media/base/codec_unittest.cc - src - Git at Google

 /*
  *  Copyright (c) 2009 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 "media/base/codec.h"

 #include <optional>
 #include <string>
 #include <vector>

 #include "absl/strings/str_cat.h"
 #include "api/media_types.h"
 #include "api/rtp_parameters.h"
 #include "api/video_codecs/h264_profile_level_id.h"
 #include "api/video_codecs/sdp_video_format.h"
 #include "api/video_codecs/vp9_profile.h"
 #include "media/base/media_constants.h"
 #include "modules/video_coding/codecs/h264/include/h264.h"
 #include "test/gtest.h"

 using cricket::Codec;
 using cricket::FeedbackParam;
 using cricket::kCodecParamAssociatedPayloadType;
 using cricket::kCodecParamMaxBitrate;
 using cricket::kCodecParamMinBitrate;

 class TestCodec : public Codec {
  public:
   TestCodec(int id, const std::string& name, int clockrate)
       : Codec(Type::kAudio, id, name, clockrate) {}
   TestCodec() : Codec(Type::kAudio) {}
   TestCodec(const TestCodec& c) = default;
   TestCodec& operator=(const TestCodec& c) = default;
 };

 TEST(CodecTest, TestCodecOperators) {
   TestCodec c0(96, "D", 1000);
   c0.SetParam("a", 1);

   TestCodec c1 = c0;
   EXPECT_TRUE(c1 == c0);

   int param_value0;
   int param_value1;
   EXPECT_TRUE(c0.GetParam("a", &param_value0));
   EXPECT_TRUE(c1.GetParam("a", &param_value1));
   EXPECT_EQ(param_value0, param_value1);

   c1.id = 86;
   EXPECT_TRUE(c0 != c1);

   c1 = c0;
   c1.name = "x";
   EXPECT_TRUE(c0 != c1);

   c1 = c0;
   c1.clockrate = 2000;
   EXPECT_TRUE(c0 != c1);

   c1 = c0;
   c1.SetParam("a", 2);
   EXPECT_TRUE(c0 != c1);

   TestCodec c5;
   TestCodec c6(Codec::kIdNotSet, "", 0);
   EXPECT_TRUE(c5 == c6);
 }

 TEST(CodecTest, TestAudioCodecOperators) {
   Codec c0 = cricket::CreateAudioCodec(96, "A", 44100, 2);
   Codec c1 = cricket::CreateAudioCodec(95, "A", 44100, 2);
   Codec c2 = cricket::CreateAudioCodec(96, "x", 44100, 2);
   Codec c3 = cricket::CreateAudioCodec(96, "A", 48000, 2);
   Codec c4 = cricket::CreateAudioCodec(96, "A", 44100, 2);
   c4.bitrate = 10000;
   Codec c5 = cricket::CreateAudioCodec(96, "A", 44100, 1);
   EXPECT_NE(c0, c1);
   EXPECT_NE(c0, c2);
   EXPECT_NE(c0, c3);
   EXPECT_NE(c0, c4);
   EXPECT_NE(c0, c5);

   Codec c8 = cricket::CreateAudioCodec(0, "", 0, 0);
   Codec c9 = c0;
   EXPECT_EQ(c9, c0);

   Codec c10(c0);
   Codec c11(c0);
   Codec c12(c0);
   Codec c13(c0);
   c10.params["x"] = "abc";
   c11.params["x"] = "def";
   c12.params["y"] = "abc";
   c13.params["x"] = "abc";
   EXPECT_NE(c10, c0);
   EXPECT_NE(c11, c0);
   EXPECT_NE(c11, c10);
   EXPECT_NE(c12, c0);
   EXPECT_NE(c12, c10);
   EXPECT_NE(c12, c11);
   EXPECT_EQ(c13, c10);
 }

 TEST(CodecTest, TestVideoCodecOperators) {
   Codec c0 = cricket::CreateVideoCodec(96, "V");
   Codec c1 = cricket::CreateVideoCodec(95, "V");
   Codec c2 = cricket::CreateVideoCodec(96, "x");

