fix(tvos): make EAC3 playback conform to Dolby's guidance
Groundwork for #1300. Establishes the session, buffering and route handling Dolby's application guide prescribes, and adds the diagnostic arm needed to find out whether Apple's sample-buffer renderer can carry Atmos objects at all. Audio session, per the guide's sequence: - Adopt the long-form playback profile in one atomic call at app launch and activate the session there. The SDK only accepts that policy with category Playback, a Default/MoviePlayback/SpokenAudio mode and no options, so it cannot be assembled from separate calls. - Report the resolved rendering mode in the player, hidden unless the system resolves it. Apple only resolves it for CarPlay and AirPlay, so an unresolved value means unknown, never "not Dolby". Diagnostics (Apple TV only, Settings > Video Playback > Atmos Output Test): - Add a sample-buffer arm. It reads the asset with AVAssetReader at outputSettings nil and hands the untouched compressed buffers and the untouched format description straight to the renderer, with a variant that rebuilds the description the way playback builds it. Every existing mode went through AVPlayer, so nothing exercised the path playback actually uses; this is what tells us whether the renderer or our construction is at fault. - Add an AirPlay route picker. AirPlay is the only route where the system resolves the rendering mode and the supported channel layouts, so it is what makes those observations reachable at all, and the AVPlayer arms now allow external playback so every arm can be compared on the same destination. - Add a session-mode toggle for the one profile difference between the guide and previous playback behaviour. - Report the session profile, supported layouts, both format descriptions, the magic cookie and the renderer status, and release the session on stop so a failed run cannot contaminate the next one. Also bumps MPVKit to 1.0.14, which carries the matching audio output work: the channel layout AVFoundation itself uses for Dolby content, a renderer-failure observer so the fallback to PCM can actually run, the prescribed feed ordering and preroll, flush recovery that re-supplies the discarded audio instead of shifting later audio into its place, and capability-driven fallback on route and capability changes. This does not yet fix #1300. Whether the sample-buffer renderer can carry JOC is still unknown; it removes every difference from the documented setup that could explain the failure, and gives us the arm to answer it on real hardware.
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edde746
@@ -418,6 +418,15 @@ class Translations$settings$zh extends Translations$settings$en {
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@override String get atmosTestRawStreamDescription => '以与播放器内 Atmos 播放完全相同的方式流式传输测试文件。需要测试文件 URL。';
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@override String get atmosTestRawFile => '原始 EAC3 文件';
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@override String get atmosTestRawFileDescription => '以已知长度播放测试文件。需要测试文件 URL。';
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@override String get atmosTestAsbarNative => '采样缓冲渲染器（原生）';
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@override String get atmosTestAsbarNativeDescription => '将文件未经改动的压缩音频直接交给系统渲染器。需要测试文件 URL。';
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@override String get atmosTestAsbarGenerated => '采样缓冲渲染器（重建）';
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@override String get atmosTestAsbarGeneratedDescription => '相同，但音频描述按播放时的方式重建。需要测试文件 URL。';
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@override String get atmosTestSessionMode => '使用影片播放会话模式';
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@override String get atmosTestSessionModeDescription => '关闭时使用 Dolby 文档所述的模式。开启时使用先前的模式。';
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@override String get atmosTestShowRoutePicker => '选择 AirPlay 输出';
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@override String get atmosTestHideRoutePicker => '隐藏 AirPlay 输出选择器';
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@override String get atmosTestRoutePickerDescription => '将测试发送到 AirPlay 接收器。只有 AirPlay 会报告已确定的音频模式。';
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@override String get atmosTestStop => '停止测试';
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@override String get atmosTestUrl => '测试文件 URL';
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@override String get atmosTestUrlDescription => '原始 .ec3 Dolby Atmos 文件的 HTTP URL（例如用 ffmpeg 提取）';
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@@ -1511,6 +1520,11 @@ class Translations$videoSettings$zh extends Translations$videoSettings$en {
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@override String get audioOutput => '音频输出';
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@override String get performanceOverlay => '性能监控';
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@override String get audioPassthrough => '音频直通';
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@override String get audioOutputDolbyAtmos => 'Dolby Atmos';
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@override String get audioOutputDolbyAudio => 'Dolby Audio';
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@override String get audioOutputSurround => '环绕声';
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@override String get audioOutputSpatial => '空间音频';
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@override String get audioOutputStereo => '立体声';
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@override String get audioNormalization => '响度标准化';
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@override String get audioDownmix => '下混为立体声';
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}
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@@ -2460,6 +2474,15 @@ extension on TranslationsZh {
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'settings.atmosTestRawStreamDescription' => '以与播放器内 Atmos 播放完全相同的方式流式传输测试文件。需要测试文件 URL。',
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'settings.atmosTestRawFile' => '原始 EAC3 文件',
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'settings.atmosTestRawFileDescription' => '以已知长度播放测试文件。需要测试文件 URL。',
