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/*
* Copyright (C) 2016 "IoT.bzh"
* Author Fulup Ar Foll <fulup@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <stdio.h>
#include <sys/ioctl.h>
#include <alsa/asoundlib.h>
#include <alsa/control_external.h>
#include <linux/soundcard.h>
typedef struct afbHalPlug {
snd_ctl_ext_t ext;
char *device;
unsigned int num_vol_ctls;
unsigned int num_rec_items;
unsigned int vol_ctl[SOUND_MIXER_NRDEVICES];
unsigned int rec_item[SOUND_MIXER_NRDEVICES];
} afbHalPlug_t;
static const char *const vol_devices[SOUND_MIXER_NRDEVICES] = {
[SOUND_MIXER_VOLUME] = "Master Playback Volume",
[SOUND_MIXER_BASS] = "Tone Control - Bass",
[SOUND_MIXER_TREBLE] = "Tone Control - Treble",
[SOUND_MIXER_SYNTH] = "Synth Playback Volume",
[SOUND_MIXER_PCM] = "PCM Playback Volume",
[SOUND_MIXER_SPEAKER] = "PC Speaker Playback Volume",
[SOUND_MIXER_LINE] = "Line Playback Volume",
[SOUND_MIXER_MIC] = "Mic Playback Volume",
[SOUND_MIXER_CD] = "CD Playback Volume",
[SOUND_MIXER_IMIX] = "Monitor Mix Playback Volume",
[SOUND_MIXER_ALTPCM] = "Headphone Playback Volume",
[SOUND_MIXER_RECLEV] = "Capture Volume",
[SOUND_MIXER_IGAIN] = "Capture Volume",
[SOUND_MIXER_OGAIN] = "Playback Volume",
[SOUND_MIXER_LINE1] = "Aux Playback Volume",
[SOUND_MIXER_LINE2] = "Aux1 Playback Volume",
[SOUND_MIXER_LINE3] = "Line1 Playback Volume",
[SOUND_MIXER_DIGITAL1] = "IEC958 Playback Volume",
[SOUND_MIXER_DIGITAL2] = "Digital Playback Volume",
[SOUND_MIXER_DIGITAL3] = "Digital1 Playback Volume",
[SOUND_MIXER_PHONEIN] = "Phone Playback Volume",
[SOUND_MIXER_PHONEOUT] = "Master Mono Playback Volume",
[SOUND_MIXER_VIDEO] = "Video Playback Volume",
[SOUND_MIXER_RADIO] = "Radio Playback Volume",
[SOUND_MIXER_MONITOR] = "Monitor Playback Volume",
};
static const char *const rec_devices[SOUND_MIXER_NRDEVICES] = {
[SOUND_MIXER_VOLUME] = "Mix Capture Switch",
[SOUND_MIXER_SYNTH] = "Synth Capture Switch",
[SOUND_MIXER_PCM] = "PCM Capture Switch",
[SOUND_MIXER_LINE] = "Line Capture Switch",
[SOUND_MIXER_MIC] = "Mic Capture Switch",
[SOUND_MIXER_CD] = "CD Capture Switch",
[SOUND_MIXER_LINE1] = "Aux Capture Switch",
[SOUND_MIXER_LINE2] = "Aux1 Capture Switch",
[SOUND_MIXER_LINE3] = "Line1 Capture Switch",
[SOUND_MIXER_DIGITAL1] = "IEC958 Capture Switch",
[SOUND_MIXER_DIGITAL2] = "Digital Capture Switch",
[SOUND_MIXER_DIGITAL3] = "Digital1 Capture Switch",
[SOUND_MIXER_PHONEIN] = "Phone Capture Switch",
[SOUND_MIXER_VIDEO] = "Video Capture Switch",
[SOUND_MIXER_RADIO] = "Radio Capture Switch",
};
static const char *const rec_items[SOUND_MIXER_NRDEVICES] = {
[SOUND_MIXER_VOLUME] = "Mix",
[SOUND_MIXER_SYNTH] = "Synth",
[SOUND_MIXER_PCM] = "PCM",
[SOUND_MIXER_LINE] = "Line",
[SOUND_MIXER_MIC] = "Mic",
[SOUND_MIXER_CD] = "CD",
[SOUND_MIXER_LINE1] = "Aux",
[SOUND_MIXER_LINE2] = "Aux1",
[SOUND_MIXER_LINE3] = "Line1",
[SOUND_MIXER_DIGITAL1] = "IEC958",
[SOUND_MIXER_DIGITAL2] = "Digital",
[SOUND_MIXER_DIGITAL3] = "Digital1",
[SOUND_MIXER_PHONEIN] = "Phone",
[SOUND_MIXER_VIDEO] = "Video",
[SOUND_MIXER_RADIO] = "Radio",
};
static snd_ctl_ext_key_t AfbHalElemFind(snd_ctl_ext_t *ext,
const snd_ctl_elem_id_t *id) {
snd_ctl_hal_t *ctlHal = ext->private_data;
const char *name;
unsigned int i, key, numid;
numid = snd_ctl_elem_id_get_numid(id);
if (numid > 0) {
numid--;
if (numid < afbHalPlug->num_vol_ctls)
return afbHalPlug->vol_ctl[numid];
numid -= afbHalPlug->num_vol_ctls;
if (afbHalPlug->exclusive_input) {
if (!numid)
return OSS_KEY_CAPTURE_MUX;
} else if (numid < afbHalPlug->num_rec_items)
return afbHalPlug->rec_item[numid] |
OSS_KEY_CAPTURE_FLAG;
