> 在 2025年3月25日，下午6:01，Martin Storsjö <mar...@martin.st> 写道：
>
> This error constant was only added in the macOS 12 and iOS 15
> SDKs.
>
> If building with an older SDK, assume that the error doesn't
> match this constant.
>
> This fixes build errors with older SDKs after
> c6214b0d691566c7cb0f2ff5be08a24c3534e5bb.
>
> As this constant is declared unconditionally (without any target
> version guards) in the headers, one can't reproduce this issue
> while building with a newer SDK and targeting an older version
> with -mmacosx-version-min=.
>
> Technically, checking just one of MAC_OS_VERSION_12_0 and
> __IPHONE_15_0 is enough; the macOS SDKs and iOS SDKs share these
> files, so files from a similar point in time do have the same
> defines. Therefore, we don't really need to expand this with
> checks for tvOS, watchOS and other OS variants.
> ---
> libavcodec/videotoolbox.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/libavcodec/videotoolbox.c b/libavcodec/videotoolbox.c
> index aaa6129576..7f7b910b26 100644
> --- a/libavcodec/videotoolbox.c
> +++ b/libavcodec/videotoolbox.c
> @@ -728,8 +728,13 @@ static void videotoolbox_decoder_callback(void *opaque,
> }
>
> if (!image_buffer) {
> +#if defined(MAC_OS_VERSION_12_0) || defined(__IPHONE_15_0)
> + // kVTVideoDecoderReferenceMissingErr was defined in the macOS
> 12/iOS 15 SDK
> if (status != kVTVideoDecoderReferenceMissingErr)
> vtctx->reconfig_needed = true;
> +#else
> + vtctx->reconfig_needed = true;
> +#endif
I used its numeric value initially, but after checking the doc,
kVTVideoDecoderReferenceMissingErr
iOS 6.0+
iPadOS 6.0+
Mac Catalyst 13.0+
macOS 10.8+
tvOS 10.2+
visionOS 1.0+
I replaced it with the enum.
Now I wondering what does this macOS 10.8 mean.
Anyway, can we use the numeric value here?
>
> av_log(vtctx->logctx, status ? AV_LOG_WARNING : AV_LOG_DEBUG,
> "vt decoder cb: output image buffer is null: %i, reconfig
> %d\n",
> --
> 2.39.5 (Apple Git-154)
>
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