Beispiel #1
0
/**
 * Subscribe to the message queue.
 * Whenever a message is emitted, a callback will be called.
 * Callback invocation are serialized within a subscription.
 *
 * @param instance LibVLC instance to get messages from
 * @param cb callback function
 * @param opaque data for the callback function
 * @return a subscription pointer, or NULL in case of failure
 */
msg_subscription_t *msg_Subscribe (libvlc_int_t *instance, msg_callback_t cb,
                                   msg_cb_data_t *opaque)
{
    msg_subscription_t *sub = malloc (sizeof (*sub));
    if (sub == NULL)
        return NULL;

    sub->instance = instance;
    sub->func = cb;
    sub->opaque = opaque;
    sub->begin = sub->end = sub->overruns = 0;

    if (vlc_clone (&sub->thread, msg_thread, sub, VLC_THREAD_PRIORITY_LOW))
    {
        free (sub);
        return NULL;
    }

    msg_bank_t *bank = libvlc_bank (instance);
    vlc_mutex_lock (&bank->lock);
    TAB_APPEND (bank->i_sub, bank->pp_sub, sub);
    vlc_mutex_unlock (&bank->lock);

    return sub;
}
Beispiel #2
0
/**
 * Initialize messages queues
 * This function initializes all message queues
 */
void msg_Create (libvlc_int_t *p_libvlc)
{
    libvlc_priv_t *priv = libvlc_priv (p_libvlc);
    msg_bank_t *bank = libvlc_bank (p_libvlc);

    vlc_mutex_init (&bank->lock);
    vlc_cond_init (&bank->wait);
    vlc_dictionary_init( &priv->msg_enabled_objects, 0 );
    priv->msg_all_objects_enabled = true;

    QUEUE.i_sub = 0;
    QUEUE.pp_sub = NULL;

#ifdef UNDER_CE
    QUEUE.logfile =
        CreateFile( L"vlc-log.txt", GENERIC_WRITE,
                    FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
                    CREATE_ALWAYS, 0, NULL );
    SetFilePointer( QUEUE.logfile, 0, NULL, FILE_END );
#endif

    vlc_mutex_lock( &msg_stack_lock );
    if( banks++ == 0 )
        vlc_threadvar_create( &msg_context, cleanup_msg_context );
    vlc_mutex_unlock( &msg_stack_lock );
}
Beispiel #3
0
static void *msg_thread (void *data)
{
    msg_subscription_t *sub = data;
    msg_bank_t *bank = libvlc_bank (sub->instance);

    vlc_mutex_lock (&bank->lock);
    for (;;)
    {
        /* Wait for messages */
        assert (sub->begin < VLC_MSG_QSIZE);
        assert (sub->end < VLC_MSG_QSIZE);
        while (sub->begin != sub->end)
        {
            msg_item_t *msg = sub->items[sub->begin];
            unsigned overruns = sub->overruns;

            if (++sub->begin == VLC_MSG_QSIZE)
                sub->begin = 0;
            sub->overruns = 0;
            vlc_mutex_unlock (&bank->lock);

            sub->func (sub->opaque, msg, overruns);
            msg_Release (msg);

            vlc_mutex_lock (&bank->lock);
        }

        mutex_cleanup_push (&bank->lock);
        vlc_cond_wait (&bank->wait, &bank->lock);
        vlc_cleanup_pop ();
    }
    assert (0);
}
Beispiel #4
0
/**
 * Unsubscribe from the message queue.
 * This function waits for the message callback to return if needed.
 */
void msg_Unsubscribe (msg_subscription_t *sub)
{
    msg_bank_t *bank = libvlc_bank (sub->instance);

    vlc_rwlock_wrlock (&bank->lock);
    TAB_REMOVE (bank->i_sub, bank->pp_sub, sub);
    vlc_rwlock_unlock (&bank->lock);
    free (sub);
}
Beispiel #5
0
void msg_SubscriptionSetVerbosity( msg_subscription_t *sub, const int i_verbosity )
{
    if( i_verbosity < 0 || i_verbosity > 2 ) return;

    msg_bank_t *bank = libvlc_bank ( sub->instance );

    vlc_rwlock_wrlock (&bank->lock);

    sub->verbosity = i_verbosity;

    vlc_rwlock_unlock (&bank->lock);
}
Beispiel #6
0
void msg_DisableObjectPrinting (vlc_object_t *obj, const char * psz_object)
{
    msg_bank_t *bank = libvlc_bank (obj->p_libvlc);

