From: Clemens Ladisch Date: Mon, 10 Jan 2011 15:25:44 +0000 (+0100) Subject: ALSA: core, oxygen, virtuoso: add an enum control info helper X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9600732b6caba595f34acf2abd930098ec9a0b2b;p=openwrt%2Fstaging%2Fblogic.git ALSA: core, oxygen, virtuoso: add an enum control info helper Introduce the helper function snd_ctl_enum_info() to fill out the elem_info fields for an enumerated control. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai --- diff --git a/include/sound/control.h b/include/sound/control.h index 112374dc0c58..7715e6f00d38 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -160,12 +160,14 @@ static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id } /* - * Frequently used control callbacks + * Frequently used control callbacks/helpers */ int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo); int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo); +int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels, + unsigned int items, const char *const names[]); /* * virtual master control diff --git a/sound/core/control.c b/sound/core/control.c index 45a818002d99..9ce00ed20fba 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -1488,7 +1488,7 @@ int snd_ctl_create(struct snd_card *card) } /* - * Frequently used control callbacks + * Frequently used control callbacks/helpers */ int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) @@ -1513,3 +1513,29 @@ int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol, } EXPORT_SYMBOL(snd_ctl_boolean_stereo_info); + +/** + * snd_ctl_enum_info - fills the info structure for an enumerated control + * @info: the structure to be filled + * @channels: the number of the control's channels; often one + * @items: the number of control values; also the size of @names + * @names: an array containing the names of all control values + * + * Sets all required fields in @info to their appropriate values. + * If the control's accessibility is not the default (readable and writable), + * the caller has to fill @info->access. + */ +int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels, + unsigned int items, const char *const names[]) +{ + info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + info->count = channels; + info->value.enumerated.items = items; + if (info->value.enumerated.item >= items) + info->value.enumerated.item = items - 1; + strlcpy(info->value.enumerated.name, + names[info->value.enumerated.item], + sizeof(info->value.enumerated.name)); + return 0; +} +EXPORT_SYMBOL(snd_ctl_enum_info); diff --git a/sound/pci/oxygen/oxygen.c b/sound/pci/oxygen/oxygen.c index b59aeefd14db..45427d85045e 100644 --- a/sound/pci/oxygen/oxygen.c +++ b/sound/pci/oxygen/oxygen.c @@ -415,13 +415,7 @@ static int rolloff_info(struct snd_kcontrol *ctl, "Sharp Roll-off", "Slow Roll-off" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - if (info->value.enumerated.item >= 2) - info->value.enumerated.item = 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int rolloff_get(struct snd_kcontrol *ctl, @@ -473,13 +467,7 @@ static int hpf_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info) "None", "High-pass Filter" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - if (info->value.enumerated.item >= 2) - info->value.enumerated.item = 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int hpf_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value) diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c index d327c36fbddf..821df1c9d1d0 100644 --- a/sound/pci/oxygen/oxygen_mixer.c +++ b/sound/pci/oxygen/oxygen_mixer.c @@ -119,13 +119,7 @@ static int upmix_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info) struct oxygen *chip = ctl->private_data; unsigned int count = upmix_item_count(chip); - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = count; - if (info->value.enumerated.item >= count) - info->value.enumerated.item = count - 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, count, names); } static int upmix_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value) @@ -659,12 +653,7 @@ static int mic_fmic_source_info(struct snd_kcontrol *ctl, { static const char *const names[] = { "Mic Jack", "Front Panel" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - info->value.enumerated.item &= 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int mic_fmic_source_get(struct snd_kcontrol *ctl, diff --git a/sound/pci/oxygen/xonar_cs43xx.c b/sound/pci/oxygen/xonar_cs43xx.c index 55c52c7e19b2..9f72d424969c 100644 --- a/sound/pci/oxygen/xonar_cs43xx.c +++ b/sound/pci/oxygen/xonar_cs43xx.c @@ -298,13 +298,7 @@ static int rolloff_info(struct snd_kcontrol *ctl, "Fast Roll-off", "Slow Roll-off" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - if (info->value.enumerated.item >= 