146 lines
4.6 KiB
C
146 lines
4.6 KiB
C
/**********************************************************************************************/
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/* The MIT License */
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/* */
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/* Copyright 2016-2017 Twitch Interactive, Inc. or its affiliates. All Rights Reserved. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining a copy */
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/* of this software and associated documentation files (the "Software"), to deal */
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/* in the Software without restriction, including without limitation the rights */
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/* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell */
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/* copies of the Software, and to permit persons to whom the Software is */
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/* furnished to do so, subject to the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be included in */
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/* all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
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/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
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/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
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/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
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/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
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/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN */
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/* THE SOFTWARE. */
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/**********************************************************************************************/
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#ifndef LIBCAPTION_VTT_H
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#define LIBCAPTION_VTT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "caption.h"
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#include "eia608.h"
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enum VTT_BLOCK_TYPE {
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VTT_REGION = 0,
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VTT_STYLE = 1,
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VTT_NOTE = 2,
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VTT_CUE = 3
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};
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// CUE represents a block of caption text
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typedef struct _vtt_block_t {
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struct _vtt_block_t* next;
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enum VTT_BLOCK_TYPE type;
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// CUE-Only
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double timestamp;
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double duration; // -1.0 for no duration
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char* cue_settings;
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char* cue_id;
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// Standard block data
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size_t text_size;
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char* block_text;
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} vtt_block_t;
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// VTT files are a collection of REGION, STYLE and CUE blocks.
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// XXX: Comments (NOTE blocks) are ignored
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typedef struct _vtt_t {
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vtt_block_t* region_head;
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vtt_block_t* region_tail;
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vtt_block_t* style_head;
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vtt_block_t* style_tail;
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vtt_block_t* cue_head;
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vtt_block_t* cue_tail;
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} vtt_t;
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/*! \brief
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\param
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*/
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vtt_t* vtt_new();
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/*! \brief
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\param
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*/
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void vtt_free(vtt_t* vtt);
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/*! \brief
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\param
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*/
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vtt_block_t* vtt_block_new(vtt_t* vtt, const utf8_char_t* data, size_t size, enum VTT_BLOCK_TYPE type);
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/*! \brief
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\param
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*/
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void vtt_cue_free_head(vtt_t* vtt);
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/*! \brief
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\param
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*/
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void vtt_style_free_head(vtt_t* vtt);
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/*! \brief
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\param
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*/
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void vtt_region_free_head(vtt_t* vtt);
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// returns a vtt_t, containing linked lists of blocks. must be freed when done
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/*! \brief
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\param
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*/
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vtt_t* vtt_parse(const utf8_char_t* data, size_t size);
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/*! \brief
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\param
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*/
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vtt_t* _vtt_parse(const utf8_char_t* data, size_t size, int srt_mode);
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/*! \brief
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\param
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*/
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static inline vtt_block_t* vtt_cue_next(vtt_block_t* block) { return block->next; }
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/*! \brief
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\param
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*/
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static inline utf8_char_t* vtt_block_data(vtt_block_t* block) { return (utf8_char_t*)(block) + sizeof(vtt_block_t); }
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/*! \brief
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\param
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*/
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static inline void vtt_crack_time(double tt, int* hh, int* mm, int* ss, int* ms)
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{
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(*ms) = (int)((int64_t)(tt * 1000) % 1000);
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(*ss) = (int)((int64_t)(tt) % 60);
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(*mm) = (int)((int64_t)(tt / (60)) % 60);
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(*hh) = (int)((int64_t)(tt / (60 * 60)));
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}
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// This only converts the current CUE, it does not walk the list
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/*! \brief
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\param
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*/
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int vtt_cue_to_caption_frame(vtt_block_t* cue, caption_frame_t* frame);
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// returns the new cue
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/*! \brief
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\param
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*/
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vtt_block_t* vtt_cue_from_caption_frame(caption_frame_t* frame, vtt_t* vtt);
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/*! \brief
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\param
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*/
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void vtt_dump(vtt_t* vtt);
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#ifdef __cplusplus
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}
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#endif
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#endif
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