m_property.c

   1
   2 /// \file
   3 /// \ingroup Properties
   4
   5 #include "config.h"
   6
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <inttypes.h>
  11 #include <unistd.h>
  12
  13 #include "m_option.h"
  14 #include "m_property.h"
  15 #include "mp_msg.h"
  16 #include "help_mp.h"
  17
  18 #define ROUND(x) ((int)((x)<0 ? (x)-0.5 : (x)+0.5))
  19
  20 static int do_action(m_option_t* prop_list, const char* name,
  21                      int action, void* arg, void *ctx) {
  22     const char* sep;
  23     m_option_t* prop;
  24     m_property_action_t ka;
  25     int r;
  26     if((sep = strchr(name,'/')) && sep[1]) {
  27         int len = sep-name;
  28         char base[len+1];
  29         memcpy(base,name,len);
  30         base[len] = 0;
  31         prop = m_option_list_find(prop_list, base);
  32         ka.key = sep+1;
  33         ka.action = action;
  34         ka.arg = arg;
  35         action = M_PROPERTY_KEY_ACTION;
  36         arg = &ka;
  37     } else
  38         prop = m_option_list_find(prop_list, name);
  39     if(!prop) return M_PROPERTY_UNKNOWN;
  40     r = ((m_property_ctrl_f)prop->p)(prop,action,arg,ctx);
  41     if(action == M_PROPERTY_GET_TYPE && r < 0) {
  42         if(!arg) return M_PROPERTY_ERROR;
  43         *(m_option_t**)arg = prop;
  44         return M_PROPERTY_OK;
  45     }
  46     return r;
  47 }
  48
  49 int m_property_do(m_option_t* prop_list, const char* name,
  50                   int action, void* arg, void *ctx) {
  51     m_option_t* opt;
  52     void* val;
  53     char* str;
  54     int r;
  55
  56     switch(action) {
  57     case M_PROPERTY_PRINT:
  58         if((r = do_action(prop_list,name,M_PROPERTY_PRINT,arg,ctx)) >= 0)
  59             return r;
  60         // fallback on the default print for this type
  61     case M_PROPERTY_TO_STRING:
  62         if((r = do_action(prop_list,name,M_PROPERTY_TO_STRING,arg,ctx)) !=
  63            M_PROPERTY_NOT_IMPLEMENTED)
  64             return r;
  65         // fallback on the options API. Get the type, value and print.
  66         if((r = do_action(prop_list,name,M_PROPERTY_GET_TYPE,&opt,ctx)) <= 0)
  67             return r;
  68         val = calloc(1,opt->type->size);
  69         if((r = do_action(prop_list,name,M_PROPERTY_GET,val,ctx)) <= 0) {
  70             free(val);
  71             return r;
  72         }
  73         if(!arg) return M_PROPERTY_ERROR;
  74         str = m_option_print(opt,val);
  75         free(val);
  76         *(char**)arg = str == (char*)-1 ? NULL : str;
  77         return str != (char*)-1;
  78     case M_PROPERTY_PARSE:
  79         // try the property own parsing func
  80         if((r = do_action(prop_list,name,M_PROPERTY_PARSE,arg,ctx)) !=
  81            M_PROPERTY_NOT_IMPLEMENTED)
  82             return r;
  83         // fallback on the options API, get the type and parse.
  84         if((r = do_action(prop_list,name,M_PROPERTY_GET_TYPE,&opt,ctx)) <= 0)
  85             return r;
  86         if(!arg) return M_PROPERTY_ERROR;
  87         val = calloc(1,opt->type->size);
  88         if((r = m_option_parse(opt,opt->name,arg,val,M_CONFIG_FILE)) <= 0) {
  89             free(val);
  90             return r;
  91         }
  92         r = do_action(prop_list,name,M_PROPERTY_SET,val,ctx);
  93         m_option_free(opt,val);
  94         free(val);
  95         return r;
  96     }
  97     return do_action(prop_list,name,action,arg,ctx);
  98 }
  99
 100 char* m_properties_expand_string(m_option_t* prop_list,char* str, void *ctx) {
 101     int l,fr=0,pos=0,size=strlen(str)+512;
 102     char *p = NULL,*e,*ret = malloc(size), num_val;
 103     int skip = 0, lvl = 0, skip_lvl = 0;
 104
 105     while(str[0]) {
 106         if(str[0] == '\\') {
 107             int sl = 1;
 108             switch(str[1]) {
 109             case 'e':
 110                 p = "\x1b", l = 1; break;
 111             case 'n':
 112                 p = "\n", l = 1; break;
 113             case 'r':
 114                 p = "\r", l = 1; break;
 115             case 't':
 116                 p = "\t", l = 1; break;
 117             case 'x':
 118                 if(str[2]) {
 119                     char num[3] = { str[2], str[3], 0 };
