diff --git a/packages/artplayer-plugin-dash-control/ARCHITECTURE.md b/packages/artplayer-plugin-dash-control/ARCHITECTURE.md index 13a904e54..876e12ce5 100644 --- a/packages/artplayer-plugin-dash-control/ARCHITECTURE.md +++ b/packages/artplayer-plugin-dash-control/ARCHITECTURE.md @@ -151,8 +151,12 @@ devices and installed package acceptance remain separate release gates. `dash-sdk.spec.js` now separately loads hash-pinned npm dash.js 4.5.2/5.2.1 and local multi-quality/multi-audio DASH segments. It covers decoding, explicit update after external selection, source topology replacement, retained callbacks and SDK ownership. -It also includes a native SDK control without an ArtPlayer instance. Early SDK 4.5.2 -paused-seek stalls remain open; later passes do not resolve them. Unsupported MSE is +It also includes a native SDK control without an ArtPlayer instance. SDK 4.5.2 +paused-seek stalls reproduce independently: its empty buffer-clear path preserves +stale buffer metrics and can prevent further scheduling. A diagnostic backport of +the SDK 5 buffer-level refresh confirms the cause; no production workaround ships. +See the [diagnosis](../../refactor/changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md). +The compatibility risk remains open. Unsupported MSE is recorded as a playback capability gap, not acceptance. SDK event tests also cover external selections without explicit update, same-SDK source replacement, asynchronous formatter error/recovery, and actual setting clicks during SDK refresh. diff --git a/refactor/baselines/dash-seek-diagnosis.json b/refactor/baselines/dash-seek-diagnosis.json new file mode 100644 index 000000000..cdfa0fa81 --- /dev/null +++ b/refactor/baselines/dash-seek-diagnosis.json @@ -0,0 +1,3705 @@ +{ + "schemaVersion": 1, + "task": "PKG-DASH-05", + "risk": "DASH-SEEK-01", + "sourceCommit": "a9cf50bc", + "status": "root cause identified; production mitigation and release acceptance remain open", + "inputs": [ + { + "file": "test/browser/dash-sdk.spec.js", + "sha256LF": "51a11287230b7b8a2f392c939cda1c2f8da356208dc8de5966e8cb2c4c69999f" + }, + { + "file": "test/browser/dash-buffer-observer.js", + "sha256LF": "37d8e8ab67155a99a233afa35a82da777fdfb3f691e47a4b0016a46b09b3daa0" + } + ], + "sources": [ + { + "version": "4.5.2", + "archiveSHA256": "9a0944c48deb0fd8f92b0eea436c5b0d0aea9237c7da0078c0310f1430d0a31f", + "member": "package/dist/dash.all.debug.js", + "sha256": "90bc26d2d3ba5a204a97d21bcfe246aab60f13f60ad75840c7f1fcc909986769", + "methodLine": 41184, + "emptyBranchRefreshesLevel": false + }, + { + "version": "5.2.1", + "archiveSHA256": "4eacb0cc3525276666ca3f084611cdabb5a2264d128dfe0750fe106fbddd088f", + "member": "package/dist/modern/umd/dash.all.debug.js", + "sha256": "94a3c83e8c78da6f4f29ecca2403d6c4114c7edca79349a092e7df87c5d9aa53", + "methodLine": 44777, + "emptyBranchRefreshesLevel": true + } + ], + "artifacts": [ + { + "file": "packages/artplayer-plugin-dash-control/dist/artplayer-plugin-dash-control.js", + "bytes": 7410, + "sha256": "a594009be5c17406844f817c5a79930c6ed60add4a5ef0578783f163a1bae012", + "unchangedFrom": "a9cf50bc" + }, + { + "file": "packages/artplayer-plugin-dash-control/dist/artplayer-plugin-dash-control.legacy.js", + "bytes": 7881, + "sha256": 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"refactor/.cache/dash05-seek-debug-control.log", + "bytes": 4096, + "sha256": "421540f62ef24389fca054550dce3d7bd246f9a4160f7fe22a440df7c833b0e0" + }, + { + "file": "refactor/.cache/dash05-seek-native-held.log", + "bytes": 7342, + "sha256": "15508383a33234f1f9c5eb5e263757d6c7559974bf91d7764f9b23307d92bbfc" + }, + { + "file": "refactor/.cache/dash05-seek-patch-counterfactual.log", + "bytes": 3195, + "sha256": "ee6e4f18cc8e948c74b57dbff0a12af7b27456c3d82570486266816fae4d0dbc" + }, + { + "file": "refactor/.cache/dash05-seek-processors.log", + "bytes": 