2) - info->value.enumerated.item = 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int rolloff_get(struct snd_kcontrol *ctl, diff --git a/sound/pci/oxygen/xonar_dg.c b/sound/pci/oxygen/xonar_dg.c index 7ed3284d7d5b..cc610ac1fc19 100644 --- a/sound/pci/oxygen/xonar_dg.c +++ b/sound/pci/oxygen/xonar_dg.c @@ -213,13 +213,7 @@ static int output_switch_info(struct snd_kcontrol *ctl, "Speakers", "Headphones", "FP Headphones" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 3; - if (info->value.enumerated.item >= 3) - info->value.enumerated.item = 2; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 3, names); } static int output_switch_get(struct snd_kcontrol *ctl, @@ -276,13 +270,7 @@ static int hp_volume_offset_info(struct snd_kcontrol *ctl, "< 64 ohms", "64-150 ohms", "150-300 ohms" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 3; - if (info->value.enumerated.item >= 3) - info->value.enumerated.item = 2; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 3, names); } static int hp_volume_offset_get(struct snd_kcontrol *ctl, @@ -390,12 +378,7 @@ static int input_sel_info(struct snd_kcontrol *ctl, "Mic", "Aux", "Front Mic", "Line" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 4; - info->value.enumerated.item &= 3; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 4, names); } static int input_sel_get(struct snd_kcontrol *ctl, @@ -453,12 +436,7 @@ static int hpf_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info) { static const char *const names[2] = { "Active", "Frozen" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - info->value.enumerated.item &= 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int hpf_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value) diff --git a/sound/pci/oxygen/xonar_pcm179x.c b/sound/pci/oxygen/xonar_pcm179x.c index bf4fd4bb1359..54cad38ec30a 100644 --- a/sound/pci/oxygen/xonar_pcm179x.c +++ b/sound/pci/oxygen/xonar_pcm179x.c @@ -678,13 +678,7 @@ static int rolloff_info(struct snd_kcontrol *ctl, "Sharp Roll-off", "Slow Roll-off" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - if (info->value.enumerated.item >= 2) - info->value.enumerated.item = 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int rolloff_get(struct snd_kcontrol *ctl, @@ -748,13 +742,7 @@ static int st_output_switch_info(struct snd_kcontrol *ctl, "Speakers", "Headphones", "FP Headphones" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 3; - if (info->value.enumerated.item >= 3) - info->value.enumerated.item = 2; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 3, names); } static int st_output_switch_get(struct snd_kcontrol *ctl, @@ -809,13 +797,7 @@ static int st_hp_volume_offset_info(struct snd_kcontrol *ctl, "< 64 ohms", "64-300 ohms", "300-600 ohms" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 3; - if (info->value.enumerated.item > 2) - info->value.enumerated.item = 2; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 3, names); } static int st_hp_volume_offset_get(struct snd_kcontrol *ctl, diff --git a/sound/pci/oxygen/xonar_wm87x6.c b/sound/pci/oxygen/xonar_wm87x6.c index ad48356c54e4..42d1ab136217 100644 --- a/sound/pci/oxygen/xonar_wm87x6.c +++ b/sound/pci/oxygen/xonar_wm87x6.c @@ -577,11 +577,6 @@ static int wm8776_field_enum_info(struct snd_kcontrol *ctl, const char *const *names; max = (ctl->private_value >> 12) & 0xf; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = max + 1; - if (info->value.enumerated.item > max) - info->value.enumerated.item = max; switch ((ctl->private_value >> 24) & 0x1f) { case WM8776_ALCCTRL2: names = hld; @@ -605,8 +600,7 @@ static int wm8776_field_enum_info(struct snd_kcontrol *ctl, default: return -ENXIO; } - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, max + 1, names); } static int wm8776_field_volume_info(struct snd_kcontrol *ctl, @@ -863,13 +857,8 @@ static int wm8776_level_control_info(struct snd_kcontrol *ctl, static const char *const names[3] = { "None", "Peak Limiter", "Automatic Level Control" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 3; - if (info->value.enumerated.item >= 3) - info->value.enumerated.item = 2; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + + return snd_ctl_enum_info(info, 1, 3, names); } static int wm8776_level_control_get(struct snd_kcontrol *ctl, @@ -955,13 +944,7 @@ static int hpf_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info) "None", "High-pass Filter" }; - info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; - info->count = 1; - info->value.enumerated.items = 2; - if (info->value.enumerated.item >= 2) - info->value.enumerated.item = 1; - strcpy(info->value.enumerated.name, names[info->value.enumerated.item]); - return 0; + return snd_ctl_enum_info(info, 1, 2, names); } static int hpf_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)