ALSA: emux: More constifications

Apply const prefix to each possible place: the MIDI data definitions,
the static tables for volume parameters, etc.

Just for minor optimization and no functional changes.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

Author: tiwai

sound/synth/emux/emux_nrpn.c

@@ -63,7 +63,7 @@ static int send_converted_effect(const struct nrpn_conv_table *table,
 /* effect sensitivities for GS NRPN:
  *  adjusted for chaos 8MB soundfonts
  */
-static int gs_sense[] = 
+static const int gs_sense[] =
 {
 	DEF_FX_CUTOFF, DEF_FX_RESONANCE, DEF_FX_ATTACK, DEF_FX_RELEASE,
 	DEF_FX_VIBRATE, DEF_FX_VIBDEPTH, DEF_FX_VIBDELAY
@@ -72,7 +72,7 @@ static int gs_sense[] =
 /* effect sensitivies for XG controls:
  * adjusted for chaos 8MB soundfonts
  */
-static int xg_sense[] = 
+static const int xg_sense[] =
 {
 	DEF_FX_CUTOFF, DEF_FX_RESONANCE, DEF_FX_ATTACK, DEF_FX_RELEASE,
 	DEF_FX_VIBRATE, DEF_FX_VIBDEPTH, DEF_FX_VIBDELAY

sound/synth/emux/emux_synth.c

@@ -529,7 +529,7 @@ update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update)
 
 #if 0 // not used
 /* table for volume target calculation */
-static unsigned short voltarget[16] = { 
+static const unsigned short voltarget[16] = {
 	0xEAC0, 0xE0C8, 0xD740, 0xCE20, 0xC560, 0xBD08, 0xB500, 0xAD58,
 	0xA5F8, 0x9EF0, 0x9830, 0x91C0, 0x8B90, 0x85A8, 0x8000, 0x7A90
 };
@@ -616,7 +616,7 @@ setup_voice(struct snd_emux_voice *vp)
 /*
  * calculate pitch parameter
  */
-static unsigned char pan_volumes[256] = {
+static const unsigned char pan_volumes[256] = {
 0x00,0x03,0x06,0x09,0x0c,0x0f,0x12,0x14,0x17,0x1a,0x1d,0x20,0x22,0x25,0x28,0x2a,
 0x2d,0x30,0x32,0x35,0x37,0x3a,0x3c,0x3f,0x41,0x44,0x46,0x49,0x4b,0x4d,0x50,0x52,
 0x54,0x57,0x59,0x5b,0x5d,0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6f,0x71,0x73,0x75,
@@ -684,7 +684,7 @@ calc_pan(struct snd_emux_voice *vp)
  */
 
 /* tables for volume->attenuation calculation */
-static unsigned char voltab1[128] = {
+static const unsigned char voltab1[128] = {
    0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
    0x63, 0x2b, 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22,
    0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a,
@@ -700,7 +700,7 @@ static unsigned char voltab1[128] = {
    0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 };
 
-static unsigned char voltab2[128] = {
+static const unsigned char voltab2[128] = {
    0x32, 0x31, 0x30, 0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x2a,
    0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x24, 0x23, 0x22, 0x21,
    0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1c, 0x1b, 0x1a,
@@ -716,7 +716,7 @@ static unsigned char voltab2[128] = {
    0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
 };
 
-static unsigned char expressiontab[128] = {
+static const unsigned char expressiontab[128] = {
    0x7f, 0x6c, 0x62, 0x5a, 0x54, 0x50, 0x4b, 0x48, 0x45, 0x42,
    0x40, 0x3d, 0x3b, 0x39, 0x38, 0x36, 0x34, 0x33, 0x31, 0x30,
    0x2f, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, 0x27, 0x26, 0x25,

sound/synth/emux/soundfont.c

@@ -751,7 +751,7 @@ load_data(struct snd_sf_list *sflist, const void __user *data, long count)
 
 
 /* log2_tbl[i] = log2(i+128) * 0x10000 */
-static int log_tbl[129] = {
+static const int log_tbl[129] = {
 	0x70000, 0x702df, 0x705b9, 0x7088e, 0x70b5d, 0x70e26, 0x710eb, 0x713aa,
 	0x71663, 0x71918, 0x71bc8, 0x71e72, 0x72118, 0x723b9, 0x72655, 0x728ed,
 	0x72b80, 0x72e0e, 0x73098, 0x7331d, 0x7359e, 0x7381b, 0x73a93, 0x73d08,
@@ -857,7 +857,7 @@ calc_gus_envelope_time(int rate, int start, int end)
 /* convert envelope time parameter to soundfont parameters */
 
 /* attack & decay/release time table (msec) */
-static short attack_time_tbl[128] = {
+static const short attack_time_tbl[128] = {
 32767, 32767, 5989, 4235, 2994, 2518, 2117, 1780, 1497, 1373, 1259, 1154, 1058, 970, 890, 816,
 707, 691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377,
 361, 345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188,
@@ -868,7 +868,7 @@ static short attack_time_tbl[128] = {
 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 0,
 };
 
-static short decay_time_tbl[128] = {
+static const short decay_time_tbl[128] = {
 32767, 32767, 22614, 15990, 11307, 9508, 7995, 6723, 5653, 5184, 4754, 4359, 3997, 3665, 3361, 3082,
 2828, 2765, 2648, 2535, 2428, 2325, 2226, 2132, 2042, 1955, 1872, 1793, 1717, 1644, 1574, 1507,
 1443, 1382, 1324, 1267, 1214, 1162, 1113, 1066, 978, 936, 897, 859, 822, 787, 754, 722,
@@ -891,7 +891,7 @@ snd_sf_calc_parm_hold(int msec)
 
 /* search an index for specified time from given time table */
 static int
-calc_parm_search(int msec, short *table)
+calc_parm_search(int msec, const short *table)
 {
 	int left = 1, right = 127, mid;
 	while (left < right) {