X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc%2Fvariables.c;h=df96c3b8d0ef1006bdf98fb4bc8b1a3829e3a8d3;hb=709f415cdf024f565f16df51d1c0378356f23070;hp=91e6964a6c776994cf873551f1551cd2e3002519;hpb=30336bba3f772a1b20a1c5a0663635b1bffc6c68;p=vlc diff --git a/src/misc/variables.c b/src/misc/variables.c index 91e6964a6c..df96c3b8d0 100644 --- a/src/misc/variables.c +++ b/src/misc/variables.c @@ -1,8 +1,8 @@ /***************************************************************************** * variables.c: routines for object variables handling ***************************************************************************** - * Copyright (C) 2002 VideoLAN - * $Id: variables.c,v 1.22 2003/05/04 22:42:18 gbazin Exp $ + * Copyright (C) 2002-2006 the VideoLAN team + * $Id$ * * Authors: Samuel Hocevar * @@ -18,17 +18,22 @@ * * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + #include +#include "variables.h" -#ifdef HAVE_STDLIB_H -# include /* realloc() */ -#endif +#include "libvlc.h" + +#include "vlc_interface.h" /***************************************************************************** * Private types @@ -44,6 +49,10 @@ struct callback_entry_t *****************************************************************************/ static int CmpBool( vlc_value_t v, vlc_value_t w ) { return v.b_bool ? w.b_bool ? 0 : 1 : w.b_bool ? -1 : 0; } static int CmpInt( vlc_value_t v, vlc_value_t w ) { return v.i_int == w.i_int ? 0 : v.i_int > w.i_int ? 1 : -1; } +static int CmpTime( vlc_value_t v, vlc_value_t w ) +{ + return v.i_time == w.i_time ? 0 : v.i_time > w.i_time ? 1 : -1; +} static int CmpString( vlc_value_t v, vlc_value_t w ) { return strcmp( v.psz_string, w.psz_string ); } static int CmpFloat( vlc_value_t v, vlc_value_t w ) { return v.f_float == w.f_float ? 0 : v.f_float > w.f_float ? 1 : -1; } static int CmpAddress( vlc_value_t v, vlc_value_t w ) { return v.p_address == w.p_address ? 0 : v.p_address > w.p_address ? 1 : -1; } @@ -59,20 +68,26 @@ static void DupList( vlc_value_t *p_val ) int i; vlc_list_t *p_list = malloc( sizeof(vlc_list_t) ); + p_list->i_count = p_val->p_list->i_count; if( p_val->p_list->i_count ) { - p_list->i_count = p_val->p_list->i_count; p_list->p_values = malloc( p_list->i_count * sizeof(vlc_value_t) ); p_list->pi_types = malloc( p_list->i_count * sizeof(int) ); } + else + { + p_list->p_values = NULL; + p_list->pi_types = NULL; + } for( i = 0; i < p_list->i_count; i++ ) { p_list->p_values[i] = p_val->p_list->p_values[i]; + p_list->pi_types[i] = p_val->p_list->pi_types[i]; switch( p_val->p_list->pi_types[i] & VLC_VAR_TYPE ) { case VLC_VAR_STRING: - + DupString( &p_list->p_values[i] ); break; default: @@ -125,62 +140,74 @@ static int LookupInner ( variable_t *, int, uint32_t ); static void CheckValue ( variable_t *, vlc_value_t * ); -/***************************************************************************** - * var_Create: initialize a vlc variable - ***************************************************************************** +static int InheritValue( vlc_object_t *, const char *, vlc_value_t *, + int ); + +/** + * Initialize a vlc variable + * * We hash the given string and insert it into the sorted list. The insertion * may require slow memory copies, but think about what we gain in the log(n) * lookup phase when setting/getting the variable value! - *****************************************************************************/ + * + * \param p_this The object in which to create the variable + * \param psz_name The name of the variable + * \param i_type The variables type. Must be one of \ref var_type combined with + * zero or more \ref var_flags + */ int __var_Create( vlc_object_t *p_this, const char *psz_name, int i_type ) { int i_new; variable_t *p_var; static vlc_list_t dummy_null_list = {0, NULL, NULL}; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); /* FIXME: if the variable already exists, we don't duplicate it. But we * duplicate the lookups. It's not that serious, but if anyone finds some * time to rework Insert() so that only one lookup has to be done, feel * free to do so. */ - i_new = Lookup( p_this->p_vars, p_this->i_vars, psz_name ); + i_new = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); if( i_new >= 0 ) { /* If the types differ, variable creation failed. */ - if( i_type != p_this->p_vars[i_new].i_type ) + if( (i_type & ~(VLC_VAR_DOINHERIT|VLC_VAR_ISCOMMAND)) != p_priv->p_vars[i_new].i_type ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_EBADVAR; } - p_this->p_vars[i_new].i_usage++; - vlc_mutex_unlock( &p_this->var_lock ); + p_priv->p_vars[i_new].i_usage++; + if( i_type & VLC_VAR_ISCOMMAND ) + p_priv->p_vars[i_new].i_type |= VLC_VAR_ISCOMMAND; + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } - i_new = Insert( p_this->p_vars, p_this->i_vars, psz_name ); + i_new = Insert( p_priv->p_vars, p_priv->i_vars, psz_name ); - if( (p_this->i_vars & 15) == 15 ) + if( (p_priv->i_vars & 15) == 15 ) { - p_this->p_vars = realloc( p_this->p_vars, - (p_this->i_vars+17) * sizeof(variable_t) ); + p_priv->p_vars = realloc( p_priv->p_vars, + (p_priv->i_vars+17) * sizeof(variable_t) ); } - memmove( p_this->p_vars + i_new + 1, - p_this->p_vars + i_new, - (p_this->i_vars - i_new) * sizeof(variable_t) ); + memmove( p_priv->p_vars + i_new + 1, + p_priv->p_vars + i_new, + (p_priv->i_vars - i_new) * sizeof(variable_t) ); - p_this->i_vars++; + p_priv->i_vars++; - p_var = &p_this->p_vars[i_new]; + p_var = &p_priv->p_vars[i_new]; + memset( p_var, 0, sizeof(*p_var) ); p_var->i_hash = HashString( psz_name ); p_var->psz_name = strdup( psz_name ); p_var->psz_text = NULL; - p_var->i_type = i_type; + p_var->i_type = i_type & ~VLC_VAR_DOINHERIT; memset( &p_var->val, 0, sizeof(vlc_value_t) ); p_var->pf_dup = DupDummy; @@ -208,6 +235,7 @@ int __var_Create( vlc_object_t *p_this, const char *psz_name, int i_type ) p_var->val.b_bool = VLC_FALSE; break; case VLC_VAR_INTEGER: + case VLC_VAR_HOTKEY: p_var->pf_cmp = CmpInt; p_var->val.i_int = 0; break; @@ -219,14 +247,15 @@ int __var_Create( vlc_object_t *p_this, const char *psz_name, int i_type ) p_var->pf_cmp = CmpString; p_var->pf_dup = DupString; p_var->pf_free = FreeString; - p_var->val.psz_string = ""; + p_var->val.psz_string = strdup( "" ); break; case VLC_VAR_FLOAT: p_var->pf_cmp = CmpFloat; p_var->val.f_float = 0.0; break; case VLC_VAR_TIME: - /* FIXME: TODO */ + p_var->pf_cmp = CmpTime; + p_var->val.i_time = 0; break; case VLC_VAR_ADDRESS: p_var->pf_cmp = CmpAddress; @@ -249,37 +278,68 @@ int __var_Create( vlc_object_t *p_this, const char *psz_name, int i_type ) /* Duplicate the default data we stored. */ p_var->pf_dup( &p_var->val ); - vlc_mutex_unlock( &p_this->var_lock ); + if( i_type & VLC_VAR_DOINHERIT ) + { + vlc_value_t val; + + if( InheritValue( p_this, psz_name, &val, p_var->i_type ) + == VLC_SUCCESS ) + { + /* Free data if needed */ + p_var->pf_free( &p_var->val ); + /* Set the variable */ + p_var->val = val; + + if( i_type & VLC_VAR_HASCHOICE ) + { + /* We must add the inherited value to our choice list */ + p_var->i_default = 0; + + INSERT_ELEM( p_var->choices.p_values, p_var->choices.i_count, + 0, val ); + INSERT_ELEM( p_var->choices_text.p_values, + p_var->choices_text.i_count, 0, val ); + p_var->pf_dup( &p_var->choices.p_values[0] ); + p_var->choices_text.p_values[0].psz_string = NULL; + } + } + } + + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } -/***************************************************************************** - * var_Destroy: destroy a vlc variable - ***************************************************************************** +/** + * Destroy a vlc variable + * * Look for the variable and destroy it if it is found. As in var_Create we * do a call to memmove() but we have performance counterparts elsewhere. - *****************************************************************************/ + * + * \param p_this The object that holds the variable + * \param psz_name The name of the variable + */ int __var_Destroy( vlc_object_t *p_this, const char *psz_name ) { int i_var, i; variable_t *p_var; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); i_var = GetUnused( p_this, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return i_var; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; if( p_var->i_usage > 1 ) { p_var->i_usage--; - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } @@ -292,8 +352,10 @@ int __var_Destroy( vlc_object_t *p_this, const char *psz_name ) for( i = 0 ; i < p_var->choices.i_count ; i++ ) { p_var->pf_free( &p_var->choices.p_values[i] ); + free( p_var->choices_text.p_values[i].psz_string ); } free( p_var->choices.p_values ); + free( p_var->choices_text.p_values ); } /* Free callbacks if needed */ @@ -303,48 +365,53 @@ int __var_Destroy( vlc_object_t *p_this, const char *psz_name ) } free( p_var->psz_name ); - if( p_var->psz_text ) free( p_var->psz_text ); + free( p_var->psz_text ); - memmove( p_this->p_vars + i_var, - p_this->p_vars + i_var + 1, - (p_this->i_vars - i_var - 1) * sizeof(variable_t) ); + memmove( p_priv->p_vars + i_var, + p_priv->p_vars + i_var + 1, + (p_priv->i_vars - i_var - 1) * sizeof(variable_t) ); - if( (p_this->i_vars & 15) == 0 ) + if( (p_priv->i_vars & 15) == 0 ) { - p_this->p_vars = realloc( p_this->p_vars, - (p_this->i_vars) * sizeof( variable_t ) ); + p_priv->p_vars = realloc( p_priv->p_vars, + (p_priv->i_vars) * sizeof( variable_t ) ); } - p_this->i_vars--; + p_priv->i_vars--; - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } -/***************************************************************************** - * var_Change: perform an action on a variable - ***************************************************************************** +/** + * Perform an action on a variable * - *****************************************************************************/ + * \param p_this The object that holds the variable + * \param psz_name The name of the variable + * \param i_action The action to perform. Must be one of \ref var_action + * \param p_val First action parameter + * \param p_val2 Second action parameter + */ int __var_Change( vlc_object_t *p_this, const char *psz_name, int i_action, vlc_value_t *p_val, vlc_value_t *p_val2 ) { int i_var, i; variable_t *p_var; vlc_value_t oldval; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); - i_var = Lookup( p_this->p_vars, p_this->i_vars, psz_name ); + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_ENOVAR; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; switch( i_action ) { @@ -358,6 +425,12 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, p_var->pf_dup( &p_var->min ); CheckValue( p_var, &p_var->val ); break; + case VLC_VAR_GETMIN: + if( p_var->i_type & VLC_VAR_HASMIN ) + { + *p_val = p_var->min; + } + break; case VLC_VAR_SETMAX: if( p_var->i_type & VLC_VAR_HASMAX ) { @@ -368,6 +441,12 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, p_var->pf_dup( &p_var->max ); CheckValue( p_var, &p_var->val ); break; + case VLC_VAR_GETMAX: + if( p_var->i_type & VLC_VAR_HASMAX ) + { + *p_val = p_var->max; + } + break; case VLC_VAR_SETSTEP: if( p_var->i_type & VLC_VAR_HASSTEP ) { @@ -378,6 +457,12 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, p_var->pf_dup( &p_var->step ); CheckValue( p_var, &p_var->val ); break; + case VLC_VAR_GETSTEP: + if( p_var->i_type & VLC_VAR_HASSTEP ) + { + *p_val = p_var->step; + } + break; case VLC_VAR_ADDCHOICE: /* FIXME: the list is sorted, dude. Use something cleverer. */ for( i = p_var->choices.i_count ; i-- ; ) @@ -399,7 +484,7 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, INSERT_ELEM( p_var->choices.p_values, p_var->choices.i_count, i, *p_val ); INSERT_ELEM( p_var->choices_text.p_values, - p_var->choices_text.i_count, i, (vlc_value_t)0 ); + p_var->choices_text.i_count, i, *p_val ); p_var->pf_dup( &p_var->choices.p_values[i] ); p_var->choices_text.p_values[i].psz_string = ( p_val2 && p_val2->psz_string ) ? @@ -420,7 +505,7 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, if( i == p_var->choices.i_count ) { /* Not found */ - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_EGENERIC; } @@ -434,8 +519,7 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, } p_var->pf_free( &p_var->choices.p_values[i] ); - if( p_var->choices_text.p_values[i].psz_string ) - free( p_var->choices_text.p_values[i].psz_string ); + free( p_var->choices_text.p_values[i].psz_string ); REMOVE_ELEM( p_var->choices.p_values, p_var->choices.i_count, i ); REMOVE_ELEM( p_var->choices_text.p_values, p_var->choices_text.i_count, i ); @@ -450,11 +534,16 