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/*
* Copyright 2004 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 "pc/codec_vendor.h"
#include <stddef.h>
#include <memory>
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/environment/environment.h"
#include "api/environment/environment_factory.h"
#include "api/field_trials.h"
#include "api/media_types.h"
#include "api/rtc_error.h"
#include "api/rtp_transceiver_direction.h"
#include "api/test/rtc_error_matchers.h"
#include "call/fake_payload_type_suggester.h"
#include "media/base/codec.h"
#include "media/base/codec_list.h"
#include "media/base/fake_media_engine.h"
#include "media/base/media_constants.h"
#include "media/base/test_utils.h"
#include "pc/media_options.h"
#include "pc/rtp_parameters_conversion.h"
#include "pc/session_description.h"
#include "rtc_base/checks.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
using testing::Contains;
using testing::Eq;
using testing::Field;
Codec CreateRedAudioCodec(absl::string_view encoding_id) {
Codec red = CreateAudioCodec(63, "red", 48000, 2);
red.SetParam(kCodecParamNotInNameValueFormat,
std::string(encoding_id) + '/' + std::string(encoding_id));
return red;
}
const Codec kAudioCodecs1[] = {CreateAudioCodec(111, "opus", 48000, 2),
CreateRedAudioCodec("111"),
CreateAudioCodec(102, "G722", 16000, 1),
CreateAudioCodec(0, "PCMU", 8000, 1),
CreateAudioCodec(8, "PCMA", 8000, 1),
CreateAudioCodec(107, "CN", 48000, 1)};
const Codec kAudioCodecs2[] = {
CreateAudioCodec(126, "foo", 16000, 1),
CreateAudioCodec(0, "PCMU", 8000, 1),
CreateAudioCodec(127, "G722", 16000, 1),
};
const Codec kAudioCodecsAnswer[] = {
CreateAudioCodec(102, "G722", 16000, 1),
CreateAudioCodec(0, "PCMU", 8000, 1),
};
TEST(CodecVendorTest, TestSetAudioCodecs) {
std::unique_ptr<FieldTrials> trials = FieldTrials::CreateNoGlobal("");
CodecVendor codec_vendor(nullptr, false, *trials);
std::vector<Codec> send_codecs = MAKE_VECTOR(kAudioCodecs1);
std::vector<Codec> recv_codecs = MAKE_VECTOR(kAudioCodecs2);
// The merged list of codecs should contain any send codecs that are also
// nominally in the receive codecs list. Payload types should be picked from
// the send codecs and a number-of-channels of 0 and 1 should be equivalent
// (set to 1). This equals what happens when the send codecs are used in an
// offer and the receive codecs are used in the following answer.
const std::vector<Codec> sendrecv_codecs = MAKE_VECTOR(kAudioCodecsAnswer);
CodecList no_codecs;
RTC_CHECK_EQ(send_codecs[2].name, "G722")
<< "Please don't change shared test data!";
RTC_CHECK_EQ(recv_codecs[2].name, "G722")
<< "Please don't change shared test data!";
// Alter iLBC send codec to have zero channels, to test that that is handled
// properly.
send_codecs[2].channels = 0;
// Alter PCMU receive codec to be lowercase, to test that case conversions
// are handled properly.
recv_codecs[1].name = "pcmu";
// Test proper merge
codec_vendor.set_audio_codecs(CodecList::CreateFromTrustedData(send_codecs),
CodecList::CreateFromTrustedData(recv_codecs));
EXPECT_EQ(send_codecs, codec_vendor.audio_send_codecs().codecs());
EXPECT_EQ(recv_codecs, codec_vendor.audio_recv_codecs().codecs());
EXPECT_EQ(sendrecv_codecs, codec_vendor.audio_sendrecv_codecs().codecs());
// Test empty send codecs list
codec_vendor.set_audio_codecs(no_codecs,
CodecList::CreateFromTrustedData(recv_codecs));
EXPECT_EQ(no_codecs.codecs(), codec_vendor.audio_send_codecs().codecs());
EXPECT_EQ(recv_codecs, codec_vendor.audio_recv_codecs().codecs());
EXPECT_EQ(no_codecs.codecs(), codec_vendor.audio_sendrecv_codecs().codecs());
// Test empty recv codecs list
codec_vendor.set_audio_codecs(CodecList::CreateFromTrustedData(send_codecs),
no_codecs);
EXPECT_EQ(send_codecs, codec_vendor.audio_send_codecs().codecs());
EXPECT_EQ(no_codecs.codecs(), codec_vendor.audio_recv_codecs().codecs());
EXPECT_EQ(no_codecs.codecs(), codec_vendor.audio_sendrecv_codecs().codecs());
// Test all empty codec lists
codec_vendor.set_audio_codecs(no_codecs, no_codecs);
EXPECT_EQ(no_codecs, codec_vendor.audio_send_codecs());
EXPECT_EQ(no_codecs, codec_vendor.audio_recv_codecs());
EXPECT_EQ(no_codecs, codec_vendor.audio_sendrecv_codecs());
}
TEST(CodecVendorTest, VideoRtxIsIncludedWhenAskedFor) {
Environment env = CreateEnvironment();
FakeMediaEngine media_engine;
