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ALSA: vmaster: use position offset macro of TLV data 

A series of SNDRV_CTL_TLVO_XXX macro was introduced for position offset
of TLV data. This commit applies a code optimization.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-05-14 07:09:51 +09:00 committed by Takashi Iwai
parent e6f32bf48f
commit 841bdb7c0b
1 changed files with 9 additions and 7 deletions
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16
sound/core/vmaster.c
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@ -421,13 +421,15 @@ struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
kctl->private_free = master_free;
/* additional (constant) TLV read */
if (tlv &&
(tlv[0] == SNDRV_CTL_TLVT_DB_SCALE ||
tlv[0] == SNDRV_CTL_TLVT_DB_MINMAX ||
tlv[0] == SNDRV_CTL_TLVT_DB_MINMAX_MUTE)) {
kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
memcpy(master->tlv, tlv, sizeof(master->tlv));
kctl->tlv.p = master->tlv;
if (tlv) {
unsigned int type = tlv[SNDRV_CTL_TLVO_TYPE];
if (type == SNDRV_CTL_TLVT_DB_SCALE ||
type == SNDRV_CTL_TLVT_DB_MINMAX ||
type == SNDRV_CTL_TLVT_DB_MINMAX_MUTE) {
kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
memcpy(master->tlv, tlv, sizeof(master->tlv));
kctl->tlv.p = master->tlv;
}
}
return kctl;