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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "audio_hw_primary"
     18 /*#define LOG_NDEBUG 0*/
     19 
     20 #include <dlfcn.h>
     21 #include <stdlib.h>
     22 
     23 #include <utils/Log.h>
     24 #include <cutils/properties.h>
     25 
     26 #include "ril_interface.h"
     27 
     28 #define VOLUME_STEPS_DEFAULT  "5"
     29 #define VOLUME_STEPS_PROPERTY "ro.config.vc_call_vol_steps"
     30 
     31 /* Function pointers */
     32 void *(*_ril_open_client)(void);
     33 int (*_ril_close_client)(void *);
     34 int (*_ril_connect)(void *);
     35 int (*_ril_is_connected)(void *);
     36 int (*_ril_disconnect)(void *);
     37 int (*_ril_set_call_volume)(void *, enum ril_sound_type, int);
     38 int (*_ril_set_call_audio_path)(void *, enum ril_audio_path);
     39 int (*_ril_register_unsolicited_handler)(void *, int, void *);
     40 int (*_ril_get_wb_amr)(void *, void *);
     41 
     42 /* Audio WB AMR callback */
     43 void (*_audio_set_wb_amr_callback)(void *, int);
     44 void *callback_data = NULL;
     45 
     46 void ril_register_set_wb_amr_callback(void *function, void *data)
     47 {
     48     _audio_set_wb_amr_callback = function;
     49     callback_data = data;
     50 }
     51 
     52 /* This is the callback function that the RIL uses to
     53 set the wideband AMR state */
     54 static int ril_set_wb_amr_callback(void *ril_client,
     55                                    const void *data,
     56                                    size_t datalen)
     57 {
     58     int enable = ((int *)data)[0];
     59 
     60     if (!callback_data || !_audio_set_wb_amr_callback)
     61         return -1;
     62 
     63     _audio_set_wb_amr_callback(callback_data, enable);
     64 
     65     return 0;
     66 }
     67 
     68 static int ril_connect_if_required(struct ril_handle *ril)
     69 {
     70     if (_ril_is_connected(ril->client))
     71         return 0;
     72 
     73     if (_ril_connect(ril->client) != RIL_CLIENT_ERR_SUCCESS) {
     74         ALOGE("ril_connect() failed");
     75         return -1;
     76     }
     77 
     78     /* get wb amr status to set pcm samplerate depending on
     79        wb amr status when ril is connected. */
     80     if(_ril_get_wb_amr)
     81         _ril_get_wb_amr(ril->client, ril_set_wb_amr_callback);
     82 
     83     return 0;
     84 }
     85 
     86 int ril_open(struct ril_handle *ril)
     87 {
     88     char property[PROPERTY_VALUE_MAX];
     89 
     90     if (!ril)
     91         return -1;
     92 
     93     ril->handle = dlopen(RIL_CLIENT_LIBPATH, RTLD_NOW);
     94 
     95     if (!ril->handle) {
     96         ALOGE("Cannot open '%s'", RIL_CLIENT_LIBPATH);
     97         return -1;
     98     }
     99 
    100     _ril_open_client = dlsym(ril->handle, "OpenClient_RILD");
    101     _ril_close_client = dlsym(ril->handle, "CloseClient_RILD");
    102     _ril_connect = dlsym(ril->handle, "Connect_RILD");
    103     _ril_is_connected = dlsym(ril->handle, "isConnected_RILD");
    104     _ril_disconnect = dlsym(ril->handle, "Disconnect_RILD");
    105     _ril_set_call_volume = dlsym(ril->handle, "SetCallVolume");
    106     _ril_set_call_audio_path = dlsym(ril->handle, "SetCallAudioPath");
    107     _ril_register_unsolicited_handler = dlsym(ril->handle,
    108                                               "RegisterUnsolicitedHandler");
    109     /* since this function is not supported in all RILs, don't require it */
    110     _ril_get_wb_amr = dlsym(ril->handle, "GetWB_AMR");
    111 
    112     if (!_ril_open_client || !_ril_close_client || !_ril_connect ||
    113         !_ril_is_connected || !_ril_disconnect || !_ril_set_call_volume ||
    114         !_ril_set_call_audio_path || !_ril_register_unsolicited_handler) {
    115         ALOGE("Cannot get symbols from '%s'", RIL_CLIENT_LIBPATH);
    116         dlclose(ril->handle);
    117         return -1;
    118     }
    119 
    120     ril->client = _ril_open_client();
    121     if (!ril->client) {
    122         ALOGE("ril_open_client() failed");
    123         dlclose(ril->handle);
    124         return -1;
    125     }
    126 
    127     /* register the wideband AMR callback */
    128     _ril_register_unsolicited_handler(ril->client, RIL_UNSOL_WB_AMR_STATE,
    129                                       ril_set_wb_amr_callback);
    130 
    131     property_get(VOLUME_STEPS_PROPERTY, property, VOLUME_STEPS_DEFAULT);
    132     ril->volume_steps_max = atoi(property);
    133     /* this catches the case where VOLUME_STEPS_PROPERTY does not contain
    134     an integer */
    135     if (ril->volume_steps_max == 0)
    136         ril->volume_steps_max = atoi(VOLUME_STEPS_DEFAULT);
    137 
    138     return 0;
    139 }
    140 
    141 int ril_close(struct ril_handle *ril)
    142 {
    143     if (!ril || !ril->handle || !ril->client)
    144         return -1;
    145 
    146     if ((_ril_disconnect(ril->client) != RIL_CLIENT_ERR_SUCCESS) ||
    147         (_ril_close_client(ril->client) != RIL_CLIENT_ERR_SUCCESS)) {
    148         ALOGE("ril_disconnect() or ril_close_client() failed");
    149         return -1;
    150     }
    151 
    152     dlclose(ril->handle);
    153     return 0;
    154 }
    155 
    156 int ril_set_call_volume(struct ril_handle *ril, enum ril_sound_type sound_type,
    157                         float volume)
    158 {
    159     if (ril_connect_if_required(ril))
    160         return 0;
    161 
    162     return _ril_set_call_volume(ril->client, sound_type,
    163                                 (int)(volume * ril->volume_steps_max));
    164 }
    165 
    166 int ril_set_call_audio_path(struct ril_handle *ril, enum ril_audio_path path)
    167 {
    168     if (ril_connect_if_required(ril))
    169         return 0;
    170 
    171     return _ril_set_call_audio_path(ril->client, path);
    172 }
    173