| 1 |
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| 2 | Mad.ArrayBuffers.SubStream = Mad.ArrayBuffers.ByteStream.extend({
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| 3 | init: function(stream, offset, length) {
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| 4 | this.offset = 0;
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| 5 | this.start = offset;
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| 6 | this.parentStream = stream;
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| 7 | this.length = length;
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| 8 | },
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| 9 |
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| 10 | substream: function (offset, length) {
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| 11 | return new Mad.SubStream(this.parentStream, this.start + offset, length);
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| 12 | },
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| 13 |
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| 14 | getU8: function(offset, bigEndian) {
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| 15 | return this.parentStream.getU8(this.start + offset, bigEndian);
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| 16 | },
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| 17 |
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| 18 | getU16: function(offset, bigEndian) {
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| 19 | return this.parentStream.getU16(this.start + offset, bigEndian);
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| 20 | },
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| 21 |
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| 22 | getU32: function(offset, bigEndian) {
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| 23 | return this.parentStream.getU32(this.start + offset, bigEndian);
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| 24 | },
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| 25 |
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| 26 | absoluteAvailable: function(n) {
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| 27 | return this.parentStream.absoluteAvailable(this.start + n);
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| 28 | },
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| 29 |
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| 30 | seek: function(n) {
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| 31 | this.offset += n;
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| 32 | },
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| 33 |
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| 34 | read: function(n) {
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| 35 | var result = this.peek(n);
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| 36 | this.seek(n);
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| 37 | return result;
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| 38 | },
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| 39 |
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| 40 | peek: function(n) {
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| 41 | return this.get(this.offset, n);
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| 42 | },
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| 43 |
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| 44 | get: function(offset, length) {
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| 45 | return this.parentStream.get(this.start + offset, length);
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| 46 | },
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| 47 |
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| 48 | slice: function(start, end) {
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| 49 | return this.parentStream.get(this.start + start, end - start);
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| 50 | },
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| 51 |
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| 52 | requestAbsolute: function(n, callback) {
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| 53 | this.parentStream.requestAbsolute(this.start + n)
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| 54 | },
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| 55 |
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| 56 | request: function(n, callback) {
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| 57 | this.parentStream.requestAbsolute(this.start + this.offset + n)
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| 58 | }
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| 59 | });
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