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308 lines
10 KiB
C++
308 lines
10 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/audio_coding/neteq/dtmf_buffer.h"
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#ifdef WIN32
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#include <winsock2.h> // ntohl()
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#else
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#include <arpa/inet.h> // ntohl()
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#endif
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#include <iostream>
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#include "gtest/gtest.h"
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// Modify the tests so that they pass with the modifications done to DtmfBuffer
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// for backwards bit-exactness. Once bit-exactness is no longer required, this
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// #define should be removed (and the code that it enables).
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#define LEGACY_BITEXACT
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namespace webrtc {
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static int sample_rate_hz = 8000;
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static uint32_t MakeDtmfPayload(int event, bool end, int volume, int duration) {
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uint32_t payload = 0;
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// 0 1 2 3
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// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | event |E|R| volume | duration |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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payload |= (event & 0x00FF) << 24;
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payload |= (end ? 0x00800000 : 0x00000000);
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payload |= (volume & 0x003F) << 16;
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payload |= (duration & 0xFFFF);
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payload = ntohl(payload);
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return payload;
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}
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static bool EqualEvents(const DtmfEvent& a,
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const DtmfEvent& b) {
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return (a.duration == b.duration
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&& a.end_bit == b.end_bit
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&& a.event_no == b.event_no
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&& a.timestamp == b.timestamp
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&& a.volume == b.volume);
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}
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TEST(DtmfBuffer, CreateAndDestroy) {
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DtmfBuffer* buffer = new DtmfBuffer(sample_rate_hz);
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delete buffer;
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}
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// Test the event parser.
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TEST(DtmfBuffer, ParseEvent) {
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int event_no = 7;
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bool end_bit = true;
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int volume = 17;
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int duration = 4711;
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uint32_t timestamp = 0x12345678;
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uint32_t payload = MakeDtmfPayload(event_no, end_bit, volume, duration);
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uint8_t* payload_ptr = reinterpret_cast<uint8_t*>(&payload);
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DtmfEvent event;
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EXPECT_EQ(DtmfBuffer::kOK,
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DtmfBuffer::ParseEvent(timestamp, payload_ptr, sizeof(payload),
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&event));
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EXPECT_EQ(duration, event.duration);
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EXPECT_EQ(end_bit, event.end_bit);
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EXPECT_EQ(event_no, event.event_no);
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EXPECT_EQ(timestamp, event.timestamp);
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EXPECT_EQ(volume, event.volume);
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EXPECT_EQ(DtmfBuffer::kInvalidPointer,
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DtmfBuffer::ParseEvent(timestamp, NULL, 4, &event));
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EXPECT_EQ(DtmfBuffer::kInvalidPointer,
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DtmfBuffer::ParseEvent(timestamp, payload_ptr, 4, NULL));
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EXPECT_EQ(DtmfBuffer::kPayloadTooShort,
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DtmfBuffer::ParseEvent(timestamp, payload_ptr, 3, &event));
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}
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TEST(DtmfBuffer, SimpleInsertAndGet) {
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int event_no = 7;
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bool end_bit = true;
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int volume = 17;
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int duration = 4711;
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uint32_t timestamp = 0x12345678;
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DtmfEvent event(timestamp, event_no, volume, duration, end_bit);
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DtmfBuffer buffer(sample_rate_hz);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
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EXPECT_EQ(1u, buffer.Length());
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EXPECT_FALSE(buffer.Empty());
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DtmfEvent out_event;
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// Too early to get event.
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EXPECT_FALSE(buffer.GetEvent(timestamp - 10, &out_event));
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EXPECT_EQ(1u, buffer.Length());
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EXPECT_FALSE(buffer.Empty());
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// Get the event at its starting timestamp.
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EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
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EXPECT_TRUE(EqualEvents(event, out_event));
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EXPECT_EQ(1u, buffer.Length());
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EXPECT_FALSE(buffer.Empty());
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// Get the event some time into the event.
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EXPECT_TRUE(buffer.GetEvent(timestamp + duration / 2, &out_event));
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EXPECT_TRUE(EqualEvents(event, out_event));
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EXPECT_EQ(1u, buffer.Length());
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EXPECT_FALSE(buffer.Empty());
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// Give a "current" timestamp after the event has ended.
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#ifdef LEGACY_BITEXACT
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EXPECT_TRUE(buffer.GetEvent(timestamp + duration + 10, &out_event));
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#endif
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EXPECT_FALSE(buffer.GetEvent(timestamp + duration + 10, &out_event));
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EXPECT_EQ(0u, buffer.Length());
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EXPECT_TRUE(buffer.Empty());
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}
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TEST(DtmfBuffer, MergingPackets) {
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int event_no = 0;
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bool end_bit = false;
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int volume = 17;
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int duration = 80;
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uint32_t timestamp = 0x12345678;
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DtmfEvent event(timestamp, event_no, volume, duration, end_bit);
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DtmfBuffer buffer(sample_rate_hz);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
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event.duration += 80;
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
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event.duration += 80;
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event.end_bit = true;
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
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EXPECT_EQ(1u, buffer.Length());
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DtmfEvent out_event;
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EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
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EXPECT_TRUE(EqualEvents(event, out_event));
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}
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// This test case inserts one shorter event completely overlapped by one longer
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// event. The expected outcome is that only the longer event is played.
