X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_properties.c;h=bb49c857b42c91804051996ff0e3de2c8bd44499;hb=bf3264b9e340ba5c11cbf59835a8af3db94e0cc2;hp=1638200c0a85bce147359fd649206f64452147c7;hpb=5b59ce704d4f317e845afa30c5ade12c0fd22d43;p=melted diff --git a/src/framework/mlt_properties.c b/src/framework/mlt_properties.c index 1638200..bb49c85 100644 --- a/src/framework/mlt_properties.c +++ b/src/framework/mlt_properties.c @@ -3,19 +3,19 @@ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Charles Yates * - * 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 library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. * - * This program is distributed in the hope that it will be useful, + * This library 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. + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" @@ -25,6 +25,10 @@ #include #include #include +#include + +#include +#include /* ---------------- // Private Implementation // ---------------- */ @@ -39,24 +43,47 @@ typedef struct int count; int size; mlt_properties mirror; + int ref_count; } property_list; +/** Memory leak checks. +*/ + +//#define _MLT_PROPERTY_CHECKS_ 2 + +#ifdef _MLT_PROPERTY_CHECKS_ +static int properties_created = 0; +static int properties_destroyed = 0; +#endif + /** Basic implementation. */ int mlt_properties_init( mlt_properties this, void *child ) { - // NULL all methods - memset( this, 0, sizeof( struct mlt_properties_s ) ); + if ( this != NULL ) + { +#ifdef _MLT_PROPERTY_CHECKS_ + // Increment number of properties created + properties_created ++; +#endif + + // NULL all methods + memset( this, 0, sizeof( struct mlt_properties_s ) ); - // Assign the child of the object - this->child = child; + // Assign the child of the object + this->child = child; - // Allocate the private structure - this->private = calloc( sizeof( property_list ), 1 ); + // Allocate the local structure + this->local = calloc( sizeof( property_list ), 1 ); - return this->private == NULL; + // Increment the ref count + ( ( property_list * )this->local )->ref_count = 1; + } + + // Check that initialisation was successful + return this != NULL && this->local == NULL; } /** Constructor for stand alone object. @@ -74,7 +101,60 @@ mlt_properties mlt_properties_new( ) return this; } -static inline int generate_hash( char *name ) +/** Load properties from a file. +*/ + +mlt_properties mlt_properties_load( const char *filename ) +{ + // Construct a standalone properties object + mlt_properties this = mlt_properties_new( ); + + if ( this != NULL ) + { + // Open the file + FILE *file = fopen( filename, "r" ); + + // Load contents of file + if ( file != NULL ) + { + // Temp string + char temp[ 1024 ]; + char last[ 1024 ] = ""; + + // Read each string from the file + while( fgets( temp, 1024, file ) ) + { + // Chomp the string + temp[ strlen( temp ) - 1 ] = '\0'; + + // Check if the line starts with a . + if ( temp[ 0 ] == '.' ) + { + char temp2[ 1024 ]; + sprintf( temp2, "%s%s", last, temp ); + strcpy( temp, temp2 ); + } + else if ( strchr( temp, '=' ) ) + { + strcpy( last, temp ); + *( strchr( last, '=' ) ) = '\0'; + } + + // Parse and set the property + if ( strcmp( temp, "" ) && temp[ 0 ] != '#' ) + mlt_properties_parse( this, temp ); + } + + // Close the file + fclose( file ); + } + } + + // Return the pointer + return this; +} + +static inline int generate_hash( const char *name ) { int hash = 0; int i = 1; @@ -88,9 +168,9 @@ static inline int generate_hash( char *name ) real producer. */ -static inline void mlt_properties_do_mirror( mlt_properties this, char *name ) +static inline void mlt_properties_do_mirror( mlt_properties this, const char *name ) { - property_list *list = this->private; + property_list *list = this->local; if ( list->mirror != NULL ) { char *value = mlt_properties_get( this, name ); @@ -99,12 +179,51 @@ static inline void mlt_properties_do_mirror( mlt_properties this, char *name ) } } -/** Allow the specification of a mirror. +/** Maintain ref count to allow multiple uses of an mlt object. +*/ + +int mlt_properties_inc_ref( mlt_properties this ) +{ + if ( this != NULL ) + { + property_list *list = this->local; + return ++ list->ref_count; + } + return 0; +} + +/** Maintain ref count to allow multiple uses of an mlt object. +*/ + +int mlt_properties_dec_ref( mlt_properties this ) +{ + if ( this != NULL ) + { + property_list *list = this->local; + return -- list->ref_count; + } + return 0; +} + +/** Return the ref count of this object. +*/ + +int mlt_properties_ref_count( mlt_properties this ) +{ + if ( this != NULL ) + { + property_list *list = this->local; + return list->ref_count; + } + return 0; +} + +/** Mirror properties set on 'this' to 'that'. */ void mlt_properties_mirror( mlt_properties this, mlt_properties that ) { - property_list *list = this->private; + property_list *list = this->local; list->mirror = that; } @@ -130,7 +249,7 @@ int mlt_properties_inherit( mlt_properties this, mlt_properties that ) /** Pass all properties from 'that' that match the prefix to 'this' (excluding the prefix). */ -int mlt_properties_pass( mlt_properties this, mlt_properties that, char *prefix ) +int mlt_properties_pass( mlt_properties this, mlt_properties that, const char *prefix ) { int count = mlt_properties_count( that ); int length = strlen( prefix ); @@ -151,9 +270,9 @@ int mlt_properties_pass( mlt_properties this, mlt_properties that, char *prefix /** Locate a property by name */ -static inline mlt_property mlt_properties_find( mlt_properties this, char *name ) +static inline mlt_property mlt_properties_find( mlt_properties this, const char *name ) { - property_list *list = this->private; + property_list *list = this->local; mlt_property value = NULL; int key = generate_hash( name ); int i = list->hash[ key ] - 1; @@ -178,16 +297,16 @@ static inline mlt_property mlt_properties_find( mlt_properties this, char *name /** Add a new property. */ -static mlt_property mlt_properties_add( mlt_properties this, char *name ) +static mlt_property mlt_properties_add( mlt_properties this, const char *name ) { - property_list *list = this->private; + property_list *list = this->local; int key = generate_hash( name ); // Check that we have space and resize if necessary if ( list->count == list->size ) { list->size += 50; - list->name = realloc( list->name, list->size * sizeof( char * ) ); + list->name = realloc( list->name, list->size * sizeof( const char * ) ); list->value = realloc( list->value, list->size * sizeof( mlt_property ) ); } @@ -206,7 +325,7 @@ static mlt_property mlt_properties_add( mlt_properties this, char *name ) /** Fetch a property by name - this includes add if not found. */ -static mlt_property mlt_properties_fetch( mlt_properties this, char *name ) +static mlt_property mlt_properties_fetch( mlt_properties this, const char *name ) { // Try to find an existing property first mlt_property property = mlt_properties_find( this, name ); @@ -219,10 +338,56 @@ static mlt_property mlt_properties_fetch( mlt_properties this, char *name ) return property; } +/** Pass property 'name' from 'that' to 'this' +* Who to blame: Zach +*/ + +void mlt_properties_pass_property( mlt_properties this, mlt_properties that, const char *name ) +{ + // Make sure the source property isn't null. + mlt_property that_prop = mlt_properties_find( that, name ); + if( that_prop == NULL ) + return; + + mlt_property_pass( mlt_properties_fetch( this, name ), that_prop ); +} + +/** Pass all properties