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pcm: softvol - improve TLV data check for new configs

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Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2021-02-26 20:52:23 +01:00
parent 2cfe6addae
commit 058299bff3
1 changed files with 11 additions and 5 deletions
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16
src/pcm/pcm_softvol.c
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@ -707,9 +707,12 @@ static void snd_pcm_softvol_dump(snd_pcm_t *pcm, snd_output_t *out)
snd_pcm_dump(svol->plug.gen.slave, out);
}
static int add_tlv_info(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo)
static int add_tlv_info(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo,
unsigned int *old_tlv, size_t old_tlv_size)
{
unsigned int tlv[4];
if (sizeof(tlv) <= old_tlv_size && memcmp(tlv, old_tlv, sizeof(tlv)) == 0)
return 0;
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);
@ -737,7 +740,7 @@ static int add_user_ctl(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo,
if (svol->max_val == 1)
def_val = 1;
else {
add_tlv_info(svol, cinfo);
add_tlv_info(svol, cinfo, NULL, 0);
/* set zero dB value as default, or max_val if
there is no 0 dB setting */
def_val = svol->zero_dB_val ? svol->zero_dB_val : svol->max_val;
@ -813,7 +816,11 @@ static int softvol_load_control(snd_pcm_t *pcm, snd_pcm_softvol_t *svol,
cinfo.type != SND_CTL_ELEM_TYPE_BOOLEAN) ||
cinfo.count != (unsigned int)cchannels ||
cinfo.value.integer.min != 0 ||
cinfo.value.integer.max != resolution - 1) {
cinfo.value.integer.max != svol->max_val ||
(svol->max_val > 1 &&
(cinfo.access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) == 0) ||
(svol->max_val < 2 &&
(cinfo.access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) != 0)) {
err = snd_ctl_elem_remove(svol->ctl, &cinfo.id);
if (err < 0) {
SNDERR("Control %s mismatch", tmp_name);
@ -831,8 +838,7 @@ static int softvol_load_control(snd_pcm_t *pcm, snd_pcm_softvol_t *svol,
unsigned int tlv[4];
err = snd_ctl_elem_tlv_read(svol->ctl, &cinfo.id, tlv,
sizeof(tlv));
if (err < 0)
add_tlv_info(svol, &cinfo);
add_tlv_info(svol, &cinfo, tlv, err < 0 ? 0 : sizeof(tlv));
}
}