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Add the support of TLV_DB_MINMAX types

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Added the support of the new TLV_DB_MINMAX types.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-06-16 14:28:57 +02:00
parent e5ca075cde
commit f8a34aa683
2 changed files with 43 additions and 0 deletions
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4
include/control.h
View file

@ -174,6 +174,10 @@ typedef enum _snd_ctl_event_type {
#define SND_CTL_TLVT_DB_LINEAR 0x0002
/** TLV type - dB range container */
#define SND_CTL_TLVT_DB_RANGE 0x0003
/** TLV type - dB scale specified by min/max values */
#define SND_CTL_TLVT_DB_MINMAX 0x0004
/** TLV type - dB scale specified by min/max values (with mute) */
#define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
/** Mute state */
#define SND_CTL_TLV_DB_GAIN_MUTE -9999999

39
src/control/tlv.c
View file

@ -89,6 +89,8 @@ int snd_tlv_parse_dB_info(unsigned int *tlv,
}
break;
case SND_CTL_TLVT_DB_SCALE:
case SND_CTL_TLVT_DB_MINMAX:
case SND_CTL_TLVT_DB_MINMAX_MUTE:
#ifndef HAVE_SOFT_FLOAT
case SND_CTL_TLVT_DB_LINEAR:
#endif
@ -165,6 +167,8 @@ int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
*max = *min + (long)(step * (rangemax - rangemin));
return 0;
}
case SND_CTL_TLVT_DB_MINMAX:
case SND_CTL_TLVT_DB_MINMAX_MUTE:
case SND_CTL_TLVT_DB_LINEAR:
*min = (int)tlv[2];
*max = (int)tlv[3];
@ -214,6 +218,23 @@ int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
*db_gain = (volume - rangemin) * step + min;
return 0;
}
case SND_CTL_TLVT_DB_MINMAX:
case SND_CTL_TLVT_DB_MINMAX_MUTE: {
int mindb, maxdb;
mindb = tlv[2];
maxdb = tlv[3];
if (volume <= rangemin || rangemax <= rangemin) {
if (tlv[0] == SND_CTL_TLVT_DB_MINMAX_MUTE)
*db_gain = SND_CTL_TLV_DB_GAIN_MUTE;
else
*db_gain = mindb;
} else if (volume >= rangemax)
*db_gain = maxdb;
else
*db_gain = (maxdb - mindb) * (volume - rangemin) /
(rangemax - rangemin) + mindb;
return 0;
}
#ifndef HAVE_SOFT_FLOAT
case SND_CTL_TLVT_DB_LINEAR: {
int mindb = tlv[2];
@ -297,6 +318,24 @@ int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
}
return 0;
}
case SND_CTL_TLVT_DB_MINMAX:
case SND_CTL_TLVT_DB_MINMAX_MUTE: {
int min, max;
min = tlv[2];
max = tlv[3];
if (db_gain <= min)
*value = rangemin;
else if (db_gain >= max)
*value = rangemax;
else {
long v = (db_gain - min) * (rangemax - rangemin);
if (xdir > 0)
v += (max - min) - 1;
v = v / (max - min) + rangemin;
*value = v;
}
return 0;
}
#ifndef HAVE_SOFT_FLOAT
case SND_CTL_TLVT_DB_LINEAR: {
int min, max;