* [FFmpeg-devel] Can a GetByteContext have a "sub" context?
@ 2025-09-02 6:03 Manuel Lauss via ffmpeg-devel
2025-09-02 7:57 ` [FFmpeg-devel] " Peter Ross via ffmpeg-devel
0 siblings, 1 reply; 2+ messages in thread
From: Manuel Lauss via ffmpeg-devel @ 2025-09-02 6:03 UTC (permalink / raw)
To: FFmpeg development discussions and patches; +Cc: Manuel Lauss
Hello,
Is it possible to have a "sub" context with a limited byte range for a
super-context?
i.e. I read 4 bytes from context c1, these are a length, c2 =
GetByteContext_from(c1, len) ? Or is "GetByteContext(&c2, c1.buffer,
len);" enough?
Thanks!
Manuel
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^ permalink raw reply [flat|nested] 2+ messages in thread* [FFmpeg-devel] Re: Can a GetByteContext have a "sub" context?
2025-09-02 6:03 [FFmpeg-devel] Can a GetByteContext have a "sub" context? Manuel Lauss via ffmpeg-devel
@ 2025-09-02 7:57 ` Peter Ross via ffmpeg-devel
0 siblings, 0 replies; 2+ messages in thread
From: Peter Ross via ffmpeg-devel @ 2025-09-02 7:57 UTC (permalink / raw)
To: FFmpeg development discussions and patches; +Cc: Peter Ross
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On Tue, Sep 02, 2025 at 08:03:14AM +0200, Manuel Lauss via ffmpeg-devel wrote:
> Hello,
>
> Is it possible to have a "sub" context with a limited byte range for a
> super-context?
> i.e. I read 4 bytes from context c1, these are a length, c2 =
> GetByteContext_from(c1, len) ? Or is "GetByteContext(&c2, c1.buffer,
> len);" enough?
second one is what I do:
bytestream2_init(&c2, c1.buffer, len)
also need to check that that len does not exceed c1 bytes remaining. use bytestream2_get_bytes_left(c1).
-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-09-02 6:03 [FFmpeg-devel] Can a GetByteContext have a "sub" context? Manuel Lauss via ffmpeg-devel
2025-09-02 7:57 ` [FFmpeg-devel] " Peter Ross via ffmpeg-devel
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