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2022-07-26 Fred Gleason <fredg@paravelsystems.com>

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* Modified 'RDWaveFile' to work around known fencepost errors in
	WAV files generated by "Sonic Studio soundBlade" by
	"PME Mastering, Inc."

Signed-off-by: Fred Gleason <fredg@paravelsystems.com>
This commit is contained in:
Fred Gleason 2022-07-26 16:07:23 -04:00
parent c57ab9091a
commit 31baca9133
2 changed files with 26 additions and 6 deletions
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4
ChangeLog
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@ -16726,3 +16726,7 @@
* Incremented the package version to 2.19.2int08.
2018-10-31 Fred Gleason <fredg@paravelsystems.com>
* Incremented the package version to 2.19.3.
2022-07-26 Fred Gleason <fredg@paravelsystems.com>
* Modified 'RDWaveFile' to work around known fencepost errors in
WAV files generated by "Sonic Studio soundBlade" by
"PME Mastering, Inc."

28
lib/rdwavefile.cpp
View File

@ -2394,13 +2394,19 @@ bool RDWaveFile::IsM4A(int fd)
off_t RDWaveFile::FindChunk(int fd,const char *chunk_name,unsigned *chunk_size,
bool big_end)
{
int i;
int offset;
char name[5]={0,0,0,0,0};
unsigned char buffer[4];
lseek(fd,12,SEEK_SET);
i=read(fd,name,4);
i=read(fd,buffer,4);
offset=read(fd,name,4);
if(!isalnum(0xff&name[0])) {
name[0]=name[1];
name[1]=name[2];
name[2]=name[3];
offset=read(fd,name+3,1);
}
offset=read(fd,buffer,4);
if(big_end) {
*chunk_size=
buffer[3]+(256*buffer[2])+(65536*buffer[1])+(16777216*buffer[0]);
@ -2409,13 +2415,23 @@ off_t RDWaveFile::FindChunk(int fd,const char *chunk_name,unsigned *chunk_size,
*chunk_size=
buffer[0]+(256*buffer[1])+(65536*buffer[2])+(16777216*buffer[3]);
}
while(i==4) {
while(offset==4) {
if(strcasecmp(chunk_name,name)==0) {
return lseek(fd,0,SEEK_CUR);
}
lseek(fd,*chunk_size,SEEK_CUR);
i=read(fd,name,4);
i=read(fd,buffer,4);
offset=read(fd,name,4);
//
// Attempt to work around known fencepost errors in WAV files generated by
// "Sonic Studio soundBlade" by "PME Mastering, Inc." (and perhaps others?)
//
if(!isalnum(0xff&name[0])) {
name[0]=name[1];
name[1]=name[2];
name[2]=name[3];
offset=read(fd,name+3,1);
}
offset=read(fd,buffer,4);
if(big_end) {
*chunk_size=buffer[3]+(256*buffer[2])+(65536*buffer[1])+
(16777216*buffer[0]);