tshooklib.cpp

packet DSCP tagger , can tag packets in differntial services , you can route packets from the router

#include <windows.h>
#include <mmsystem.h>
#include <speex_preprocess.h>

#pragma data_seg("SHARED")
struct SpeexPreprocessState *pp = NULL;
int nframes = 0;
int framesperblock = 0;
int framesize = 0;
#pragma data_seg()


extern "C" {

__declspec(dllexport) LRESULT CALLBACK CallWndProc(int nCode, WPARAM wParam, LPARAM lParam) {
	if (nCode == HC_ACTION) {
		MSG *msg = (MSG *) lParam;
		if (msg->message == MM_WIM_DATA) {
			WAVEHDR *hdr = (WAVEHDR *) msg->lParam;
			if ((hdr->dwBufferLength == hdr->dwBytesRecorded) && hdr->lpData) {
				if (pp == NULL) {
					int iarg;
					float farg;
					framesize = hdr->dwBufferLength / 2;

					while (framesize >= 512)
						framesize = framesize / 2;

					pp = speex_preprocess_state_init(framesize, 22050);
					framesperblock = hdr->dwBufferLength / (2 * framesize);

					iarg = 1;
					speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_DENOISE, &iarg);

					iarg = 1;
					speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_AGC, &iarg);
				    farg=8000;
    				speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_AGC_LEVEL, &farg);

					iarg = 1;
					speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_VAD, &iarg);

					iarg = 1;
					speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_DEREVERB, &iarg);
/*
					farg=.4;
   					speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_DEREVERB_DECAY, &farg);
   					farg=.3;
   					speex_preprocess_ctl(pp, SPEEX_PREPROCESS_SET_DEREVERB_LEVEL, &farg);
*/
				}
				int is_speech=0;
				for(int n=0;n<framesperblock;n++)
					if (speex_preprocess(pp, (short *) (hdr->lpData + n*framesize*2), NULL))
						is_speech = 1;
				if (! is_speech)
					for (int i=0; (i < hdr->dwBufferLength) && (i < hdr->dwBytesRecorded); i++)
						hdr->lpData[i] = 0;
				return 0;
			}
		}
	}
	return CallNextHookEx(NULL, nCode, wParam, lParam);
}

}