7 files changed, 20 insertions, 22 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..069d00a
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,7 @@
+project(mossrose)
+
+target_sources(mossrose PUBLIC
+	${CMAKE_CURRENT_LIST_DIR}/mossrose.c
+	${CMAKE_CURRENT_LIST_DIR}/mutex.c
+	${CMAKE_CURRENT_LIST_DIR}/channel.c
+)
diff --git a/src/mossrose-channel.c b/src/channel.c
index 7232417..169b245 100644
--- a/src/mossrose-channel.c
+++ b/src/channel.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
-#include "mossrose-mutex.h"
-#include "mossrose-channel.h"
+#include "mutex.h"
+#include "channel.h"
 
 
 void mossrose_channel_init(struct mossrose_channel_t *chan)
diff --git a/src/mossrose-channel.h b/src/channel.h
index e1db89d..23c11d6 100644
--- a/src/mossrose-channel.h
+++ b/src/channel.h
@@ -2,7 +2,7 @@
 #define MOSSROSE_CHANNEL_H
 
 #include <stddef.h>
-#include "mossrose-mutex.h"
+#include "mutex.h"
 
 struct mossrose_channel_t {
 	mossrose_mutex_t mutex;
diff --git a/src/mossrose.c b/src/mossrose.c
index 02f063a..4f31711 100644
--- a/src/mossrose.c
+++ b/src/mossrose.c
@@ -1,9 +1,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <portaudio.h>
-#include "mossrose.h"
-#include "mossrose-mutex.h"
-#include "mossrose-channel.h"
+#include <mossrose.h>
+#include "mutex.h"
+#include "channel.h"
 
 
 /* ~~~~~~~~~~~~~~~~ type definitions ~~~~~~~~~~~~~~~~ */
@@ -124,15 +124,18 @@ int mossrose_init(double sample_rate, int n_channels)
 int mossrose_play(float *left, float *right, size_t len, int channel)
 {
 	if (channel > 0) {
-		return mossrose_channel_set(mossrose_global.channels+channel, left, right, len, 1);
+		if (mossrose_channel_set(mossrose_global.channels+channel, left, right, len, 1) == 0)
+			return channel;
+		else
+			return -1;
 	}
 	else {
 		struct mossrose_channel_t *chan;
 		for (int i=0; i<mossrose_global.n_channels; i++) {
 			chan = mossrose_global.channels + i;
-			if (mossrose_channel_set(chan, left, right, len, 0) == 0) return 0;
+			if (mossrose_channel_set(chan, left, right, len, 0) == 0) return i;
 		}
-		return 1;
+		return -1;
 	}
 }
 
diff --git a/src/mossrose.h b/src/mossrose.h
deleted file mode 100644
index fb7d088..0000000
--- a/src/mossrose.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef MOSSROSE_H
-#define MOSSROSE_H
-
-#include <stddef.h>
-
-int mossrose_init(double sample_rate, int n_channels);
-
-int mossrose_terminate();
-
-int mossrose_play(float *left, float *right, size_t n_samples, int channel);
-
-#endif
diff --git a/src/mossrose-mutex.c b/src/mutex.c
index b6865f8..4a51fa8 100644
--- a/src/mossrose-mutex.c
+++ b/src/mutex.c
@@ -1,4 +1,4 @@
-#include "mossrose-mutex.h"
+#include "mutex.h"
 
 #ifdef WIN32
 #include <windows.h>
diff --git a/src/mossrose-mutex.h b/src/mutex.h
index 84d1f63..84d1f63 100644
--- a/src/mossrose-mutex.h
+++ b/src/mutex.h