    vlc_rwlock_wrlock (&bank->lock);
    if( !strcmp(psz_object, "all") )
        bank->all_objects_enabled = false;
    else
        vlc_dictionary_insert (&bank->enabled_objects, psz_object,
                               (void *)kObjectPrintingDisabled);
    vlc_rwlock_unlock (&bank->lock);
}
Beispiel #7
0
/**
 * Subscribe to the message queue.
 * Whenever a message is emitted, a callback will be called.
 * Callback invocation are serialized within a subscription.
 *
 * @param instance LibVLC instance to get messages from
 * @param cb callback function
 * @param opaque data for the callback function
 * @return a subscription pointer, or NULL in case of failure
 */
msg_subscription_t *msg_Subscribe (libvlc_int_t *instance, msg_callback_t cb,
                                   msg_cb_data_t *opaque)
{
    msg_subscription_t *sub = malloc (sizeof (*sub));
    if (sub == NULL)
        return NULL;

    sub->instance = instance;
    sub->func = cb;
    sub->opaque = opaque;

    msg_bank_t *bank = libvlc_bank (instance);
    vlc_rwlock_wrlock (&bank->lock);
    TAB_APPEND (bank->i_sub, bank->pp_sub, sub);
    vlc_rwlock_unlock (&bank->lock);

    return sub;
}
Beispiel #8
0
/**
 * Unsubscribe from the message queue.
 * This function waits for the message callback to return if needed.
 */
void msg_Unsubscribe (msg_subscription_t *sub)
{
    msg_bank_t *bank = libvlc_bank (sub->instance);

    /* TODO: flush support? */
    vlc_cancel (sub->thread);
    vlc_mutex_lock (&bank->lock);
    TAB_REMOVE (bank->i_sub, bank->pp_sub, sub);
    vlc_mutex_unlock (&bank->lock);

    vlc_join (sub->thread, NULL);

    /* Free dangling (not flushed) messages. */
    /* NOTE: no locking, only this thread can refer to the subscription now. */
    while (sub->begin != sub->end)
    {
        msg_Release (sub->items[sub->begin]);
        if (++sub->begin == VLC_MSG_QSIZE)
            sub->begin = 0;
    }
    free (sub);
}
Beispiel #9
0
/**
 * Destroy the message queues
 *
 * This functions prints all messages remaining in the queues,
 * then frees all the allocated resources
 * No other messages interface functions should be called after this one.
 */
void msg_Destroy (libvlc_int_t *p_libvlc)
{
    libvlc_priv_t *priv = libvlc_priv (p_libvlc);
    msg_bank_t *bank = libvlc_bank (p_libvlc);

    if( QUEUE.i_sub )
        msg_Err( p_libvlc, "stale interface subscribers (VLC might crash)" );

    vlc_mutex_lock( &msg_stack_lock );
    assert(banks > 0);
    if( --banks == 0 )
        vlc_threadvar_delete( &msg_context );
    vlc_mutex_unlock( &msg_stack_lock );

#ifdef UNDER_CE
    CloseHandle( QUEUE.logfile );
#endif

    vlc_dictionary_clear( &priv->msg_enabled_objects, NULL, NULL );

    vlc_cond_destroy (&bank->wait);
    vlc_mutex_destroy (&bank->lock);
}
Beispiel #10
0
/**
 * Add a message to a queue
 *
 * This function provides basic functionnalities to other msg_* functions.
 * It adds a message to a queue (after having printed all stored messages if it
 * is full). If the message can't be converted to string in memory, it issues
 * a warning.
 */
void msg_GenericVa (vlc_object_t *p_this, int i_type,
                           const char *psz_module,
                           const char *psz_format, va_list _args)
{
    char *       psz_str = NULL;                 /* formatted message string */
    va_list      args;

    assert (p_this);

    if( p_this->i_flags & OBJECT_FLAGS_QUIET ||
        (p_this->i_flags & OBJECT_FLAGS_NODBG && i_type == VLC_MSG_DBG) )
        return;

    msg_bank_t *bank = libvlc_bank (p_this->p_libvlc);
    locale_t locale = uselocale (bank->locale);

#ifndef __GLIBC__
    /* Expand %m to strerror(errno) - only once */
    char buf[strlen( psz_format ) + 2001], *ptr;
    strcpy( buf, psz_format );
    ptr = (char*)buf;
    psz_format = (const char*) buf;

    for( ;; )
    {
        ptr = strchr( ptr, '%' );
        if( ptr == NULL )
            break;

        if( ptr[1] == 'm' )
        {
            char errbuf[2001];
            size_t errlen;

#ifndef WIN32
            strerror_r( errno, errbuf, 1001 );
#else
            int sockerr = WSAGetLastError( );
            if( sockerr )
            {
                strncpy( errbuf, net_strerror( sockerr ), 1001 );
                WSASetLastError( sockerr );
            }
            if ((sockerr == 0)
             || (strcmp ("Unknown network stack error", errbuf) == 0))
                strncpy( errbuf, strerror( errno ), 1001 );
#endif
            errbuf[1000] = 0;

