ALSA: usbmixer - add possibility to remap dB values

USB devices tends to represent dB ranges in different way than ALSA expects.
Add possibility to override these values and add guessed values for
SoundBlaster MP3+.

Also rename 'Capture Input Source' control to 'Capture Source' for
SoundBlaster MP3+ and Extigy.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 17 insertions, 6 deletions

diff --git a/sound/usb/usbmixer_maps.c b/sound/usb/usbmixer_maps.c
index 77c3588..79e903a 100644
--- a/sound/usb/usbmixer_maps.c
+++ b/sound/usb/usbmixer_maps.c
@@ -19,11 +19,16 @@
  *
  */
 
+struct usbmix_dB_map {
+	u32 min;
+	u32 max;
+};
 
 struct usbmix_name_map {
 	int id;
 	const char *name;
 	int control;
+	struct usbmix_dB_map *dB;
 };
 
 struct usbmix_selector_map {
@@ -72,7 +77,7 @@ static struct usbmix_name_map extigy_map[] = {
 	{ 8, "Line Playback" }, /* FU */
 	/* 9: IT mic */
 	{ 10, "Mic Playback" }, /* FU */
-	{ 11, "Capture Input Source" }, /* SU */
+	{ 11, "Capture Source" }, /* SU */
 	{ 12, "Capture" }, /* FU */
 	/* 13: OT pcm capture */
 	/* 14: MU (w/o controls) */
@@ -102,6 +107,9 @@ static struct usbmix_name_map extigy_map[] = {
  * e.g. no Master and fake PCM volume
  *			Pavel Mihaylov <bin@bash.info>
  */
+static struct usbmix_dB_map mp3plus_dB_1 = {-4781, 0};	/* just guess */
+static struct usbmix_dB_map mp3plus_dB_2 = {-1781, 618}; /* just guess */
+
 static struct usbmix_name_map mp3plus_map[] = {
 	/* 1: IT pcm */
 	/* 2: IT mic */
@@ -110,16 +118,19 @@ static struct usbmix_name_map mp3plus_map[] = {
 	/* 5: OT digital out */
 	/* 6: OT speaker */
 	/* 7: OT pcm capture */
-	{ 8, "Capture Input Source" }, /* FU, default PCM Capture Source */
+	{ 8, "Capture Source" }, /* FU, default PCM Capture Source */
 		/* (Mic, Input 1 = Line input, Input 2 = Optical input) */
 	{ 9, "Master Playback" }, /* FU, default Speaker 1 */
 	/* { 10, "Mic Capture", 1 }, */ /* FU, Mic Capture */
-	/* { 10, "Mic Capture", 2 }, */ /* FU, Mic Capture */
+	{ 10, /* "Mic Capture", */ NULL, 2, .dB = &mp3plus_dB_2 },
+		/* FU, Mic Capture */
 	{ 10, "Mic Boost", 7 }, /* FU, default Auto Gain Input */
-	{ 11, "Line Capture" }, /* FU, default PCM Capture */
+	{ 11, "Line Capture", .dB = &mp3plus_dB_2 },
+		/* FU, default PCM Capture */
 	{ 12, "Digital In Playback" }, /* FU, default PCM 1 */
-	/* { 13, "Mic Playback" }, */ /* FU, default Mic Playback */
-	{ 14, "Line Playback" }, /* FU, default Speaker */
+	{ 13, /* "Mic Playback", */ .dB = &mp3plus_dB_1 },
+		/* FU, default Mic Playback */
+	{ 14, "Line Playback", .dB = &mp3plus_dB_1 }, /* FU, default Speaker */
 	/* 15: MU */
 	{ 0 } /* terminator */
 };