Returning correct duration estimate on Opus DTX packets.

webrtc/modules/audio_coding/codecs/opus/opus_unittest.cc

 /*
  *  Copyright (c) 2013 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.
  */
 #include <string>
@@ skipping 87 matching lines @@
 int OpusTest::EncodeDecode(WebRtcOpusEncInst* encoder,
                            const int16_t* input_audio,
                            size_t input_samples,
                            WebRtcOpusDecInst* decoder,
                            int16_t* output_audio,
                            int16_t* audio_type) {
   int encoded_bytes_int = WebRtcOpus_Encode(encoder, input_audio, input_samples,
                                             kMaxBytes, bitstream_);
   EXPECT_GE(encoded_bytes_int, 0);
   encoded_bytes_ = static_cast<size_t>(encoded_bytes_int);
-  return WebRtcOpus_Decode(decoder, bitstream_,
-                           encoded_bytes_, output_audio,
-                           audio_type);
+  int est_len = WebRtcOpus_DurationEst(decoder, bitstream_, encoded_bytes_);
+  int act_len = WebRtcOpus_Decode(decoder, bitstream_,
+                                  encoded_bytes_, output_audio,
+                                  audio_type);
+  EXPECT_EQ(est_len, act_len);
+  return act_len;
 }
 
 // Test if encoder/decoder can enter DTX mode properly and do not enter DTX when
 // they should not. This test is signal dependent.
 void OpusTest::TestDtxEffect(bool dtx) {
   PrepareSpeechData(channels_, 20, 2000);
 
   // Create encoder memory.
   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_encoder_,
                                         channels_,
@@ skipping 493 matching lines @@
   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_encoder_));
   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_decoder_));
 }
 
 INSTANTIATE_TEST_CASE_P(VariousMode,
                         OpusTest,
                         Combine(Values(1, 2), Values(0, 1)));
 
 
 }  // namespace webrtc