207 lines
8.2 KiB
C
207 lines
8.2 KiB
C
/**********************************************************************************************/
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/* The MIT License */
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/* */
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/* Copyright 2016-2016 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_EIA608_H
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#define LIBCAPTION_EIA608_H
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#include "utf8.h"
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#include "eia608_charmap.h"
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////////////////////////////////////////////////////////////////////////////////
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// Parity
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#define EIA608_BX(B,X) (((B)>>X)&0x01)
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#define EIA608_BP(B) ((B)&0x7F) | ((EIA608_BX((B),0)^EIA608_BX(B,1)^EIA608_BX((B),2)^EIA608_BX((B),3)^EIA608_BX((B),4)^EIA608_BX((B),5)^EIA608_BX((B),6)^(0x01))<<7)
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#define EIA608_B2(B) EIA608_BP((B)+0), EIA608_BP((B)+1), EIA608_BP((B)+2), EIA608_BP((B)+3), EIA608_BP((B)+4), EIA608_BP((B)+5), EIA608_BP((B)+6), EIA608_BP((B)+7)
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#define EIA608_B1(B) EIA608_B2((B)+0), EIA608_B2((B)+8), EIA608_B2((B)+16), EIA608_B2((B)+24), EIA608_B2((B)+32), EIA608_B2((B)+40), EIA608_B2((B)+48), EIA608_B2((B)+56)
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static const uint8_t eia608_parity_table[] = { EIA608_B1 (0), EIA608_B1 (64) };
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extern const char* eia608_mode_map[];
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extern const char* eia608_style_map[];
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#ifdef _MSC_VER
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#ifndef inline
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#define inline __inline
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#endif
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#endif
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/*! \brief
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\param
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*/
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static inline uint8_t eia608_parity_byte (uint8_t cc_data) { return eia608_parity_table[0x7F & cc_data]; }
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/*! \brief
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\param
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*/
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static inline uint16_t eia608_parity_word (uint16_t cc_data) { return (uint16_t) ( (eia608_parity_byte ( (uint8_t) (cc_data>>8)) <<8) | eia608_parity_byte ( (uint8_t) cc_data)); }
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/*! \brief
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\param
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*/
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static inline uint16_t eia608_parity (uint16_t cc_data) { return eia608_parity_word (cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_parity_varify (uint16_t cc_data) { return eia608_parity_word (cc_data) == cc_data ? 1 : 0; }
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/*! \brief
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\param
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*/
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static inline int eia608_parity_strip (uint16_t cc_data) { return cc_data & 0x7F7F; }
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/*! \brief
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\param
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*/
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static inline int eia608_test_second_channel_bit (uint16_t cc_data) { return (cc_data & 0x0800); }
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////////////////////////////////////////////////////////////////////////////////
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// cc_data types
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/*! \brief
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\param
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*/
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static inline int eia608_is_basicna (uint16_t cc_data) { return 0x0000 != (0x6000 & cc_data); /*&& 0x1F00 < (0x7F00 & cc_data);*/ }
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/*! \brief
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\param
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*/
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static inline int eia608_is_preamble (uint16_t cc_data) { return 0x1040 == (0x7040 & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_midrowchange (uint16_t cc_data) { return 0x1120 == (0x7770 & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_specialna (uint16_t cc_data) { return 0x1130 == (0x7770 & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_xds (uint16_t cc_data) { return 0x0000 == (0x7070 & cc_data) && 0x0000 != (0x0F0F & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_westeu (uint16_t cc_data) { return 0x1220 == (0x7660 & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_control (uint16_t cc_data) { return 0x1420 == (0x7670 & cc_data) || 0x1720 == (0x7770 & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_norpak (uint16_t cc_data) { return 0x1724 == (0x777C & cc_data) || 0x1728 == (0x777C & cc_data); }
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/*! \brief
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\param
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*/
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static inline int eia608_is_padding (uint16_t cc_data) { return 0x8080 == cc_data; }
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////////////////////////////////////////////////////////////////////////////////
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// preamble
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typedef enum {
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eia608_style_white = 0,
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eia608_style_green = 1,
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eia608_style_blue = 2,
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eia608_style_cyan = 3,
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eia608_style_red = 4,
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eia608_style_yellow = 5,
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eia608_style_magenta = 6,
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eia608_style_italics = 7,
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} eia608_style_t;
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/*! \brief
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\param
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*/
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int eia608_parse_preamble (uint16_t cc_data, int* row, int* col, eia608_style_t* style, int* chan, int* underline);
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/*! \brief
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\param
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*/
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int eia608_parse_midrowchange (uint16_t cc_data, int* chan, eia608_style_t* style, int* underline);
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/*! \brief
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\param
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*/
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uint16_t eia608_row_column_pramble (int row, int col, int chan, int underline);
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/*! \brief
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\param
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*/
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uint16_t eia608_row_style_pramble (int row, eia608_style_t style, int chan, int underline);
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////////////////////////////////////////////////////////////////////////////////
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// control command
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typedef enum { // yes, no?
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eia608_tab_offset_0 = 0x1720,
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eia608_tab_offset_1 = 0x1721,
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eia608_tab_offset_2 = 0x1722,
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eia608_tab_offset_3 = 0x1723,
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eia608_control_resume_caption_loading = 0x1420,
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eia608_control_backspace = 0x1421,
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eia608_control_alarm_off = 0x1422,
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eia608_control_alarm_on = 0x1423,
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eia608_control_delete_to_end_of_row = 0x1424,
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eia608_control_roll_up_2 = 0x1425,
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eia608_control_roll_up_3 = 0x1426,
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eia608_control_roll_up_4 = 0x1427,
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eia608_control_resume_direct_captioning = 0x1429,
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eia608_control_text_restart = 0x142A,
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eia608_control_text_resume_text_display = 0x142B,
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eia608_control_erase_display_memory = 0x142C,
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eia608_control_carriage_return = 0x142D,
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eia608_control_erase_non_displayed_memory = 0x142E,
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eia608_control_end_of_caption = 0x142F,
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} eia608_control_t;
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#define eia608_control_popon eia608_control_resume_caption_loading
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#define eia608_control_painton eia608_control_resume_direct_captioning
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/*! \brief
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\param
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*/
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uint16_t eia608_control_command (eia608_control_t cmd, int cc);
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/*! \brief
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\param
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*/
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static inline uint16_t eia608_tab (int size, int cc) { return eia608_control_command ( (eia608_control_t) (eia608_tab_offset_0 | (size&0x0F)),cc); }
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/*! \brief
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\param
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*/
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eia608_control_t eia608_parse_control (uint16_t cc_data, int* cc);
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////////////////////////////////////////////////////////////////////////////////
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// text
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/*! \brief
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\param c
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*/
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uint16_t eia608_from_utf8_1 (const utf8_char_t* c, int chan);
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/*! \brief
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\param
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*/
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uint16_t eia608_from_utf8_2 (const utf8_char_t* c1, const utf8_char_t* c2);
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/*! \brief
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\param
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*/
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uint16_t eia608_from_basicna (uint16_t bna1, uint16_t bna2);
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/*! \brief
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\param
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*/
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int eia608_to_utf8 (uint16_t c, int* chan, utf8_char_t* char1, utf8_char_t* char2);
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////////////////////////////////////////////////////////////////////////////////
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/*! \brief
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\param
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*/
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void eia608_dump (uint16_t cc_data);
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////////////////////////////////////////////////////////////////////////////////
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#endif
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