   EXPECT_TRUE(c0 != c1);
   EXPECT_TRUE(c0 != c2);

   Codec c8 = cricket::CreateVideoCodec(0, "");
   Codec c9 = c0;
   EXPECT_TRUE(c9 == c0);

   Codec c10(c0);
   Codec c11(c0);
   Codec c12(c0);
   Codec c13(c0);
   c10.params["x"] = "abc";
   c11.params["x"] = "def";
   c12.params["y"] = "abc";
   c13.params["x"] = "abc";
   EXPECT_TRUE(c10 != c0);
   EXPECT_TRUE(c11 != c0);
   EXPECT_TRUE(c11 != c10);
   EXPECT_TRUE(c12 != c0);
   EXPECT_TRUE(c12 != c10);
   EXPECT_TRUE(c12 != c11);
   EXPECT_TRUE(c13 == c10);
 }

 TEST(CodecTest, TestVideoCodecEqualsWithDifferentPacketization) {
   Codec c0 = cricket::CreateVideoCodec(100, cricket::kVp8CodecName);
   Codec c1 = cricket::CreateVideoCodec(100, cricket::kVp8CodecName);
   Codec c2 = cricket::CreateVideoCodec(100, cricket::kVp8CodecName);
   c2.packetization = "raw";

   EXPECT_EQ(c0, c1);
   EXPECT_NE(c0, c2);
   EXPECT_NE(c2, c0);
   EXPECT_EQ(c2, c2);
 }


 TEST(CodecTest, TestSetParamGetParamAndRemoveParam) {
   Codec codec = cricket::CreateAudioCodec(0, "foo", 22222, 2);
   codec.SetParam("a", "1");
   codec.SetParam("b", "x");

   int int_value = 0;
   EXPECT_TRUE(codec.GetParam("a", &int_value));
   EXPECT_EQ(1, int_value);
   EXPECT_FALSE(codec.GetParam("b", &int_value));
   EXPECT_FALSE(codec.GetParam("c", &int_value));

   std::string str_value;
   EXPECT_TRUE(codec.GetParam("a", &str_value));
   EXPECT_EQ("1", str_value);
   EXPECT_TRUE(codec.GetParam("b", &str_value));
   EXPECT_EQ("x", str_value);
   EXPECT_FALSE(codec.GetParam("c", &str_value));
   EXPECT_TRUE(codec.RemoveParam("a"));
   EXPECT_FALSE(codec.RemoveParam("c"));
 }

 TEST(CodecTest, TestIntersectFeedbackParams) {
   const FeedbackParam a1("a", "1");
   const FeedbackParam b2("b", "2");
   const FeedbackParam b3("b", "3");
   const FeedbackParam c3("c", "3");
   TestCodec c1;
   c1.AddFeedbackParam(a1);  // Only match with c2.
   c1.AddFeedbackParam(b2);  // Same param different values.
   c1.AddFeedbackParam(c3);  // Not in c2.
   TestCodec c2;
   c2.AddFeedbackParam(a1);
   c2.AddFeedbackParam(b3);

   c1.IntersectFeedbackParams(c2);
   EXPECT_TRUE(c1.HasFeedbackParam(a1));
   EXPECT_FALSE(c1.HasFeedbackParam(b2));
   EXPECT_FALSE(c1.HasFeedbackParam(c3));
 }

 TEST(CodecTest, TestGetCodecType) {
   // Codec type comparison should be case insensitive on names.
   const Codec codec = cricket::CreateVideoCodec(96, "V");
   const Codec rtx_codec = cricket::CreateVideoCodec(96, "rTx");
   const Codec ulpfec_codec = cricket::CreateVideoCodec(96, "ulpFeC");
   const Codec flexfec_codec = cricket::CreateVideoCodec(96, "FlExFeC-03");
   const Codec red_codec = cricket::CreateVideoCodec(96, "ReD");
   EXPECT_TRUE(codec.IsMediaCodec());
   EXPECT_EQ(codec.GetResiliencyType(), Codec::ResiliencyType::kNone);
   EXPECT_EQ(rtx_codec.GetResiliencyType(), Codec::ResiliencyType::kRtx);
   EXPECT_EQ(ulpfec_codec.GetResiliencyType(), Codec::ResiliencyType::kUlpfec);
   EXPECT_EQ(flexfec_codec.GetResiliencyType(), Codec::ResiliencyType::kFlexfec);
   EXPECT_EQ(red_codec.GetResiliencyType(), Codec::ResiliencyType::kRed);
 }

