Hi Connor!
Thanks for getting back to me again. I’ve begun the process for registering a new project and am currently awaiting approval. I’ve also made a stripped down version of the project so will send it your way once I’ve been cleared.
I tried the mixerSuspend followed by the flush command step. The program goes through the OnApplicationPause step without issue, but breaks a frame later (just before the oculus device goes idle). If I add the recordingStop step anywhere during this ProcessDeviceState step things break as soon as that method is hit - if i don’t call it, things break a frame later. A frame later I get the null pointer dereference error;
2024/04/24 15:12:08.912 27277 27297 Error CRASH pid: 27277, tid: 27297, name: UnityMain >>> com.ME.singing <<<
2024/04/24 15:12:08.912 27277 27297 Error CRASH uid: 10116
2024/04/24 15:12:08.912 27277 27297 Error CRASH signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr --------
2024/04/24 15:12:08.912 27277 27297 Error CRASH Cause: null pointer dereference
If i call recording.stop during this on application suspend
This is the dsp playback code (ie the code that routes the players audio back out to the speakers)
void CreateSoundStartRecording()
{
MODE mode = MODE.OPENUSER | MODE.LOOP_NORMAL;
RuntimeManager.CoreSystem.createSound("test", mode, ref _soundInfo, out _micSound);
RuntimeManager.CoreSystem.recordStart(RecordingDeviceIndex, _micSound, true);
_micSound.getLength(out uint length, TIMEUNIT.PCM);
_pcmBuffer = new short[length];
// Ading dsp capture
// Assign the callback to a member variable to avoid garbage collection
// Allocate a data buffer large enough for 8 channels
uint bufferLength;
int numBuffers;
FMODUnity.RuntimeManager.CoreSystem.getDSPBufferSize(out bufferLength, out numBuffers);
mDataBuffer = new float[bufferLength * 8];
mBufferLength = bufferLength;
// Get a handle to this object to pass into the callback
mReadCallback = CaptureDSPReadCallback;
mObjHandle = GCHandle.Alloc(this);
if (mObjHandle != null)
{
// Define a basic DSP that receives a callback each mix to capture audio
FMOD.DSP_DESCRIPTION desc = new FMOD.DSP_DESCRIPTION();
desc.numinputbuffers = 1;
desc.numoutputbuffers = 1;
desc.read = mReadCallback;
desc.userdata = GCHandle.ToIntPtr(mObjHandle);
testSet = desc;
if (FMODUnity.RuntimeManager.CoreSystem.createDSP(ref desc, out mCaptureDSP) == FMOD.RESULT.OK)
{
if (_channelGroup.addDSP(0, mCaptureDSP) != FMOD.RESULT.OK)
{
Debug.LogWarningFormat("FMOD: Unable to add mCaptureDSP to the master channel group");
}
}
else
{
Debug.LogWarningFormat("FMOD: Unable to create a DSP: mCaptureDSP");
}
}
else
{
Debug.LogWarningFormat("FMOD: Unable to create a GCHandle: mObjHandle");
}
processInputSequence = StartCoroutine(ProcessInput());
}
Which becomes tied (and performs a callback to this one…)
[AOT.MonoPInvokeCallback(typeof(FMOD.DSP_READ_CALLBACK))]
static FMOD.RESULT CaptureDSPReadCallback(ref FMOD.DSP_STATE dsp_state, IntPtr inbuffer, IntPtr outbuffer, uint length, int inchannels, ref int outchannels)
{
FMOD.DSP_STATE_FUNCTIONS functions = (FMOD.DSP_STATE_FUNCTIONS)Marshal.PtrToStructure(dsp_state.functions, typeof(FMOD.DSP_STATE_FUNCTIONS));
IntPtr userData;
functions.getuserdata(ref dsp_state, out userData);
GCHandle objHandle = GCHandle.FromIntPtr(userData);
RecordMic obj = objHandle.Target as RecordMic;
// Save the channel count out for the update function
obj.mChannels = inchannels;
// Copy the incoming buffer to process later
int lengthElements = (int)length * inchannels;
Marshal.Copy(inbuffer, obj.mDataBuffer, 0, lengthElements);
// Copy the inbuffer to the outbuffer so we can still hear it
Marshal.Copy(obj.mDataBuffer, 0, outbuffer, lengthElements);
return FMOD.RESULT.OK;
}
So i’m not sure. It feels like theres a callback that during my shutdown sequence ends up trying to do something that’s already been packed up ie. FMOD has already begun shutting down processes just a moment before my OnApplicationPause gets hit - so calling StopRecording immediately gets you into a bad place (because the recording stuff has been packed away).
