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tag: add function to check whether a string is a valid language code

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API: gst_tag_check_language_code()
This commit is contained in:
Tim-Philipp Müller 2012-01-02 00:59:39 +00:00
parent c3e6e23b85
commit 76cc8b8f2a
5 changed files with 38 additions and 4 deletions
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1
docs/libs/gst-plugins-base-libs-sections.txt
View file

@ -1971,6 +1971,7 @@ gst_tag_get_language_code
gst_tag_get_language_code_iso_639_1
gst_tag_get_language_code_iso_639_2B
gst_tag_get_language_code_iso_639_2T
gst_tag_check_language_code
</SECTION>
<SECTION>

28
gst-libs/gst/tag/lang.c
View file

@ -30,8 +30,6 @@
* </refsect2>
*/
/* FIXME 0.11: maybe switch to ISO-639-2 everywhere incl. GST_TAG_LANGUAGE? */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
@ -311,8 +309,8 @@ gst_tag_get_language_codes (void)
* gst_tag_get_language_name:
* @language_code: two or three-letter ISO-639 language code
*
* Returns the name of the language given an ISO-639 language code, such
* as often found in a GST_TAG_LANGUAGE tag. The name will be translated
* Returns the name of the language given an ISO-639 language code as
* found in a GST_TAG_LANGUAGE_CODE tag. The name will be translated
* according to the current locale (if the library was built against the
* iso-codes package, otherwise the English name will be returned).
*
@ -492,3 +490,25 @@ gst_tag_get_language_code_iso_639_2B (const gchar * lang_code)
return c;
}
/**
* gst_tag_check_language_code:
* @lang_code: ISO-639 language code (e.g. "deu" or "ger" or "de")
*
* Check if a given string contains a known ISO 639 language code.
*
* This is useful in situations where it's not clear whether a given
* string is a language code (which should be put into a #GST_TAG_LANGUAGE_CODE
* tag) or a free-form language name descriptor (which should be put into a
* #GST_TAG_LANGUAGE_NAME tag instead).
*
* Returns: TRUE if the two- or three-letter language code in @lang_code
* is a valid ISO-639 language code.
*
* Since: 0.10.37
*/
gboolean
gst_tag_check_language_code (const gchar * lang_code)
{
return (gst_tag_get_language_code_iso_639_1 (lang_code) != NULL);
}

2
gst-libs/gst/tag/tag.h
View file

@ -551,6 +551,8 @@ const gchar * gst_tag_get_language_code_iso_639_2B (const gchar * lang_code);
const gchar * gst_tag_get_language_code_iso_639_2T (const gchar * lang_code);
gboolean gst_tag_check_language_code (const gchar * lang_code);
/**
* gst_tag_get_language_code:
* @lang_code: ISO-639 language code (e.g. "deu" or "ger" or "de")

10
tests/check/libs/tag.c
View file

@ -748,6 +748,16 @@ GST_START_TEST (test_language_utils)
ASSERT_STRINGS_EQUAL (gst_tag_get_language_code_iso_639_2B ("de"), "ger");
ASSERT_STRINGS_EQUAL (gst_tag_get_language_code_iso_639_2B ("deu"), "ger");
ASSERT_STRINGS_EQUAL (gst_tag_get_language_code_iso_639_2B ("ger"), "ger");
fail_unless (gst_tag_check_language_code ("de"));
fail_unless (gst_tag_check_language_code ("deu"));
fail_unless (gst_tag_check_language_code ("ger"));
fail_if (gst_tag_check_language_code ("xxx"));
fail_if (gst_tag_check_language_code ("und"));
fail_if (gst_tag_check_language_code ("un"));
fail_if (gst_tag_check_language_code (""));
fail_if (gst_tag_check_language_code ("\377"));
fail_if (gst_tag_check_language_code ("deutsch"));
}
GST_END_TEST;

1
win32/common/libgsttag.def
View file

@ -1,4 +1,5 @@
EXPORTS
gst_tag_check_language_code
gst_tag_demux_get_type
gst_tag_demux_result_get_type
gst_tag_freeform_string_to_utf8