diff options
Diffstat (limited to 'alsa-binding/Alsa-AddCtl.c')
| -rw-r--r-- | alsa-binding/Alsa-AddCtl.c | 37 |
1 files changed, 15 insertions, 22 deletions
diff --git a/alsa-binding/Alsa-AddCtl.c b/alsa-binding/Alsa-AddCtl.c index 60be790..9c48914 100644 --- a/alsa-binding/Alsa-AddCtl.c +++ b/alsa-binding/Alsa-AddCtl.c @@ -54,6 +54,11 @@ #define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000 #endif + +#define PRESET_MIN_DB -51.0 +#define ZERO_DB 0.0 +#define PRESET_STEP 1 + static const unsigned int *allocate_bool_fake_tlv(void) { static const SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(range, -10000, 0); unsigned int *tlv = malloc(sizeof (range)); @@ -62,24 +67,14 @@ static const unsigned int *allocate_bool_fake_tlv(void) { return tlv; } -static const unsigned int *allocate_int_dbscale_tlv(int min_dB, int max_dB) { +static const unsigned int *allocate_int_dbscale_tlv(int min_dB, int max_dB, int resolution) { // SNDRV_CTL_TLVD_DECLARE_DB_SCALE(range, min, step, mute); size_t tlvSize = sizeof (4 * sizeof (unsigned int)); unsigned int *tlv = malloc(tlvSize); tlv[0] = SND_CTL_TLVT_DB_SCALE; tlv[1] = 2 * sizeof(int); tlv[2] = (int)(min_dB * 100); - tlv[3] = (int)((max_dB - min_dB) * 100 / max_dB); - return tlv; -} - -static const unsigned int *allocate_int_linear_tlv(int max, int min) { - // SNDRV_CTL_TLVD_DECLARE_DB_LINEAR (range, min, max); - unsigned int *tlv = malloc(4 * sizeof (unsigned int)); - tlv[0] = SNDRV_CTL_TLVT_DB_LINEAR; - tlv[1] = (unsigned int)(2 * sizeof (unsigned int)); - tlv[2] = (unsigned int)(-min * 100); - tlv[3] = (unsigned int)(max * 100); + tlv[3] = (int)((max_dB - min_dB) * 100 / resolution); return tlv; } @@ -88,7 +83,7 @@ STATIC json_object * addOneSndCtl(afb_req_t request, snd_ctl_t *ctlDev, json_obj json_object *tmpJ; const char *ctlName; ctlRequestT ctlRequest; - int ctlMax=100, ctlMin=0, ctlStep, ctlCount, ctlSubDev=0, ctlSndDev=0; + int ctlMax=100, ctlMin=0, ctlStep=1, ctlCount=1, ctlSubDev=0, ctlSndDev=0; snd_ctl_elem_type_t ctlType=SND_CTL_ELEM_TYPE_NONE; snd_ctl_elem_info_t *elemInfo; snd_ctl_elem_id_t *elemId; @@ -107,7 +102,6 @@ STATIC json_object * addOneSndCtl(afb_req_t request, snd_ctl_t *ctlDev, json_obj goto OnErrorExit; } - // We are facing a software ctl if (ctlNumid == CTL_AUTO) { done = json_object_object_get_ex(ctlJ, "type", &tmpJ); @@ -224,10 +218,12 @@ STATIC json_object * addOneSndCtl(afb_req_t request, snd_ctl_t *ctlDev, json_obj } } + // Prepare fake dbscale TLV values + int min = PRESET_MIN_DB, max = ZERO_DB, step = PRESET_STEP; + // Fulup needed to be tested with some dB expert !!! json_object *dbscaleJ; if (json_object_object_get_ex(ctlJ, "dbscale", &dbscaleJ)) { - int min, max; if (json_object_get_type(dbscaleJ) != json_type_object) { afb_req_fail_f(request, "ctl-invalid-dbscale", "devid=%s crl=%s invalid json in integer control", snd_ctl_name(ctlDev), json_object_get_string(ctlJ)); @@ -246,16 +242,13 @@ STATIC json_object * addOneSndCtl(afb_req_t request, snd_ctl_t *ctlDev, json_obj // default value 1dB json_object_object_get_ex(ctlJ, "step", &tmpJ); - int step = json_object_get_int(tmpJ); + step = json_object_get_int(tmpJ); if (step <= 0) step = 1; - - elemTlv = allocate_int_dbscale_tlv(min, max); - } - } else { - // provide a fake linear TLV - elemTlv = allocate_int_linear_tlv(ctlMin, ctlMax); } + + elemTlv = allocate_int_dbscale_tlv(min, max, (ctlMax - ctlMin)); + break; case SND_CTL_ELEM_TYPE_ENUMERATED: |