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

webrtc/modules/audio_coding/codecs/isac/main/source/isac.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 1560 matching lines @@
 
   /* Update the payload limit if the bandwidth is changing. */
   if (instISAC->bandwidthKHz != bandwidthKHz) {
     instISAC->bandwidthKHz = bandwidthKHz;
     UpdatePayloadSizeLimit(instISAC);
   }
   instISAC->bottleneck = bottleneckBPS;
   return 0;
 }
 
+void WebRtcIsac_SetInitialBweBottleneck(ISACStruct* ISAC_main_inst,
+                                        int bottleneck_bits_per_second) {
+  ISACMainStruct* instISAC = (ISACMainStruct*)ISAC_main_inst;
+  assert(bottleneck_bits_per_second >= 10000 &&
+         bottleneck_bits_per_second <= 32000);
+  instISAC->bwestimator_obj.send_bw_avg = (float)bottleneck_bits_per_second;
+}
 
 /****************************************************************************
  * WebRtcIsac_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 801 matching lines @@
   WebRtcIsacBw_GetBandwidthInfo(&instISAC->bwestimator_obj,
                                 instISAC->decoderSamplingRateKHz, bwinfo);
 }
 
 void WebRtcIsac_SetBandwidthInfo(ISACStruct* inst,
                                  const IsacBandwidthInfo* bwinfo) {
   ISACMainStruct* instISAC = (ISACMainStruct*)inst;
   assert(instISAC->initFlag & BIT_MASK_ENC_INIT);
   WebRtcIsacBw_SetBandwidthInfo(&instISAC->bwestimator_obj, bwinfo);
 }
+
+void WebRtcIsac_SetEncSampRateInDecoder(ISACStruct* inst,
+                                        int sample_rate_hz) {
+  ISACMainStruct* instISAC = (ISACMainStruct*)inst;
+  assert(instISAC->initFlag & BIT_MASK_DEC_INIT);
+  assert(!(instISAC->initFlag & BIT_MASK_ENC_INIT));
+  assert(sample_rate_hz == 16000 || sample_rate_hz == 32000);
+  instISAC->encoderSamplingRateKHz = sample_rate_hz / 1000;
+}