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vgmstream/winamp/in_vgmstream.c

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/* Winamp plugin interface for vgmstream */
/* Based on: */
/*
** Example Winamp .RAW input plug-in
** Copyright (c) 1998, Justin Frankel/Nullsoft Inc.
*/
#ifdef _MSC_VER
#define _CRT_SECURE_NO_DEPRECATE
#endif
#include <windows.h>
#include <windowsx.h>
#include <commctrl.h>
#include <stdio.h>
#include <io.h>
#include <string.h>
#include <ctype.h>
#include "../src/formats.h"
#include "../src/vgmstream.h"
#include "in2.h"
#include "wa_ipc.h"
#include "resource.h"
#ifndef VERSION
#include "../version.h"
#endif
#ifndef VERSION
#define VERSION "(unknown version)"
#endif
#define APP_NAME "vgmstream plugin"
#define PLUGIN_DESCRIPTION "vgmstream plugin " VERSION " " __DATE__
#define INI_NAME "plugin.ini"
/* post when playback stops */
#define WM_WA_MPEG_EOF WM_USER+2
In_Module input_module; /* the input module, declared at the bottom of this file */
DWORD WINAPI __stdcall decode(void *arg);
char lastfn[MAX_PATH+1] = {0}; /* name of the currently playing file */
short sample_buffer[576*2*2]; /* 576 16-bit samples, stereo, possibly doubled in size for DSP */
#define DEFAULT_FADE_SECONDS "10.00"
#define DEFAULT_FADE_DELAY_SECONDS "0.00"
#define DEFAULT_LOOP_COUNT "2.00"
#define DEFAULT_THREAD_PRIORITY 3
#define DEFAULT_LOOP_FOREVER 0
#define DEFAULT_IGNORE_LOOP 0
#define FADE_SECONDS_INI_ENTRY "fade_seconds"
#define FADE_DELAY_SECONDS_INI_ENTRY "fade_delay"
#define LOOP_COUNT_INI_ENTRY "loop_count"
#define THREAD_PRIORITY_INI_ENTRY "thread_priority"
#define LOOP_FOREVER_INI_ENTRY "loop_forever"
#define IGNORE_LOOP_INI_ENTRY "ignore_loop"
double fade_seconds;
double fade_delay_seconds;
double loop_count;
int thread_priority;
int loop_forever;
int ignore_loop;
char *priority_strings[] = {"Idle","Lowest","Below Normal","Normal","Above Normal","Highest (not recommended)","Time Critical (not recommended)"};
int priority_values[] = {THREAD_PRIORITY_IDLE,THREAD_PRIORITY_LOWEST,THREAD_PRIORITY_BELOW_NORMAL,THREAD_PRIORITY_NORMAL,THREAD_PRIORITY_ABOVE_NORMAL,THREAD_PRIORITY_HIGHEST,THREAD_PRIORITY_TIME_CRITICAL};
VGMSTREAM * vgmstream = NULL;
HANDLE decode_thread_handle = INVALID_HANDLE_VALUE;
int paused = 0;
int decode_abort = 0;
int seek_needed_samples = -1;
int decode_pos_ms = 0;
int decode_pos_samples = 0;
int stream_length_samples = 0;
int fade_samples = 0;
/* Winamp Play extension list, needed to accept/play and associate extensions in Windows */
#define EXTENSION_LIST_SIZE VGM_EXTENSION_LIST_CHAR_SIZE * 6
char working_extension_list[EXTENSION_LIST_SIZE] = {0};
#define EXT_BUFFER_SIZE 200
static void add_extension(int length, char * dst, const char * src);
static void build_extension_list();
void about(HWND hwndParent) {
MessageBox(hwndParent,
PLUGIN_DESCRIPTION "\n"
"by hcs, FastElbja, manakoAT, bxaimc, and snakemeat\n\n"
"http://sourceforge.net/projects/vgmstream"
,"about in_vgmstream",MB_OK);
}
void quit() {}
void GetINIFileName(char * iniFile) {
/* if we're running on a newer winamp version that better supports
* saving of settings to a per-user directory, use that directory - if not
* then just revert to the old behaviour */
