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(const m_option_t* prop_list, const char* name,
  21                      int action, void* arg, void *ctx) {
  22     const char* sep;
  23     const 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         *(const m_option_t**)arg = prop;
  44         return M_PROPERTY_OK;
  45     }
  46     return r;
  47 }
  48
  49 int m_property_do(const m_option_t* prop_list, const char* name,
  50                   int action, void* arg, void *ctx) {
  51     const 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(const 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             lvl++;
 148             if(!skip) {
 149                 int is_not = str[2] == '!';
 150                 int pl = e - str - (is_not ? 3 : 2);
 151                 char pname[pl+1];
 152                 memcpy(pname, str + (is_not ? 3 : 2), pl);
 153                 pname[pl] = 0;
 154                 if(m_property_do(prop_list,pname,M_PROPERTY_GET,NULL,ctx) < 0) {
 155                     if (!is_not)
 156                         skip = 1, skip_lvl = lvl;
 157                 }
 158                 else if (is_not)
 159                     skip = 1, skip_lvl = lvl;
 160             }
 161             str = e+1, l = 0;
 162         } else
 163             p = str, l = 1, str++;
 164
 165         if(skip || l <= 0) continue;
 166
 167         if(pos+l+1 > size) {
 168             size = pos+l+512;
 169             ret = realloc(ret,size);
 170         }
 171         memcpy(ret+pos,p,l);
 172         pos += l;
 173         if(fr) free(p), fr = 0;
 174     }
 175
 176     ret[pos] = 0;
 177     return ret;
 178 }
 179
 180 void m_properties_print_help_list(const m_option_t* list) {
 181     char min[50],max[50];
 182     int i,count = 0;
 183
 184     mp_msg(MSGT_CFGPARSER, MSGL_INFO, MSGTR_PropertyListHeader);
 185     for(i = 0 ; list[i].name ; i++) {
 186         const m_option_t* opt = &list[i];
 187         if(opt->flags & M_OPT_MIN)
 188             sprintf(min,"%-8.0f",opt->min);
 189         else
 190             strcpy(min,"No");
 191         if(opt->flags & M_OPT_MAX)
 192             sprintf(max,"%-8.0f",opt->max);
 193         else
 194             strcpy(max,"No");
 195         mp_msg(MSGT_CFGPARSER, MSGL_INFO, " %-20.20s %-15.15s %-10.10s %-10.10s\n",
 196                opt->name,
 197                opt->type->name,
 198                min,
 199                max);
 200         count++;
 201     }
 202     mp_msg(MSGT_CFGPARSER, MSGL_INFO, MSGTR_TotalProperties, count);
 203 }
 204
 205 // Some generic property implementations
 206
 207 int m_property_int_ro(const m_option_t* prop,int action,
 208                       void* arg,int var) {
 209     switch(action) {
 210     case M_PROPERTY_GET:
 211         if(!arg) return 0;
 212         *(int*)arg = var;
 213         return 1;
 214     }
 215     return M_PROPERTY_NOT_IMPLEMENTED;
 216 }
 217
 218 int m_property_int_range(const m_option_t* prop,int action,
 219                          void* arg,int* var) {
 220     switch(action) {
 221     case M_PROPERTY_SET:
 222         if(!arg) return 0;
 223         M_PROPERTY_CLAMP(prop,*(int*)arg);
 224         *var = *(int*)arg;
 225         return 1;
 226     case M_PROPERTY_STEP_UP:
 227     case M_PROPERTY_STEP_DOWN:
 228         *var += (arg ? *(int*)arg : 1) *
 229             (action == M_PROPERTY_STEP_DOWN ? -1 : 1);
 230         M_PROPERTY_CLAMP(prop,*var);
 231         return 1;
 232     }
 233     return m_property_int_ro(prop,action,arg,*var);
 234 }
 235
 236 int m_property_choice(const m_option_t* prop,int action,
 237                       void* arg,int* var) {
 238     switch(action) {
 239     case M_PROPERTY_STEP_UP:
 240     case M_PROPERTY_STEP_DOWN:
 241         *var += action == M_PROPERTY_STEP_UP ? 1 : prop->max;
 242         *var %= (int)prop->max+1;
 243         return 1;
 244     }
 245     return m_property_int_range(prop,action,arg,var);
 246 }
 247
 248 int m_property_flag_ro(const m_option_t* prop,int action,
 249                        void* arg,int var) {
 250     switch(action) {
 251     case M_PROPERTY_PRINT:
 252         if(!arg) return 0;
 253         *(char**)arg = strdup((var > prop->min) ? MSGTR_Enabled : MSGTR_Disabled);
 254         return 1;
 255     }
