151 lines
4.3 KiB
C
151 lines
4.3 KiB
C
/*****************************************************************************
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* filters.c: common filter functions
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*****************************************************************************
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* Copyright (C) 2010-2025 x264 project
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*
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* Authors: Diogo Franco <diogomfranco@gmail.com>
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* Steven Walters <kemuri9@gmail.com>
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* Henrik Gramner <henrik@gramner.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at licensing@x264.com.
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*****************************************************************************/
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#include "filters.h"
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#define RETURN_IF_ERROR( cond, ... ) RETURN_IF_ERR( cond, "options", NULL, __VA_ARGS__ )
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char **x264_split_options( const char *opt_str, const char * const *options )
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{
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int opt_count = 0, options_count = 0, found_named = 0;
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size_t size = 0;
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const char *opt = opt_str;
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if( !opt_str )
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return NULL;
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while( options[options_count] )
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options_count++;
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do
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{
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size_t length = strcspn( opt, "=," );
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if( opt[length] == '=' )
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{
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const char * const *option = options;
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while( *option && (strlen( *option ) != length || strncmp( opt, *option, length )) )
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option++;
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RETURN_IF_ERROR( !*option, "Invalid option '%.*s'\n", length, opt );
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found_named = 1;
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length += strcspn( opt + length, "," );
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}
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else
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{
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RETURN_IF_ERROR( opt_count >= options_count, "Too many options given\n" );
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RETURN_IF_ERROR( found_named, "Ordered option given after named\n" );
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size += strlen( options[opt_count] ) + 1;
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}
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opt_count++;
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opt += length;
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} while( *opt++ );
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size_t offset = 2 * (opt_count+1) * sizeof(char*);
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size += offset + (opt - opt_str);
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char **opts = calloc( 1, size );
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RETURN_IF_ERROR( !opts, "malloc failed\n" );
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#define insert_opt( src, length )\
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do {\
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opts[i++] = memcpy( (char*)opts + offset, src, length );\
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offset += length + 1;\
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src += length + 1;\
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} while( 0 )
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for( int i = 0; i < 2*opt_count; )
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{
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size_t length = strcspn( opt_str, "=," );
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if( opt_str[length] == '=' )
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{
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insert_opt( opt_str, length );
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length = strcspn( opt_str, "," );
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}
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else
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{
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const char *option = options[i/2];
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size_t option_length = strlen( option );
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insert_opt( option, option_length );
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}
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insert_opt( opt_str, length );
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}
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assert( offset == size );
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return opts;
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}
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char *x264_get_option( const char *name, char **split_options )
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{
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if( split_options )
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{
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int last_i = -1;
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for( int i = 0; split_options[i]; i += 2 )
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if( !strcmp( split_options[i], name ) )
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last_i = i;
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if( last_i >= 0 && split_options[last_i+1][0] )
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return split_options[last_i+1];
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}
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return NULL;
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}
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int x264_otob( const char *str, int def )
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{
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if( str )
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return !strcasecmp( str, "true" ) || !strcmp( str, "1" ) || !strcasecmp( str, "yes" );
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return def;
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}
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double x264_otof( const char *str, double def )
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{
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double ret = def;
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if( str )
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{
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char *end;
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ret = strtod( str, &end );
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if( end == str || *end != '\0' )
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ret = def;
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}
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return ret;
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}
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int x264_otoi( const char *str, int def )
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{
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int ret = def;
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if( str )
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{
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char *end;
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ret = strtol( str, &end, 0 );
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if( end == str || *end != '\0' )
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ret = def;
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}
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return ret;
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}
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char *x264_otos( char *str, char *def )
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{
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return str ? str : def;
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}
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