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mpegts: Add ISO 639 parsing functions
https://bugzilla.gnome.org/show_bug.cgi?id=709180
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2 changed files with 59 additions and 3 deletions
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@ -634,6 +634,61 @@ gst_mpegts_descriptor_parse_iso_639_language (const GstMpegTsDescriptor *
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}
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/**
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* gst_mpegts_descriptor_parse_iso_639_language_idx:
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* @descriptor: a %GST_MTS_DESC_ISO_639_LANGUAGE #GstMpegTsDescriptor
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* @idx: Table id of the language to parse
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* @lang (out) (transfer none): 4-byte gchar array to hold the language code
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* @audio_type: (out) (transfer none): the #GstMpegTsIso639AudioType to set
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*
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* Extracts the iso 639-2 language information from specific table id in @descriptor.
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*
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* Note: Use #gst_tag_get_language_code if you want to get the the
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* ISO 639-1 language code from the returned ISO 639-2 one.
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*
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* Returns: %TRUE if parsing succeeded, else %FALSE.
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*/
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gboolean
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gst_mpegts_descriptor_parse_iso_639_language_idx (const GstMpegTsDescriptor *
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descriptor, guint idx, gchar (*lang)[4],
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GstMpegTsIso639AudioType * audio_type)
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{
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guint8 *data;
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g_return_val_if_fail (descriptor != NULL && descriptor->data != NULL, FALSE);
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g_return_val_if_fail (lang != NULL, FALSE);
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g_return_val_if_fail (descriptor->tag == GST_MTS_DESC_ISO_639_LANGUAGE,
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FALSE);
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g_return_val_if_fail (audio_type != NULL, FALSE);
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g_return_val_if_fail (descriptor->length / 4 > idx, FALSE);
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data = (guint8 *) descriptor->data + 2 + idx * 4;
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memcpy (lang, data, 3);
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*lang[3] = 0;
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data += 3;
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*audio_type = *data;
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return TRUE;
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}
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/**
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* gst_mpegts_descriptor_parse_iso_639_language_nb:
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* @descriptor: a %GST_MTS_DESC_ISO_639_LANGUAGE #GstMpegTsDescriptor
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*
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* Returns: The number of languages in @descriptor
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*/
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guint
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gst_mpegts_descriptor_parse_iso_639_language_nb (const GstMpegTsDescriptor *
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descriptor)
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{
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g_return_val_if_fail (descriptor != NULL && descriptor->data != NULL, 0);
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return descriptor->length / 4;
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}
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/**
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* gst_mpegts_descriptor_parse_logical_channel:
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* @descriptor: a %GST_MTS_DESC_DTG_LOGICAL_CHANNEL #GstMpegTsDescriptor
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@ -275,9 +275,6 @@ typedef enum {
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GST_MPEGTS_AUDIO_TYPE_VISUAL_IMPAIRED_COMMENTARY
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} GstMpegTsIso639AudioType;
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/* FIXME: Make two methods. One for getting the number of languages,
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* and the other for getting the (allocated, null-terminated) language
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* and audio type */
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typedef struct _GstMpegTsISO639LanguageDescriptor GstMpegTsISO639LanguageDescriptor;
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struct _GstMpegTsISO639LanguageDescriptor
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{
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@ -288,6 +285,10 @@ struct _GstMpegTsISO639LanguageDescriptor
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gboolean gst_mpegts_descriptor_parse_iso_639_language (const GstMpegTsDescriptor *descriptor,
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GstMpegTsISO639LanguageDescriptor *res);
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gboolean gst_mpegts_descriptor_parse_iso_639_language_idx (const GstMpegTsDescriptor *descriptor,
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guint idx, gchar (*lang)[4],
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GstMpegTsIso639AudioType *audio_type);
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guint gst_mpegts_descriptor_parse_iso_639_language_nb (const GstMpegTsDescriptor *descriptor);
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