[FFmpeg-devel] [PATCH] hwcontext: add av_hwdevice_ctx_create_derived2

[Lynne]

May 11, 2020, 13:55 by jamrial at gmail.com:

> On 5/11/2020 7:25 AM, Lynne wrote:
>
>> This allows for users who derive devices to set options for the 
>> new device context they derive.
>> The main use case of this is to allow users to enable extensions
>> (such as surface drawing extensions) in Vulkan while deriving from
>> the device their frames are on. That way, users don't need to write
>> any initialization code themselves, since currently Vulkan prevents
>> mixing instances and devices.
>> Also, with this, users can also set custom OpenCL extensions such
>> as cl_khr_gl_sharing and cl_khr_gl_depth_images.
>> Apart from OpenCL and Vulkan, other hwcontexts ignore the opts
>> argument since they don't support options at all (or in VAAPI's case,
>> options are only used for device selection, which device_derive overrides).
>>
>> Patch attached.
>>
>
> Could this be av_hwdevice_ctx_create_derived_dict() or similar, please?
> The 2 suffix is pretty ugly and it would be nice if we can avoid adding
> more of them.
>

Sure, changed locally to av_hwdevice_ctx_create_derived_opts.