*/
/**
- * @file libavfilter/parseutils.c
+ * @file
* parsing utils
*/
#include <strings.h>
#include "libavutil/avutil.h"
+#include "libavutil/avstring.h"
#include "libavutil/random_seed.h"
#include "parseutils.h"
-#define WHITESPACES " \n\t"
-
-char *av_get_token(const char **buf, const char *term)
-{
- char *out = av_malloc(strlen(*buf) + 1);
- char *ret= out, *end= out;
- const char *p = *buf;
- p += strspn(p, WHITESPACES);
-
- while(*p && !strspn(p, term)) {
- char c = *p++;
- if(c == '\\' && *p){
- *out++ = *p++;
- end= out;
- }else if(c == '\''){
- while(*p && *p != '\'')
- *out++ = *p++;
- if(*p){
- p++;
- end= out;
- }
- }else{
- *out++ = c;
- }
- }
-
- do{
- *out-- = 0;
- }while(out >= end && strspn(out, WHITESPACES));
-
- *buf = p;
-
- return ret;
-}
-
typedef struct {
const char *name; ///< a string representing the name of the color
- uint8_t rgba_color[4]; ///< RGBA values for the color
+ uint8_t rgb_color[3]; ///< RGB values for the color
} ColorEntry;
static ColorEntry color_table[] = {
return strcasecmp(lhs, ((const ColorEntry *)rhs)->name);
}
+#define ALPHA_SEP '@'
+
int av_parse_color(uint8_t *rgba_color, const char *color_string, void *log_ctx)
{
- if (!strcasecmp(color_string, "random") || !strcasecmp(color_string, "bikeshed")) {
- int rgba = ff_random_get_seed();
+ char *tail, color_string2[128];
+ const ColorEntry *entry;
+ av_strlcpy(color_string2, color_string, sizeof(color_string2));
+ if ((tail = strchr(color_string2, ALPHA_SEP)))
+ *tail++ = 0;
+ rgba_color[3] = 255;
+
+ if (!strcasecmp(color_string2, "random") || !strcasecmp(color_string2, "bikeshed")) {
+ int rgba = av_get_random_seed();
rgba_color[0] = rgba >> 24;
rgba_color[1] = rgba >> 16;
rgba_color[2] = rgba >> 8;
rgba_color[3] = rgba;
- } else
- if (!strncmp(color_string, "0x", 2)) {
+ } else if (!strncmp(color_string2, "0x", 2)) {
char *tail;
- int len = strlen(color_string);
- int rgba = strtol(color_string, &tail, 16);
+ int len = strlen(color_string2);
+ unsigned int rgba = strtoul(color_string2, &tail, 16);
if (*tail || (len != 8 && len != 10)) {
- av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string);
- return -1;
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2);
+ return AVERROR(EINVAL);
}
if (len == 10) {
rgba_color[3] = rgba;
rgba_color[1] = rgba >> 8;
rgba_color[2] = rgba;
} else {
- const ColorEntry *entry = bsearch(color_string,
- color_table,
- FF_ARRAY_ELEMS(color_table),
- sizeof(ColorEntry),
- color_table_compare);
+ entry = bsearch(color_string2,
+ color_table,
+ FF_ARRAY_ELEMS(color_table),
+ sizeof(ColorEntry),
+ color_table_compare);
if (!entry) {
- av_log(log_ctx, AV_LOG_DEBUG, "Cannot find color '%s'\n", color_string);
- return -1;
+ av_log(log_ctx, AV_LOG_ERROR, "Cannot find color '%s'\n", color_string2);
+ return AVERROR(EINVAL);
}
- memcpy(rgba_color, entry->rgba_color, 4);
+ memcpy(rgba_color, entry->rgb_color, 3);
+ }
+
+ if (tail) {
+ unsigned long int alpha;
+ const char *alpha_string = tail;
+ if (!strncmp(alpha_string, "0x", 2)) {
+ alpha = strtoul(alpha_string, &tail, 16);
+ } else {
+ alpha = strtoul(alpha_string, &tail, 10);
+ if (*tail) {
+ double d = strtod(alpha_string, &tail);
+ alpha = d * 255;
+ }
+ }
+
+ if (tail == alpha_string || *tail || alpha > 255) {
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid alpha value specifier '%s' in '%s'\n",
+ alpha_string, color_string);
+ return AVERROR(EINVAL);
+ }
+ rgba_color[3] = alpha;
}
return 0;
{
int i;
- const char *strings[] = {
- "''",
- "",
- ":",
- "\\",
- "'",
- " '' :",
- " '' '' :",
- "foo '' :",
- "'foo'",
- "foo ",
- "foo\\",
- "foo': blah:blah",
- "foo\\: blah:blah",
- "foo\'",
- "'foo : ' :blahblah",
- "\\ :blah",
- " foo",
- " foo ",
- " foo \\ ",
- "foo ':blah",
- " foo bar : blahblah",
- "\\f\\o\\o",
- "'foo : \\ \\ ' : blahblah",
- "'\\fo\\o:': blahblah",
- "\\'fo\\o\\:': foo ' :blahblah"
- };
-
- for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
- const char *p= strings[i];
- printf("|%s|", p);
- printf(" -> |%s|", av_get_token(&p, ":"));
- printf(" + |%s|\n", p);
- }
-
printf("\nTesting av_parse_color()\n");
{
uint8_t rgba[4];
"Red",
"0x000000",
"0x0000000",
+ "0xff000000",
"0x3e34ff",
"0x3e34ffaa",
"0xffXXee",
"0xfoobar",
"0xffffeeeeeeee",
+ "red@foo",
+ "random@10",
+ "0xff0000@1.0",
+ "red@",
+ "red@0xfff",
+ "red@0xf",
+ "red@2",
+ "red@0.1",
+ "red@-1",
+ "red@0.5",
+ "red@1.0",
+ "red@256",
+ "red@10foo",
+ "red@-1.0",
+ "red@-0.0",
};
av_log_set_level(AV_LOG_DEBUG);