from 'that' to 'this' as found in comma seperated 'list'. +* Who to blame: Zach +*/ + +int mlt_properties_pass_list( mlt_properties this, mlt_properties that, const char *list ) +{ + char *props = strdup( list ); + char *ptr = props; + char *delim = " ,\t\n"; // Any combination of spaces, commas, tabs, and newlines + int count, done = 0; + + while( !done ) + { + count = strcspn( ptr, delim ); + + if( ptr[count] == '\0' ) + done = 1; + else + ptr[count] = '\0'; // Make it a real string + + mlt_properties_pass_property( this, that, ptr ); + + ptr += count + 1; + ptr += strspn( ptr, delim ); + } + + free( props ); + + return 0; +} + + /** Set the property. */ -int mlt_properties_set( mlt_properties this, char *name, char *value ) +int mlt_properties_set( mlt_properties this, const char *name, const char *value ) { int error = 1; @@ -230,11 +395,70 @@ int mlt_properties_set( mlt_properties this, char *name, char *value ) mlt_property property = mlt_properties_fetch( this, name ); // Set it if not NULL - if ( property != NULL ) + if ( property == NULL ) + { + fprintf( stderr, "Whoops - %s not found (should never occur)\n", name ); + } + else if ( value == NULL ) + { + error = mlt_property_set_string( property, value ); + mlt_properties_do_mirror( this, name ); + } + else if ( *value != '@' ) { error = mlt_property_set_string( property, value ); mlt_properties_do_mirror( this, name ); } + else if ( value[ 0 ] == '@' ) + { + int total = 0; + int current = 0; + char id[ 255 ]; + char op = '+'; + + value ++; + + while ( *value != '\0' ) + { + int length = strcspn( value, "+-*/" ); + + // Get the identifier + strncpy( id, value, length ); + id[ length ] = '\0'; + value += length; + + // Determine the value + if ( isdigit( id[ 0 ] ) ) + current = atof( id ); + else + current = mlt_properties_get_int( this, id ); + + // Apply the operation + switch( op ) + { + case '+': + total += current; + break; + case '-': + total -= current; + break; + case '*': + total *= current; + break; + case '/': + total /= current; + break; + } + + // Get the next op + op = *value != '\0' ? *value ++ : ' '; + } + + error = mlt_property_set_int( property, total ); + mlt_properties_do_mirror( this, name ); + } + + mlt_events_fire( this, "property-changed", name, NULL ); return error; } @@ -242,7 +466,7 @@ int mlt_properties_set( mlt_properties this, char *name, char *value ) /** Set or default the property. */ -int mlt_properties_set_or_default( mlt_properties this, char *name, char *value, char *def ) +int mlt_properties_set_or_default( mlt_properties this, const char *name, const char *value, const char *def ) { return mlt_properties_set( this, name, value == NULL ? def : value ); } @@ -250,7 +474,7 @@ int mlt_properties_set_or_default( mlt_properties this, char *name, char *value, /** Get a string value by name. */ -char *mlt_properties_get( mlt_properties this, char *name ) +char *mlt_properties_get( mlt_properties this, const char *name ) { mlt_property value = mlt_properties_find( this, name ); return value == NULL ? NULL : mlt_property_get_string( value ); @@ -261,7 +485,7 @@ char *mlt_properties_get( mlt_properties this, char *name ) char *mlt_properties_get_name( mlt_properties this, int index ) { - property_list *list = this->private; + property_list *list = this->local; if ( index >= 0 && index < list->count ) return list->name[ index ]; return NULL; @@ -272,7 +496,7 @@ char *mlt_properties_get_name( mlt_properties this, int index ) char *mlt_properties_get_value( mlt_properties this, int index ) { - property_list *list = this->private; + property_list *list = this->local; if ( index >= 0 && index < list->count ) return mlt_property_get_string( list->value[ index ] ); return NULL; @@ -283,7 +507,7 @@ char *mlt_properties_get_value( mlt_properties this, int index ) void *mlt_properties_get_data_at( mlt_properties this, int index, int *size ) { - property_list *list = this->private; + property_list *list = this->local; if ( index >= 0 && index < list->count ) return mlt_property_get_data( list->value[ index ], size ); return NULL; @@ -294,34 +518,39 @@ void *mlt_properties_get_data_at( mlt_properties this, int index, int *size ) int mlt_properties_count( mlt_properties this ) { - property_list *list = this->private; + property_list *list = this->local; return list->count; } /** Set a value by parsing a name=value string */ -int mlt_properties_parse( mlt_properties this, char *namevalue ) +int mlt_properties_parse( mlt_properties this, const char *namevalue ) { char *name = strdup( namevalue ); - char *value = strdup( namevalue ); + char *value = NULL; int error = 0; + char *ptr = strchr( name, '=' ); - if ( strchr( name, '=' ) ) + if ( ptr ) { - *( strchr( name, '=' ) ) = '\0'; - strcpy( value, strchr( value, '=' ) + 1 ); + *( ptr ++ ) = '\0'; + + if ( *ptr != '\"' ) + { + value = strdup( ptr ); + } + else + { + ptr ++; + value = strdup( ptr ); + if ( value != NULL && value[ strlen( value ) - 1 ] == '\"' ) + value[ strlen( value ) - 1 ] = '\0'; + } } else { - strcpy( value, "" ); - } - - if ( strlen( value ) > 1 && value[ 0 ] == '\"' ) - { - strcpy( value, value + 1 ); - if ( value[ strlen( value ) - 1 ] == '\"' ) - value[ strlen( value ) - 1 ] = '\0'; + value = strdup( "" ); } error = mlt_properties_set( this, name, value ); @@ -335,7 +564,7 @@ int mlt_properties_parse( mlt_properties this, char *namevalue ) /** Get a value associated to the name. */ -int mlt_properties_get_int( mlt_properties this, char *name ) +int mlt_properties_get_int( mlt_properties this, const char *name ) { mlt_property value = mlt_properties_find( this, name ); return value == NULL ? 0 : mlt_property_get_int( value ); @@ -344,7 +573,7 @@ int mlt_properties_get_int( mlt_properties this, char *name ) /** Set a value associated to the name. */ -int mlt_properties_set_int( mlt_properties this, char *name, int value ) +int mlt_properties_set_int( mlt_properties this, const char *name, int value ) { int error = 1; @@ -358,13 +587,46 @@ int mlt_properties_set_int( mlt_properties this, char *name, int value ) mlt_properties_do_mirror( this, name ); } + mlt_events_fire( this, "property-changed", name, NULL ); + return error; } /** Get a value associated to the name. */ -double mlt_properties_get_double( mlt_properties this, char *name ) +int64_t mlt_properties_get_int64( mlt_properties this, const char *name ) +{ + mlt_property value = mlt_properties_find( this, name ); + return value == NULL ? 0 : mlt_property_get_int64( value ); +} + +/** Set a value associated to the name. +*/ + +int mlt_properties_set_int64( mlt_properties this, const char *name, int64_t value ) +{ + int error = 1; + + // Fetch the property to work with + mlt_property property = mlt_properties_fetch( this, name ); + + // Set it if not NULL + if ( property != NULL ) + { + error = mlt_property_set_int64( property, value ); + mlt_properties_do_mirror( this, name ); + } + + mlt_events_fire( this, "property-changed", name, NULL ); + + return error; +} + +/** Get a value associated to the name. +*/ + +double mlt_properties_get_double( mlt_properties this, const char *name ) { mlt_property value = mlt_properties_find( this, name ); return value == NULL ? 