WIP! bgm_xyscope: handle 32 bit samples

Author: fridtjof

src/modules/bgm_xyscope.c

@@ -25,7 +25,7 @@
 #define PLOSSFAC ((BUFFER_FRAMES) / 64)
 
 enum samplesize {
-	SIZE_8, SIZE_16
+	SIZE_8, SIZE_16, SIZE_32
 };
 
 static snd_pcm_t * scope_pcm;
@@ -60,6 +60,7 @@ static int dotimeout;
 static oscore_task scope_task;
 
 #define SM_ALGORITHM(sample, shr, sub) (((byte) (sample >> shr)) - sub)
+#define SM_ALGORITHM_SCALE(sample, scale, sub) (((byte) ((float) sample * (scale))) - sub)
 #define LD_ALGORITHM(typ, shr, sub) \
 	for (int indx = 0; indx < BUFFER_FRAMES; indx++) { \
 		typ sampleA = ((typ *) bufferA)[indx * (sf_2c ? 2 : 1)]; \
@@ -120,6 +121,12 @@ static void * thread_func(void * ign) {
 			} else {
 				LD_ALGORITHM(byte, 0, 0x80);
 			}
+		} else if (sf_sampsize == SIZE_32) {
+			if (sf_us) {
+				LD_ALGORITHM(unsigned int, 24, 0);
+			} else {
+				LD_ALGORITHM(unsigned int, 24, 0x80);
+			}
 		}
 		// This actually connects it all together
 		for (int i = 0; i < frames; i++) {
@@ -284,6 +291,9 @@ int init(int modulen, char* argstr) {
 		case SIZE_16:
 			bytesPerSample = 2;
 		break;
+		case SIZE_32:
+			bytesPerSample = 4;
+		break;
 	}
 
 	bufferA = malloc(BUFFER_FRAMES * (sf_2c ? 2 : 1) * bytesPerSample);