10619, + "sha256": "4c9ff06f3a5156aedc08a6330396b5ae45c4bc979d7ddda688728d25657480b1" + }, + { + "file": "refactor/.cache/dash05-seek-target-after.log", + "bytes": 3196, + "sha256": "5534ff0471bbbeb923d0216de947f4df5f499cae351784cb4adf47360a9526d6" + }, + { + "file": "refactor/.cache/dash05-seek-target.log", + "bytes": 2496, + "sha256": "350a70c414bc35fc08cccac6841f349e40d28581d8e5de23b8f207be41b981f4" + } + ], + "conclusion": "SDK 4 empty buffer-clear branch preserves stale pre-seek metrics above scheduling target; with no later progress/timeupdate event, loading cannot resume. Native SDK 4 reproduces on both engines; synthetic metric refresh and one-line diagnostic backport restore playback. SDK 5 includes the refresh and passes the held-pause native cases.", + "exclusions": [ + "No runtime, declaration, dependency or SDK upgrade shipped", + "No synthetic timeupdate in production or default validation", + "Diagnostic patched SDK is not official SDK acceptance", + "SDK 4 risk stays open until compatible mitigation or reviewed release disposition", + "One intermediate syntax error prevented test discovery; original log retained", + "No complete browser matrix or full CI claimed for this diagnostic-only change" + ] +} diff --git a/refactor/changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md b/refactor/changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md new file mode 100644 index 000000000..3953bdbfe --- /dev/null +++ b/refactor/changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md @@ -0,0 +1,68 @@ +# PKG-DASH-05：暂停 seek 停滞的 SDK 根因 + +起点 `a9cf50bc`。本批没有修改生产源码、公开声明、依赖或产物。DASH-SEEK-01 从 +“偶发且来源未知”推进到可独立复现的 SDK 4.5.2 调度缺陷；**风险仍 open**，不能把诊断 +补丁的通过当成实际发布 SDK 或本项目的修复。DASH-05 继续 doing。 + +## 证据链 + +1. 给现有真实 SDK 测试增加原生 SourceBuffer 观测。原生 addSourceBuffer 仍以相同 this、 + 参数执行一次，返回原对象；额外监听 updateend 并读取缓冲，不改写媒体时间或片段。 + 首次 10 项中 9 通过、1 失败，再次复现新核心/已发布插件的 6 秒停滞。 +2. 失败时视频 SourceBuffer 与 video.buffered 均止于 5.999999 秒，排除 Chromium 上 + “SourceBuffer 其实已覆盖 6 秒”的猜测。SDK 仍保留暂停前约 2.975 秒的视频缓冲指标。 +3. 加入实际 SDK seekTime、timeupdate、bufferLevelUpdated 和处理器状态：10 项中 + 8 通过、2 失败，新旧核心搭配发布插件均失败。SDK 收到的目标为 6；视频 hasTarget=false、 + pruning=false、complete=false，旧缓冲量约 2.96 秒；seek 后没有后续时间/缓冲更新。 +4. 原生 SDK 对照不创建 ArtPlayer，只使用同一媒体、相同 SDK 设置和选择顺序。等待音轨 + 渲染完成，在约 3 秒暂停，并观察半秒内没有时钟/追加事件，再 seek 到 6 秒。 + 实际 npm 4.5.2 在 Chromium/Firefox 都失败，5.2.1 两边通过。该等待用于建立真实暂停 + 稳态、排除仍排队的进度更新，没有延长恢复超时或改变目标。 +5. 仅在上述断言失败后，启用诊断开关注入一次原生元素 timeupdate：SDK 4 视频指标立即 + 从 2.81/2.748 变成 0，随后请求下一视频片段，buffered 延长到约 8 秒，播放越过 6.2。 + 原测试仍记为失败，合成事件没有进入生产实现或默认验证路径。 +6. 读取校验过完整 npm 归档的 debug 成员：4.5.2 的 BufferController.clearBuffers 在 + ranges 为空时直接 resolve；5.2.1 同一分支先调用 _updateBufferLevel。 + 4.x ScheduleController 以缓存指标是否小于目标决定请求；失败时视频指标约 2.8 而 + 目标为 2，即使当前位置实际缺帧也不会下载。无后续 progress/timeupdate 时形成停滞。 +7. 保持 SDK 4 debug 字节不变的原生对照 1 通过/1 失败；仅在空裁剪分支增加 + _updateBufferLevel 的诊断补丁，原生及新旧核心/插件组合 10 项全部通过。 + 这是因果对照，不是正式 SDK 的发布准入。 + +Firefox 的视频范围恰好止于 6，SDK 的包含端点判断返回 true，但解码下一帧仍需下一片段。 +该路径的 pruneBuffer 也经过空 clearBuffers；相同缓冲量刷新解释了两引擎的恢复。 +这批证据说明是 SDK 调度所需数据未更新，不是 ArtPlayer 新核心修改了 seek 目标；历史 +Firefox/候选插件失败仍保留，不能据此声称所有其他 DASH 风险已经解决。 + +## 测试入口与隔离 + +默认 `yarn test:browser test/browser/dash-sdk.spec.js` 仍加载原始固定 npm min 产物。 +新增 `test/browser/dash-buffer-observer.js` 保存浏览器缓冲、SDK 指标及可用处理器状态。 +SDK 内部诊断 getter 不可用时只标记 unavailable；不通过修改 SDK 来模拟这些状态。 +每页新建后安装观测器，页面关闭释放资源，不复用到产品 demo。 + +原生复现可用 `--grep 'native SDK' --project chromium --project firefox --trace on`。 +诊断环境变量（用完应清空；每次运行前后归档共享报告和 traces）： + +| 变量 | 值与用途 | +| --- | --- | +| ARTPLAYER_DASH_DIAGNOSE_STALL | 1：已失败且停在 6 秒时，保存合成时间更新的前后状态，不改变失败结果 | +| ARTPLAYER_DASH_DIAGNOSTIC_SDK | none/未设置：原始 min；upstream4：原始 SDK 4 debug；bufferlevel4：单分支诊断补丁 | + +debug 成员来自完整性校验后的 npm 归档；补丁仅在内存替换唯一匹配的完整分支，匹配数 +不是一就报错。