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subparse: Convert regex code to GRegex code

Browse source 
Fixes: #572993.  Patch author prefers to use an alias, contact
ds if you actually need a real name.

Signed-off-by: David Schleef <ds@schleef.org>
This commit is contained in:
LRN 2009-02-28 15:23:20 -08:00 committed by David Schleef
parent 9045d210b2
commit db596d27a2
1 changed files with 55 additions and 20 deletions
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75
gst/subparse/gstsubparse.c
View file

@ -26,6 +26,7 @@
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <glib.h>
#include <regex.h>
#include "gstsubparse.h"
@ -969,6 +970,44 @@ parser_state_dispose (ParserState * state)
#endif
}
/* regex type enum */
typedef enum
{
GST_SUB_PARSE_REGEX_UNKNOWN = 0,
GST_SUB_PARSE_REGEX_MDVDSUB = 1,
GST_SUB_PARSE_REGEX_SUBRIP = 2,
} GstSubParseRegex;
static gpointer
gst_sub_parse_data_format_autodetect_regex_once (GstSubParseRegex regtype)
{
gpointer result = NULL;
GError *gerr = NULL;
switch (regtype) {
case GST_SUB_PARSE_REGEX_MDVDSUB:
result =
(gpointer) g_regex_new ("^\\{[0-9]+\\}\\{[0-9]+\\}", 0, 0, &gerr);
if (result == NULL) {
g_warning ("Compilation of mdvd regex failed: %s", gerr->message);
g_error_free (gerr);
}
break;
case GST_SUB_PARSE_REGEX_SUBRIP:
result = (gpointer) g_regex_new ("^([ 0-9]){0,3}[0-9](\x0d)?\x0a"
"[ 0-9][0-9]:[ 0-9][0-9]:[ 0-9][0-9],[ 0-9]{2}[0-9]"
" --> ([ 0-9])?[0-9]:[ 0-9][0-9]:[ 0-9][0-9],[ 0-9]{2}[0-9]",
0, 0, &gerr);
if (result == NULL) {
g_warning ("Compilation of subrip regex failed: %s", gerr->message);
g_error_free (gerr);
}
break;
default:
GST_WARNING ("Trying to allocate regex of unknown type %u", regtype);
}
return result;
}
/*
* FIXME: maybe we should pass along a second argument, the preceding
* text buffer, because that is how this originally worked, even though
@ -978,33 +1017,29 @@ parser_state_dispose (ParserState * state)
static GstSubParseFormat
gst_sub_parse_data_format_autodetect (gchar * match_str)
{
static gboolean need_init_regexps = TRUE;
static regex_t mdvd_rx;
static regex_t subrip_rx;
guint n1, n2, n3;
/* initialize the regexps used the first time around */
if (need_init_regexps) {
int err;
char errstr[128];
static GOnce mdvd_rx_once = G_ONCE_INIT;
static GOnce subrip_rx_once = G_ONCE_INIT;
need_init_regexps = FALSE;
if ((err = regcomp (&mdvd_rx, "^\\{[0-9]+\\}\\{[0-9]+\\}",
REG_EXTENDED | REG_NEWLINE | REG_NOSUB) != 0) ||
(err = regcomp (&subrip_rx, "^([ 0-9]){0,3}[0-9](\x0d)?\x0a"
"[ 0-9][0-9]:[ 0-9][0-9]:[ 0-9][0-9],[ 0-9]{2}[0-9]"
" --> ([ 0-9])?[0-9]:[ 0-9][0-9]:[ 0-9][0-9],[ 0-9]{2}[0-9]",
REG_EXTENDED | REG_NEWLINE | REG_NOSUB)) != 0) {
regerror (err, &subrip_rx, errstr, 127);
GST_WARNING ("Compilation of subrip regex failed: %s", errstr);
}
}
GRegex *mdvd_grx;
GRegex *subrip_grx;
if (regexec (&mdvd_rx, match_str, 0, NULL, 0) == 0) {
g_once (&mdvd_rx_once,
(GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
(gpointer) GST_SUB_PARSE_REGEX_MDVDSUB);
g_once (&subrip_rx_once,
(GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
(gpointer) GST_SUB_PARSE_REGEX_SUBRIP);
mdvd_grx = (GRegex *) mdvd_rx_once.retval;
subrip_grx = (GRegex *) subrip_rx_once.retval;
if (g_regex_match (mdvd_grx, match_str, 0, NULL) == TRUE) {
GST_LOG ("MicroDVD (frame based) format detected");
return GST_SUB_PARSE_FORMAT_MDVDSUB;
}
if (regexec (&subrip_rx, match_str, 0, NULL, 0) == 0) {
if (g_regex_match (subrip_grx, match_str, 0, NULL) == TRUE) {
GST_LOG ("SubRip (time based) format detected");
return GST_SUB_PARSE_FORMAT_SUBRIP;
}