 256     return m_property_int_ro(prop,action,arg,var);
 257 }
 258
 259 int m_property_flag(const m_option_t* prop,int action,
 260                     void* arg,int* var) {
 261     switch(action) {
 262     case M_PROPERTY_STEP_UP:
 263     case M_PROPERTY_STEP_DOWN:
 264         *var = *var == prop->min ? prop->max : prop->min;
 265         return 1;
 266     case M_PROPERTY_PRINT:
 267         return m_property_flag_ro(prop, action, arg, *var);
 268     }
 269     return m_property_int_range(prop,action,arg,var);
 270 }
 271
 272 int m_property_float_ro(const m_option_t* prop,int action,
 273                         void* arg,float var) {
 274     switch(action) {
 275     case M_PROPERTY_GET:
 276         if(!arg) return 0;
 277         *(float*)arg = var;
 278         return 1;
 279     case M_PROPERTY_PRINT:
 280         if(!arg) return 0;
 281         *(char**)arg = malloc(20);
 282         sprintf(*(char**)arg,"%.2f",var);
 283         return 1;
 284     }
 285     return M_PROPERTY_NOT_IMPLEMENTED;
 286 }
 287
 288 int m_property_float_range(const m_option_t* prop,int action,
 289                            void* arg,float* var) {
 290     switch(action) {
 291     case M_PROPERTY_SET:
 292         if(!arg) return 0;
 293         M_PROPERTY_CLAMP(prop,*(float*)arg);
 294         *var = *(float*)arg;
 295         return 1;
 296     case M_PROPERTY_STEP_UP:
 297     case M_PROPERTY_STEP_DOWN:
 298         *var += (arg ? *(float*)arg : 0.1) *
 299             (action == M_PROPERTY_STEP_DOWN ? -1 : 1);
 300         M_PROPERTY_CLAMP(prop,*var);
 301         return 1;
 302     }
 303     return m_property_float_ro(prop,action,arg,*var);
 304 }
 305
 306 int m_property_delay(const m_option_t* prop,int action,
 307                      void* arg,float* var) {
 308     switch(action) {
 309     case M_PROPERTY_PRINT:
 310         if(!arg) return 0;
 311         *(char**)arg = malloc(20);
 312         sprintf(*(char**)arg,"%d ms",ROUND((*var)*1000));
 313         return 1;
 314     default:
 315         return m_property_float_range(prop,action,arg,var);
 316     }
 317 }
 318
 319 int m_property_double_ro(const m_option_t* prop,int action,
 320                          void* arg,double var) {
 321     switch(action) {
 322     case M_PROPERTY_GET:
 323         if(!arg) return 0;
 324         *(double*)arg = var;
 325         return 1;
 326     case M_PROPERTY_PRINT:
 327         if(!arg) return 0;
 328         *(char**)arg = malloc(20);
 329         sprintf(*(char**)arg,"%.2f",var);
 330         return 1;
 331     }
 332     return M_PROPERTY_NOT_IMPLEMENTED;
 333 }
 334
 335 int m_property_time_ro(const m_option_t* prop,int action,
 336                        void* arg,double var) {
 337     switch(action) {
 338     case M_PROPERTY_PRINT:
 339         if (!arg)
 340             return M_PROPERTY_ERROR;
 341         else {
 342             int h, m, s = var;
 343             h = s / 3600;
 344             s -= h * 3600;
 345             m = s / 60;
 346             s -= m * 60;
 347             *(char **) arg = malloc(20);
 348             if (h > 0)
 349                 sprintf(*(char **) arg, "%d:%02d:%02d", h, m, s);
 350             else if (m > 0)
 351                 sprintf(*(char **) arg, "%d:%02d", m, s);
 352             else
 353                 sprintf(*(char **) arg, "%d", s);
 354             return M_PROPERTY_OK;
 355         }
 356     }
 357     return m_property_double_ro(prop,action,arg,var);
 358 }
 359
 360 int m_property_string_ro(const m_option_t* prop,int action,void* arg,char* str) {
 361     switch(action) {
 362     case M_PROPERTY_GET:
 363         if(!arg) return 0;
 364         *(char**)arg = str;
 365         return 1;
 366     case M_PROPERTY_PRINT:
 367         if(!arg) return 0;
 368         *(char**)arg = str ? strdup(str) : NULL;
 369         return 1;
 370     }
 371     return M_PROPERTY_NOT_IMPLEMENTED;
 372 }
 373
 374 int m_property_bitrate(const m_option_t* prop,int action,void* arg,int rate) {
 375     switch(action) {
 376     case M_PROPERTY_PRINT:
 377         if (!arg)
 378             return M_PROPERTY_ERROR;
 379         *(char**)arg = malloc (16);
 380         sprintf(*(char**)arg, "%d kbps", rate*8/1000);
 381         return M_PROPERTY_OK;
 382     }
 383     return m_property_int_ro(prop, action, arg, rate);
 384 }