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, { p_var->pf_free( &p_var->choices.p_values[i] ); } - if( p_var->choices.i_count ) - free( p_var->choices.p_values ); + for( i = 0 ; i < p_var->choices_text.i_count ; i++ ) + free( p_var->choices_text.p_values[i].psz_string ); + + if( p_var->choices.i_count ) free( p_var->choices.p_values ); + if( p_var->choices_text.i_count ) free( p_var->choices_text.p_values ); p_var->choices.i_count = 0; p_var->choices.p_values = NULL; + p_var->choices_text.i_count = 0; + p_var->choices_text.p_values = NULL; p_var->i_default = -1; break; case VLC_VAR_SETDEFAULT: @@ -524,9 +613,20 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, break; case VLC_VAR_FREELIST: FreeList( p_val ); + if( p_val2 && p_val2->p_list ) + { + for( i = 0; i < p_val2->p_list->i_count; i++ ) + free( p_val2->p_list->p_values[i].psz_string ); + if( p_val2->p_list->i_count ) + { + free( p_val2->p_list->p_values ); + free( p_val2->p_list->pi_types ); + } + free( p_val2->p_list ); + } break; case VLC_VAR_SETTEXT: - if( p_var->psz_text ) free( p_var->psz_text ); + free( p_var->psz_text ); if( p_val && p_val->psz_string ) p_var->psz_text = strdup( p_val->psz_string ); break; @@ -537,64 +637,132 @@ int __var_Change( vlc_object_t *p_this, const char *psz_name, p_val->psz_string = strdup( p_var->psz_text ); } break; + case VLC_VAR_INHERITVALUE: + { + vlc_value_t val; + + if( InheritValue( p_this, + p_val2 ? p_val2->psz_string : psz_name, + &val, p_var->i_type ) + == VLC_SUCCESS ) + { + /* Duplicate already done */ + + /* Backup needed stuff */ + oldval = p_var->val; + /* Check boundaries and list */ + CheckValue( p_var, &val ); + /* Set the variable */ + p_var->val = val; + /* Free data if needed */ + p_var->pf_free( &oldval ); + } + + if( p_val ) + { + *p_val = p_var->val; + p_var->pf_dup( p_val ); + } + } + break; + case VLC_VAR_TRIGGER_CALLBACKS: + { + /* Deal with callbacks. Tell we're in a callback, release the lock, + * call stored functions, retake the lock. */ + if( p_var->i_entries ) + { + int i_var; + int i_entries = p_var->i_entries; + callback_entry_t *p_entries = p_var->p_entries; + + p_var->b_incallback = VLC_TRUE; + vlc_mutex_unlock( &p_priv->var_lock ); + + /* The real calls */ + for( ; i_entries-- ; ) + { + p_entries[i_entries].pf_callback( p_this, psz_name, p_var->val, p_var->val, + p_entries[i_entries].p_data ); + } + + vlc_mutex_lock( &p_priv->var_lock ); + + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); + if( i_var < 0 ) + { + msg_Err( p_this, "variable %s has disappeared", psz_name ); + vlc_mutex_unlock( &p_priv->var_lock ); + return VLC_ENOVAR; + } + + p_var = &p_priv->p_vars[i_var]; + p_var->b_incallback = VLC_FALSE; + } + } + break; default: break; } - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } -/***************************************************************************** - * var_Type: request a variable's type - ***************************************************************************** - * This function returns the variable type if it exists, or 0 if the +/** + * Request a variable's type + * + * \return The variable type if it exists, or 0 if the * variable could not be found. - *****************************************************************************/ + * \see \ref var_type + */ int __var_Type( vlc_object_t *p_this, const char *psz_name ) { int i_var, i_type; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); - i_var = Lookup( p_this->p_vars, p_this->i_vars, psz_name ); + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return 0; } - i_type = p_this->p_vars[i_var].i_type; + i_type = p_priv->p_vars[i_var].i_type; - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return i_type; } -/***************************************************************************** - * var_Set: set a variable's value - ***************************************************************************** +/** + * Set a variable's value * - *****************************************************************************/ + * \param p_this The object that hold the variable + * \param psz_name The name of the variable + * \param val the value to set + */ int __var_Set( vlc_object_t *p_this, const char *psz_name, vlc_value_t val ) { int