            /* Escape '%' from the error string */
            for( char *percent = strchr( errbuf, '%' );
                 percent != NULL;
                 percent = strchr( percent + 2, '%' ) )
            {
                memmove( percent + 1, percent, strlen( percent ) + 1 );
            }

            errlen = strlen( errbuf );
            memmove( ptr + errlen, ptr + 2, strlen( ptr + 2 ) + 1 );
            memcpy( ptr, errbuf, errlen );
            break; /* Only once, so we don't overflow */
        }

        /* Looks for conversion specifier... */
        do
            ptr++;
        while( *ptr && ( strchr( "diouxXeEfFgGaAcspn%", *ptr ) == NULL ) );
        if( *ptr )
            ptr++; /* ...and skip it */
    }
#endif

    /* Convert message to string  */
    vlc_va_copy( args, _args );
    if( vasprintf( &psz_str, psz_format, args ) == -1 )
        psz_str = NULL;
    va_end( args );

    if( psz_str == NULL )
    {
        int canc = vlc_savecancel (); /* Do not print half of a message... */
#ifdef __GLIBC__
        fprintf( stderr, "main warning: can't store message (%m): " );
#else
        char psz_err[1001];
#ifndef WIN32
        /* we're not using GLIBC, so we are sure that the error description
         * will be stored in the buffer we provide to strerror_r() */
        strerror_r( errno, psz_err, 1001 );
#else
        strncpy( psz_err, strerror( errno ), 1001 );
#endif
        psz_err[1000] = '\0';
        fprintf( stderr, "main warning: can't store message (%s): ", psz_err );
#endif
        vlc_va_copy( args, _args );
        /* We should use utf8_vfprintf - but it calls malloc()... */
        vfprintf( stderr, psz_format, args );
        va_end( args );
        fputs( "\n", stderr );
        vlc_restorecancel (canc);
        uselocale (locale);
        return;
    }
    uselocale (locale);

    /* Fill message information fields */
    msg_item_t msg;

    msg.i_type = i_type;
    msg.i_object_id = (uintptr_t)p_this;
    msg.psz_object_type = p_this->psz_object_type;
    msg.psz_module = psz_module;
    msg.psz_msg = psz_str;
    msg.psz_header = NULL;

    for (vlc_object_t *o = p_this; o != NULL; o = o->p_parent)
        if (o->psz_header != NULL)
        {
            msg.psz_header = o->psz_header;
            break;
        }

    PrintMsg( p_this, &msg );

    vlc_rwlock_rdlock (&bank->lock);
    for (int i = 0; i < bank->i_sub; i++)
    {
        msg_subscription_t *sub = bank->pp_sub[i];
        libvlc_priv_t *priv = libvlc_priv( sub->instance );
        msg_bank_t *bank = priv->msg_bank;
        void *val = vlc_dictionary_value_for_key( &bank->enabled_objects,
                                                  msg.psz_module );
        if( val == kObjectPrintingDisabled ) continue;
        if( val != kObjectPrintingEnabled  ) /*if not allowed */
        {
            val = vlc_dictionary_value_for_key( &bank->enabled_objects,
                                                msg.psz_object_type );
            if( val == kObjectPrintingDisabled ) continue;
            if( val == kObjectPrintingEnabled  ); /* Allowed */
            else if( !bank->all_objects_enabled ) continue;
        }
        switch( msg.i_type )
        {
            case VLC_MSG_INFO:
            case VLC_MSG_ERR:
                if( sub->verbosity < 0 ) continue;
                break;
            case VLC_MSG_WARN:
                if( sub->verbosity < 1 ) continue;
                break;
            case VLC_MSG_DBG:
                if( sub->verbosity < 2 ) continue;
                break;
        }

        sub->func (sub->opaque, &msg);
    }
    vlc_rwlock_unlock (&bank->lock);
    free (msg.psz_msg);
}
Beispiel #11
0
/**
 * Add a message to a queue
 *
 * This function provides basic functionnalities to other msg_* functions.
 * It adds a message to a queue (after having printed all stored messages if it
 * is full). If the message can't be converted to string in memory, it issues
 * a warning.
 */
void msg_GenericVa (vlc_object_t *p_this, int i_type,
                           const char *psz_module,
                           const char *psz_format, va_list _args)
{
    size_t      i_header_size;             /* Size of the additionnal header */
    vlc_object_t *p_obj;
    char *       psz_str = NULL;                 /* formatted message string */
    char *       psz_header = NULL;
    va_list      args;

    assert (p_this);

    if( p_this->i_flags & OBJECT_FLAGS_QUIET ||
        (p_this->i_flags & OBJECT_FLAGS_NODBG && i_type == VLC_MSG_DBG) )
        return;

    msg_bank_t *bank = libvlc_bank (p_this->p_libvlc);
    locale_t locale = uselocale (bank->locale);

