blob: dcf63834ef84bb760179e776f32fdc141e14c126 [file] [log] [blame]
/*
* Copyright (c) 2015 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 <memory>
#include "webrtc/modules/audio_coding/acm2/rent_a_codec.h"
#include "webrtc/rtc_base/arraysize.h"
#include "webrtc/test/gtest.h"
#include "webrtc/test/mock_audio_encoder.h"
namespace webrtc {
namespace acm2 {
using ::testing::Return;
namespace {
const int kDataLengthSamples = 80;
const int kPacketSizeSamples = 2 * kDataLengthSamples;
const int16_t kZeroData[kDataLengthSamples] = {0};
const CodecInst kDefaultCodecInst = {0, "pcmu", 8000, kPacketSizeSamples,
1, 64000};
const int kCngPt = 13;
class Marker final {
public:
MOCK_METHOD1(Mark, void(std::string desc));
};
} // namespace
class RentACodecTestF : public ::testing::Test {
protected:
void CreateCodec() {
auto speech_encoder = rent_a_codec_.RentEncoder(kDefaultCodecInst);
ASSERT_TRUE(speech_encoder);
RentACodec::StackParameters param;
param.use_cng = true;
param.speech_encoder = std::move(speech_encoder);
encoder_ = rent_a_codec_.RentEncoderStack(&param);
}
void EncodeAndVerify(size_t expected_out_length,
uint32_t expected_timestamp,
int expected_payload_type,
int expected_send_even_if_empty) {
rtc::Buffer out;
AudioEncoder::EncodedInfo encoded_info;
encoded_info =
encoder_->Encode(timestamp_, kZeroData, &out);
timestamp_ += kDataLengthSamples;
EXPECT_TRUE(encoded_info.redundant.empty());
EXPECT_EQ(expected_out_length, encoded_info.encoded_bytes);
EXPECT_EQ(expected_timestamp, encoded_info.encoded_timestamp);
if (expected_payload_type >= 0)
EXPECT_EQ(expected_payload_type, encoded_info.payload_type);
if (expected_send_even_if_empty >= 0)
EXPECT_EQ(static_cast<bool>(expected_send_even_if_empty),
encoded_info.send_even_if_empty);
}
RentACodec rent_a_codec_;
std::unique_ptr<AudioEncoder> encoder_;
uint32_t timestamp_ = 0;
};
// This test verifies that CNG frames are delivered as expected. Since the frame
// size is set to 20 ms, we expect the first encode call to produce no output
// (which is signaled as 0 bytes output of type kNoEncoding). The next encode
// call should produce one SID frame of 9 bytes. The third call should not
// result in any output (just like the first one). The fourth and final encode
// call should produce an "empty frame", which is like no output, but with
// AudioEncoder::EncodedInfo::send_even_if_empty set to true. (The reason to
// produce an empty frame is to drive sending of DTMF packets in the RTP/RTCP
// module.)
TEST_F(RentACodecTestF, VerifyCngFrames) {
CreateCodec();
uint32_t expected_timestamp = timestamp_;
// Verify no frame.
{
SCOPED_TRACE("First encoding");
EncodeAndVerify(0, expected_timestamp, -1, -1);
}
// Verify SID frame delivered.
{
SCOPED_TRACE("Second encoding");
EncodeAndVerify(9, expected_timestamp, kCngPt, 1);
}
// Verify no frame.
{
SCOPED_TRACE("Third encoding");
EncodeAndVerify(0, expected_timestamp, -1, -1);
}
// Verify NoEncoding.
