b_broadcast )
                {
                    if( (ck.i_type == 0x4524) && (ck.i_sequence != 0) )
                        i_ret = Restart( p_access );
                    else if( ck.i_type == 0x4324 )
                        i_ret = Reset( p_access );
                }
                if( i_ret )
                {
                    p_access->info.b_eof = true;
                    return 0;
                }
            }
            if( ck.i_type != 0x4424 )
            {
                p_sys->i_packet_used = 0;
                p_sys->i_packet_length = 0;
            }
        }
    }

    return( i_data );
}

/* */
static int Restart( access_t *p_access )
{
    access_sys_t *p_sys = p_access->p_sys;
    char *psz_location = NULL;

    msg_Dbg( p_access, "Restart the stream" );
    p_sys->i_start = p_access->info.i_pos;

    /* */
    msg_Dbg( p_access, "stoping the stream" );
    Stop( p_access );

    /* */
    msg_Dbg( p_access, "describe the stream" );
    if( Describe( p_access, &psz_location ) )
    {
        msg_Err( p_access, "describe failed" );
        return VLC_EGENERIC;
    }
    /* */
    if( Start( p_access, 0 ) )
    {
        msg_Err( p_access, "Start failed" );
        return VLC_EGENERIC;
    }
    return VLC_SUCCESS;
}
static int Reset( access_t *p_access )
{
    access_sys_t *p_sys = p_access->p_sys;
    asf_header_t old_asfh = p_sys->asfh;
    int i;

    msg_Dbg( p_access, "Reset the stream" );
    p_sys->i_start = p_access->info.i_pos;

    /* */
    p_sys->i_packet_sequence = 0;
    p_sys->i_packet_used = 0;
    p_sys->i_packet_length = 0;
    p_sys->p_packet = NULL;

    /* Get the next header FIXME memory loss ? */
    GetHeader( p_access );
    if( p_sys->i_header <= 0 )
        return VLC_EGENERIC;

     asf_HeaderParse ( &p_sys->asfh,
                           p_sys->p_header, p_sys->i_header );
    msg_Dbg( p_access, "packet count=%"PRId64" packet size=%d",
             p_sys->asfh.i_data_packets_count,
             p_sys->asfh.i_min_data_packet_size );

     asf_StreamSelect( &p_sys->asfh,
                           var_CreateGetInteger( p_access, "mms-maxbitrate" ),
                           var_CreateGetInteger( p_access, "mms-all" ),
                           var_CreateGetInteger( p_access, "audio" ),
                           var_CreateGetInteger( p_access, "video" ) );

    /* Check we have comptible asfh */
    for( i = 1; i < 128; i++ )