text: /*
   *  Copyright (c) 2016 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 "api/audio_codecs/builtin_audio_decoder_factory.h"
  
  #include <memory>
  
  #include "test/gtest.h"
  
  namespace webrtc {
  
  TEST(AudioDecoderFactoryTest, CreateUnknownDecoder) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("rey", 8000, 1), absl::nullopt));
  }
  
  TEST(AudioDecoderFactoryTest, CreatePcmu) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // PCMu supports 8 kHz, and any number of channels.
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcmu", 8000, 0), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcmu", 8000, 1), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcmu", 8000, 2), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcmu", 8000, 3), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcmu", 16000, 1), absl::nullopt));
  }
  
  TEST(AudioDecoderFactoryTest, CreatePcma) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // PCMa supports 8 kHz, and any number of channels.
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcma", 8000, 0), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcma", 8000, 1), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcma", 8000, 2), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcma", 8000, 3), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("pcma", 16000, 1), absl::nullopt));
  }
  
  TEST(AudioDecoderFactoryTest, CreateIlbc) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // iLBC supports 8 kHz, 1 channel.
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("ilbc", 8000, 0), absl::nullopt));
  #ifdef WEBRTC_CODEC_ILBC
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("ilbc", 8000, 1), absl::nullopt));
  #endif
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("ilbc", 8000, 2), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("ilbc", 16000, 1), absl::nullopt));
  }
  
  TEST(AudioDecoderFactoryTest, CreateIsac) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // iSAC supports 16 kHz, 1 channel. The float implementation additionally
    // supports 32 kHz, 1 channel.
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 16000, 0), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 16000, 1), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 16000, 2), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 8000, 1), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 48000, 1), absl::nullopt));
  #ifdef WEBRTC_ARCH_ARM
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 32000, 1), absl::nullopt));
  #else
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("isac", 32000, 1), absl::nullopt));
  #endif
  }
  
  TEST(AudioDecoderFactoryTest, CreateL16) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // L16 supports any clock rate and any number of channels up to 24.
    const int clockrates[] = {8000, 16000, 32000, 48000};
    const int num_channels[] = {1, 2, 3, 24};
    for (int clockrate : clockrates) {
      EXPECT_FALSE(adf->MakeAudioDecoder(SdpAudioFormat("l16", clockrate, 0),
                                         absl::nullopt));
      for (int channels : num_channels) {
        EXPECT_TRUE(adf->MakeAudioDecoder(
            SdpAudioFormat("l16", clockrate, channels), absl::nullopt));
      }
    }
  }
  
  // Tests that using more channels than the maximum does not work
  TEST(AudioDecoderFactoryTest, MaxNrOfChannels) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    std::vector<std::string> codecs = {
  #ifdef WEBRTC_CODEC_OPUS
      "opus",
  #endif
  #if defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX)
      "isac",
  #endif
  #ifdef WEBRTC_CODEC_ILBC
      "ilbc",
  #endif
      "pcmu",
      "pcma",
      "l16",
      "G722",
      "G711",
    };
  
    for (auto codec : codecs) {
      EXPECT_FALSE(adf->MakeAudioDecoder(
          SdpAudioFormat(codec, 32000, AudioDecoder::kMaxNumberOfChannels + 1),
          absl::nullopt));
    }
  }
  
  TEST(AudioDecoderFactoryTest, CreateG722) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // g722 supports 8 kHz, 1-2 channels.
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 8000, 0), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 8000, 1), absl::nullopt));
    EXPECT_TRUE(
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 8000, 2), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 8000, 3), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 16000, 1), absl::nullopt));
    EXPECT_FALSE(
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 32000, 1), absl::nullopt));
  
    // g722 actually uses a 16 kHz sample rate instead of the nominal 8 kHz.
    std::unique_ptr<AudioDecoder> dec =
        adf->MakeAudioDecoder(SdpAudioFormat("g722", 8000, 1), absl::nullopt);
    EXPECT_EQ(16000, dec->SampleRateHz());
  }
  
  TEST(AudioDecoderFactoryTest, CreateOpus) {
    rtc::scoped_refptr<AudioDecoderFactory> adf =
        CreateBuiltinAudioDecoderFactory();
    ASSERT_TRUE(adf);
    // Opus supports 48 kHz, 2 channels, and wants a "stereo" parameter whose
    // value is either "0" or "1".
    for (int hz : {8000, 16000, 32000, 48000}) {
      for (int channels : {0, 1, 2, 3}) {
        for (std::string stereo : {"XX", "0", "1", "2"}) {
          std::map<std::string, std::string> params;
          if (stereo != "XX") {
            params["stereo"] = stereo;
          }
          const bool good = (hz == 48000 && channels == 2 &&
                             (stereo == "XX" || stereo == "0" || stereo == "1"));
          EXPECT_EQ(good,
                    static_cast<bool>(adf->MakeAudioDecoder(
                        SdpAudioFormat("opus", hz, channels, std::move(params)),
                        absl::nullopt)));
        }
      }
    }
  }
  
  }  // namespace webrtc
  