}
name = snd_ctl_elem_id_get_name(id);
if (! strcmp(name, "Capture Source")) {
if (afbHalPlug->exclusive_input)
return OSS_KEY_CAPTURE_MUX;
else
return SND_CTL_EXT_KEY_NOT_FOUND;
}
for (i = 0; i < afbHalPlug->num_vol_ctls; i++) {
key = afbHalPlug->vol_ctl[i];
if (! strcmp(name, vol_devices[key]))
return key;
}
for (i = 0; i < afbHalPlug->num_rec_items; i++) {
key = afbHalPlug->rec_item[i];
if (! strcmp(name, rec_devices[key]))
return key | OSS_KEY_CAPTURE_FLAG;
}
return SND_CTL_EXT_KEY_NOT_FOUND;
}
static int AfbHalGetAttrib(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key,
int *type, unsigned int *acc, unsigned int *count) {
return 0;
}
static int AfbHalGetInfo(snd_ctl_ext_t *ext ATTRIBUTE_UNUSED,
snd_ctl_ext_key_t key ATTRIBUTE_UNUSED,
long *imin, long *imax, long *istep) {
return 0;
}
static int AfbHalGetEnumInfo(snd_ctl_ext_t *ext,
snd_ctl_ext_key_t key ATTRIBUTE_UNUSED,
unsigned int *items) {
return 0;
}
static int AfbHalGetEnumName(snd_ctl_ext_t *ext,
snd_ctl_ext_key_t key ATTRIBUTE_UNUSED,
unsigned int item, char *name,
size_t name_max_len) {
return 0;
}
static int AfbHalReadInt(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value) {
return 0;
}
static int AfbHalReadEnumerate(snd_ctl_ext_t *ext,
snd_ctl_ext_key_t key ATTRIBUTE_UNUSED,
unsigned int *items) {
return 0;
}
static int AfbHalWriteInt(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value) {
return 0;
}
static int AfbHalWriteEnum(snd_ctl_ext_t *ext,
snd_ctl_ext_key_t key ATTRIBUTE_UNUSED,
unsigned int *items) {
return 0;
}
static int AfbHalEventRead(snd_ctl_ext_t *ext ATTRIBUTE_UNUSED,
snd_ctl_elem_id_t *id ATTRIBUTE_UNUSED,
unsigned int *event_mask ATTRIBUTE_UNUSED)
{
return -EAGAIN;
}
static snd_ctl_ext_callback_t afbHalCBs = {
.close = AfbHalClose,
.elem_count = AfbHalElemCount,
.elem_list = AfbHalElemList,
.find_elem = AfbHalElemFind,
.get_attribute = AfbHalGetAttrib,
.get_integer_info = AfbHalGetInfo,
.get_enumerated_info = AfbHalGetEnumInfo,
.get_enumerated_name = AfbHalGetEnumName,
.read_integer = AfbHalReadInt,
.read_enumerated = AfbHalReadEnumerate,
.write_integer = AfbHalWriteInt,
.write_enumerated = AfbHalWriteEnum,
.read_event = AfbHalEventRead,
};
SND_CTL_PLUGIN_DEFINE_FUNC(afb_hal) {
snd_config_iterator_t it, next;
afbHalPlug_t *afbHalPlug;
int err;
snd_config_for_each(it, next, conf) {
snd_config_t *n = snd_config_iterator_entry(it);
const char *id;
if (snd_config_get_id(n, &id) < 0)
continue;
if (strcmp(id, "comment") == 0 || strcmp(id, "type") == 0 || strcmp(id, "hint") == 0)
continue;
if (strcmp(id, "slave") == 0) {
if (snd_config_get_string(n, &device) < 0) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
}
continue;
}
SNDERR("Unknown field %s", id);
return -EINVAL;
}
// Create ALSA control plugin structure
afbHalPlug->ext.version = SND_CTL_EXT_VERSION;
afbHalPlug->ext.card_idx = 0; /* FIXME */
strcpy(afbHalPlug->ext.id, "AFB-HAL-CTL");
strcpy(afbHalPlug->ext.driver, "AFB-HAL");
strcpy(afbHalPlug->ext.name, "AFB-HAL Control Plugin");
strcpy(afbHalPlug->ext.mixername, "AFB-HAL Mixer Plugin");
strcpy(afbHalPlug->ext.longname, "Automotive-Linux Sound Abstraction Control Plugin");
afbHalPlug->ext.poll_fd = -1;
afbHalPlug->ext.callback = &afbHalCBs;
afbHalPlug->ext.private_data = afbHalPlug;
err = snd_ctl_ext_create(&afbHalPlug->ext, name, mode);
if (err < 0) goto OnErrorExit;
// Plugin register controls update handlep before exiting
*handlep = afbHalPlug->ext.handle;
return 0;
OnErrorExit:
free(afbHalPlug);
return -1;
}
SND_CTL_PLUGIN_SYMBOL(afb_hal);
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