我需要将音频从麦克风传输到http服务器 这些录音设置是我需要的：
NSDictionary *audioOutputSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt: kAudioFormatULaw],AVFormatIDKey,
[NSNumber numberWithFloat:8000.0],AVSampleRateKey,//was 44100.0
[NSData dataWithBytes: &acl length: sizeof( AudioChannelLayout ) ], AVChannelLayoutKey,
[NSNumber numberWithInt:1],AVNumberOfChannelsKey,
[NSNumber numberWithInt:64000],AVEncoderBitRateKey,
nil];
API im编码状态：
向当前查看的相机发送连续的音频流。 音频需要以64 kbit / s的G711 mu-law进行编码以便传输到 床边的Axis相机。发送（这应该是SSL中的POST URL 连接服务器）：POST / transmitaudio？id = 内容类型：audio / basic内容长度：99999（长度被忽略）
以下是我尝试使用的链接列表。
LINK - （SO）基本解释，只有音频单元和音频队列在通过麦克风录音时才允许nsdata作为输出不是一个例子，而是对所需内容（音频队列或音频单元）的良好定义
LINK - （SO）音频回调示例| 仅包含回调
LINK - （SO）REMOTE IO示例| 没有启动/停止，用于保存到文件
LINK - （SO）REMOTE IO示例| 无法回答
LINK - （SO）基本录音示例| 好的例子，但记录到文件
LINK - （SO）引导我进入InMemoryAudioFile类的问题（无法开始工作） 跟随到inMemoryFile（或类似的东西）的链接，但无法使其正常工作。
LINK - （SO）更多音频单元和远程io示例/问题| 让这一个工作，但再一次没有停止功能，即使我试图弄清楚呼叫是什么并使其停止，它仍然似乎没有将音频传输到服务器。
LINK - 体面的remoteIO和音频队列示例，但是| 另一个很好的例子，几乎让它工作但是代码有些问题（编译器认为它不是obj-c ++）而且再一次不知道如何从它而不是文件中获取音频“数据”。
LINK - Apple docs for audio queue | 有框架问题。通过它（见下面的问题），但最终无法使它工作，但可能没有给这个与其他人一样多的时间，也许应该有。
LINK - （SO）在尝试实现音频队列/单元时遇到的问题不是示例
LINK - （SO）另一个remoteIO示例| 另一个很好的例子，但无法弄清楚如何将其转换为数据而不是文件。
LINK - 看起来也很有趣，循环缓冲区| 无法弄清楚如何将其与音频回调相结合
这是我当前正在尝试传输的课程。这似乎有效，尽管接收器端（连接到服务器）的扬声器有静电。这似乎表明音频数据格式存在问题。
IOS VERSION（减去GCD套接字的委托方法）：
@implementation MicCommunicator {
AVAssetWriter * assetWriter;
AVAssetWriterInput * assetWriterInput;
}
@synthesize captureSession = _captureSession;
@synthesize output = _output;
@synthesize restClient = _restClient;
@synthesize uploadAudio = _uploadAudio;
@synthesize outputPath = _outputPath;
@synthesize sendStream = _sendStream;
@synthesize receiveStream = _receiveStream;
@synthesize socket = _socket;
@synthesize isSocketConnected = _isSocketConnected;
-(id)init {
if ((self = [super init])) {
_receiveStream = [[NSStream alloc]init];
_sendStream = [[NSStream alloc]init];
_socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
_isSocketConnected = FALSE;
_restClient = [RestClient sharedManager];
_uploadAudio = false;
NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
_outputPath = [NSURL fileURLWithPath:[[searchPaths objectAtIndex:0] stringByAppendingPathComponent:@"micOutput.output"]];
NSError * assetError;
AudioChannelLayout acl;
bzero(&acl, sizeof(acl));
acl.mChannelLayoutTag = kAudioChannelLayoutTag_Mono; //kAudioChannelLayoutTag_Stereo;
NSDictionary *audioOutputSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt: kAudioFormatULaw],AVFormatIDKey,
[NSNumber numberWithFloat:8000.0],AVSampleRateKey,//was 44100.0
[NSData dataWithBytes: &acl length: sizeof( AudioChannelLayout ) ], AVChannelLayoutKey,
[NSNumber numberWithInt:1],AVNumberOfChannelsKey,
[NSNumber numberWithInt:64000],AVEncoderBitRateKey,
nil];
assetWriterInput = [[AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioOutputSettings]retain];
[assetWriterInput setExpectsMediaDataInRealTime:YES];
assetWriter = [[AVAssetWriter assetWriterWithURL:_outputPath fileType:AVFileTypeWAVE error:&assetError]retain]; //AVFileTypeAppleM4A
if (assetError) {
NSLog (@"error initing mic: %@", assetError);
return nil;
}
if ([assetWriter canAddInput:assetWriterInput]) {
[assetWriter addInput:assetWriterInput];
} else {
NSLog (@"can't add asset writer input...!");
return nil;
}
}
return self;
}
-(void)dealloc {
[_output release];
[_captureSession release];
[_captureSession release];
[assetWriter release];
[assetWriterInput release];
[super dealloc];
}
-(void)beginStreaming {
NSLog(@"avassetwrter class is %@",NSStringFromClass([assetWriter class]));
self.captureSession = [[AVCaptureSession alloc] init];
AVCaptureDevice *audioCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
NSError *error = nil;
AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioCaptureDevice error:&error];
if (audioInput)
[self.captureSession addInput:audioInput];
else {
NSLog(@"No audio input found.");
return;
}
self.output = [[AVCaptureAudioDataOutput alloc] init];
dispatch_queue_t outputQueue = dispatch_queue_create("micOutputDispatchQueue", NULL);
[self.output setSampleBufferDelegate:self queue:outputQueue];
dispatch_release(outputQueue);
self.uploadAudio = FALSE;
[self.captureSession addOutput:self.output];
[assetWriter startWriting];
[self.captureSession startRunning];
}
-(void)pauseStreaming
{
self.uploadAudio = FALSE;
}
-(void)resumeStreaming
{
self.uploadAudio = TRUE;
}
-(void)finishAudioWork
{
[self dealloc];
}
-(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
AudioBufferList audioBufferList;
NSMutableData *data= [[NSMutableData alloc] init];
CMBlockBufferRef blockBuffer;
CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer(sampleBuffer, NULL, &audioBufferList, sizeof(audioBufferList), NULL, NULL, 0, &blockBuffer);
for (int y = 0; y < audioBufferList.mNumberBuffers; y++) {
AudioBuffer audioBuffer = audioBufferList.mBuffers[y];
Float32 *frame = (Float32*)audioBuffer.mData;
[data appendBytes:frame length:audioBuffer.mDataByteSize];
}
// append [data bytes] to your NSOutputStream
// These two lines write to disk, you may not need this, just providing an example
[assetWriter startSessionAtSourceTime:CMSampleBufferGetPresentationTimeStamp(sampleBuffer)];
[assetWriterInput appendSampleBuffer:sampleBuffer];
//start upload audio data
if (self.uploadAudio) {
if (!self.isSocketConnected) {
[self connect];
}
NSString *requestStr = [NSString stringWithFormat:@"POST /transmitaudio?id=%@ HTTP/1.0\r\n\r\n",self.restClient.sessionId];
NSData *requestData = [requestStr dataUsingEncoding:NSUTF8StringEncoding];
[self.socket writeData:requestData withTimeout:5 tag:0];
[self.socket writeData:data withTimeout:5 tag:0];
}
//stop upload audio data
CFRelease(blockBuffer);
blockBuffer=NULL;
[data release];
}
和JAVA版本：
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder.AudioSource;
import android.util.Log;
public class AudioWorker extends Thread
{
private boolean stopped = false;
private String host;
private int port;
private long id=0;
boolean run=true;
AudioRecord recorder;
//ulaw encoder stuff
private final static String TAG = "UlawEncoderInputStream";
private final static int MAX_ULAW = 8192;
private final static int SCALE_BITS = 16;
private InputStream mIn;
private int mMax = 0;
private final byte[] mBuf = new byte[1024];
private int mBufCount = 0; // should be 0 or 1
private final byte[] mOneByte = new byte[1];
////
/**
* Give the thread high priority so that it's not canceled unexpectedly, and start it
*/
public AudioWorker(String host, int port, long id)
{
this.host = host;
this.port = port;
this.id = id;
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
// start();
}
@Override
public void run()
{
Log.i("AudioWorker", "Running AudioWorker Thread");
recorder = null;
AudioTrack track = null;
short[][] buffers = new short[256][160];
int ix = 0;
/*
* Initialize buffer to hold continuously recorded AudioWorker data, start recording, and start
* playback.
*/
try
{
int N = AudioRecord.getMinBufferSize(8000,AudioFormat.CHANNEL_IN_MONO,AudioFormat.ENCODING_PCM_16BIT);
recorder = new AudioRecord(AudioSource.MIC, 8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, N*10);
track = new AudioTrack(AudioManager.STREAM_MUSIC, 8000, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT, N*10, AudioTrack.MODE_STREAM);
recorder.startRecording();
// track.play();
/*
* Loops until something outside of this thread stops it.
* Reads the data from the recorder and writes it to the AudioWorker track for playback.
