Fix bug in DTMF generation where events with level > 36 would be ignored.

webrtc/modules/audio_coding/neteq/dtmf_tone_generator_unittest.cc

 /*
  *  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 52 matching lines @@
     AudioMultiVector signal(channels);
     AudioMultiVector ref_signal(channels);
 
     const int event_vec[] = {0, 4, 9, 13};  // Test a few events.
     for (int e = 0; e < 4; ++e) {
       int event = event_vec[e];
       // Create full-scale reference.
       ASSERT_EQ(0, tone_gen_.Init(fs_hz, event, 0));  // 0 attenuation.
       EXPECT_EQ(kNumSamples, tone_gen_.Generate(kNumSamples, &ref_signal));
       // Test every 5 steps (to save time).
-      for (int attenuation = 1; attenuation <= 36; attenuation += 5) {
+      for (int attenuation = 1; attenuation <= 63; attenuation += 5) {
         std::ostringstream ss;
         ss << "Checking event " << event << " at sample rate " << fs_hz;
         ss << "; attenuation " << attenuation;
         SCOPED_TRACE(ss.str());
         ASSERT_EQ(0, tone_gen_.Init(fs_hz, event, attenuation));
         EXPECT_EQ(kNumSamples, tone_gen_.Generate(kNumSamples, &signal));
         for (int n = 0; n < kNumSamples; ++n) {
           double attenuation_factor =
               pow(10, -static_cast<double>(attenuation) / 20);
           // Verify that the attenuation is correct.
@@ skipping 73 matching lines @@
   const int event = 7;        // Valid event.
   const int attenuation = 0;  // Valid attenuation.
   // Initialize with invalid event -1.
   EXPECT_EQ(DtmfToneGenerator::kParameterError,
             tone_gen.Init(fs, -1, attenuation));
   // Initialize with invalid event 16.
   EXPECT_EQ(DtmfToneGenerator::kParameterError,
             tone_gen.Init(fs, 16, attenuation));
   // Initialize with invalid attenuation -1.
   EXPECT_EQ(DtmfToneGenerator::kParameterError, tone_gen.Init(fs, event, -1));
-  // Initialize with invalid attenuation 37.
-  EXPECT_EQ(DtmfToneGenerator::kParameterError, tone_gen.Init(fs, event, 37));
+  // Initialize with invalid attenuation 64.
+  EXPECT_EQ(DtmfToneGenerator::kParameterError, tone_gen.Init(fs, event, 64));
   EXPECT_FALSE(tone_gen.initialized());  // Should still be uninitialized.
 
   // Initialize with valid parameters.
   ASSERT_EQ(0, tone_gen.Init(fs, event, attenuation));
   EXPECT_TRUE(tone_gen.initialized());
   // NULL pointer to destination.
   EXPECT_EQ(DtmfToneGenerator::kParameterError,
             tone_gen.Generate(kNumSamples, NULL));
 }
 
 }  // namespace webrtc