furnace/src/engine/sfWrapper.cpp

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2022 tildearrow and contributors
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "sfWrapper.h"
#include "../fileutils.h"
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#include "sndfile.h"
sf_count_t _vioGetSize(void* user) {
return ((SFWrapper*)user)->ioGetSize();
}
sf_count_t _vioSeek(sf_count_t offset, int whence, void* user) {
return ((SFWrapper*)user)->ioSeek(offset,whence);
}
sf_count_t _vioRead(void* ptr, sf_count_t count, void* user) {
return ((SFWrapper*)user)->ioRead(ptr,count);
}
sf_count_t _vioWrite(const void* ptr, sf_count_t count, void* user) {
return ((SFWrapper*)user)->ioWrite(ptr,count);
}
sf_count_t _vioTell(void* user) {
return ((SFWrapper*)user)->ioTell();
}
sf_count_t SFWrapper::ioGetSize() {
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sf_count_t ret=(sf_count_t)len;
if (fileMode==SFM_WRITE || fileMode==SFM_RDWR) {
ssize_t lastTell=ftell(f);
fseek(f,0,SEEK_END);
ret=(sf_count_t)ftell(f);
fseek(f,lastTell,SEEK_SET);
}
return ret;
}
sf_count_t SFWrapper::ioSeek(sf_count_t offset, int whence) {
return fseek(f,offset,whence);
}
sf_count_t SFWrapper::ioRead(void* ptr, sf_count_t count) {
return fread(ptr,1,count,f);
}
sf_count_t SFWrapper::ioWrite(const void* ptr, sf_count_t count) {
return fwrite(ptr,1,count,f);
}
sf_count_t SFWrapper::ioTell() {
return ftell(f);
}
int SFWrapper::doClose() {
int ret=sf_close(sf);
fclose(f);
return ret;
}
SNDFILE* SFWrapper::doOpen(const char* path, int mode, SF_INFO* sfinfo) {
vio.get_filelen=_vioGetSize;
vio.read=_vioRead;
vio.seek=_vioSeek;
vio.tell=_vioTell;
vio.write=_vioWrite;
const char* modeC="rb";
if (mode==SFM_WRITE) {
modeC="wb";
}
if (mode==SFM_RDWR) {
modeC="rb+";
}
f=ps_fopen(path,modeC);
if (f==NULL) {
return NULL;
}
if (fseek(f,0,SEEK_END)==-1) {
fclose(f);
f=NULL;
return NULL;
}
len=ftell(f);
if (len==(SIZE_MAX>>1)) {
len=0;
fclose(f);
f=NULL;
return NULL;
}
if (fseek(f,0,SEEK_SET)==-1) {
len=0;
fclose(f);
f=NULL;
return NULL;
}
sf=sf_open_virtual(&vio,mode,sfinfo,this);
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if (sf!=NULL) fileMode=mode;
return sf;
}