if(IsWindow(input_module.hMainWindow) && SendMessage(input_module.hMainWindow, WM_WA_IPC,0,IPC_GETVERSION) >= 0x5000) {
char * iniDir = (char *)SendMessage(input_module.hMainWindow, WM_WA_IPC, 0, IPC_GETINIDIRECTORY);
strncpy(iniFile, iniDir, MAX_PATH);
strncat(iniFile, "\\Plugins\\", MAX_PATH);
/* can't be certain that \Plugins already exists in the user dir */
CreateDirectory(iniFile,NULL);
strncat(iniFile, INI_NAME, MAX_PATH);
}
else {
char * lastSlash;
GetModuleFileName(NULL, iniFile, MAX_PATH);
lastSlash = strrchr(iniFile, '\\');
*(lastSlash + 1) = 0;
strncat(iniFile, "Plugins\\" INI_NAME,MAX_PATH);
}
}
void init() {
char iniFile[MAX_PATH+1];
char buf[256];
int consumed;
GetINIFileName(iniFile);
thread_priority=GetPrivateProfileInt(APP_NAME,THREAD_PRIORITY_INI_ENTRY,DEFAULT_THREAD_PRIORITY,iniFile);
if (thread_priority < 0 || thread_priority > 6) {
sprintf(buf,"%d",DEFAULT_THREAD_PRIORITY);
WritePrivateProfileString(APP_NAME,THREAD_PRIORITY_INI_ENTRY,buf,iniFile);
thread_priority = DEFAULT_THREAD_PRIORITY;
}
GetPrivateProfileString(APP_NAME,FADE_SECONDS_INI_ENTRY,DEFAULT_FADE_SECONDS,buf,sizeof(buf),iniFile);
if (sscanf(buf,"%lf%n",&fade_seconds,&consumed)<1 || consumed!=strlen(buf) || fade_seconds < 0) {
WritePrivateProfileString(APP_NAME,FADE_SECONDS_INI_ENTRY,DEFAULT_FADE_SECONDS,iniFile);
sscanf(DEFAULT_FADE_SECONDS,"%lf",&fade_seconds);
}
GetPrivateProfileString(APP_NAME,FADE_DELAY_SECONDS_INI_ENTRY,DEFAULT_FADE_DELAY_SECONDS,buf,sizeof(buf),iniFile);
if (sscanf(buf,"%lf%n",&fade_delay_seconds,&consumed)<1 || consumed!=strlen(buf)) {
WritePrivateProfileString(APP_NAME,FADE_DELAY_SECONDS_INI_ENTRY,DEFAULT_FADE_DELAY_SECONDS,iniFile);
sscanf(DEFAULT_FADE_DELAY_SECONDS,"%lf",&fade_delay_seconds);
}
GetPrivateProfileString(APP_NAME,LOOP_COUNT_INI_ENTRY,DEFAULT_LOOP_COUNT,buf,sizeof(buf),iniFile);
if (sscanf(buf,"%lf%n",&loop_count,&consumed)!=1 || consumed!=strlen(buf) || loop_count < 0) {
WritePrivateProfileString(APP_NAME,LOOP_COUNT_INI_ENTRY,DEFAULT_LOOP_COUNT,iniFile);
sscanf(DEFAULT_LOOP_COUNT,"%lf",&loop_count);
}
loop_forever=GetPrivateProfileInt(APP_NAME,LOOP_FOREVER_INI_ENTRY,DEFAULT_LOOP_FOREVER,iniFile);
ignore_loop=GetPrivateProfileInt(APP_NAME,IGNORE_LOOP_INI_ENTRY,DEFAULT_IGNORE_LOOP,iniFile);
if (loop_forever && ignore_loop) {
sprintf(buf,"%d",DEFAULT_LOOP_FOREVER);
WritePrivateProfileString(APP_NAME,LOOP_FOREVER_INI_ENTRY,buf,iniFile);
loop_forever = DEFAULT_LOOP_FOREVER;
sprintf(buf,"%d",DEFAULT_IGNORE_LOOP);
WritePrivateProfileString(APP_NAME,IGNORE_LOOP_INI_ENTRY,buf,iniFile);
ignore_loop = DEFAULT_IGNORE_LOOP;
}
build_extension_list();
}
/* we don't recognize protocols */
int isourfile(char *fn) { return 0; }
/* request to start playing a file */
int play(char *fn)
{
int max_latency;
/* don't lose a pointer! */
if (vgmstream) {
/* TODO: this should either pop up an error box or close the file */
return 1;
}
/* open the stream, set up */
vgmstream = init_vgmstream(fn);
/* were we able to open it? */
if (!vgmstream) {
return 1;
}
if (ignore_loop) vgmstream->loop_flag = 0;
/* will we be able to play it? */
if (vgmstream->channels <= 0) {
close_vgmstream(vgmstream);
vgmstream=NULL;
return 1;
}
/* Remember that name, friends! */
strncpy(lastfn,fn,MAX_PATH);
/* open the output plugin */
