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Prevent gain increase when using AGC in Safety mode

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11101 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Peter D'Hoye 2006-10-01 10:04:40 +00:00
parent 4caa676a9c
commit cb5129d074
1 changed files with 64 additions and 59 deletions
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121
apps/recorder/recording.c
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@ -119,6 +119,8 @@ static short balance_mem[BAL_MEM_SIZE];
/* Automatic Gain Control */
#define AGC_MODE_SIZE 5
#define AGC_SAFETY_MODE 0
static char* agc_preset_str[] =
{ "Off", "S", "L", "D", "M", "V" };
/* "Off",
@ -282,69 +284,71 @@ void auto_gain_control(int *peak_l, int *peak_r, int *balance)
return;
}
/* Automatic balance control */
if ((agc_left > AGC_IMG) && (agc_right > AGC_IMG))
{
if (*balance < -556)
if (agc_mode != AGC_SAFETY_MODE) {
/* Automatic balance control - only if not in safety mode */
if ((agc_left > AGC_IMG) && (agc_right > AGC_IMG))
{
if (*balance > -900)
agc_baltime -= !(peak_time % 4); /* 0.47 - 0.75dB */
else if (*balance > -4125)
agc_baltime--; /* 0.75 - 3.00dB */
else if (*balance > -7579)
agc_baltime -= 2; /* 3.00 - 4.90dB */
else
agc_baltime -= !(peak_time % 8); /* 4.90 - inf dB */
if (agc_baltime > 0)
agc_baltime -= (peak_time % 2);
if (*balance < -556)
{
if (*balance > -900)
agc_baltime -= !(peak_time % 4); /* 0.47 - 0.75dB */
else if (*balance > -4125)
agc_baltime--; /* 0.75 - 3.00dB */
else if (*balance > -7579)
agc_baltime -= 2; /* 3.00 - 4.90dB */
else
agc_baltime -= !(peak_time % 8); /* 4.90 - inf dB */
if (agc_baltime > 0)
agc_baltime -= (peak_time % 2);
}
else if (*balance > 556)
{
if (*balance < 900)
agc_baltime += !(peak_time % 4);
else if (*balance < 4125)
agc_baltime++;
else if (*balance < 7579)
agc_baltime += 2;
else
agc_baltime += !(peak_time % 8);
if (agc_baltime < 0)
agc_baltime += (peak_time % 2);
}
if ((*balance * agc_baltime) < 0)
{
if (*balance < 0)
agc_baltime -= peak_time % 2;
else
agc_baltime += peak_time % 2;
}
increment = ((agc_risetime / 2) > agc_droptime);
if (agc_baltime < -agc_tbal[agc_mode])
{
if (!increment || !agc_gain_is_max(!increment, increment)) {
change_recording_gain(increment, !increment, increment);
set_gain();
}
agc_baltime = 0;
}
else if (agc_baltime > +agc_tbal[agc_mode])
{
if (!increment || !agc_gain_is_max(increment, !increment)) {
change_recording_gain(increment, increment, !increment);
set_gain();
}
agc_baltime = 0;
}
}
else if (*balance > 556)
else if (!(hist_time % 4))
{
if (*balance < 900)
agc_baltime += !(peak_time % 4);
else if (*balance < 4125)
agc_baltime++;
else if (*balance < 7579)
agc_baltime += 2;
else
agc_baltime += !(peak_time % 8);
if (agc_baltime < 0)
agc_baltime += (peak_time % 2);
}
if ((*balance * agc_baltime) < 0)
{
if (*balance < 0)
agc_baltime -= peak_time % 2;
agc_baltime++;
else
agc_baltime += peak_time % 2;
agc_baltime--;
}
increment = ((agc_risetime / 2) > agc_droptime);
if (agc_baltime < -agc_tbal[agc_mode])
{
if (!increment || !agc_gain_is_max(!increment, increment)) {
change_recording_gain(increment, !increment, increment);
set_gain();
}
agc_baltime = 0;
}
else if (agc_baltime > +agc_tbal[agc_mode])
{
if (!increment || !agc_gain_is_max(increment, !increment)) {
change_recording_gain(increment, increment, !increment);
set_gain();
}
agc_baltime = 0;
}
}
else if (!(hist_time % 4))
{
if (agc_baltime < 0)
agc_baltime++;
else
agc_baltime--;
}
/* Automatic gain control */
@ -389,7 +393,8 @@ void auto_gain_control(int *peak_l, int *peak_r, int *balance)
agc_risetime++;
if (agc_risetime >= agc_trise[agc_mode]) {
if (!agc_gain_is_max(true, true)) {
if ((agc_mode != AGC_SAFETY_MODE) &&
(!agc_gain_is_max(true, true))) {
change_recording_gain(true, true, true);
set_gain();
}