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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/basictypes.h"
#include "base/environment.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/threading/platform_thread.h"
#include "media/audio/audio_io.h"
#include "media/audio/audio_manager.h"
#include "testing/gtest/include/gtest/gtest.h"
static const int kSamplingRate = 8000;
static const int kSamplesPerPacket = kSamplingRate / 20;
// This class allows to find out if the callbacks are occurring as
// expected and if any error has been reported.
class TestInputCallback : public AudioInputStream::AudioInputCallback {
public:
explicit TestInputCallback(int max_data_bytes)
: callback_count_(0),
had_error_(0),
was_closed_(0),
max_data_bytes_(max_data_bytes) {
}
virtual void OnData(AudioInputStream* stream, const uint8* data,
uint32 size, uint32 hardware_delay_bytes) {
++callback_count_;
// Read the first byte to make sure memory is good.
if (size) {
ASSERT_LE(static_cast<int>(size), max_data_bytes_);
int value = data[0];
EXPECT_TRUE(value >= 0);
}
}
virtual void OnClose(AudioInputStream* stream) {
++was_closed_;
}
virtual void OnError(AudioInputStream* stream, int code) {
++had_error_;
}
// Returns how many times OnData() has been called.
int callback_count() const {
return callback_count_;
}
// Returns how many times the OnError callback was called.
int had_error() const {
return had_error_;
}
void set_error(bool error) {
had_error_ += error ? 1 : 0;
}
// Returns how many times the OnClose callback was called.
int was_closed() const {
return was_closed_;
}
private:
int callback_count_;
int had_error_;
int was_closed_;
int max_data_bytes_;
};
// Specializes TestInputCallback to simulate a sink that blocks for some time
// in the OnData callback.
class TestInputCallbackBlocking : public TestInputCallback {
public:
TestInputCallbackBlocking(int max_data_bytes, int block_after_callback,
int block_for_ms)
: TestInputCallback(max_data_bytes),
block_after_callback_(block_after_callback),
block_for_ms_(block_for_ms) {
}
virtual void OnData(AudioInputStream* stream, const uint8* data,
uint32 size, uint32 hardware_delay_bytes) {
// Call the base, which increments the callback_count_.
TestInputCallback::OnData(stream, data, size, hardware_delay_bytes);
if (callback_count() > block_after_callback_)
base::PlatformThread::Sleep(block_for_ms_);
}
private:
int block_after_callback_;
int block_for_ms_;
};
static bool CanRunAudioTests() {
scoped_ptr<base::Environment> env(base::Environment::Create());
if (env->HasVar("CHROME_HEADLESS"))
return false;
AudioManager* audio_man = AudioManager::GetAudioManager();
if (NULL == audio_man)
return false;
return audio_man->HasAudioInputDevices();
}
static AudioInputStream* CreateTestAudioInputStream() {
AudioManager* audio_man = AudioManager::GetAudioManager();
AudioInputStream* ais = audio_man->MakeAudioInputStream(
AudioParameters(AudioParameters::AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_STEREO,
kSamplingRate, 16, kSamplesPerPacket));
EXPECT_TRUE(NULL != ais);
return ais;
}
// Test that AudioInputStream rejects out of range parameters.
TEST(AudioInputTest, SanityOnMakeParams) {
if (!CanRunAudioTests())
return;
AudioManager* audio_man = AudioManager::GetAudioManager();
AudioParameters::Format fmt = AudioParameters::AUDIO_PCM_LINEAR;
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_7POINT1, 8000, 16,
kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_MONO, 1024 * 1024, 16,
kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_STEREO, 8000, 80,
kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_STEREO, 8000, 80,
1000 * kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_UNSUPPORTED, 8000, 16,
kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_STEREO, -8000, 16,
kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_STEREO, 8000, -16,
kSamplesPerPacket)));
EXPECT_TRUE(NULL == audio_man->MakeAudioInputStream(
AudioParameters(fmt, CHANNEL_LAYOUT_STEREO, 8000, 16, -1024)));
}
// Test create and close of an AudioInputStream without recording audio.
TEST(AudioInputTest, CreateAndClose) {
if (!CanRunAudioTests())
return;
AudioInputStream* ais = CreateTestAudioInputStream();
ais->Close();
}
// Test create, open and close of an AudioInputStream without recording audio.
TEST(AudioInputTest, OpenAndClose) {
if (!CanRunAudioTests())
return;
AudioInputStream* ais = CreateTestAudioInputStream();
EXPECT_TRUE(ais->Open());
ais->Close();
}
// Test create, open, stop and close of an AudioInputStream without recording.
TEST(AudioInputTest, OpenStopAndClose) {
if (!CanRunAudioTests())
return;
AudioInputStream* ais = CreateTestAudioInputStream();
EXPECT_TRUE(ais->Open());
ais->Stop();
ais->Close();
}
// Test a normal recording sequence using an AudioInputStream.
TEST(AudioInputTest, Record) {
if (!CanRunAudioTests())
return;
MessageLoop message_loop(MessageLoop::TYPE_DEFAULT);
AudioInputStream* ais = CreateTestAudioInputStream();
EXPECT_TRUE(ais->Open());
TestInputCallback test_callback(kSamplesPerPacket * 4);
ais->Start(&test_callback);
// Verify at least 500ms worth of audio was recorded, after giving sufficient
// extra time.
message_loop.PostDelayedTask(FROM_HERE, new MessageLoop::QuitTask(), 590);
message_loop.Run();
EXPECT_GE(test_callback.callback_count(), 10);
EXPECT_FALSE(test_callback.had_error());
ais->Stop();
ais->Close();
}
// Test a recording sequence with delays in the audio callback.
TEST(AudioInputTest, RecordWithSlowSink) {
if (!CanRunAudioTests())
return;
MessageLoop message_loop(MessageLoop::TYPE_DEFAULT);
AudioInputStream* ais = CreateTestAudioInputStream();
EXPECT_TRUE(ais->Open());
// We should normally get a callback every 50ms, and a 20ms delay inside each
// callback should not change this sequence.
TestInputCallbackBlocking test_callback(kSamplesPerPacket * 4, 0, 20);
ais->Start(&test_callback);
// Verify at least 500ms worth of audio was recorded, after giving sufficient
// extra time.
message_loop.PostDelayedTask(FROM_HERE, new MessageLoop::QuitTask(), 590);
message_loop.Run();
EXPECT_GE(test_callback.callback_count(), 10);
EXPECT_FALSE(test_callback.had_error());
ais->Stop();
ais->Close();
}
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