*/
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
SSLSocketFactory sslFact = sc.getSocketFactory();
SSLSocket socket = (SSLSocket)sslFact.createSocket(host, port);
socket.setSoTimeout(10000);
InputStream inputStream = socket.getInputStream();
DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream));
OutputStream outputStream = socket.getOutputStream();
DataOutputStream os = new DataOutputStream(new BufferedOutputStream(outputStream));
PrintWriter socketPrinter = new PrintWriter(os);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
// socketPrinter.println("POST /transmitaudio?patient=1333369798370 HTTP/1.0");
socketPrinter.println("POST /transmitaudio?id="+id+" HTTP/1.0");
socketPrinter.println("Content-Type: audio/basic");
socketPrinter.println("Content-Length: 99999");
socketPrinter.println("Connection: Keep-Alive");
socketPrinter.println("Cache-Control: no-cache");
socketPrinter.println();
socketPrinter.flush();
while(!stopped)
{
Log.i("Map", "Writing new data to buffer");
short[] buffer = buffers[ix++ % buffers.length];
N = recorder.read(buffer,0,buffer.length);
track.write(buffer, 0, buffer.length);
byte[] bytes2 = new byte[buffer.length * 2];
ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().put(buffer);
read(bytes2, 0, bytes2.length);
os.write(bytes2,0,bytes2.length);
//
// ByteBuffer byteBuf = ByteBuffer.allocate(2*N);
// System.out.println("byteBuf length "+2*N);
// int i = 0;
// while (buffer.length > i) {
// byteBuf.putShort(buffer[i]);
// i++;
// }
// byte[] b = new byte[byteBuf.remaining()];
}
os.close();
}
catch(Throwable x)
{
Log.w("AudioWorker", "Error reading voice AudioWorker", x);
}
/*
* Frees the thread's resources after the loop completes so that it can be run again
*/
finally
{
recorder.stop();
recorder.release();
track.stop();
track.release();
}
}
/**
* Called from outside of the thread in order to stop the recording/playback loop
*/
public void close()
{
stopped = true;
}
public void resumeThread()
{
stopped = false;
run();
}
TrustManager[] trustAllCerts = new TrustManager[]{
new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(
java.security.cert.X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(
java.security.cert.X509Certificate[] chain, String authType) {
for (int j=0; j<chain.length; j++)
{
System.out.println("Client certificate information:");
System.out.println(" Subject DN: " + chain[j].getSubjectDN());
System.out.println(" Issuer DN: " + chain[j].getIssuerDN());
System.out.println(" Serial number: " + chain[j].getSerialNumber());
System.out.println("");
}
}
}
};
public static void encode(byte[] pcmBuf, int pcmOffset,
byte[] ulawBuf, int ulawOffset, int length, int max) {
// from 'ulaw' in wikipedia
// +8191 to +8159 0x80
// +8158 to +4063 in 16 intervals of 256 0x80 + interval number
// +4062 to +2015 in 16 intervals of 128 0x90 + interval number
// +2014 to +991 in 16 intervals of 64 0xA0 + interval number
// +990 to +479 in 16 intervals of 32 0xB0 + interval number
// +478 to +223 in 16 intervals of 16 0xC0 + interval number
// +222 to +95 in 16 intervals of 8 0xD0 + interval number
// +94 to +31 in 16 intervals of 4 0xE0 + interval number
// +30 to +1 in 15 intervals of 2 0xF0 + interval number
// 0 0xFF
// -1 0x7F
// -31 to -2 in 15 intervals of 2 0x70 + interval number
// -95 to -32 in 16 intervals of 4 0x60 + interval number
// -223 to -96 in 16 intervals of 8 0x50 + interval number
// -479 to -224 in 16 intervals of 16 0x40 + interval number
// -991 to -480 in 16 intervals of 32 0x30 + interval number
// -2015 to -992 in 16 intervals of 64 0x20 + interval number
// -4063 to -2016 in 16 intervals of 128 0x10 + interval number
// -8159 to -4064 in 16 intervals of 256 0x00 + interval number
// -8192 to -8160 0x00
// set scale factors
if (max <= 0) max = MAX_ULAW;
int coef = MAX_ULAW * (1 << SCALE_BITS) / max;
for (int i = 0; i < length; i++) {
int pcm = (0xff & pcmBuf[pcmOffset++]) + (pcmBuf[pcmOffset++] << 8);
pcm = (pcm * coef) >> SCALE_BITS;
int ulaw;
if (pcm >= 0) {
ulaw = pcm <= 0 ? 0xff :
pcm <= 30 ? 0xf0 + (( 30 - pcm) >> 1) :
