public void append(double[] left, double[] right, int length)
{
while (RateConvertContext.convert(mContext, left, right, length))
{
mReceiver.append(mContext.bufferLeft, mContext.bufferRight, mContext.length);
}
}
public static void run()
{
string dir = System.Windows.Forms.Application.StartupPath;
const int LEN = 100000;
const int BUFLEN = 1000;
// 元データのサンプルレート
int rate_from = 48000;
// 変換するサンプルレート
int rate_to = 44100;
// 何ヘルツの音のサイン波を作るか
const double hz = 440.0;
// 周期
double period = 1.0 / hz;
RateConvertContext c = new RateConvertContext(rate_from, rate_to);
double[] left = new double[BUFLEN];
double[] right = new double[BUFLEN];
int j = 0;
int total_s = 0;
int total_d = 0;
using (System.IO.StreamWriter sw_src = new System.IO.StreamWriter(System.IO.Path.Combine(dir, "TestRateConvertContext_src.txt")))
using (System.IO.StreamWriter sw_dst = new System.IO.StreamWriter(System.IO.Path.Combine(dir, "TestRateConvertContext_dst.txt"))) {
for (int i = 0; i < LEN; i++)
{
double x = i / (double)rate_from;
double y = Math.Sin(2.0 * Math.PI * x / period);
left[j] = y;
right[j] = y;
j++;
if (j >= BUFLEN)
{
// srcログに時系列データを書き込み
for (int k = 0; k < BUFLEN; k++)
{
double sx = total_s / (double)rate_from;
sw_src.WriteLine(sx + "\t" + left[k]);
total_s++;
}
while (RateConvertContext.convert(c, left, right, j))
{
for (int k = 0; k < c.length; k++)
{
double dx = total_d / (double)rate_to;
sw_dst.WriteLine(dx + "\t" + c.bufferRight[k]);
total_d++;
}
}
j = 0;
}
}
if (j > 0)
{
// srcログに時系列データを書き込み
for (int k = 0; k < BUFLEN; k++)
{
double sx = total_s / (double)rate_from;
sw_src.WriteLine(sx + "\t" + left[k]);
total_s++;
}
while (RateConvertContext.convert(c, left, right, j))
{
for (int k = 0; k < c.length; k++)
{
double dx = total_d / (double)rate_to;
sw_dst.WriteLine(dx + "\t" + c.bufferRight[k]);
total_d++;
}
}
}
}
}