[FFmpeg-devel] Add Mediacodec audio decoders support

[Zhao Zhili]

> On Jul 16, 2024, at 21:20, Matthieu Bouron <matthieu.bouron at gmail.com> wrote:
> 
> On Wed, Jul 10, 2024 at 6:31 PM Matthieu Bouron
> <matthieu.bouron at gmail.com> wrote:
>> 
>> On Wed, Jul 10, 2024 at 4:04 PM Zhao Zhili <quinkblack at foxmail.com> wrote:
>>> 
>>> 
>>>> On Jun 12, 2024, at 21:42, Matthieu Bouron <matthieu.bouron at gmail.com> wrote:
>>>> 
>>>> Hello,
>>>> 
>>>> This patchset adds Mediacodec audio decoders support. Currently, only AAC, AMR,
>>>> MP3, FLAC, VORBIS and OPUS are supported.
>>>> 
>>>> This is mainly useful to avoid shipping Android builds of FFmpeg that are
>>>> subjects to licensing/patents (due to AAC and AMR).
>>> 
>>> I’m not keen on put OS audio decoder/encoder wrapper into FFmpeg. They don’t bring
>>> new features, they don’t improve performance. I know these type of wrapper exist in current
>>> project, but I’m not sure if it’s a good idea to add more.
>> 
>> I agree that on the technical side it doesn't bring new features nor
>> performance improvements. It's all about avoiding licensing/patents
>> issues with AAC and AMR here.
>> In this specific case we already have the wrapper infrastructure, the
>> audio part only needs small adjustments to work.
>> Moreover, if that helps, I can reduce the scope of the patch to AAC
>> and AMR only and get rid of mp3/flac/vorbis/opus support. What do you
>> think ?
> 
> Ping.
> 
> IMHO, this benefits users wanting to ship an Android app that relies
> on FFmpeg upstream in countries that are subject to AAC/AMR licensing.
> While I agree that it's not great from a purely technical pov since we
> already have better native decoders, it will allow the use of FFmpeg
> in such situation without the need to use or create another FFmpeg
> fork dedicated to Android. Plus, as I said above, we already have the
> wrapper and the additional code to make it work for audio is
> relatively small and scoped. Restricting the wrapper to AAC/AMR seems
> like a good compromise to me.

Sounds reasonable, but I’d like to get more opinions. cc TC.

> 
> [...]
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