Commit eccfc1b8 authored by Ruslan Bilovol's avatar Ruslan Bilovol Committed by Takashi Iwai
Browse files

ALSA: usb: mixer: make string parsing independent of mixer_build state 



Functions like snd_usb_copy_string_desc() or
get_term_name() don't actually need mixer_build
state but can use snd_usb_audio structure instead
to get usb device.

This patch has no functional change but prepares
to future UAC3 BADD profiles support which don't
have class-specific descriptors so won't have
mixer_build state.

Signed-off-by: default avatarRuslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3763f618

sound/usb/mixer.c

+16 −14
Original line number Diff line number Diff line
@@ -201,10 +201,10 @@ static void *find_audio_control_unit(struct mixer_build *state, 
/*

 * copy a string with the given id

 */

static int snd_usb_copy_string_desc(struct mixer_build *state,

static int snd_usb_copy_string_desc(struct snd_usb_audio *chip,

				    int index, char *buf, int maxlen)

{

	int len = usb_string(state->chip->dev, index, buf, maxlen - 1);

	int len = usb_string(chip->dev, index, buf, maxlen - 1);



	if (len < 0)

		return 0;
@@ -658,14 +658,14 @@ static struct iterm_name_combo { 
	{ 0 },

};



static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,

static int get_term_name(struct snd_usb_audio *chip, struct usb_audio_term *iterm,

			 unsigned char *name, int maxlen, int term_only)

{

	struct iterm_name_combo *names;

	int len;



	if (iterm->name) {

		len = snd_usb_copy_string_desc(state, iterm->name,

		len = snd_usb_copy_string_desc(chip, iterm->name,

						name, maxlen);

		if (len)

			return len;
@@ -1407,7 +1407,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 
	len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));

	mapped_name = len != 0;

	if (!len && nameid)

		len = snd_usb_copy_string_desc(state, nameid,

		len = snd_usb_copy_string_desc(state->chip, nameid,

				kctl->id.name, sizeof(kctl->id.name));



	switch (control) {
@@ -1422,10 +1422,10 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 
		 * - otherwise, anonymous name.

		 */

		if (!len) {

			len = get_term_name(state, iterm, kctl->id.name,

			len = get_term_name(state->chip, iterm, kctl->id.name,

					    sizeof(kctl->id.name), 1);

			if (!len)

				len = get_term_name(state, &state->oterm,

				len = get_term_name(state->chip, &state->oterm,

						    kctl->id.name,

						    sizeof(kctl->id.name), 1);

			if (!len)
@@ -1498,7 +1498,7 @@ static void get_connector_control_name(struct mixer_build *state, 
				       struct usb_audio_term *term,

				       bool is_input, char *name, int name_size)

{

	int name_len = get_term_name(state, term, name, name_size, 0);

	int name_len = get_term_name(state->chip, term, name, name_size, 0);



	if (name_len == 0)

		strlcpy(name, "Unknown", name_size);
@@ -1597,7 +1597,7 @@ static int parse_clock_source_unit(struct mixer_build *state, int unitid, 
	}



	kctl->private_free = snd_usb_mixer_elem_free;

	ret = snd_usb_copy_string_desc(state, hdr->iClockSource,

	ret = snd_usb_copy_string_desc(state->chip, hdr->iClockSource,

				       name, sizeof(name));

	if (ret > 0)

		snprintf(kctl->id.name, sizeof(kctl->id.name),
@@ -1840,7 +1840,7 @@ static void build_mixer_unit_ctl(struct mixer_build *state, 


	len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));

	if (!len)

		len = get_term_name(state, iterm, kctl->id.name,

		len = get_term_name(state->chip, iterm, kctl->id.name,

				    sizeof(kctl->id.name), 0);

	if (!len)

		len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
@@ -2154,7 +2154,8 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, 
			nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);

			len = 0;

			if (nameid)

				len = snd_usb_copy_string_desc(state, nameid,

				len = snd_usb_copy_string_desc(state->chip,

							       nameid,

							       kctl->id.name,

							       sizeof(kctl->id.name));

			if (!len)
@@ -2350,7 +2351,8 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, 
		len = check_mapped_selector_name(state, unitid, i, namelist[i],

						 MAX_ITEM_NAME_LEN);

		if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)

			len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);

			len = get_term_name(state->chip, &iterm, namelist[i],

					    MAX_ITEM_NAME_LEN, 0);

		if (! len)

			sprintf(namelist[i], "Input %u", i);

	}
@@ -2372,12 +2374,12 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, 
		/* if iSelector is given, use it */

		nameid = uac_selector_unit_iSelector(desc);

		if (nameid)

			len = snd_usb_copy_string_desc(state, nameid,

			len = snd_usb_copy_string_desc(state->chip, nameid,

						       kctl->id.name,

						       sizeof(kctl->id.name));

		/* ... or pick up the terminal name at next */

		if (!len)

			len = get_term_name(state, &state->oterm,

			len = get_term_name(state->chip, &state->oterm,

				    kctl->id.name, sizeof(kctl->id.name), 0);

		/* ... or use the fixed string "USB" as the last resort */

		if (!len)

CRA Git | Maintained and supported by SUSTech CRA and CCSE