How to play MP3 Audio Stream

catfacts · 07-25-2008, 11:36 PM

Hi, I want to play an audio stream as soon as my appliction loads. But what I need to know is how to acutally play the stream. I think it requires the AudioToolbox.framework and CoreAudio and AudioFileStreamOpen but I don't know how. All I need it to do is start playing when the app opens and stop when it closes, buffer would be nice but isnt needed right now. I'm a bit of a noob so be nice and explain in detail please.

MaCeXpErTo · 07-25-2008, 11:45 PM

Quote:

Originally Posted by catfacts

Hi, I want to play an audio stream as soon as my appliction loads. But what I need to know is how to acutally play the stream. I think it requires the AudioToolbox.framework and CoreAudio and AudioFileStreamOpen but I don't know how. All I need it to do is start playing when the app opens and stop when it closes, buffer would be nice but isnt needed right now. I'm a bit of a noob so be nice and explain in detail please.

To play streamed audio, you connect to a network stream using the CFNetwork interfaces from Core Foundation, such as those in CFHTTPMessage. You then parse the network packets into audio packets using Audio File Stream Services (AudioToolbox/AudioFileStream.h). Finally, you play the audio packets using Audio Queue Services (AudioToolbox/AudioQueue.h). You can also use Audio File Stream Services to parse audio packets from an on-disk file.

To Play the audio when the app opens just use - (void)awakeFromNib {

Maybe someone else can go into more detail.

catfacts · 07-26-2008, 12:21 AM

That is quite helpful and my be enough. I was looking for a code example but I will try to research this more (UGH ive been doing research for 5+ hours straight, honest) but this is a lot more stuff than people have give me to put together before, thanks!

catfacts · 07-26-2008, 01:15 AM

Ok I tried

Code:

-(void)awakeFromNIB
{
	NSString *streamURL = @"http://66.225.205.8:80/";
	AudioFileStreamOpen(0, nil, nil, ".mp3", CFReadStreamRead(CFReadStreamOpen(streamURL), 8, 800));
}

But it isnt working. That is the correct URL BTW, so uh yea help plz!

MaCeXpErTo · 07-26-2008, 01:14 PM

Quote:

Originally Posted by catfacts

Ok I tried

Code:

-(void)awakeFromNIB
{
	NSString *streamURL = @"http://66.225.205.8:80/";
	AudioFileStreamOpen(0, nil, nil, ".mp3", CFReadStreamRead(CFReadStreamOpen(streamURL), 8, 800));
}

But it isnt working. That is the correct URL BTW, so uh yea help plz!

The awakeFromNIB should be - (void)awakeFromNib {

NOT capital NIB

And maybe put @interface NSObject(UINibLoadingAdditions) before the awakeFromNib

catfacts · 07-26-2008, 03:09 PM

Code:

-(void)awakeFromNib
{
		NSString *streamURL = @"http://66.225.205.8:80/";
		AudioFileStreamOpen(0, nil, nil, ".mp3", CFReadStreamRead(CFReadStreamOpen(streamURL), 8, 800));
}

I get the errors...

Code:

warning: passing argument 1 of 'CFReadStreamOpen' from incompatible pointer type
warning: passing argument 1 of 'CFReadStreamRead' makes pointer from integer without a cast
warning: passing argument 2 of 'CFReadStreamRead' makes pinter from integer without a cast
warning: passing argument 4 of 'AudioFileStreamOpen' makes integer from pointer without a cast
warning: passing argument 5 of 'AudioFileStreamOpen' makes pointer from integer without a cast

so i think i messed up some of these arguments.

ToM · 08-03-2008, 01:43 PM

Quote:

Originally Posted by catfacts

Code:

-(void)awakeFromNib
{
		NSString *streamURL = @"http://66.225.205.8:80/";
		AudioFileStreamOpen(0, nil, nil, ".mp3", CFReadStreamRead(CFReadStreamOpen(streamURL), 8, 800));
}

I get the errors...

Code:

warning: passing argument 1 of 'CFReadStreamOpen' from incompatible pointer type
warning: passing argument 1 of 'CFReadStreamRead' makes pointer from integer without a cast
warning: passing argument 2 of 'CFReadStreamRead' makes pinter from integer without a cast
warning: passing argument 4 of 'AudioFileStreamOpen' makes integer from pointer without a cast
warning: passing argument 5 of 'AudioFileStreamOpen' makes pointer from integer without a cast

so i think i messed up some of these arguments.

I think it may be due to the / after the URL. Not entirely sure though, give it a go without the /.

hypercrypt · 08-16-2008, 05:45 PM

Did you get this to work?

ToM · 08-16-2008, 09:21 PM

I had a go, and still failed to get it to work.

Anyone who has had success with this, could you have a look at the code and identify what's wrong with it? I'm also looking for this.

etejkowski · 08-16-2008, 10:50 PM

These errors:

"…makes pointer from integer without a cast"

might mean that you need to define the numbers as NSInteger instead of just plugging in values. e.g.

NSInteger someNumber;
someNumber = 800;

or maybe you need an NSNumber

superuser · 09-06-2008, 10:13 AM

More on this would be very helpful.

hypercrypt · 09-06-2008, 10:23 AM

Yep, if anyone knows anything...

ToM · 09-09-2008, 10:59 AM

Agreed, I really need some help on this, too.

callajd · 10-02-2008, 12:45 PM

Anyone make any progress here? I'm eager to hear if anyone found a solution.

Thanks,
jeff.

ToM · 12-05-2008, 10:37 AM

Take a gander at this:

Cocoa with Love: Streaming and playing an MP3 stream

Vlajbert · 11-29-2009, 08:09 PM

I'm still learning this stuff but I believe the 8 should be a pointer to a buffer not an int.

CFReadStreamRead(CFReadStreamOpen(streamURL), 8, 800)

iphonemobdev · 03-15-2010, 02:21 AM

I got that sample code which working with call interruption, plz grab from here.

Smart SDKs Tips Blog Archive iPhone Audio Streamer – Working code with call interruption

ForrestShi · 03-20-2010, 02:25 AM

Quote:

Originally Posted by iphonemobdev

I got that sample code which working with call interruption, plz grab from here.

Smart SDKs Tips Blog Archive iPhone Audio Streamer – Working code with call interruption

I have tested with this sample, very awesome !

Thanks very much.

Currently I have several ideas for audio/music apps on iPhone, hope to know more guys who are interested on this topic also.

Welcome to contact : forrest.shi@@gmail.com

or SKype : forrest.shi

mixer555 · 03-21-2010, 03:56 PM

Hello guys, please advice me how to get SONG TITLE from streaming source?

Fit4him · 02-25-2012, 10:17 PM

Quote:

Originally Posted by mixer555

Hello guys, please advice me how to get SONG TITLE from streaming source?

I have searched for my days on how to keep streaming when the screen locks with AudioToolBox

Any ideas

Allen

Shorty · 02-28-2012, 11:32 AM

Quote:

Originally Posted by Fit4him

I have searched for my days on how to keep streaming when the screen locks with AudioToolBox

Any ideas

Allen

I just added the key "UIBackgroundModes" with value "audio" to the info.plist and the example from iphonemobdev now continues in background or screen locked.