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mpv/m_property.c

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