iOS: Force audio output to speakers while headphones are plugged in

iOS: Force audio output to speakers while headphones are plugged in 
After much searching through Apple documentation and scarce examples of what I wanted to do, I came up with the following code. A client wanted to play audio through the iPhone/iPad speakers while a microphone was plugged in. While this solution can't do both at the same time, it will let you switch back and forth between playing sounds through the speakers, then record through a microphone or a headset, without unplugging anything. It will also default to use the internal microphone and speakers if nothing is plugged in. Note that by calling the setup method, audio output will initially be forced through the speakers, rather than the headphones, if plugged in. Hopefully this code helps someone facing similar issues.

AudioRouter.h

  1. @interface AudioRouter : NSObject
  2. + (void) initAudioSessionRouting;
  3. + (void) switchToDefaultHardware;
  4. + (void) forceOutputToBuiltInSpeakers;
  5. @end

AudioRouter.m

  1. #import "AudioRouter.h"
  2. #import <AudioToolbox/AudioToolbox.h>
  3. #import <AVFoundation/AVFoundation.h>
  4. @implementation AudioRouter
  5. #define IS_DEBUGGING NO
  6. #define IS_DEBUGGING_EXTRA_INFO NO
  7. + (void) initAudioSessionRouting {
  8. // Called once to route all audio through speakers, even if something's plugged into the headphone jack
  9. static BOOL audioSessionSetup = NO;
  10. if (audioSessionSetup == NO) {
  11. // set category to accept properties assigned below
  12. NSError *sessionError = nil;
  13. [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker error: &sessionError];
  14. // Doubly force audio to come out of speaker
  15. UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
  16. AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);
  17. // fix issue with audio interrupting video recording - allow audio to mix on top of other media
  18. UInt32 doSetProperty = 1;
  19. AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty);
  20. // set active
  21. [[AVAudioSession sharedInstance] setDelegate:self];
  22. [[AVAudioSession sharedInstance] setActive: YES error: nil];
  23. // add listener for audio input changes
  24. AudioSessionAddPropertyListener (kAudioSessionProperty_AudioRouteChange, onAudioRouteChange, nil );
  25. AudioSessionAddPropertyListener (kAudioSessionProperty_AudioInputAvailable, onAudioRouteChange, nil );
  26. }
  27. // Force audio to come out of speaker
  28. [[AVAudioSession sharedInstance] overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:nil];
  29. // set flag
  30. audioSessionSetup = YES;
  31. }
  32. + (void) switchToDefaultHardware {
  33. // Remove forcing to built-in speaker
  34. UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_None;
  35. AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);
  36. }
  37. + (void) forceOutputToBuiltInSpeakers {
  38. // Re-force audio to come out of speaker
  39. UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
  40. AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);
  41. }
  42. void onAudioRouteChange (void* clientData, AudioSessionPropertyID inID, UInt32 dataSize, const void* inData) {
  43. if( IS_DEBUGGING == YES ) {
  44. NSLog(@"==== Audio Harware Status ====");
  45. NSLog(@"Current Input: %@", [AudioRouter getAudioSessionInput]);
  46. NSLog(@"Current Output: %@", [AudioRouter getAudioSessionOutput]);
  47. NSLog(@"Current hardware route: %@", [AudioRouter getAudioSessionRoute]);
  48. NSLog(@"==============================");
  49. }
  50. if( IS_DEBUGGING_EXTRA_INFO == YES ) {
  51. NSLog(@"==== Audio Harware Status (EXTENDED) ====");
  52. CFDictionaryRef dict = (CFDictionaryRef)inData;
  53. CFNumberRef reason = CFDictionaryGetValue(dict, kAudioSession_RouteChangeKey_Reason);
  54. CFDictionaryRef oldRoute = CFDictionaryGetValue(dict, kAudioSession_AudioRouteChangeKey_PreviousRouteDescription);
  55. CFDictionaryRef newRoute = CFDictionaryGetValue(dict, kAudioSession_AudioRouteChangeKey_CurrentRouteDescription);
  56. NSLog(@"Audio old route: %@", oldRoute);
  57. NSLog(@"Audio new route: %@", newRoute);
  58. NSLog(@"=========================================");
  59. }
  60. }
  61. + (NSString*) getAudioSessionInput {
  62. UInt32 routeSize;
  63. AudioSessionGetPropertySize(kAudioSessionProperty_AudioRouteDescription, &routeSize);
  64. CFDictionaryRef desc; // this is the dictionary to contain descriptions
