WEBVTT_EXPORT webvtt_status
webvtt_create_cue( webvtt_cue **pcue )
{
webvtt_cue *cue;
if( !pcue ) {
return WEBVTT_INVALID_PARAM;
}
cue = (webvtt_cue *)webvtt_alloc0( sizeof(*cue) );
if( !cue ) {
return WEBVTT_OUT_OF_MEMORY;
}
/**
* From http://dev.w3.org/html5/webvtt/#parsing (10/25/2012)
*
* Let cue's text track cue snap-to-lines flag be true.
*
* Let cue's text track cue line position be auto.
*
* Let cue's text track cue text position be 50.
*
* Let cue's text track cue size be 100.
*
* Let cue's text track cue alignment be middle alignment.
*/
webvtt_ref( &cue->refs );
webvtt_init_string( &cue->id );
webvtt_init_string( &cue->body );
cue->from = 0xFFFFFFFFFFFFFFFF;
cue->until = 0xFFFFFFFFFFFFFFFF;
cue->snap_to_lines = 1;
cue->settings.position = 50;
cue->settings.size = 100;
cue->settings.align = WEBVTT_ALIGN_MIDDLE;
cue->settings.line = WEBVTT_AUTO;
cue->settings.vertical = WEBVTT_HORIZONTAL;
*pcue = cue;
return WEBVTT_SUCCESS;
}
WEBVTT_INTERN webvtt_status
webvtt_create_head_node( webvtt_node **node )
{
webvtt_status status;
webvtt_string temp_annotation;
webvtt_init_string( &temp_annotation );
if( WEBVTT_FAILED( status = webvtt_create_internal_node( node, NULL, WEBVTT_HEAD_NODE, NULL, &temp_annotation ) ) ) {
return status;
}
return WEBVTT_SUCCESS;
}
/**
* Need to set up differently.
* Get a status in order to return at end and release memeory.
*/
WEBVTT_INTERN webvtt_status
webvtt_cuetext_tokenizer( webvtt_byte **position, webvtt_cuetext_token **token )
{
webvtt_token_state token_state = DATA;
webvtt_string result, annotation;
webvtt_stringlist *css_classes;
webvtt_timestamp time_stamp = 0;
webvtt_status status = WEBVTT_UNFINISHED;
if( !position ) {
return WEBVTT_INVALID_PARAM;
}
webvtt_create_string( 10, &result );
webvtt_create_string( 10, &annotation );
webvtt_create_stringlist( &css_classes );
/**
* Loop while the tokenizer is not finished.
* Based on the state of the tokenizer enter a function to handle that
* particular tokenizer state. Those functions will loop until they either
* change the state of the tokenizer or reach a valid token end point.
*/
while( status == WEBVTT_UNFINISHED ) {
switch( token_state ) {
case DATA :
status = webvtt_data_state( position, &token_state, &result );
break;
case ESCAPE:
status = webvtt_escape_state( position, &token_state, &result );
break;
case TAG:
status = webvtt_tag_state( position, &token_state, &result );
break;
case START_TAG:
status = webvtt_start_tag_state( position, &token_state, &result );
break;
case START_TAG_CLASS:
status = webvtt_class_state( position, &token_state, css_classes );
break;
case START_TAG_ANNOTATION:
status = webvtt_annotation_state( position, &token_state, &annotation );
break;
case END_TAG:
status = webvtt_end_tag_state( position, &token_state, &result );
break;
case TIME_STAMP_TAG:
status = webvtt_timestamp_state( position, &token_state, &result );
break;
}
if( token_state == START_TAG_ANNOTATION ) {
webvtt_skipwhite( position );
}
}
if( **position == UTF8_GREATER_THAN )
{ (*position)++; }
if( status == WEBVTT_SUCCESS ) {
/**
* The state that the tokenizer left off on will tell us what kind of token
* needs to be made.
*/
if( token_state == DATA || token_state == ESCAPE ) {
status = webvtt_create_text_token( token, &result );
} else if(token_state == TAG || token_state == START_TAG || token_state == START_TAG_CLASS ||
token_state == START_TAG_ANNOTATION) {
/**
* If the tag does not accept an annotation then release the current
* annotation and intialize annotation to a safe empty state
*/
if( !tag_accepts_annotation( &result ) ) {
webvtt_release_string( &annotation );
webvtt_init_string( &annotation );
}
status = webvtt_create_start_token( token, &result, css_classes, &annotation );
} else if( token_state == END_TAG ) {
status = webvtt_create_end_token( token, &result );
} else if( token_state == TIME_STAMP_TAG ) {
parse_timestamp( webvtt_string_text( &result ), &time_stamp );
status = webvtt_create_timestamp_token( token, time_stamp );
} else {
status = WEBVTT_INVALID_TOKEN_STATE;
}
}
webvtt_release_stringlist( &css_classes );
webvtt_release_string( &result );
webvtt_release_string( &annotation );
return status;
}
