protected void UpdatePlaySpeed()
{
int?speed = this._speed;
if (!speed.HasValue)
{
return;
}
float offset = (float)Math.Abs(speed.Value) / _PLAY_SPEED_ZOOM_MULIT;
var waveInfo = this.WaveInfo;
if (waveInfo == null)
{
throw new WavException("句柄已释放");
}
var sampleRate = waveInfo.SampleRate;
float playSampleRate;
if (speed.Value < 0)
{
playSampleRate = sampleRate * (1 - offset);
}
else if (speed.Value == 0)
{
playSampleRate = sampleRate;
}
else
{
playSampleRate = sampleRate * (1 + offset);
}
WavHelper.ChannelSetSpeed(this._handle, playSampleRate);
}
/// <summary>
/// 开始录音
/// </summary>
/// <param name="freq">录音采样率,默认48000</param>
/// <param name="chans">声道数[1-6],默认1</param>
/// <param name="period">录音数据输出间隔,单位/毫秒,默认100.最小值5ms,the maximum the maximum is half the BASS_CONFIG_REC_BUFFER setting.
/// If the period specified is outside this range, it is automatically capped. The default is 100ms</param>
/// <param name="sampleType">采样类型,建议默认值16位</param>
public void Start(int freq = 48000, int chans = 1, int period = 100, SampleType sampleType = SampleType.Sample16Bit)
{
BASSFlag flags = this.SampleTypeToBASSFlag(sampleType);
this._recordFlag = true;
this._handle = RecordHelper.RecordStart(freq, chans, flags, period, this._recordPro, IntPtr.Zero);
WavHelper.ChannelPlay(this._handle, false);
}
protected override void FreeBASS()
{
this._waveInfo = null;
base.FreeBASS();
if (base.HandleValid())
{
WavHelper.BASS_ChannelRemoveSync(base._handle, this._playEndSyncHandle);
}
}
/// <summary>
/// 播放
/// </summary>
public void Play()
{
if (this.ValidatePPSOperate(SoundPlayerStatus.Playing))
{
this._status = SoundPlayerStatus.StartPlaying;
WavHelper.ChannelPlay(this._handle, this.Status == SoundPlayerStatus.Stoped);
this._status = SoundPlayerStatus.Playing;
this.OnPlayStatusChanged();
}
}
/// <summary>
/// 停止
/// </summary>
public void Stop()
{
if (this.ValidatePPSOperate(SoundPlayerStatus.Stoped))
{
this._status = SoundPlayerStatus.Stoping;
WavHelper.ChannelStop(this._handle);
this._status = SoundPlayerStatus.Stoped;
this.OnPlayStatusChanged();
}
}
/// <summary>
/// 暂停
/// </summary>
public void Pause()
{
if (this.ValidatePPSOperate(SoundPlayerStatus.Paused))
{
this._status = SoundPlayerStatus.Pausing;
WavHelper.ChannelPause(this._handle);
this._status = SoundPlayerStatus.Paused;
this.OnPlayStatusChanged();
}
}
/// <summary>
/// 获取音频文件信息
/// </summary>
/// <returns>音频文件信息</returns>
public BASS_CHANNELINFO_INTERNAL GetWavInfo()
{
if (this.HandleValid())
{
return(WavHelper.ChannelGetInfo(this._handle));
}
else
{
throw new WavException("未加载音频数据");
}
}
/// <summary>
/// 声音淡入淡出
/// </summary>
/// <param name="volValue">音量目标值</param>
/// <param name="duration">持续时间,单位/毫秒</param>
public void VoiceSlide(float volValue, int duration)
{
if (!this.HandleValid())
{
return;
}
//float value = 0.2f;
//int duration=2*1000;
WavHelper.ChannelSlideAttribute(this._handle, BASSAttribute.BASS_ATTRIB_VOL, volValue, duration);
}
/// <summary>
/// 获取实时FFT数据,float类型
/// </summary>
