[vlmc-devel] [PATCH] MLTBackend: Add MLT service info in logHandler

[yikei lu]

2016-07-29 22:59 GMT+09:00 Pawel Golinski <golpaw1 at gmail.com>:
> ---
>  src/Backend/MLT/MLTBackend.cpp | 28 ++++++++++++++++++++++++++--
>  1 file changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/src/Backend/MLT/MLTBackend.cpp b/src/Backend/MLT/MLTBackend.cpp
> index 3d39930..5af85c2 100644
> --- a/src/Backend/MLT/MLTBackend.cpp
> +++ b/src/Backend/MLT/MLTBackend.cpp
> @@ -28,6 +28,7 @@
>  #include <mlt++/MltRepository.h>
>
>  #include <mlt/framework/mlt_log.h>
> +#include <mlt/framework/mlt_service.h>
>
>  #include "MLTFilter.h"
>
> @@ -101,8 +102,22 @@ void
>  MLTBackend::setLogHandler( IBackend::LogHandler logHandler )
>  {
>      staticLogHandler = logHandler;
> -    mlt_log_set_callback( []( void*, int level, const char* format, va_list vl )
> +    mlt_log_set_callback( []( void* ptr, int level, const char* format, va_list vl )
>      {
> +        char* prefix_buffer = nullptr;
> +
> +        Mlt::Properties properties( mlt_service_properties( ( mlt_service )ptr ) );
> +
> +        if ( properties.is_valid() )
> +        {
> +            char *mlt_type = properties.get( "mlt_type" );
> +            char *mlt_service = properties.get( "mlt_service" );
> +            if ( mlt_service )
> +                asprintf( &prefix_buffer, "[%s %s] ", mlt_type, mlt_service );
> +            else
> +                asprintf( &prefix_buffer, "[%s %p] ", mlt_type, ptr );
> +        }
> +
>          char* buffer = nullptr;
>
>          auto lvl = IBackend::None;
> @@ -118,7 +133,16 @@ MLTBackend::setLogHandler( IBackend::LogHandler logHandler )
>          if ( vasprintf( &buffer, format, vl ) < 0 )
>              return;
>
> -        staticLogHandler( lvl, buffer );
> +        std::string prefix_buffer_str;
> +        std::string buffer_str;
> +        if ( prefix_buffer )
> +            prefix_buffer_str = prefix_buffer;
> +        if ( buffer )
> +            buffer_str = buffer;
> +        std::string msg_str = prefix_buffer_str + buffer_str;

Looks good to me! Though we could do like this
std::string msg_ptr;
if ( prefix_buffer )
    msg_ptr += prefix_buffer;
if ( buffer )
    msg_ptr += buffer;

> +
> +        staticLogHandler( lvl, msg_str.c_str() );
> +        free( prefix_buffer );
>          free( buffer );
>      } );
>  }
> --
> 2.7.4 (Apple Git-66)
>
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