max_latency = input_module.outMod->Open(vgmstream->sample_rate,vgmstream->channels,
16, 0, 0);
/* were we able to open it? */
if (max_latency < 0) {
close_vgmstream(vgmstream);
vgmstream=NULL;
return 1;
}
/* Set info display */
/* TODO: actual bitrate */
input_module.SetInfo(get_vgmstream_average_bitrate(vgmstream)/1000,vgmstream->sample_rate/1000,vgmstream->channels,1);
/* setup visualization */
input_module.SAVSAInit(max_latency,vgmstream->sample_rate);
input_module.VSASetInfo(vgmstream->sample_rate,vgmstream->channels);
decode_abort = 0;
seek_needed_samples = -1;
decode_pos_ms = 0;
decode_pos_samples = 0;
paused = 0;
stream_length_samples = get_vgmstream_play_samples(loop_count,fade_seconds,fade_delay_seconds,vgmstream);
fade_samples = (int)(fade_seconds * vgmstream->sample_rate);
decode_thread_handle = CreateThread(
NULL, /* handle cannot be inherited */
0, /* stack size, 0=default */
decode, /* thread start routine */
NULL, /* no parameter to start routine */
0, /* run thread immediately */
NULL); /* don't keep track of the thread id */
SetThreadPriority(decode_thread_handle,priority_values[thread_priority]);
return 0;
}
/* pausing... */
void pause() { paused=1; input_module.outMod->Pause(1); }
void unpause() {paused=0; input_module.outMod->Pause(0); }
int ispaused() { return paused; }
/* stop playback */
void stop() {
if (decode_thread_handle != INVALID_HANDLE_VALUE) {
decode_abort=1;
/* arbitrary wait length */
if (WaitForSingleObject(decode_thread_handle,1000) == WAIT_TIMEOUT) {
/* TODO: error? */
TerminateThread(decode_thread_handle,0);
}
CloseHandle(decode_thread_handle);
decode_thread_handle = INVALID_HANDLE_VALUE;
}
if (vgmstream) {
close_vgmstream(vgmstream);
vgmstream=NULL;
}
input_module.outMod->Close();
input_module.SAVSADeInit();
}
/* get current stream length */
int getlength() {
return stream_length_samples*1000LL/vgmstream->sample_rate;
}
/* get current output time */
int getoutputtime() {
return decode_pos_ms+(input_module.outMod->GetOutputTime()-input_module.outMod->GetWrittenTime());
}
/* seek */
void setoutputtime(int t) {
if (vgmstream)
seek_needed_samples = (long long)t * vgmstream->sample_rate / 1000LL;
}
/* pass these commands through */
void setvolume(int volume) { input_module.outMod->SetVolume(volume); }
void setpan(int pan) { input_module.outMod->SetPan(pan); }
/* display information */
int infoDlg(char *fn, HWND hwnd) {
VGMSTREAM * infostream = NULL;
char description[1024];
description[0]='\0';
concatn(sizeof(description),description,PLUGIN_DESCRIPTION "\n\n");
if (!fn || !*fn) {
if (!vgmstream) return 0;
describe_vgmstream(vgmstream,description,sizeof(description));
} else {
infostream = init_vgmstream(fn);
if (!infostream) return 0;
describe_vgmstream(infostream,description,sizeof(description));
close_vgmstream(infostream);
infostream=NULL;
}
MessageBox(hwnd,description,"Stream info",MB_OK);
return 0;
}
/* retrieve information on this or possibly another file */
void getfileinfo(char *filename, char *title, int *length_in_ms) {
if (!filename || !*filename) /* currently playing file*/
{
if (!vgmstream) return;
if (length_in_ms) *length_in_ms=getlength();
if (title)
{
char *p=lastfn+strlen(lastfn);
while (*p != '\\' && p >= lastfn) p--;
strcpy(title,++p);
}
}