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TEST(DtmfBuffer, OverlappingEvents) {
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int event_no = 0;
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bool end_bit = true;
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int volume = 1;
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int duration = 80;
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uint32_t timestamp = 0x12345678 + 80;
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DtmfEvent short_event(timestamp, event_no, volume, duration, end_bit);
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DtmfBuffer buffer(sample_rate_hz);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(short_event));
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event_no = 10;
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end_bit = false;
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timestamp = 0x12345678;
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DtmfEvent long_event(timestamp, event_no, volume, duration, end_bit);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(long_event));
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long_event.duration += 80;
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(long_event));
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long_event.duration += 80;
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long_event.end_bit = true;
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(long_event));
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EXPECT_EQ(2u, buffer.Length());
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DtmfEvent out_event;
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// Expect to get the long event.
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EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
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EXPECT_TRUE(EqualEvents(long_event, out_event));
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// Expect no more events.
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#ifdef LEGACY_BITEXACT
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EXPECT_TRUE(buffer.GetEvent(timestamp + long_event.duration + 10,
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&out_event));
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EXPECT_TRUE(EqualEvents(long_event, out_event));
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EXPECT_TRUE(buffer.GetEvent(timestamp + long_event.duration + 10,
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&out_event));
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EXPECT_TRUE(EqualEvents(short_event, out_event));
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#else
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EXPECT_FALSE(buffer.GetEvent(timestamp + long_event.duration + 10,
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&out_event));
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#endif
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EXPECT_TRUE(buffer.Empty());
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}
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TEST(DtmfBuffer, ExtrapolationTime) {
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int event_no = 0;
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bool end_bit = false;
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int volume = 1;
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int duration = 80;
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uint32_t timestamp = 0x12345678;
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DtmfEvent event1(timestamp, event_no, volume, duration, end_bit);
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DtmfBuffer buffer(sample_rate_hz);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event1));
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EXPECT_EQ(1u, buffer.Length());
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DtmfEvent out_event;
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// Get the event at the start.
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EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
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EXPECT_TRUE(EqualEvents(event1, out_event));
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// Also get the event 100 samples after the end of the event (since we're
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// missing the end bit).
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uint32_t timestamp_now = timestamp + duration + 100;
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EXPECT_TRUE(buffer.GetEvent(timestamp_now, &out_event));
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EXPECT_TRUE(EqualEvents(event1, out_event));
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// Insert another event starting back-to-back with the previous event.
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timestamp += duration;
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event_no = 1;
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DtmfEvent event2(timestamp, event_no, volume, duration, end_bit);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event2));
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EXPECT_EQ(2u, buffer.Length());
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// Now we expect to get the new event when supplying |timestamp_now|.
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EXPECT_TRUE(buffer.GetEvent(timestamp_now, &out_event));
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EXPECT_TRUE(EqualEvents(event2, out_event));
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// Expect the the first event to be erased now.
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EXPECT_EQ(1u, buffer.Length());
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// Move |timestamp_now| to more than 560 samples after the end of the second
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// event. Expect that event to be erased.
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timestamp_now = timestamp + duration + 600;
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#ifdef LEGACY_BITEXACT
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EXPECT_TRUE(buffer.GetEvent(timestamp_now, &out_event));
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#endif
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EXPECT_FALSE(buffer.GetEvent(timestamp_now, &out_event));
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EXPECT_TRUE(buffer.Empty());
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}
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TEST(DtmfBuffer, TimestampWraparound) {
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int event_no = 0;
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bool end_bit = true;
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int volume = 1;
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int duration = 80;
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uint32_t timestamp1 = 0xFFFFFFFF - duration;
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DtmfEvent event1(timestamp1, event_no, volume, duration, end_bit);
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uint32_t timestamp2 = 0;
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DtmfEvent event2(timestamp2, event_no, volume, duration, end_bit);
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DtmfBuffer buffer(sample_rate_hz);
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event1));
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event2));
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EXPECT_EQ(2u, buffer.Length());
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DtmfEvent out_event;
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EXPECT_TRUE(buffer.GetEvent(timestamp1, &out_event));
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EXPECT_TRUE(EqualEvents(event1, out_event));
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#ifdef LEGACY_BITEXACT
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EXPECT_EQ(1u, buffer.Length());
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#else
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EXPECT_EQ(2u, buffer.Length());
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#endif
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buffer.Flush();
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// Reverse the insert order. Expect same results.
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event2));
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event1));
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EXPECT_EQ(2u, buffer.Length());
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EXPECT_TRUE(buffer.GetEvent(timestamp1, &out_event));
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EXPECT_TRUE(EqualEvents(event1, out_event));
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#ifdef LEGACY_BITEXACT
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EXPECT_EQ(1u, buffer.Length());
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#else
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EXPECT_EQ(2u, buffer.Length());
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#endif
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}
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TEST(DtmfBuffer, InvalidEvents) {
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int event_no = 0;
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bool end_bit = true;
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int volume = 1;
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int duration = 80;
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uint32_t timestamp = 0x12345678;
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DtmfEvent event(timestamp, event_no, volume, duration, end_bit);
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DtmfBuffer buffer(sample_rate_hz);
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// Invalid event number.
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event.event_no = -1;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.event_no = 16;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.event_no = 0; // Valid value;
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// Invalid volume.
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event.volume = -1;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.volume = 37;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.volume = 0; // Valid value;
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// Invalid duration.
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event.duration = -1;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.duration = 0;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.duration = 0xFFFF + 1;
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EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
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event.duration = 1; // Valid value;
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// Finish with a valid event, just to verify that all is ok.
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EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
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}
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} // namespace webrtc
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