mirror of https://gitee.com/openkylin/linux.git
ALSA: usb-audio: Tidy up mixer_us16x08.c
A few more cleanups and improvements that have been overlooked: - Use ARRAY_SIZE() macro appropriately - Code shuffling for minor optimization - Omit superfluous variable initializations - Get rid of superfluous NULL checks - Add const to snd_us16x08_control_params definitions No functional changes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
parent
e2810d76c5
commit
7086b7b3d1
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@ -176,15 +176,9 @@ static int snd_us16x08_recv_urb(struct snd_usb_audio *chip,
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*/
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static int snd_us16x08_send_urb(struct snd_usb_audio *chip, char *buf, int size)
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{
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int err = 0;
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if (chip) {
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err = snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
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return snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
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SND_US16X08_URB_REQUEST, SND_US16X08_URB_REQUESTTYPE,
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0, 0, buf, size);
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}
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return err;
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}
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static int snd_us16x08_route_info(struct snd_kcontrol *kcontrol,
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@ -212,10 +206,7 @@ static int snd_us16x08_route_put(struct snd_kcontrol *kcontrol,
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struct snd_usb_audio *chip = elem->head.mixer->chip;
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int index = ucontrol->id.index;
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char buf[sizeof(route_msg)];
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int val, val_org, err = 0;
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/* prepare the message buffer from template */
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memcpy(buf, route_msg, sizeof(route_msg));
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int val, val_org, err;
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/* get the new value (no bias for routes) */
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val = ucontrol->value.enumerated.item[0];
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@ -224,6 +215,9 @@ static int snd_us16x08_route_put(struct snd_kcontrol *kcontrol,
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if (val < 0 || val > 9)
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return -EINVAL;
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/* prepare the message buffer from template */
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memcpy(buf, route_msg, sizeof(route_msg));
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if (val < 2) {
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/* input comes from a master channel */
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val_org = val;
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@ -279,12 +273,9 @@ static int snd_us16x08_master_put(struct snd_kcontrol *kcontrol,
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_usb_audio *chip = elem->head.mixer->chip;
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char buf[sizeof(mix_msg_out)];
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int val, err = 0;
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int val, err;
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int index = ucontrol->id.index;
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/* prepare the message buffer from template */
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memcpy(buf, mix_msg_out, sizeof(mix_msg_out));
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/* new control value incl. bias*/
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val = ucontrol->value.integer.value[0];
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@ -293,6 +284,9 @@ static int snd_us16x08_master_put(struct snd_kcontrol *kcontrol,
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|| val > SND_US16X08_KCMAX(kcontrol))
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return -EINVAL;
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/* prepare the message buffer from template */
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memcpy(buf, mix_msg_out, sizeof(mix_msg_out));
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buf[8] = val - SND_US16X08_KCBIAS(kcontrol);
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buf[6] = elem->head.id;
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@ -392,9 +386,6 @@ static int snd_us16x08_channel_put(struct snd_kcontrol *kcontrol,
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int val, err;
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int index = ucontrol->id.index;
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/* prepare URB message from template */
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memcpy(buf, mix_msg_in, sizeof(mix_msg_in));
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val = ucontrol->value.integer.value[0];
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/* sanity check */
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@ -402,6 +393,9 @@ static int snd_us16x08_channel_put(struct snd_kcontrol *kcontrol,
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|| val > SND_US16X08_KCMAX(kcontrol))
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return -EINVAL;
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/* prepare URB message from template */
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memcpy(buf, mix_msg_in, sizeof(mix_msg_in));
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/* add the bias to the new value */
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buf[8] = val - SND_US16X08_KCBIAS(kcontrol);
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buf[6] = elem->head.id;
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@ -434,8 +428,7 @@ static int snd_us16x08_comp_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_us16x08_comp_store *store =
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((struct snd_us16x08_comp_store *) elem->private_data);
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struct snd_us16x08_comp_store *store = elem->private_data;
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int index = ucontrol->id.index;
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int val_idx = COMP_STORE_IDX(elem->head.id);
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@ -449,18 +442,11 @@ static int snd_us16x08_comp_put(struct snd_kcontrol *kcontrol,
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{
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_usb_audio *chip = elem->head.mixer->chip;
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struct snd_us16x08_comp_store *store =
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((struct snd_us16x08_comp_store *) elem->private_data);
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struct snd_us16x08_comp_store *store = elem->private_data;
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int index = ucontrol->id.index;
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char buf[sizeof(comp_msg)];
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int val_idx, val;
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int err = 0;
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/* prepare compressor URB message from template */
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memcpy(buf, comp_msg, sizeof(comp_msg));
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/* new control value incl. bias*/
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val_idx = elem->head.id - SND_US16X08_ID_COMP_BASE;
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int err;
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val = ucontrol->value.integer.value[0];
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@ -469,8 +455,14 @@ static int snd_us16x08_comp_put(struct snd_kcontrol *kcontrol,
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|| val > SND_US16X08_KCMAX(kcontrol))
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return -EINVAL;
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/* new control value incl. bias*/
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val_idx = elem->head.id - SND_US16X08_ID_COMP_BASE;
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store->val[val_idx][index] = ucontrol->value.integer.value[0];
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/* prepare compressor URB message from template */