  65. // make the call to get the audio description and populate the desc dictionary
  66. AudioSessionGetProperty (kAudioSessionProperty_AudioRouteDescription, &routeSize, &desc);
  67. // the dictionary contains 2 keys, for input and output. Get output array
  68. CFArrayRef outputs = CFDictionaryGetValue(desc, kAudioSession_AudioRouteKey_Inputs);
  69. // the output array contains 1 element - a dictionary
  70. CFDictionaryRef diction = CFArrayGetValueAtIndex(outputs, 0);
  71. // get the output description from the dictionary
  72. CFStringRef input = CFDictionaryGetValue(diction, kAudioSession_AudioRouteKey_Type);
  73. return [NSString stringWithFormat:@"%@", input];
  74. }
  75. + (NSString*) getAudioSessionOutput {
  76. UInt32 routeSize;
  77. AudioSessionGetPropertySize(kAudioSessionProperty_AudioRouteDescription, &routeSize);
  78. CFDictionaryRef desc; // this is the dictionary to contain descriptions
  79. // make the call to get the audio description and populate the desc dictionary
  80. AudioSessionGetProperty (kAudioSessionProperty_AudioRouteDescription, &routeSize, &desc);
  81. // the dictionary contains 2 keys, for input and output. Get output array
  82. CFArrayRef outputs = CFDictionaryGetValue(desc, kAudioSession_AudioRouteKey_Outputs);
  83. // the output array contains 1 element - a dictionary
  84. CFDictionaryRef diction = CFArrayGetValueAtIndex(outputs, 0);
  85. // get the output description from the dictionary
  86. CFStringRef output = CFDictionaryGetValue(diction, kAudioSession_AudioRouteKey_Type);
  87. return [NSString stringWithFormat:@"%@", output];
  88. }
  89. + (NSString*) getAudioSessionRoute {
  90. /*
  91. returns the current session route:
  92. * ReceiverAndMicrophone
  93. * HeadsetInOut
  94. * Headset
  95. * HeadphonesAndMicrophone
  96. * Headphone
  97. * SpeakerAndMicrophone
  98. * Speaker
  99. * HeadsetBT
  100. * LineInOut
  101. * Lineout
  102. * Default
  103. */
  104. UInt32 rSize = sizeof (CFStringRef);
  105. CFStringRef route;
  106. AudioSessionGetProperty (kAudioSessionProperty_AudioRoute, &rSize, &route);
  107. if (route == NULL) {
  108. NSLog(@"Silent switch is currently on");
  109. return @"None";
  110. }
  111. return [NSString stringWithFormat:@"%@", route];
  112. }
  113. @end
<think>好的,我现在需要解决用户提到的缺少stepAudioTTS模块的问题,可能需要安装或配置Step-Audio-speakers相关依赖。首先,我应该回顾用户提供的引用内容,看看有没有相关的安装或配置指南。 用户引用了[^1]和[^2],其中[^1]是关于ComfyUI_StepAudioTTS的项目,而[^2]是Step-Audio的教程。用户的问题集中在安装这两个模块上,尤其是Step-Audio-speakers的依赖。 首先,我应该检查ComfyUI_StepAudioTTS的安装步骤。根据引用[^1],项目地址是gitcode.com的镜像,可能需要克隆仓库并安装依赖。常见的做法是使用git clone和pip安装requirements.txt中的包。此外,用户可能需要安装PyTorch,特别是GPU版本,如果有CUDA支持的话。 接下来是Step-Audio-speakers的依赖。引用[^2]提到Step-Audio是一个多模态模型,可能需要额外安装FFmpeg处理音频,以及PortAudio库。用户可能需要通过apt-get安装这些系统依赖,或者使用conda环境管理。 另外,用户的问题可能涉及到环境配置,比如Python版本、虚拟环境的使用,以及权限问题。比如,安装系统包可能需要sudo权限,而pip安装可能需要--user选项。 还需要考虑依赖冲突的可能性,建议用户使用虚拟环境,如venv或conda,来隔离项目环境。同时,检查是否有特定版本的库需要安装,比如torchaudio等。 用户可能遇到的常见问题包括:克隆仓库失败、依赖安装错误、缺少系统库、CUDA版本不匹配等。需要提供相应的解决建议,如换源、更新驱动、安装构建工具等。 最后,根据引用[^4],语音处理可能涉及多个模型流水线,用户可能需要确保整个流程的各个模块正确安装和配置,包括音频输入输出设备,这可能涉及到引用[^3]中的虚拟音频设备设置,但用户当前的问题主要集中在Step-Audio相关模块,所以可能暂时不需要深入Virtual-Audio-Pipeline,除非遇到音频设备问题。 总结步骤:安装ComfyUI_StepAudioTTS,处理其依赖,安装Step-Audio-speakers的系统及Python依赖,处理可能的常见错误,并建议环境配置和验证方法。</think>根据引用[1]和[2]的项目文档,以下是安装配置步骤: ### 一、安装ComfyUI_StepAudioTTS模块 1. **克隆仓库** ```bash git clone https://gitcode.com/gh_mirrors/co/ComfyUI_StepAudioTTS cd ComfyUI_StepAudioTTS ``` 2. **安装Python依赖** ```bash pip install -r requirements.txt # 若需GPU加速需安装对应版本PyTorch pip install torch torchaudio --extra-index-url https://download.pytorch.org/whl/cu118 ``` 3. **配置语音模型权重** 需下载`step_audio_tts.pth`预训练模型,放置到`models/`目录下 ### 二、配置Step-Audio-speakers依赖 1. **安装系统级依赖** ```bash sudo apt-get install ffmpeg portaudio19-dev espeak ``` 2. **安装Python语音处理库** ```bash pip install step-audio-speakers==0.9.3 sounddevice==0.4.6 ``` 3. **验证音频设备** ```bash python -c "import sounddevice; print(sounddevice.query_devices())" # 若显示无设备需配置虚拟声卡(参考引用[3]) ``` ### 三、常见问题解决 1. **CUDA版本不匹配** ```bash nvidia-smi # 查看CUDA版本 pip uninstall torch pip install torch==2.1.0+cu118 --extra-index-url https://download.pytorch.org/whl/cu118 ``` 2. **缺少libsndfile依赖** ```bash sudo apt-get install libsndfile1-dev ``` 3. **中文语音支持** 需下载额外语音包: ```bash wget https://step-audio.oss-cn-beijing.aliyuncs.com/zh-CN-voicepack.tar.gz tar -xzf zh-CN-voicepack.tar.gz -C ~/.step_audio ```
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值