 TEST(CodecTest, TestCreateRtxCodec) {
   const Codec rtx_codec = cricket::CreateVideoRtxCodec(96, 120);
   EXPECT_EQ(96, rtx_codec.id);
   EXPECT_EQ(rtx_codec.GetResiliencyType(), Codec::ResiliencyType::kRtx);
   int associated_payload_type;
   ASSERT_TRUE(rtx_codec.GetParam(kCodecParamAssociatedPayloadType,
                                  &associated_payload_type));
   EXPECT_EQ(120, associated_payload_type);
 }

 TEST(CodecTest, TestValidateCodecFormat) {
   const Codec codec = cricket::CreateVideoCodec(96, "V");
   ASSERT_TRUE(codec.ValidateCodecFormat());

   // Accept 0-127 as payload types.
   Codec low_payload_type = codec;
   low_payload_type.id = 0;
   Codec high_payload_type = codec;
   high_payload_type.id = 127;
   ASSERT_TRUE(low_payload_type.ValidateCodecFormat());
   EXPECT_TRUE(high_payload_type.ValidateCodecFormat());

   // Reject negative payloads.
   Codec negative_payload_type = codec;
   negative_payload_type.id = -1;
   EXPECT_FALSE(negative_payload_type.ValidateCodecFormat());

   // Reject too-high payloads.
   Codec too_high_payload_type = codec;
   too_high_payload_type.id = 128;
   EXPECT_FALSE(too_high_payload_type.ValidateCodecFormat());

   // Reject codecs with min bitrate > max bitrate.
   Codec incorrect_bitrates = codec;
   incorrect_bitrates.params[kCodecParamMinBitrate] = "100";
   incorrect_bitrates.params[kCodecParamMaxBitrate] = "80";
   EXPECT_FALSE(incorrect_bitrates.ValidateCodecFormat());

   // Accept min bitrate == max bitrate.
   Codec equal_bitrates = codec;
   equal_bitrates.params[kCodecParamMinBitrate] = "100";
   equal_bitrates.params[kCodecParamMaxBitrate] = "100";
   EXPECT_TRUE(equal_bitrates.ValidateCodecFormat());

   // Accept min bitrate < max bitrate.
   Codec different_bitrates = codec;
   different_bitrates.params[kCodecParamMinBitrate] = "99";
   different_bitrates.params[kCodecParamMaxBitrate] = "100";
   EXPECT_TRUE(different_bitrates.ValidateCodecFormat());
 }

 TEST(CodecTest, TestToCodecParameters) {
   Codec v = cricket::CreateVideoCodec(96, "V");
   v.SetParam("p1", "v1");
   webrtc::RtpCodecParameters codec_params_1 = v.ToCodecParameters();
   EXPECT_EQ(96, codec_params_1.payload_type);
   EXPECT_EQ(cricket::MEDIA_TYPE_VIDEO, codec_params_1.kind);
   EXPECT_EQ("V", codec_params_1.name);
   EXPECT_EQ(cricket::kVideoCodecClockrate, codec_params_1.clock_rate);
   EXPECT_EQ(std::nullopt, codec_params_1.num_channels);
   ASSERT_EQ(1u, codec_params_1.parameters.size());
   EXPECT_EQ("p1", codec_params_1.parameters.begin()->first);
   EXPECT_EQ("v1", codec_params_1.parameters.begin()->second);