pcm <= 94 ? 0xe0 + (( 94 - pcm) >> 2) :
pcm <= 222 ? 0xd0 + (( 222 - pcm) >> 3) :
pcm <= 478 ? 0xc0 + (( 478 - pcm) >> 4) :
pcm <= 990 ? 0xb0 + (( 990 - pcm) >> 5) :
pcm <= 2014 ? 0xa0 + ((2014 - pcm) >> 6) :
pcm <= 4062 ? 0x90 + ((4062 - pcm) >> 7) :
pcm <= 8158 ? 0x80 + ((8158 - pcm) >> 8) :
0x80;
} else {
ulaw = -1 <= pcm ? 0x7f :
-31 <= pcm ? 0x70 + ((pcm - -31) >> 1) :
-95 <= pcm ? 0x60 + ((pcm - -95) >> 2) :
-223 <= pcm ? 0x50 + ((pcm - -223) >> 3) :
-479 <= pcm ? 0x40 + ((pcm - -479) >> 4) :
-991 <= pcm ? 0x30 + ((pcm - -991) >> 5) :
-2015 <= pcm ? 0x20 + ((pcm - -2015) >> 6) :
-4063 <= pcm ? 0x10 + ((pcm - -4063) >> 7) :
-8159 <= pcm ? 0x00 + ((pcm - -8159) >> 8) :
0x00;
}
ulawBuf[ulawOffset++] = (byte)ulaw;
}
}
public static int maxAbsPcm(byte[] pcmBuf, int offset, int length) {
int max = 0;
for (int i = 0; i < length; i++) {
int pcm = (0xff & pcmBuf[offset++]) + (pcmBuf[offset++] << 8);
if (pcm < 0) pcm = -pcm;
if (pcm > max) max = pcm;
}
return max;
}
public int read(byte[] buf, int offset, int length) throws IOException {
if (recorder == null) throw new IllegalStateException("not open");
// return at least one byte, but try to fill 'length'
while (mBufCount < 2) {
int n = recorder.read(mBuf, mBufCount, Math.min(length * 2, mBuf.length - mBufCount));
if (n == -1) return -1;
mBufCount += n;
}
// compand data
int n = Math.min(mBufCount / 2, length);
encode(mBuf, 0, buf, offset, n, mMax);
// move data to bottom of mBuf
mBufCount -= n * 2;
for (int i = 0; i < mBufCount; i++) mBuf[i] = mBuf[i + n * 2];
return n;
}
}
答案 0 :(得分：3)
我在这个主题上的工作是惊人的，漫长的。我终于得到了这个工作，但它可能是黑客攻击。因此，我会在发布答案之前列出一些警告：
缓冲区之间仍然存在点击噪音
由于我在obj-c ++类中使用obj-c类的方式，我收到警告，所以有一些错误（但是我使用池的研究与释放相同，所以我不相信这很重要）：
类__NSCFString的对象0x13cd20自动释放，没有池 地方 - 只是泄漏 - 在objc_autoreleaseNoPool（）上打破调试
为了使这个工作，我必须注释掉SpeakHereController的所有AQPlayer引用（见下文），因为我无法通过任何其他方式修复错误。然而，这对我来说无关紧要，因为我只记录
所以上面的主要答案是AVAssetWriter中存在一个错误，它阻止它附加字节并写入音频数据。我终于在联系苹果支持后发现了这一点，让他们通知我这件事。据我所知，这个bug是特定于ulaw和AVAssetWriter的，虽然我已经尝试了许多其他格式来验证。
为此，唯一的另一个选择是使用AudioQueues。我曾经尝试过的东西但带来了一堆问题。最大的问题是我对obj-c ++缺乏了解。让下面的东西工作的是来自speakHere的例子，稍有变化，因此音频是ulaw格式的。其他问题是试图让所有文件都能很好地发挥作用。但是，通过将链中的所有文件名更改为.mm，可以轻松解决此问题。下一个问题是尝试和谐地使用这些类。这仍然是WIP，并且与警告编号2相关。但我的基本解决方案是使用SpeakHereController（也包括在speakhere示例中）而不是直接访问AQRecorder。
无论如何这里是代码：
使用obj-c类的SpeakHereController
·H
@property(nonatomic,strong) SpeakHereController * recorder;
.mm
[init method]
//AQRecorder wrapper (SpeakHereController) allocation
_recorder = [[SpeakHereController alloc]init];
//AQRecorder wrapper (SpeakHereController) initialization
//technically this class is a controller and thats why its init method is awakeFromNib
[_recorder awakeFromNib];
[recording]
bool buttonState = self.audioRecord.isSelected;
[self.audioRecord setSelected:!buttonState];
if ([self.audioRecord isSelected]) {
[self.recorder startRecord];
}else {
[self.recorder stopRecord];
}
SpeakHereController
#import "SpeakHereController.h"
@implementation SpeakHereController
@synthesize player;
@synthesize recorder;
@synthesize btn_record;
@synthesize btn_play;
@synthesize fileDescription;
@synthesize lvlMeter_in;
@synthesize playbackWasInterrupted;
char *OSTypeToStr(char *buf, OSType t)
{
char *p = buf;
char str[4], *q = str;
*(UInt32 *)str = CFSwapInt32(t);
for (int i = 0; i < 4; ++i) {
if (isprint(*q) && *q != '\\')
*p++ = *q++;
else {
sprintf(p, "\\x%02x", *q++);
p += 4;
}
}
*p = '\0';
return buf;
}
-(void)setFileDescriptionForFormat: (CAStreamBasicDescription)format withName:(NSString*)name
{
char buf[5];
const char *dataFormat = OSTypeToStr(buf, format.mFormatID);
NSString* description = [[NSString alloc] initWithFormat:@"(%d ch. %s @ %g Hz)", format.NumberChannels(), dataFormat, format.mSampleRate, nil];
fileDescription.text = description;
[description release];
}
#pragma mark Playback routines
-(void)stopPlayQueue
{
// player->StopQueue();
[lvlMeter_in setAq: nil];
btn_record.enabled = YES;
}
-(void)pausePlayQueue
{
// player->PauseQueue();
playbackWasPaused = YES;
}
-(void)startRecord
{
// recorder = new AQRecorder();
if (recorder->IsRunning()) // If we are currently recording, stop and save the file.
