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From: Nicolas George <george@nsup.org>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH v2 5/6] libavutil: Add AVMap
Date: Tue, 15 Apr 2025 21:14:42 +0200
Message-ID: <Z_6wIk52_3NeQBlv@phare.normalesup.org> (raw)
In-Reply-To: <20250415190631.GS4991@pb2>

Michael Niedermayer (HE12025-04-15):
> Where exactly would that benefit FFmpeg ?
> Dictionaries generally are used to move stuff aorund, like metadata or
> options.
> Or may be used in the future to keep track of some mappings like
> timestamps to file positions during demuxing or muxing
> Or maybe codecs/formats lookup from name
> None of these are confined to a single local function

	AVMap opts = av_map_create(cmp, NULL, NULL);
	av_map_add(opts, "threads", "12");
	av_map_add(opts, "crf", "18");
	av_map_add(opts, "preset", "veryslow");
	av_map_assert_small(opts);
	ret = av_codec_open3(ctx, codec, opts);

> i like av_map_new() because "new" is short

The exact name does not matter to me. I forgot that we usually use
_alloc() for the case you implemented, so _new() is absolutely fine for
this.

av_map_assert_small() should assert that no dynamic allocation happened,
and at assert level 2 that the internal buffer is less than halfway full.

> and sizeof(AVMap) is not public API

It should be public API like I did for BPrint, that is my point.

Regards,

-- 
  Nicolas George
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  reply	other threads:[~2025-04-15 19:14 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-15 18:14 [FFmpeg-devel] [PATCH v2 1/6] avutil/tree: av_tree_find2() to also find the first and last elements comparing equal Michael Niedermayer
2025-04-15 18:14 ` [FFmpeg-devel] [PATCH v2 2/6] avutil/tree: Add av_tree_move Michael Niedermayer
2025-04-15 18:14 ` [FFmpeg-devel] [PATCH v2 3/6] avutil/tree: Make av_tree_find2() non recursive Michael Niedermayer
2025-04-15 18:14 ` [FFmpeg-devel] [PATCH v2 4/6] avutil/tree: Make tree_find_next() " Michael Niedermayer
2025-04-15 18:14 ` [FFmpeg-devel] [PATCH v2 5/6] libavutil: Add AVMap Michael Niedermayer
2025-04-15 18:45   ` Nicolas George
2025-04-15 19:06     ` Michael Niedermayer
2025-04-15 19:14       ` Nicolas George [this message]
2025-04-15 21:11         ` Michael Niedermayer
2025-04-15 21:24           ` Nicolas George
2025-04-15 18:14 ` [FFmpeg-devel] [PATCH v2 6/6] [NOT for git] avutil/tests/map: benchmark code Michael Niedermayer

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