Ticket #8015: sblsound.diff

scummvm/resource.cpp

@@ -605 +605 @@
                         pri = -1;
 
                         switch (tag) {
+                        case MKID('SBL '):
+                                pri = 15;
+                                break;
                         case MKID('ADL '):
                                 if (_use_adlib)
                                         pri = 10;

scummvm/sound.cpp

@@ -216 +216 @@
                 _scumm->_mixer->play_raw(NULL, sound, size, rate, SoundMixer::FLAG_UNSIGNED | SoundMixer::FLAG_AUTOFREE);
                 return;
         }
+        // Support for sampled sound effects in Monkey1 and Monkey2
+        else if (ptr != NULL && READ_UINT32_UNALIGNED(ptr) == MKID('SBL ')) {
+                debug(2, "Using SBL sound effect");
+
+                // TODO - Figuring out how the SBL chunk works. Here's an
+                // example:
+                //
+                // 53 42 4c 20 00 00 11 ae  |SBL ....|
+                // 41 55 68 64 00 00 00 03  |AUhd....|
+                // 00 00 80 41 55 64 74 00  |...AUdt.|
+                // 00 11 9b 01 96 11 00 a6  |........|
+                // 00 7f 7f 7e 7e 7e 7e 7e  |...~~~~~|
+                // 7e 7f 7f 80 80 7f 7f 7f  |~.......|
+                // 7f 80 80 7f 7e 7d 7d 7e  |....~}}~|
+                // 7e 7e 7e 7e 7e 7e 7e 7f  |~~~~~~~.|
+                // 7f 7f 7f 80 80 80 80 80  |........|
+                // 80 81 80 80 7f 7f 80 85  |........|
+                // 8b 8b 83 78 72 6d 6f 75  |...xrmou|
+                // 7a 78 77 7d 83 84 83 81  |zxw}....|
+                //
+                // The length of the AUhd chunk always seems to be 3 bytes.
+                // Let's skip that for now.
+                //
+                // The starting offset, length and sample rate is all pure
+                // guesswork. The result sounds reasonable to me, but I've
+                // never heard the original.
+
+                int size = READ_BE_UINT32_UNALIGNED(ptr + 4) - 27;
+                int rate = 8000;
+
+                // Allocate a sound buffer, copy the data into it, and play
+                char *sound = (char*)malloc(size);
+                memcpy(sound, ptr + 33, size);
+                _scumm->_mixer->play_raw(NULL, sound, size, rate, SoundMixer::FLAG_UNSIGNED | SoundMixer::FLAG_AUTOFREE);
+                return;
+        }
 
         if ((_scumm->_features & GF_OLD256) && (ptr != NULL)) {
                 char *sound;