{
[self stopRecord];
}
else // If we're not recording, start.
{
// btn_play.enabled = NO;
// Set the button's state to "stop"
// btn_record.title = @"Stop";
// Start the recorder
recorder->StartRecord(CFSTR("recordedFile.caf"));
[self setFileDescriptionForFormat:recorder->DataFormat() withName:@"Recorded File"];
// Hook the level meter up to the Audio Queue for the recorder
// [lvlMeter_in setAq: recorder->Queue()];
}
}
- (void)stopRecord
{
// Disconnect our level meter from the audio queue
// [lvlMeter_in setAq: nil];
recorder->StopRecord();
// dispose the previous playback queue
// player->DisposeQueue(true);
// now create a new queue for the recorded file
recordFilePath = (CFStringRef)[NSTemporaryDirectory() stringByAppendingPathComponent: @"recordedFile.caf"];
// player->CreateQueueForFile(recordFilePath);
// Set the button's state back to "record"
// btn_record.title = @"Record";
// btn_play.enabled = YES;
}
- (IBAction)play:(id)sender
{
if (player->IsRunning())
{
if (playbackWasPaused) {
// OSStatus result = player->StartQueue(true);
// if (result == noErr)
// [[NSNotificationCenter defaultCenter] postNotificationName:@"playbackQueueResumed" object:self];
}
else
// [self stopPlayQueue];
nil;
}
else
{
// OSStatus result = player->StartQueue(false);
// if (result == noErr)
// [[NSNotificationCenter defaultCenter] postNotificationName:@"playbackQueueResumed" object:self];
}
}
- (IBAction)record:(id)sender
{
if (recorder->IsRunning()) // If we are currently recording, stop and save the file.
{
[self stopRecord];
}
else // If we're not recording, start.
{
// btn_play.enabled = NO;
//
// // Set the button's state to "stop"
// btn_record.title = @"Stop";
// Start the recorder
recorder->StartRecord(CFSTR("recordedFile.caf"));
[self setFileDescriptionForFormat:recorder->DataFormat() withName:@"Recorded File"];
// Hook the level meter up to the Audio Queue for the recorder
[lvlMeter_in setAq: recorder->Queue()];
}
}
#pragma mark AudioSession listeners
void interruptionListener( void * inClientData,
UInt32 inInterruptionState)
{
SpeakHereController *THIS = (SpeakHereController*)inClientData;
if (inInterruptionState == kAudioSessionBeginInterruption)
{
if (THIS->recorder->IsRunning()) {
[THIS stopRecord];
}
else if (THIS->player->IsRunning()) {
//the queue will stop itself on an interruption, we just need to update the UI
[[NSNotificationCenter defaultCenter] postNotificationName:@"playbackQueueStopped" object:THIS];
THIS->playbackWasInterrupted = YES;
}
}
else if ((inInterruptionState == kAudioSessionEndInterruption) && THIS->playbackWasInterrupted)
{
// we were playing back when we were interrupted, so reset and resume now
// THIS->player->StartQueue(true);
[[NSNotificationCenter defaultCenter] postNotificationName:@"playbackQueueResumed" object:THIS];
THIS->playbackWasInterrupted = NO;
}
}
void propListener( void * inClientData,
AudioSessionPropertyID inID,
UInt32 inDataSize,
const void * inData)
{
SpeakHereController *THIS = (SpeakHereController*)inClientData;
if (inID == kAudioSessionProperty_AudioRouteChange)
{
CFDictionaryRef routeDictionary = (CFDictionaryRef)inData;
//CFShow(routeDictionary);
CFNumberRef reason = (CFNumberRef)CFDictionaryGetValue(routeDictionary, CFSTR(kAudioSession_AudioRouteChangeKey_Reason));
SInt32 reasonVal;
CFNumberGetValue(reason, kCFNumberSInt32Type, &reasonVal);
if (reasonVal != kAudioSessionRouteChangeReason_CategoryChange)
{
/*CFStringRef oldRoute = (CFStringRef)CFDictionaryGetValue(routeDictionary, CFSTR(kAudioSession_AudioRouteChangeKey_OldRoute));
if (oldRoute)
{
printf("old route:\n");
CFShow(oldRoute);
}
else
printf("ERROR GETTING OLD AUDIO ROUTE!\n");
CFStringRef newRoute;
UInt32 size; size = sizeof(CFStringRef);
