#7346 closed feature request (fixed)
AUDIO: compress music from Broken Sword
| Reported by: | SF/noscript | Owned by: | lavosspawn |
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| Priority: | normal | Component: | Engine: Sword1 |
| Version: | Keywords: | ||
| Cc: | Game: | Broken Sword 1 |
Description
The Files from the MUSIC Directory are WAVs. So it could be compressed to OGG or MP3. But it must be supportet from scummVM.
Ticket imported from: #875396. Ticket imported from: feature-requests/162.
Change History (11)
comment:1 by , 20 years ago
comment:2 by , 20 years ago
| Summary: | compress music from Broken Sword → AUDIO: compress music from Broken Sword |
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comment:4 by , 20 years ago
| Owner: | set to |
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comment:5 by , 20 years ago
Broken Sword 2 supports compressed speech and music in the development version. Broken Sword 1 currently doesn't. Still, Broken Sword 1 could probably use a similar implementation.
For Broken Sword 2, I did the following:
I already had an extract/compress program, as described in an earlier comment. I had to make a few changes to it, but nothing too major. (Well, the format of the compressed file had to be changed slightly, but I didn't consider backwards compatibility important at this stage. :-)
For playback, I first I wrote an AudioStream class to decode Broken Sword 2 compressed audio. This is used for both speech and music. There are two functions that deal with speech - one for playing it immediately, and one to decode it to a buffer to be played later - both of which were easily rewritten to use the new AudioStream class.
The next, and much tricker, step was to rewrite the music code to use this AudioStream class. I wrote a new AudioStream class that would simply use another AudioStream object for decoding the sound - a kind of "wrapper" - and then added fading and looping on top of that.
You may have noticed a pattern here: The trick is to rewrite the playback to use AudioStream objects. Once that works, you can easily replace the custom decoders with one of the stock decoders: MP3, Ogg Vorbis or FLAC. (Though for Broken Sword 2, FLAC actually produces larger files than the originals.)
"Enough about Broken Sword 2," I hear you cry. "What about Broken Sword 1?"
Well, for one thing it appears to use a different compression scheme for the speech (and the demo apparently uses a slightly different header format than the full game), so a new extract/compress program would have to be written, as well as a new AudioStream class for playback.
The "wrapper" AudioStream class for music could probably be adapted for Broken Sword 1 without too much trouble. As has been noted, Broken Sword 1 stores its music as separate WAV files. I don't think we have any AudioStream class for that, but this should be fairly trivial.
In theory, at least. I haven't actually done any work on it.
comment:6 by , 20 years ago
| Owner: | changed from to |
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comment:7 by , 20 years ago
Reassigned to lavosspawn, since he appears to have done most of the work on it already. (Good thing, too, since I hadn't even planned on looking at it any time soon.)
comment:9 by , 20 years ago
| Resolution: | → fixed |
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| Status: | new → closed |
comment:10 by , 20 years ago
Not quite. You still need to write something about it in the tools README, the ScummVM README and the ScummVM LaTeX documentation. ;-)
comment:11 by , 5 years ago
| Component: | → Engine: Sword1 |
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| Game: | → Broken Sword 1 |
Indeed, they could be.
Also, for Broken Sword 2, see <https://sourceforge.net/tracker/ index.php? func=detail&aid=854561&group_id=37116&atid=418822>