[FFmpeg-devel] new logging functionality
michaelni at gmx.at
Fri Jun 29 20:21:53 CEST 2012
On Fri, Jun 29, 2012 at 01:47:34PM -0400, Martin Carroll wrote:
> In the process of trying to understand the implementation of
> ffplay/ffmpeg, I found it necessary to implement some new
> logging-related functions. These functions make it easier to
> understand (e.g.) the dynamic call graph of a multi-threaded
> program. I believe that these functions might be appreciated
> by other ffmpeg developers; if so, I would be happy to send the
> patch upstream (or discuss further).
> Here, in more detail, is the new functionality:
> 1. Forced log messages
> The new function av_flog() forces the log message to come
> out, regardless of the current log-level setting. To enable
> this feature, the variable do_flog in libavutil/log.c must
> be set to 1.
why dont you just use a log level that is sufficiently high ?
> 2. Thread-id logging
> To make it easier to see which thread is doing what, the
> logger can now be configured to prefix all log messages
> with either the numeric id or the name of the calling
> thread. (The name is printed if the thread was previously
> registered with av_log_set_threadname().) To enable this
> feature, the variable print_threadid in libavutil/log.c
> must be set to 1.
> 3. Indentation for dynamic call graph
> To make it easier to view the program's dynamic call graph,
> the logger can now be configured to push and pop indentation
> levels on the log messages. The new macros LOGPUSH and
> LOGPOP respectively increase and decrease the current
> indentation level and also print information about the
> name and file location of the function that is being
> entered or returned from. To enable this feature, the
> variable do_pushpop in libavutil/log.c must be set to 1.
these 2 sound interresting
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
What does censorship reveal? It reveals fear. -- Julian Assange
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