输入附件记录原始/有效代码 SHA256、member、模式和 acceptance=false。 +不得在正式报告中省略诊断模式，不得把补丁归档冒充上游包，也不得将合成事件作为产品修复。 + +过程中一次括号笔误导致测试发现失败，日志保留；修正语法后继续取证。加入 seekTime 的 +中间运行 10 项通过，但没有以它关闭风险。全部失败、通过和对照的报告/trace 分别冻结， +见 [机器证据](../baselines/dash-seek-diagnosis.json)。本地缓存不提交，测试和摘要可重跑。 + +## 后续与回退 + +旧 SDK 合法调用仍须兼容；不能要求用户升级 SDK 后才算重构完成。后续应评审隔离且不改变 +调用方媒体事件/SDK 所有权的兼容处置，或正式记录第三方边界与发布处理。在此之前，风险和 +设备/完整分发门槛保持开放。不得在核心伪造 timeupdate、偏移 seek 或全局放宽测试。 + +局部 lint、既有 SDK/媒体来源测试及计划/风险链接校验用于本批验证；没有改生产代码， +不重复宣称完成全项目 CI 或 114 项完整浏览器验收。回退本批仅涉及诊断测试与文档， +生产产物与 a9cf50bc 的指纹保持一致。 diff --git a/refactor/dash-validation.md b/refactor/dash-validation.md index 78f869534..86fa40d76 100644 --- a/refactor/dash-validation.md +++ b/refactor/dash-validation.md @@ -79,3 +79,11 @@ UMD 测试 VM 显式注入宿主 console，以检查原始错误身份；没有 纯配置修改但没有 SDK 事件时，保留同步 update 为即时刷新入口；播放 tick 仅检查 Auto 布尔值变化，没有新定时器。真实 SDK/媒体验证与剩余 seek/设备边界见 [事件改造记录](changes/2026-09-12-PKG-DASH-05-sdk-events.md)。历史失败证据保留，后续通过不抹去它们。 + +## 05 暂停 seek 诊断 + +实际 SDK 4.5.2 在不创建 ArtPlayer 的稳定暂停用例中也会停滞，SDK 5.2.1 的对应用例通过。 +根因与空裁剪分支漏更新缓冲指标有关，DASH-SEEK-01 仍 open；没有发布兼容补丁。 +`dash-buffer-observer.js` 记录原生 SourceBuffer/SDK 指标，两个显式诊断环境变量只用于 +失败后的合成事件和内存 SDK 补丁对照，不能用于正式验收。命令、证据、限制和回退见 +[seek 根因记录](changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md)。 diff --git a/refactor/plan.md b/refactor/plan.md index 5d159ff67..d45e20aea 100644 --- a/refactor/plan.md +++ b/refactor/plan.md @@ -483,4 +483,4 @@ - PKG-DASH-02: [记录](changes/2026-09-12-PKG-DASH-02-tests.md) [记录](dash-validation.md) [记录](baselines/dash-validation.json) - PKG-DASH-03: [记录](changes/2026-09-12-PKG-DASH-03-runtime.md) [记录](baselines/dash-runtime.json) [记录](dash-validation.md) - PKG-DASH-04: [记录](changes/2026-09-12-PKG-DASH-04-types.md) [记录](baselines/dash-types-validation.json) [记录](dash-validation.md) -- PKG-DASH-05: [记录](changes/2026-09-12-PKG-DASH-05-sdk-checkpoint.md) [记录](baselines/dash-sdk.json) [记录](baselines/dash-sdk-checkpoint.json) [记录](dash-validation.md) [记录](changes/2026-09-12-PKG-DASH-05-sdk-types.md) [记录](baselines/dash-sdk-types-validation.json) [记录](changes/2026-09-12-PKG-DASH-05-sdk-events.md) [记录](baselines/dash-sdk-events-validation.json) +- PKG-DASH-05: [记录](changes/2026-09-12-PKG-DASH-05-sdk-checkpoint.md) [记录](baselines/dash-sdk.json) [记录](baselines/dash-sdk-checkpoint.json) [记录](dash-validation.md) [记录](changes/2026-09-12-PKG-DASH-05-sdk-types.md) [记录](baselines/dash-sdk-types-validation.json) [记录](changes/2026-09-12-PKG-DASH-05-sdk-events.md) [记录](baselines/dash-sdk-events-validation.json) [记录](changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md) [记录](baselines/dash-seek-diagnosis.json) diff --git a/refactor/progress.md b/refactor/progress.md index adc2ef289..74d48c1ed 100644 --- a/refactor/progress.md +++ b/refactor/progress.md @@ -1,5 +1,17 @@ # 进度与证据 +## 当前实施：DASH-05 暂停 seek 根因已定位 + +真实 SourceBuffer、SDK seekTime/缓冲事件和处理器状态表明，SDK 4.5.2 在空裁剪分支未更新 +暂停前缓冲量，调度器继续按旧值阻止下载。不创建 ArtPlayer 的稳定暂停用例在 Chromium/ +Firefox 都复现；失败后合成一次 timeupdate 能恢复，测试仍保留失败。SDK 5.2.1 原生用例 +两边通过；将其缓冲刷新移入 SDK 4 的单分支诊断补丁后，原生/新旧组合 10 项通过。 + +本批只增加诊断测试和证据，没有向生产注入事件、修补 SDK、增加依赖或改变产物。 +DASH-SEEK-01 根因已知但兼容处置尚未完成，仍 open。DASH-05 仍 doing，217 项仍为 +74 done、4 doing、139 todo。详见 [根因记录](changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md) +和 [执行证据](baselines/dash-seek-diagnosis.json)。其余包的独立源码迁移可继续，发布门槛不降低。 + ## 当前实施：DASH-05 SDK 事件刷新源码改造 新增第六个严格 TS 模块 sdk-events：按 SDK 质量/音轨/流事件合并刷新菜单，保留同步 diff --git a/refactor/risk-table.md b/refactor/risk-table.md index 4937abef3..46cc135f4 100644 --- a/refactor/risk-table.md +++ b/refactor/risk-table.md @@ -140,4 +140,4 @@ | DASH-STATE-01 | resolved / 已复现 | DASH 当前项高亮使用真值 ID、音轨身份和标签去重，边界待核实 | PKG-DASH-02, PKG-DASH-03, PKG-DASH-05 | | DASH-TYPE-01 | resolved / 源码/产物事实 | DASH 类型未表达默认工厂参数、SDK 回调对象和现代模块入口 | PKG-DASH-04 | | DASH-DEMO-01 | open / 源码/产物事实 | DASH 示例仅新 SDK 且重复安装会累积销毁回调 | PKG-DASH-06 | -| DASH-SEEK-01 | open / 已复现 | 真实 dash.js 4.5.2 暂停 seek 到缓冲片段边界后可能持续 waiting | PKG-DASH-05, REVIEW-02 | +| DASH-SEEK-01 | open / 已复现 | dash.js 4.5.2 空裁剪漏更新缓冲量，稳定暂停 seek 后调度停滞 | PKG-DASH-05, REVIEW-02 | diff --git a/refactor/risks.json b/refactor/risks.json index 4b09f8951..ef12a7bf7 100644 --- a/refactor/risks.json +++ b/refactor/risks.json @@ -2964,7 +2964,7 @@ }, { "id": "DASH-SEEK-01", - "title": "真实 dash.js 4.5.2 暂停 seek 到缓冲片段边界后可能持续 waiting", + "title": "dash.js 4.5.2 空裁剪漏更新缓冲量，稳定暂停 seek 后调度停滞", "confirmation": "reproduced", "status": "open", "owners": [ @@ -2974,9 +2974,12 @@ "evidence": [ "test/browser/dash-sdk.spec.js", "refactor/baselines/dash-sdk-checkpoint.json", - "refactor/changes/2026-09-12-PKG-DASH-05-sdk-checkpoint.md" + "refactor/changes/2026-09-12-PKG-DASH-05-sdk-checkpoint.md", + "refactor/changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md", + "refactor/baselines/dash-seek-diagnosis.json", + "test/browser/dash-buffer-observer.js" ], - "compatibleResolution": "先比较实际 SDK、SourceBuffer/video 缓冲与暂停 seek 调度；不偏移公开 seek 目标，不吞异常或增加超时伪造通过。", + "compatibleResolution": "已用原生 SDK、SourceBuffer/调度指标和 SDK 5 空裁剪刷新的一行诊断回植确认根因。兼容处置尚未落地；不在核心伪造 timeupdate、不偏移 seek、不强制所有旧用户升级 SDK，也不将诊断补丁计为正式上游通过。", "closureCriteria": "原失败的新旧核心/插件组合有确定根因与对应修复/可验证环境边界；原生对照及原顺序、原目标回归成立，后续偶然通过不能关闭。" } ] diff --git a/refactor/tasks.json b/refactor/tasks.json index d4633c7b8..17d1754f4 100644 --- a/refactor/tasks.json +++ b/refactor/tasks.json @@ -2070,7 +2070,9 @@ "changes/2026-09-12-PKG-DASH-05-sdk-types.md", "baselines/dash-sdk-types-validation.json", "changes/2026-09-12-PKG-DASH-05-sdk-events.md", - "baselines/dash-sdk-events-validation.json" + "baselines/dash-sdk-events-validation.json", + "changes/2026-09-12-PKG-DASH-05-seek-diagnosis.md", + "baselines/dash-seek-diagnosis.json" ] }, { diff --git a/refactor/third-party.json b/refactor/third-party.json index ceabb0960..d174c1d67 100644 --- a/refactor/third-party.json +++ b/refactor/third-party.json @@ -1054,7 +1054,7 @@ "refactor/scripts/dash-sdk-types.test.mjs" ], "contract": "Caller owns art.dash. Candidate adapts the released 4.x quality method surface and workspace 5.x stable representation ID surface. Controlled contracts and DOM validation pass; actual pinned 4.5.2/5.2.1 SDK media remains PKG-DASH-05.", - "validationStatus": "Pinned npm SDK 4.5.2/5.2.1 main/legacy media, automatic state refresh, same-SDK source replacement, settings selection and formatter recovery exercised. DASH-SEEK-01 and Windows WebKit MSE gap remain. Actual SDK declarations and exact peer closure tested across ten compiler/module configurations, with no added plugin errors and upstream-only Node10/old DOM limitations. Devices and full distribution remain incomplete; see refactor/baselines/dash-sdk-events-validation.json.", + "validationStatus": "Pinned npm SDK 4.5.2/5.2.1 main/legacy media, automatic state refresh, same-SDK source replacement, settings selection and formatter recovery exercised. DASH-SEEK-01 is isolated to SDK 4 stale buffer metrics in its empty-clear branch using native playback and a diagnostic SDK 5 backport; no production mitigation ships and the risk remains open (refactor/baselines/dash-seek-diagnosis.json). Windows WebKit MSE, devices and full distribution remain incomplete. Actual SDK declarations and peer closure retain the ten-configuration matrix and upstream-only Node10/old DOM limits.", "demoPathsSource": "refactor/baselines/demo-inventory.json" }, { diff --git a/test/browser/dash-buffer-observer.js b/test/browser/dash-buffer-observer.js new file mode 100644 index 000000000..ebd9a1cdd --- /dev/null +++ b/test/browser/dash-buffer-observer.js @@ -0,0 +1,50 @@ +// Runs inside the page. Every SDK operation still uses the native