else /* some other file */
{
VGMSTREAM * infostream;
if (length_in_ms)
{
*length_in_ms=-1000;
if ((infostream=init_vgmstream(filename)))
{
*length_in_ms = get_vgmstream_play_samples(loop_count,fade_seconds,fade_delay_seconds,infostream)*1000LL/infostream->sample_rate;
close_vgmstream(infostream);
infostream=NULL;
}
}
if (title)
{
char *p=filename+strlen(filename);
while (*p != '\\' && p >= filename) p--;
strcpy(title,++p);
}
}
}
/* nothin' */
void eq_set(int on, char data[10], int preamp) {}
/* the decode thread */
DWORD WINAPI __stdcall decode(void *arg) {
/* channel count shouldn't change during decode */
int max_buffer_samples = sizeof(sample_buffer)/sizeof(sample_buffer[0])/2/vgmstream->channels;
while (!decode_abort) {
int samples_to_do;
int l;
if (decode_pos_samples+max_buffer_samples>stream_length_samples && (!loop_forever || !vgmstream->loop_flag))
samples_to_do=stream_length_samples-decode_pos_samples;
else
samples_to_do=max_buffer_samples;
/* play 'till the end of this seek, or note if we're done seeking */
if (seek_needed_samples != -1) {
/* reset if we need to seek backwards */
if (seek_needed_samples < decode_pos_samples) {
reset_vgmstream(vgmstream);
if (ignore_loop) vgmstream->loop_flag = 0;
decode_pos_samples = 0;
decode_pos_ms = 0;
}
if (decode_pos_samples < seek_needed_samples) {
samples_to_do=seek_needed_samples-decode_pos_samples;
if (samples_to_do>max_buffer_samples) samples_to_do=max_buffer_samples;
} else
seek_needed_samples = -1;
input_module.outMod->Flush((int)decode_pos_ms);
}
l = (samples_to_do*vgmstream->channels*2)<<(input_module.dsp_isactive()?1:0);
if (samples_to_do == 0) {
input_module.outMod->CanWrite(); /* ? */
if (!input_module.outMod->IsPlaying()) {
PostMessage(input_module.hMainWindow, /* message dest */
WM_WA_MPEG_EOF, /* message id */
0,0); /* no parameters */
return 0;
}
Sleep(10);
}
else if (seek_needed_samples != -1) {
render_vgmstream(sample_buffer,samples_to_do,vgmstream);
decode_pos_samples+=samples_to_do;
decode_pos_ms=decode_pos_samples*1000LL/vgmstream->sample_rate;
}
else if (input_module.outMod->CanWrite() >= l) {
/* let vgmstream do its thing */
render_vgmstream(sample_buffer,samples_to_do,vgmstream);
/* fade! */
if (vgmstream->loop_flag && fade_samples > 0 && !loop_forever) {
int samples_into_fade = decode_pos_samples - (stream_length_samples - fade_samples);
if (samples_into_fade + samples_to_do > 0) {
int j,k;
for (j=0;j<samples_to_do;j++,samples_into_fade++) {
if (samples_into_fade > 0) {
double fadedness = (double)(fade_samples-samples_into_fade)/fade_samples;
for (k=0;k<vgmstream->channels;k++) {
sample_buffer[j*vgmstream->channels+k] =
(short)(sample_buffer[j*vgmstream->channels+k]*fadedness);
}
}
}
}
}
input_module.SAAddPCMData((char*)sample_buffer,vgmstream->channels,16,decode_pos_ms);
input_module.VSAAddPCMData((char*)sample_buffer,vgmstream->channels,16,decode_pos_ms);
decode_pos_samples+=samples_to_do;
decode_pos_ms=decode_pos_samples*1000LL/vgmstream->sample_rate;
if (input_module.dsp_isactive())
l =input_module.dsp_dosamples(sample_buffer,samples_to_do,16,vgmstream->channels,vgmstream->sample_rate) *
2 * vgmstream->channels;
input_module.outMod->Write((char*)sample_buffer,l);
} /* if we can write enough */
else Sleep(20);
} /* main loop */