i_var; variable_t *p_var; vlc_value_t oldval; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); i_var = GetUnused( p_this, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return i_var; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; /* Duplicate data if needed */ p_var->pf_dup( &val ); @@ -617,7 +785,7 @@ int __var_Set( vlc_object_t *p_this, const char *psz_name, vlc_value_t val ) callback_entry_t *p_entries = p_var->p_entries; p_var->b_incallback = VLC_TRUE; - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); /* The real calls */ for( ; i_entries-- ; ) @@ -626,49 +794,53 @@ int __var_Set( vlc_object_t *p_this, const char *psz_name, vlc_value_t val ) p_entries[i_entries].p_data ); } - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); - i_var = Lookup( p_this->p_vars, p_this->i_vars, psz_name ); + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); if( i_var < 0 ) { msg_Err( p_this, "variable %s has disappeared", psz_name ); - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_ENOVAR; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; p_var->b_incallback = VLC_FALSE; } /* Free data if needed */ p_var->pf_free( &oldval ); - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } -/***************************************************************************** - * var_Get: get a variable's value - ***************************************************************************** +/** + * Get a variable's value * - *****************************************************************************/ + * \param p_this The object that holds the variable + * \param psz_name The name of the variable + * \param p_val Pointer to a vlc_value_t that will hold the variable's value + * after the function is finished + */ int __var_Get( vlc_object_t *p_this, const char *psz_name, vlc_value_t *p_val ) { int i_var; variable_t *p_var; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); - i_var = Lookup( p_this->p_vars, p_this->i_vars, psz_name ); + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_ENOVAR; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; /* Really get the variable */ *p_val = p_var->val; @@ -676,71 +848,101 @@ int __var_Get( vlc_object_t *p_this, const char *psz_name, vlc_value_t *p_val ) /* Duplicate value if needed */ p_var->pf_dup( p_val ); - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } -/***************************************************************************** - * var_AddCallback: register a callback in a variable - ***************************************************************************** - * We store a function pointer pf_callback that will be called upon variable - * modification. p_data is a generic pointer that will be passed as additional - * argument to the callback function. - *****************************************************************************/ + +/** + * Finds a process-wide mutex, creates it if needed, and locks it. + * Unlock with vlc_mutex_unlock(). + */ +vlc_mutex_t *var_AcquireMutex( const char *name ) +{ + libvlc_global_data_t *p_global = vlc_global(); + vlc_value_t val; + + if( var_Create( p_global, name, VLC_VAR_MUTEX ) ) + return NULL; + + var_Get( p_global, name, &val ); + vlc_mutex_lock( val.p_address ); + return val.p_address; +} + + +/** + * Register a callback in a variable + * + * We store a function pointer that will be called upon variable + * modification. + * + * \param p_this The object that holds the variable + * \param psz_name The name of the variable + * \param pf_callback The function pointer + * \param p_data A generic pointer that will be passed as the last + * argument to the callback function. + * + * \warning The callback function is run in the thread that calls var_Set on + * the variable. Use proper locking. This thread may not have much + * time to spare, so keep callback functions short. + */ int __var_AddCallback( vlc_object_t *p_this, const char *psz_name, vlc_callback_t pf_callback, void *p_data ) { int i_var; variable_t *p_var; callback_entry_t entry; + vlc_object_internals_t *p_priv = p_this->p_internals; entry.pf_callback = pf_callback; entry.p_data = p_data; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); i_var = GetUnused( p_this, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return i_var; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; INSERT_ELEM( p_var->p_entries, p_var->i_entries, p_var->i_entries, entry ); - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } -/***************************************************************************** - * var_DelCallback: remove a callback from a variable - ***************************************************************************** +/** + * Remove a callback from a variable + * * pf_callback and p_data have to be given again, because different objects * might have registered the same callback function. - *****************************************************************************/ + */ int __var_DelCallback( vlc_object_t *p_this, const char *psz_name, vlc_callback_t pf_callback, void *p_data ) { int i_entry, i_var; variable_t *p_var; + vlc_object_internals_t *p_priv = p_this->p_internals; - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); i_var = GetUnused( p_this, psz_name ); if( i_var < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return i_var; } - p_var = &p_this->p_vars[i_var]; + p_var = &p_priv->p_vars[i_var]; for( i_entry = p_var->i_entries ; i_entry-- ; ) { @@ -753,17 +955,240 @@ int __var_DelCallback( vlc_object_t *p_this, const char *psz_name, if( i_entry < 0 ) { - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_EGENERIC; } REMOVE_ELEM( p_var->p_entries, p_var->i_entries, i_entry ); - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); + + return VLC_SUCCESS; +} + +/** + * Trigger callback on a variable + * + * \param p_this The object that hold the variable + * \param psz_name The name of the variable + */ +int __var_TriggerCallback( vlc_object_t *p_this, const char *psz_name ) +{ + int i_var; + variable_t *p_var; + vlc_value_t oldval; + vlc_object_internals_t *p_priv = p_this->p_internals; + + vlc_mutex_lock( &p_priv->var_lock ); + + i_var = GetUnused( p_this, psz_name ); + if( i_var < 0 ) + { + vlc_mutex_unlock( &p_priv->var_lock ); + return i_var; + } + + p_var = &p_priv->p_vars[i_var]; + + /* Backup needed stuff */ + oldval = p_var->val; + + /* Deal with callbacks. Tell we're in a callback, release the lock, + * call stored functions, retake the lock. */ + if( p_var->i_entries ) + { + int i_var; + int i_entries = p_var->i_entries; + callback_entry_t *p_entries = p_var->p_entries; + + p_var->b_incallback = VLC_TRUE; + vlc_mutex_unlock( &p_priv->var_lock ); + + /* The real calls */ + for( ; i_entries-- ; ) + { + p_entries[i_entries].pf_callback( p_this, psz_name, oldval, oldval, + p_entries[i_entries].p_data ); + } + + vlc_mutex_lock( &p_priv->var_lock ); + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); + if( i_var < 0 ) + { + msg_Err( p_this, "variable %s has disappeared", psz_name ); + vlc_mutex_unlock( &p_priv->var_lock ); + return VLC_ENOVAR; + } + + p_var = &p_priv->p_vars[i_var]; + p_var->b_incallback = VLC_FALSE; + } + + vlc_mutex_unlock( &p_priv->var_lock ); return VLC_SUCCESS; } +/** Parse a stringified option + * This function parse a string option and create the associated object + * variable + * The option must be of the form "[no[-]]foo[=bar]" where foo is the + * option name and bar is the value of the option. + * \param p_obj the object in which the variable must be created + * \param psz_option the option to parse + * \param trusted whether the option is set by a trusted input or not + * \return nothing + */ +void var_OptionParse( vlc_object_t *p_obj, const char *psz_option, + bool trusted ) +{ + char *psz_name, *psz_value; + int i_type; + vlc_bool_t b_isno = VLC_FALSE; + vlc_value_t val; + + val.psz_string = NULL; + + /* It's too much of a hassle to remove the ':' when we parse + * the cmd line :) */ + if( psz_option[0] == ':' ) + psz_option++; + + if( !psz_option[0] ) + return; + + psz_name = strdup( psz_option ); + if( psz_name == NULL ) + return; + + psz_value = strchr( psz_name, '=' ); + if( psz_value != NULL ) + *psz_value++ = '\0'; + + /* FIXME: :programs should be handled generically */ + if( !strcmp( psz_name, "programs" ) ) + i_type = VLC_VAR_LIST; + else + i_type = config_GetType( p_obj, psz_name ); + + if( !i_type && !psz_value ) + { + /* check for "no-foo" or "nofoo" */ + if( !strncmp( psz_name, "no-", 3 ) ) + { + memmove( psz_name, psz_name + 3, strlen(psz_name) + 1 - 3 ); + } + else if( !strncmp( psz_name, "no", 2 ) ) + { + memmove( psz_name, psz_name + 2, strlen(psz_name) + 1 - 2 ); + } + else goto cleanup; /* Option doesn't exist */ + + b_isno = VLC_TRUE; + i_type = config_GetType( p_obj, psz_name ); + } + if( !i_type ) goto cleanup; /* Option doesn't exist */ + + if( ( i_type != VLC_VAR_BOOL ) && + ( !psz_value || !