SourceBuffer. +export function observeDashBuffers() { + const buffers = [] + const events = [] + const ranges = value => Array.from({ length: value.length }, (_, index) => [value.start(index), value.end(index)]) + function snapshot() { + const video = window.art?.video || window.nativeVideo + const dash = window.art?.dash || window.nativeDash + const metrics = dash?.getDashMetrics() + let processors + try { + processors = dash?.getActiveStream()?.getProcessors().map((processor) => { + const buffer = processor.getBufferController() + return { type: processor.getType(), level: processor.getBufferLevel(), target: processor.getScheduleController().getBufferTarget(), complete: processor.isBufferingCompleted(), pruning: buffer.getIsPruningInProgress(), hasTarget: video ? buffer.hasBufferAtTime(video.currentTime) : null } + }) + } + catch (error) { + // SDK initialization/teardown and generations expose different internals. + processors = { unavailable: String(error) } + } + return { + time: video?.currentTime, + paused: video?.paused, + seeking: video?.seeking, + readyState: video?.readyState, + video: video ? ranges(video.buffered) : [], + levels: metrics ? { video: metrics.getCurrentBufferLevel('video'), audio: metrics.getCurrentBufferLevel('audio') } : null, + processors, + buffers: buffers.map(({ source, buffer, mime }) => { + try { + return { mime, sourceState: source.readyState, updating: buffer.updating, ranges: ranges(buffer.buffered), timestampOffset: buffer.timestampOffset } + } + catch (error) { + return { mime, sourceState: source.readyState, error: error.name } + } + }), + } + } + const mark = name => events.push({ name, at: performance.now(), ...snapshot() }) + for (const Source of new Set([window.MediaSource, window.ManagedMediaSource].filter(Boolean))) { + const addSourceBuffer = Source.prototype.addSourceBuffer + Source.prototype.addSourceBuffer = function (...args) { + const buffer = Reflect.apply(addSourceBuffer, this, args) + buffers.push({ source: this, buffer, mime: args[0] }) + buffer.addEventListener('updateend', () => mark('sourcebuffer:updateend')) + return buffer + } + } + window.dashBuffers = { snapshot, mark, events } +} diff --git a/test/browser/dash-sdk.spec.js b/test/browser/dash-sdk.spec.js index 905925ec8..73cc544f1 100644 --- a/test/browser/dash-sdk.spec.js +++ b/test/browser/dash-sdk.spec.js @@ -3,6 +3,7 @@ import fs from 'node:fs' import process from 'node:process' import { ensureArchive, hash, readMember } from '../../refactor/scripts/releases.mjs' import { compilePackage } from '../helpers/load.js' +import { observeDashBuffers } from './dash-buffer-observer.js' import { expect, test } from './fixtures.js' const sdks = new Map() @@ -11,6 +12,8 @@ let candidate let published let mediaManifest let pluginRelease +const diagnosticSDK = process.env.ARTPLAYER_DASH_DIAGNOSTIC_SDK || 'none' +assert(['none', 'upstream4', 'bufferlevel4'].includes(diagnosticSDK), 'Unknown diagnostic SDK mode') test.beforeAll(async () => { const baseline = JSON.parse(fs.readFileSync(new URL('../../refactor/baselines/dash-sdk.json', import.meta.url))) @@ -18,7 +21,20 @@ test.beforeAll(async () => { const archive = await ensureArchive(sdk.release) const bytes = readMember(archive, sdk.codeMember) assert.equal(hash(bytes), sdk.release.files[sdk.codeMember]) - sdks.set(sdk.release.version, { ...sdk, code: bytes.toString() }) + let code = bytes.toString() + let diagnostic + if (sdk.release.version === '4.5.2' && diagnosticSDK !