But I could be off in my analysis. If i remove some of these steps, the dsp, the playback or the recording, it can handle the OnApplicationPause step without breaking - it’s the combination that seems to get things upset.
Just to outline it all really clearly - this is the whole class. The process device state method has gone through a billion iterations of what it does - so it may look slightly different to the above code.
using System;
using System.Runtime.InteropServices;
using FMOD;
using UnityEngine.Serialization;
namespace Audio
{
using FMODUnity;
using UnityEngine;
using System.Collections;
using FMOD.Studio;
using Sirenix.OdinInspector;
public class RecordMic : MonoBehaviour
{
//public variables
[Header("Choose A Microphone")]
public int RecordingDeviceIndex = 0;
[TextArea]
public string RecordingDeviceName = null;
public float Latency = .05f;
//FMOD Objects
private Sound _micSound;
private CREATESOUNDEXINFO _soundInfo;
private Channel _channel;
private ChannelGroup _channelGroup;
private int numOfDriversConnected = 0;
private int numofDrivers = 0;
private Guid MicGUID;
private int SampleRate = 0;
private SPEAKERMODE FMODSpeakerMode;
private int NumOfChannels = 0;
public const int NumBytesPerSample = 2;
public const int NumInputChannels = 1;
private DRIVER_STATE driverState;
const float WIDTH = 0.01f;
const float HEIGHT = 10.0f;
const float YOFFSET = 5.0f;
public static float micVolume;
protected short[] _pcmBuffer;
protected int _bufferPos;
private int _latencySamples;
private DSP _reverbDSP;
[FormerlySerializedAs("_micSfxEvent")]
[Header("Input Monitoring")]
[SerializeField]
[Tooltip("Path to the event for input monitoring")]
EventReference micSfxEvent;
Coroutine processInputSequence = null;
EventInstance micInstance;
private bool isRecordingActive = false;
private bool isApplicationPaused;
private bool isApplicationFocused;
void Start()
{
Initialize();
CreateSoundStartRecording();
}
void Initialize()
{
RuntimeManager.CoreSystem.createChannelGroup("Microphone ChannelGroup", out _channelGroup);
LogMicrophoneAvailability();
ConfigureSoundSettings();
ConfigureReverb();
}
void LogMicrophoneAvailability()
{
RuntimeManager.CoreSystem.getRecordNumDrivers(out numofDrivers, out numOfDriversConnected);
Debug.Log(numOfDriversConnected == 0 ? "Plug in a Microphone!!!" : $"You have {numOfDriversConnected} microphones available to record with.");
}
void ConfigureSoundSettings()
{
RuntimeManager.CoreSystem.getRecordDriverInfo(RecordingDeviceIndex, out RecordingDeviceName, 50, out MicGUID, out SampleRate, out FMODSpeakerMode, out NumOfChannels, out driverState);
_soundInfo = new CREATESOUNDEXINFO
{
cbsize = Marshal.SizeOf(typeof(CREATESOUNDEXINFO)),
length = (uint)(SampleRate * sizeof(byte) * NumBytesPerSample * NumInputChannels),
numchannels = NumInputChannels,
channelorder = CHANNELORDER.ALLMONO,
defaultfrequency = SampleRate,
format = SOUND_FORMAT.PCM16,
dlsname = IntPtr.Zero,
};
_latencySamples = (int)(SampleRate * Latency);
}
void ConfigureReverb()
{
REVERB_PROPERTIES reverbRoom = PRESET.ROOM();
REVERB_PROPERTIES reverbOff = PRESET.OFF();
REVERB_PROPERTIES reverbArena = PRESET.ARENA();
// RuntimeManager.CoreSystem.setReverbProperties(1, ref reverbArena);
