如何更改iPhone发送到蜂窝networking的语音数据？

我有这个代码，在iPhone中logging一个语音电话。 我想要的是改变到蜂窝networking的数据。 具体来说，我想我需要访问语音数据，他们是调制在DSP，并准备发送到蜂窝networking。

我想对已调制的数据应用一些stream密码。

这是正确的类寻找？ 任何build议，欢迎。

如何在iOS上录制对话/电话？

#import <AudioToolbox/AudioToolbox.h> #import <libkern/OSAtomic.h> //CoreTelephony.framework extern "C" CFStringRef const kCTCallStatusChangeNotification; extern "C" CFStringRef const kCTCallStatus; extern "C" id CTTelephonyCenterGetDefault(); extern "C" void CTTelephonyCenterAddObserver(id ct, void* observer, CFNotificationCallback callBack, CFStringRef name, void *object, CFNotificationSuspensionBehavior sb); extern "C" int CTGetCurrentCallCount(); enum { kCTCallStatusActive = 1, kCTCallStatusHeld = 2, kCTCallStatusOutgoing = 3, kCTCallStatusIncoming = 4, kCTCallStatusHanged = 5 }; NSString* kMicFilePath = @"/var/mobile/Media/DCIM/mic.caf"; NSString* kSpeakerFilePath = @"/var/mobile/Media/DCIM/speaker.caf"; NSString* kResultFilePath = @"/var/mobile/Media/DCIM/result.m4a"; OSSpinLock phoneCallIsActiveLock = 0; OSSpinLock speakerLock = 0; OSSpinLock micLock = 0; ExtAudioFileRef micFile = NULL; ExtAudioFileRef speakerFile = NULL; BOOL phoneCallIsActive = NO; void Convert() { //File URLs CFURLRef micUrl = CFURLCreateWithFileSystemPath(NULL, (CFStringRef)kMicFilePath, kCFURLPOSIXPathStyle, false); CFURLRef speakerUrl = CFURLCreateWithFileSystemPath(NULL, (CFStringRef)kSpeakerFilePath, kCFURLPOSIXPathStyle, false); CFURLRef mixUrl = CFURLCreateWithFileSystemPath(NULL, (CFStringRef)kResultFilePath, kCFURLPOSIXPathStyle, false); ExtAudioFileRef micFile = NULL; ExtAudioFileRef speakerFile = NULL; ExtAudioFileRef mixFile = NULL; //Opening input files (speaker and mic) ExtAudioFileOpenURL(micUrl, &micFile); ExtAudioFileOpenURL(speakerUrl, &speakerFile); //Reading input file audio format (mono LPCM) AudioStreamBasicDescription inputFormat, outputFormat; UInt32 descSize = sizeof(inputFormat); ExtAudioFileGetProperty(micFile, kExtAudioFileProperty_FileDataFormat, &descSize, &inputFormat); int sampleSize = inputFormat.mBytesPerFrame; //Filling input stream format for output file (stereo LPCM) FillOutASBDForLPCM(inputFormat, inputFormat.mSampleRate, 2, inputFormat.mBitsPerChannel, inputFormat.mBitsPerChannel, true, false, false); //Filling output file audio format (AAC) memset(&outputFormat, 0, sizeof(outputFormat)); outputFormat.mFormatID = kAudioFormatMPEG4AAC; outputFormat.mSampleRate = 8000; outputFormat.mFormatFlags = kMPEG4Object_AAC_Main; outputFormat.mChannelsPerFrame = 2; //Opening output file ExtAudioFileCreateWithURL(mixUrl, kAudioFileM4AType, &outputFormat, NULL, kAudioFileFlags_EraseFile, &mixFile); ExtAudioFileSetProperty(mixFile, kExtAudioFileProperty_ClientDataFormat, sizeof(inputFormat), &inputFormat); //Freeing URLs CFRelease(micUrl); CFRelease(speakerUrl); CFRelease(mixUrl); //Setting up audio buffers int bufferSizeInSamples = 64 * 1024; AudioBufferList micBuffer; micBuffer.mNumberBuffers = 1; micBuffer.mBuffers[0].mNumberChannels = 1; micBuffer.mBuffers[0].mDataByteSize = sampleSize * bufferSizeInSamples; micBuffer.mBuffers[0].mData = malloc(micBuffer.mBuffers[0].mDataByteSize); AudioBufferList speakerBuffer; speakerBuffer.mNumberBuffers = 1; speakerBuffer.mBuffers[0].mNumberChannels = 1; speakerBuffer.mBuffers[0].mDataByteSize = sampleSize * bufferSizeInSamples; speakerBuffer.mBuffers[0].mData = malloc(speakerBuffer.mBuffers[0].mDataByteSize); AudioBufferList mixBuffer; mixBuffer.mNumberBuffers = 1; mixBuffer.mBuffers[0].mNumberChannels = 2; mixBuffer.mBuffers[0].mDataByteSize = sampleSize * bufferSizeInSamples * 2; mixBuffer.mBuffers[0].mData = malloc(mixBuffer.mBuffers[0].mDataByteSize); //Converting while (true) { //Reading data from input files UInt32 framesToRead = bufferSizeInSamples; ExtAudioFileRead(micFile, &framesToRead, &micBuffer); ExtAudioFileRead(speakerFile, &framesToRead, &speakerBuffer); if (framesToRead == 0) { break; } //Building interleaved stereo buffer - left channel is mic, right - speaker for (int i = 0; i < framesToRead; i++) { memcpy((char*)mixBuffer.mBuffers[0].mData + i * sampleSize * 2, (char*)micBuffer.mBuffers[0].mData + i * sampleSize, sampleSize); memcpy((char*)mixBuffer.mBuffers[0].mData + i * sampleSize * 2 + sampleSize, (char*)speakerBuffer.mBuffers[0].mData + i * sampleSize, sampleSize); } //Writing to output file - LPCM will be converted to AAC ExtAudioFileWrite(mixFile, framesToRead, &mixBuffer); } //Closing files ExtAudioFileDispose(micFile); ExtAudioFileDispose(speakerFile); ExtAudioFileDispose(mixFile); //Freeing audio buffers free(micBuffer.mBuffers[0].mData); free(speakerBuffer.mBuffers[0].mData); free(mixBuffer.mBuffers[0].mData); } void Cleanup() { [[NSFileManager defaultManager] removeItemAtPath:kMicFilePath error:NULL]; [[NSFileManager defaultManager] removeItemAtPath:kSpeakerFilePath error:NULL]; } void CoreTelephonyNotificationCallback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) { NSDictionary* data = (NSDictionary*)userInfo; if ([(NSString*)name isEqualToString:(NSString*)kCTCallStatusChangeNotification]) { int currentCallStatus = [data[(NSString*)kCTCallStatus] integerValue]; if (currentCallStatus == kCTCallStatusOutgoing || currentCallStatus == kCTCallStatusActive) { OSSpinLockLock(&phoneCallIsActiveLock); phoneCallIsActive = YES; OSSpinLockUnlock(&phoneCallIsActiveLock); } else if (currentCallStatus == kCTCallStatusHanged) { if (CTGetCurrentCallCount() > 0) { return; } OSSpinLockLock(&phoneCallIsActiveLock); phoneCallIsActive = NO; OSSpinLockUnlock(&phoneCallIsActiveLock); //Closing mic file OSSpinLockLock(&micLock); if (micFile != NULL) { ExtAudioFileDispose(micFile); } micFile = NULL; OSSpinLockUnlock(&micLock); //Closing speaker file OSSpinLockLock(&speakerLock); if (speakerFile != NULL) { ExtAudioFileDispose(speakerFile); } speakerFile = NULL; OSSpinLockUnlock(&speakerLock); Convert(); Cleanup(); } } } OSStatus(*AudioUnitProcess_orig)(AudioUnit unit, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inNumberFrames, AudioBufferList *ioData); OSStatus AudioUnitProcess_hook(AudioUnit unit, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inNumberFrames, AudioBufferList *ioData) { OSSpinLockLock(&phoneCallIsActiveLock); if (phoneCallIsActive == NO) { OSSpinLockUnlock(&phoneCallIsActiveLock); return AudioUnitProcess_orig(unit, ioActionFlags, inTimeStamp, inNumberFrames, ioData); } OSSpinLockUnlock(&phoneCallIsActiveLock); ExtAudioFileRef* currentFile = NULL; OSSpinLock* currentLock = NULL; AudioComponentDescription unitDescription = {0}; AudioComponentGetDescription(AudioComponentInstanceGetComponent(unit), &unitDescription); //'agcc', 'mbdp' - iPhone 4S, iPhone 5 //'agc2', 'vrq2' - iPhone 5C, iPhone 5S if (unitDescription.componentSubType == 'agcc' || unitDescription.componentSubType == 'agc2') { currentFile = &micFile; currentLock = &micLock; } else if (unitDescription.componentSubType == 'mbdp' || unitDescription.componentSubType == 'vrq2') { currentFile = &speakerFile; currentLock = &speakerLock; } if (currentFile != NULL) { OSSpinLockLock(currentLock); //Opening file if (*currentFile == NULL) { //Obtaining input audio format AudioStreamBasicDescription desc; UInt32 descSize = sizeof(desc); AudioUnitGetProperty(unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &desc, &descSize); //Opening audio file CFURLRef url = CFURLCreateWithFileSystemPath(NULL, (CFStringRef)((currentFile == &micFile) ? kMicFilePath : kSpeakerFilePath), kCFURLPOSIXPathStyle, false); ExtAudioFileRef audioFile = NULL; OSStatus result = ExtAudioFileCreateWithURL(url, kAudioFileCAFType, &desc, NULL, kAudioFileFlags_EraseFile, &audioFile); if (result != 0) { *currentFile = NULL; } else { *currentFile = audioFile; //Writing audio format ExtAudioFileSetProperty(*currentFile, kExtAudioFileProperty_ClientDataFormat, sizeof(desc), &desc); } CFRelease(url); } else { //Writing audio buffer ExtAudioFileWrite(*currentFile, inNumberFrames, ioData); } OSSpinLockUnlock(currentLock); } return AudioUnitProcess_orig(unit, ioActionFlags, inTimeStamp, inNumberFrames, ioData); } __attribute__((constructor)) static void initialize() { CTTelephonyCenterAddObserver(CTTelephonyCenterGetDefault(), NULL, CoreTelephonyNotificationCallback, NULL, NULL, CFNotificationSuspensionBehaviorHold); MSHookFunction(AudioUnitProcess, AudioUnitProcess_hook, &AudioUnitProcess_orig); }