OSStatus error = AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &size, &newRoute);
if (error) printf("ERROR GETTING NEW AUDIO ROUTE! %d\n", error);
else
{
printf("new route:\n");
CFShow(newRoute);
}*/
if (reasonVal == kAudioSessionRouteChangeReason_OldDeviceUnavailable)
{
if (THIS->player->IsRunning()) {
[THIS pausePlayQueue];
[[NSNotificationCenter defaultCenter] postNotificationName:@"playbackQueueStopped" object:THIS];
}
}
// stop the queue if we had a non-policy route change
if (THIS->recorder->IsRunning()) {
[THIS stopRecord];
}
}
}
else if (inID == kAudioSessionProperty_AudioInputAvailable)
{
if (inDataSize == sizeof(UInt32)) {
UInt32 isAvailable = *(UInt32*)inData;
// disable recording if input is not available
THIS->btn_record.enabled = (isAvailable > 0) ? YES : NO;
}
}
}
#pragma mark Initialization routines
- (void)awakeFromNib
{
// Allocate our singleton instance for the recorder & player object
recorder = new AQRecorder();
player = nil;//new AQPlayer();
OSStatus error = AudioSessionInitialize(NULL, NULL, interruptionListener, self);
if (error) printf("ERROR INITIALIZING AUDIO SESSION! %d\n", error);
else
{
UInt32 category = kAudioSessionCategory_PlayAndRecord;
error = AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(category), &category);
if (error) printf("couldn't set audio category!");
error = AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange, propListener, self);
if (error) printf("ERROR ADDING AUDIO SESSION PROP LISTENER! %d\n", error);
UInt32 inputAvailable = 0;
UInt32 size = sizeof(inputAvailable);
// we do not want to allow recording if input is not available
error = AudioSessionGetProperty(kAudioSessionProperty_AudioInputAvailable, &size, &inputAvailable);
if (error) printf("ERROR GETTING INPUT AVAILABILITY! %d\n", error);
// btn_record.enabled = (inputAvailable) ? YES : NO;
// we also need to listen to see if input availability changes
error = AudioSessionAddPropertyListener(kAudioSessionProperty_AudioInputAvailable, propListener, self);
if (error) printf("ERROR ADDING AUDIO SESSION PROP LISTENER! %d\n", error);
error = AudioSessionSetActive(true);
if (error) printf("AudioSessionSetActive (true) failed");
}
// [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackQueueStopped:) name:@"playbackQueueStopped" object:nil];
// [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackQueueResumed:) name:@"playbackQueueResumed" object:nil];
// UIColor *bgColor = [[UIColor alloc] initWithRed:.39 green:.44 blue:.57 alpha:.5];
// [lvlMeter_in setBackgroundColor:bgColor];
// [lvlMeter_in setBorderColor:bgColor];
// [bgColor release];
// disable the play button since we have no recording to play yet
// btn_play.enabled = NO;
// playbackWasInterrupted = NO;
// playbackWasPaused = NO;
}
# pragma mark Notification routines
- (void)playbackQueueStopped:(NSNotification *)note
{
btn_play.title = @"Play";
[lvlMeter_in setAq: nil];
btn_record.enabled = YES;
}
- (void)playbackQueueResumed:(NSNotification *)note
{
btn_play.title = @"Stop";
btn_record.enabled = NO;
[lvlMeter_in setAq: player->Queue()];
}
#pragma mark Cleanup
- (void)dealloc
{
[btn_record release];
[btn_play release];
[fileDescription release];
[lvlMeter_in release];
// delete player;
delete recorder;
[super dealloc];
}
@end
AQRecorder （.h有2行重要性
#define kNumberRecordBuffers 3
#define kBufferDurationSeconds 5.0
）
#include "AQRecorder.h"
//#include "UploadAudioWrapperInterface.h"
//#include "RestClient.h"
RestClient * restClient;
NSData* data;
// ____________________________________________________________________________________
// Determine the size, in bytes, of a buffer necessary to represent the supplied number
// of seconds of audio data.
