Use 8/8 in/out channels for Bridge audio

include/bridgeprotocol.hpp

@@ -15,6 +15,8 @@ namespace rack {
 #define BRIDGE_NUM_PARAMS 16
 /** An arbitrary number which prevents connection from other protocols (like WebSockets) and old Bridge versions */
 #define BRIDGE_HELLO 0xff00fefd
+#define BRIDGE_INPUTS 8
+#define BRIDGE_OUTPUTS 8
 
 
 /** All commands are called from the client and served by the server
@@ -40,18 +42,12 @@ enum BridgeCommand {
 	- uint32_t sampleRate
 	*/
 	AUDIO_SAMPLE_RATE_SET_COMMAND,
-	/** Sets the number of audio channels
-	Currently not supported, hard-coded at 2.
-	send
-	- uint8_t channels
-	*/
-	AUDIO_CHANNELS_SET_COMMAND,
 	/** Sends and receives an audio buffer
 	send
-	- uint32_t length
-	- float input[length]
+	- uint32_t frames
+	- float input[BRIDGE_INPUTS * frames]
 	recv
-	- float output[length]
+	- float output[BRIDGE_OUTPUTS * frames]
 	*/
 	AUDIO_PROCESS_COMMAND,
 	/** Resumes the audio buffer, forcing Rack to wait on an audio buffer */

src/audio.cpp

@@ -106,7 +106,7 @@ int AudioIO::getDeviceChannels(int device) {
 			return max((int) deviceInfo.inputChannels, (int) deviceInfo.outputChannels);
 	}
 	else if (driver == BRIDGE_DRIVER) {
-		return 2;
+		return max(BRIDGE_OUTPUTS, BRIDGE_INPUTS);
 	}
 	return 0;
 }

src/bridge.cpp

@@ -34,7 +34,6 @@ struct BridgeClientConnection {
 
 	int port = -1;
 	int sampleRate = 0;
-	int audioChannels = 0;
 	bool audioActive = false;
 
 	~BridgeClientConnection() {
@@ -159,30 +158,23 @@ struct BridgeClientConnection {
 				setSampleRate(sampleRate);
 			} break;
 
-			case AUDIO_CHANNELS_SET_COMMAND: {
-				uint8_t channels = 0;
-				recv<uint8_t>(&channels);
-				// TODO
-			} break;
-
 			case AUDIO_PROCESS_COMMAND: {
-				uint32_t length = 0;
-				recv<uint32_t>(&length);
-				if (length == 0 || length > (1<<16)) {
+				uint32_t frames = 0;
+				recv<uint32_t>(&frames);
+				if (frames == 0 || frames > (1<<16)) {
 					ready = false;
 					return;
 				}
 
-				float input[length];
-				if (!recv(&input, length * sizeof(float))) {
+				float input[BRIDGE_INPUTS * frames];
+				if (!recv(&input, BRIDGE_INPUTS * frames * sizeof(float))) {
 					ready = false;
 					return;
 				}
-				float output[length];
-				int frames = length / 2;
+				float output[BRIDGE_OUTPUTS * frames];
 				memset(&output, 0, sizeof(output));
 				processStream(input, output, frames);
-				send(&output, length * sizeof(float));
+				send(&output, BRIDGE_OUTPUTS * frames * sizeof(float));
 				// flush();
 			} break;
 
@@ -247,7 +239,7 @@ struct BridgeClientConnection {
 		if (!audioListeners[port])
 			return;
 		if (audioActive)
-			audioListeners[port]->setChannels(2, 2);
+			audioListeners[port]->setChannels(BRIDGE_OUTPUTS, BRIDGE_INPUTS);
 		else
 			audioListeners[port]->setChannels(0, 0);
 		audioListeners[port]->setSampleRate(sampleRate);