小编rop*_*cks的帖子

我写了一个循环来使用扩展音频文件服务将我的应用程序生成的pcm音频数据编码到aac.编码同步地在后台线程中进行,而不是实时进行.

对于ios 4和i,ipad 1和iphone 3gs/4的编码完美无缺.然而,对于双核设备(iphone 4s,ipad 2),第三次调用ExtAudioFileWrite会使编码线程崩溃,没有堆栈跟踪,也没有错误代码.

这是有问题的代码:

数据格式

AudioStreamBasicDescription AUCanonicalASBD(Float64 sampleRate, 
                                        UInt32 channel){
AudioStreamBasicDescription audioFormat;
audioFormat.mSampleRate         = sampleRate;
audioFormat.mFormatID           = kAudioFormatLinearPCM;
audioFormat.mFormatFlags        = kAudioFormatFlagsAudioUnitCanonical;
audioFormat.mChannelsPerFrame   = channel;
audioFormat.mBytesPerPacket     = sizeof(AudioUnitSampleType);
audioFormat.mBytesPerFrame      = sizeof(AudioUnitSampleType);
audioFormat.mFramesPerPacket    = 1;
audioFormat.mBitsPerChannel     = 8 * sizeof(AudioUnitSampleType);
audioFormat.mReserved           = 0;
return audioFormat;
}

AudioStreamBasicDescription MixdownAAC(void){
AudioStreamBasicDescription audioFormat;
audioFormat.mSampleRate         = 44100.0;
audioFormat.mFormatID           = kAudioFormatMPEG4AAC;
audioFormat.mFormatFlags        = kMPEG4Object_AAC_Main;
audioFormat.mChannelsPerFrame   = 2;
audioFormat.mBytesPerPacket     = 0;
audioFormat.mBytesPerFrame      = 0;
audioFormat.mFramesPerPacket    = 1024;
audioFormat.mBitsPerChannel     = 0;
audioFormat.mReserved           = 0;
return …

我正在尝试更新我的项目以使用CocoaPods 0.36.0的新use_frameworks!选项.我在Xcode 6.2中使用Objective-C(不是Swift),部署目标是8.1.

除Google Analytics之外,所有内容都正在构建和正确链接,我收到链接器错误:

Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_GAI", referenced from: objc-class-ref in NPDAnalytics.o "_OBJC_CLASS_$_GAIDictionaryBuilder", referenced from: objc-class-ref in NPDAnalytics.o ld: symbol(s) not found for architecture x86_64

我试过改变我的旧式

#import <GoogleAnalytics_iOS_SDK/GAI.h>

到模块导入:

@import GoogleAnalytics_iOS_SDK;

但这没有任何帮助.

GAI是否与CocoaPods的动态框架实现不兼容,还是有其他一些技巧可以让它发挥作用？