/**********************************************************************************************/ /* The MIT License */ /* */ /* Copyright 2016-2017 Twitch Interactive, Inc. or its affiliates. All Rights Reserved. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining a copy */ /* of this software and associated documentation files (the "Software"), to deal */ /* in the Software without restriction, including without limitation the rights */ /* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell */ /* copies of the Software, and to permit persons to whom the Software is */ /* furnished to do so, subject to the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be included in */ /* all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */ /* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */ /* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */ /* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */ /* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */ /* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN */ /* THE SOFTWARE. */ /**********************************************************************************************/ #ifndef LIBCAPTION_EIA608_H #define LIBCAPTION_EIA608_H #ifdef __cplusplus extern "C" { #endif #include #include "eia608_charmap.h" #include "utf8.h" //////////////////////////////////////////////////////////////////////////////// // Parity #define EIA608_BX(B, X) (((B) << (X)) & 0x80) #define EIA608_BP(B) ((B)&0x7F) | (0x80 ^ EIA608_BX((B), 1) ^ EIA608_BX((B), 2) ^ EIA608_BX((B), 3) ^ EIA608_BX((B), 4) ^ EIA608_BX((B), 5) ^ EIA608_BX((B), 6) ^ EIA608_BX((B), 7)) #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) #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) static const uint8_t eia608_parity_table[] = { EIA608_B1(0), EIA608_B1(64) }; extern const char* eia608_style_map[]; #ifdef _MSC_VER #ifndef inline #define inline __inline #endif // ssize_t is POSIX and does not exist on Windows #if defined(_WIN64) typedef signed long ssize_t; #else typedef signed int ssize_t; #endif #endif /*! \brief \param */ static inline uint8_t eia608_parity_byte(uint8_t cc_data) { return eia608_parity_table[0x7F & cc_data]; } /*! \brief \param */ 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)); } /*! \brief \param */ static inline uint16_t eia608_parity(uint16_t cc_data) { return eia608_parity_word(cc_data); } /*! \brief \param */ static inline int eia608_parity_varify(uint16_t cc_data) { return eia608_parity_word(cc_data) == cc_data ? 1 : 0; } /*! \brief \param */ static inline int eia608_parity_strip(uint16_t cc_data) { return cc_data & 0x7F7F; } /*! \brief \param */ static inline int eia608_test_second_channel_bit(uint16_t cc_data) { return (cc_data & 0x0800); } //////////////////////////////////////////////////////////////////////////////// // cc_data types /*! \brief \param */ static inline int eia608_is_basicna(uint16_t cc_data) { return 0x0000 != (0x6000 & cc_data); /*&& 0x1F00 < (0x7F00 & cc_data);*/ } /*! \brief \param */ static inline int eia608_is_preamble(uint16_t cc_data) { return 0x1040 == (0x7040 & cc_data); } /*! \brief \param */ static inline int eia608_is_midrowchange(uint16_t cc_data) { return 0x1120 == (0x7770 & cc_data); } /*! \brief \param */ static inline int eia608_is_specialna(uint16_t cc_data) { return 0x1130 == (0x7770 & cc_data); } /*! \brief \param */ static inline int eia608_is_xds(uint16_t cc_data) { return 0x0000 == (0x7070 & cc_data) && 0x0000 != (0x0F0F & cc_data); } /*! \brief \param */ static inline int eia608_is_westeu(uint16_t cc_data) { return 0x1220 == (0x7660 & cc_data); } /*! \brief \param */ static inline int eia608_is_control(uint16_t cc_data) { return 0x1420 == (0x7670 & cc_data) || 0x1720 == (0x7770 & cc_data); } /*! \brief \param */ static inline int eia608_is_norpak(uint16_t cc_data) { return 0x1724 == (0x777C & cc_data) || 0x1728 == (0x777C & cc_data); } /*! \brief \param */ static inline int eia608_is_padding(uint16_t cc_data) { return 0x8080 == cc_data; } //////////////////////////////////////////////////////////////////////////////// // preamble typedef enum { eia608_style_white = 0, eia608_style_green = 1, eia608_style_blue = 2, eia608_style_cyan = 3, eia608_style_red = 4, eia608_style_yellow = 5, eia608_style_magenta = 6, eia608_style_italics = 7, } eia608_style_t; /*! \brief \param */ int eia608_parse_preamble(uint16_t cc_data, int* row, int* col, eia608_style_t* style, int* chan, int* underline); /*! \brief \param */ int eia608_parse_midrowchange(uint16_t cc_data, int* chan, eia608_style_t* style, int* underline); /*! \brief \param */ uint16_t eia608_row_column_pramble(int row, int col, int chan, int underline); /*! \brief \param */ uint16_t eia608_row_style_pramble(int row, int chan, eia608_style_t style, int underline); /*! \brief \param */ uint16_t eia608_midrow_change(int chan, eia608_style_t style, int underline); //////////////////////////////////////////////////////////////////////////////// // control command typedef enum { eia608_tab_offset_0 = 0x1720, eia608_tab_offset_1 = 0x1721, eia608_tab_offset_2 = 0x1722, eia608_tab_offset_3 = 0x1723, eia608_control_resume_caption_loading = 0x1420, eia608_control_backspace = 0x1421, eia608_control_alarm_off = 0x1422, eia608_control_alarm_on = 0x1423, eia608_control_delete_to_end_of_row = 0x1424, eia608_control_roll_up_2 = 0x1425, eia608_control_roll_up_3 = 0x1426, eia608_control_roll_up_4 = 0x1427, eia608_control_resume_direct_captioning = 0x1429, eia608_control_text_restart = 0x142A, eia608_control_text_resume_text_display = 0x142B, eia608_control_erase_display_memory = 0x142C, eia608_control_carriage_return = 0x142D, eia608_control_erase_non_displayed_memory = 0x142E, eia608_control_end_of_caption = 0x142F, } eia608_control_t; /*! \brief \param */ uint16_t eia608_control_command(eia608_control_t cmd, int cc); /*! \brief \param */ static inline uint16_t eia608_tab(int size, int cc) { return eia608_control_command((eia608_control_t)(eia608_tab_offset_0 | (size & 0x0F)), cc); } /*! \brief \param */ eia608_control_t eia608_parse_control(uint16_t cc_data, int* cc); //////////////////////////////////////////////////////////////////////////////// // text /*! \brief \param c */ uint16_t eia608_from_utf8_1(const utf8_char_t* c, int chan); /*! \brief \param */ uint16_t eia608_from_utf8_2(const utf8_char_t* c1, const utf8_char_t* c2); /*! \brief \param */ uint16_t eia608_from_basicna(uint16_t bna1, uint16_t bna2); /*! \brief \param */ int eia608_to_utf8(uint16_t c, int* chan, utf8_char_t* char1, utf8_char_t* char2); //////////////////////////////////////////////////////////////////////////////// /*! \brief \param */ void eia608_dump(uint16_t cc_data); /*! \brief \param */ int eia608_to_text (char *buf, ssize_t size, uint16_t cc_data); //////////////////////////////////////////////////////////////////////////////// #ifdef __cplusplus } #endif #endif