   Codec a = cricket::CreateAudioCodec(97, "A", 44100, 2);
   a.SetParam("p1", "a1");
   webrtc::RtpCodecParameters codec_params_2 = a.ToCodecParameters();
   EXPECT_EQ(97, codec_params_2.payload_type);
   EXPECT_EQ(cricket::MEDIA_TYPE_AUDIO, codec_params_2.kind);
   EXPECT_EQ("A", codec_params_2.name);
   EXPECT_EQ(44100, codec_params_2.clock_rate);
   EXPECT_EQ(2, codec_params_2.num_channels);
   ASSERT_EQ(1u, codec_params_2.parameters.size());
   EXPECT_EQ("p1", codec_params_2.parameters.begin()->first);
   EXPECT_EQ("a1", codec_params_2.parameters.begin()->second);
 }

 TEST(CodecTest, H264CostrainedBaselineIsAddedIfH264IsSupported) {
   const std::vector<webrtc::SdpVideoFormat> kExplicitlySupportedFormats = {
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
                                webrtc::H264Level::kLevel3_1, "1"),
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
                                webrtc::H264Level::kLevel3_1, "0")};

   std::vector<webrtc::SdpVideoFormat> supported_formats =
       kExplicitlySupportedFormats;
   cricket::AddH264ConstrainedBaselineProfileToSupportedFormats(
       &supported_formats);

   const webrtc::SdpVideoFormat kH264ConstrainedBasedlinePacketization1 =
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
                                webrtc::H264Level::kLevel3_1, "1");
   const webrtc::SdpVideoFormat kH264ConstrainedBasedlinePacketization0 =
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
                                webrtc::H264Level::kLevel3_1, "0");

   EXPECT_EQ(supported_formats[0], kExplicitlySupportedFormats[0]);
   EXPECT_EQ(supported_formats[1], kExplicitlySupportedFormats[1]);
   EXPECT_EQ(supported_formats[2], kH264ConstrainedBasedlinePacketization1);
   EXPECT_EQ(supported_formats[3], kH264ConstrainedBasedlinePacketization0);
 }

 TEST(CodecTest, H264CostrainedBaselineIsNotAddedIfH264IsUnsupported) {
   const std::vector<webrtc::SdpVideoFormat> kExplicitlySupportedFormats = {
       {cricket::kVp9CodecName,
        {{webrtc::kVP9FmtpProfileId,
          VP9ProfileToString(webrtc::VP9Profile::kProfile0)}}}};

   std::vector<webrtc::SdpVideoFormat> supported_formats =
       kExplicitlySupportedFormats;
   cricket::AddH264ConstrainedBaselineProfileToSupportedFormats(
       &supported_formats);

   EXPECT_EQ(supported_formats[0], kExplicitlySupportedFormats[0]);
   EXPECT_EQ(supported_formats.size(), kExplicitlySupportedFormats.size());
 }

 TEST(CodecTest, H264CostrainedBaselineNotAddedIfAlreadySpecified) {
   const std::vector<webrtc::SdpVideoFormat> kExplicitlySupportedFormats = {
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
                                webrtc::H264Level::kLevel3_1, "1"),
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
                                webrtc::H264Level::kLevel3_1, "0"),
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
                                webrtc::H264Level::kLevel3_1, "1"),
       webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
                                webrtc::H264Level::kLevel3_1, "0")};

   std::vector<webrtc::SdpVideoFormat> supported_formats =
       kExplicitlySupportedFormats;
   cricket::AddH264ConstrainedBaselineProfileToSupportedFormats(
       &supported_formats);

   EXPECT_EQ(supported_formats[0], kExplicitlySupportedFormats[0]);
   EXPECT_EQ(supported_formats[1], kExplicitlySupportedFormats[1]);
   EXPECT_EQ(supported_formats[2], kExplicitlySupportedFormats[2]);
   EXPECT_EQ(supported_formats[3], kExplicitlySupportedFormats[3]);
   EXPECT_EQ(supported_formats.size(), kExplicitlySupportedFormats.size());
 }

 TEST(CodecTest, AbslStringify) {
   Codec codec = cricket::CreateAudioCodec(47, "custom-audio", 48000, 2);
   EXPECT_EQ(absl::StrCat(codec), "[47:audio/custom-audio/48000/2]");
   codec.params["key"] = "value";
   EXPECT_EQ(absl::StrCat(codec), "[47:audio/custom-audio/48000/2;key=value]");
 }
	/*
	* Copyright (c) 2009 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 "media/base/codec.h"

