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1// AC Audio Bridge for Max for Live
2// Receives sample data from jweb and writes to buffer~ objects
3//
4// Input: [numSamples, ...leftSamples, ...rightSamples]
5// Output: writes to buffer~ ac-left and ac-right
6
7autowatch = 1;
8inlets = 1;
9outlets = 1;
10
11// Ring buffer settings
12var BUFFER_SIZE_MS = 500; // 500ms ring buffer
13var sampleRate = 48000; // Will be updated from Max
14var bufferSizeSamples = Math.floor(BUFFER_SIZE_MS * sampleRate / 1000);
15
16// Write position tracking
17var writePos = 0;
18var leftBuffer = null;
19var rightBuffer = null;
20
21// Initialize buffers
22function loadbang() {
23 post("AC Audio Bridge: Initializing...\n");
24
25 // Get references to buffers
26 leftBuffer = new Buffer("ac-left");
27 rightBuffer = new Buffer("ac-right");
28
29 // Set buffer sizes (500ms at 48kHz = 24000 samples)
30 bufferSizeSamples = Math.floor(BUFFER_SIZE_MS * sampleRate / 1000);
31
32 // Resize buffers
33 leftBuffer.send("sizeinsamps", bufferSizeSamples);
34 rightBuffer.send("sizeinsamps", bufferSizeSamples);
35
36 // Clear buffers
37 leftBuffer.send("clear");
38 rightBuffer.send("clear");
39
40 // Enable looping on groove~
41 outlet(0, "loop", 1);
42
43 post("AC Audio Bridge: Ready! Buffer size: " + bufferSizeSamples + " samples\n");
44}
45
46// Handle incoming sample data
47function list() {
48 var args = arrayfromargs(arguments);
49
50 if (args.length < 1) return;
51
52 var numSamples = args[0];
53
54 // Validate we have enough data
55 if (args.length < 1 + numSamples * 2) {
56 post("AC Audio Bridge: Invalid sample data\n");
57 return;
58 }
59
60 // Make sure buffers are initialized
61 if (!leftBuffer || !rightBuffer) {
62 leftBuffer = new Buffer("ac-left");
63 rightBuffer = new Buffer("ac-right");
64 }
65
66 // Write samples to buffers using poke
67 for (var i = 0; i < numSamples; i++) {
68 var leftSample = args[1 + i];
69 var rightSample = args[1 + numSamples + i];
70
71 // Write to buffer at current position
72 leftBuffer.poke(1, writePos, leftSample);
73 rightBuffer.poke(1, writePos, rightSample);
74
75 // Advance write position (wrap around)
76 writePos = (writePos + 1) % bufferSizeSamples;
77 }
78
79 // Output status periodically
80 // outlet(0, "wrote", numSamples, "pos", writePos);
81}
82
83// Handle messages
84function anything() {
85 var msg = messagename;
86 var args = arrayfromargs(arguments);
87
88 if (msg === "samplerate") {
89 sampleRate = args[0];
90 bufferSizeSamples = Math.floor(BUFFER_SIZE_MS * sampleRate / 1000);
91 post("AC Audio Bridge: Sample rate set to " + sampleRate + "\n");
92 } else if (msg === "clear") {
93 writePos = 0;
94 if (leftBuffer) leftBuffer.send("clear");
95 if (rightBuffer) rightBuffer.send("clear");
96 post("AC Audio Bridge: Buffers cleared\n");
97 } else if (msg === "status") {
98 post("AC Audio Bridge: writePos=" + writePos + "/" + bufferSizeSamples + "\n");
99 }
100}
101
102// Initialize on script load
103function bang() {
104 loadbang();
105}