ca0106_mixer.c

鼎力推荐！本程序是基于嵌入式LUNUX系统开发的源程序代码

        return snd_ca0106_volume_get(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_get_analog_unknown(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_UNKNOWN_CHANNEL;
	int reg = PLAYBACK_VOLUME2;
        return snd_ca0106_volume_get(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_get_analog_rear(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_REAR_CHANNEL;
	int reg = PLAYBACK_VOLUME2;
        return snd_ca0106_volume_get(kcontrol, ucontrol, reg, channel_id);
}

static int snd_ca0106_volume_get_feedback(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = 1;
	int reg = CAPTURE_CONTROL;
        return snd_ca0106_volume_get(kcontrol, ucontrol, reg, channel_id);
}
                                                                                                                           
static int snd_ca0106_volume_put(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol, int reg, int channel_id)
{
        ca0106_t *emu = snd_kcontrol_chip(kcontrol);
        unsigned int value;
        //value = snd_ca0106_ptr_read(emu, reg, channel_id);
        //value = value & 0xffff;
        value = ((0xff - ucontrol->value.integer.value[0]) << 24) | ((0xff - ucontrol->value.integer.value[1]) << 16);
        value = value | ((0xff - ucontrol->value.integer.value[0]) << 8) | ((0xff - ucontrol->value.integer.value[1]) );
        snd_ca0106_ptr_write(emu, reg, channel_id, value);
        return 1;
}
static int snd_ca0106_volume_put_spdif_front(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_FRONT_CHANNEL;
	int reg = PLAYBACK_VOLUME1;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_spdif_center_lfe(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_CENTER_LFE_CHANNEL;
	int reg = PLAYBACK_VOLUME1;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_spdif_unknown(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_UNKNOWN_CHANNEL;
	int reg = PLAYBACK_VOLUME1;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_spdif_rear(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_REAR_CHANNEL;
	int reg = PLAYBACK_VOLUME1;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_analog_front(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_FRONT_CHANNEL;
	int reg = PLAYBACK_VOLUME2;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_analog_center_lfe(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_CENTER_LFE_CHANNEL;
	int reg = PLAYBACK_VOLUME2;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_analog_unknown(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_UNKNOWN_CHANNEL;
	int reg = PLAYBACK_VOLUME2;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}
static int snd_ca0106_volume_put_analog_rear(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = CONTROL_REAR_CHANNEL;
	int reg = PLAYBACK_VOLUME2;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}

static int snd_ca0106_volume_put_feedback(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
	int channel_id = 1;
	int reg = CAPTURE_CONTROL;
        return snd_ca0106_volume_put(kcontrol, ucontrol, reg, channel_id);
}

static snd_kcontrol_new_t snd_ca0106_volume_control_analog_front =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Analog Front Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_analog_front,
        .put =          snd_ca0106_volume_put_analog_front
};
static snd_kcontrol_new_t snd_ca0106_volume_control_analog_center_lfe =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Analog Center/LFE Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_analog_center_lfe,
        .put =          snd_ca0106_volume_put_analog_center_lfe
};
static snd_kcontrol_new_t snd_ca0106_volume_control_analog_unknown =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Analog Unknown Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_analog_unknown,
        .put =          snd_ca0106_volume_put_analog_unknown
};
static snd_kcontrol_new_t snd_ca0106_volume_control_analog_rear =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Analog Rear Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_analog_rear,
        .put =          snd_ca0106_volume_put_analog_rear
};
static snd_kcontrol_new_t snd_ca0106_volume_control_spdif_front =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "SPDIF Front Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_spdif_front,
        .put =          snd_ca0106_volume_put_spdif_front
};
static snd_kcontrol_new_t snd_ca0106_volume_control_spdif_center_lfe =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "SPDIF Center/LFE Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_spdif_center_lfe,
        .put =          snd_ca0106_volume_put_spdif_center_lfe
};
static snd_kcontrol_new_t snd_ca0106_volume_control_spdif_unknown =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "SPDIF Unknown Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_spdif_unknown,
        .put =          snd_ca0106_volume_put_spdif_unknown
};
static snd_kcontrol_new_t snd_ca0106_volume_control_spdif_rear =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "SPDIF Rear Volume",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_spdif_rear,
        .put =          snd_ca0106_volume_put_spdif_rear
};