std::vector<Codec> video_codecs({
CreateVideoCodec(97, "vp8"),
CreateVideoRtxCodec(98, 97),
});
FakePayloadTypeSuggester pt_suggester;
media_engine.SetVideoSendCodecs(video_codecs);
CodecVendor codec_vendor(&media_engine, /* rtx_enabled= */ true,
env.field_trials());
RTCErrorOr<std::vector<Codec>> offered_codecs =
codec_vendor.GetNegotiatedCodecsForOffer(
MediaDescriptionOptions(MediaType::VIDEO, "mid",
RtpTransceiverDirection::kSendOnly, false),
MediaSessionOptions(), nullptr, pt_suggester);
EXPECT_THAT(offered_codecs.value(),
Contains(Field("name", &Codec::name, "rtx")));
}
TEST(CodecVendorTest, VideoRtxIsExcludedWhenNotAskedFor) {
Environment env = CreateEnvironment();
FakeMediaEngine media_engine;
std::vector<Codec> video_codecs({
CreateVideoCodec(97, "vp8"),
CreateVideoRtxCodec(98, 97),
});
FakePayloadTypeSuggester pt_suggester;
media_engine.SetVideoSendCodecs(video_codecs);
CodecVendor codec_vendor(&media_engine, /* rtx_enabled= */ false,
env.field_trials());
RTCErrorOr<std::vector<Codec>> offered_codecs =
codec_vendor.GetNegotiatedCodecsForOffer(
MediaDescriptionOptions(MediaType::VIDEO, "mid",
RtpTransceiverDirection::kSendOnly, false),
MediaSessionOptions(), nullptr, pt_suggester);
EXPECT_THAT(offered_codecs.value(),
Not(Contains(Field("name", &Codec::name, "rtx"))));
}
TEST(CodecVendorTest, PreferencesAffectCodecChoice) {
Environment env = CreateEnvironment();
FakeMediaEngine media_engine;
std::vector<Codec> video_codecs({
CreateVideoCodec(97, "vp8"),
CreateVideoRtxCodec(98, 97),
CreateVideoCodec(99, "vp9"),
CreateVideoRtxCodec(100, 99),
});
media_engine.SetVideoSendCodecs(video_codecs);
CodecVendor codec_vendor(&media_engine, /* rtx_enabled= */ false,
env.field_trials());
MediaDescriptionOptions options(MediaType::VIDEO, "mid",
RtpTransceiverDirection::kSendOnly, false);
options.codec_preferences = {
ToRtpCodecCapability(CreateVideoCodec(-1, "vp9")),
};
FakePayloadTypeSuggester pt_suggester;
RTCErrorOr<std::vector<Codec>> offered_codecs =
codec_vendor.GetNegotiatedCodecsForOffer(options, MediaSessionOptions(),
nullptr, pt_suggester);
ASSERT_TRUE(offered_codecs.ok());
EXPECT_THAT(offered_codecs.value(),
Contains(Field("name", &Codec::name, "vp9")));
EXPECT_THAT(offered_codecs.value(),
Not(Contains(Field("name", &Codec::name, "vp8"))));
EXPECT_THAT(offered_codecs.value().size(), Eq(1));
}
TEST(CodecVendorTest, GetNegotiatedCodecsForAnswerSimple) {
Environment env = CreateEnvironment();
FakeMediaEngine media_engine;
std::vector<Codec> video_codecs({
CreateVideoCodec(97, "vp8"),
CreateVideoRtxCodec(98, 97),
CreateVideoCodec(99, "vp9"),
CreateVideoRtxCodec(100, 99),
});
media_engine.SetVideoSendCodecs(video_codecs);
CodecVendor codec_vendor(&media_engine, /* rtx_enabled= */ true,
env.field_trials());
MediaDescriptionOptions options(MediaType::VIDEO, "mid",
RtpTransceiverDirection::kSendOnly, false);
FakePayloadTypeSuggester pt_suggester;
ContentInfo* current_content = nullptr;
RTCErrorOr<std::vector<Codec>> answered_codecs =
codec_vendor.GetNegotiatedCodecsForAnswer(
options, MediaSessionOptions(), RtpTransceiverDirection::kSendOnly,
RtpTransceiverDirection::kSendOnly, current_content, video_codecs,
pt_suggester);
EXPECT_THAT(answered_codecs, IsRtcOkAndHolds(video_codecs));
}
TEST(CodecVendorTest, GetNegotiatedCodecsForAnswerWithCollision) {
Environment env = CreateEnvironment();
FakeMediaEngine media_engine;
std::vector<Codec> video_codecs({
CreateVideoCodec(97, "vp8"),
CreateVideoCodec(99, "vp9"),
CreateVideoCodec(101, "av1"),
});
std::vector<Codec> remote_codecs({
CreateVideoCodec(97, "av1"),
CreateVideoCodec(99, "vp9"),
});
media_engine.SetVideoSendCodecs(video_codecs);
CodecVendor codec_vendor(&media_engine, /* rtx_enabled= */ false,
env.field_trials());
MediaDescriptionOptions options(MediaType::VIDEO, "mid",
RtpTransceiverDirection::kSendOnly, false);
FakePayloadTypeSuggester pt_suggester;
ContentInfo* current_content = nullptr;
RTCErrorOr<std::vector<Codec>> answered_codecs =
codec_vendor.GetNegotiatedCodecsForAnswer(
options, MediaSessionOptions(), RtpTransceiverDirection::kSendOnly,
RtpTransceiverDirection::kSendOnly, current_content, remote_codecs,
pt_suggester);
EXPECT_THAT(answered_codecs, IsRtcOkAndHolds(remote_codecs));
}
} // namespace
} // namespace webrtc
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