XCEngine/MVS/Music fluctuations/source/scene/MainScene/MainScene.cpp

#include"MainScene.h"
#include"../../global/Base.h"
#include <limits>

void MainScene::OnEnter()
{
	std::cout << "enter——mainScene" << std::endl;
	m_sunshine = "res/sound/cat.wav";
	m_context->m_wavFileReader.OpenFile(m_sunshine);
	std::cout << m_context->m_wavFileReader.GetSampleRate() << std::endl;
	std::cout << m_context->m_wavFileReader.GetLastingTime() << std::endl;
	std::cout << m_context->m_wavFileReader.GetSampleNum() << std::endl;
	std::cout << m_context->m_wavFileReader.GetDataLength() << std::endl;
	std::cout << m_context->m_wavFileReader.GetBitsPerSample() << std::endl;
	std::cout << m_context->m_wavFileReader.GetBytesPerSec() << std::endl;
	std::cout << m_context->m_wavFileReader.GetChannels() << std::endl;

	int samplenum = (int)m_context->m_wavFileReader.GetSampleNum() / 2 / rate;


	//滤波器初始化，长度为8192
	filter = new FFTFilter(8192);
	/*
44100
108.668
9584548（两个声道一共）
19169096
16
176400
2
	*/
	
}

void MainScene::OnExit()
{
	std::cout << "exit——mainScene" << std::endl;
}


int drawCount = 8192;
int sampleIndex = -drawCount / 2;
float time2 = 0;
float duanIndex = 0;
bool p = true;
void MainScene::Update(float p_deltaTime)
{
	if (p) { p = false;	audio_source = m_context->m_audioManager.Load("res/sound/cat.wav");
	audio_source->Play();
	audio_source->StartEnergyDetect();
	return; 
	}
	time2 += p_deltaTime;
	sampleIndex += p_deltaTime * m_context->m_wavFileReader.GetSampleRate();
	

	duanIndex += p_deltaTime * m_context->m_wavFileReader.GetSampleRate() / (float)1024 ;
	//std::cout << duanIndex <<"   " << rates[(int)duanIndex] << "    "<<d[(int)duanIndex] << std::endl;
	m_context->m_gpu.drawVerticalLine(30, 5, 10, RGBA(255, 0, 0, 255));
	m_context->m_gpu.drawVerticalLine(60, 5, 10, RGBA(255, 0, 0, 255));
	m_context->m_gpu.drawVerticalLine(90, 5, 10, RGBA(255, 0, 0, 255));
	m_context->m_gpu.drawVerticalLine(120, 5, 10, RGBA(255, 0, 0, 255));
	m_context->m_gpu.drawVerticalLine(150, 5, 10, RGBA(255, 0, 0, 255));
	//for (int i = 0; i < 30* rates[(int)duanIndex]; i++)
	//{
	//	m_context->m_gpu.drawVerticalLine(i, 0, 5, RGBA(0, 255, 0, 255));
	//}
	for (int i = 0; i < 30 * audio_source->GetEnergy(); i++)
	{
		m_context->m_gpu.drawVerticalLine(i, 0, 5, RGBA(0, 255, 0, 255));
	}

	
	/*时域转频域*/
	std::vector<float> samples;
	std::vector<float> fresamples(8192, 0.f);
	for (int i = 0; i < drawCount; i++)
	{
		float sample = m_context->m_wavFileReader.GetSampleValue((i + sampleIndex) * 2);
		samples.push_back(sample);
	}

	filter->ForwardTransform(samples, &fresamples);
	

	int r = sin(time2) * 255;
	for (int i = 0; i < drawCount; i++)
	{
		int x = i / (float)drawCount * 800;
		//int y = m_context->m_wavFileReader.GetSampleValue((i + sampleIndex) * 2) / (float)65535 * 600 + 300;
		int y = fresamples[i] / (float)655350 * 200 + 300;
		if (x > 800)
		{
			m_context->m_gpu.drawPoint(x, y, RGBA(255, 255, 255, 255));
		}
		else
		{
			if (y > 300)
			{
				m_context->m_gpu.drawVerticalLine(x, 300, y, RGBA(r, x / (float)800 * 255, y / (float)600 * 255, 255));
			}
			else
			{
				m_context->m_gpu.drawVerticalLine(x, y, 300, RGBA(r, x / (float)800 * 255, y / (float)600 * 255, 255));
			}
		}
	}
	m_context->m_gpu.drawVerticalLine(400, 0, 600, RGBA(200, 0, 0, 255));


	if (audio_source->GetEnergy() > 2.0f)
	{
		for (int i = 0; i < 40; i++)
		{
			for (int j = 0; j < 40; j++)
			{
				if (pow(i - 20, 2) + pow(j - 20, 2) < 400)
				{
					m_context->m_gpu.drawPoint(380 + i, 480 + j, RGBA(0, 255, 255, 255));
				}
			}
		}
	}
}




/*简单的波形图绘制*/
/*

int drawCount = 80000;
int sampleIndex = -drawCount/2;
void MainScene::Update(float p_deltaTime)
{
	sampleIndex += p_deltaTime * m_context->m_wavFileReader.GetSampleRate();
	for (int i = 0; i < drawCount; i++)
	{
		int x = i / (float)drawCount * 800;
		int y = m_context->m_wavFileReader.GetSampleValue((i + sampleIndex)*2) / (float)65535 * 600 + 300;
		if (x > 400)
		{
			m_context->m_gpu.drawPoint(x, y, RGBA(255, 255, 255, 255));
		}
		else
		{
			if (y > 300)
			{
				m_context->m_gpu.drawVerticalLine(x, 300,y, RGBA(120, 120, 120, 255));
			}
			else
			{
				m_context->m_gpu.drawVerticalLine(x, y, 300,RGBA(120, 120, 120, 255));
			}
		}
	}
	m_context->m_gpu.drawVerticalLine(400,0, 600, RGBA(200, 0, 0, 255));
}

*/