Split iSAC encoder/decoder: Test more cases (and make sure they work)

webrtc/modules/audio_coding/codecs/isac/fix/source/isacfix.c

 /*
  *  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 1092 matching lines @@
   if (framesize  == 30 || framesize == 60)
     ISAC_inst->ISACenc_obj.new_framelength = (int16_t)((FS/1000) * framesize);
   else {
     ISAC_inst->errorcode = ISAC_DISALLOWED_FRAME_LENGTH;
     return -1;
   }
 
   return 0;
 }
 
+void WebRtcIsacfix_SetInitialBweBottleneck(ISACFIX_MainStruct* ISAC_main_inst,
+                                           int bottleneck_bits_per_second) {
+  ISACFIX_SubStruct* inst = (ISACFIX_SubStruct*)ISAC_main_inst;
+  assert(bottleneck_bits_per_second >= 10000 &&
+         bottleneck_bits_per_second <= 32000);
+  inst->bwestimator_obj.sendBwAvg = ((uint32_t)bottleneck_bits_per_second) << 7;
+}
 
 /****************************************************************************
  * WebRtcIsacfix_ControlBwe(...)
  *
  * This function sets the initial values of bottleneck and frame-size if
  * iSAC is used in channel-adaptive mode. Through this API, users can
  * enforce a frame-size for all values of bottleneck. Then iSAC will not
  * automatically change the frame-size.
  *
  *
@@ skipping 411 matching lines @@
   assert(inst->initflag & 1);  // Decoder initialized.
   WebRtcIsacfixBw_GetBandwidthInfo(&inst->bwestimator_obj, bwinfo);
 }
 
 void WebRtcIsacfix_SetBandwidthInfo(ISACFIX_MainStruct* ISAC_main_inst,
                                     const IsacBandwidthInfo* bwinfo) {
   ISACFIX_SubStruct* inst = (ISACFIX_SubStruct*)ISAC_main_inst;
   assert(inst->initflag & 2);  // Encoder initialized.
   WebRtcIsacfixBw_SetBandwidthInfo(&inst->bwestimator_obj, bwinfo);
 }