modules/mixer: consider epsilon in fast-path edge cases

Near the fringes of 0,1 it should just be considered 0,1, which
handles rounding error as well as slightly increasing the
quantity of frames the fast path will tend to run on interpolated
fades.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/modules/mixer/mixer.c b/src/modules/mixer/mixer.c
index b6cc16c..fb62daf 100644
--- a/src/modules/mixer/mixer.c
+++ b/src/modules/mixer/mixer.c
@@ -151,17 +151,17 @@ static void mixer_prepare_frame(til_module_context_t *context, til_stream_t *str
 	case MIXER_STYLE_BLEND: {
 		float	T = ctxt->vars.T;
 
-		if (T < 1.f) {
+		if (T < .999f) {
 			til_module_render(ctxt->inputs[0].module_ctxt, stream, ticks, &fragment);
 
-			if (T > 0.f)
+			if (T > 0.001f)
 				ctxt->snapshots[0] = til_fb_fragment_snapshot(&fragment, 0);
 		}
 
-		if (T > 0.f) {
+		if (T > 0.001f) {
 			til_module_render(ctxt->inputs[1].module_ctxt, stream, ticks, &fragment);
 
-			if (T < 1.f)
+			if (T < .999f)
 				ctxt->snapshots[1] = til_fb_fragment_snapshot(&fragment, 0);
 		}
 		break;
@@ -226,7 +226,7 @@ static void mixer_render_fragment(til_module_context_t *context, til_stream_t *s
 		float			T = ctxt->vars.T;
 		float			one_sub_T = 1.f - T;
 
-		if (T <= 0.f || T  >= 1.f)
+		if (T <= 0.001f || T  >= .999f)
 			break;
 
 		assert(ctxt->snapshots[0]);
@@ -285,7 +285,7 @@ static void mixer_render_fragment(til_module_context_t *context, til_stream_t *s
 		til_fb_fragment_t	*snapshot_a, *snapshot_b;
 		float			T = ctxt->vars.T;
 
-		if (T <= 0.f || T  >= 1.f)
+		if (T <= 0.001f || T  >= .999f)
 			break;
 
 		assert(ctxt->snapshots[0]);