ncmixer

commit 4467d76f3e607b64e5bcba38c80acfbe143f1df4
parent 1dbad1ae29c1aaa1faecce0d77d8dc65f27510f3
Author: sin <sin@2f30.org>
Date:   Sat, 11 Jun 2016 10:52:45 +0100

Add support for leveling inputs

Diffstat:
M
ncmixer.c
 | 
31
+++++++++++++++++++++++++++++--

1 file changed, 29 insertions(+), 2 deletions(-)
diff --git a/ncmixer.c b/ncmixer.c
@@ -63,9 +63,10 @@ struct input {
 	short attenuated_buf[NSAMPLES];
 	int nsamples;
 	int monitor;
+	float level;
 } inputs[] = {
-	{ .listenfd = -1, .clifd = -1 },
-	{ .listenfd = -1, .clifd = -1 }
+	{ .listenfd = -1, .clifd = -1, .level = 1.0f },
+	{ .listenfd = -1, .clifd = -1, .level = 1.0f }
 };
 
 struct output {
@@ -207,6 +208,18 @@ key_cb(int fd)
 	case '2':
 		inputs[1].monitor = !inputs[1].monitor;
 		break;
+	case 'q':
+		inputs[0].level = MAX(inputs[0].level - 0.125f, 0.0f);
+		break;
+	case 'w':
+		inputs[0].level = MIN(inputs[0].level + 0.125f, 1.0f);
+		break;
+	case 'o':
+		inputs[1].level = MAX(inputs[1].level - 0.125f, 0.0f);
+		break;
+	case 'p':
+		inputs[1].level = MIN(inputs[1].level + 0.125f, 1.0f);
+		break;
 	}
 	return 0;
 }
@@ -226,6 +239,18 @@ consume(struct input *in)
 }
 
 void
+level(struct input *in)
+{
+	short *ch0 = (short *)in->buf;
+	int i;
+
+	for (i = 0; i < in->nsamples; i++) {
+		*ch0 *= in->level;
+		ch0++;
+	}
+}
+
+void
 attenuate(struct input *in, float factor)
 {
 	short *ch0 = (short *)in->buf;
@@ -448,6 +473,8 @@ loop(void)
 					pfd[in->clifd].events = 0;
 					close(in->clifd);
 					in->clifd = -1;
+				} else {
+					level(in);
 				}
 			}
 		}