static snd_kcontrol_new_t snd_ca0106_volume_control_feedback =
{
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "CAPTURE feedback into PLAYBACK",
        .info =         snd_ca0106_volume_info,
        .get =          snd_ca0106_volume_get_feedback,
        .put =          snd_ca0106_volume_put_feedback
};


static int remove_ctl(snd_card_t *card, const char *name)
{
	snd_ctl_elem_id_t id;
	memset(&id, 0, sizeof(id));
	strcpy(id.name, name);
	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	return snd_ctl_remove_id(card, &id);
}

static snd_kcontrol_t *ctl_find(snd_card_t *card, const char *name)
{
	snd_ctl_elem_id_t sid;
	memset(&sid, 0, sizeof(sid));
	/* FIXME: strcpy is bad. */
	strcpy(sid.name, name);
	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	return snd_ctl_find_id(card, &sid);
}

static int rename_ctl(snd_card_t *card, const char *src, const char *dst)
{
	snd_kcontrol_t *kctl = ctl_find(card, src);
	if (kctl) {
		strcpy(kctl->id.name, dst);
		return 0;
	}
	return -ENOENT;
}

int __devinit snd_ca0106_mixer(ca0106_t *emu)
{
        int err;
        snd_kcontrol_t *kctl;
        snd_card_t *card = emu->card;
	char **c;
	static char *ca0106_remove_ctls[] = {
		"Master Mono Playback Switch",
		"Master Mono Playback Volume",
		"3D Control - Switch",
		"3D Control Sigmatel - Depth",
		"PCM Playback Switch",
		"PCM Playback Volume",
		"CD Playback Switch",
		"CD Playback Volume",
		"Phone Playback Switch",
		"Phone Playback Volume",
		"Video Playback Switch",
		"Video Playback Volume",
		"PC Speaker Playback Switch",
		"PC Speaker Playback Volume",
		"Mono Output Select",
		"Capture Source",
		"Capture Switch",
		"Capture Volume",
		"External Amplifier",
		"Sigmatel 4-Speaker Stereo Playback Switch",
		"Sigmatel Surround Phase Inversion Playback ",
		NULL
	};
	static char *ca0106_rename_ctls[] = {
		"Master Playback Switch", "Capture Switch",
		"Master Playback Volume", "Capture Volume",
		"Line Playback Switch", "AC97 Line Capture Switch",
		"Line Playback Volume", "AC97 Line Capture Volume",
		"Aux Playback Switch", "AC97 Aux Capture Switch",
		"Aux Playback Volume", "AC97 Aux Capture Volume",
		"Mic Playback Switch", "AC97 Mic Capture Switch",
		"Mic Playback Volume", "AC97 Mic Capture Volume",
		"Mic Select", "AC97 Mic Select",
		"Mic Boost (+20dB)", "AC97 Mic Boost (+20dB)",
		NULL
	};
#if 1
	for (c=ca0106_remove_ctls; *c; c++)
		remove_ctl(card, *c);
	for (c=ca0106_rename_ctls; *c; c += 2)
		rename_ctl(card, c[0], c[1]);
#endif

        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_analog_front, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_analog_rear, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_analog_center_lfe, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_analog_unknown, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_spdif_front, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_spdif_rear, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_spdif_center_lfe, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_spdif_unknown, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
        if ((kctl = snd_ctl_new1(&snd_ca0106_volume_control_feedback, emu)) == NULL)
                return -ENOMEM;
        if ((err = snd_ctl_add(card, kctl)))
                return err;
	if ((kctl = snd_ctl_new1(&snd_ca0106_spdif_mask_control, emu)) == NULL)
		return -ENOMEM;
	if ((err = snd_ctl_add(card, kctl)))
		return err;
	if ((kctl = snd_ctl_new1(&snd_ca0106_shared_spdif, emu)) == NULL)
		return -ENOMEM;
	if ((err = snd_ctl_add(card, kctl)))
		return err;
	if ((kctl = snd_ctl_new1(&snd_ca0106_capture_source, emu)) == NULL)
		return -ENOMEM;
	if ((err = snd_ctl_add(card, kctl)))
		return err;
	if ((kctl = ctl_find(card, SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT))) != NULL) {
		/* already defined by ac97, remove it */
		/* FIXME: or do we need both controls? */
		remove_ctl(card, SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT));
	}
	if ((kctl = snd_ctl_new1(&snd_ca0106_spdif_control, emu)) == NULL)
		return -ENOMEM;
	if ((err = snd_ctl_add(card, kctl)))
		return err;
        return 0;
}