Re: [FFmpeg-devel] [PATCH 4/4 v2] avcodec/h264dec: add support for LCEVC enhancement

[James Almer <jamrial@gmail.com>]

On 7/26/2024 9:19 AM, Anton Khirnov wrote:
> Quoting James Almer (2024-07-26 14:10:46)
>> On 7/26/2024 4:55 AM, Anton Khirnov wrote:
>>> Quoting James Almer (2024-07-22 00:53:50)
>>>> Signed-off-by: James Almer <jamrial@gmail.com>
>>>> ---
>>>>    configure                 |  2 +-
>>>>    libavcodec/avcodec.h      |  5 +++++
>>>>    libavcodec/h264_picture.c |  1 +
>>>>    libavcodec/h264_slice.c   | 15 ++++++++++++++
>>>>    libavcodec/h264dec.c      | 41 ++++++++++++++++++++++++++++++++++++---
>>>>    libavcodec/h264dec.h      |  3 +++
>>>>    6 files changed, 63 insertions(+), 4 deletions(-)
>>>
>>> Does this need to be integrated into individual decoders? Can't the
>>> generic path apply it based on the presence of AV_FRAME_DATA_LCEVC sdide
>>> data and AV_CODEC_EXPORT_DATA_ENHANCEMENTS being set?
>>
>> Individual decoders still need to be aware of lcevc metadata being
>> present to do things like allocating the output frame, because afaik i
>> can't call get_buffer2() from the main/user thread. So is it worth
>> moving things to the generic code when DR1 decoders will still need
>> extra considerations?
> 
> Can it not be handled in ff_get_buffer()? And even if not - there'd
> still be a lot less code that needs to be duplicated across every
> decoder supporting this.

I'll try that.
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