int AQRecorder::ComputeRecordBufferSize(const AudioStreamBasicDescription *format, float seconds)
{
int packets, frames, bytes = 0;
try {
frames = (int)ceil(seconds * format->mSampleRate);
if (format->mBytesPerFrame > 0)
bytes = frames * format->mBytesPerFrame;
else {
UInt32 maxPacketSize;
if (format->mBytesPerPacket > 0)
maxPacketSize = format->mBytesPerPacket; // constant packet size
else {
UInt32 propertySize = sizeof(maxPacketSize);
XThrowIfError(AudioQueueGetProperty(mQueue, kAudioQueueProperty_MaximumOutputPacketSize, &maxPacketSize,
&propertySize), "couldn't get queue's maximum output packet size");
}
if (format->mFramesPerPacket > 0)
packets = frames / format->mFramesPerPacket;
else
packets = frames; // worst-case scenario: 1 frame in a packet
if (packets == 0) // sanity check
packets = 1;
bytes = packets * maxPacketSize;
}
} catch (CAXException e) {
char buf[256];
fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
return 0;
}
return bytes;
}
// ____________________________________________________________________________________
// AudioQueue callback function, called when an input buffers has been filled.
void AQRecorder::MyInputBufferHandler( void * inUserData,
AudioQueueRef inAQ,
AudioQueueBufferRef inBuffer,
const AudioTimeStamp * inStartTime,
UInt32 inNumPackets,
const AudioStreamPacketDescription* inPacketDesc)
{
AQRecorder *aqr = (AQRecorder *)inUserData;
try {
if (inNumPackets > 0) {
// write packets to file
// XThrowIfError(AudioFileWritePackets(aqr->mRecordFile, FALSE, inBuffer->mAudioDataByteSize,
// inPacketDesc, aqr->mRecordPacket, &inNumPackets, inBuffer->mAudioData),
// "AudioFileWritePackets failed");
aqr->mRecordPacket += inNumPackets;
// int numBytes = inBuffer->mAudioDataByteSize;
// SInt8 *testBuffer = (SInt8*)inBuffer->mAudioData;
//
// for (int i=0; i < numBytes; i++)
// {
// SInt8 currentData = testBuffer[i];
// printf("Current data in testbuffer is %d", currentData);
//
// NSData * temp = [NSData dataWithBytes:currentData length:sizeof(currentData)];
// }
data=[[NSData dataWithBytes:inBuffer->mAudioData length:inBuffer->mAudioDataByteSize]retain];
[restClient uploadAudioData:data url:nil];
}
// if we're not stopping, re-enqueue the buffer so that it gets filled again
if (aqr->IsRunning())
XThrowIfError(AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL), "AudioQueueEnqueueBuffer failed");
} catch (CAXException e) {
char buf[256];
fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
}
}
AQRecorder::AQRecorder()
{
mIsRunning = false;
mRecordPacket = 0;
data = [[NSData alloc]init];
restClient = [[RestClient sharedManager]retain];
}
AQRecorder::~AQRecorder()
{
AudioQueueDispose(mQueue, TRUE);
AudioFileClose(mRecordFile);
if (mFileName){
CFRelease(mFileName);
}
[restClient release];
[data release];
}
// ____________________________________________________________________________________
// Copy a queue's encoder's magic cookie to an audio file.
void AQRecorder::CopyEncoderCookieToFile()
{
UInt32 propertySize;
// get the magic cookie, if any, from the converter
OSStatus err = AudioQueueGetPropertySize(mQueue, kAudioQueueProperty_MagicCookie, &propertySize);
// we can get a noErr result and also a propertySize == 0
// -- if the file format does support magic cookies, but this file doesn't have one.
if (err == noErr && propertySize > 0) {
Byte *magicCookie = new Byte[propertySize];
UInt32 magicCookieSize;
XThrowIfError(AudioQueueGetProperty(mQueue, kAudioQueueProperty_MagicCookie, magicCookie, &propertySize), "get audio converter's magic cookie");
magicCookieSize = propertySize; // the converter lies and tell us the wrong size
// now set the magic cookie on the output file
UInt32 willEatTheCookie = false;
// the converter wants to give us one; will the file take it?
