Question

在大多数情况下，这似乎是使用系统默认设备处理的。

有没有办法像在ExoPlayer / MediaPlayer的AudioTrack.setPrerredDevice（AudioDeviceInfo info）中手动设置视频的输出设备一样？

如果没有其他选择，我可以这样做吗？

Answer 1

为了解决我的问题，我必须下载Exoplayer的源代码，并公开一种将硬件设置为正轨的方法：

DefaultAudioSink.Java

var dbTable = localStorage.getItem('dbTable');
    var ddlb = '';
    var ddlb2 = '';
    $.ajax({
        headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
        },
        url: "laporan/header",
        type: "POST",
        data: {
            table: dbTable
        },
        beforeSend: function () {
            $("#kondisiHeader").empty();
            ddlb = ddlb + '<br>Filter<br>';
            ddlb2 = ddlb2 + '<br>Filter<br>';
            ddlb = ddlb + '<div><div id="filterDiv1">';
            ddlb2 = ddlb2 + '<div><div id="filterDiv2">';                
        },
        success: function (result) {
            ddlb = ddlb + '<select name="filter1" id="kondisiSelect1">'; 
            ddlb2 = ddlb2 + '<select name="filter2" id="kondisiSelect2">'; 
            $.each(result, function (e, item) {               
            ddlb = ddlb + '<option value="' + item.column_name + '">' + item.column_name + '</option>';
            ddlb2 = ddlb2 + '<option value="' + item.column_name + '">' + item.column_name + '</option>';
            });
            ddlb = ddlb + '</select>';
            ddlb2 = ddlb2 + '</select>';
            ddlb = ddlb + '<select name="kondisi1" id="kondisi1">';
            ddlb2 = ddlb2 + '<select name="kondisi2" id="kondisi2">';
            ddlb = ddlb + '<option value="like">like</option>';
            ddlb2 = ddlb2 + '<option value="like">like</option>';
            ddlb = ddlb + '<option value="=">=</option>';
            ddlb2 = ddlb2 + '<option value="=">=</option>';
            ddlb = ddlb + '<option value="!=">!=</option>';
            ddlb2 = ddlb2 + '<option value="!=">!=</option>';
            ddlb = ddlb + '<option value=">">></option>';
            ddlb2 = ddlb2 + '<option value=">">></option>';
            ddlb = ddlb + '<option value="<"><</option>';
            ddlb2 = ddlb2 + '<option value="<"><</option>';
            ddlb = ddlb + '</select>';
            ddlb2 = ddlb2 + '</select>';               
            ddlb = ddlb + '<input type="text" name="valueKondisi1">';
            ddlb2 = ddlb2 + '<input type="text" name="valueKondisi2">';
            ddlb = ddlb + '<select name="kondisiAndOr1" id="andKondisi1">';
            ddlb2 = ddlb2 + '<select name="kondisiAndOr2" id="andKondisi2">';
            ddlb = ddlb + '<option value="">-</option>';
            ddlb2 = ddlb2 + '<option value="">-</option>';
            ddlb = ddlb + '<option value="and">AND</option>';
            ddlb2 = ddlb2 + '<option value="and">AND</option>';
            ddlb = ddlb + '<option value="or">OR</option>';
            ddlb2 = ddlb2 + '<option value="or">OR</option>';
            ddlb = ddlb + '</select>';
            ddlb2 = ddlb2 + '</select>';
            ddlb = ddlb + '</div>';
            ddlb2 = ddlb2 + '</div>';
            ddlb = ddlb + '<div id="kondisiHeader2"></div></div>';
            ddlb2 = ddlb2 + '<div id="kondisiHeader2"></div></div>';
            block_to_insert = document.createElement('div');
            block_to_insert.innerHTML = ddlb;
            container_block = document.getElementById('kondisiHeader');
            container_block.appendChild( block_to_insert );
            localStorage.setItem('ddlb2', ddlb2);
            localStorage.setItem('dbTable', dbTable);       
        } 
    });
});

$("#kondisiHeader").on('change', function (e) {
    var ddlb2 = localStorage.getItem('ddlb2');
    block_to_insert2 = document.createElement('div');
    block_to_insert2.innerHTML = ddlb2;
    container_block2 = document.getElementById('kondisiHeader2');
    container_block2.appendChild( block_to_insert2 );

});

内部if语句已添加到上述代码中。

AudioAttributes.Java

private AudioTrack initializeAudioTrack() throws InitializationException {
AudioTrack audioTrack;
if (Util.SDK_INT >= 21) {
  audioTrack = createAudioTrackV21();
  if (audioAttributes.device != null && Util.SDK_INT >= 23) {
    audioTrack.setPreferredDevice(audioAttributes.device);
  }
}

这添加了一个公共生成器元素，以允许在AudioAttributes上设置首选设备。

public Builder setPreferredDevice(AudioDeviceInfo device) {
  this.playbackDevice = device;
  return this;
}

public AudioAttributes build() {
  return new AudioAttributes(contentType, flags, usage, playbackDevice);
}

已将AudioDeviceInfo变量添加到AudioAttributes构造函数。

public AudioDeviceInfo device;
private @Nullable android.media.AudioAttributes audioAttributesV21;
private android.media.AudioAttributes audioAttributesV21;

private AudioAttributes(@C.AudioContentType int contentType, @C.AudioFlags int flags,
  @C.AudioUsage int usage) {
  @C.AudioUsage int usage, AudioDeviceInfo device) {
    this.contentType = contentType;
    this.flags = flags;
    this.usage = usage;
    this.device = device;
}

添加了源格式化检查，以等于该设备的替代：&& this.device == other.device

这使我可以编译项目，并像往常一样添加为库，但是还可以将所需的设备设置为构建器的一部分。好处是它还可以动态工作。我相信Media也可以达到同样的效果播放器

我可以在Exoplayer或MediaPlayer中设置首选的音频设备来播放视频吗？

1 个答案: