AMC/zwsUML.txt at main · paulSchaefer03/AMC · GitHub

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@startuml
autonumber

skinparam ParticipantPadding 20
skinparam BoxPadding 10

box "User 1 (Initiator/Sender)" #lightblue
    participant "Player" as U1Player
    participant "MediaSource" as U1MediaSource
    participant "BufferQueue" as U1BufferQueue
    participant "SourceBuffer" as U1SourceBuffer
    participant "ffmpeg.wasm" as U1FFmpeg
    database "Speicher" as U1Speicher
    database "Cache" as U1Cache
end box

box "User 2 (Receiver)" #lightgreen
    participant "Player" as U2Player
    participant "MediaSource" as U2MediaSource
    participant "BufferQueue" as U2BufferQueue
    participant "SourceBuffer" as U2SourceBuffer
end box

box "User 3 (Receiver)" #lightyellow
    participant "Player" as U3Player
    participant "MediaSource" as U3MediaSource
    participant "BufferQueue" as U3BufferQueue
    participant "SourceBuffer" as U3SourceBuffer
end box


group Start Chunks and Headers Generation
    U1Player -> U1FFmpeg : Load Video File
    U1Player -> U1FFmpeg : Generate Chunks + Headers
    U1FFmpeg -> U1Speicher : Write Chunks (000.webm ...) + Headers
    U1FFmpeg -> U1Player : Chunks + Headers Ready
end

group Reset MediaSources
    U1Player -> U1MediaSource : Reset MediaSource
    U1Player -> U2Player : Send Reset Request
    U1Player -> U3Player : Send Reset Request

    U2Player -> U2MediaSource : Reset MediaSource
    U3Player -> U3MediaSource : Reset MediaSource

    U2MediaSource -> U2Player : MediaSource Reset Done
    U3MediaSource -> U3Player : MediaSource Reset Done

    U2Player -> U1Player : Acknowledge Reset Complete
    U3Player -> U1Player : Acknowledge Reset Complete

    U1MediaSource -> U1Player : MediaSource Reset Done
end

group MainHeader Loading
    U1Player -> U1Speicher : Read MainHeader File
    U1Speicher -> U1Cache : Load MainHeader into Cache
    U1Player -> U1BufferQueue : Send MainHeader
    U1BufferQueue -> U1SourceBuffer : Append MainHeader
    U1SourceBuffer -> U1MediaSource : Attach MainHeader
    U1Player -> U2Player : Send MainHeader
    U1Player -> U3Player : Send MainHeader

    U2Player -> U2BufferQueue : Add MainHeader to Queue
    U2BufferQueue -> U2SourceBuffer : Append MainHeader
    U2SourceBuffer -> U2MediaSource : Attach MainHeader

    U3Player -> U3BufferQueue : Add MainHeader to Queue
    U3BufferQueue -> U3SourceBuffer : Append MainHeader
    U3SourceBuffer -> U3MediaSource : Attach MainHeader
end

par "Parallel Execution"
    group Video Chunk Streaming
        loop While SourceBuffer < 5 Chunks
            note right of U1Player : Check SourceBuffer count
            group Chunk Header
                U1Player -> U1Speicher : Read Header of Chunk_n
                U1Speicher -> U1Cache : Load Chunk_n Header into Cache
                U1Player -> U1BufferQueue : Send Chunk_n Header
                U1BufferQueue -> U1SourceBuffer : Append Chunk_n Header
                U1SourceBuffer -> U1MediaSource : Attach Chunk_n Header

                U1Player -> U2Player : Send Chunk_n Header
                U2Player -> U2BufferQueue : Add Header to Queue
                U2BufferQueue -> U2SourceBuffer : Append Header
                U2SourceBuffer -> U2MediaSource : Attach Header

                U1Player -> U3Player : Send Chunk_n Header
                U3Player -> U3BufferQueue : Add Header to Queue
                U3BufferQueue -> U3SourceBuffer : Append Header
                U3SourceBuffer -> U3MediaSource : Attach Header
            end

            group Video Chunk Transmission (Chunk_n)
                U1Player -> U1Speicher : Load Video Chunk_n
                U1Speicher -> U1Cache : Load into Cache

                loop Until Chunk_n is fully sent
                    U1Cache -> U1Player : Fetch smaller chunks of Chunk_n
                    U1Player -> U1BufferQueue : Send smaller Chunk_i
                    U1BufferQueue -> U1SourceBuffer : Append smaller Chunk_i
                    U1SourceBuffer -> U1MediaSource : Attach smaller Chunk_i

                    U1Player -> U2Player : Send smaller Chunk_i
                    U2Player -> U2BufferQueue : Add smaller Chunk_i to Queue
                    U2BufferQueue -> U2SourceBuffer : Append smaller Chunk_i
                    U2SourceBuffer -> U2MediaSource : Attach smaller Chunk_i

                    U1Player -> U3Player : Send smaller Chunk_i
                    U3Player -> U3BufferQueue : Add smaller Chunk_i to Queue
                    U3BufferQueue -> U3SourceBuffer : Append smaller Chunk_i
                    U3SourceBuffer -> U3MediaSource : Attach smaller Chunk_i
                end
            end
        end
        note right of U1Player : Pausing transmission until buffer frees space
    end

    group Playback and Buffer Cleanup
        group Player Start Playback
            U1Player -> U2Player : Synchronize Start
            U1Player -> U3Player : Synchronize Start
        end

        loop While Playing
            note right of U1Player : Check currentTime >= Chunk_1.end
            U1Player -> U1BufferQueue : Remove Chunk_0
            U1BufferQueue -> U1SourceBuffer : Detach Chunk_0

            U2Player -> U2BufferQueue : Remove Chunk_0
            U2BufferQueue -> U2SourceBuffer : Detach Chunk_0

            U3Player -> U3BufferQueue : Remove Chunk_0
            U3BufferQueue -> U3SourceBuffer : Detach Chunk_0
        end
    end
end

@enduml