检测安卓电视的HDMI服务是否已启动

Question

我们的HDMI服务出现了问题。我们的Android电视应用程序被设置为STB上的默认应用程序。当您启动STB时，它不会显示启动器，而是立即显示我们的应用程序并播放HLS视频流。为了播放视频，我们正在使用Exo Player版本2.6.1和Exo Media wrapper版本4.1.0。有时候，在DPAD唤醒后STB从睡眠中醒来时，我们会出现黑屏的情况。在这种情况下，我们获得的播放列表可以正常工作，并且切换到其他频道也可以正常工作。这个问题通常在同一用户处发生。

以下是我们在屏幕变黑时从日志中获得的内容（URL_TEST是我们的播放列表请求）：

09-06 19:21:40.018 I/PowerManagerService(  369): Waking up from sleep...
09-06 19:21:40.018 I/WindowManager(  369): No lock screen!
09-06 19:21:40.038 I/AudioHardwareALSA(  104): AudioHardwareALSA::setParameters() screen_state=on
09-06 19:21:40.038 I/qtaguid (  369): Failed write_ctrl(s 1 10056) res=-1 errno=1
09-06 19:21:40.038 W/NetworkManagementSocketTagger(  369): setKernelCountSet(10056, 1) failed with errno -1
09-06 19:21:40.078 D/LightsService(  369): Excessive delay setting light: 54ms
09-06 19:21:41.018 W/SurfaceFlinger(  101): Timed out waiting for hw vsync; faking it
09-06 19:21:41.158 W/OkHttp  (  682): previous digest authentication with same nonce failed, returning null
09-06 19:21:41.158 D/OkHttp  (  682): Cached authentication expired. Sending a new request.
09-06 19:21:42.018 W/SurfaceFlinger(  101): Timed out waiting for hw vsync; faking it
09-06 19:21:42.098 D/DAKARMainActivity(  682): URL_TEST getUri: http://XXX.XXX.XX.XXX:XXXXX/XLIVE/0431233...8355920521/26/3/stream.m3u8
09-06 19:21:43.098 W/SurfaceFlinger(  101): Timed out waiting for hw vsync; faking it
09-06 19:21:43.428 W/DisplayD(   97): iface id HDMI screen is 0
09-06 19:21:43.428 D/Displaymanager(   97): [setHDMIEnable] display 0
09-06 19:21:43.428 D/Displaymanager(   97): [operateIfaceMode] property 0 iface 4 type 1 mode 1280x720p-60
09-06 19:21:43.428 D/Displaymanager(   97): [operateIfaceEnable] property 0 iface 4 operate 1 value 1
09-06 19:21:43.438 W/Displaymanager(   97): interface 4 not support led
09-06 19:21:43.648 I/ActivityManager(  369): Config changes=1400 {1.0 ?mcc?mnc en_LU ldltr sw720dp w1280dp h672dp 160dpi lrg long land -touch -keyb/v/h dpad/v s.8}
09-06 19:21:43.658 D/RemoteControlManager(  369): BroadcastReceiver:android.intent.action.CONFIGURATION_CHANGED

