90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
// Copyright 2020 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef PACKAGER_MEDIA_FORMATS_MP2T_ES_PARSER_TELETEXT_H_
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#define PACKAGER_MEDIA_FORMATS_MP2T_ES_PARSER_TELETEXT_H_
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#include <cstdint>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include <packager/media/base/text_stream_info.h>
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#include <packager/media/formats/mp2t/es_parser.h>
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namespace shaka {
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namespace media {
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namespace mp2t {
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class EsParserTeletext : public EsParser {
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public:
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EsParserTeletext(const uint32_t pid,
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const NewStreamInfoCB& new_stream_info_cb,
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const EmitTextSampleCB& emit_sample_cb,
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const uint8_t* descriptor,
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const size_t descriptor_length);
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EsParserTeletext(const EsParserTeletext&) = delete;
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EsParserTeletext& operator=(const EsParserTeletext&) = delete;
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bool Parse(const uint8_t* buf, int size, int64_t pts, int64_t dts) override;
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bool Flush() override;
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void Reset() override;
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private:
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using RowColReplacementMap =
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std::unordered_map<uint8_t, std::unordered_map<uint8_t, std::string>>;
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struct TextRow {
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TextAlignment alignment;
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int row_number;
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bool double_height;
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TextFragment fragment;
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};
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struct TextBlock {
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std::vector<TextRow> rows;
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RowColReplacementMap packet_26_replacements;
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int64_t pts;
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};
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bool ParseInternal(const uint8_t* data, const size_t size, const int64_t pts);
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bool ParseDataBlock(const int64_t pts,
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const uint8_t* data_block,
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const uint8_t packet_nr,
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const uint8_t magazine,
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TextRow& display_text);
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void UpdateCharset();
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void SendPending(const uint16_t index, const int64_t pts);
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TextRow BuildRow(const uint8_t* data_block, const uint8_t row) const;
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void ParsePacket26(const uint8_t* data_block);
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void UpdateNationalSubset(const uint8_t national_subset[13][3]);
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static void SetPacket26ReplacementString(
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RowColReplacementMap& replacement_map,
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const uint8_t row,
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const uint8_t column,
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std::string&& replacement_string);
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NewStreamInfoCB new_stream_info_cb_;
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EmitTextSampleCB emit_sample_cb_;
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std::unordered_map<uint16_t, std::string> languages_;
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bool sent_info_ = false;
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uint8_t magazine_;
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uint8_t page_number_;
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std::unordered_map<uint16_t, TextBlock> page_state_;
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uint8_t charset_code_;
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char current_charset_[96][3];
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int64_t last_pts_;
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};
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} // namespace mp2t
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} // namespace media
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} // namespace shaka
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#endif // PACKAGER_MEDIA_FORMATS_MP2T_ES_PARSER_TELETEXT_H_
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