muxer.hxx

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/*
 * Copyright (C) 2024-2026 David C. Manuelda (StormBytePP)
 *
 * This file is part of StormByte-Multimedia.
 *
 * StormByte-Multimedia original source is dual-licensed:
 *
 * 1. GNU Lesser General Public License v3.0 (or later)
 *    You may redistribute and/or modify this file under the terms of the
 *    GNU Lesser General Public License as published by the Free Software
 *    Foundation, either version 3 of the License, or (at your option)
 *    any later version.
 *
 * 2. Commercial license
 *    Alternatively, this file may be used under the terms of a commercial
 *    license agreement with the copyright holder
 *    (David C. Manuelda <StormByte@gmail.com>).
 *
 * Both licenses apply only to original StormByte-Multimedia source in this
 * file. Third-party components — including FFmpeg and embedded trained data —
 * remain under their own licenses and are not covered by the commercial grant.
 *
 * Neither license grants any patent rights. Any patent licenses required
 * to use this software or third-party components must be obtained separately
 * from the patent holders.
 *
 * StormByte-Multimedia is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with StormByte-Multimedia. If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.html>.
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-StormByte-Commercial
 */
 
#pragma once
 
#include <StormByte/logger/log.hxx>
#include <StormByte/multimedia/container.hxx>
#include <StormByte/multimedia/file.hxx>
#include <StormByte/multimedia/pipeline/progress.hxx>
#include <StormByte/multimedia/pipeline/step.hxx>
#include <StormByte/multimedia/property/duration.hxx>
#include <StormByte/multimedia/visibility.h>
 
#include <atomic>
#include <cstddef>
#include <cstdint>
#include <filesystem>
#include <map>
#include <memory>
#include <optional>
#include <string>

namespace StormByte::Multimedia::Backend::Pipeline {
    class Muxer;    
}
 
namespace StormByte::Multimedia::Backend::Pipeline::Detail::Worker {
    class Mux;
}

namespace StormByte::Multimedia::Backend::Pipeline::Detail::Muxer::Matroska {
    class Container;    
}

namespace StormByte::Multimedia::Pipeline {
    class Demuxer;
    class Encoder;
    class Muxer;
    class Remuxer;

    STORMBYTE_MULTIMEDIA_PUBLIC Encoder& operator>>(Encoder& encoder, Muxer& muxer) noexcept;

    STORMBYTE_MULTIMEDIA_PUBLIC Remuxer& operator>>(Remuxer& remuxer, Muxer& muxer) noexcept;

    STORMBYTE_MULTIMEDIA_PUBLIC Muxer& operator>>(Muxer& muxer, const std::filesystem::path& path) noexcept;

    STORMBYTE_MULTIMEDIA_PUBLIC Muxer& operator>>(const File& file, Muxer& muxer) noexcept;

    STORMBYTE_MULTIMEDIA_PUBLIC Muxer& operator>>(Demuxer& demuxer, Muxer& muxer) noexcept;

    class STORMBYTE_MULTIMEDIA_PUBLIC Muxer final: public Step {
        friend class Backend::Pipeline::Detail::Muxer::Matroska::Container;
        friend class Backend::Pipeline::Muxer;
        friend class Backend::Pipeline::Detail::Worker::Mux;
        friend Encoder& operator>>(Encoder& encoder, Muxer& muxer) noexcept;
        friend Muxer& operator>>(const File& file, Muxer& muxer) noexcept;
        friend Muxer& operator>>(Demuxer& demuxer, Muxer& muxer) noexcept;
        friend Muxer& operator>>(Muxer& muxer, const std::filesystem::path& path) noexcept;
        friend Remuxer& operator>>(Remuxer& remuxer, Muxer& muxer) noexcept;
 
        public:

            explicit Muxer(std::shared_ptr<StormByte::Logger::Log> log,
                const Container& container) noexcept;

            Muxer(const Muxer& other) = delete;

            Muxer(Muxer&& other) noexcept = delete;

            ~Muxer() noexcept override;

            Muxer& operator=(const Muxer& other) = delete;

            Muxer& operator=(Muxer&& other) noexcept = delete;


            explicit operator bool() const noexcept;

            bool Closed() const noexcept;

            std::optional<Property::Duration> Position() const noexcept;

            const Container& Destination() const noexcept;

            bool Armed() const noexcept;

            bool Ready() const noexcept override;

            std::size_t InputCeiling() const noexcept override;


            std::optional<std::string> Language(int output_index) const noexcept;

            void Language(int output_index, std::string language) noexcept;

            std::optional<std::string> Title(int output_index) const noexcept;

            void Title(int output_index, std::string title) noexcept;

 
        private:
            using Step::Log;

            void WaitArmed() noexcept;

            bool BindEncoderStream(Encoder& encoder, void* avStream) noexcept;

            bool RemuxCodec(int inIndex, void*& params, void* timeBase) noexcept;

            std::size_t ExpectedSlots() const noexcept;

            void ClockMuxDone() noexcept;

            void ClockPass(std::int64_t ns) noexcept;
 
            const Container* m_container;                                   
            std::unique_ptr<Backend::Pipeline::Muxer> m_backend;            
            Demuxer* m_origin;                                              
            std::shared_ptr<class Progress> m_progress;                     
            std::map<int, std::string> m_language;                          
            std::map<int, std::string> m_title;                             
            std::atomic<bool> m_closed;                                     
            std::atomic<std::size_t> m_reserved;
            std::atomic<std::int64_t> m_positionNs;                         
            Join m_join{*this};                                             
    };
}