*psz_value ) ) goto cleanup; /* Invalid value */ + + /* check if option is unsafe */ + if( !trusted ) + { + module_config_t *p_config = config_FindConfig( p_obj, psz_name ); + if( !p_config->b_safe ) + { + int policy = config_GetInt( p_obj, "security-policy" ); + switch( policy ) + { + case 0: /* block */ + msg_Err( p_obj, "option %s is unsafe and is blocked by security policy", psz_name ); + return; + case 1: /* allow */ + break; + case 2: /* prompt */ + { + char description[256]; + snprintf(description, sizeof(description), _("playlist item is making use of the following unsafe option '%s', which may be harmful if used in a malicious way, authorize it ?"), psz_name); + if( DIALOG_OK_YES != intf_UserYesNo( p_obj, _("WARNING: Unsafe Playlist"), description, _("Yes"), _("No"), NULL) ) + { + msg_Err( p_obj, "option %s is unsafe and is blocked by security policy", psz_name ); + goto cleanup; + } + } + default: + ; + } + } + } + + /* Create the variable in the input object. + * Children of the input object will be able to retreive this value + * thanks to the inheritance property of the object variables. */ + var_Create( p_obj, psz_name, i_type ); + + switch( i_type ) + { + case VLC_VAR_BOOL: + val.b_bool = !b_isno; + break; + + case VLC_VAR_INTEGER: + val.i_int = strtol( psz_value, NULL, 0 ); + break; + + case VLC_VAR_FLOAT: + val.f_float = atof( psz_value ); + break; + + case VLC_VAR_STRING: + case VLC_VAR_MODULE: + case VLC_VAR_FILE: + case VLC_VAR_DIRECTORY: + val.psz_string = psz_value; + break; + + case VLC_VAR_LIST: + { + char *psz_orig, *psz_var; + vlc_list_t *p_list = malloc(sizeof(vlc_list_t)); + val.p_list = p_list; + p_list->i_count = 0; + + psz_var = psz_orig = strdup(psz_value); + while( psz_var && *psz_var ) + { + char *psz_item = psz_var; + vlc_value_t val2; + while( *psz_var && *psz_var != ',' ) psz_var++; + if( *psz_var == ',' ) + { + *psz_var = '\0'; + psz_var++; + } + val2.i_int = strtol( psz_item, NULL, 0 ); + INSERT_ELEM( p_list->p_values, p_list->i_count, + p_list->i_count, val2 ); + /* p_list->i_count is incremented twice by INSERT_ELEM */ + p_list->i_count--; + INSERT_ELEM( p_list->pi_types, p_list->i_count, + p_list->i_count, VLC_VAR_INTEGER ); + } + free( psz_orig ); + break; + } + + default: + goto cleanup; + } + + var_Set( p_obj, psz_name, val ); + +cleanup: + free( psz_name ); +} + + /* Following functions are local */ /***************************************************************************** @@ -775,16 +1200,17 @@ int __var_DelCallback( vlc_object_t *p_this, const char *psz_name, static int GetUnused( vlc_object_t *p_this, const char *psz_name ) { int i_var, i_tries = 0; + vlc_object_internals_t *p_priv = p_this->p_internals; while( VLC_TRUE ) { - i_var = Lookup( p_this->p_vars, p_this->i_vars, psz_name ); + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); if( i_var < 0 ) { return VLC_ENOVAR; } - if( ! p_this->p_vars[i_var].b_incallback ) + if( ! p_priv->p_vars[i_var].b_incallback ) { return i_var; } @@ -795,9 +1221,9 @@ static int GetUnused( vlc_object_t *p_this, const char *psz_name ) return VLC_ETIMEOUT; } - vlc_mutex_unlock( &p_this->var_lock ); + vlc_mutex_unlock( &p_priv->var_lock ); msleep( THREAD_SLEEP ); - vlc_mutex_lock( &p_this->var_lock ); + vlc_mutex_lock( &p_priv->var_lock ); } } @@ -968,7 +1394,7 @@ static int LookupInner( variable_t *p_vars, int i_count, uint32_t i_hash ) * This function checks p_val's value against p_var's limitations such as * minimal and maximal value, step, in-list position, and modifies p_val if * necessary. - *****************************************************************************/ + ****************************************************************************/ static void CheckValue ( variable_t *p_var, vlc_value_t *p_val ) { /* Check that our variable is in the list */ @@ -1043,3 +1469,161 @@ static void CheckValue ( variable_t *p_var, vlc_value_t *p_val ) break; } } + +/***************************************************************************** + * InheritValue: try to inherit the value of this variable from the same one + * in our closest parent. + *****************************************************************************/ +static int InheritValue( vlc_object_t *p_this, const char *psz_name, + vlc_value_t *p_val, int i_type ) +{ + int i_var; + variable_t *p_var; + + /* No need to take the structure lock, + * we are only looking for our parents */ + + if( !p_this->p_parent ) + { + switch( i_type & VLC_VAR_TYPE ) + { + case VLC_VAR_FILE: + case VLC_VAR_DIRECTORY: + case VLC_VAR_STRING: + case VLC_VAR_MODULE: + p_val->psz_string = config_GetPsz( p_this, psz_name ); + if( !p_val->psz_string ) p_val->psz_string = strdup(""); + break; + case VLC_VAR_FLOAT: + p_val->f_float = config_GetFloat( p_this, psz_name ); + break; + case VLC_VAR_INTEGER: + case VLC_VAR_HOTKEY: + p_val->i_int = config_GetInt( p_this, psz_name ); + break; + case VLC_VAR_BOOL: + p_val->b_bool = config_GetInt( p_this, psz_name ); + break; + case VLC_VAR_LIST: + { + char *psz_orig, *psz_var; + vlc_list_t *p_list = malloc(sizeof(vlc_list_t)); + p_val->p_list = p_list; + p_list->i_count = 0; + + psz_var = psz_orig = config_GetPsz( p_this, psz_name ); + while( psz_var && *psz_var ) + { + char *psz_item = psz_var; + vlc_value_t val; + while( *psz_var && *psz_var != ',' ) psz_var++; + if( *psz_var == ',' ) + { + *psz_var = '\0'; + psz_var++; + } + val.i_int = strtol( psz_item, NULL, 0 ); + INSERT_ELEM( p_list->p_values, p_list->i_count, + p_list->i_count, val ); + /* p_list->i_count is incremented twice by INSERT_ELEM */ + p_list->i_count--; + INSERT_ELEM( p_list->pi_types, p_list->i_count, + p_list->i_count, VLC_VAR_INTEGER ); + } + free( psz_orig ); + break; + } + default: + return VLC_ENOOBJ; + break; + } + + return VLC_SUCCESS; + } + + vlc_object_internals_t *p_priv = p_this->p_parent->p_internals; + + /* Look for the variable */ + vlc_mutex_lock( &p_priv->var_lock ); + + i_var = Lookup( p_priv->p_vars, p_priv->i_vars, psz_name ); + + if( i_var >= 0 ) + { + /* We found it! */ + p_var = &p_priv->p_vars[i_var]; + + /* Really get the variable */ + *p_val = p_var->val; + + /* Duplicate value if needed */ + p_var->pf_dup( p_val ); + + vlc_mutex_unlock( &p_priv->var_lock ); + return VLC_SUCCESS; + } + + vlc_mutex_unlock( &p_priv->var_lock ); + + /* We're still not there */ + + return InheritValue( p_this->p_parent, psz_name, p_val, i_type ); +} + +/********************************************************************** + * Execute a var command on an object identified by its name + **********************************************************************/ +int __var_Command( vlc_object_t *p_this, const char *psz_name, + const char *psz_cmd, const char *psz_arg, char **psz_msg ) +{ + vlc_object_t *p_obj = vlc_object_find_name( p_this->p_libvlc, + psz_name, FIND_CHILD ); + int i_type, i_ret; + + if( !p_obj ) + { + if( psz_msg ) + *psz_msg = strdup( "Unknown destination object." ); + return VLC_ENOOBJ; + } + + i_type = var_Type( p_obj, psz_cmd ); + if( !( i_type&VLC_VAR_ISCOMMAND ) ) + { + vlc_object_release( p_obj ); + if( psz_msg ) + *psz_msg = strdup( "Variable doesn't exist or isn't a command." ); + return VLC_EGENERIC; + } + + i_type &= 0xf0; + switch( i_type ) + { + case VLC_VAR_INTEGER: + i_ret = var_SetInteger( p_obj, psz_cmd, atoi( psz_arg ) ); + break; + case VLC_VAR_FLOAT: + i_ret = var_SetFloat( p_obj, psz_cmd, atof( psz_arg ) ); + break; + case VLC_VAR_STRING: + i_ret = var_SetString( p_obj, psz_cmd, psz_arg ); + break; + case VLC_VAR_BOOL: + i_ret = var_SetBool( p_obj, psz_cmd, atoi( psz_arg ) ); + break; + default: + i_ret = VLC_EGENERIC; + break; + } + + vlc_object_release( p_obj ); + + if( psz_msg ) + { + *psz_msg = (char*)malloc( 80 ); + sprintf( *psz_msg, "%s on object %s returned %i (%s)", + psz_cmd, psz_name, i_ret, vlc_error( i_ret ) ); + } + + return i_ret; +}