philipel 31718d7ce2 Reland "Add option to disable quality scaling for AV1."
This reverts commit 83102d39077f82f2d4539c160c659dcf789a5fdb.

Reason for revert: reland with fix

Original change's description:
> Revert "Add option to disable quality scaling for AV1."
>
> This reverts commit 446dbc66fde7e9d5e684d3f71e357c2076a91740.
>
> Reason for revert: downstream break
>
> Original change's description:
> > Add option to disable quality scaling for AV1.
> >
> > The main goal of this change is to disable the quality scaler when multiple spatial layers are used.
> >
> > Bug: b/295129711
> > Change-Id: I25e0b7440a8c2adee3e97720a1e0ee5e0a914334
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/319181
> > Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
> > Reviewed-by: Erik Språng <sprang@webrtc.org>
> > Commit-Queue: Philip Eliasson <philipel@webrtc.org>
> > Cr-Commit-Position: refs/heads/main@{#40709}
>
> Bug: b/295129711
> Change-Id: Iaeb13951d1b839bc0426120436035843bb3ee98f
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/320081
> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
> Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Philip Eliasson <philipel@webrtc.org>
> Owners-Override: Philip Eliasson <philipel@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#40742}

Bug: b/295129711
Change-Id: Iab4846c2cd6074f50a3ebe9551432d449243b5d7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/320120
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40743}
2023-09-13 15:19:36 +00:00
..
2023-02-24 11:48:39 +00:00
2023-03-27 17:06:33 +00:00
2023-09-07 10:41:49 +00:00

How to write code in the api/ directory

Mostly, just follow the regular style guide, but:

  • Note that api/ code is not exempt from the “.h and .cc files come in pairs” rule, so if you declare something in api/path/to/foo.h, it should be defined in api/path/to/foo.cc.
  • Headers in api/ should, if possible, not #include headers outside api/. Its not always possible to avoid this, but be aware that it adds to a small mountain of technical debt that were trying to shrink.
  • .cc files in api/, on the other hand, are free to #include headers outside api/.
  • Avoid structs in api, prefer classes.

The preferred way for api/ code to access non-api/ code is to call it from a .cc file, so that users of our API headers wont transitively #include non-public headers.

For headers in api/ that need to refer to non-public types, forward declarations are often a lesser evil than including non-public header files. The usual rules still apply, though.

.cc files in api/ should preferably be kept reasonably small. If a substantial implementation is needed, consider putting it with our non-public code, and just call it from the api/ .cc file.

Avoid defining api with structs as it makes harder for the api to evolve. Your struct may gain invariant, or change how it represents data. Evolving struct from the api is particular challenging as it is designed to be used in other code bases and thus needs to be updated independetly from its usage. Class with accessors and setters makes such migration safer. See Google C++ style guide for more.

If you need to evolve existent struct in api, prefer first to convert it into a class.