当一切正常并且视频在同一设备上开始播放时，我们从日志中得到的内容（URL_TEST是我们的播放列表请求）：

09-05 19:21:58.507 I/PowerManagerService(  369): Waking up from sleep...
09-05 19:21:58.517 I/WindowManager(  369): No lock screen!
09-05 19:21:58.527 D/SurfaceFlinger(  102): Screen acquired, type=0 flinger=0x40691318
09-05 19:21:58.537 I/AudioHardwareALSA(  105): AudioHardwareALSA::setParameters() screen_state=on
09-05 19:21:58.537 I/qtaguid (  369): Failed write_ctrl(s 1 10056) res=-1 errno=1
09-05 19:21:58.537 W/NetworkManagementSocketTagger(  369): setKernelCountSet(10056, 1) failed with errno -1
09-05 19:21:58.577 W/DisplayD(   98): iface id HDMI screen is 0
09-05 19:21:58.577 D/Displaymanager(   98): [setHDMIEnable] display 0
09-05 19:21:58.577 D/Displaymanager(   98): [operateIfaceMode] property 0 iface 4 type 1 mode 1280x720p-60
09-05 19:21:58.577 D/Displaymanager(   98): [operateIfaceEnable] property 0 iface 4 operate 1 value 1
09-05 19:21:58.577 W/Displaymanager(   98): interface 4 not support led
09-05 19:21:58.587 D/LightsService(  369): Excessive delay setting light: 59ms
09-05 19:21:58.797 D/RemoteControlManager(  369): BroadcastReceiver:android.intent.action.CONFIGURATION_CHANGED
09-05 19:21:58.797 D/Environment(  369): screen raw size:1280,720
09-05 19:21:58.797 I/ActivityManager(  369): Config changes=1400 {1.0 ?mcc?mnc en_LU ldltr sw720dp w1280dp h672dp 160dpi lrg long land -touch -keyb/v/h dpad/v s.9}
09-05 19:21:58.947 W/OkHttp  (  681): previous digest authentication with same nonce failed, returning null
09-05 19:21:58.947 D/OkHttp  (  681): Cached authentication expired. Sending a new request.
09-05 19:21:59.077 I/Displaymanager(   98): updatesinkaudioinfo: 0x408de140
09-05 19:21:59.077 I/Displaymanager(   98): BUF: AC3,LPCM,
09-05 19:21:59.077 I/Displaymanager(   98): 
09-05 19:21:59.077 W/DisplayD(   98): Send msg Iface added HDMI
09-05 19:21:59.137 D/DAKARMainActivity(  681): URL_TEST getUri: http://XXX.XXX.XX.XXX:13888/XLIVE/4086274310...086993824321/26/3/stream.m3u8
09-05 19:21:59.417 I/OMXClient(  681): Using client-side OMX mux.
09-05 19:21:59.417 I/        (  681): new RKOMXPlugin
09-05 19:21:59.427 D/ACodec  (  681): MEDIA_MIMETYPE_AUDIO_AAC sampleRate 48000 wifidisplay_flag 0 info 6c5bbe78
09-05 19:21:59.427 E/OMXNodeInstance(  681): OMX_GetExtensionIndex failed   

我们注意到在黑屏时，视频请求后会有这些Displaymanager (HDMI)消息：

 09-06 19:21:42.098 D/DAKARMainActivity(  682): URL_TEST getUri: http://XXX.XXX.XX.XXX:XXXXX/XLIVE/0431233...8355920521/26/3/stream.m3u8
09-06 19:21:43.098 W/SurfaceFlinger(  101): Timed out waiting for hw vsync; faking it
09-06 19:21:43.428 W/DisplayD(   97): iface id HDMI screen is 0
09-06 19:21:43.428 D/Displaymanager(   97): [setHDMIEnable] display 0
09-06 19:21:43.428 D/Displaymanager(   97): [operateIfaceMode] property 0 iface 4 type 1 mode 1280x720p-60
09-06 19:21:43.428 D/Displaymanager(   97): [operateIfaceEnable] property 0 iface 4 operate 1 value 1
09-06 19:21:43.438 W/Displaymanager(   97): interface 4 not support led

当一切正常时，情况恰恰相反-请参见上面的日志。

我们的假设是黑屏可能是由于我们请求视频流时HDMI服务还没有启动。

我们已尝试通过所有这些方法检测HDMI连接（当HDMI连接/启动时，我们开始播放视频）- 如何在Android中检查HDMI设备连接状态？，但没有任何帮助。

Android版本17。

有什么想法会导致这个问题吗？

UPD1：

附上相同问题的GitHub讨论。

- Aleksandr A

Answer 1

通过更新ExoPlayer到2.8.4和ExoMedia到4.2.3，问题已得到解决。

- Aleksandr A