[Scummvm-cvs-logs] SF.net SVN: scummvm: [28405] scummvm/trunk/engines/agi/sound.cpp

[buddha_ at users.sourceforge.net]

Revision: 28405
          http://scummvm.svn.sourceforge.net/scummvm/?rev=28405&view=rev
Author:   buddha_
Date:     2007-08-02 04:39:45 -0700 (Thu, 02 Aug 2007)

Log Message:
-----------
Added reading of volume parameter from Apple IIGS AGI sample header.

Modified Paths:
--------------
    scummvm/trunk/engines/agi/sound.cpp

Modified: scummvm/trunk/engines/agi/sound.cpp
===================================================================
--- scummvm/trunk/engines/agi/sound.cpp	2007-08-02 11:10:26 UTC (rev 28404)
+++ scummvm/trunk/engines/agi/sound.cpp	2007-08-02 11:39:45 UTC (rev 28405)
@@ -76,9 +76,11 @@
 struct IIgsSampleHeader {
 	uint16 type;
 	uint8  pitch; ///< Logarithmic, base is 2**(1/12), unknown multiplier (Possibly in range 1040-1080)
-	uint8  unknown[5];
+	uint8  unknown_Ofs3_Len1;
+	uint8  volume; ///< Current guess: Logarithmic in 6 dB steps
+	uint8  unknown_Ofs5_Len3[3];
 	uint16 size;
-	uint8  unknown2[44];
+	uint8  unknown_Ofs10_Len44[44];
 };
 
 #if 0
@@ -101,9 +103,11 @@
 		// Gold Rush's sample resource 60 (A looping sound of horse's hoof hitting
 		// pavement) is the only one that has 0x7F at header offset 3, all other
 		// samples have 0x00 there.
-		stream.read(header.unknown, 5);
+		header.unknown_Ofs3_Len1 = stream.readByte();
+		header.volume = stream.readByte();
+		stream.read(header.unknown_Ofs5_Len3, 3);
 		header.size = stream.readUint16LE();
-		stream.read(header.unknown2, 44);
+		stream.read(header.unknown_Ofs10_Len44, 44);
 		return !stream.ioFailed();
 	} else // No room in the stream for the header, so failure
 		return false;


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