Add a real-work ExpGolomb test

Make sure that a reasonable sequence parameter set can be decoded.

@@ -21,6 +21,7 @@
   */
 var
   buffer,
+  ExpGolomb = window.videojs.hls.ExpGolomb,
   expGolomb;
 
 module('Exponential Golomb coding');
@@ -44,32 +45,62 @@ test('small numbers are coded correctly', function() {
 
   while (i--) {
     buffer = new Uint8Array([expected[i][0]]);
-    expGolomb = new window.videojs.hls.ExpGolomb(buffer);
+    expGolomb = new ExpGolomb(buffer);
     result = expGolomb.readUnsignedExpGolomb();
     equal(expected[i][1], result, expected[i][0] + ' is decoded to ' + expected[i][1]);
   }
 });
 
 test('drops working data as it is parsed', function() {
-  var expGolomb = new window.videojs.hls.ExpGolomb(new Uint8Array([0x00, 0xFF]));
+  var expGolomb = new ExpGolomb(new Uint8Array([0x00, 0xFF]));
   expGolomb.skipBits(8);
   equal(8, expGolomb.bitsAvailable(), '8 bits remain');
   equal(0xFF, expGolomb.readBits(8), 'the second byte is read');
 });
 
 test('drops working data when skipping leading zeros', function() {
-  var expGolomb = new window.videojs.hls.ExpGolomb(new Uint8Array([0x00, 0x00, 0x00, 0x00, 0xFF]));
+  var expGolomb = new ExpGolomb(new Uint8Array([0x00, 0x00, 0x00, 0x00, 0xFF]));
   equal(32, expGolomb.skipLeadingZeros(), '32 leading zeros are dropped');
   equal(8, expGolomb.bitsAvailable(), '8 bits remain');
   equal(0xFF, expGolomb.readBits(8), 'the second byte is read');
 });
 
 test('drops working data when skipping leading zeros', function() {
-  var expGolomb = new window.videojs.hls.ExpGolomb(new Uint8Array([0x15, 0xab, 0x40, 0xc8, 0xFF]));
+  var expGolomb = new ExpGolomb(new Uint8Array([0x15, 0xab, 0x40, 0xc8, 0xFF]));
   equal(3, expGolomb.skipLeadingZeros(), '3 leading zeros are dropped');
   equal((8 * 4) + 5, expGolomb.bitsAvailable(), '37 bits remain');
   expGolomb.skipBits(1);
   equal(0x5a, expGolomb.readBits(8), 'the next bits are read');
 });
 
-})(this);  
+test('parses a sequence parameter set', function() {
+  var
+    sps = new Uint8Array([
+      0x27, 0x42, 0xe0, 0x0b,
+      0xa9, 0x18, 0x60, 0x9d,
+      0x80, 0x35, 0x06, 0x01,
+      0x06, 0xb6, 0xc2, 0xb5,
+      0xef, 0x7c, 0x04
+    ]),
+    expGolomb = new ExpGolomb(sps);
+
+  strictEqual(expGolomb.readBits(8), 0x27, 'the NAL type specifies an SPS');
+  strictEqual(expGolomb.readBits(8), 66, 'profile_idc is 66');
+  strictEqual(expGolomb.readBits(4), 0x0E, 'constraints 0-3 are correct');
+
+  expGolomb.skipBits(4);
+  strictEqual(expGolomb.readBits(8), 11, 'level_idc is 11');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 0, 'seq_parameter_set_id is 0');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 1, 'log2_max_frame_num_minus4 is 1');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 0, 'pic_order_cnt_type is 0');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 3, 'log2_max_pic_order_cnt_lsb_minus4 is 3');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 2, 'max_num_ref_frames is 2');
+  strictEqual(expGolomb.readBits(1), 0, 'gaps_in_frame_num_value_allowed_flag is false');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 11, 'pic_width_in_mbs_minus1 is 11');
+  strictEqual(expGolomb.readUnsignedExpGolomb(), 8, 'pic_height_in_map_units_minus1 is 8');
+  strictEqual(expGolomb.readBits(1), 1, 'frame_mbs_only_flag is true');
+  strictEqual(expGolomb.readBits(1), 1, 'direct_8x8_inference_flag is true');
+  strictEqual(expGolomb.readBits(1), 0, 'frame_cropping_flag is false');
+});
+
+})(this);