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memcpy(buf, comp_msg, sizeof(comp_msg));
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/* place comp values in message buffer watch bias! */
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buf[8] = store->val[
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COMP_STORE_IDX(SND_US16X08_ID_COMP_THRESHOLD)][index]
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@ -502,10 +494,9 @@ static int snd_us16x08_comp_put(struct snd_kcontrol *kcontrol,
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static int snd_us16x08_eqswitch_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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int val = 0;
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int val;
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_us16x08_eq_store *store =
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((struct snd_us16x08_eq_store *) elem->private_data);
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struct snd_us16x08_eq_store *store = elem->private_data;
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int index = ucontrol->id.index;
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/* get low switch from cache is enough, cause all bands are together */
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@ -521,10 +512,8 @@ static int snd_us16x08_eqswitch_put(struct snd_kcontrol *kcontrol,
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{
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_usb_audio *chip = elem->head.mixer->chip;
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struct snd_us16x08_eq_store *store =
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((struct snd_us16x08_eq_store *) elem->private_data);
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struct snd_us16x08_eq_store *store = elem->private_data;
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int index = ucontrol->id.index;
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char buf[sizeof(eqs_msq)];
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int val, err = 0;
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int b_idx;
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@ -564,10 +553,9 @@ static int snd_us16x08_eqswitch_put(struct snd_kcontrol *kcontrol,
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static int snd_us16x08_eq_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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int val = 0;
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int val;
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_us16x08_eq_store *store =
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((struct snd_us16x08_eq_store *) elem->private_data);
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struct snd_us16x08_eq_store *store = elem->private_data;
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int index = ucontrol->id.index;
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int b_idx = EQ_STORE_BAND_IDX(elem->head.id) - 1;
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int p_idx = EQ_STORE_PARAM_IDX(elem->head.id);
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@ -584,17 +572,13 @@ static int snd_us16x08_eq_put(struct snd_kcontrol *kcontrol,
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{
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struct usb_mixer_elem_info *elem = kcontrol->private_data;
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struct snd_usb_audio *chip = elem->head.mixer->chip;
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struct snd_us16x08_eq_store *store =
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((struct snd_us16x08_eq_store *) elem->private_data);
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struct snd_us16x08_eq_store *store = elem->private_data;
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int index = ucontrol->id.index;
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char buf[sizeof(eqs_msq)];
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int val, err = 0;
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int val, err;
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int b_idx = EQ_STORE_BAND_IDX(elem->head.id) - 1;
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int p_idx = EQ_STORE_PARAM_IDX(elem->head.id);
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/* copy URB buffer from EQ template */
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memcpy(buf, eqs_msq, sizeof(eqs_msq));
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val = ucontrol->value.integer.value[0];
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/* sanity check */
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@ -602,6 +586,9 @@ static int snd_us16x08_eq_put(struct snd_kcontrol *kcontrol,
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|| val > SND_US16X08_KCMAX(kcontrol))
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return -EINVAL;
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/* copy URB buffer from EQ template */
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memcpy(buf, eqs_msq, sizeof(eqs_msq));
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store->val[b_idx][p_idx][index] = val;
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buf[20] = store->val[b_idx][3][index];
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buf[17] = store->val[b_idx][2][index];
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@ -713,12 +700,6 @@ static int snd_us16x08_meter_get(struct snd_kcontrol *kcontrol,
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u8 meter_urb[64];
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char tmp[sizeof(mix_init_msg2)] = {0};
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if (elem) {
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store = (struct snd_us16x08_meter_store *) elem->private_data;
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chip = elem->head.mixer->chip;
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} else
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return 0;
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switch (kcontrol->private_value) {
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case 0:
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snd_us16x08_send_urb(chip, (char *)mix_init_msg1,
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@ -983,11 +964,11 @@ static struct snd_kcontrol_new snd_us16x08_meter_ctl = {
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/* setup compressor store and assign default value */
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static struct snd_us16x08_comp_store *snd_us16x08_create_comp_store(void)
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{
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int i = 0;
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struct snd_us16x08_comp_store *tmp =
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kmalloc(sizeof(struct snd_us16x08_comp_store), GFP_KERNEL);
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int i;
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struct snd_us16x08_comp_store *tmp;
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if (tmp == NULL)
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tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
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if (!tmp)
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return NULL;
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for (i = 0; i < SND_US16X08_MAX_CHANNELS; i++) {
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@ -1006,10 +987,10 @@ static struct snd_us16x08_comp_store *snd_us16x08_create_comp_store(void)
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static struct snd_us16x08_eq_store *snd_us16x08_create_eq_store(void)
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{
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int i, b_idx;
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struct snd_us16x08_eq_store *tmp =
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kmalloc(sizeof(struct snd_us16x08_eq_store), GFP_KERNEL);
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struct snd_us16x08_eq_store *tmp;
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if (tmp == NULL)
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tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
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if (!tmp)
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return NULL;
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for (i = 0; i < SND_US16X08_MAX_CHANNELS; i++) {
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@ -1042,15 +1023,14 @@ static struct snd_us16x08_eq_store *snd_us16x08_create_eq_store(void)
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static struct snd_us16x08_meter_store *snd_us16x08_create_meter_store(void)
