125 lines
4.7 KiB
C
125 lines
4.7 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_CEA708_H
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#define LIBCAPTION_CEA708_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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#define CEA608_MAX_SIZE (255)
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////////////////////////////////////////////////////////////////////////////////
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typedef enum {
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cc_type_ntsc_cc_field_1 = 0,
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cc_type_ntsc_cc_field_2 = 1,
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cc_type_dtvcc_packet_data = 2,
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cc_type_dtvcc_packet_start = 3,
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} cea708_cc_type_t;
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typedef struct {
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unsigned int marker_bits : 5;
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unsigned int cc_valid : 1;
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unsigned int cc_type : 2; // castable to cea708_cc_type_t
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unsigned int cc_data : 16;
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} cc_data_t;
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typedef struct {
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unsigned int process_em_data_flag : 1;
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unsigned int process_cc_data_flag : 1;
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unsigned int additional_data_flag : 1;
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unsigned int cc_count : 5;
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unsigned int em_data : 8;
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cc_data_t cc_data[32];
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} user_data_t;
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/*! \brief
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\param
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*/
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cc_data_t cea708_encode_cc_data(int cc_valid, cea708_cc_type_t type, uint16_t cc_data);
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/*! \brief
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\param
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*/
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int cea708_cc_count(user_data_t* data);
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/*! \brief
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\param
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*/
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uint16_t cea708_cc_data(user_data_t* data, int index, int* valid, cea708_cc_type_t* type);
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////////////////////////////////////////////////////////////////////////////////
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typedef enum {
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country_united_states = 181,
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} itu_t_t35_country_code_t;
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typedef enum {
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t35_provider_direct_tv = 47,
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t35_provider_atsc = 49,
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} itu_t_t35_provider_code_t;
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typedef struct {
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itu_t_t35_country_code_t country;
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itu_t_t35_provider_code_t provider;
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uint32_t user_identifier;
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uint8_t user_data_type_code;
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uint8_t directv_user_data_length;
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user_data_t user_data;
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double timestamp;
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} cea708_t;
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const static uint32_t GA94 = (('G' << 24) | ('A' << 16) | ('9' << 8) | '4');
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const static uint32_t DTG1 = (('D' << 24) | ('T' << 16) | ('G' << 8) | '1');
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/*! \brief
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\param
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*/
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int cea708_init(cea708_t* cea708, double timestamp); // will confgure using HLS compatiable defaults
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/*! \brief
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\param
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*/
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libcaption_stauts_t cea708_parse_h264(const uint8_t* data, size_t size, cea708_t* cea708);
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/*! \brief
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\param
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*/
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libcaption_stauts_t cea708_parse_h262(const uint8_t* data, size_t size, cea708_t* cea708);
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/*! \brief
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\param
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*/
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libcaption_stauts_t cea708_to_caption_frame(caption_frame_t* frame, cea708_t* cea708);
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/*! \brief
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\param
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*/
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int cea708_add_cc_data(cea708_t* cea708, int valid, cea708_cc_type_t type, uint16_t cc_data);
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/*! \brief
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\param
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*/
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int cea708_render(cea708_t* cea708, uint8_t* data, size_t size);
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/*! \brief
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\param
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*/
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void cea708_dump(cea708_t* cea708);
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#ifdef __cplusplus
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}
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#endif
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#endif
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