 120                     char* end = num;
 121                     num_val = strtol(num,&end,16);
 122                     sl = end-num;
 123                     l = 1;
 124                     p = &num_val;
 125                 } else
 126                     l = 0;
 127                 break;
 128             default:
 129                 p = str+1, l = 1;
 130             }
 131             str+=1+sl;
 132         } else if(lvl > 0 && str[0] == ')') {
 133             if(skip && lvl <= skip_lvl) skip = 0;
 134             lvl--, str++, l = 0;
 135         } else if(str[0] == '$' && str[1] == '{' && (e = strchr(str+2,'}'))) {
 136             int pl = e-str-2;
 137             char pname[pl+1];
 138             memcpy(pname,str+2,pl);
 139             pname[pl] = 0;
 140             if(m_property_do(prop_list, pname,
 141                              M_PROPERTY_PRINT, &p, ctx) >= 0 && p)
 142                 l = strlen(p), fr = 1;
 143             else
 144                 l = 0;
 145             str = e+1;
 146         } else if(str[0] == '?' && str[1] == '(' && (e = strchr(str+2,':'))) {
 147             int pl = e-str-2;
 148             char pname[pl+1];
 149             lvl++;
 150             if(!skip) {
 151                 memcpy(pname,str+2,pl);
 152                 pname[pl] = 0;
 153                 if(m_property_do(prop_list,pname,M_PROPERTY_GET,NULL,ctx) < 0)
 154                     skip = 1, skip_lvl = lvl;
 155             }
 156             str = e+1, l = 0;
 157         } else
 158             p = str, l = 1, str++;
 159
 160         if(skip || l <= 0) continue;
 161
 162         if(pos+l+1 > size) {
 163             size = pos+l+512;
 164             ret = realloc(ret,size);
 165         }
 166         memcpy(ret+pos,p,l);
 167         pos += l;
 168         if(fr) free(p), fr = 0;
 169     }
 170
 171     ret[pos] = 0;
 172     return ret;
 173 }
 174
 175 void m_properties_print_help_list(m_option_t* list) {
 176     char min[50],max[50];
 177     int i,count = 0;
 178
 179     mp_msg(MSGT_CFGPARSER, MSGL_INFO, MSGTR_PropertyListHeader);
 180     for(i = 0 ; list[i].name ; i++) {
 181         m_option_t* opt = &list[i];
 182         if(opt->flags & M_OPT_MIN)
 183             sprintf(min,"%-8.0f",opt->min);
 184         else
 185             strcpy(min,"No");
 186         if(opt->flags & M_OPT_MAX)
 187             sprintf(max,"%-8.0f",opt->max);
 188         else
 189             strcpy(max,"No");
 190         mp_msg(MSGT_CFGPARSER, MSGL_INFO, " %-20.20s %-15.15s %-10.10s %-10.10s\n",
 191                opt->name,
 192                opt->type->name,
 193                min,
 194                max);
 195         count++;
 196     }
 197     mp_msg(MSGT_CFGPARSER, MSGL_INFO, MSGTR_TotalProperties, count);
 198 }
 199
 200 // Some generic property implementations
 201
 202 int m_property_int_ro(m_option_t* prop,int action,
 203                       void* arg,int var) {
 204     switch(action) {
 205     case M_PROPERTY_GET:
 206         if(!arg) return 0;
 207         *(int*)arg = var;
 208         return 1;
 209     }
 210     return M_PROPERTY_NOT_IMPLEMENTED;
 211 }
 212
 213 int m_property_int_range(m_option_t* prop,int action,
 214                          void* arg,int* var) {
 215     switch(action) {
 216     case M_PROPERTY_SET:
 217         if(!arg) return 0;
 218         M_PROPERTY_CLAMP(prop,*(int*)arg);
 219         *var = *(int*)arg;
 220         return 1;
 221     case M_PROPERTY_STEP_UP:
 222     case M_PROPERTY_STEP_DOWN:
 223         *var += (arg ? *(int*)arg : 1) *
 224             (action == M_PROPERTY_STEP_DOWN ? -1 : 1);
 225         M_PROPERTY_CLAMP(prop,*var);
 226         return 1;
 227     }
 228     return m_property_int_ro(prop,action,arg,*var);
 229 }
 230
 231 int m_property_choice(m_option_t* prop,int action,
 232                       void* arg,int* var) {
 233     switch(action) {
 234     case M_PROPERTY_STEP_UP:
 235     case M_PROPERTY_STEP_DOWN:
 236         *var += action == M_PROPERTY_STEP_UP ? 1 : prop->max;
 237         *var %= (int)prop->max+1;
 238         return 1;
 239     }
 240     return m_property_int_range(prop,action,arg,var);
 241 }
 242
 243 int m_property_flag(m_option_t* prop,int action,
 244                     void* arg,int* var) {
 245     switch(action) {
 246     case M_PROPERTY_STEP_UP:
 247     case M_PROPERTY_STEP_DOWN:
 248         *var = *var == prop->min ? prop->max : prop->min;
 249         return 1;
 250     case M_PROPERTY_PRINT:
 251         if(!arg) return 0;
 252         *(char**)arg = strdup((*var > prop->min) ? MSGTR_Enabled : MSGTR_Disabled);
 253         return 1;
 254     }
 255     return m_property_int_range(prop,action,arg,var);
 256 }
 257
 258 int m_property_float_ro(m_option_t* prop,int action,
 259                         void* arg,float var) {
 260     switch(action) {
 261     case M_PROPERTY_GET:
 262         if(!arg) return 0;
 263         *(float*)arg = var;
 264         return 1;
 265     case M_PROPERTY_PRINT:
 266         if(!arg) return 0;
 267         *(char**)arg = malloc(20);
 268         sprintf(*(char**)arg,"%.2f",var);
 269         return 1;
 270     }
 271     return M_PROPERTY_NOT_IMPLEMENTED;
 272 }
 273
 274 int m_property_float_range(m_option_t* prop,int action,
 275                            void* arg,float* var) {
 276     switch(action) {
 277     case M_PROPERTY_SET:
 278         if(!arg) return 0;
 279         M_PROPERTY_CLAMP(prop,*(float*)arg);
 280         *var = *(float*)arg;
 281         return 1;
 282     case M_PROPERTY_STEP_UP:
 283     case M_PROPERTY_STEP_DOWN:
 284         *var += (arg ? *(float*)arg : 0.1) *
 285             (action == M_PROPERTY_STEP_DOWN ? -1 : 1);
 286         M_PROPERTY_CLAMP(prop,*var);
 287         return 1;
 288     }
 289     return m_property_float_ro(prop,action,arg,*var);
 290 }
 291
 292 int m_property_delay(m_option_t* prop,int action,
 293                      void* arg,float* var) {
 294     switch(action) {
 295     case M_PROPERTY_PRINT:
 296         if(!arg) return 0;
 297         *(char**)arg = malloc(20);
 298         sprintf(*(char**)arg,"%d ms",ROUND((*var)*1000));
 299         return 1;
 300     default:
 301         return m_property_float_range(prop,action,arg,var);
 302     }
 303 }
 304
 305 int m_property_double_ro(m_option_t* prop,int action,
 306                          void* arg,double var) {
 307     switch(action) {
 308     case M_PROPERTY_GET:
 309         if(!arg) return 0;
 310         *(double*)arg = var;
 311         return 1;
 312     case M_PROPERTY_PRINT:
 313         if(!arg) return 0;
 314         *(char**)arg = malloc(20);
 315         sprintf(*(char**)arg,"%.2f",var);
 316         return 1;
 317     }
 318     return M_PROPERTY_NOT_IMPLEMENTED;
 319 }
 320
 321 int m_property_time_ro(m_option_t* prop,int action,
 322                        void* arg,double var) {
 323     switch(action) {
 324     case M_PROPERTY_PRINT:
 325         if (!arg)
 326             return M_PROPERTY_ERROR;
 327         else {
 328             int h, m, s = var;
 329             h = s / 3600;
 330             s -= h * 3600;
 331             m = s / 60;
 332             s -= m * 60;
 333             *(char **) arg = malloc(20);
 334             if (h > 0)
 335                 sprintf(*(char **) arg, "%d:%02d:%02d", h, m, s);
 336             else if (m > 0)
 337                 sprintf(*(char **) arg, "%d:%02d", m, s);
 338             else
 339                 sprintf(*(char **) arg, "%d", s);
 340             return M_PROPERTY_OK;
 341         }
 342     }
 343     return m_property_double_ro(prop,action,arg,var);
 344 }
 345
 346 int m_property_string_ro(m_option_t* prop,int action,void* arg,char* str) {
 347     switch(action) {
 348     case M_PROPERTY_GET:
 349         if(!arg) return 0;
 350         *(char**)arg = str;
 351         return 1;
 352     case M_PROPERTY_PRINT:
 353         if(!arg) return 0;
 354         *(char**)arg = str ? strdup(str) : NULL;
 355         return 1;
 356     }
 357     return M_PROPERTY_NOT_IMPLEMENTED;
 358 }
 359
 360 int m_property_bitrate(m_option_t* prop,int action,void* arg,int rate) {
 361     switch(action) {
 362     case M_PROPERTY_PRINT:
 363         if (!arg)
 364             return M_PROPERTY_ERROR;
 365         *(char**)arg = malloc (16);
 366         sprintf(*(char**)arg, "%d kbps", rate*8/1000);
 367         return M_PROPERTY_OK;
 368     }
 369     return m_property_int_ro(prop, action, arg, rate);
 370 }