mirror of
https://github.com/mpv-player/mpv
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bfc3dbae88
The m_option_value union is supposed to contain a field for each possible option type (as long as it actually stores data). This helps avoiding silly temporary memory alocations. Using a pointer to an union and to a field of the union interchangeably should be allowed by standard C.
424 lines
12 KiB
C
424 lines
12 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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 along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/// \file
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/// \ingroup Properties
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include "talloc.h"
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#include "m_option.h"
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#include "m_property.h"
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#include "mp_msg.h"
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#include "mpcommon.h"
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static int do_action(const m_option_t *prop_list, const char *name,
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int action, void *arg, void *ctx)
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{
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const char *sep;
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const m_option_t *prop;
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m_property_action_t ka;
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int r;
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if ((sep = strchr(name, '/')) && sep[1]) {
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int len = sep - name;
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char base[len + 1];
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memcpy(base, name, len);
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base[len] = 0;
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prop = m_option_list_find(prop_list, base);
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ka.key = sep + 1;
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ka.action = action;
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ka.arg = arg;
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action = M_PROPERTY_KEY_ACTION;
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arg = &ka;
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} else
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prop = m_option_list_find(prop_list, name);
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if (!prop)
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return M_PROPERTY_UNKNOWN;
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r = ((m_property_ctrl_f)prop->p)(prop, action, arg, ctx);
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if (action == M_PROPERTY_GET_TYPE && r < 0) {
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if (!arg)
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return M_PROPERTY_ERROR;
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*(const m_option_t **)arg = prop;
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return M_PROPERTY_OK;
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}
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return r;
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}
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int m_property_do(const m_option_t *prop_list, const char *name,
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int action, void *arg, void *ctx)
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{
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const m_option_t *opt;
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union m_option_value val = {0};
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int r;
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switch (action) {
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case M_PROPERTY_PRINT:
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if ((r = do_action(prop_list, name, M_PROPERTY_PRINT, arg, ctx)) >= 0)
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return r;
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// fallback on the default print for this type
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case M_PROPERTY_TO_STRING:
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if ((r = do_action(prop_list, name, M_PROPERTY_TO_STRING, arg, ctx)) !=
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M_PROPERTY_NOT_IMPLEMENTED)
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return r;
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// fallback on the options API. Get the type, value and print.
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if ((r =
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do_action(prop_list, name, M_PROPERTY_GET_TYPE, &opt, ctx)) <= 0)
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return r;
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if ((r = do_action(prop_list, name, M_PROPERTY_GET, &val, ctx)) <= 0)
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return r;
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if (!arg)
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return M_PROPERTY_ERROR;
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char *str = m_option_print(opt, &val);
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*(char **)arg = str;
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return str != NULL;
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case M_PROPERTY_PARSE:
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// try the property own parsing func
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if ((r = do_action(prop_list, name, M_PROPERTY_PARSE, arg, ctx)) !=
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M_PROPERTY_NOT_IMPLEMENTED)
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return r;
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// fallback on the options API, get the type and parse.
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if ((r =
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do_action(prop_list, name, M_PROPERTY_GET_TYPE, &opt, ctx)) <= 0)
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return r;
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if (!arg)
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return M_PROPERTY_ERROR;
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if ((r = m_option_parse(opt, bstr0(opt->name), bstr0(arg), &val)) <= 0)
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return r;
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r = do_action(prop_list, name, M_PROPERTY_SET, &val, ctx);
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m_option_free(opt, &val);
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return r;
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}
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return do_action(prop_list, name, action, arg, ctx);
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}
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char *m_properties_expand_string(const m_option_t *prop_list, char *str,
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void *ctx)
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{
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int l, fr = 0, pos = 0, size = strlen(str) + 512;
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char *p = NULL, *e, *ret = malloc(size), num_val;
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int skip = 0, lvl = 0, skip_lvl = 0;
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while (str[0]) {
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if (str[0] == '\\') {
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int sl = 1;
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switch (str[1]) {
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case 'e':
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p = "\x1b", l = 1; break;
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case 'n':
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p = "\n", l = 1; break;
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case 'r':
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p = "\r", l = 1; break;
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case 't':
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p = "\t", l = 1; break;
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case 'x':
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if (str[2]) {
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char num[3] = { str[2], str[3], 0 };
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char *end = num;
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num_val = strtol(num, &end, 16);
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sl = end - num + 1;
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l = 1;
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p = &num_val;
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} else
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l = 0;
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break;
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default:
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p = str + 1, l = 1;
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}
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str += 1 + sl;
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} else if (lvl > 0 && str[0] == ')') {
