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/*
* Copyright (c) 2012 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 "modules/audio_coding/neteq/dtmf_buffer.h"
#ifdef WIN32
#include <winsock2.h> // ntohl()
#else
#include <arpa/inet.h> // ntohl()
#endif
#include <iostream>
#include "test/gtest.h"
// Modify the tests so that they pass with the modifications done to DtmfBuffer
// for backwards bit-exactness. Once bit-exactness is no longer required, this
// #define should be removed (and the code that it enables).
#define LEGACY_BITEXACT
namespace webrtc {
static int sample_rate_hz = 8000;
static uint32_t MakeDtmfPayload(int event, bool end, int volume, int duration) {
uint32_t payload = 0;
// 0 1 2 3
// 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
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | event |E|R| volume | duration |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
payload |= (event & 0x00FF) << 24;
payload |= (end ? 0x00800000 : 0x00000000);
payload |= (volume & 0x003F) << 16;
payload |= (duration & 0xFFFF);
payload = ntohl(payload);
return payload;
}
static bool EqualEvents(const DtmfEvent& a, const DtmfEvent& b) {
return (a.duration == b.duration && a.end_bit == b.end_bit &&
a.event_no == b.event_no && a.timestamp == b.timestamp &&
a.volume == b.volume);
}
TEST(DtmfBuffer, CreateAndDestroy) {
DtmfBuffer* buffer = new DtmfBuffer(sample_rate_hz);
delete buffer;
}
// Test the event parser.
TEST(DtmfBuffer, ParseEvent) {
int event_no = 7;
bool end_bit = true;
int volume = 17;
int duration = 4711;
uint32_t timestamp = 0x12345678;
uint32_t payload = MakeDtmfPayload(event_no, end_bit, volume, duration);
uint8_t* payload_ptr = reinterpret_cast<uint8_t*>(&payload);
DtmfEvent event;
EXPECT_EQ(DtmfBuffer::kOK, DtmfBuffer::ParseEvent(timestamp, payload_ptr,
sizeof(payload), &event));
EXPECT_EQ(duration, event.duration);
EXPECT_EQ(end_bit, event.end_bit);
EXPECT_EQ(event_no, event.event_no);
EXPECT_EQ(timestamp, event.timestamp);
EXPECT_EQ(volume, event.volume);
EXPECT_EQ(DtmfBuffer::kPayloadTooShort,
DtmfBuffer::ParseEvent(timestamp, payload_ptr, 3, &event));
}
TEST(DtmfBuffer, SimpleInsertAndGet) {
int event_no = 7;
bool end_bit = true;
int volume = 17;
int duration = 4711;
uint32_t timestamp = 0x12345678;
DtmfEvent event(timestamp, event_no, volume, duration, end_bit);
DtmfBuffer buffer(sample_rate_hz);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
EXPECT_EQ(1u, buffer.Length());
EXPECT_FALSE(buffer.Empty());
DtmfEvent out_event;
// Too early to get event.
EXPECT_FALSE(buffer.GetEvent(timestamp - 10, &out_event));
EXPECT_EQ(1u, buffer.Length());
EXPECT_FALSE(buffer.Empty());
// Get the event at its starting timestamp.
EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
EXPECT_TRUE(EqualEvents(event, out_event));
EXPECT_EQ(1u, buffer.Length());
EXPECT_FALSE(buffer.Empty());
// Get the event some time into the event.
EXPECT_TRUE(buffer.GetEvent(timestamp + duration / 2, &out_event));
EXPECT_TRUE(EqualEvents(event, out_event));
EXPECT_EQ(1u, buffer.Length());
EXPECT_FALSE(buffer.Empty());
// Give a "current" timestamp after the event has ended.
#ifdef LEGACY_BITEXACT
EXPECT_TRUE(buffer.GetEvent(timestamp + duration + 10, &out_event));
#endif
EXPECT_FALSE(buffer.GetEvent(timestamp + duration + 10, &out_event));
EXPECT_EQ(0u, buffer.Length());
EXPECT_TRUE(buffer.Empty());
}
TEST(DtmfBuffer, MergingPackets) {
int event_no = 0;
bool end_bit = false;
int volume = 17;
int duration = 80;
uint32_t timestamp = 0x12345678;
DtmfEvent event(timestamp, event_no, volume, duration, end_bit);
DtmfBuffer buffer(sample_rate_hz);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
event.duration += 80;
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
event.duration += 80;
event.end_bit = true;
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
EXPECT_EQ(1u, buffer.Length());
DtmfEvent out_event;
EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
EXPECT_TRUE(EqualEvents(event, out_event));
}
// This test case inserts one shorter event completely overlapped by one longer
// event. The expected outcome is that only the longer event is played.