expected_timestamp += 2 * kDataLengthSamples;
{
SCOPED_TRACE("Fourth encoding");
EncodeAndVerify(0, expected_timestamp, kCngPt, 1);
}
}
TEST(RentACodecTest, ExternalEncoder) {
const int kSampleRateHz = 8000;
auto* external_encoder = new MockAudioEncoder;
EXPECT_CALL(*external_encoder, SampleRateHz())
.WillRepeatedly(Return(kSampleRateHz));
EXPECT_CALL(*external_encoder, NumChannels()).WillRepeatedly(Return(1));
EXPECT_CALL(*external_encoder, SetFec(false)).WillRepeatedly(Return(true));
RentACodec rac;
RentACodec::StackParameters param;
param.speech_encoder = std::unique_ptr<AudioEncoder>(external_encoder);
std::unique_ptr<AudioEncoder> encoder_stack = rac.RentEncoderStack(&param);
EXPECT_EQ(external_encoder, encoder_stack.get());
const int kPacketSizeSamples = kSampleRateHz / 100;
int16_t audio[kPacketSizeSamples] = {0};
rtc::Buffer encoded;
AudioEncoder::EncodedInfo info;
Marker marker;
{
::testing::InSequence s;
info.encoded_timestamp = 0;
EXPECT_CALL(
*external_encoder,
EncodeImpl(0, rtc::ArrayView<const int16_t>(audio), &encoded))
.WillOnce(Return(info));
EXPECT_CALL(marker, Mark("A"));
EXPECT_CALL(marker, Mark("B"));
EXPECT_CALL(*external_encoder, Die());
EXPECT_CALL(marker, Mark("C"));
}
info = encoder_stack->Encode(0, audio, &encoded);
EXPECT_EQ(0u, info.encoded_timestamp);
marker.Mark("A");
// Change to internal encoder.
CodecInst codec_inst = kDefaultCodecInst;
codec_inst.pacsize = kPacketSizeSamples;
param.speech_encoder = rac.RentEncoder(codec_inst);
ASSERT_TRUE(param.speech_encoder);
AudioEncoder* enc = param.speech_encoder.get();
std::unique_ptr<AudioEncoder> stack = rac.RentEncoderStack(&param);
EXPECT_EQ(enc, stack.get());
// Don't expect any more calls to the external encoder.
info = stack->Encode(1, audio, &encoded);
marker.Mark("B");
encoder_stack.reset();
marker.Mark("C");
}
// Verify that the speech encoder's Reset method is called when CNG or RED
// (or both) are switched on, but not when they're switched off.
void TestCngAndRedResetSpeechEncoder(bool use_cng, bool use_red) {
auto make_enc = [] {
auto speech_encoder =
std::unique_ptr<MockAudioEncoder>(new MockAudioEncoder);
EXPECT_CALL(*speech_encoder, NumChannels()).WillRepeatedly(Return(1));
EXPECT_CALL(*speech_encoder, Max10MsFramesInAPacket())
.WillRepeatedly(Return(2));
EXPECT_CALL(*speech_encoder, SampleRateHz()).WillRepeatedly(Return(8000));
EXPECT_CALL(*speech_encoder, SetFec(false)).WillRepeatedly(Return(true));
return speech_encoder;
};
auto speech_encoder1 = make_enc();
auto speech_encoder2 = make_enc();
Marker marker;
{
::testing::InSequence s;
EXPECT_CALL(marker, Mark("disabled"));
EXPECT_CALL(*speech_encoder1, Die());
EXPECT_CALL(marker, Mark("enabled"));
if (use_cng || use_red)
EXPECT_CALL(*speech_encoder2, Reset());
EXPECT_CALL(*speech_encoder2, Die());
}
RentACodec::StackParameters param1, param2;
param1.speech_encoder = std::move(speech_encoder1);
param2.speech_encoder = std::move(speech_encoder2);
param2.use_cng = use_cng;
param2.use_red = use_red;
marker.Mark("disabled");
RentACodec rac;
rac.RentEncoderStack(&param1);
marker.Mark("enabled");
rac.RentEncoderStack(&param2);
}
TEST(RentACodecTest, CngResetsSpeechEncoder) {
TestCngAndRedResetSpeechEncoder(true, false);
}
TEST(RentACodecTest, RedResetsSpeechEncoder) {
TestCngAndRedResetSpeechEncoder(false, true);
}
TEST(RentACodecTest, CngAndRedResetsSpeechEncoder) {
TestCngAndRedResetSpeechEncoder(true, true);
}
TEST(RentACodecTest, NoCngAndRedNoSpeechEncoderReset) {
TestCngAndRedResetSpeechEncoder(false, false);
}
TEST(RentACodecTest, RentEncoderError) {
const CodecInst codec_inst = {
0, "Robert'); DROP TABLE Students;", 8000, 160, 1, 64000};
RentACodec rent_a_codec;
EXPECT_FALSE(rent_a_codec.RentEncoder(codec_inst));
}
TEST(RentACodecTest, RentEncoderStackWithoutSpeechEncoder) {
RentACodec::StackParameters sp;
EXPECT_EQ(nullptr, sp.speech_encoder);
EXPECT_EQ(nullptr, RentACodec().RentEncoderStack(&sp));
}
} // namespace acm2
} // namespace webrtc