mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-03 09:01:52 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Add dB range information to PCM softvol plugin

Browse source 
Added the dB range information to PCM softvol plugin.
Also, fixed the coefficient table to match with the
accurate dB step 0.20dB.
This commit is contained in:
Takashi Iwai 2006-08-25 11:46:19 +02:00
parent d5caee8d36
commit 5c71dd3ee7
2 changed files with 53 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/control/control.c
View file

@ -283,6 +283,8 @@ int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
snd_ctl_elem_info_alloca(&info);
info->id = *id;
info->type = SND_CTL_ELEM_TYPE_INTEGER;
info->access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE;
info->count = count;
info->value.integer.min = min;
info->value.integer.max = max;

85
src/pcm/pcm_softvol.c
View file

@ -54,41 +54,41 @@ typedef struct {
#define VOL_SCALE_SHIFT 16
#define PRESET_RESOLUTION 256
#define PRESET_MIN_DB -48.0
#define PRESET_MIN_DB -51.0
static unsigned short preset_dB_value[PRESET_RESOLUTION] = {
0x0000, 0x0104, 0x010a, 0x0110, 0x0116, 0x011c, 0x0122, 0x0129,
0x012f, 0x0136, 0x013d, 0x0144, 0x014b, 0x0152, 0x015a, 0x0161,
0x0169, 0x0171, 0x0179, 0x0181, 0x018a, 0x0193, 0x019c, 0x01a5,
0x01ae, 0x01b7, 0x01c1, 0x01cb, 0x01d5, 0x01df, 0x01ea, 0x01f5,
0x0200, 0x020b, 0x0216, 0x0222, 0x022e, 0x023b, 0x0247, 0x0254,
0x0261, 0x026e, 0x027c, 0x028a, 0x0298, 0x02a7, 0x02b6, 0x02c5,
0x02d5, 0x02e5, 0x02f5, 0x0306, 0x0317, 0x0328, 0x033a, 0x034c,
0x035f, 0x0372, 0x0385, 0x0399, 0x03ad, 0x03c2, 0x03d7, 0x03ed,
0x0403, 0x041a, 0x0431, 0x0448, 0x0460, 0x0479, 0x0492, 0x04ac,
0x04c6, 0x04e1, 0x04fd, 0x0519, 0x0535, 0x0553, 0x0571, 0x058f,
0x05af, 0x05cf, 0x05ef, 0x0611, 0x0633, 0x0656, 0x067a, 0x069e,
0x06c3, 0x06ea, 0x0710, 0x0738, 0x0761, 0x078a, 0x07b5, 0x07e0,
0x080d, 0x083a, 0x0868, 0x0898, 0x08c8, 0x08fa, 0x092c, 0x0960,
0x0995, 0x09cb, 0x0a02, 0x0a3a, 0x0a74, 0x0aae, 0x0aeb, 0x0b28,
0x0b67, 0x0ba7, 0x0be9, 0x0c2c, 0x0c70, 0x0cb6, 0x0cfe, 0x0d47,
0x0d92, 0x0dde, 0x0e2d, 0x0e7c, 0x0ece, 0x0f21, 0x0f76, 0x0fce,
0x1027, 0x1081, 0x10de, 0x113d, 0x119f, 0x1202, 0x1267, 0x12cf,
0x1339, 0x13a5, 0x1414, 0x1485, 0x14f8, 0x156e, 0x15e7, 0x1662,
0x16e0, 0x1761, 0x17e5, 0x186b, 0x18f5, 0x1981, 0x1a11, 0x1aa4,
0x1b3a, 0x1bd3, 0x1c70, 0x1d10, 0x1db4, 0x1e5b, 0x1f06, 0x1fb4,
0x2067, 0x211d, 0x21d8, 0x2297, 0x2359, 0x2420, 0x24ec, 0x25bc,
0x2690, 0x2769, 0x2847, 0x292a, 0x2a12, 0x2aff, 0x2bf1, 0x2ce8,
0x2de5, 0x2ee8, 0x2ff0, 0x30fe, 0x3211, 0x332b, 0x344c, 0x3572,
0x369f, 0x37d2, 0x390d, 0x3a4e, 0x3b96, 0x3ce6, 0x3e3d, 0x3f9b,
0x4101, 0x426f, 0x43e6, 0x4564, 0x46eb, 0x487a, 0x4a12, 0x4bb3,
0x4d5d, 0x4f11, 0x50ce, 0x5295, 0x5466, 0x5642, 0x5827, 0x5a18,
0x5c13, 0x5e19, 0x602b, 0x6249, 0x6472, 0x66a8, 0x68ea, 0x6b39,
0x6d94, 0x6ffd, 0x7274, 0x74f8, 0x778b, 0x7a2c, 0x7cdc, 0x7f9b,
0x826a, 0x8548, 0x8836, 0x8b35, 0x8e45, 0x9166, 0x9499, 0x97de,
0x9b35, 0x9e9f, 0xa21c, 0xa5ad, 0xa952, 0xad0b, 0xb0da, 0xb4bd,
0xb8b7, 0xbcc7, 0xc0ee, 0xc52d, 0xc983, 0xcdf1, 0xd279, 0xd71a,
0xdbd5, 0xe0ab, 0xe59c, 0xeaa9, 0xefd3, 0xf519, 0xfa7d, 0xffff,
0x00b8, 0x00bd, 0x00c1, 0x00c5, 0x00ca, 0x00cf, 0x00d4, 0x00d9,
0x00de, 0x00e3, 0x00e8, 0x00ed, 0x00f3, 0x00f9, 0x00fe, 0x0104,
0x010a, 0x0111, 0x0117, 0x011e, 0x0124, 0x012b, 0x0132, 0x0139,
