static void Test()
{
SF2 sf2 = new SF2("g:\\test.sf2");
List <short> samples = sf2.SoundChunk.SMPLSubChunk.samples;
PCMProcesser pcmProcesser = new PCMProcesser();
short[] newSamples = pcmProcesser.PitchPcmNote(samples.ToArray(), 24);
// pitch.Seq(samples.ToArray());
pcm_buffer = new byte[newSamples.Length * 2];
int idx = 0;
for (int i = 0; i < newSamples.Length; i++)
{
pcm_buffer[idx++] = (byte)(newSamples[i] & 0xff);
pcm_buffer[idx++] = (byte)((newSamples[i] >> 8) & 0xff);
}
float newTime = pcmProcesser.GetPcmTime(newSamples, 44100);
SDL_AudioSpec OutputAudioSpec = new SDL_AudioSpec();
OutputAudioSpec.freq = 44100;
OutputAudioSpec.format = AUDIO_S16;
OutputAudioSpec.channels = 1;
OutputAudioSpec.samples = 1024;
OutputAudioSpec.callback = SDL_AudioCallback;
if (SDL_AudioInit(null) < 0)
{
return;
}
IntPtr n = IntPtr.Zero;
if (SDL_OpenAudio(ref OutputAudioSpec, n) < 0)
{
return;
}
audio_len = pcm_buffer.Length; //长度为读出数据长度，在read_audio_data中做减法
audio_pos = pcm_buffer;
audio_idx = 0;
SDL_PauseAudio(0);
SDL_Delay((uint)(Math.Round(newTime) * 1000));
}
public ChartApp(ScMgr scMgr)
{
SF2 sf2 = new SF2("g:\\test.sf2");
List <short> samples = sf2.SoundChunk.SMPLSubChunk.samples;
pcmProcesser = new PCMProcesser();
short[] newSamples = pcmProcesser.PitchPcmNote(samples.ToArray(), -24, true, 10);
pcm_buffer = new byte[newSamples.Length * 2];
int idx = 0;
for (int i = 0; i < newSamples.Length; i++)
{
pcm_buffer[idx++] = (byte)(newSamples[i] & 0xff);
pcm_buffer[idx++] = (byte)((newSamples[i] >> 8) & 0xff);
}
List <short> shortBufs = new List <short>();
short val;
for (int i = 0; i < pcm_buffer.Length; i += 2)
{
val = (short)((pcm_buffer[i + 1] << 8) | pcm_buffer[i]);
shortBufs.Add(val);
}
List <float> floatBufs = new List <float>();
for (int i = 0; i < pcm_buffer.Length; i += 2)
{
val = (short)((pcm_buffer[i + 1] << 8) | pcm_buffer[i]);
floatBufs.Add(val);
}
pcm = shortBufs.ToArray();
float[] seqDatas = pcmProcesser.CreatePcmFreqNormAmpSpectrum(pcm, 44100);
List <float> samplesFloat = new List <float>();
for (int i = 0; i < shortBufs.Count; i++)
{
samplesFloat.Add(shortBufs[i]);
}
this.scMgr = scMgr;
root = scMgr.GetRootLayer();
ScChart chart = new ScChart(scMgr);
chart.GetAxisXSeq = GetAxisXSeq;
chart.Datas = samplesFloat.ToArray();
// chart.DataLineColor = Color.Blue;
// chart.XAxisColor = Color.White;
// chart.DataRange = new DrawDataRange(0, 5000);
chart.xAxisSeqCount = 10;
chart.Dock = ScDockStyle.Fill;
// chart.BackgroundColor = Color.Black;
root.Add(chart);
}