RuntimeManager.CoreSystem.createDSPByType(DSP_TYPE.SFXREVERB, out _reverbDSP);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.DECAYTIME, 2.0f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.EARLYDELAY, 0.1f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.LATEDELAY, 0.01f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.HFREFERENCE, 5000f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.HFDECAYRATIO, 50f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.DIFFUSION, 70f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.DENSITY, 70f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.LOWSHELFFREQUENCY, 200f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.LOWSHELFGAIN, 0f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.HIGHCUT, 10000f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.EARLYLATEMIX, 50f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.WETLEVEL, -6f);
_reverbDSP.setParameterFloat((int)FMOD.DSP_SFXREVERB.DRYLEVEL, 0f);
_channelGroup.addDSP(0, _reverbDSP);
}
FMOD.DSP_DESCRIPTION testSet;
void CreateSoundStartRecording()
{
MODE mode = MODE.OPENUSER | MODE.LOOP_NORMAL;
RuntimeManager.CoreSystem.createSound("test", mode, ref _soundInfo, out _micSound);
RuntimeManager.CoreSystem.recordStart(RecordingDeviceIndex, _micSound, true);
_micSound.getLength(out uint length, TIMEUNIT.PCM);
_pcmBuffer = new short[length];
// Ading dsp capture
// Assign the callback to a member variable to avoid garbage collection
// Allocate a data buffer large enough for 8 channels
uint bufferLength;
int numBuffers;
FMODUnity.RuntimeManager.CoreSystem.getDSPBufferSize(out bufferLength, out numBuffers);
mDataBuffer = new float[bufferLength * 8];
mBufferLength = bufferLength;
// Get a handle to this object to pass into the callback
mReadCallback = CaptureDSPReadCallback;
mObjHandle = GCHandle.Alloc(this);
if (mObjHandle != null)
{
// Define a basic DSP that receives a callback each mix to capture audio
FMOD.DSP_DESCRIPTION desc = new FMOD.DSP_DESCRIPTION();
desc.numinputbuffers = 1;
desc.numoutputbuffers = 1;
desc.read = mReadCallback;
desc.userdata = GCHandle.ToIntPtr(mObjHandle);
testSet = desc;
if (FMODUnity.RuntimeManager.CoreSystem.createDSP(ref desc, out mCaptureDSP) == FMOD.RESULT.OK)
{
if (_channelGroup.addDSP(0, mCaptureDSP) != FMOD.RESULT.OK)
{
Debug.LogWarningFormat("FMOD: Unable to add mCaptureDSP to the master channel group");
}
}
else
{
Debug.LogWarningFormat("FMOD: Unable to create a DSP: mCaptureDSP");
}
}
else
{
Debug.LogWarningFormat("FMOD: Unable to create a GCHandle: mObjHandle");
}
processInputSequence = StartCoroutine(ProcessInput());
}
void OnApplicationPause(bool pauseStatus)
{
#if !UNITY_EDITOR
isApplicationPaused = pauseStatus;
ProcessDeviceState();
#endif
}
void OnApplicationFocus(bool hasFocus)
{
#if !UNITY_EDITOR
isApplicationFocused = hasFocus;
ProcessDeviceState();
#endif
}
void ProcessDeviceState()
{
if(isRecordingActive && !isApplicationFocused || isApplicationPaused)
{
Debug.Log("Pausing record");
StopCoroutine(processInputSequence);
testSet.read = null;
isRecordingActive = false;
_channel.stop();
RuntimeManager.CoreSystem.update();
RuntimeManager.CoreSystem.mixerSuspend();
RuntimeManager.StudioSystem.flushCommands();
RuntimeManager.WaitForAllSampleLoading();
RuntimeManager.CoreSystem.recordStop(RecordingDeviceIndex);
Debug.Log("All steps in pause record concluded.");
}
else if(!isRecordingActive && isApplicationFocused && !isApplicationPaused)
{
isRecordingActive = true;
Debug.Log("Resuming record");
}
}
void LateUpdate()
{
if (isRecordingActive)
{
FillPCMBuffer(out int numSamples);
UpdateDSPViz();
}
}
void UpdateDSPViz()
{
float frameVolume = 0f;
// Do what you want with the captured data
for (int j = 0; j < mBufferLength; j++)
{
for (int i = 0; i < mChannels; i++)
{