0x0140, 0x0148, 0x0150, 0x0157, 0x015f, 0x0168, 0x0170, 0x0179,
0x0181, 0x018a, 0x0194, 0x019d, 0x01a7, 0x01b0, 0x01bb, 0x01c5,
0x01cf, 0x01da, 0x01e5, 0x01f1, 0x01fc, 0x0208, 0x0214, 0x0221,
0x022d, 0x023a, 0x0248, 0x0255, 0x0263, 0x0271, 0x0280, 0x028f,
0x029e, 0x02ae, 0x02be, 0x02ce, 0x02df, 0x02f0, 0x0301, 0x0313,
0x0326, 0x0339, 0x034c, 0x035f, 0x0374, 0x0388, 0x039d, 0x03b3,
0x03c9, 0x03df, 0x03f7, 0x040e, 0x0426, 0x043f, 0x0458, 0x0472,
0x048d, 0x04a8, 0x04c4, 0x04e0, 0x04fd, 0x051b, 0x053a, 0x0559,
0x0579, 0x0599, 0x05bb, 0x05dd, 0x0600, 0x0624, 0x0648, 0x066e,
0x0694, 0x06bb, 0x06e3, 0x070c, 0x0737, 0x0762, 0x078e, 0x07bb,
0x07e9, 0x0818, 0x0848, 0x087a, 0x08ac, 0x08e0, 0x0915, 0x094b,
0x0982, 0x09bb, 0x09f5, 0x0a30, 0x0a6d, 0x0aab, 0x0aeb, 0x0b2c,
0x0b6f, 0x0bb3, 0x0bf9, 0x0c40, 0x0c89, 0x0cd4, 0x0d21, 0x0d6f,
0x0dbf, 0x0e11, 0x0e65, 0x0ebb, 0x0f12, 0x0f6c, 0x0fc8, 0x1026,
0x1087, 0x10e9, 0x114e, 0x11b5, 0x121f, 0x128b, 0x12fa, 0x136b,
0x13df, 0x1455, 0x14ce, 0x154a, 0x15c9, 0x164b, 0x16d0, 0x1758,
0x17e4, 0x1872, 0x1904, 0x1999, 0x1a32, 0x1ace, 0x1b6e, 0x1c11,
0x1cb9, 0x1d64, 0x1e13, 0x1ec7, 0x1f7e, 0x203a, 0x20fa, 0x21bf,
0x2288, 0x2356, 0x2429, 0x2500, 0x25dd, 0x26bf, 0x27a6, 0x2892,
0x2984, 0x2a7c, 0x2b79, 0x2c7c, 0x2d85, 0x2e95, 0x2fab, 0x30c7,
0x31ea, 0x3313, 0x3444, 0x357c, 0x36bb, 0x3801, 0x394f, 0x3aa5,
0x3c02, 0x3d68, 0x3ed6, 0x404d, 0x41cd, 0x4355, 0x44e6, 0x4681,
0x4826, 0x49d4, 0x4b8c, 0x4d4f, 0x4f1c, 0x50f3, 0x52d6, 0x54c4,
0x56be, 0x58c3, 0x5ad4, 0x5cf2, 0x5f1c, 0x6153, 0x6398, 0x65e9,
0x6849, 0x6ab7, 0x6d33, 0x6fbf, 0x7259, 0x7503, 0x77bd, 0x7a87,
0x7d61, 0x804d, 0x834a, 0x8659, 0x897a, 0x8cae, 0x8ff5, 0x934f,
0x96bd, 0x9a40, 0x9dd8, 0xa185, 0xa548, 0xa922, 0xad13, 0xb11b,
0xb53b, 0xb973, 0xbdc5, 0xc231, 0xc6b7, 0xcb58, 0xd014, 0xd4ed,
0xd9e3, 0xdef6, 0xe428, 0xe978, 0xeee8, 0xf479, 0xfa2b, 0xffff,
};
/* (32bit x 16bit) >> 16 */
@ -548,6 +548,16 @@ static void snd_pcm_softvol_dump(snd_pcm_t *pcm, snd_output_t *out)
snd_pcm_dump(svol->plug.gen.slave, out);
}
static int add_tlv_info(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo)
{
unsigned int tlv[4];
tlv[0] = SND_CTL_TLVT_DB_SCALE;
tlv[1] = 2 * sizeof(int);
tlv[2] = svol->min_dB * 100;
tlv[3] = -svol->min_dB * 100 / svol->max_val;
return snd_ctl_elem_tlv_write(svol->ctl, &cinfo->id, tlv);
}
static int add_user_ctl(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo, int count)
{
int err;
@ -556,6 +566,7 @@ static int add_user_ctl(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo, int
err = snd_ctl_elem_add_integer(svol->ctl, &cinfo->id, count, 0, svol->max_val, 0);
if (err < 0)
return err;
add_tlv_info(svol, cinfo);
/* set max value as default */
for (i = 0; i < count; i++)
svol->elem.value.integer.value[i] = svol->max_val;
@ -630,6 +641,12 @@ static int softvol_load_control(snd_pcm_t *pcm, snd_pcm_softvol_t *svol,
SNDERR("Cannot add a control");
return err;
}
} else {
/* check TLV availability */
unsigned int tlv[4];
err = snd_ctl_elem_tlv_read(svol->ctl, &cinfo->id, tlv, sizeof(tlv));
if (err < 0)
add_tlv_info(svol, cinfo);
}
}
@ -794,7 +811,7 @@ pcm.name {
[subdevice INT] # subdevice number of the element
[count INT] # control channels 1 or 2 (default: 2)
}
[min_dB REAL] # minimal dB value (default: -48.0)
[min_dB REAL] # minimal dB value (default: -51.0)
[resolution INT] # resolution (default: 256)
}
\endcode