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different kind of recording beep: more faint, but not disturbing prerecording, can beep while we already record (no latency due to beep)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5511 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2004-12-24 08:42:45 +00:00
parent 35c69283d4
commit dfa95c334b
3 changed files with 13 additions and 13 deletions
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12
firmware/mpeg.c
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@ -2377,17 +2377,17 @@ void mpeg_set_recording_gain(int left, int right, bool use_mic)
}
/* try to make some kind of beep, also in recording mode */
void mpeg_beep(int freq, int duration)
void mpeg_beep(int duration)
{
(void)freq; /* not used yet */
long starttick = current_tick;
do
{
mas_codec_writereg(0, 0); /* some little-understood sequence, */
mas_codec_writereg(0, 1); /* there may be better ways */
{ /* toggle bit 0 of codec register 0, toggling the DAC off & on.
* While this is still audible even without an external signal,
* it doesn't affect the (pre-)recording. */
mas_codec_writereg(0, shadow_codec_reg0 ^ 1);
mas_codec_writereg(0, shadow_codec_reg0);
}
while (current_tick - starttick < duration);
mas_codec_writereg(0, shadow_codec_reg0); /* restore it */
}
void mpeg_new_file(const char *filename)