Android强制HDMI音频 [英] Android force HDMI audio

问题描述

我的ADT-1连接到电视后，无法通过HDMI播放声音.

My ADT-1 does not play sound over HDMI when connected to the TV.

在那台特定的电视上，我不得不在Raspberry PI上强制使用HDMI音频，因此我也试图在ADT-1上强制使用它.

On that specific TV I had to force HDMI audio on the Raspberry PI, so I'm trying to force it on the ADT-1 as well.

我尝试在获得许可的情况下制作应用

I tried making an app with the permission

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

并使用AudioManager实例更改设置

And using an AudioManager instance to change the settings

AudioManager manager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);    
Log.d(TAG, "ATTACHED: " + manager.getParameters("attached_output_devices"));
Log.d(TAG, "DEFAULT: " + manager.getParameters("default_output_device"));
Log.d(TAG, "PRE: " + manager.getParameters("audio_devices_out_active"));       
manager.setParameters("audio_devices_out_active=AUDIO_DEVICE_OUT_AUX_DIGITAL");
Log.d(TAG, "POST: " + manager.getParameters("audio_devices_out_active"));

但是所有日志都返回为空，并且音频没有变化.

but all the logs are returning empty, and there's no change in the audio.

ATTACHED: attached_output_devices=
DEFAULT: default_output_device=
PRE: audio_devices_out_active=
POST: audio_devices_out_active=

我从TIF(电视输入框架)中了解了电视音频以及设置音频补丁的可能性，但我认为情况并非如此，这似乎更多是由于电视仅被视为HDMI监视器而没有音频功能.

I read about TV Audio from the TIF (TV Input Framework) and the possibility to set audio patches, but I don't think that's the case, this seems more due to the TV being seen only as an HDMI monitor with no audio capabilities.

文件/etc/audio_policy.conf显示:

the file /etc/audio_policy.conf shows:

global_configuration{
 attached_output_devices AUDIO_DEVICE_OUT_SPEAKER
 default_output_device AUDIO_DEVICE_OUT_SPEAKER
 ...
}

audio_hw_modules {
 outputs{
  primary{
   ...
   devices AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_AUX_DIGITAL
   flags AUDIO_OUTPUT_FLAG_PRIMARY
  }
 }
}

其中AUDIO_DEVICE_OUT_AUX_DIGITAL是HDMI.

Where AUDIO_DEVICE_OUT_AUX_DIGITAL is the HDMI.

关于如何强制ADT-1在HDMI上输出音频的任何想法吗?

Any idea on how to force ADT-1 to output audio on HDMI?

推荐答案

使用

    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

在您的清单中

    audioManager = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE);
    audioManager.setParameters("audio_devices_out_active=AUDIO_CODEC");
    // or 
    audioManager.setParameters("audio_devices_out_active=AUDIO_HDMI");
    // or 
    audioManager.setParameters("audio_devices_out_active=AUDIO_HDMI,AUDIO_CODEC");

在您的代码中

设置有效音频输出

in your code for setting the active audio output

这篇关于Android强制HDMI音频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！