/// <param name="fftData">FFT数据存放数据</param>
/// <returns>获取到的FFT数据长度</returns>
public int GetFFTDataFloat(float[] fftData)
{
if (this.HandleValid())
{
return(WavHelper.ChannelGetData(this._handle, fftData, fftData.Length));
}
else
{
throw new ArgumentException("句柄无效");
}
}
/// <summary>
/// 播放状态改变通知
/// </summary>
protected override void OnPlayStatusChanged()
{
base.OnPlayStatusChanged();
var state = WavHelper.ChannelIsActive(base._handle);
if (state != BASSActive.BASS_ACTIVE_PAUSED &&
state != BASSActive.BASS_ACTIVE_PAUSED_DEVICE &&
state != BASSActive.BASS_ACTIVE_PLAYING)
{
this._waveInfo = null;
}
}
protected virtual void FreeBASS()
{
try
{
if (this.HandleValid())
{
WavHelper.StreamFree(this._handle);
this._handle = WavConstant.NONE_HANDLE;
}
}
catch (Exception ex)
{
WavLoger.OnRaiseLog(this, ex);
}
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="waveInfo">音频信息</param>
/// <param name="bufferCapcity">缓存容量,小于等于0自动计算</param>
public StreamSoundPlayer(WaveInfo waveInfo, int bufferCapcity = -1)
: base(SoundPlayerType.Stream)
{
this._waveInfo = waveInfo;
int bitByteCount;
BASSFlag flags;
switch (waveInfo.SampleBit)
{
case SampleType.Sample8Bit:
flags = BASSFlag.BASS_DEFAULT | BASSFlag.BASS_SAMPLE_8BITS;
bitByteCount = 1;
break;
case SampleType.Sample16Bit:
flags = BASSFlag.BASS_DEFAULT;
bitByteCount = 2;
break;
case SampleType.Sample32Bit:
flags = BASSFlag.BASS_DEFAULT | BASSFlag.BASS_SAMPLE_FLOAT;
bitByteCount = 4;
break;
default:
throw new NotImplementedException($"未实现的采样类型:{waveInfo.SampleBit.ToString()}");
}
if (bufferCapcity == -1)
{
bufferCapcity = waveInfo.SampleRate * waveInfo.ChannelCount * bitByteCount * 10;//默认缓存10秒数据
}
if (bufferCapcity > 0)
{
this._buffer = new byte[bufferCapcity];
}
this._streamProc = new STREAMPROC(this.StreamProcCallback);
base._handle = WavHelper.StreamCreate(waveInfo.SampleRate, waveInfo.ChannelCount, flags, this._streamProc, IntPtr.Zero);
//base._device = WavHelper.ChannelGetDevice(base._handle);
}
/// <summary>
/// 加载音频文件
/// </summary>
/// <param name="filePath">音频路径</param>
public void LoadWav(string filePath)
{
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException(nameof(filePath), "文件路径不能为空或null");
}
if (!File.Exists(filePath))
{
throw new FileNotFoundException("音频文件不存在", filePath);
}
this._fileName = filePath;
this.FreeBASS();
base._handle = WavHelper.StreamCreateFile(filePath);
this._playEndSyncHandle = WavHelper.ChannelSetSync(this._handle, BASSSync.BASS_SYNC_END, -1, this._playEndNotifyCallback, IntPtr.Zero);
//WavHelper.ChannelSetSync(this._handle, BASSSync.BASS_SYNC_MIXTIME, -1, this._playPositionChangedNotifyCallback, IntPtr.Zero);
this.SetPlayerAttribute();
}
/// <summary>
/// 获取设备数
/// </summary>
/// <returns>设备数</returns>
public static int GetDeviceCount()
{
int deviceCount = 0;
BASS_DEVICEINFO_INTERNAL info = new BASS_DEVICEINFO_INTERNAL();
for (int i = 0; ; i++)
{
if (WavHelper.GetDeviceInfo(i, ref info))
{
deviceCount++;
}
else
{
break;
}
}
return(deviceCount);
}
/// <summary>
/// 获取解码后的线性short数据
/// </summary>
