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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_policy_default"
     18 //#define LOG_NDEBUG 0
     19 
     20 #include <errno.h>
     21 #include <stdint.h>
     22 #include <stdlib.h>
     23 #include <string.h>
     24 
     25 #include <hardware/hardware.h>
     26 #include <system/audio.h>
     27 #include <system/audio_policy.h>
     28 #include <hardware/audio_policy.h>
     29 
     30 struct default_ap_module {
     31     struct audio_policy_module module;
     32 };
     33 
     34 struct default_ap_device {
     35     struct audio_policy_device device;
     36 };
     37 
     38 struct default_audio_policy {
     39     struct audio_policy policy;
     40 
     41     struct audio_policy_service_ops *aps_ops;
     42     void *service;
     43 };
     44 
     45 static int ap_set_device_connection_state(struct audio_policy *pol,
     46                                           audio_devices_t device,
     47                                           audio_policy_dev_state_t state,
     48                                           const char *device_address)
     49 {
     50     return -ENOSYS;
     51 }
     52 
     53 static audio_policy_dev_state_t ap_get_device_connection_state(
     54                                             const struct audio_policy *pol,
     55                                             audio_devices_t device,
     56                                             const char *device_address)
     57 {
     58     return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
     59 }
     60 
     61 static void ap_set_phone_state(struct audio_policy *pol, audio_mode_t state)
     62 {
     63 }
     64 
     65 // deprecated, never called
     66 static void ap_set_ringer_mode(struct audio_policy *pol, uint32_t mode,
     67                                uint32_t mask)
     68 {
     69 }
     70 
     71 static void ap_set_force_use(struct audio_policy *pol,
     72                           audio_policy_force_use_t usage,
     73                           audio_policy_forced_cfg_t config)
     74 {
     75 }
     76 
     77     /* retreive current device category forced for a given usage */
     78 static audio_policy_forced_cfg_t ap_get_force_use(
     79                                                const struct audio_policy *pol,
     80                                                audio_policy_force_use_t usage)
     81 {
     82     return AUDIO_POLICY_FORCE_NONE;
     83 }
     84 
     85 /* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
     86  * can still be muted. */
     87 static void ap_set_can_mute_enforced_audible(struct audio_policy *pol,
     88                                              bool can_mute)
     89 {
     90 }
     91 
     92 static int ap_init_check(const struct audio_policy *pol)
     93 {
     94     return 0;
     95 }
     96 
     97 static audio_io_handle_t ap_get_output(struct audio_policy *pol,
     98                                        audio_stream_type_t stream,
     99                                        uint32_t sampling_rate,
    100                                        audio_format_t format,
    101                                        audio_channel_mask_t channelMask,
    102                                        audio_output_flags_t flags,
    103                                        const audio_offload_info_t *info)
    104 {
    105     return 0;
    106 }
    107 
    108 static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
    109                            audio_stream_type_t stream, int session)
    110 {
    111     return -ENOSYS;
    112 }
    113 
    114 static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
    115                           audio_stream_type_t stream, int session)
    116 {
    117     return -ENOSYS;
    118 }
    119 
    120 static void ap_release_output(struct audio_policy *pol,
    121                               audio_io_handle_t output)
    122 {
    123 }
    124 
    125 static audio_io_handle_t ap_get_input(struct audio_policy *pol, audio_source_t inputSource,
    126                                       uint32_t sampling_rate,
    127                                       audio_format_t format,
    128                                       audio_channel_mask_t channelMask,
    129                                       audio_in_acoustics_t acoustics)
    130 {
    131     return 0;
    132 }
    133 
    134 static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
    135 {
    136     return -ENOSYS;
    137 }
    138 
    139 static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
    140 {
    141     return -ENOSYS;
    142 }
    143 
    144 static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
    145 {
    146 }
    147 
    148 static void ap_init_stream_volume(struct audio_policy *pol,
    149                                   audio_stream_type_t stream, int index_min,
    150                                   int index_max)
    151 {
    152 }
    153 
    154 static int ap_set_stream_volume_index(struct audio_policy *pol,
    155                                       audio_stream_type_t stream,
    156                                       int index)
    157 {
    158     return -ENOSYS;
    159 }
    160 
    161 static int ap_get_stream_volume_index(const struct audio_policy *pol,
    162                                       audio_stream_type_t stream,
    163                                       int *index)
    164 {
    165     return -ENOSYS;
    166 }
    167 
    168 static int ap_set_stream_volume_index_for_device(struct audio_policy *pol,
    169                                       audio_stream_type_t stream,
    170                                       int index,
    171                                       audio_devices_t device)
    172 {
    173     return -ENOSYS;
    174 }
    175 
    176 static int ap_get_stream_volume_index_for_device(const struct audio_policy *pol,