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{
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struct snd_us16x08_meter_store *tmp =
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kzalloc(sizeof(struct snd_us16x08_meter_store), GFP_KERNEL);
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struct snd_us16x08_meter_store *tmp;
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tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
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if (!tmp)
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return NULL;
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tmp->comp_index = 1;
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tmp->comp_active_index = 0;
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return tmp;
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}
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/* release elem->private_free as well; called only once for each *_store */
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@ -1067,7 +1047,7 @@ static void elem_private_free(struct snd_kcontrol *kctl)
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static int add_new_ctl(struct usb_mixer_interface *mixer,
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const struct snd_kcontrol_new *ncontrol,
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int index, int val_type, int channels,
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const char *name, const void *opt,
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const char *name, void *opt,
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bool do_private_free,
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struct usb_mixer_elem_info **elem_ret)
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{
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@ -1088,7 +1068,7 @@ static int add_new_ctl(struct usb_mixer_interface *mixer,
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elem->head.id = index;
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elem->val_type = val_type;
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elem->channels = channels;
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elem->private_data = (void *) opt;
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elem->private_data = opt;
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kctl = snd_ctl_new1(ncontrol, elem);
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if (!kctl) {
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@ -1113,10 +1093,8 @@ static int add_new_ctl(struct usb_mixer_interface *mixer,
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return 0;
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}
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static struct snd_us16x08_control_params control_params;
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/* table of EQ controls */
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static struct snd_us16x08_control_params eq_controls[] = {
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static const struct snd_us16x08_control_params eq_controls[] = {
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{ /* EQ switch */
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.kcontrol_new = &snd_us16x08_eq_switch_ctl,
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.control_id = SND_US16X08_ID_EQENABLE,
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@ -1197,7 +1175,7 @@ static struct snd_us16x08_control_params eq_controls[] = {
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};
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/* table of compressor controls */
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static struct snd_us16x08_control_params comp_controls[] = {
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static const struct snd_us16x08_control_params comp_controls[] = {
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{ /* Comp enable */
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.kcontrol_new = &snd_us16x08_compswitch_ctl,
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.control_id = SND_US16X08_ID_COMP_SWITCH,
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@ -1243,7 +1221,7 @@ static struct snd_us16x08_control_params comp_controls[] = {
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};
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/* table of channel controls */
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static struct snd_us16x08_control_params channel_controls[] = {
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static const struct snd_us16x08_control_params channel_controls[] = {
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{ /* Phase */
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.kcontrol_new = &snd_us16x08_ch_boolean_ctl,
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.control_id = SND_US16X08_ID_PHASE,
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@ -1279,7 +1257,7 @@ static struct snd_us16x08_control_params channel_controls[] = {
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};
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/* table of master controls */
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static struct snd_us16x08_control_params master_controls[] = {
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static const struct snd_us16x08_control_params master_controls[] = {
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{ /* Master */
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.kcontrol_new = &snd_us16x08_master_ctl,
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.control_id = SND_US16X08_ID_FADER,
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@ -1347,10 +1325,7 @@ int snd_us16x08_controls_create(struct usb_mixer_interface *mixer)
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return -ENOMEM;
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/* add master controls */
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for (i = 0;
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i < sizeof(master_controls)
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/ sizeof(control_params);
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i++) {
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for (i = 0; i < ARRAY_SIZE(master_controls); i++) {
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err = add_new_ctl(mixer,
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master_controls[i].kcontrol_new,
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@ -1368,10 +1343,7 @@ int snd_us16x08_controls_create(struct usb_mixer_interface *mixer)
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}
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/* add channel controls */
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for (i = 0;
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i < sizeof(channel_controls)
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/ sizeof(control_params);
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i++) {
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for (i = 0; i < ARRAY_SIZE(channel_controls); i++) {
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err = add_new_ctl(mixer,
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channel_controls[i].kcontrol_new,
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@ -1396,8 +1368,7 @@ int snd_us16x08_controls_create(struct usb_mixer_interface *mixer)
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return -ENOMEM;
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/* add EQ controls */
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for (i = 0; i < sizeof(eq_controls) /
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sizeof(control_params); i++) {
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for (i = 0; i < ARRAY_SIZE(eq_controls); i++) {
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err = add_new_ctl(mixer,
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eq_controls[i].kcontrol_new,
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@ -1413,10 +1384,7 @@ int snd_us16x08_controls_create(struct usb_mixer_interface *mixer)
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}
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/* add compressor controls */
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for (i = 0;
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i < sizeof(comp_controls)
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/ sizeof(control_params);
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i++) {
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for (i = 0; i < ARRAY_SIZE(comp_controls); i++) {
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err = add_new_ctl(mixer,
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comp_controls[i].kcontrol_new,
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