[FFmpeg-devel] [PATCH] fix MSVC compilation errors

[Hendrik Leppkes]

On Tue, Dec 5, 2017 at 3:20 PM, James Almer <jamrial at gmail.com> wrote:
> On 12/4/2017 8:31 PM, Mateusz wrote:
>> After some tests:
>> 1) #undef far
>> after #include <windows.h> is wrong -- in oleauto.h is declaration
>> WINOLEAUTAPI VarUI1FromI8(LONG64 i64In, _Out_ BYTE FAR* pbOut);
>> and 'FAR' is defined as 'far' which is define as empty.
>>
>> 2) #undef near
>> after #include <windows.h> works in ffmpeg but is danger -- see 1)
>>
>> 3) after
>> git revert 3701d499f8734ec5f3e7359de7311b15d92070b0
>> git revert 590136e78da3d091ea99ab5432543d47a559a461
>> and patch
>> diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
>> -    MXFPackage packages[2] = {};
>> +    MXFPackage packages[2] = {{NULL}};
>> VS 2017 can compile ffmpeg and fate stops at audiomatch-nero-16000-mono-he-m4a
>> (without reverting 590136e hangs at api-flac-test.exe)
>>
>> 4) if for any reasons commits 3701d49 and 590136e shouldn't be reverted,
>> we can apply this patch and
>> diff --git a/libavcodec/utils.c b/libavcodec/utils.c
>> index baf09119fe..b34a3803b8 100644
>> --- a/libavcodec/utils.c
>> +++ b/libavcodec/utils.c
>> @@ -1943,7 +1943,7 @@ int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
>>
>>  int ff_lock_avcodec(AVCodecContext *log_ctx, const AVCodec *codec)
>>  {
>> -    _Bool exp = 0;
>> +    atomic_bool exp = 0;
>>      if (codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE || !codec->init)
>>          return 0;
>>
>> @@ -1969,7 +1969,7 @@ int ff_lock_avcodec(AVCodecContext *log_ctx, const AVCodec *codec)
>>
>>  int ff_unlock_avcodec(const AVCodec *codec)
>>  {
>> -    _Bool exp = 1;
>> +    atomic_bool exp = 1;
>
> No, these are not meant to be atomic.
>

int will also not work, since you would pass a pointer to an int to
something that expects a pointer to intptr_t.

- Hendrik