NewLC - Playing WAVs from resource file? - Comments

Playing WAVs from resource file?

parisnlc — Sun, 05 Oct 2003 12:56:43 +0200

..The only problem now is how to correctly convert a wav file into
a TDescC8 buffer that can be passed to NewDesPlayerReadOnlyL(..)

Anyone aware of any wav2ascii utilities that do an ascii dump of a
wav file in 'R''I''F''F'.. ascii format?

..I don't know if this will even work!
..but hey, nothing ventured, nothing gained

paris.

Playing WAVs from resource file?

parisnlc — Fri, 03 Oct 2003 22:19:22 +0200

..then CSoundObject ::Internalize() could extract the PCMdata and pass it to CMdaAudioPlayerUtility::NewDesPlayerReadOnlyL(PCMdata)??!!

..hey now, it's a crazy idea...but it might just work!

nice one Eric.!

paris.

Playing WAVs from resource file?

eric — Fri, 03 Oct 2003 21:49:00 +0200

Then you can write internalize/externalize methods for your CSoundObject and yes, it should probably read/write binary streams of pcm data.

Playing WAVs from resource file?

parisnlc — Fri, 03 Oct 2003 20:43:12 +0200

I can see how objects can be serialised to a CDirectFileStore
but I'm not sure how to treat a wav file. How do you actually inject the
wav file's binary data into a store?

I already have a CSoundObject class for each loaded wav but there's no point
storing that class because it only has a handle to the wav file on disk - whereas I
want to store the ?whole? wav file in memory.

I'm hoping that (ultimately) I can use swizzling to get at each
stored wav file without necessarily loading the whole file store itself.
(This is all hypothetical mind you, based on what I've read in the docs)

paris.

Playing WAVs from resource file?

parisnlc — Fri, 03 Oct 2003 13:31:27 +0200

>(but you will need to play them from memory).

hmm.. now I'm wondering if my app will become unacceptably bloated
if I preload all my sound effects into RAM?
I have about 15 8bit-8khz sounds totalling 200k.

My understanding is that the Nokia 3650 has 4MB of internal memory for application and storage use and the maximum program heap size is up to 1.4 MB.

I presume the 4MB is storage disk space and the 1.4MB is the internal
memory (RAM) size (correct me if I'm wrong).
(not sure of 7650 specs yet.)

I assume that if I am considering preloading images and sounds
in this way I should really try to stay below 200KB?
(the docs point recommend this.. but why??).

It isn't absolutely essential that all wavs are in memory, so if there is a good reason why I should avoid doing this where possible I'd be interested to know.

cheers.

paris.

Playing WAVs from resource file?

eric — Fri, 03 Oct 2003 12:40:18 +0200

You can take a look at CDirectFileStore.

This is not really resource files but will give you the possibility to put several Wavs into one file (but you will need to play them from memory).

Eric

Playing WAVs from resource file?

parisnlc — Fri, 03 Oct 2003 11:12:32 +0200