Adding in NewContextWithStrategy for go binding

Adding in NewContextWithStrategy, a function to allow you to specify the
strategy when initializing the context. NewContext will use this
"helper" function so that users don't need to think about what strategy
they're specifying by default. I'm also doing it this way (instead of a
function that sets the strategy) because the basis of what parameters we
populate the context with is determined by the strategy we are using, so
it needs to be done in the beginning of creating the context.

Author: aderbedr-lw

bindings/go/pkg/whisper/interface.go

@@ -27,6 +27,7 @@ type Model interface {
 
 	// Return a new speech-to-text context.
 	NewContext() (Context, error)
+	NewContextWithStrategy(SamplingStrategy) (Context, error)
 
 	// Return true if the model is multilingual.
 	IsMultilingual() bool

bindings/go/pkg/whisper/model.go

@@ -20,6 +20,13 @@ type model struct {
 // Make sure model adheres to the interface
 var _ Model = (*model)(nil)
 
+type SamplingStrategy whisper.SamplingStrategy
+
+const (
+	SAMPLING_GREEDY      SamplingStrategy = (SamplingStrategy)(whisper.SAMPLING_GREEDY)
+	SAMPLING_BEAM_SEARCH SamplingStrategy = (SamplingStrategy)(whisper.SAMPLING_BEAM_SEARCH)
+)
+
 ///////////////////////////////////////////////////////////////////////////////
 // LIFECYCLE
 
@@ -82,12 +89,17 @@ func (model *model) Languages() []string {
 }
 
 func (model *model) NewContext() (Context, error) {
+	// By default, specify the greedy strategy
+	return model.NewContextWithStrategy(SAMPLING_GREEDY)
+}
+
+func (model *model) NewContextWithStrategy(strategy SamplingStrategy) (Context, error) {
 	if model.ctx == nil {
 		return nil, ErrInternalAppError
 	}
 
 	// Create new context
-	params := model.ctx.Whisper_full_default_params(whisper.SAMPLING_GREEDY)
+	params := model.ctx.Whisper_full_default_params((whisper.SamplingStrategy)(strategy))
 	params.SetTranslate(false)
 	params.SetPrintSpecial(false)
 	params.SetPrintProgress(false)