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// Copyright (c) 2012 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/bind.h"
#include "base/bind_helpers.h"
#include "base/macros.h"
#include "base/strings/stringprintf.h"
#include "media/base/audio_bus.h"
#include "media/base/audio_pull_fifo.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
// Block diagram of a possible real-world usage:
//
// | Producer | ----> | AudioPullFifo | ----> | Consumer |
// push pull
// 2048 ----> (2048) ----> ~512
// Number of channels in each audio bus.
static int kChannels = 2;
// Max number of audio framed the FIFO can contain.
static const int kMaxFramesInFifo = 2048;
class AudioPullFifoTest
: public testing::TestWithParam<int> {
public:
AudioPullFifoTest()
: pull_fifo_(kChannels,
kMaxFramesInFifo,
base::Bind(&AudioPullFifoTest::ProvideInput,
base::Unretained(this))),
audio_bus_(AudioBus::Create(kChannels, kMaxFramesInFifo)),
fill_value_(0),
last_frame_delay_(-1) {
EXPECT_EQ(kMaxFramesInFifo, pull_fifo_.SizeInFrames());
}
virtual ~AudioPullFifoTest() {}
void VerifyValue(const float data[], int size, float start_value) {
float value = start_value;
for (int i = 0; i < size; ++i) {
ASSERT_FLOAT_EQ(value++, data[i]) << "i=" << i;
}
}
// Consume data using different sizes, acquire audio frames from the FIFO
// and verify that the retrieved values matches the values written by the
// producer.
void ConsumeTest(int frames_to_consume) {
int start_value = 0;
SCOPED_TRACE(base::StringPrintf("Checking frames_to_consume %d",
frames_to_consume));
pull_fifo_.Consume(audio_bus_.get(), frames_to_consume);
for (int j = 0; j < kChannels; ++j) {
VerifyValue(audio_bus_->channel(j), frames_to_consume, start_value);
}
start_value += frames_to_consume;
EXPECT_LT(last_frame_delay_, audio_bus_->frames());
}
// AudioPullFifo::ReadCB implementation where we increase a value for each
// audio frame that we provide. Note that all channels are given the same
// value to simplify the verification.
virtual void ProvideInput(int frame_delay, AudioBus* audio_bus) {
ASSERT_GT(frame_delay, last_frame_delay_);
last_frame_delay_ = frame_delay;
EXPECT_EQ(audio_bus->channels(), audio_bus_->channels());
EXPECT_EQ(audio_bus->frames(), kMaxFramesInFifo);
for (int i = 0; i < audio_bus->frames(); ++i) {
for (int j = 0; j < audio_bus->channels(); ++j) {
// Store same value in all channels.
audio_bus->channel(j)[i] = fill_value_;
}
fill_value_++;
}
}
protected:
AudioPullFifo pull_fifo_;
scoped_ptr<AudioBus> audio_bus_;
int fill_value_;
int last_frame_delay_;
DISALLOW_COPY_AND_ASSIGN(AudioPullFifoTest);
};
TEST_P(AudioPullFifoTest, Consume) {
ConsumeTest(GetParam());
}
// Test common |frames_to_consume| values which will be used as input
// parameter to AudioPullFifo::Consume() when the consumer asks for data.
INSTANTIATE_TEST_CASE_P(
AudioPullFifoTest, AudioPullFifoTest,
testing::Values(544, 512, 512, 512, 512, 2048, 544, 441, 440, 433, 500));
} // namespace media
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