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if (skip && lvl <= skip_lvl)
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skip = 0;
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lvl--, str++, l = 0;
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} else if (str[0] == '$' && str[1] == '{'
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&& (e = strchr(str + 2, '}'))) {
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str += 2;
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int method = M_PROPERTY_PRINT;
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if (str[0] == '=') {
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str += 1;
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method = M_PROPERTY_TO_STRING;
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}
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int pl = e - str;
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char pname[pl + 1];
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memcpy(pname, str, pl);
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pname[pl] = 0;
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if (m_property_do(prop_list, pname, method, &p, ctx) >= 0 && p)
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l = strlen(p), fr = 1;
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else
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l = 0;
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str = e + 1;
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} else if (str[0] == '?' && str[1] == '('
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&& (e = strchr(str + 2, ':'))) {
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lvl++;
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if (!skip) {
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int is_not = str[2] == '!';
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int pl = e - str - (is_not ? 3 : 2);
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char pname[pl + 1];
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memcpy(pname, str + (is_not ? 3 : 2), pl);
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pname[pl] = 0;
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if (m_property_do(prop_list, pname, M_PROPERTY_GET, NULL, ctx) < 0) {
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if (!is_not)
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skip = 1, skip_lvl = lvl;
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} else if (is_not)
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skip = 1, skip_lvl = lvl;
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}
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str = e + 1, l = 0;
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} else
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p = str, l = 1, str++;
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if (skip || l <= 0)
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continue;
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if (pos + l + 1 > size) {
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size = pos + l + 512;
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ret = realloc(ret, size);
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}
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memcpy(ret + pos, p, l);
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pos += l;
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if (fr)
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talloc_free(p), fr = 0;
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}
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ret[pos] = 0;
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return ret;
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}
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void m_properties_print_help_list(const m_option_t *list)
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{
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char min[50], max[50];
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int i, count = 0;
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mp_tmsg(MSGT_CFGPARSER, MSGL_INFO,
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"\n Name Type Min Max\n\n");
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for (i = 0; list[i].name; i++) {
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const m_option_t *opt = &list[i];
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if (opt->flags & M_OPT_MIN)
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sprintf(min, "%-8.0f", opt->min);
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else
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strcpy(min, "No");
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if (opt->flags & M_OPT_MAX)
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sprintf(max, "%-8.0f", opt->max);
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else
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strcpy(max, "No");
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mp_msg(MSGT_CFGPARSER, MSGL_INFO,
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" %-20.20s %-15.15s %-10.10s %-10.10s\n",
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opt->name,
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opt->type->name,
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min,
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max);
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count++;
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}
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mp_tmsg(MSGT_CFGPARSER, MSGL_INFO, "\nTotal: %d properties\n", count);
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}
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// Some generic property implementations
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int m_property_int_ro(const m_option_t *prop, int action,
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void *arg, int var)
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{
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switch (action) {
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case M_PROPERTY_GET:
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if (!arg)
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return 0;
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*(int *)arg = var;
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return 1;
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}
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return M_PROPERTY_NOT_IMPLEMENTED;
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}
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int m_property_int_range(const m_option_t *prop, int action,
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void *arg, int *var)
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{
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switch (action) {
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case M_PROPERTY_SET:
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if (!arg)
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return 0;
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M_PROPERTY_CLAMP(prop, *(int *)arg);
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*var = *(int *)arg;
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return 1;
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case M_PROPERTY_STEP_UP:
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case M_PROPERTY_STEP_DOWN:
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*var += (arg ? *(int *)arg : 1) *
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(action == M_PROPERTY_STEP_DOWN ? -1 : 1);
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M_PROPERTY_CLAMP(prop, *var);
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return 1;
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}
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return m_property_int_ro(prop, action, arg, *var);
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}
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int m_property_choice(const m_option_t *prop, int action,
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void *arg, int *var)
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{
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switch (action) {
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case M_PROPERTY_STEP_UP:
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case M_PROPERTY_STEP_DOWN:
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*var += action == M_PROPERTY_STEP_UP ? 1 : prop->max;
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*var %= (int)prop->max + 1;
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return 1;
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}
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return m_property_int_range(prop, action, arg, var);
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}
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int m_property_flag_ro(const m_option_t *prop, int action,
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void *arg, int var)
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{
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switch (action) {
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case M_PROPERTY_PRINT:
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if (!arg)
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return 0;
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*(char **)arg = talloc_strdup(NULL, (var > prop->min) ?
