audio/ril_interface.c

/*
 * Copyright (C) 2013 The CyanogenMod Project
 * Copyright (C) 2017 Andreas Schneider <asn@cryptomilk.org>
 *
 * 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_ril"
/*#define LOG_NDEBUG 0*/

#include <errno.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <string.h>

#include <utils/Log.h>
#include <cutils/properties.h>

#include "ril_interface.h"

#define VOLUME_STEPS_DEFAULT  "5"
#define VOLUME_STEPS_PROPERTY "ro.config.vc_call_vol_steps"

/* Audio WB AMR callback */
/*
 * TODO:
 * struct audio_device {
 *     HRilClient client;
 *     void *data
 * }
 * static struct audio_device _audio_devices[64];
 *
 * When registering a call back we should store it in the array and when
 * the callback is triggered find the data pointer based on the client
 * passed in.
 */
static ril_wb_amr_callback _wb_amr_callback;
static void *_wb_amr_data = NULL;

/* This is the callback function that the RIL uses to
set the wideband AMR state */
static int ril_internal_wb_amr_callback(HRilClient client __unused,
                                        const void *data,
                                        size_t datalen)
{
    int enable = 0;

    if (_wb_amr_data == NULL || _wb_amr_callback == NULL) {
        return -1;
    }

    if (datalen != 1) {
        return -1;
    }

    if (*((int *)data) != 0) {
        enable = 1;
    }

    _wb_amr_callback(_wb_amr_data, enable);

    return 0;
}

static int ril_connect_if_required(struct ril_handle *ril)
{
    int ok;
    int rc;

    if (ril->client == NULL) {
        ALOGE("ril->client is NULL");
        return -1;
    }

    ok = isConnected_RILD(ril->client);
    if (ok) {
        return 0;
    }

    rc = Connect_RILD(ril->client);
    if (rc != RIL_CLIENT_ERR_SUCCESS) {
        ALOGE("FATAL: Failed to connect to RILD: %s",
              strerror(errno));
        return -1;
    }

    return 0;
}

int ril_open(struct ril_handle *ril)
{
    char property[PROPERTY_VALUE_MAX];

    if (ril == NULL) {
        return -1;
    }

    ril->client = OpenClient_RILD();
    if (ril->client == NULL) {
        ALOGE("OpenClient_RILD() failed");
        return -1;
    }

    property_get(VOLUME_STEPS_PROPERTY, property, VOLUME_STEPS_DEFAULT);
    ril->volume_steps_max = atoi(property);

    /*
     * This catches the case where VOLUME_STEPS_PROPERTY does not contain
     * an integer
     */
    if (ril->volume_steps_max == 0) {
        ril->volume_steps_max = atoi(VOLUME_STEPS_DEFAULT);
    }

    return 0;
}

int ril_close(struct ril_handle *ril)
{
    int rc;

    if (ril == NULL || ril->client == NULL) {
        return -1;
    }

    rc = Disconnect_RILD(ril->client);
    if (rc != RIL_CLIENT_ERR_SUCCESS) {
        ALOGE("Disconnect_RILD failed");
        return -1;
    }

    rc = CloseClient_RILD(ril->client);
    if (rc != RIL_CLIENT_ERR_SUCCESS) {
        ALOGE("CloseClient_RILD() failed");
        return -1;
    }
    ril->client = NULL;

    return 0;
}

int ril_set_wb_amr_callback(struct ril_handle *ril,
                            ril_wb_amr_callback fn,
                            void *data)
{
    int rc;

    if (fn == NULL || data == NULL) {
        return -1;
    }

    _wb_amr_callback = fn;
    _wb_amr_data = data;

    ALOGV("%s: RegisterUnsolicitedHandler(%d, %p)",
          __func__,
          RIL_UNSOL_SNDMGR_WB_AMR_REPORT,
          ril_set_wb_amr_callback);

    /* register the wideband AMR callback */
    rc = RegisterUnsolicitedHandler(ril->client,
                                    RIL_UNSOL_SNDMGR_WB_AMR_REPORT,
                                    (RilOnUnsolicited)ril_internal_wb_amr_callback);
    if (rc != RIL_CLIENT_ERR_SUCCESS) {
        ALOGE("%s: Failed to register WB_AMR callback", __func__);
        ril_close(ril);
        return -1;
    }

    return 0;
}

int ril_set_call_volume(struct ril_handle *ril,
                        enum _SoundType sound_type,
                        float volume)
{
    int rc;

    rc = ril_connect_if_required(ril);
    if (rc != 0) {
        return 0;
    }

    rc = SetCallVolume(ril->client,
                       sound_type,
                       (int)(volume * ril->volume_steps_max));

    return rc;
}

int ril_set_call_audio_path(struct ril_handle *ril, enum _AudioPath path)
{
    int rc;

    rc = ril_connect_if_required(ril);
    if (rc != 0) {
        return 0;
    }

    rc = SetCallAudioPath(ril->client, path);

    return rc;
}

int ril_set_call_clock_sync(struct ril_handle *ril,
                            enum _SoundClockCondition condition)
{
    int rc;

    rc = ril_connect_if_required(ril);
    if (rc != 0) {
        return 0;
    }

    rc = SetCallClockSync(ril->client, condition);

    return rc;
}

int ril_set_mute(struct ril_handle *ril, enum _MuteCondition condition)
{
    int rc;

    rc = ril_connect_if_required(ril);
    if (rc != 0) {
        return 0;
    }

    rc = SetMute(ril->client, condition);

    return rc;
}

int ril_set_two_mic_control(struct ril_handle *ril,
                            enum __TwoMicSolDevice device,
                            enum __TwoMicSolReport report)
{
    int rc;

    rc = ril_connect_if_required(ril);
    if (rc != 0) {
        return 0;
    }

    rc = SetTwoMicControl(ril->client, device, report);

    return rc;
}