audio_processing: Create now returns a pointer to the object

webrtc/modules/audio_processing/agc/legacy/gain_control.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 182 matching lines @@
  * Output:
  *      - config            : config struct
  *
  * Return value:
  *                          :  0 - Normal operation.
  *                          : -1 - Error
  */
 int WebRtcAgc_get_config(void* agcInst, WebRtcAgcConfig* config);
 
 /*
- * This function creates an AGC instance, which will contain the state
- * information for one (duplex) channel.
- *
- * Return value             : AGC instance if successful
- *                          : 0 (i.e., a NULL pointer) if unsuccessful
+ * This function creates and returns an AGC instance, which will contain the
+ * state information for one (duplex) channel.
  */
-int WebRtcAgc_Create(void **agcInst);
+void* WebRtcAgc_Create();
 
 /*
  * This function frees the AGC instance created at the beginning.
  *
  * Input:
  *      - agcInst           : AGC instance.
  */
 void WebRtcAgc_Free(void* agcInst);
 
 /*
@@ skipping 16 matching lines @@
                    int32_t minLevel,
                    int32_t maxLevel,
                    int16_t agcMode,
                    uint32_t fs);
 
 #if defined(__cplusplus)
 }
 #endif
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AGC_LEGACY_GAIN_CONTROL_H_