int output_height;
} OpenCLFilterContext;
+
+/**
+ * set argument to specific Kernel.
+ * This macro relies on usage of local label "fail" and variables:
+ * avctx, cle and err.
+ */
+#define CL_SET_KERNEL_ARG(kernel, arg_num, type, arg) \
+ cle = clSetKernelArg(kernel, arg_num, sizeof(type), arg); \
+ if (cle != CL_SUCCESS) { \
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel " \
+ "argument %d: error %d.\n", arg_num, cle); \
+ err = AVERROR(EIO); \
+ goto fail; \
+ }
+
+/**
+ * A helper macro to handle OpenCL errors. It will assign errcode to
+ * variable err, log error msg, and jump to fail label on error.
+ */
+#define CL_FAIL_ON_ERROR(errcode, ...) do { \
+ if (cle != CL_SUCCESS) { \
+ av_log(avctx, AV_LOG_ERROR, __VA_ARGS__); \
+ err = errcode; \
+ goto fail; \
+ } \
+ } while(0)
+
/**
* Return that all inputs and outputs support only AV_PIX_FMT_OPENCL.
*/