	#include <optional>
	#include <string>
	#include <vector>

	#include "absl/strings/str_cat.h"
	#include "api/media_types.h"
	#include "api/rtp_parameters.h"
	#include "api/video_codecs/h264_profile_level_id.h"
	#include "api/video_codecs/sdp_video_format.h"
	#include "api/video_codecs/vp9_profile.h"
	#include "media/base/media_constants.h"
	#include "modules/video_coding/codecs/h264/include/h264.h"
	#include "test/gtest.h"

	using cricket::Codec;
	using cricket::FeedbackParam;
	using cricket::kCodecParamAssociatedPayloadType;
	using cricket::kCodecParamMaxBitrate;
	using cricket::kCodecParamMinBitrate;

	class TestCodec : public Codec {
	public:
	TestCodec(int id, const std::string& name, int clockrate)
	: Codec(Type::kAudio, id, name, clockrate) {}
	TestCodec() : Codec(Type::kAudio) {}
	TestCodec(const TestCodec& c) = default;
	TestCodec& operator=(const TestCodec& c) = default;
	};

	TEST(CodecTest, TestCodecOperators) {
	TestCodec c0(96, "D", 1000);
	c0.SetParam("a", 1);

	TestCodec c1 = c0;
	EXPECT_TRUE(c1 == c0);

	int param_value0;
	int param_value1;
	EXPECT_TRUE(c0.GetParam("a", &param_value0));
	EXPECT_TRUE(c1.GetParam("a", &param_value1));
	EXPECT_EQ(param_value0, param_value1);

	c1.id = 86;
	EXPECT_TRUE(c0 != c1);

	c1 = c0;
	c1.name = "x";
	EXPECT_TRUE(c0 != c1);

	c1 = c0;
	c1.clockrate = 2000;
	EXPECT_TRUE(c0 != c1);

	c1 = c0;
	c1.SetParam("a", 2);
	EXPECT_TRUE(c0 != c1);

	TestCodec c5;
	TestCodec c6(Codec::kIdNotSet, "", 0);
	EXPECT_TRUE(c5 == c6);
	}

	TEST(CodecTest, TestAudioCodecOperators) {
	Codec c0 = cricket::CreateAudioCodec(96, "A", 44100, 2);
	Codec c1 = cricket::CreateAudioCodec(95, "A", 44100, 2);
	Codec c2 = cricket::CreateAudioCodec(96, "x", 44100, 2);
	Codec c3 = cricket::CreateAudioCodec(96, "A", 48000, 2);
	Codec c4 = cricket::CreateAudioCodec(96, "A", 44100, 2);
	c4.bitrate = 10000;
	Codec c5 = cricket::CreateAudioCodec(96, "A", 44100, 1);
	EXPECT_NE(c0, c1);
	EXPECT_NE(c0, c2);
	EXPECT_NE(c0, c3);
	EXPECT_NE(c0, c4);
	EXPECT_NE(c0, c5);

	Codec c8 = cricket::CreateAudioCodec(0, "", 0, 0);
	Codec c9 = c0;
	EXPECT_EQ(c9, c0);

	Codec c10(c0);
	Codec c11(c0);
	Codec c12(c0);
	Codec c13(c0);
	c10.params["x"] = "abc";
	c11.params["x"] = "def";
	c12.params["y"] = "abc";
	c13.params["x"] = "abc";
	EXPECT_NE(c10, c0);
	EXPECT_NE(c11, c0);
	EXPECT_NE(c11, c10);
	EXPECT_NE(c12, c0);
	EXPECT_NE(c12, c10);
	EXPECT_NE(c12, c11);
	EXPECT_EQ(c13, c10);
	}

	TEST(CodecTest, TestVideoCodecOperators) {
	Codec c0 = cricket::CreateVideoCodec(96, "V");
	Codec c1 = cricket::CreateVideoCodec(95, "V");
	Codec c2 = cricket::CreateVideoCodec(96, "x");

	EXPECT_TRUE(c0 != c1);
	EXPECT_TRUE(c0 != c2);

