Delete unused method AudioCodingModuleImpl::SetOpusApplication.

Bug: None
Change-Id: I8fc1b4b9a4521444867c8b34ee54187c86dd6027
Reviewed-on: https://webrtc-review.googlesource.com/c/102040
Reviewed-by: Minyue Li <minyue@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24993}

modules/audio_coding/acm2/audio_coding_module.cc

@@ -167,8 +167,6 @@ class AudioCodingModuleImpl final : public AudioCodingModule {
 
   int GetNetworkStatistics(NetworkStatistics* statistics) override;
 
-  int SetOpusApplication(OpusApplicationMode application) override;
-
   // If current send codec is Opus, informs it about the maximum playback rate
   // the receiver will render.
   int SetOpusMaxPlaybackRate(int frequency_hz) override;
@@ -1097,26 +1095,6 @@ int AudioCodingModuleImpl::RegisterVADCallback(ACMVADCallback* vad_callback) {
   return 0;
 }
 
-int AudioCodingModuleImpl::SetOpusApplication(OpusApplicationMode application) {
-  rtc::CritScope lock(&acm_crit_sect_);
-  if (!HaveValidEncoder("SetOpusApplication")) {
-    return -1;
-  }
-  AudioEncoder::Application app;
-  switch (application) {
-    case kVoip:
-      app = AudioEncoder::Application::kSpeech;
-      break;
-    case kAudio:
-      app = AudioEncoder::Application::kAudio;
-      break;
-    default:
-      FATAL();
-      return 0;
-  }
-  return encoder_stack_->SetApplication(app) ? 0 : -1;
-}
-
 // Informs Opus encoder of the maximum playback rate the receiver will render.
 int AudioCodingModuleImpl::SetOpusMaxPlaybackRate(int frequency_hz) {
   rtc::CritScope lock(&acm_crit_sect_);

modules/audio_coding/acm2/audio_coding_module_unittest.cc

@@ -1475,32 +1475,13 @@ TEST_F(AcmSenderBitExactnessNewApi, MAYBE_OpusFromFormat_stereo_20ms) {
       50, test::AcmReceiveTestOldApi::kStereoOutput);
 }
 
-TEST_F(AcmSenderBitExactnessOldApi, Opus_stereo_20ms_voip) {
-  ASSERT_NO_FATAL_FAILURE(SetUpTest("opus", 48000, 2, 120, 960, 960));
-  // If not set, default will be kAudio in case of stereo.
-  EXPECT_EQ(0, send_test_->acm()->SetOpusApplication(kVoip));
-  Run(AcmReceiverBitExactnessOldApi::PlatformChecksum(
-          "b0325df4e8104f04e03af23c0b75800e",
-          "b0325df4e8104f04e03af23c0b75800e",
-          "1c81121f5d9286a5a865d01dbab22ce8",
-          "11d547f89142e9ef03f37d7ca7f32379",
-          "11d547f89142e9ef03f37d7ca7f32379"),
-      AcmReceiverBitExactnessOldApi::PlatformChecksum(
-          "4eab2259b6fe24c22dd242a113e0b3d9",
-          "4eab2259b6fe24c22dd242a113e0b3d9",
-          "839ea60399447268ee0f0262a50b75fd",
-          "1815fd5589cad0c6f6cf946c76b81aeb",
-          "1815fd5589cad0c6f6cf946c76b81aeb"),
-      50, test::AcmReceiveTestOldApi::kStereoOutput);
-}
-
 TEST_F(AcmSenderBitExactnessNewApi, OpusFromFormat_stereo_20ms_voip) {
-  const auto config = AudioEncoderOpus::SdpToConfig(
+  auto config = AudioEncoderOpus::SdpToConfig(
       SdpAudioFormat("opus", 48000, 2, {{"stereo", "1"}}));
+  // If not set, default will be kAudio in case of stereo.
+  config->application = AudioEncoderOpusConfig::ApplicationMode::kVoip;
   ASSERT_NO_FATAL_FAILURE(SetUpTestExternalEncoder(
       AudioEncoderOpus::MakeAudioEncoder(*config, 120), 120));
-  // If not set, default will be kAudio in case of stereo.
-  EXPECT_EQ(0, send_test_->acm()->SetOpusApplication(kVoip));
   Run(AcmReceiverBitExactnessOldApi::PlatformChecksum(
           "b0325df4e8104f04e03af23c0b75800e",
           "b0325df4e8104f04e03af23c0b75800e",

modules/audio_coding/include/audio_coding_module.h

@@ -625,22 +625,6 @@ class AudioCodingModule {
   //   Codec specific
   //
 
-  ///////////////////////////////////////////////////////////////////////////
-  // int SetOpusApplication()
-  // Sets the intended application if current send codec is Opus. Opus uses this
-  // to optimize the encoding for applications like VOIP and music. Currently,
-  // two modes are supported: kVoip and kAudio.
-  //
-  // Input:
-  //   - application            : intended application.
-  //
-  // Return value:
-  //   -1 if current send codec is not Opus or error occurred in setting the
-  //      Opus application mode.
-  //    0 if the Opus application mode is successfully set.
-  //
-  virtual int SetOpusApplication(OpusApplicationMode application) = 0;
-
   ///////////////////////////////////////////////////////////////////////////
   // int SetOpusMaxPlaybackRate()
   // If current send codec is Opus, informs it about maximum playback rate the