return 0;
}
INT_PTR CALLBACK configDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) {
char buf[256];
char iniFile[MAX_PATH+1];
static int mypri;
HANDLE hSlider;
switch (uMsg) {
case WM_CLOSE:
EndDialog(hDlg,TRUE);
return TRUE;
case WM_INITDIALOG:
GetINIFileName(iniFile);
/* set CPU Priority slider */
hSlider=GetDlgItem(hDlg,IDC_THREAD_PRIORITY_SLIDER);
SendMessage(hSlider, TBM_SETRANGE,
(WPARAM) TRUE, /* redraw flag */
(LPARAM) MAKELONG(1, 7)); /* min. & max. positions */
SendMessage(hSlider, TBM_SETPOS,
(WPARAM) TRUE, /* redraw flag */
(LPARAM) thread_priority+1);
mypri=thread_priority;
SetDlgItemText(hDlg,IDC_THREAD_PRIORITY_TEXT,priority_strings[thread_priority]);
sprintf(buf,"%.2lf",fade_seconds);
SetDlgItemText(hDlg,IDC_FADE_SECONDS,buf);
sprintf(buf,"%.2lf",fade_delay_seconds);
SetDlgItemText(hDlg,IDC_FADE_DELAY_SECONDS,buf);
sprintf(buf,"%.2lf",loop_count);
SetDlgItemText(hDlg,IDC_LOOP_COUNT,buf);
if (loop_forever)
CheckDlgButton(hDlg,IDC_LOOP_FOREVER,BST_CHECKED);
else if (ignore_loop)
CheckDlgButton(hDlg,IDC_IGNORE_LOOP,BST_CHECKED);
else
CheckDlgButton(hDlg,IDC_LOOP_NORMALLY,BST_CHECKED);
break;
case WM_COMMAND:
switch (GET_WM_COMMAND_ID(wParam, lParam)) {
case IDOK:
{
double temp_fade_seconds;
double temp_fade_delay_seconds;
double temp_loop_count;
int consumed;
/* read and verify */
GetDlgItemText(hDlg,IDC_FADE_SECONDS,buf,sizeof(buf));
if (sscanf(buf,"%lf%n",&temp_fade_seconds,&consumed)<1
|| consumed!=strlen(buf) ||
temp_fade_seconds<0) {
MessageBox(hDlg,
"Invalid value for Fade Length\n"
"Must be a number greater than or equal to zero",
"Error",MB_OK|MB_ICONERROR);
break;
}
GetDlgItemText(hDlg,IDC_FADE_DELAY_SECONDS,buf,sizeof(buf));
if (sscanf(buf,"%lf%n",&temp_fade_delay_seconds,
&consumed)<1 || consumed!=strlen(buf)) {
MessageBox(hDlg,
"Invalid valid for Fade Delay\n"
"Must be a number",
"Error",MB_OK|MB_ICONERROR);
break;
}
GetDlgItemText(hDlg,IDC_LOOP_COUNT,buf,sizeof(buf));
if (sscanf(buf,"%lf%n",&temp_loop_count,&consumed)<1 ||
consumed!=strlen(buf) ||
temp_loop_count<0) {
MessageBox(hDlg,
"Invalid value for Loop Count\n"
"Must be a number greater than or equal to zero",
"Error",MB_OK|MB_ICONERROR);
break;
}
GetINIFileName(iniFile);
thread_priority=mypri;
sprintf(buf,"%d",thread_priority);
WritePrivateProfileString(APP_NAME,THREAD_PRIORITY_INI_ENTRY,buf,iniFile);
fade_seconds = temp_fade_seconds;
sprintf(buf,"%.2lf",fade_seconds);
WritePrivateProfileString(APP_NAME,FADE_SECONDS_INI_ENTRY,buf,iniFile);
fade_delay_seconds = temp_fade_delay_seconds;
sprintf(buf,"%.2lf",fade_delay_seconds);
WritePrivateProfileString(APP_NAME,FADE_DELAY_SECONDS_INI_ENTRY,buf,iniFile);
loop_count = temp_loop_count;
sprintf(buf,"%.2lf",loop_count);
WritePrivateProfileString(APP_NAME,LOOP_COUNT_INI_ENTRY,buf,iniFile);
loop_forever = (IsDlgButtonChecked(hDlg,IDC_LOOP_FOREVER) == BST_CHECKED);
sprintf(buf,"%d",loop_forever);
WritePrivateProfileString(APP_NAME,LOOP_FOREVER_INI_ENTRY,buf,iniFile);
ignore_loop = (IsDlgButtonChecked(hDlg,IDC_IGNORE_LOOP) == BST_CHECKED);
sprintf(buf,"%d",ignore_loop);
WritePrivateProfileString(APP_NAME,IGNORE_LOOP_INI_ENTRY,buf,iniFile);
}
EndDialog(hDlg,TRUE);
break;
case IDCANCEL:
EndDialog(hDlg,TRUE);
break;
case IDC_DEFAULT_BUTTON:
/* set CPU Priority slider */
