OPENCL_SOURCE_NB  128 libavfilter/vf_tonemap_opencl.c     const char *opencl_sources[OPENCL_SOURCE_NB];
OPENCL_SOURCE_NB  247 libavfilter/vf_tonemap_opencl.c     err = ff_opencl_filter_load_program(avctx, opencl_sources, OPENCL_SOURCE_NB);