> -----Original Message----- > From: [email protected] [mailto:ffmpeg-devel- > [email protected]] On Behalf Of James Almer > Sent: Thursday, May 28, 2015 10:06 AM > To: FFmpeg development discussions and patches > Subject: Re: [FFmpeg-devel] [PATCH] configure: autodetect OpenCL headers > and ICD loader > > On 28/05/15 12:28 AM, Gupta, Maneesh wrote: > > Attached is a patch that enables configure to autodetect the presence of > OpenCL headers and ICD loader. If the necessary headers are found, the > OpenCL infrastructure compilation is enabled as well. Note that this does not > modify the runtime behavior in any way. Execution of the OpenCL code path > still requires the user to explicitly enable it. > > > > Please review the patch and share your comments on the same. > > > > - Maneesh > > I personally don't agree OpenCL should be autodetected. > > Currently, only the so called "system" libs are autodetected (zlib, iconv, > pthreads, the like). Open*L, decoding/encoding libraries, and other > miscellaneous libraries are enabled only if explicitly requested. > If we enable one by default, then there's no argument against enabling > every other as well ("Why this one but not that other one?"), and suddenly > default builds become bloated and automated scripts get potentially broken > until adapted. > > Lets keep default builds as lightweight as possible, and allow people to > explicitly enable the functionality they require.
[Gupta, Maneesh] Apologize for the delayed response. However grep'ing the string "autodetect" in the configure script throws up several "non-system" libs including D3D11VA, DXVA2, VAAPI, VDA, VDPAU, sdl. Why are they turned on by default? Several of these non-system libs enable use of hardware acceleration. OpenCL is similar in nature with a key difference that it is more platform/OS agnostic and can run on both CPU as well as GPU. _______________________________________________ ffmpeg-devel mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
