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126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/**
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* Copyright (c) 2013 Mozilla Foundation and Contributors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "parser_internal.h"
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#include "cue_internal.h"
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WEBVTT_EXPORT webvtt_status
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webvtt_create_cue( webvtt_cue **pcue )
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{
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webvtt_cue *cue;
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if( !pcue ) {
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return WEBVTT_INVALID_PARAM;
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}
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cue = (webvtt_cue *)webvtt_alloc0( sizeof(*cue) );
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if( !cue ) {
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return WEBVTT_OUT_OF_MEMORY;
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}
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/**
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* From http://dev.w3.org/html5/webvtt/#parsing (10/25/2012)
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*
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* Let cue's text track cue snap-to-lines flag be true.
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*
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* Let cue's text track cue line position be auto.
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*
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* Let cue's text track cue text position be 50.
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*
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* Let cue's text track cue size be 100.
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*
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* Let cue's text track cue alignment be middle alignment.
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*/
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webvtt_ref( &cue->refs );
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webvtt_init_string( &cue->id );
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webvtt_init_string( &cue->body );
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cue->from = 0xFFFFFFFFFFFFFFFF;
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cue->until = 0xFFFFFFFFFFFFFFFF;
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cue->snap_to_lines = 1;
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cue->settings.position = 50;
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cue->settings.size = 100;
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cue->settings.align = WEBVTT_ALIGN_MIDDLE;
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cue->settings.line = WEBVTT_AUTO;
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cue->settings.vertical = WEBVTT_HORIZONTAL;
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*pcue = cue;
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return WEBVTT_SUCCESS;
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}
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WEBVTT_EXPORT void
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webvtt_ref_cue( webvtt_cue *cue )
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{
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if( cue ) {
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webvtt_ref( &cue->refs );
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}
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}
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WEBVTT_EXPORT void
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webvtt_release_cue( webvtt_cue **pcue )
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{
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if( pcue && *pcue ) {
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webvtt_cue *cue = *pcue;
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*pcue = 0;
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if( webvtt_deref( &cue->refs ) == 0 ) {
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webvtt_release_string( &cue->id );
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webvtt_release_string( &cue->body );
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webvtt_release_node( &cue->node_head );
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webvtt_free( cue );
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}
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}
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}
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WEBVTT_EXPORT int
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webvtt_validate_cue( webvtt_cue *cue )
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{
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if( cue ) {
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/**
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* validate cue-times (Can't do checks against previously parsed cuetimes.
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* That's the applications responsibility
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*/
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if( BAD_TIMESTAMP(cue->from) || BAD_TIMESTAMP(cue->until) ) {
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goto error;
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}
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if( cue->until <= cue->from ) {
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goto error;
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}
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/**
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* Don't do any payload validation, because this would involve parsing the
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* payload, which is optional.
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*/
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return 1;
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}
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error:
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return 0;
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}
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WEBVTT_INTERN webvtt_bool
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cue_is_incomplete( const webvtt_cue *cue ) {
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return !cue || ( cue->flags & CUE_HEADER_MASK ) == CUE_HAVE_ID;
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}
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