[Libav-user] Building with MSVC toolchain resulting in seeking problem?

[Hendrik Leppkes]

On Tue, Mar 12, 2013 at 4:10 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> John Orr <john.orr at ...> writes:
>
>>      if (whence == AVSEEK_SIZE) {
>> #ifndef _MSC_VER
>>          struct stat st;
>>
>>          ret = fstat(c->fd, &st);
>> #else
>>          struct _stat64 st;
>>          ret = _fstati64( c->fd, &st );
>> #endif
>>          return ret < 0 ? AVERROR(errno) : (S_ISFIFO(st.st_mode) ? 0 :
>> st.st_size);
>>      }
>> #ifndef _MSC_VER
>>      ret = lseek(c->fd, pos, whence);
>> #else
>>      ret = _lseeki64(c->fd, pos, whence);
>> #endif
>
> Perhaps you could (fix the whitespace and) send a patch
> to ffmpeg-devel or set up a git clone to allow merging?
>

If you send a patch, then first look at libavformat/os_support.h, it
already has defines for mingw to map these functions, and should
probably be enhanced there, instead of cluttering file.c with #ifdefs.