add iOS support for AMR codec. Closes #100

Author: jsierles

README.md

@@ -54,7 +54,7 @@ AudioQuality: string
 AudioEncoding: string
 ```
 
-Encodings supported on iOS: `lpcm, ima4, aac, MAC3, MAC6, ulaw, alaw, mp1, mp2, alac`
+Encodings supported on iOS: `lpcm, ima4, aac, MAC3, MAC6, ulaw, alaw, mp1, mp2, alac, amr`
 Encodings supported on Android: `aac, aac_eld, amr_nb, amr_wb, he_aac, vorbis`
 
 #### iOS-only fields

ios/AudioRecorderManager.m

@@ -143,6 +143,8 @@ - (NSString *) applicationDocumentsDirectory
       _audioEncoding =[NSNumber numberWithInt:kAudioFormatMPEGLayer2];
     } else if ([encoding  isEqual: @"alac"]) {
       _audioEncoding =[NSNumber numberWithInt:kAudioFormatAppleLossless];
+    } else if ([encoding  isEqual: @".amr"]) {
+      _audioEncoding =[NSNumber numberWithInt:kAudioFormatAMR];
     }
   }