/// <returns>解码后的线性short数据</returns>
public static PcmDataInfo GetPcmDataShort(string filePath)
{
if (string.IsNullOrWhiteSpace(filePath))
{
throw new ArgumentNullException(nameof(filePath));
}
if (!File.Exists(filePath))
{
throw new FileNotFoundException("源文件不存在", filePath);
}
int handle = WavHelper.StreamCreateFile(filePath, 0, 0, BASSFlag.BASS_UNICODE | BASSFlag.BASS_STREAM_DECODE);
try
{
long byteLength = WavHelper.ChannelGetLength(handle, BASSMode.BASS_POS_BYTE);
double durationSeconds = WavHelper.ChannelBytes2Seconds(handle, byteLength);
int shortCount = (int)(byteLength);
short[] pcmData = new short[shortCount];
int count = WavHelper.ChannelGetData(handle, pcmData, shortCount);
//注:结果数据长度之所以除以2,是因为short=2byte,bass获取数据时必须使用字节长度,否则数据会少一半;
//但是使用字节长度获取数据后,后一半数据又全是0,需要截取掉
count = count / 2;
short[] pcmDataSrc = pcmData;
pcmData = new short[count];
Array.Copy(pcmDataSrc, pcmData, count);
BASS_CHANNELINFO_INTERNAL wavInfo = WavHelper.ChannelGetInfo(handle);
return(new PcmDataInfo(wavInfo, durationSeconds, pcmData));
}
finally
{
WavHelper.StreamFree(handle);
}
}
/// <summary>
/// 获取解码后的线性byte数据
/// </summary>
/// <returns>解码后的线性byte数据</returns>
public static PcmDataInfo GetPcmDataByte(string filePath)
{
if (string.IsNullOrWhiteSpace(filePath))
{
throw new ArgumentNullException(nameof(filePath));
}
if (!File.Exists(filePath))
{
throw new FileNotFoundException("源文件不存在", filePath);
}
int handle = WavHelper.StreamCreateFile(filePath, 0, 0, BASSFlag.BASS_UNICODE | BASSFlag.BASS_STREAM_DECODE);
try
{
long byteLength = WavHelper.ChannelGetLength(handle, BASSMode.BASS_POS_BYTE);
double durationSeconds = WavHelper.ChannelBytes2Seconds(handle, byteLength);
byte[] pcmData = new byte[byteLength];
int count = WavHelper.ChannelGetData(handle, pcmData, (int)byteLength);
if (count != byteLength)
{
WavLoger.OnRaiseLog(filePath, $"获取到文件长度:{byteLength},读取到数据长度:{count},二者不一致,根据实际读取进行拷贝");
byte[] pcmDataSrc = pcmData;
pcmData = new byte[count];
Array.Copy(pcmDataSrc, pcmData, pcmData.Length);
}
BASS_CHANNELINFO_INTERNAL wavInfo = WavHelper.ChannelGetInfo(handle);
return(new PcmDataInfo(wavInfo, durationSeconds, pcmData));
}
finally
{
WavHelper.StreamFree(handle);
}
}
/// <summary>
/// 初始化声音输出设备
/// </summary>
/// <param name="device"> -1 = default device, 0 = no sound, 1 = first real output device. BASS_GetDeviceInfo can be used to enumerate the available devices. </param>
/// <param name="freq">输出率</param>
/// <param name="flags">A combination of these flags</param>
public static void InitDevice(int device, int freq, BASSInit flags)
{
WavHelper.Init(device, freq, flags);
}
protected void UpdateVolume()
{
WavHelper.ChannelSetVolume(this._handle, this._volume.Value);
}
protected void UpdateBalance()
{
WavHelper.ChannelSetAttribute(this._handle, BASSAttribute.BASS_ATTRIB_PAN, this._balance.Value);
}
/// <summary>
/// Frees all resources used by the output device, including all its samples, streams and MOD musics
/// </summary>
public static void Free()
{
WavHelper.Free();
}