err = AudioFileGetPropertyInfo(mRecordFile, kAudioFilePropertyMagicCookieData, NULL, &willEatTheCookie);
if (err == noErr && willEatTheCookie) {
err = AudioFileSetProperty(mRecordFile, kAudioFilePropertyMagicCookieData, magicCookieSize, magicCookie);
XThrowIfError(err, "set audio file's magic cookie");
}
delete[] magicCookie;
}
}
void AQRecorder::SetupAudioFormat(UInt32 inFormatID)
{
memset(&mRecordFormat, 0, sizeof(mRecordFormat));
UInt32 size = sizeof(mRecordFormat.mSampleRate);
XThrowIfError(AudioSessionGetProperty( kAudioSessionProperty_CurrentHardwareSampleRate,
&size,
&mRecordFormat.mSampleRate), "couldn't get hardware sample rate");
//override samplearate to 8k from device sample rate
mRecordFormat.mSampleRate = 8000.0;
size = sizeof(mRecordFormat.mChannelsPerFrame);
XThrowIfError(AudioSessionGetProperty( kAudioSessionProperty_CurrentHardwareInputNumberChannels,
&size,
&mRecordFormat.mChannelsPerFrame), "couldn't get input channel count");
// mRecordFormat.mChannelsPerFrame = 1;
mRecordFormat.mFormatID = inFormatID;
if (inFormatID == kAudioFormatLinearPCM)
{
// if we want pcm, default to signed 16-bit little-endian
mRecordFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
mRecordFormat.mBitsPerChannel = 16;
mRecordFormat.mBytesPerPacket = mRecordFormat.mBytesPerFrame = (mRecordFormat.mBitsPerChannel / 8) * mRecordFormat.mChannelsPerFrame;
mRecordFormat.mFramesPerPacket = 1;
}
if (inFormatID == kAudioFormatULaw) {
// NSLog(@"is ulaw");
mRecordFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
mRecordFormat.mSampleRate = 8000.0;
// mRecordFormat.mFormatFlags = 0;
mRecordFormat.mFramesPerPacket = 1;
mRecordFormat.mChannelsPerFrame = 1;
mRecordFormat.mBitsPerChannel = 16;//was 8
mRecordFormat.mBytesPerPacket = 1;
mRecordFormat.mBytesPerFrame = 1;
}
}
NSString * GetDocumentDirectory(void)
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
return basePath;
}
void AQRecorder::StartRecord(CFStringRef inRecordFile)
{
int i, bufferByteSize;
UInt32 size;
CFURLRef url;
try {
mFileName = CFStringCreateCopy(kCFAllocatorDefault, inRecordFile);
// specify the recording format
SetupAudioFormat(kAudioFormatULaw /*kAudioFormatLinearPCM*/);
// create the queue
XThrowIfError(AudioQueueNewInput(
&mRecordFormat,
MyInputBufferHandler,
this /* userData */,
NULL /* run loop */, NULL /* run loop mode */,
0 /* flags */, &mQueue), "AudioQueueNewInput failed");
// get the record format back from the queue's audio converter --
// the file may require a more specific stream description than was necessary to create the encoder.
mRecordPacket = 0;
size = sizeof(mRecordFormat);
XThrowIfError(AudioQueueGetProperty(mQueue, kAudioQueueProperty_StreamDescription,
&mRecordFormat, &size), "couldn't get queue's format");
NSString *basePath = GetDocumentDirectory();
NSString *recordFile = [basePath /*NSTemporaryDirectory()*/ stringByAppendingPathComponent: (NSString*)inRecordFile];
url = CFURLCreateWithString(kCFAllocatorDefault, (CFStringRef)recordFile, NULL);
// create the audio file
XThrowIfError(AudioFileCreateWithURL(url, kAudioFileCAFType, &mRecordFormat, kAudioFileFlags_EraseFile,
&mRecordFile), "AudioFileCreateWithURL failed");
CFRelease(url);
// copy the cookie first to give the file object as much info as we can about the data going in
// not necessary for pcm, but required for some compressed audio
CopyEncoderCookieToFile();
// allocate and enqueue buffers
bufferByteSize = ComputeRecordBufferSize(&mRecordFormat, kBufferDurationSeconds); // enough bytes for half a second
for (i = 0; i < kNumberRecordBuffers; ++i) {
XThrowIfError(AudioQueueAllocateBuffer(mQueue, bufferByteSize, &mBuffers[i]),
"AudioQueueAllocateBuffer failed");
XThrowIfError(AudioQueueEnqueueBuffer(mQueue, mBuffers[i], 0, NULL),
"AudioQueueEnqueueBuffer failed");
}
// start the queue
mIsRunning = true;
XThrowIfError(AudioQueueStart(mQueue, NULL), "AudioQueueStart failed");
}
catch (CAXException &e) {
char buf[256];
fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
}
catch (...) {
fprintf(stderr, "An unknown error occurred\n");
}
}
void AQRecorder::StopRecord()
{
// end recording
mIsRunning = false;
// XThrowIfError(AudioQueueReset(mQueue), "AudioQueueStop failed");
XThrowIfError(AudioQueueStop(mQueue, true), "AudioQueueStop failed");
// a codec may update its cookie at the end of an encoding session, so reapply it to the file now
CopyEncoderCookieToFile();
if (mFileName)
{
CFRelease(mFileName);
mFileName = NULL;
}
AudioQueueDispose(mQueue, true);
AudioFileClose(mRecordFile);
}
请随时评论或改进我的答案，我会接受它作为答案，如果它是一个更好的解决方案。请注意这是我的第一次尝试，我相信它不是最优雅或最合适的解决方案。
答案 1 :(得分：0)
你可以使用gamekit框架吗？然后通过蓝牙发送音频。 ios开发人员库中有一些示例