	Codec c8 = cricket::CreateVideoCodec(0, "");
	Codec c9 = c0;
	EXPECT_TRUE(c9 == c0);

	Codec c10(c0);
	Codec c11(c0);
	Codec c12(c0);
	Codec c13(c0);
	c10.params["x"] = "abc";
	c11.params["x"] = "def";
	c12.params["y"] = "abc";
	c13.params["x"] = "abc";
	EXPECT_TRUE(c10 != c0);
	EXPECT_TRUE(c11 != c0);
	EXPECT_TRUE(c11 != c10);
	EXPECT_TRUE(c12 != c0);
	EXPECT_TRUE(c12 != c10);
	EXPECT_TRUE(c12 != c11);
	EXPECT_TRUE(c13 == c10);
	}

	TEST(CodecTest, TestVideoCodecEqualsWithDifferentPacketization) {
	Codec c0 = cricket::CreateVideoCodec(100, cricket::kVp8CodecName);
	Codec c1 = cricket::CreateVideoCodec(100, cricket::kVp8CodecName);
	Codec c2 = cricket::CreateVideoCodec(100, cricket::kVp8CodecName);
	c2.packetization = "raw";

	EXPECT_EQ(c0, c1);
	EXPECT_NE(c0, c2);
	EXPECT_NE(c2, c0);
	EXPECT_EQ(c2, c2);
	}


	TEST(CodecTest, TestSetParamGetParamAndRemoveParam) {
	Codec codec = cricket::CreateAudioCodec(0, "foo", 22222, 2);
	codec.SetParam("a", "1");
	codec.SetParam("b", "x");

	int int_value = 0;
	EXPECT_TRUE(codec.GetParam("a", &int_value));
	EXPECT_EQ(1, int_value);
	EXPECT_FALSE(codec.GetParam("b", &int_value));
	EXPECT_FALSE(codec.GetParam("c", &int_value));

	std::string str_value;
	EXPECT_TRUE(codec.GetParam("a", &str_value));
	EXPECT_EQ("1", str_value);
	EXPECT_TRUE(codec.GetParam("b", &str_value));
	EXPECT_EQ("x", str_value);
	EXPECT_FALSE(codec.GetParam("c", &str_value));
	EXPECT_TRUE(codec.RemoveParam("a"));
	EXPECT_FALSE(codec.RemoveParam("c"));
	}

	TEST(CodecTest, TestIntersectFeedbackParams) {
	const FeedbackParam a1("a", "1");
	const FeedbackParam b2("b", "2");
	const FeedbackParam b3("b", "3");
	const FeedbackParam c3("c", "3");
	TestCodec c1;
	c1.AddFeedbackParam(a1); // Only match with c2.
	c1.AddFeedbackParam(b2); // Same param different values.
	c1.AddFeedbackParam(c3); // Not in c2.
	TestCodec c2;
	c2.AddFeedbackParam(a1);
	c2.AddFeedbackParam(b3);

	c1.IntersectFeedbackParams(c2);
	EXPECT_TRUE(c1.HasFeedbackParam(a1));
	EXPECT_FALSE(c1.HasFeedbackParam(b2));
	EXPECT_FALSE(c1.HasFeedbackParam(c3));
	}

	TEST(CodecTest, TestGetCodecType) {
	// Codec type comparison should be case insensitive on names.
	const Codec codec = cricket::CreateVideoCodec(96, "V");
	const Codec rtx_codec = cricket::CreateVideoCodec(96, "rTx");
	const Codec ulpfec_codec = cricket::CreateVideoCodec(96, "ulpFeC");
	const Codec flexfec_codec = cricket::CreateVideoCodec(96, "FlExFeC-03");
	const Codec red_codec = cricket::CreateVideoCodec(96, "ReD");
	EXPECT_TRUE(codec.IsMediaCodec());
	EXPECT_EQ(codec.GetResiliencyType(), Codec::ResiliencyType::kNone);
	EXPECT_EQ(rtx_codec.GetResiliencyType(), Codec::ResiliencyType::kRtx);
	EXPECT_EQ(ulpfec_codec.GetResiliencyType(), Codec::ResiliencyType::kUlpfec);
	EXPECT_EQ(flexfec_codec.GetResiliencyType(), Codec::ResiliencyType::kFlexfec);
	EXPECT_EQ(red_codec.GetResiliencyType(), Codec::ResiliencyType::kRed);
	}

