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/*
* Copyright (C) 2017 Christopher N. Hesse <raymanfx@gmail.com>
*
* 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.
*/
#define LOG_TAG "audio_hw_audience"
#define LOG_NDEBUG 0
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cutils/log.h>
#include <audience-routes.h>
#include "audience.h"
/*
* Writes an Integer to a file.
*
* @param path The absolute path string.
* @param value The Integer value to be written.
* @return 0 on success, errno on error.
*/
static int write_int(char const *path, const int value)
{
int fd, len, num_bytes;
int ret = 0;
char buffer[20];
fd = open(path, O_WRONLY);
if (fd < 0) {
ret = errno;
ALOGE("%s: failed to open %s (%s)", __func__, path, strerror(errno));
goto exit;
}
num_bytes = sprintf(buffer, "%d", value);
len = write(fd, buffer, num_bytes);
if (len < 0) {
ret = errno;
ALOGE("%s: failed to write to %s (%s)", __func__, path, strerror(errno));
goto exit;
}
exit:
close(fd);
return ret;
}
/*
* Writes the route value to sysfs.
*
* @param value The long Integer value to be written.
* @return 0 on success, -1 or errno on error.
*/
static int es_route_value_set(int value)
{
return write_int(SYSFS_PATH_PRESET, value);
}
/*
* Writes the veq control to sysfs.
*
* @param value The Integer value to be written.
* @return 0 on success, -1 or errno on error.
*/
static int es_veq_control_set(int value)
{
return write_int(SYSFS_PATH_VEQ, value);
}
/*
* Writes the extra volume to sysfs.
*
* @param value The Integer value to be written.
* @return 0 on success, -1 or errno on error.
*/
static int es_extra_volume_set(int value)
{
return write_int(SYSFS_PATH_EXTRAVOLUME, value);
}
/*
* Convertes an out_device from the session to an earSmart compatible route.
*
* @param out_device The output device to be converted.
* @return Audience earSmart route, coded as long Integer.
*/
static long es_device_to_route(struct voice_session *session)
{
long ret;
long nb_route;
long wb_route;
switch(session->out_device) {
case AUDIO_DEVICE_OUT_EARPIECE:
nb_route = Call_CT_NB;
wb_route = Call_CT_WB;
break;
case AUDIO_DEVICE_OUT_SPEAKER:
nb_route = Call_FT_NB;
wb_route = Call_FT_WB;
break;
case AUDIO_DEVICE_OUT_WIRED_HEADSET:
case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
nb_route = Call_HS_NB;
wb_route = Call_HS_WB;
break;
case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
nb_route = Call_BT_NB;
wb_route = Call_BT_WB;
break;
default:
/* if output device isn't supported, use earpiece by default */
ALOGE("%s: unknown output device: %d, defaulting to earpiece", __func__,
session->out_device);
nb_route = Call_CT_NB;
wb_route = Call_CT_WB;
break;
}
/* TODO: Handle wb_amr=2 */
if (session->wb_amr_type >= 1) {
ret = wb_route;
} else {
ret = nb_route;
}
ALOGV("%s: converting out_device=%d to %s route: %ld", __func__, session->out_device,
ret == wb_route ? "Wide Band" : "Narrow Band", ret);
return ret;
}
/*
* Configures and enables the Audience earSmart IC.
*
* @param session Reference to the active voice call session.
* @return @return 0 on success, -1 or errno on error.
*/
int es_start_voice_session(struct voice_session *session)
{
int ret;
long es_route = es_device_to_route(session);
/* TODO: Calculate these */
int extra_volume = 0;
int veq_control = 4;
/*
* The control flow for audience earSmart chip is as follows:
*
* route_value >> power_control(internal) >> extra_volume >> veq_control
*/
ret = es_route_value_set(es_route);
if (ret != 0) {
ALOGE("%s: es_route_value_set(%ld) failed with code: %d", __func__, es_route, ret);
goto exit;
}
ret = es_extra_volume_set(extra_volume);
if (ret != 0) {
ALOGE("%s: es_extra_volume_set(%d) failed with code: %d", __func__, extra_volume, ret);
goto exit;
}
ret = es_veq_control_set(veq_control);
if (ret != 0) {
ALOGE("%s: es_veq_control_set(%d) failed with code: %d", __func__, veq_control, ret);
goto exit;
}
exit:
return ret;
}
/*
* Disables the Audience earSmart IC.
*/
void es_stop_voice_session()
{
/* This will cancel any pending workers, stop the stream and send the IC to sleep */
es_route_value_set(AUDIENCE_SLEEP);
}
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