Initial commit: ACE-Step UI - Open source music generation interface

2026-02-04 03:09:38 +02:00
commit 44f7563014
187 changed files with 99985 additions and 0 deletions
@@ -0,0 +1,109 @@
+function interleave(inputL, inputR) {
+    var length = inputL.length + inputR.length;
+    var result = new Int16Array(length);
+
+    var index = 0,
+        inputIndex = 0;
+
+    while (index < length) {
+        result[index++] = inputL[inputIndex];
+        result[index++] = inputR[inputIndex];
+        ++inputIndex;
+    }
+    return result;
+}
+
+function floatTo16BitPCM(output, offset, input) {
+    for (var i = 0; i < input.length; i++, offset += 2) {
+        output.setInt16(offset, input[i], true);
+    }
+}
+
+function writeString(view, offset, string) {
+    for (var i = 0; i < string.length; i++) {
+        view.setUint8(offset + i, string.charCodeAt(i));
+    }
+}
+
+function encodeWAV(samples, numChannels, sampleRate) {
+    var buffer = new ArrayBuffer(44 + samples.length * 2);
+    var view = new DataView(buffer);
+
+    /* RIFF identifier */
+    writeString(view, 0, 'RIFF');
+    /* RIFF chunk length */
+    view.setUint32(4, 36 + samples.length * 2, true);
+    /* RIFF type */
+    writeString(view, 8, 'WAVE');
+    /* format chunk identifier */
+    writeString(view, 12, 'fmt ');
+    /* format chunk length */
+    view.setUint32(16, 16, true);
+    /* sample format (raw) */
+    view.setUint16(20, 1, true);
+    /* channel count */
+    view.setUint16(22, numChannels, true);
+    /* sample rate */
+    view.setUint32(24, sampleRate, true);
+    /* byte rate (sample rate * block align) */
+    view.setUint32(28, sampleRate * numChannels * 2, true);
+    /* block align (channel count * bytes per sample) */
+    view.setUint16(32, numChannels * 2, true);
+    /* bits per sample */
+    view.setUint16(34, 16, true);
+    /* data chunk identifier */
+    writeString(view, 36, 'data');
+    /* data chunk length */
+    view.setUint32(40, samples.length * 2, true);
+
+    floatTo16BitPCM(view, 44, samples);
+
+    return view;
+}
+
+
+
+var sample_rate = 44100;
+var kbps = 128;
+var channels = 1;
+var mp3encoder = null;
+
+var samples_left = null;
+var samples_right = null;
+var first_buffer = true;
+
+onmessage = function( ev ) {
+    if (!ev.data) return ;
+
+	if (ev.data.sample_rate) {
+		sample_rate = ev.data.sample_rate / 1;
+		kbps = ev.data.kbps / 1;
+        channels = ev.data.channels / 1;
+
+		return ;
+	}
+
+    if (first_buffer) {
+        samples_left = new Int16Array (ev.data, 0);
+        first_buffer = false;
+
+        if (channels > 1) return ;
+    }
+
+    if (ev.data && channels > 1) {
+        samples_right = new Int16Array (ev.data, 0);
+    }
+
+    ///
+    var interleaved = undefined;
+    if (channels > 1) {
+        interleaved = interleave(samples_left, samples_right);
+    } else {
+        interleaved = samples_left;
+    }
+
+    var dataview = encodeWAV(interleaved, channels, sample_rate);
+    var audioBlob = new Blob([dataview], { type: 'audio/wav' });
+
+    postMessage( audioBlob );
+}