	TEST(CodecTest, TestCreateRtxCodec) {
	const Codec rtx_codec = cricket::CreateVideoRtxCodec(96, 120);
	EXPECT_EQ(96, rtx_codec.id);
	EXPECT_EQ(rtx_codec.GetResiliencyType(), Codec::ResiliencyType::kRtx);
	int associated_payload_type;
	ASSERT_TRUE(rtx_codec.GetParam(kCodecParamAssociatedPayloadType,
	&associated_payload_type));
	EXPECT_EQ(120, associated_payload_type);
	}

	TEST(CodecTest, TestValidateCodecFormat) {
	const Codec codec = cricket::CreateVideoCodec(96, "V");
	ASSERT_TRUE(codec.ValidateCodecFormat());

	// Accept 0-127 as payload types.
	Codec low_payload_type = codec;
	low_payload_type.id = 0;
	Codec high_payload_type = codec;
	high_payload_type.id = 127;
	ASSERT_TRUE(low_payload_type.ValidateCodecFormat());
	EXPECT_TRUE(high_payload_type.ValidateCodecFormat());

	// Reject negative payloads.
	Codec negative_payload_type = codec;
	negative_payload_type.id = -1;
	EXPECT_FALSE(negative_payload_type.ValidateCodecFormat());

	// Reject too-high payloads.
	Codec too_high_payload_type = codec;
	too_high_payload_type.id = 128;
	EXPECT_FALSE(too_high_payload_type.ValidateCodecFormat());

	// Reject codecs with min bitrate > max bitrate.
	Codec incorrect_bitrates = codec;
	incorrect_bitrates.params[kCodecParamMinBitrate] = "100";
	incorrect_bitrates.params[kCodecParamMaxBitrate] = "80";
	EXPECT_FALSE(incorrect_bitrates.ValidateCodecFormat());

	// Accept min bitrate == max bitrate.
	Codec equal_bitrates = codec;
	equal_bitrates.params[kCodecParamMinBitrate] = "100";
	equal_bitrates.params[kCodecParamMaxBitrate] = "100";
	EXPECT_TRUE(equal_bitrates.ValidateCodecFormat());

	// Accept min bitrate < max bitrate.
	Codec different_bitrates = codec;
	different_bitrates.params[kCodecParamMinBitrate] = "99";
	different_bitrates.params[kCodecParamMaxBitrate] = "100";
	EXPECT_TRUE(different_bitrates.ValidateCodecFormat());
	}

	TEST(CodecTest, TestToCodecParameters) {
	Codec v = cricket::CreateVideoCodec(96, "V");
	v.SetParam("p1", "v1");
	webrtc::RtpCodecParameters codec_params_1 = v.ToCodecParameters();
	EXPECT_EQ(96, codec_params_1.payload_type);
	EXPECT_EQ(cricket::MEDIA_TYPE_VIDEO, codec_params_1.kind);
	EXPECT_EQ("V", codec_params_1.name);
	EXPECT_EQ(cricket::kVideoCodecClockrate, codec_params_1.clock_rate);
	EXPECT_EQ(std::nullopt, codec_params_1.num_channels);
	ASSERT_EQ(1u, codec_params_1.parameters.size());
	EXPECT_EQ("p1", codec_params_1.parameters.begin()->first);
	EXPECT_EQ("v1", codec_params_1.parameters.begin()->second);

	Codec a = cricket::CreateAudioCodec(97, "A", 44100, 2);
	a.SetParam("p1", "a1");
	webrtc::RtpCodecParameters codec_params_2 = a.ToCodecParameters();
	EXPECT_EQ(97, codec_params_2.payload_type);
	EXPECT_EQ(cricket::MEDIA_TYPE_AUDIO, codec_params_2.kind);
	EXPECT_EQ("A", codec_params_2.name);
	EXPECT_EQ(44100, codec_params_2.clock_rate);
	EXPECT_EQ(2, codec_params_2.num_channels);
	ASSERT_EQ(1u, codec_params_2.parameters.size());
	EXPECT_EQ("p1", codec_params_2.parameters.begin()->first);
	EXPECT_EQ("a1", codec_params_2.parameters.begin()->second);
	}