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'settings.atmosTestAsbarNative' => '采样缓冲渲染器（原生）',
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'settings.atmosTestAsbarNativeDescription' => '将文件未经改动的压缩音频直接交给系统渲染器。需要测试文件 URL。',
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'settings.atmosTestAsbarGenerated' => '采样缓冲渲染器（重建）',
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'settings.atmosTestAsbarGeneratedDescription' => '相同，但音频描述按播放时的方式重建。需要测试文件 URL。',
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'settings.atmosTestSessionMode' => '使用影片播放会话模式',
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'settings.atmosTestSessionModeDescription' => '关闭时使用 Dolby 文档所述的模式。开启时使用先前的模式。',
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'settings.atmosTestShowRoutePicker' => '选择 AirPlay 输出',
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'settings.atmosTestHideRoutePicker' => '隐藏 AirPlay 输出选择器',
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'settings.atmosTestRoutePickerDescription' => '将测试发送到 AirPlay 接收器。只有 AirPlay 会报告已确定的音频模式。',
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'settings.atmosTestStop' => '停止测试',
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'settings.atmosTestUrl' => '测试文件 URL',
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'settings.atmosTestUrlDescription' => '原始 .ec3 Dolby Atmos 文件的 HTTP URL（例如用 ffmpeg 提取）',
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@@ -2687,6 +2710,8 @@ extension on TranslationsZh {
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'videoControls.language' => '语言',
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'videoControls.noSubtitlesFound' => '未找到字幕',
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'videoControls.noSubtitlesAvailable' => '没有可用字幕',
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_ => null,
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} ?? switch (path) {
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'videoControls.noAudioTracksAvailable' => '没有可用音轨',
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'videoControls.noTracksAvailable' => '没有可用音轨',
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'videoControls.subtitleDownloaded' => '字幕已下载',
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@@ -2696,8 +2721,6 @@ extension on TranslationsZh {
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'messages.markedAsWatched' => '已标记为已观看',
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'messages.markedAsUnwatched' => '已标记为未观看',
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'messages.markedAsWatchedOffline' => '已标记为已观看（将在联网时同步）',
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_ => null,
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} ?? switch (path) {
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'messages.markedAsUnwatchedOffline' => '已标记为未观看（将在联网时同步）',
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'messages.autoRemovedWatchedDownload' => ({required Object title}) => '已自动移除：${title}',
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'messages.autoRemovedWatchedDownloads' => ({required num n}) => (_root.$meta.cardinalResolver ?? PluralResolvers.cardinal('zh'))(n, other: '已自动移除 ${n} 个看过的下载', ),
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@@ -3201,6 +3224,8 @@ extension on TranslationsZh {
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'watchTogether.codeMustBe5Chars' => '会话代码必须是 5 个字符',
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'watchTogether.joinInstructions' => '输入主持人的会话代码以加入。',
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'watchTogether.failedToCreate' => '创建会话失败',
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_ => null,
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} ?? switch (path) {
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'watchTogether.failedToJoin' => '加入会话失败',
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'watchTogether.sessionCodeCopied' => '会话代码已复制到剪贴板',
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'watchTogether.relayUnreachable' => '无法访问中继服务器。网络运营商的屏蔽可能导致“一起看”不可用。',
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@@ -3210,8 +3235,6 @@ extension on TranslationsZh {
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'watchTogether.joinCurrentPlaybackDescription' => '加入主持人当前正在观看的内容',
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'watchTogether.failedToOpenCurrentPlayback' => '无法打开当前播放',
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'watchTogether.participantJoined' => ({required Object name}) => '${name} 已加入',
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_ => null,
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} ?? switch (path) {
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'watchTogether.participantLeft' => ({required Object name}) => '${name} 已离开',
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'watchTogether.participantPaused' => ({required Object name}) => '${name} 暂停了播放',
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'watchTogether.participantResumed' => ({required Object name}) => '${name} 恢复了播放',
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@@ -3410,6 +3433,11 @@ extension on TranslationsZh {
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'videoSettings.audioOutput' => '音频输出',
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'videoSettings.performanceOverlay' => '性能监控',
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'videoSettings.audioPassthrough' => '音频直通',
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'videoSettings.audioOutputDolbyAtmos' => 'Dolby Atmos',
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'videoSettings.audioOutputDolbyAudio' => 'Dolby Audio',
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'videoSettings.audioOutputSurround' => '环绕声',
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'videoSettings.audioOutputSpatial' => '空间音频',
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'videoSettings.audioOutputStereo' => '立体声',
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'videoSettings.audioNormalization' => '响度标准化',
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'videoSettings.audioDownmix' => '下混为立体声',
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'performanceOverlay.color' => '颜色',
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