movies: fix for loading unseekable Opus files

Same fix as 00b3fbdb1ab9b9dce6ca8a88287563a7be687c9d but for Opus files.
This commit is contained in:
rdb 2019-04-29 11:41:13 +02:00
parent 2c55663472
commit fa1ff3d489

View File

@ -56,6 +56,22 @@ int cb_seek(void *stream, opus_int64 offset, int whence) {
break;
case SEEK_CUR:
// opusfile uses a seek with offset 0 to determine whether seeking is
// supported, but this is not good enough. We seek to the end and back.
if (offset == 0) {
std::streambuf *buf = in->rdbuf();
std::streampos pos = buf->pubseekoff(0, std::ios::cur, std::ios::in);
if (pos < 0) {
return -1;
}
if (buf->pubseekoff(0, std::ios::end, std::ios::in) >= 0) {
// It worked; seek back to the previous location.
buf->pubseekpos(pos, std::ios::in);
return 0;
} else {
return -1;
}
}
in->seekg(offset, std::ios::cur);
break;