Messages

1

Audio / Operating with sample rate

« on: January 05, 2017, 06:04:12 pm »

I am taking half second samples of audio.
I would like to collect a large amount of audio data in that time
What timing is setSampleRate() in?
What sample rate would you suggest?

2

Audio / Re: Music from buffer

« on: January 03, 2017, 03:46:37 pm »

I do have "openal32.dll" in my working directory.
I am trying to process a constant audio stream from a microphone and get the pitch using music.
Is there a way to load the array of audio samples into music to detect the pitch?

3

Audio / Music from buffer

« on: December 21, 2016, 05:27:24 pm »

// SFML 1.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <SFML\Audio.hpp>
#include <Windows.h>
#include <thread>
#include <iostream>
#include "MethodHeaders.h"
#include <string>
#include <string.h>

int main(int nNumberOfArgs, char *pszArgs[]) {
        //check if audio capture is available
        if (!sf::SoundBufferRecorder::isAvailable())
        {
                std::cout << "error: audio capture is not available on this system" << std::endl;
                std::cin.get();
        }
        else
        {
                // create the recorder
                HandleSamples sampler;
                std::vector<std::string> devices = sampler.getAvailableDevices();
                std::cout << !devices.empty() << std::endl;
                if (!(devices.empty())) {
                        HandleSamples sampler;
                        sampler.setDevice(devices.at(0));
                        sampler.start();
                        std::cout << "sampler has started" << std::endl;
                        Sleep(1000000);
                        sampler.stop();
                }
                else
                        // handle if no microphone can be detected
                {
                        std::cout << "error: There is no audio input device detected on this system" << std::endl;
                        std::cin.get();
                }
               
               
        }
}
void handlePitch(float pitch) {
        std::cout << pitch << std::endl;
}

 

//sampler.cpp
#include "stdafx.h"
#include <SFML\Audio.hpp>
#include <thread>
#include <iostream>
#include "MethodHeaders.h"
bool HandleSamples::onProcessSamples(const sf::Int16* samples, std::size_t sampleCount) {
        sf::Music music;
        music.openFromMemory(samples, sampleCount);
        float pitch = music.getPitch();
        music.play();
        handlePitch(pitch);

        return true;
}

This is the error I get.

Failed to open sound file from memory (format not supported)
Failed to play audio stream: sound parameters have not been initialized (call initialize() first)
 

How would I fix this?

4

Audio / Re: I am new to SFML how do i save buffers

« on: December 20, 2016, 05:36:47 pm »

I do not know what bit-rate it records at is there a  way to find that, or even better to set it.
When I call getSampleRate() and getChannelCount() on the buffer they both return 0 which seems wrong.

How would I use relative paths?

5

Audio / I am new to SFML how do i save buffers

« on: December 20, 2016, 05:10:47 pm »

This is the Difficult code:

// SFML 1.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <SFML\Audio.hpp>
#include <Windows.h>
#include <thread>
#include <iostream>
#include "MethodHeaders.h"
#include <string>
#include <string.h>

int main(int nNumberOfArgs, char *pszArgs[])
{
       
        if (sf::SoundBufferRecorder::isAvailable())
        {
                std::vector<std::string> devices = sf::SoundRecorder::getAvailableDevices();
                // Record some audio data
                sf::SoundBufferRecorder recorder;
                if (devices.empty()) {
                        std::cout << "No available devices" << std::endl;
                }
                else
                {
                        std::cout << "program has started" << std::endl;
                recorder.setDevice(devices[0]);
                while(true)
                {
                recorder.start();
               
                        recorder.stop();
                // Get the buffer containing the captured audio data
                // this makes a reference while i want a copy // const sf::SoundBuffer& buffer = r     recorder.getBuffer();
                // sample input stream by copy for frequencies 1 - 8, each in its own thread
                // output frequency matches
                //save recording to buffer
                const sf::SoundBuffer buffer = recorder.getBuffer();
                //save buffer to file
                buffer.saveToFile("C:\\Users\\smithdus005\\Documents\\sample.ogg");
                std::thread sample(sampleAudio);
                std::thread play(playAudio);
                sample.join();
                play.join();
                }
 
                }
               
        }
  }
  void playAudio() {
        sf::Music music;
        //change into music format
        music.openFromFile("C:\\Users\\smithdus005\\Documents\\sample.ogg");
        //play music
        music.play();
  }
  void sampleAudio() {
        sf::Music music;
        //change into music format
        music.openFromFile("C:\\Users\\smithdus005\\Documents\\sample.ogg");
        //check pitch
        float currentPitch = music.getPitch();
  }

I get this error:
Failed to write ogg/vorbis file "C:\Users\smithdus005\Documents\sample.ogg" (unsupported bitrate)