'com_invoke' macro

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ManOfSteel

Joined: 02 Feb 2005
Posts: 1154

ManOfSteel 23 Apr 2007, 06:13

Hello,

I've got this MASM program and a "com_invoke" macro is used in important parts for calling DirectSound API as you can notice.

It is used like that:

Code:

com_invoke IDirectSound, SetCooperativeLevel, pDS, hWnd, DSSCL_NORMAL
...
com_invoke IDirectSound, CreateSoundBuffer, pDS, ADDR desc, ADDR pDSB, 0
...
com_invoke IDirectSoundBuffer, Stop, pDSB

According to some comments, it seems to be a "macro to call COM functions given a struct of function ptr's."

So, does anyone know what this "com_invoke" macro MAY really do, because it's not very helpful like that?

thanks in advance for your replies.

23 Apr 2007, 06:13

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 23 Apr 2007, 08:14

see "INCLUDE/COM32" in FASM directory

23 Apr 2007, 08:14

farrier

Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi

farrier 24 Apr 2007, 09:15

ManOfSteel,

Attached is a RadASM project using DirectSound to record from an iMic USB sound card, write to a .wav file, and then play back the recorded sound from the DirectSound buffer. It just records 8 seconds, but should show you how things work. It uses an include file from a package madmatt provided, link is inlcuded. Thanks madmatt!!!

If I get time, I plan to modify the program to record continuously and then as the sound is recorded, convert to mp3 using LAME.

hth,

farrier

Description:		Download
Filename:	DSRecord.zip
Filesize:	5.47 KB
Downloaded:	293 Time(s)

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24 Apr 2007, 09:15

ManOfSteel

Joined: 02 Feb 2005
Posts: 1154

ManOfSteel 26 Apr 2007, 09:51

vid,
thanks, I didn't even know such thing existed in FASM. I guess I'll have to re-read the manual.

farrier,
thanks for sharing. I'll check it out as soon as I can.
Why did you say it was for recording from a "iMic USB sound card"? Does it work for other cards?

26 Apr 2007, 09:51

farrier

Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi

farrier 26 Apr 2007, 16:56

ManOfSteel,

The code I included let me choose the iMic as the Capture device on my notebook system, which has no Line-In. Otherwise, the default sound card is used. If you use my code "as-is", it should use your default device.

Also, change the size of the capture buffer size as follows:

Code:

    mov     [dscbd.dwBufferBytes], 1764000          ;= WaveEx.nAvgBytesPerSec * 10

I found an occasional problem trying to record 8 "sleep" seconds of data in an 8 second buffer. Sometimes, it "slept" to long, and recorded too much.

hth,

farrier

26 Apr 2007, 16:56

ManOfSteel

Joined: 02 Feb 2005
Posts: 1154

ManOfSteel 27 Apr 2007, 07:54

Hello,
and thanks again.
Could you upload the DirectX include files that are needed for audio processing (those you have in "\Program Files\fasm\include\directx\")? I can't find them anywhere.
Do they also contain the interfaces identifiers (or whatever they are called?)

27 Apr 2007, 07:54

farrier

Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi

farrier 27 Apr 2007, 13:48

ManOfSteel,

The link to madmatt's DirectX includes is in this source code, on the same lines where the .inc file is "included"

farrier

27 Apr 2007, 13:48

ManOfSteel

Joined: 02 Feb 2005
Posts: 1154

ManOfSteel 28 Apr 2007, 07:40

oops, sorry, there are so many tabs before the link that it was off-screen and I missed it. Embarassed

28 Apr 2007, 07:40

farrier

Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi

farrier 28 Apr 2007, 08:03

Here is part 2 of my project:

This one again records 8 seconds of sound using DirectSound, then writes that data to a .wav file, then converts the raw data into an MP3 file using LAME. I used the lame_enc.dll file obtained from:

http://rarewares.org/mp3.html

Main LAME site:

www.mp3dev.org

Seems to work pretty well. After I play with the quality settings, I plan to do continuous recording with DirectSound, and then continuous recording and streaming conversion to MP3

Fun so far!

farrier

Description:		Download
Filename:	DSRecConv.zip
Filesize:	9.98 KB
Downloaded:	279 Time(s)

28 Apr 2007, 08:03

ManOfSteel

Joined: 02 Feb 2005
Posts: 1154

ManOfSteel 29 Apr 2007, 05:37

Very nice. Keep up with the good work!

29 Apr 2007, 05:37

farrier

Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi

farrier 09 May 2007, 01:11

Here is the next version, will record continuously to a wav file from a default--or in my case an external USB sound card--until a user set--in .inc file--number of milliseconds expires. Next step, acquire PCM data and immediately convert this stream to an mp3 file, bypassing .wav file entirely.

farrier

Description:		Download
Filename:	DSRecCont.zip
Filesize:	7.31 KB
Downloaded:	284 Time(s)

09 May 2007, 01:11

ManOfSteel

Joined: 02 Feb 2005
Posts: 1154

ManOfSteel 13 May 2007, 17:32

It's getting very good. Thanks for sharing. If it was just a little more user friendly (record/play control buttons and the like) you would be competing with some commercial recording utilities.
And by the way, I like the icon!

13 May 2007, 17:32

dead_body

Joined: 21 Sep 2005
Posts: 187
Location: Ukraine,Kharkov

dead_body 13 May 2007, 20:54

hm... "enum" - is macro?

"ENUM DSFX_I3DL2_MATERIAL_PRESET_SINGLEWINDOW,\
..."

in dsound.inc

where I can find enum macro?

13 May 2007, 20:54

farrier

Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi

farrier 14 May 2007, 16:59

dead_body,

Look here:

http://board.flatassembler.net/topic.php?t=4729

Also:

http://com.it-berater.org/COM/com_development/DirectX/directx_constants.htm

shows the actual values.

hth,

farrier

14 May 2007, 16:59

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