转换器内存释放

Change-Id: I7d4abce9abe2f7d865cadc5779767e27f5730e42

Author: tonychanchen

Source/LinkSDKDemo/Video/P2P/Controller/TIoTDemoPreviewDeviceVC.m

@@ -260,9 +260,9 @@ - (void)getDeviceStatusWithType:(NSString *)singleType qualityType:(NSString *)q
 //                [[TIoTCoreXP2PBridge sharedInstance] sendVoiceToServer:weakSelf.deviceName?:@"" channel:channel];
                 [[TIoTSessionManager sharedInstance] resumeRTCAudioSession];
 
-                static int tt_pitch = 2;  //2 萝莉 3大叔
+                static int tt_pitch = 3;  //2 萝莉 3大叔
                 TIoTCoreAudioConfig *audio_config = [TIoTCoreAudioConfig new];
-                audio_config.refreshSession = NO;
+                audio_config.refreshSession = YES;
                 audio_config.sampleRate = TIoTAVCaptionFLVAudio_16;
                 audio_config.channels = 1;
                 audio_config.isEchoCancel = YES;

Source/SDK/LinkVideo/FLV/TIoTAACEncoder.m

@@ -231,7 +231,13 @@ - (void) encodeSampleBuffer:(CMSampleBufferRef)sampleBuffer {
     });
 }
 
-
+- (void)dealloc {
+    ConverterContext *cxt = self->convertContext;
+    if (cxt && cxt->converter) {
+        AudioConverterDispose(cxt->converter);
+        cxt->converter = NULL;
+    }
+}
 #pragma mark - HEADER
 /**
  *  Add ADTS header at the beginning of each and every AAC packet.