	TEST(CodecTest, H264CostrainedBaselineIsAddedIfH264IsSupported) {
	const std::vector<webrtc::SdpVideoFormat> kExplicitlySupportedFormats = {
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
	webrtc::H264Level::kLevel3_1, "1"),
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
	webrtc::H264Level::kLevel3_1, "0")};

	std::vector<webrtc::SdpVideoFormat> supported_formats =
	kExplicitlySupportedFormats;
	cricket::AddH264ConstrainedBaselineProfileToSupportedFormats(
	&supported_formats);

	const webrtc::SdpVideoFormat kH264ConstrainedBasedlinePacketization1 =
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
	webrtc::H264Level::kLevel3_1, "1");
	const webrtc::SdpVideoFormat kH264ConstrainedBasedlinePacketization0 =
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
	webrtc::H264Level::kLevel3_1, "0");

	EXPECT_EQ(supported_formats[0], kExplicitlySupportedFormats[0]);
	EXPECT_EQ(supported_formats[1], kExplicitlySupportedFormats[1]);
	EXPECT_EQ(supported_formats[2], kH264ConstrainedBasedlinePacketization1);
	EXPECT_EQ(supported_formats[3], kH264ConstrainedBasedlinePacketization0);
	}

	TEST(CodecTest, H264CostrainedBaselineIsNotAddedIfH264IsUnsupported) {
	const std::vector<webrtc::SdpVideoFormat> kExplicitlySupportedFormats = {
	{cricket::kVp9CodecName,
	{{webrtc::kVP9FmtpProfileId,
	VP9ProfileToString(webrtc::VP9Profile::kProfile0)}}}};

	std::vector<webrtc::SdpVideoFormat> supported_formats =
	kExplicitlySupportedFormats;
	cricket::AddH264ConstrainedBaselineProfileToSupportedFormats(
	&supported_formats);

	EXPECT_EQ(supported_formats[0], kExplicitlySupportedFormats[0]);
	EXPECT_EQ(supported_formats.size(), kExplicitlySupportedFormats.size());
	}

	TEST(CodecTest, H264CostrainedBaselineNotAddedIfAlreadySpecified) {
	const std::vector<webrtc::SdpVideoFormat> kExplicitlySupportedFormats = {
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
	webrtc::H264Level::kLevel3_1, "1"),
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileBaseline,
	webrtc::H264Level::kLevel3_1, "0"),
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
	webrtc::H264Level::kLevel3_1, "1"),
	webrtc::CreateH264Format(webrtc::H264Profile::kProfileConstrainedBaseline,
	webrtc::H264Level::kLevel3_1, "0")};

	std::vector<webrtc::SdpVideoFormat> supported_formats =
	kExplicitlySupportedFormats;
	cricket::AddH264ConstrainedBaselineProfileToSupportedFormats(
	&supported_formats);

	EXPECT_EQ(supported_formats[0], kExplicitlySupportedFormats[0]);
	EXPECT_EQ(supported_formats[1], kExplicitlySupportedFormats[1]);
	EXPECT_EQ(supported_formats[2], kExplicitlySupportedFormats[2]);
	EXPECT_EQ(supported_formats[3], kExplicitlySupportedFormats[3]);
	EXPECT_EQ(supported_formats.size(), kExplicitlySupportedFormats.size());
	}

	TEST(CodecTest, AbslStringify) {
	Codec codec = cricket::CreateAudioCodec(47, "custom-audio", 48000, 2);
	EXPECT_EQ(absl::StrCat(codec), "[47:audio/custom-audio/48000/2]");
	codec.params["key"] = "value";
	EXPECT_EQ(absl::StrCat(codec), "[47:audio/custom-audio/48000/2;key=value]");
	}