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This file is part of Open Sound System.
Copyright (C) 4Front Technologies 1996-2008.
This this source file is released under GPL v2 license (no other versions). See the COPYING file included in the main directory of this source distribution for the license terms and conditions.
#define MODE2_MIXER_DEVICES (SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | \
SOUND_MASK_MIC | \
SOUND_MASK_LINE | SOUND_MASK_SPEAKER | \
SOUND_MASK_IGAIN | \
SOUND_MASK_PCM | SOUND_MASK_IMIX)
#define MODE2_REC_DEVICES (SOUND_MASK_LINE | SOUND_MASK_MIC | \
SOUND_MASK_LINE1|SOUND_MASK_IMIX)
struct mixer_def
{
unsigned int regno;
unsigned int polarity; /* 0=normal, 1=reversed */
unsigned int bitpos;
unsigned int nbits;
unsigned int mutepos;
};
typedef struct mixer_def mixer_ent;
typedef mixer_ent mixer_ents[2];
Most of the mixer entries work in backwards. Setting the polarity field makes them to work correctly.
The channel numbering used by individual soundcards is not fixed. Some cards have assigned different meanings for the AUX1, AUX2 and LINE inputs. The current version doesn't try to compensate this.
#define MIX_ENT(name, reg_l, pola_l, pos_l, len_l, reg_r, pola_r, pos_r, len_r, mute_bit) \
{{reg_l, pola_l, pos_l, len_l}, {reg_r, pola_r, pos_r, len_r, mute_bit}}
static mixer_ents cs4231_mix_devices[32] = {
MIX_ENT (SOUND_MIXER_VOLUME, 27, 1, 0, 4, 29, 1, 0, 4, 7),
MIX_ENT (SOUND_MIXER_BASS, 0, 0, 0, 0, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_TREBLE, 0, 0, 0, 0, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_SYNTH, 4, 1, 0, 5, 5, 1, 0, 5, 7),
MIX_ENT (SOUND_MIXER_PCM, 6, 1, 0, 6, 7, 1, 0, 6, 7),
MIX_ENT (SOUND_MIXER_SPEAKER, 26, 1, 0, 4, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_LINE, 18, 1, 0, 5, 19, 1, 0, 5, 7),
MIX_ENT (SOUND_MIXER_MIC, 0, 0, 5, 1, 1, 0, 5, 1, 8),
MIX_ENT (SOUND_MIXER_CD, 2, 1, 0, 5, 3, 1, 0, 5, 7),
MIX_ENT (SOUND_MIXER_IMIX, 13, 1, 2, 6, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_ALTPCM, 0, 0, 0, 0, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_RECLEV, 0, 0, 0, 0, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_IGAIN, 0, 0, 0, 4, 1, 0, 0, 4, 8),
MIX_ENT (SOUND_MIXER_OGAIN, 0, 0, 0, 0, 0, 0, 0, 0, 8),
MIX_ENT (SOUND_MIXER_LINE1, 2, 1, 0, 5, 3, 1, 0, 5, 7),
MIX_ENT (SOUND_MIXER_LINE2, 4, 1, 0, 5, 5, 1, 0, 5, 7),
MIX_ENT (SOUND_MIXER_LINE, 18, 1, 0, 5, 19, 1, 0, 5, 7)
};
static int default_mixer_levels[32] = {
0x3232, /* Master Volume */
0x3232, /* Bass */
0x3232, /* Treble */
0x4b4b, /* FM */
0x3232, /* PCM */
0x1515, /* PC Speaker */
0x2020, /* Line in */
0x2020, /* Mic */
0x4b4b, /* CD */
0x0000, /* Recording monitor */
0x4b4b, /* Second PCM */
0x4b4b, /* Recording level */
0x0000, /* Input gain */
0x4b4b, /* Output gain */
0x2020, /* Line1 */
0x2020, /* Line2 */
0x1515 /* Line3 (usually line in) */
};
#define LEFT_CHN 0
#define RIGHT_CHN 1
Channel enable bits for ioctl(SOUND_MIXER_PRIVATE1)
#ifndef AUDIO_SPEAKER #define AUDIO_SPEAKER 0x01 /* Enable mono output */ #define AUDIO_HEADPHONE 0x02 /* Sparc only */ #define AUDIO_LINE_OUT 0x04 /* Sparc only */ #endif