DirectSound Buffers

Graphics and GPU Programming Programming

Started by Hedphoniks January 29, 2006 07:13 AM

2 comments, last by Hedphoniks 18 years, 2 months ago

122

Author

January 29, 2006 07:13 AM

I have created a simple media player in VB.Net which allows me to stream a wav file using primary and secondary buffers. I want to be able to access the actual samples in the buffers so I can play a .wav file in reverse. Is it possible to gain access to the sample data through either the secondary or primary buffer? If so, how do I go about doin this? Thanks

JoystickX

114

January 29, 2006 10:31 AM

through buffer locking

d000hg

1,208

January 30, 2006 02:05 AM

Yep. If you're familiar with D3D it's exactly like locking a texture/surface/vertex buffer to access the raw data. Look up 'Lock' in the SDK and one entry will be for the soundbuffer interface. You could do:

Create buffer1 from sound.wavCreate buffer2 with same settings as buffer1.Lock both buffers to get pointers to each buffer's data.Copy data from buffer2->buffer1 in whatever way you want.

I beleive you can lock with flags to tell DSound you only wish to read or only wish to write to the buffer, which can be faster (I know D3D does this anyway).