edde746
2563d624ca
With Audio Passthrough on, every (E-)AC-3 track on Apple TV dropped 100-220ms of audio every 1.79s. The system pipeline behind the compressed AVPlayer path reads unboundedly far ahead of the playhead and consumes its buffer in fixed ~1.8s quanta; the AO's 2s feed lead meant each refill overran the write head and the renderer skipped the missing audio to stay on clock. Bitrate- and route-independent, and invisible to the AO: item status, time control, and the feed margin all stayed clean while the sink output gapped (#1300, #1776). MPVKit 1.0.25 feeds the elementary stream 8s ahead of the observed playhead -- 4x the pipeline's refill quantum -- sizes the ES window from the configured lead, exposes it as --ao-avfoundation-compressed-lead, and keeps waiting during preroll while a slow source (a realtime-pinned server transcode) is still making priming progress instead of abandoning Atmos for PCM. Verified on an Apple TV 4K gen 3 with an HDMI audio capture rig against EAC3 768k and 640k streams: 21 dropouts/min on 2.15.0, zero across 10.7 minutes with the new lead; a 997Hz sine encoded as EAC3 through the full passthrough path is statistically identical to first-party AVKit playback of the same tone; a rate-limited server at 0.95x realtime now prerolls late on the compressed path instead of downgrading, and once the lead is filled mpv's cache pauses absorb the deficit with the margin intact.
87 lines
3.6 KiB
Ruby
Executable File
87 lines
3.6 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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# Adds the Plezy MpvPlayer Swift sources and the MPVKit Swift Package
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# dependency to tvos/Runner.xcodeproj so it matches the iOS project's
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# linkage. Idempotent: re-running skips already-added entries.
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require 'xcodeproj'
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PROJECT_PATH = File.expand_path('../Runner.xcodeproj', __dir__)
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project = Xcodeproj::Project.open(PROJECT_PATH)
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runner_target = project.targets.find { |t| t.name == 'Runner' }
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raise "Runner target not found" unless runner_target
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# Find or create the MpvPlayer group under Runner.
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main_group = project.main_group['Runner']
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raise "Runner group not found" unless main_group
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mpv_group = main_group['MpvPlayer'] || main_group.new_group('MpvPlayer', 'Runner/MpvPlayer')
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# File references.
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# path is relative to the group's path (Runner/MpvPlayer → ../..).
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# For files elsewhere in the repo, use SOURCE_ROOT with the absolute-ish path.
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sources = [
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{ name: 'MpvPlayerCoreBase.swift', path: '../shared/apple/MpvPlayer/MpvPlayerCoreBase.swift', tree: '<source_root>' },
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{ name: 'MpvPlayerPluginShared.swift', path: '../shared/apple/MpvPlayer/MpvPlayerPluginShared.swift', tree: '<source_root>' },
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{ name: 'MpvPlayerCore.swift', path: '../ios/Runner/MpvPlayer/MpvPlayerCore.swift', tree: '<source_root>' },
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{ name: 'MpvPlayerPlugin.swift', path: '../ios/Runner/MpvPlayer/MpvPlayerPlugin.swift', tree: '<source_root>' },
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{ name: 'MpvPipController.swift', path: '../ios/Runner/MpvPlayer/MpvPipController.swift', tree: '<source_root>' },
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{ name: 'MpvAudioPlayerCore.swift', path: '../shared/apple/MpvPlayer/MpvAudioPlayerCore.swift', tree: '<source_root>' },
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{ name: 'MpvAudioPlayerPlugin.swift', path: '../shared/apple/MpvPlayer/MpvAudioPlayerPlugin.swift', tree: '<source_root>' },
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]
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sources_phase = runner_target.source_build_phase
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sources.each do |src|
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ref = mpv_group.files.find { |file| file.display_name == src[:name] }
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unless ref
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ref = mpv_group.new_file(src[:path])
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ref.name = src[:name]
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ref.source_tree = src[:tree]
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puts "[add ] #{src[:name]} reference"
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end
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if sources_phase.files_references.include?(ref)
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puts "[skip] #{src[:name]} source membership already present"
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else
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sources_phase.add_file_reference(ref, true)
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puts "[add ] #{src[:name]} source membership"
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end
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end
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# Swift Package: MPVKit. Restore each graph edge independently so a project
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# with a surviving package reference cannot silently omit the Runner linkage.
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pkg_url = 'https://github.com/edde746/MPVKit'
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pkg_version = '1.0.25'
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pkg = project.root_object.package_references.find do |candidate|
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candidate.repositoryURL == pkg_url rescue false
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end
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unless pkg
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pkg = project.new(Xcodeproj::Project::Object::XCRemoteSwiftPackageReference)
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pkg.repositoryURL = pkg_url
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project.root_object.package_references << pkg
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puts "[add ] MPVKit SPM package reference"
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end
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pkg.requirement = { 'kind' => 'exactVersion', 'version' => pkg_version }
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puts "[set ] MPVKit SPM package version"
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product = runner_target.package_product_dependencies.find do |candidate|
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candidate.product_name == 'MPVKit'
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end
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unless product
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product = project.new(Xcodeproj::Project::Object::XCSwiftPackageProductDependency)
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product.product_name = 'MPVKit'
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runner_target.package_product_dependencies << product
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puts "[add ] MPVKit Runner product dependency"
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end
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product.package = pkg
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frameworks_phase = runner_target.frameworks_build_phase
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unless frameworks_phase.files.any? { |build_file| build_file.product_ref == product }
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build_file = project.new(Xcodeproj::Project::Object::PBXBuildFile)
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build_file.product_ref = product
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frameworks_phase.files << build_file
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puts "[add ] MPVKit framework linkage"
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end
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project.save
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puts "Saved #{PROJECT_PATH}"
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