TEST(DtmfBuffer, OverlappingEvents) {
int event_no = 0;
bool end_bit = true;
int volume = 1;
int duration = 80;
uint32_t timestamp = 0x12345678 + 80;
DtmfEvent short_event(timestamp, event_no, volume, duration, end_bit);
DtmfBuffer buffer(sample_rate_hz);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(short_event));
event_no = 10;
end_bit = false;
timestamp = 0x12345678;
DtmfEvent long_event(timestamp, event_no, volume, duration, end_bit);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(long_event));
long_event.duration += 80;
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(long_event));
long_event.duration += 80;
long_event.end_bit = true;
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(long_event));
EXPECT_EQ(2u, buffer.Length());
DtmfEvent out_event;
// Expect to get the long event.
EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
EXPECT_TRUE(EqualEvents(long_event, out_event));
// Expect no more events.
#ifdef LEGACY_BITEXACT
EXPECT_TRUE(
buffer.GetEvent(timestamp + long_event.duration + 10, &out_event));
EXPECT_TRUE(EqualEvents(long_event, out_event));
EXPECT_TRUE(
buffer.GetEvent(timestamp + long_event.duration + 10, &out_event));
EXPECT_TRUE(EqualEvents(short_event, out_event));
#else
EXPECT_FALSE(
buffer.GetEvent(timestamp + long_event.duration + 10, &out_event));
#endif
EXPECT_TRUE(buffer.Empty());
}
TEST(DtmfBuffer, ExtrapolationTime) {
int event_no = 0;
bool end_bit = false;
int volume = 1;
int duration = 80;
uint32_t timestamp = 0x12345678;
DtmfEvent event1(timestamp, event_no, volume, duration, end_bit);
DtmfBuffer buffer(sample_rate_hz);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event1));
EXPECT_EQ(1u, buffer.Length());
DtmfEvent out_event;
// Get the event at the start.
EXPECT_TRUE(buffer.GetEvent(timestamp, &out_event));
EXPECT_TRUE(EqualEvents(event1, out_event));
// Also get the event 100 samples after the end of the event (since we're
// missing the end bit).
uint32_t timestamp_now = timestamp + duration + 100;
EXPECT_TRUE(buffer.GetEvent(timestamp_now, &out_event));
EXPECT_TRUE(EqualEvents(event1, out_event));
// Insert another event starting back-to-back with the previous event.
timestamp += duration;
event_no = 1;
DtmfEvent event2(timestamp, event_no, volume, duration, end_bit);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event2));
EXPECT_EQ(2u, buffer.Length());
// Now we expect to get the new event when supplying `timestamp_now`.
EXPECT_TRUE(buffer.GetEvent(timestamp_now, &out_event));
EXPECT_TRUE(EqualEvents(event2, out_event));
// Expect the the first event to be erased now.
EXPECT_EQ(1u, buffer.Length());
// Move `timestamp_now` to more than 560 samples after the end of the second
// event. Expect that event to be erased.
timestamp_now = timestamp + duration + 600;
#ifdef LEGACY_BITEXACT
EXPECT_TRUE(buffer.GetEvent(timestamp_now, &out_event));
#endif
EXPECT_FALSE(buffer.GetEvent(timestamp_now, &out_event));
EXPECT_TRUE(buffer.Empty());
}
TEST(DtmfBuffer, TimestampWraparound) {
int event_no = 0;
bool end_bit = true;
int volume = 1;
int duration = 80;
uint32_t timestamp1 = 0xFFFFFFFF - duration;
DtmfEvent event1(timestamp1, event_no, volume, duration, end_bit);
uint32_t timestamp2 = 0;
DtmfEvent event2(timestamp2, event_no, volume, duration, end_bit);
DtmfBuffer buffer(sample_rate_hz);
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event1));
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event2));
EXPECT_EQ(2u, buffer.Length());
DtmfEvent out_event;
EXPECT_TRUE(buffer.GetEvent(timestamp1, &out_event));
EXPECT_TRUE(EqualEvents(event1, out_event));
#ifdef LEGACY_BITEXACT
EXPECT_EQ(1u, buffer.Length());
#else
EXPECT_EQ(2u, buffer.Length());
#endif
buffer.Flush();
// Reverse the insert order. Expect same results.
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event2));
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event1));
EXPECT_EQ(2u, buffer.Length());
EXPECT_TRUE(buffer.GetEvent(timestamp1, &out_event));
EXPECT_TRUE(EqualEvents(event1, out_event));
#ifdef LEGACY_BITEXACT
EXPECT_EQ(1u, buffer.Length());
#else
EXPECT_EQ(2u, buffer.Length());
#endif
}
TEST(DtmfBuffer, InvalidEvents) {
int event_no = 0;
bool end_bit = true;
int volume = 1;
int duration = 80;
uint32_t timestamp = 0x12345678;
DtmfEvent event(timestamp, event_no, volume, duration, end_bit);
DtmfBuffer buffer(sample_rate_hz);
// Invalid event number.
event.event_no = -1;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.event_no = 16;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.event_no = 0; // Valid value;
// Invalid volume.
event.volume = -1;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.volume = 64;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.volume = 0; // Valid value;
// Invalid duration.
event.duration = -1;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.duration = 0;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.duration = 0xFFFF + 1;
EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
event.duration = 1; // Valid value;
// Finish with a valid event, just to verify that all is ok.
EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
}
} // namespace webrtc