Вперед Назад

Classes/SpeakHereController.mm

/*

    File: SpeakHereController.mm

Abstract: n/a

 Version: 2.5

Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple

Inc. ("Apple") in consideration of your agreement to the following

terms, and your use, installation, modification or redistribution of

this Apple software constitutes acceptance of these terms.  If you do

not agree with these terms, please do not use, install, modify or

redistribute this Apple software.

In consideration of your agreement to abide by the following terms, and

subject to these terms, Apple grants you a personal, non-exclusive

license, under Apple's copyrights in this original Apple software (the

"Apple Software"), to use, reproduce, modify and redistribute the Apple

Software, with or without modifications, in source and/or binary forms;

provided that if you redistribute the Apple Software in its entirety and

without modifications, you must retain this notice and the following

text and disclaimers in all such redistributions of the Apple Software.

Neither the name, trademarks, service marks or logos of Apple Inc. may

be used to endorse or promote products derived from the Apple Software

without specific prior written permission from Apple.  Except as

expressly stated in this notice, no other rights or licenses, express or

implied, are granted by Apple herein, including but not limited to any

patent rights that may be infringed by your derivative works or by other

works in which the Apple Software may be incorporated.

The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,

MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED

AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),

STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE

POSSIBILITY OF SUCH DAMAGE.

Copyright (C) 2012 Apple Inc. All Rights Reserved.

*/

#import "SpeakHereController.h"

@implementation SpeakHereController

@synthesize player;

@synthesize recorder;

@synthesize btn_record;

@synthesize btn_play;

@synthesize fileDescription;

@synthesize lvlMeter_in;

@synthesize playbackWasInterrupted;

@synthesize inBackground;

char *OSTypeToStr(char *buf, OSType t)

    char *p = buf;

    char str[4] = {0};

    char *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:@"(%ld 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)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);

            playbackWasPaused = NO;

            if (result == noErr)

                [[NSNotificationCenter defaultCenter] postNotificationName:@"playbackQueueResumed" object:self];

        else

            [self stopPlayQueue];

    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 = new AQPlayer();

    OSStatus error = AudioSessionInitialize(NULL, NULL, interruptionListener, self);

    if (error) printf("ERROR INITIALIZING AUDIO SESSION! %d\n", (int)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", (int)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", (int)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", (int)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;

    [self registerForBackgroundNotifications];

# 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 background notifications

- (void)registerForBackgroundNotifications

    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(resignActive)

                                                 name:UIApplicationWillResignActiveNotification

                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(enterForeground)

                                                 name:UIApplicationWillEnterForegroundNotification

                                               object:nil];

- (void)resignActive

    if (recorder->IsRunning()) [self stopRecord];

    if (player->IsRunning()) [self stopPlayQueue];

    inBackground = true;

- (void)enterForeground

    OSStatus error = AudioSessionSetActive(true);

    if (error) printf("AudioSessionSetActive (true) failed");

    inBackground = false;

#pragma mark Cleanup

- (void)dealloc

    [btn_record release];

    [btn_play release];

    [fileDescription release];

    [lvlMeter_in release];

    delete player;

    delete recorder;

    [super dealloc];

@end

Вперед Назад