== 'none') { + const member = 'package/dist/dash.all.debug.js' + code = readMember(archive, member).toString() + const upstreamSHA256 = hash(code) + if (diagnosticSDK === 'bufferlevel4') { + const before = 'function clearBuffers(ranges) {\n return new Promise(function (resolve, reject) {\n if (!ranges || !sourceBufferSink || ranges.length === 0) {\n resolve();' + assert.equal(code.split(before).length, 2, 'Diagnostic patch must match exactly one upstream branch') + code = code.replace(before, before.replace(' resolve();', ' _updateBufferLevel();\n resolve();')) + } + diagnostic = { mode: diagnosticSDK, member, upstreamSHA256, effectiveSHA256: hash(code), acceptance: false } + } + sdks.set(sdk.release.version, { ...sdk, code, diagnostic }) } pluginRelease = JSON.parse(fs.readFileSync(new URL('../../refactor/baselines/dash-control-release.json', import.meta.url))).release const bytes = readMember(await ensureArchive(pluginRelease), 'package/dist/artplayer-plugin-dash-control.js') @@ -50,9 +66,21 @@ test.afterEach(async ({ page }, testInfo) => { } const video = art?.video || window.nativeVideo const buffered = video ? Array.from({ length: video.buffered.length }, (_, index) => [video.buffered.start(index), video.buffered.end(index)]) : [] - return { errors: window.sdkErrors, events: window.sdkEvents, mediaEvents: window.mediaEvents, nativePlay: window.nativePlay, tracks, levels, buffered, paused: video?.paused, seeking: video?.seeking, time: video?.currentTime, ready: art?.isReady, width: video?.videoWidth, height: video?.videoHeight, error: video?.error?.code, readyState: video?.readyState, destroyed: window.sdkDestroyed } + return { errors: window.sdkErrors, events: window.sdkEvents, mediaEvents: window.mediaEvents, nativePlay: window.nativePlay, tracks, levels, buffered, paused: video?.paused, seeking: video?.seeking, time: video?.currentTime, ready: art?.isReady, width: video?.videoWidth, height: video?.videoHeight, error: video?.error?.code, readyState: video?.readyState, destroyed: window.sdkDestroyed, bufferState: window.dashBuffers?.snapshot(), bufferEvents: window.dashBuffers?.events } }).catch(error => ({ error: error.message })) await testInfo.attach('dash-sdk-state', { contentType: 'application/json', body: JSON.stringify(state) }) + // Opt-in counterfactual after a failed assertion; it never turns a failure green. + if (process.env.ARTPLAYER_DASH_DIAGNOSE_STALL === '1' && testInfo.status !== testInfo.expectedStatus && state.seeking && state.time === 6) { + const recovery = await page.evaluate(() => { + const before = window.dashBuffers.snapshot() + const video = window.art?.video || window.nativeVideo + video.dispatchEvent(new Event('timeupdate')) + return { before, afterDispatch: window.dashBuffers.snapshot() } + }) + recovery.advanced = await page.waitForFunction(() => (window.art?.video || window.nativeVideo).currentTime > 6.2, null, { timeout: 3000 }).then(() => true, () => false) + recovery.final = await page.evaluate(() => window.dashBuffers.snapshot()) + await testInfo.attach('diagnostic-synthetic-timeupdate', { contentType: 'application/json', body: JSON.stringify(recovery) }) + } if (!page.isClosed()) { await page.evaluate(() => { if (window.art && !window.art.isDestroy) @@ -65,9 +93,10 @@ test.afterEach(async ({ page }, testInfo) => { async function loadSDK(page, version, core, testInfo) { const sdk = sdks.get(version) await page.goto(`/test/player.html?core=${core}`) + await page.evaluate(observeDashBuffers) await page.addScriptTag({ content: sdk.code }) const capability = await page.evaluate(() => ({ sdk: window.dashjs.supportsMediaSource(), mse: typeof window.MediaSource, managed: typeof window.ManagedMediaSource, avc: Boolean(window.MediaSource?.isTypeSupported('video/mp4; codecs="avc1.42c01e"')), aac: Boolean(window.MediaSource?.isTypeSupported('audio/mp4; codecs="mp4a.40.2"')) })) - await testInfo.attach('dash-sdk-inputs', { contentType: 'application/json', body: JSON.stringify({ sdk: sdk.release, codeMember: sdk.codeMember, pluginRelease, candidateSHA256: hash(candidate), candidate: process.env.ARTPLAYER_DASH_ARTIFACT || 'workspace source build', media: mediaManifest, capability }) }) + await testInfo.attach('dash-sdk-inputs', { contentType: 'application/json', body: JSON.stringify({ sdk: sdk.release, codeMember: sdk.diagnostic?.member || sdk.codeMember, diagnostic: sdk.diagnostic, pluginRelease, candidateSHA256: hash(candidate), candidate: process.env.ARTPLAYER_DASH_ARTIFACT || 'workspace source build', media: mediaManifest, capability }) }) return capability } @@ -98,16 +127,19 @@ async function openDash(page, version, core, plugin, testInfo) { dash.updateSettings({ debug: { logLevel: 0 }, streaming: { abr: { initialBitrate: { video: 150 } }, buffer: { fastSwitchEnabled: true, bufferTimeDefault: 2, bufferTimeAtTopQuality: 2 } } }) const events = window.dashjs.MediaPlayer.events dash.on(events.ERROR, event => window.sdkErrors.push({ code: event.error?.code, message: event.error?.message, event: event.type })) - for (const name of ['STREAM_INITIALIZED', 'QUALITY_CHANGE_REQUESTED', 'QUALITY_CHANGE_RENDERED', 'TRACK_CHANGE_RENDERED', 'STREAM_TEARDOWN_COMPLETE', 'BUFFER_LEVEL_STATE_CHANGED', 'FRAGMENT_LOADING_COMPLETED', 'PLAYBACK_SEEKING', 'PLAYBACK_SEEKED']) { + for (const name of ['STREAM_INITIALIZED', 'QUALITY_CHANGE_REQUESTED', 'QUALITY_CHANGE_RENDERED', 'TRACK_CHANGE_RENDERED', 'STREAM_TEARDOWN_COMPLETE', 'BUFFER_LEVEL_STATE_CHANGED', 'BUFFER_LEVEL_UPDATED', 'FRAGMENT_LOADING_COMPLETED', 'PLAYBACK_SEEKING', 'PLAYBACK_SEEKED']) { if (events[name]) - dash.on(events[name], event => window.sdkEvents.push({ name, at: performance.now(), mediaType: event.mediaType, oldQuality: event.oldQuality, newQuality: event.newQuality, state: event.state, url: event.request?.url, time: video.currentTime })) + dash.on(events[name], event => window.sdkEvents.push({ name, at: performance.now(), mediaType: event.mediaType, oldQuality: event.oldQuality, newQuality: event.newQuality, state: event.state, bufferLevel: event.bufferLevel, url: event.request?.url, time: video.currentTime, seekTime: event.seekTime })) } dash.initialize(video, url, false) } }, }) const art = window.art - for (const name of ['play', 'playing', 'pause', 'seeking', 'seeked', 'waiting', 'emptied', 'loadedmetadata', 'loadeddata', 'canplay', 'error']) { - art.video.addEventListener(name, () => window.mediaEvents.push({ name, at: performance.now(), time: art.video.currentTime, paused: art.video.paused, readyState: art.video.readyState, buffered: Array.from({ length: art.video.buffered.length }, (_, index) => [art.video.buffered.start(index), art.video.buffered.end(index)]) })) + for (const name of ['play', 'playing', 'pause', 'seeking', 'seeked', 'waiting', 'timeupdate', 'emptied', 'loadedmetadata', 'loadeddata', 'canplay', 'error']) { + art.video.addEventListener(name, () => { + window.mediaEvents.push({ name, at: performance.now(), time: art.video.currentTime, paused: art.video.paused, readyState: art.video.readyState, buffered: Array.from({ length: art.video.buffered.length }, (_, index) => [art.video.buffered.start(index), art.video.buffered.end(index)]) }) + window.dashBuffers.mark(`media:${name}`) + }) } art.on('destroy', () => { art.dash.destroy() @@ -164,7 +196,9 @@ for (const core of ['published', 'candidate']) { await page.locator('#pause').click() expect(await page.evaluate(() => window.art.video.paused)).toBe(true) await page.evaluate(() => { + window.dashBuffers.mark('before-seek') window.art.seek = 6 + window.dashBuffers.mark('assigned-seek') }) await page.locator('#play').click() await expect.poll(() => page.evaluate(() => window.art.currentTime)).toBeGreaterThan(6.2) @@ -192,11 +226,14 @@ for (const version of ['4.5.2', '5.2.1']) { dash.updateSettings({ debug: { logLevel: 0 }, streaming: { abr: { initialBitrate: { video: 150 } }, buffer: { fastSwitchEnabled: true, bufferTimeDefault: 