#import "SCListener.h" <\/span>// Remember to link to AudioToolbox.framework.<\/span><\/div> <\/div>
// Start listening.<\/span><\/div>[[<\/span>SCListener<\/span> sharedListener<\/span>]<\/span> listen<\/span>];<\/span><\/div> <\/div>
// Retrieve the average power.<\/span><\/div>[[<\/span>SCListener<\/span> sharedListener<\/span>]<\/span> averagePower<\/span>];<\/span><\/div> <\/div>
// Retrieve the peak power.<\/span><\/div>[[<\/span>SCListener<\/span> sharedListener<\/span>]<\/span> peakPower<\/span>];<\/span><\/div> <\/div>
// Hmm...we're using this guy a lot...<\/span><\/div>SCListener<\/span> *<\/span>listener<\/span> =<\/span> [<\/span>SCListener<\/span> sharedListener<\/span>];<\/span><\/div> <\/div>
// We can temporarily stop returning levels<\/span><\/div>[<\/span>listener<\/span> pause<\/span>];<\/span><\/div>[<\/span>listener<\/span> listen<\/span>];<\/span> // Quick.<\/span><\/div> <\/div>
// Or free up resources when we're not listening for awhile.<\/span><\/div>[<\/span>listener<\/span> stop<\/span>];<\/span><\/div>[<\/span>listener<\/span> listen<\/span>];<\/span> // Slower.<\/span><\/div> <\/div>
// Advanced!:<\/span><\/div>//<\/span><\/div>// If you're using the average and the peak, fetch both at once.<\/span><\/div>if<\/span> (<\/span>!<\/span>[<\/span>listener<\/span> isListening<\/span>])<\/span> // If listener has paused or stopped...<\/span><\/div> return<\/span>;<\/span> // ...bail.<\/span><\/div> <\/div>
AudioQueueLevelMeterState<\/span> *<\/span>levels<\/span> =<\/span> [<\/span>listener<\/span> levels<\/span>];<\/span><\/div>Float32<\/span> peak<\/span> =<\/span> levels<\/span>[<\/span>0<\/span>].<\/span>mPeakPower<\/span>;<\/span><\/div>Float32<\/span> average<\/span> =<\/span> levels<\/span>[<\/span>0<\/span>].<\/span>mAveragePower<\/span>;<\/span><\/div> <\/div><\/pre><\/div>\n \n <\/div>\n\n