hSlider=GetDlgItem(hDlg,IDC_THREAD_PRIORITY_SLIDER);
SendMessage(hSlider, TBM_SETRANGE,
(WPARAM) TRUE, /* redraw flag */
(LPARAM) MAKELONG(1, 7)); /* min. & max. positions */
SendMessage(hSlider, TBM_SETPOS,
(WPARAM) TRUE, /* redraw flag */
(LPARAM) DEFAULT_THREAD_PRIORITY+1);
mypri=DEFAULT_THREAD_PRIORITY;
SetDlgItemText(hDlg,IDC_THREAD_PRIORITY_TEXT,priority_strings[mypri]);
SetDlgItemText(hDlg,IDC_FADE_SECONDS,DEFAULT_FADE_SECONDS);
SetDlgItemText(hDlg,IDC_FADE_DELAY_SECONDS,DEFAULT_FADE_DELAY_SECONDS);
SetDlgItemText(hDlg,IDC_LOOP_COUNT,DEFAULT_LOOP_COUNT);
CheckDlgButton(hDlg,IDC_LOOP_FOREVER,BST_UNCHECKED);
CheckDlgButton(hDlg,IDC_IGNORE_LOOP,BST_UNCHECKED);
CheckDlgButton(hDlg,IDC_LOOP_NORMALLY,BST_CHECKED);
break;
default:
return FALSE;
}
case WM_HSCROLL:
if ((struct HWND__ *)lParam==GetDlgItem(hDlg,IDC_THREAD_PRIORITY_SLIDER)) {
if (LOWORD(wParam)==TB_THUMBPOSITION || LOWORD(wParam)==TB_THUMBTRACK) mypri=HIWORD(wParam)-1;
else mypri=SendMessage(GetDlgItem(hDlg,IDC_THREAD_PRIORITY_SLIDER),TBM_GETPOS,0,0)-1;
SetDlgItemText(hDlg,IDC_THREAD_PRIORITY_TEXT,priority_strings[mypri]);
}
break;
default:
return FALSE;
}
return TRUE;
}
void config(HWND hwndParent) {
DialogBox(input_module.hDllInstance, (const char *)IDD_CONFIG, hwndParent, configDlgProc);
}
In_Module input_module =
{
IN_VER,
PLUGIN_DESCRIPTION,
0, /* hMainWindow */
0, /* hDllInstance */
working_extension_list,
1, /* is_seekable */
1, /* uses output */
config,
about,
init,
quit,
getfileinfo,
infoDlg,
isourfile,
play,
pause,
unpause,
ispaused,
stop,
getlength,
getoutputtime,
setoutputtime,
setvolume,
setpan,
0,0,0,0,0,0,0,0,0, // vis stuff
0,0, // dsp
eq_set,
NULL, // setinfo
0 // out_mod
};
__declspec( dllexport ) In_Module * winampGetInModule2()
{
return &input_module;
}
/**
* Creates Winamp's extension list, a single string that ends with \0\0.
* Each extension must be in this format: "extension\0Description\0"
*/
static void build_extension_list() {
const char ** ext_list;
int ext_list_len;
int i;
working_extension_list[0]='\0';
working_extension_list[1]='\0';
ext_list = vgmstream_get_formats();
ext_list_len = vgmstream_get_formats_length();
for (i=0; i < ext_list_len; i++) {
add_extension(EXTENSION_LIST_SIZE, working_extension_list, ext_list[i]);
}
}
/**
* Adds ext to Winamp's extension list.
*/
static void add_extension(int length, char * dst, const char * ext) {
char buf[EXT_BUFFER_SIZE];
char ext_upp[EXT_BUFFER_SIZE];
int ext_len, written;
int i,j;
if (length <= 1)
return;
ext_len = strlen(ext);
/* find end of dst (double \0), saved in i */
for (i=0; i<length-2 && (dst[i] || dst[i+1]); i++)
;
/* check if end reached or not enough room to add */
if (i == length-2 || i + EXT_BUFFER_SIZE+2 > length-2 || ext_len * 3 + 20+2 > EXT_BUFFER_SIZE) {
dst[i]='\0';
dst[i+1]='\0';
return;
}
if (i > 0)
i++;
/* uppercase ext */
for (j=0; j < ext_len; j++)
ext_upp[j] = toupper(ext[j]);
ext_upp[j] = '\0';
/* copy new extension + double null terminate */
written = sprintf(buf, "%s%c%s Audio File (*.%s)%c", ext,'\0',ext_upp,ext_upp,'\0'); /*ex: "vgmstream\0vgmstream Audio File (*.VGMSTREAM)\0" */
for (j=0; j < written; i++,j++)
dst[i] = buf[j];
dst[i]='\0';
dst[i+1]='\0';
}
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