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);
}
}
// 引数に与えた bitmap は上下反転される
public void AddFrame(Bitmap bitmap)
{
if (is_first)
{
int bit_count = PixelFormatToBitCount(bitmap.PixelFormat);
width_ = bitmap.Width;
height_ = bitmap.Height;
pixel_format_ = bitmap.PixelFormat;
stride_ = (width_ * bit_count / 8 + 3) & ~3;
CreateVideoStream(width_, height_, stride_, rate_, scale_);
SetVideoFormat(width_, height_, stride_, bit_count);
is_first = false;
}
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
BitmapData bmp_data = bitmap.LockBits(new Rectangle(0, 0, width_, height_), ImageLockMode.ReadOnly, pixel_format_);
int hr = VfwApi.AVIStreamWrite(pavi_, current_frame_, 1, bmp_data.Scan0, stride_ * height_, 16, IntPtr.Zero, IntPtr.Zero);
if (hr != 0)
{
throw new VfwException("AVIStreamWrite", hr);
}
bitmap.UnlockBits(bmp_data);
++current_frame_;
}