25 lines
934 B
Plaintext
25 lines
934 B
Plaintext
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DEBUGGING AND TRACING
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The VDPAU wrapper library supports tracing VDPAU function calls, and their
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parameters. This tracing is controlled by the following environment variables:
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VDPAU_TRACE
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Enables tracing. Set to 1 to trace function calls. Set to 2 to trace all
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arguments passed to the function.
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VDPAU_TRACE_FILE
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Filename to write traces to. By default, traces are sent to stderr. This
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variable may either contain a plain filename, or a reference to an
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existing open file-descriptor in the format "&N" where N is the file
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descriptor number.
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The VDPAU wrapper library is responsible for determining which vendor-specific
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driver to load for a given X11 display/screen. At present, it hard-codes
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"nvidia" as the driver. The environment variable VDPAU_DRIVER may be set to
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override this default. The actual library loaded will be
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libvdpau_${VDPAU_DRIVER}.so. Setting VDPAU_DRIVER to "trace" is not advised.
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