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mp_gtext("enabled") : mp_gtext("disabled"));
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return 1;
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}
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return m_property_int_ro(prop, action, arg, var);
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}
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int m_property_flag(const m_option_t *prop, int action,
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void *arg, int *var)
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{
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switch (action) {
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case M_PROPERTY_STEP_UP:
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case M_PROPERTY_STEP_DOWN:
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*var = *var == prop->min ? prop->max : prop->min;
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return 1;
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case M_PROPERTY_PRINT:
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return m_property_flag_ro(prop, action, arg, *var);
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}
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return m_property_int_range(prop, action, arg, var);
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}
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int m_property_float_ro(const m_option_t *prop, int action,
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void *arg, float var)
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{
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switch (action) {
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case M_PROPERTY_GET:
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if (!arg)
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return 0;
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*(float *)arg = var;
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return 1;
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case M_PROPERTY_PRINT:
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if (!arg)
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return 0;
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*(char **)arg = talloc_asprintf(NULL, "%.2f", var);
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return 1;
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}
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return M_PROPERTY_NOT_IMPLEMENTED;
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}
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int m_property_float_range(const m_option_t *prop, int action,
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void *arg, float *var)
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{
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switch (action) {
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case M_PROPERTY_SET:
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if (!arg)
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return 0;
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M_PROPERTY_CLAMP(prop, *(float *)arg);
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*var = *(float *)arg;
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return 1;
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case M_PROPERTY_STEP_UP:
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case M_PROPERTY_STEP_DOWN:
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*var += (arg ? *(float *)arg : 0.1) *
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(action == M_PROPERTY_STEP_DOWN ? -1 : 1);
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M_PROPERTY_CLAMP(prop, *var);
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return 1;
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}
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return m_property_float_ro(prop, action, arg, *var);
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}
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int m_property_delay(const m_option_t *prop, int action,
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void *arg, float *var)
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{
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switch (action) {
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case M_PROPERTY_PRINT:
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if (!arg)
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return 0;
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*(char **)arg = talloc_asprintf(NULL, "%d ms", ROUND((*var) * 1000));
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return 1;
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default:
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return m_property_float_range(prop, action, arg, var);
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}
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}
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int m_property_double_ro(const m_option_t *prop, int action,
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void *arg, double var)
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{
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switch (action) {
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case M_PROPERTY_GET:
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if (!arg)
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return 0;
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*(double *)arg = var;
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return 1;
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case M_PROPERTY_PRINT:
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if (!arg)
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return 0;
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*(char **)arg = talloc_asprintf(NULL, "%.2f", var);
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return 1;
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}
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return M_PROPERTY_NOT_IMPLEMENTED;
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}
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int m_property_time_ro(const m_option_t *prop, int action,
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void *arg, double var)
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{
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switch (action) {
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case M_PROPERTY_PRINT:
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if (!arg)
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return M_PROPERTY_ERROR;
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else {
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*(char **)arg = mp_format_time(var, false);
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return M_PROPERTY_OK;
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}
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}
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return m_property_double_ro(prop, action, arg, var);
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}
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int m_property_string_ro(const m_option_t *prop, int action, void *arg,
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char *str)
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{
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switch (action) {
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case M_PROPERTY_GET:
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if (!arg)
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return 0;
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*(char **)arg = str;
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return 1;
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case M_PROPERTY_PRINT:
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if (!arg)
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return 0;
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*(char **)arg = talloc_strdup(NULL, str);
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return 1;
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}
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return M_PROPERTY_NOT_IMPLEMENTED;
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}
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int m_property_bitrate(const m_option_t *prop, int action, void *arg, int rate)
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{
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switch (action) {
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case M_PROPERTY_PRINT:
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if (!arg)
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return M_PROPERTY_ERROR;
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*(char **)arg = talloc_asprintf(NULL, "%d kbps", rate * 8 / 1000);
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return M_PROPERTY_OK;
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}
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return m_property_int_ro(prop, action, arg, rate);
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}
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