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/*
* Copyright (C) 1997-2003 Kare Sjolander <kare@speech.kth.se>
*
* This file contains a sample module which demonstrates how to write
* extensions to the Snack sound extension for Tcl/Tk.
* The latest version of Snack can be found at http://www.speech.kth.se/snack/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "snack.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Windows magic */
#if defined(__WIN32__)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#define EXPORT(a,b) __declspec(dllexport) a b
BOOL APIENTRY
DllMain(HINSTANCE hInst, DWORD reason, LPVOID reserved)
{
return TRUE;
}
#else
#define EXPORT(a,b) a b
#endif
int
Square(ClientData cdata, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
Sound *sound;
int i;
/* Get the sound structure for this sound */
sound = Snack_GetSound(interp, Tcl_GetStringFromObj(objv[0], NULL));
/* create a simple square wave */
for (i = 0; i < Snack_GetLength(sound); i++) {
if ((i/10)%2) {
Snack_SetSample(sound, 0, i, 10000.0f);
} else {
Snack_SetSample(sound, 0, i, -10000.0f);
}
}
/* update the max/min members of the sound structure */
Snack_UpdateExtremes(sound, 0, sound->length, SNACK_NEW_SOUND);
/* execute callbacks for stuff like canvas items */
Snack_ExecCallbacks(sound, SNACK_NEW_SOUND);
return TCL_OK;
}
/*
Initialize the square package and create a new sound command 'square'.
The syntax is: sndName square
*/
EXPORT(int, Square_Init)(Tcl_Interp *interp)
{
#ifdef USE_TCL_STUBS
if (Tcl_InitStubs(interp, "8", 0) == NULL) {
return TCL_ERROR;
}
#endif
#ifdef USE_TK_STUBS
if (Tk_InitStubs(interp, "8", 0) == NULL) {
return TCL_ERROR;
}
#endif
#ifdef USE_SNACK_STUBS
if (Snack_InitStubs(interp, "2", 0) == NULL) {
return TCL_ERROR;
}
#endif
if (Tcl_PkgProvide(interp, "square", "1.0") != TCL_OK) {
return TCL_ERROR;
}
Snack_AddSubCmd(SNACK_SOUND_CMD, "square", (Snack_CmdProc *) Square, NULL);
return TCL_OK;
}
EXPORT(int, Square_SafeInit)(Tcl_Interp *interp)
{
return Square_Init(interp);
}
#ifdef __cplusplus
}
#endif
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