mp3 test

2026-06-13 16:04:05 +09:00 · 2023-01-13 22:56:59 +09:00
parent ac684fed71
commit 1c9e99bb66
12 changed files with 2627 additions and 0 deletions
--- a/assets/disk0/tvdos/include/js-mp3/consts.js
+++ b/assets/disk0/tvdos/include/js-mp3/consts.js
@@ -0,0 +1,60 @@
+var consts = {
+    Version2_5: 0,
+    VersionReserved: 1,
+    Version2: 2,
+    Version1: 3,
+
+    LayerReserved: 0,
+    Layer3: 1,
+    Layer2: 2,
+    Layer1: 3,
+
+    ModeStereo: 0,
+    ModeJointStereo: 1,
+    ModeDualChannel: 2,
+    ModeSingleChannel: 3,
+
+    SamplesPerGr: 576,
+
+    SamplingFrequency44100: 0,
+    SamplingFrequency48000: 1,
+    SamplingFrequency32000: 2,
+    SamplingFrequencyReserved: 3,
+
+    newSamplingFrequencyInstance: function (value) {
+        var instance = {
+            value: value
+        };
+        instance.Int = function () {
+            switch(instance.value) {
+                case consts.SamplingFrequency44100:
+                    return 44100;
+                case consts.SamplingFrequency48000:
+                    return 48000;
+                case consts.SamplingFrequency32000:
+                    return 32000;
+            }
+            throw new Error('not reached');
+        };
+        return instance;
+    },
+
+    SfBandIndicesSet: {
+        0: { // SamplingFrequency44100
+            L: [0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 52, 62, 74, 90, 110, 134, 162, 196, 238, 288, 342, 418, 576],
+            S: [0, 4, 8, 12, 16, 22, 30, 40, 52, 66, 84, 106, 136, 192]
+        },
+        1: { // SamplingFrequency48000
+            L: [0, 4, 8, 12, 16, 20, 24, 30, 36, 42, 50, 60, 72, 88, 106, 128, 156, 190, 230, 276, 330, 384, 576],
+            S: [0, 4, 8, 12, 16, 22, 28, 38, 50, 64, 80, 100, 126, 192]
+        },
+        2: { // SamplingFrequency32000
+            L: [0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 54, 66, 82, 102, 126, 156, 194, 240, 296, 364, 448, 550, 576],
+            S: [0, 4, 8, 12, 16, 22, 30, 42, 58, 78, 104, 138, 180, 192]
+        }
+    }
+};
+
+consts.BytesPerFrame = consts.SamplesPerGr * 2 * 4;
+
+exports = consts;