frameVolume += Mathf.Abs(mDataBuffer[(j * mChannels) + i]);
//float x = j * WIDTH;
//float y = mDataBuffer[(j * mChannels) + i] * HEIGHT;
// Make sure Gizmos is enabled in the Unity Editor to show debug line draw for the captured channel data
//Debug.DrawLine(new Vector3(x, (YOFFSET * i) + y, 0), new Vector3(x, (YOFFSET * i) - y, 0), Color.green);
}
}
micVolume = frameVolume / mDataBuffer.Length * HEIGHT;
}
IEnumerator ProcessInput()
{
isRecordingActive = true;
micInstance = FMODUnity.RuntimeManager.CreateInstance(micSfxEvent);
var createResult = micInstance.start();
if (createResult != RESULT.OK) {
Debug.LogError("[Fmod] Had an issue instantiating the input monitoring event.");
}
FMOD.Studio.PLAYBACK_STATE playbackState;
var attemptCount = 0;
do {
attemptCount++;
if (attemptCount > 50) {
Debug.LogError("AUDIO IO MANAGER: reached attempt limit preparing input monitoring event instance");
yield break;
}
createResult = micInstance.getPlaybackState(out playbackState);
if (createResult != RESULT.OK) {
Debug.Log("Too MANY TRIES!!!");
yield break;
}
yield return new WaitForEndOfFrame();
} while (playbackState != FMOD.Studio.PLAYBACK_STATE.PLAYING);
var result = micInstance.getPlaybackState(out playbackState);
RuntimeManager.CoreSystem.playSound(_micSound, _channelGroup, false, out _channel);
while (isRecordingActive)
{
createResult = _channel.setPosition((uint)(int)Mathf.Repeat(_bufferPos - _latencySamples, _pcmBuffer.Length), TIMEUNIT.PCM);
yield break;
}
}
protected bool FillPCMBuffer(out int numSamples)
{
numSamples = 0;
if (!isRecordingActive)
{
return false;
}
RESULT result = RuntimeManager.CoreSystem.getRecordPosition(RecordingDeviceIndex, out uint recPos);
if (result != RESULT.OK) return false;
if (recPos == _bufferPos) return true;
numSamples = (int)Mathf.Repeat((int)recPos - _bufferPos, _pcmBuffer.Length);
result = _micSound.@lock(
(uint)_bufferPos * NumBytesPerSample,
(uint)numSamples * NumBytesPerSample,
out IntPtr ptr1, out IntPtr ptr2, out uint len1, out uint len2);
if (result != RESULT.OK) return false;
Marshal.Copy(ptr1, _pcmBuffer, _bufferPos, (int)len1 / NumBytesPerSample);
if (len2 > 0) Marshal.Copy(ptr2, _pcmBuffer, 0, (int)len2 / NumBytesPerSample);
result = _micSound.unlock(ptr1, ptr2, len1, len2);
if (result != RESULT.OK) return false;
_bufferPos = (int)recPos;
return true;
}
private FMOD.DSP_READ_CALLBACK mReadCallback;
private FMOD.DSP mCaptureDSP;
private float[] mDataBuffer;
private GCHandle mObjHandle;
private uint mBufferLength;
private int mChannels = 0;
[AOT.MonoPInvokeCallback(typeof(FMOD.DSP_READ_CALLBACK))]
static FMOD.RESULT CaptureDSPReadCallback(ref FMOD.DSP_STATE dsp_state, IntPtr inbuffer, IntPtr outbuffer, uint length, int inchannels, ref int outchannels)
{
FMOD.DSP_STATE_FUNCTIONS functions = (FMOD.DSP_STATE_FUNCTIONS)Marshal.PtrToStructure(dsp_state.functions, typeof(FMOD.DSP_STATE_FUNCTIONS));
IntPtr userData;
functions.getuserdata(ref dsp_state, out userData);
GCHandle objHandle = GCHandle.FromIntPtr(userData);
RecordMic obj = objHandle.Target as RecordMic;
// Save the channel count out for the update function
obj.mChannels = inchannels;
// Copy the incoming buffer to process later
int lengthElements = (int)length * inchannels;
Marshal.Copy(inbuffer, obj.mDataBuffer, 0, lengthElements);
// Copy the inbuffer to the outbuffer so we can still hear it
Marshal.Copy(obj.mDataBuffer, 0, outbuffer, lengthElements);
return FMOD.RESULT.OK;
}
}
}
Appreciate your time in looking at this. If theres anything else specific that I can provide please let me know.
