fix(mpv): 控制栏解码按钮补齐 switch-cause 归因日志

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Verification: 修复：控制栏「解码」按钮（toggleDecode）此前不写 switch-cause —— 它是双 flavor 最常见的手动换软硬解入口，而 logSwitchCause 只覆盖 switchDecode(PlaySpec/Result) 两条 source-refresh 路径，等于 §7.2 第 3 项要的那类切换在设备上无日志。改动：toggleDecode 在 engine.setDecode(next) 之前捕获 previousDecode 并调 logSwitchCause("decode","user-choice",…,chosen=false)；新增回归锁 manualDecodeButtonLogsItsCauseToo（含「先捕获后覆盖」顺序断言）。验证：变异体 1（删日志行）与变异体 2（把捕获移到 setDecode 之后）均如期转红并 git hash-object 逐字节还原（7e36f22991d6f3b35f56e0796dae95e017e3e719）；定向 PlayerManagerSwitchCauseSourceTest 10/10 与 BufferingStallWatchdogTest 全绿；全量 leanback 4346 tests / 8 failed 与 C78 记录的基线失败集逐条一致（零新增失败，均为 Windows CRLF 与既有夹具缺陷）

Task-Guard: MPV-DECODE-BUTTON-CAUSE

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Silent1566 2026-10-18 16:56:39 +08:00

parent 1a6444597d

commit a9a52e2cb7

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6

app/src/main/java/com/fongmi/android/tv/player/PlayerManager.java

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16

app/src/test/java/com/fongmi/android/tv/player/PlayerManagerSwitchCauseSourceTest.java

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