0 : mlt_property_get_double( value ); @@ -373,7 +635,7 @@ double mlt_properties_get_double( mlt_properties this, char *name ) /** Set a value associated to the name. */ -int mlt_properties_set_double( mlt_properties this, char *name, double value ) +int mlt_properties_set_double( mlt_properties this, const char *name, double value ) { int error = 1; @@ -387,13 +649,15 @@ int mlt_properties_set_double( mlt_properties this, char *name, double value ) mlt_properties_do_mirror( this, name ); } + mlt_events_fire( this, "property-changed", name, NULL ); + return error; } /** Get a value associated to the name. */ -mlt_position mlt_properties_get_position( mlt_properties this, char *name ) +mlt_position mlt_properties_get_position( mlt_properties this, const char *name ) { mlt_property value = mlt_properties_find( this, name ); return value == NULL ? 0 : mlt_property_get_position( value ); @@ -402,7 +666,7 @@ mlt_position mlt_properties_get_position( mlt_properties this, char *name ) /** Set a value associated to the name. */ -int mlt_properties_set_position( mlt_properties this, char *name, mlt_position value ) +int mlt_properties_set_position( mlt_properties this, const char *name, mlt_position value ) { int error = 1; @@ -416,13 +680,15 @@ int mlt_properties_set_position( mlt_properties this, char *name, mlt_position v mlt_properties_do_mirror( this, name ); } + mlt_events_fire( this, "property-changed", name, NULL ); + return error; } /** Get a value associated to the name. */ -void *mlt_properties_get_data( mlt_properties this, char *name, int *length ) +void *mlt_properties_get_data( mlt_properties this, const char *name, int *length ) { mlt_property value = mlt_properties_find( this, name ); return value == NULL ? NULL : mlt_property_get_data( value, length ); @@ -431,7 +697,7 @@ void *mlt_properties_get_data( mlt_properties this, char *name, int *length ) /** Set a value associated to the name. */ -int mlt_properties_set_data( mlt_properties this, char *name, void *value, int length, mlt_destructor destroy, mlt_serialiser serialise ) +int mlt_properties_set_data( mlt_properties this, const char *name, void *value, int length, mlt_destructor destroy, mlt_serialiser serialise ) { int error = 1; @@ -442,19 +708,21 @@ int mlt_properties_set_data( mlt_properties this, char *name, void *value, int l if ( property != NULL ) error = mlt_property_set_data( property, value, length, destroy, serialise ); + mlt_events_fire( this, "property-changed", name, NULL ); + return error; } /** Rename a property. */ -int mlt_properties_rename( mlt_properties this, char *source, char *dest ) +int mlt_properties_rename( mlt_properties this, const char *source, const char *dest ) { mlt_property value = mlt_properties_find( this, dest ); if ( value == NULL ) { - property_list *list = this->private; + property_list *list = this->local; int i = 0; // Locate the item @@ -478,34 +746,167 @@ int mlt_properties_rename( mlt_properties this, char *source, char *dest ) void mlt_properties_dump( mlt_properties this, FILE *output ) { - property_list *list = this->private; + property_list *list = this->local; int i = 0; for ( i = 0; i < list->count; i ++ ) - fprintf( stderr, "%s = %s\n", list->name[ i ], mlt_properties_get( this, list->name[ i ] ) ); + if ( mlt_properties_get( this, list->name[ i ] ) != NULL ) + fprintf( output, "%s=%s\n", list->name[ i ], mlt_properties_get( this, list->name[ i ] ) ); } -/** Close the list. +void mlt_properties_debug( mlt_properties this, const char *title, FILE *output ) +{ + if ( output == NULL ) output = stderr; + fprintf( output, "%s: ", title ); + if ( this != NULL ) + { + property_list *list = this->local; + int i = 0; + fprintf( output, "[ ref=%d", list->ref_count ); + for ( i = 0; i < list->count; i ++ ) + if ( mlt_properties_get( this, list->name[ i ] ) != NULL ) + fprintf( output, ", %s=%s", list->name[ i ], mlt_properties_get( this, list->name[ i ] ) ); + else + fprintf( output, ", %s=%p", list->name[ i ], mlt_properties_get_data( this, list->name[ i ], NULL ) ); + fprintf( output, " ]" ); + } + fprintf( output, "\n" ); +} + +int mlt_properties_save( mlt_properties this, const char *filename ) +{ + int error = 1; + FILE *f = fopen( filename, "w" ); + if ( f != NULL ) + { + mlt_properties_dump( this, f ); + fclose( f ); + error = 0; + } + return error; +} + +/* This is a very basic cross platform fnmatch replacement - it will fail in +** many cases, but for the basic *.XXX and YYY*.XXX, it will work ok. */ -void mlt_properties_close( mlt_properties this ) +static int mlt_fnmatch( const char *wild, const char *file ) +{ + int f = 0; + int w = 0; + + while( f < strlen( file ) && w < strlen( wild ) ) + { + if ( wild[ w ] == '*' ) + { + w ++; + if ( w == strlen( wild ) ) + f = strlen( file ); + while ( f != strlen( file ) && tolower( file[ f ] ) != tolower( wild[ w ] ) ) + f ++; + } + else if ( wild[ w ] == '?' || tolower( file[ f ] ) == tolower( wild[ w ] ) ) + { + f ++; + w ++; + } + else if ( wild[ 0 ] == '*' ) + { + w = 0; + } + else + { + return 0; + } + } + + return strlen( file ) == f && strlen( wild ) == w; +} + +static int mlt_compare( const void *this, const void *that ) +{ + return strcmp( mlt_property_get_string( *( mlt_property * )this ), mlt_property_get_string( *( mlt_property * )that ) ); +} + +/* Obtains an optionally sorted list of the files found in a directory with a specific wild card. + * Entries in the list have a numeric name (running from 0 to count - 1). Only values change + * position if sort is enabled. Designed to be posix compatible (linux, os/x, mingw etc). + */ + +int mlt_properties_dir_list( mlt_properties this, const char *dirname, const char *pattern, int sort ) { - property_list *list = this->private; - int index = 0; + DIR *dir = opendir( dirname ); - // Clean up names and values - for ( index = list->count - 1; index >= 0; index -- ) + if ( dir ) { - free( list->name[ index ] ); - mlt_property_close( list->value[ index ] ); + char key[ 20 ]; + struct dirent *de = readdir( dir ); + char fullname[ 1024 ]; + while( de != NULL ) + { + sprintf( key, "%d", mlt_properties_count( this ) ); + snprintf( fullname, 1024, "%s/%s", dirname, de->d_name ); + if ( de->d_name[ 0 ] != '.' && mlt_fnmatch( pattern, de->d_name ) ) + mlt_properties_set( this, key, fullname ); + de = readdir( dir ); + } + + closedir( dir ); + } + + if ( sort && mlt_properties_count( this ) ) + { + property_list *list = this->local; + qsort( list->value, mlt_properties_count( this ), sizeof( mlt_property ), mlt_compare ); } - // Clear up the list - free( list->name ); - free( list->value ); - free( list ); + return mlt_properties_count( this ); +} + +/** Close the list. +*/ + +void mlt_properties_close( mlt_properties this ) +{ + if ( this != NULL && mlt_properties_dec_ref( this ) <= 0 ) + { + if ( this->close != NULL ) + { + this->close( this->close_object ); + } + else + { + property_list *list = this->local; + int index = 0; + +#if _MLT_PROPERTY_CHECKS_ == 1 + // Show debug info + mlt_properties_debug( this, "Closing", stderr ); +#endif - // Free this now if this has no child - if ( this->child == NULL ) - free( this ); +#ifdef _MLT_PROPERTY_CHECKS_ + // Increment destroyed count + properties_destroyed ++; + + // Show current stats - these should match when the app is closed + fprintf( stderr, "Created %d, destroyed %d\n", properties_created, properties_destroyed ); +#endif + + // Clean up names and values + for ( index = list->count - 1; index >= 0; index -- ) + { + free( list->name[ index ] ); + mlt_property_close( list->value[ index ] ); + } + + // Clear up the list + free( list->name ); + free( list->value ); + free( list ); + + // Free this now if this has no child + if ( this->child == NULL ) + free( this ); + } + } }