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pcm: softvol: use position offset macro of TLV data

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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 2018-05-15 21:36:38 +09:00 • committed by Takashi Iwai
parent b0b720513e
commit 6dc2ed4090
1 changed files with 7 additions and 4 deletions
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11
src/pcm/pcm_softvol.c
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@ -31,6 +31,8 @@
#include "pcm_local.h"
#include "pcm_plugin.h"
#include <sound/tlv.h>
#ifndef PIC
/* entry for static linking */
const char *_snd_module_pcm_softvol = "";
@ -708,10 +710,11 @@ static void snd_pcm_softvol_dump(snd_pcm_t *pcm, snd_output_t *out)
static int add_tlv_info(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo)
{
unsigned int tlv[4];
tlv[0] = SND_CTL_TLVT_DB_SCALE;
tlv[1] = 2 * sizeof(int);
tlv[2] = (int)(svol->min_dB * 100);
tlv[3] = (int)((svol->max_dB - svol->min_dB) * 100 / svol->max_val);
tlv[SNDRV_CTL_TLVO_TYPE] = SND_CTL_TLVT_DB_SCALE;
tlv[SNDRV_CTL_TLVO_LEN] = 2 * sizeof(int);
tlv[SNDRV_CTL_TLVO_DB_SCALE_MIN] = (int)(svol->min_dB * 100);
tlv[SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP] =
(int)((svol->max_dB - svol->min_dB) * 100 / svol->max_val);
return snd_ctl_elem_tlv_write(svol->ctl, &cinfo->id, tlv);
}