On Mon, 27 Mar 2017 21:38:10 +0100
Mark Thompson <[email protected]> wrote:
> ---
> For naughty people only - this won't be set by default anywhere.
>
>
> doc/APIchanges | 3 +++
> libavcodec/avcodec.h | 14 ++++++++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/doc/APIchanges b/doc/APIchanges
> index a0ca3b7ac..5da821c90 100644
> --- a/doc/APIchanges
> +++ b/doc/APIchanges
> @@ -13,6 +13,9 @@ libavutil: 2017-03-23
>
> API changes, most recent first:
>
> +2017-04-xx - xxxxxxx - lavc 58.x.y+1 - avcodec.h
> + Add AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH.
> +
> 2017-03-xx - xxxxxxx - lavc 57.37.0 - avcodec.h
> Add AVCodecContext.hwaccel_flags field. This will control some hwaccels at
> a later point.
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 1c58fe2d6..2aa70ca4f 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -3004,6 +3004,20 @@ typedef struct AVHWAccel {
> #define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1)
>
> /**
> + * Hardware acceleration should still be attempted for decoding when the
> + * codec profile does not match the reported capabilities of the hardware.
> + *
> + * For example, this can be used to try to decode baseline profile H.264
> + * streams in hardware - it will often succeed, because many streams marked
> + * as baseline profile actually conform to constrained baseline profile.
> + *
> + * @warning If the stream is actually not supported then the behaviour is
> + * undefined, and may include returning entirely incorrect output
> + * while indicating success.
> + */
> +#define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2)
> +
> +/**
> * @}
> */
>
What are the exact semantics of this? I assume it's something like
picking the highest profile if the exact profile is not available.
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