public void AddWave(string wave_filename)
{
byte[] wave_data = File.ReadAllBytes(wave_filename);
MemoryStream header = new MemoryStream();
header.Write(wave_data, 0, 36);
header.Seek(0, SeekOrigin.Begin);
BinaryReader reader = new BinaryReader(header);
reader.ReadBytes(20);
IntPtr wave_ptr = Marshal.AllocHGlobal(wave_data.Length);
IntPtr wave_data_ptr = new IntPtr(wave_ptr.ToInt32() + 44);
try
{
Marshal.Copy(wave_data, 0, wave_ptr, wave_data.Length);
VfwApi.PCMWAVEFORMAT pwformat = new VfwApi.PCMWAVEFORMAT();
pwformat.wFormatTag = reader.ReadInt16();
pwformat.nChannels = reader.ReadInt16();
pwformat.nSamplesPerSec = reader.ReadInt32();
pwformat.nAvgBytesPerSec = reader.ReadInt32();
pwformat.nBlockAlign = reader.ReadInt16();
pwformat.wBitsPerSample = reader.ReadInt16();
int sample_size = pwformat.nChannels * pwformat.wBitsPerSample / 8;
CreateAudioStream(pwformat.nSamplesPerSec, (wave_data.Length - 44) / sample_size, sample_size);
int hr = VfwApi.AVIStreamSetFormat(pavi_audio_, 0, ref pwformat, Marshal.SizeOf(pwformat));
if (hr != 0)
{
throw new VfwException("AVIStreamSetFormat", hr);
}
hr = VfwApi.AVIStreamWrite(pavi_audio_, 0, wave_data.Length - 44, wave_data_ptr,
wave_data.Length - 44, 16, IntPtr.Zero, IntPtr.Zero);
if (hr != 0)
{
throw new VfwException("AVIStreamWrite", hr);
}
VfwApi.AVIStreamRelease(pavi_audio_);
pavi_audio_ = IntPtr.Zero;
}
finally
{
Marshal.FreeHGlobal(wave_ptr);
}
}
private void SetVideoFormat(int width, int height, int stride, int bit_count)
{
VfwApi.BITMAPINFOHEADER binfo = new VfwApi.BITMAPINFOHEADER();
binfo.biSize = Marshal.SizeOf(binfo);
binfo.biWidth = width;
binfo.biHeight = height;
binfo.biPlanes = 1;
binfo.biBitCount = (short)bit_count;
binfo.biCompression = 0;
binfo.biSizeImage = height * stride;
binfo.biXPelsPerMeter = 0;
binfo.biYPelsPerMeter = 0;
binfo.biClrUsed = 0;
binfo.biClrImportant = 0;
int hr = VfwApi.AVIStreamSetFormat(pavi_, 0, ref binfo, binfo.biSize);
if (hr != 0)
{
throw new VfwException("AVIStreamSetFormat", hr);
}
}