fix issue #243

syedhali · Dec 30, 2015 · 086d627 · 086d627
1 parent f27e299
commit 086d627
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Showing 3 changed files with 28 additions and 1 deletion.
diff --git a/EZAudio/EZAudioUtilities.h b/EZAudio/EZAudioUtilities.h
@@ -231,6 +231,15 @@ typedef NSRect EZRect;
 
 //------------------------------------------------------------------------------
 
+/**
+ Creates a two-channel, packed, signed integer-based AudioStreamBasicDescription.
+ @param sampleRate A float representing the sample rate.
+ @return A new AudioStreamBasicDescription with the specified format.
+ */
++ (AudioStreamBasicDescription)stereoSignedIntegerPackedFormatWithSampleRate:(float)sampleRate;
+
+//------------------------------------------------------------------------------
+
 /**
  Creates a two-channel, non-interleaved, float-based AudioStreamBasicDescription.
  @param sampleRate A float representing the sample rate.

diff --git a/EZAudio/EZAudioUtilities.m b/EZAudio/EZAudioUtilities.m
@@ -302,6 +302,24 @@ + (AudioStreamBasicDescription)stereoFloatInterleavedFormatWithSampleRate:(float
 
 //------------------------------------------------------------------------------
 
++ (AudioStreamBasicDescription)stereoSignedIntegerPackedFormatWithSampleRate:(float)sampleRate
+{
+  AudioStreamBasicDescription asbd;
+  UInt32 floatByteSize   = sizeof(float);
+  asbd.mChannelsPerFrame = 2;
+  asbd.mBitsPerChannel   = 4 * floatByteSize;
+  asbd.mBytesPerFrame    = asbd.mChannelsPerFrame * floatByteSize;
+  asbd.mFramesPerPacket  = 1;
+  asbd.mBytesPerPacket   = asbd.mFramesPerPacket * asbd.mBytesPerFrame;
+  asbd.mFormatFlags      = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
+  asbd.mFormatID         = kAudioFormatLinearPCM;
+  asbd.mSampleRate       = sampleRate;
+  asbd.mReserved         = 0;
+  return asbd;
+}
+
+//------------------------------------------------------------------------------
+
 + (AudioStreamBasicDescription)stereoFloatNonInterleavedFormatWithSampleRate:(float)sampleRate
 {
     AudioStreamBasicDescription asbd;

diff --git a/EZAudio/EZRecorder.m b/EZAudio/EZRecorder.m
@@ -233,7 +233,7 @@ + (AudioStreamBasicDescription)formatForFileType:(EZRecorderFileType)fileType
             break;
 
         case EZRecorderFileTypeWAV:
-            asbd = [EZAudioUtilities stereoFloatInterleavedFormatWithSampleRate:sourceFormat.mSampleRate];
+            asbd = [EZAudioUtilities stereoSignedIntegerPackedFormatWithSampleRate:sourceFormat.mSampleRate];
             break;
 
         default: