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Rework PCM buffer

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* Linked list instead of static array buffer pointers
* Variable sized chunks
* Improved mix handling
* Reduction in duplicated code
* Reduced IRAM usage w/o sacrificing performance
* Converted to almost entirely unsigned math
* Add pause function to reduce pcm_* exposure to playback.

This WILL break playback on the iPod until linuxstb makes a followup commit.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8612 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Brandon Low 2006-02-07 20:38:55 +00:00
parent 566ce5f951
commit 413da2a3d9
13 changed files with 667 additions and 531 deletions
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12
apps/plugins/metronome.c
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@ -736,18 +736,8 @@ void prepare_tock(void)
}
}
void callback_pcm(unsigned char** start, long* size)
{
if(sound_active) {
*start = (unsigned char *)sndbuf;
*size = sizeof(sndbuf);
sound_active = false;
}
}
void play_tock(void) {
sound_active = true;
rb->pcm_play_data(callback_pcm);
rb->pcm_play_data(NULL,(unsigned char *)sndbuf,sizeof(sndbuf));
tock++;
}