private readonly double STOP_FLOW_THRESHOLD = 0.01; // 停止检测流量阈值,当启动测试后如果流量对值小于阈值,则开始检测停止条件
public FlowValidator(double sampleRate, double calVolume = 1.0)
{
SAMPLE_RATE = sampleRate;
SAMPLE_TIME = 1000 / sampleRate;
m_waveAnalyzer = new WaveAnalyzer(sampleRate,
START_SAMPLE_COUNT, START_FLOW_DELTA,
STOP_SAMPLE_COUNT, STOP_FLOW_THRESHOLD);
CalVolume = calVolume;
m_waveAnalyzer.SampleStarted += (uint dataIndex, WaveSampleDirection direction) =>
{
/* 转换为呼吸方向 */
RespireDirection respireDir = ToRespireDirection(direction);
SampleStarted?.Invoke(dataIndex, respireDir);
};
m_waveAnalyzer.SampleStoped += (uint dataIndex, WaveSampleDirection direction, uint sampleIndex) =>
{
/* 转换为呼吸方向 */
RespireDirection respireDir = ToRespireDirection(direction);
SampleStoped?.Invoke(dataIndex, respireDir, sampleIndex);
};
}
/* 样本的呼吸方向 */
public RespireDirection SampleFlowDirection(uint sampleIndex)
{
/* 取得样本方向 */
WaveSampleDirection waveDir = m_waveAnalyzer.SampleDataDirection(sampleIndex);
/* 转换为呼吸方向 */
RespireDirection respireDir = ToRespireDirection(waveDir);
return(respireDir);
}
/* 转换为呼吸方向 */
private static RespireDirection ToRespireDirection(WaveSampleDirection waveDir)
{
RespireDirection respireDir = RespireDirection.None;
switch (waveDir)
{
case WaveSampleDirection.PositiveSample: // 正方向样本
respireDir = RespireDirection.Inspiration; // 吸气
break;
case WaveSampleDirection.NegativeSample: // 负方向样本
respireDir = RespireDirection.Expiration; // 呼气
break;
default:
break;
}
return(respireDir);
}