#ifndef __GLIBC__
    /* Expand %m to strerror(errno) - only once */
    char buf[strlen( psz_format ) + 2001], *ptr;
    strcpy( buf, psz_format );
    ptr = (char*)buf;
    psz_format = (const char*) buf;

    for( ;; )
    {
        ptr = strchr( ptr, '%' );
        if( ptr == NULL )
            break;

        if( ptr[1] == 'm' )
        {
            char errbuf[2001];
            size_t errlen;

#ifndef WIN32
            strerror_r( errno, errbuf, 1001 );
#else
            int sockerr = WSAGetLastError( );
            if( sockerr )
            {
                strncpy( errbuf, net_strerror( sockerr ), 1001 );
                WSASetLastError( sockerr );
            }
            if ((sockerr == 0)
             || (strcmp ("Unknown network stack error", errbuf) == 0))
                strncpy( errbuf, strerror( errno ), 1001 );
#endif
            errbuf[1000] = 0;

            /* Escape '%' from the error string */
            for( char *percent = strchr( errbuf, '%' );
                 percent != NULL;
                 percent = strchr( percent + 2, '%' ) )
            {
                memmove( percent + 1, percent, strlen( percent ) + 1 );
            }

            errlen = strlen( errbuf );
            memmove( ptr + errlen, ptr + 2, strlen( ptr + 2 ) + 1 );
            memcpy( ptr, errbuf, errlen );
            break; /* Only once, so we don't overflow */
        }

        /* Looks for conversion specifier... */
        do
            ptr++;
        while( *ptr && ( strchr( "diouxXeEfFgGaAcspn%", *ptr ) == NULL ) );
        if( *ptr )
            ptr++; /* ...and skip it */
    }
#endif

    /* Convert message to string  */
    vlc_va_copy( args, _args );
    if( vasprintf( &psz_str, psz_format, args ) == -1 )
        psz_str = NULL;
    va_end( args );

    if( psz_str == NULL )
    {
        int canc = vlc_savecancel (); /* Do not print half of a message... */
#ifdef __GLIBC__
        fprintf( stderr, "main warning: can't store message (%m): " );
#else
        char psz_err[1001];
#ifndef WIN32
        /* we're not using GLIBC, so we are sure that the error description
         * will be stored in the buffer we provide to strerror_r() */
        strerror_r( errno, psz_err, 1001 );
#else
        strncpy( psz_err, strerror( errno ), 1001 );
#endif
        psz_err[1000] = '\0';
        fprintf( stderr, "main warning: can't store message (%s): ", psz_err );
#endif
        vlc_va_copy( args, _args );
        /* We should use utf8_vfprintf - but it calls malloc()... */
        vfprintf( stderr, psz_format, args );
        va_end( args );
        fputs( "\n", stderr );
        vlc_restorecancel (canc);
        uselocale (locale);
        return;
    }
    uselocale (locale);

    msg_item_t * p_item = malloc (sizeof (*p_item));
    if (p_item == NULL)
        return; /* Uho! */

    vlc_gc_init (p_item, msg_Free);
    p_item->psz_module = p_item->psz_msg = p_item->psz_header = NULL;



    i_header_size = 0;
    p_obj = p_this;
    while( p_obj != NULL )
    {
        char *psz_old = NULL;
        if( p_obj->psz_header )
        {
            i_header_size += strlen( p_obj->psz_header ) + 4;
            if( psz_header )
            {
                psz_old = strdup( psz_header );
                psz_header = xrealloc( psz_header, i_header_size );
                snprintf( psz_header, i_header_size , "[%s] %s",
                          p_obj->psz_header, psz_old );
            }
            else
            {
                psz_header = xmalloc( i_header_size );
                snprintf( psz_header, i_header_size, "[%s]",
                          p_obj->psz_header );
            }
        }
        free( psz_old );
        p_obj = p_obj->p_parent;
    }

    /* Fill message information fields */
    p_item->i_type =        i_type;
    p_item->i_object_id =   (uintptr_t)p_this;
    p_item->psz_object_type = p_this->psz_object_type;
    p_item->psz_module =    strdup( psz_module );
    p_item->psz_msg =       psz_str;
    p_item->psz_header =    psz_header;

    PrintMsg( p_this, p_item );

    vlc_rwlock_rdlock (&bank->lock);
    for (int i = 0; i < bank->i_sub; i++)
    {
        msg_subscription_t *sub = bank->pp_sub[i];
        sub->func (sub->opaque, p_item, 0);
    }
    vlc_rwlock_unlock (&bank->lock);
    msg_Release (p_item);
}