2, bufferTimeAtTopQuality: 2 } } }) const events = window.dashjs.MediaPlayer.events dash.on(events.ERROR, event => window.sdkErrors.push({ code: event.error?.code, message: event.error?.message })) - for (const name of ['FRAGMENT_LOADING_COMPLETED', 'TRACK_CHANGE_RENDERED', 'QUALITY_CHANGE_RENDERED', 'BUFFER_LEVEL_STATE_CHANGED', 'PLAYBACK_SEEKING', 'PLAYBACK_SEEKED']) { - dash.on(events[name], event => window.sdkEvents.push({ name, at: performance.now(), mediaType: event.mediaType, state: event.state, url: event.request?.url, time: video.currentTime })) + for (const name of ['FRAGMENT_LOADING_COMPLETED', 'TRACK_CHANGE_RENDERED', 'QUALITY_CHANGE_RENDERED', 'BUFFER_LEVEL_STATE_CHANGED', 'BUFFER_LEVEL_UPDATED', 'PLAYBACK_SEEKING', 'PLAYBACK_SEEKED']) { + dash.on(events[name], event => window.sdkEvents.push({ name, at: performance.now(), mediaType: event.mediaType, state: event.state, bufferLevel: event.bufferLevel, url: event.request?.url, time: video.currentTime, seekTime: event.seekTime })) } - for (const name of ['play', 'playing', 'pause', 'seeking', 'seeked', 'waiting']) { - video.addEventListener(name, () => window.mediaEvents.push({ name, at: performance.now(), time: video.currentTime, paused: video.paused, readyState: video.readyState, buffered: Array.from({ length: video.buffered.length }, (_, index) => [video.buffered.start(index), video.buffered.end(index)]) })) + for (const name of ['play', 'playing', 'pause', 'seeking', 'seeked', 'waiting', 'timeupdate']) { + video.addEventListener(name, () => { + window.mediaEvents.push({ name, at: performance.now(), time: video.currentTime, paused: video.paused, readyState: video.readyState, buffered: Array.from({ length: video.buffered.length }, (_, index) => [video.buffered.start(index), video.buffered.end(index)]) }) + window.dashBuffers.mark(`media:${name}`) + }) } dash.initialize(video, '/dash-fixture/master.mpd', false) document.querySelector('#play').onclick = () => { @@ -222,16 +259,27 @@ for (const version of ['4.5.2', '5.2.1']) { }) await expect.poll(() => page.evaluate(() => window.nativeVideo.videoHeight)).toBe(180) // Match the failed integrated run: video data ends at the next seek target. - await expect.poll(() => page.evaluate(() => window.nativeVideo.buffered.end(window.nativeVideo.buffered.length - 1))).toBeCloseTo(6, 4) + await expect.poll(() => page.evaluate(() => { + const video = window.nativeVideo + return video.currentTime >= 2.8 && Math.abs(video.buffered.end(video.buffered.length - 1) - 6) < 0.0001 + })).toBe(true) await page.evaluate(() => { const dash = window.nativeDash dash.updateSettings({ streaming: { abr: { autoSwitchBitrate: { video: true } } } }) dash.setCurrentTrack(dash.getTracksFor('audio').find(track => track.lang === 'fr')) }) await expect.poll(() => page.evaluate(() => window.nativeDash.getCurrentTrackFor('audio').lang)).toBe('fr') + // The recorded integrated stall happened after the audio switch was rendered. + await expect.poll(() => page.evaluate(() => window.sdkEvents.some(event => event.name === 'TRACK_CHANGE_RENDERED' && event.mediaType === 'audio'))).toBe(true) await page.locator('#pause').click() + // Observe a genuinely held pause: no clock/append events for half a second. + // This separates the seek from progress events still queued by the track switch. + await page.waitForFunction(() => window.nativeVideo.paused && performance.now() - window.dashBuffers.events.at(-1).at >= 500) + expect(await page.evaluate(() => window.nativeVideo.paused)).toBe(true) await page.evaluate(() => { + window.dashBuffers.mark('before-seek') window.nativeVideo.currentTime = 6 + window.dashBuffers.mark('assigned-seek') }) await page.locator('#play').click() await expect.poll(() => page.evaluate(() => window.nativeVideo.currentTime)).toBeGreaterThan(6.2)