    177                                       audio_stream_type_t stream,
    178                                       int *index,
    179                                       audio_devices_t device)
    180 {
    181     return -ENOSYS;
    182 }
    183 
    184 static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
    185                                            audio_stream_type_t stream)
    186 {
    187     return 0;
    188 }
    189 
    190 static audio_devices_t ap_get_devices_for_stream(const struct audio_policy *pol,
    191                                           audio_stream_type_t stream)
    192 {
    193     return 0;
    194 }
    195 
    196 static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
    197                                             const struct effect_descriptor_s *desc)
    198 {
    199     return 0;
    200 }
    201 
    202 static int ap_register_effect(struct audio_policy *pol,
    203                               const struct effect_descriptor_s *desc,
    204                               audio_io_handle_t output,
    205                               uint32_t strategy,
    206                               int session,
    207                               int id)
    208 {
    209     return -ENOSYS;
    210 }
    211 
    212 static int ap_unregister_effect(struct audio_policy *pol, int id)
    213 {
    214     return -ENOSYS;
    215 }
    216 
    217 static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
    218 {
    219     return -ENOSYS;
    220 }
    221 
    222 static bool ap_is_stream_active(const struct audio_policy *pol, audio_stream_type_t stream,
    223                                 uint32_t in_past_ms)
    224 {
    225     return false;
    226 }
    227 
    228 static int ap_dump(const struct audio_policy *pol, int fd)
    229 {
    230     return -ENOSYS;
    231 }
    232 
    233 static bool ap_is_offload_supported(const struct audio_policy *pol,
    234                                    const audio_offload_info_t *info)
    235 {
    236     return false;
    237 }
    238 
    239 static int create_default_ap(const struct audio_policy_device *device,
    240                              struct audio_policy_service_ops *aps_ops,
    241                              void *service,
    242                              struct audio_policy **ap)
    243 {
    244     struct default_ap_device *dev;
    245     struct default_audio_policy *dap;
    246     int ret;
    247 
    248     *ap = NULL;
    249 
    250     if (!service || !aps_ops)
    251         return -EINVAL;
    252 
    253     dap = (struct default_audio_policy *)calloc(1, sizeof(*dap));
    254     if (!dap)
    255         return -ENOMEM;
    256 
    257     dap->policy.set_device_connection_state = ap_set_device_connection_state;
    258     dap->policy.get_device_connection_state = ap_get_device_connection_state;
    259     dap->policy.set_phone_state = ap_set_phone_state;
    260     dap->policy.set_ringer_mode = ap_set_ringer_mode;
    261     dap->policy.set_force_use = ap_set_force_use;
    262     dap->policy.get_force_use = ap_get_force_use;
    263     dap->policy.set_can_mute_enforced_audible =
    264         ap_set_can_mute_enforced_audible;
    265     dap->policy.init_check = ap_init_check;
    266     dap->policy.get_output = ap_get_output;
    267     dap->policy.start_output = ap_start_output;
    268     dap->policy.stop_output = ap_stop_output;
    269     dap->policy.release_output = ap_release_output;
    270     dap->policy.get_input = ap_get_input;
    271     dap->policy.start_input = ap_start_input;
    272     dap->policy.stop_input = ap_stop_input;
    273     dap->policy.release_input = ap_release_input;
    274     dap->policy.init_stream_volume = ap_init_stream_volume;
    275     dap->policy.set_stream_volume_index = ap_set_stream_volume_index;
    276     dap->policy.get_stream_volume_index = ap_get_stream_volume_index;
    277     dap->policy.set_stream_volume_index_for_device = ap_set_stream_volume_index_for_device;
    278     dap->policy.get_stream_volume_index_for_device = ap_get_stream_volume_index_for_device;
    279     dap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
    280     dap->policy.get_devices_for_stream = ap_get_devices_for_stream;
    281     dap->policy.get_output_for_effect = ap_get_output_for_effect;
    282     dap->policy.register_effect = ap_register_effect;
    283     dap->policy.unregister_effect = ap_unregister_effect;
    284     dap->policy.set_effect_enabled = ap_set_effect_enabled;
    285     dap->policy.is_stream_active = ap_is_stream_active;
    286     dap->policy.dump = ap_dump;
    287 
    288     dap->policy.is_offload_supported = ap_is_offload_supported;
    289 
    290     dap->service = service;
    291     dap->aps_ops = aps_ops;
    292 
    293     *ap = &dap->policy;
    294     return 0;
    295 }
    296 
    297 static int destroy_default_ap(const struct audio_policy_device *ap_dev,
    298                               struct audio_policy *ap)
    299 {
    300     free(ap);
    301     return 0;
    302 }
    303 
    304 static int default_ap_dev_close(hw_device_t* device)
    305 {
    306     free(device);
    307     return 0;
    308 }
    309 
    310 static int default_ap_dev_open(const hw_module_t* module, const char* name,
    311                                hw_device_t** device)
    312 {
    313     struct default_ap_device *dev;
    314 
    315     *device = NULL;
    316 
    317     if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
    318         return -EINVAL;
    319 
    320     dev = (struct default_ap_device *)calloc(1, sizeof(*dev));
    321     if (!dev)
    322         return -ENOMEM;
    323 
    324     dev->device.common.tag = HARDWARE_DEVICE_TAG;
    325     dev->device.common.version = 0;
    326     dev->device.common.module = (hw_module_t *)module;
    327     dev->device.common.close = default_ap_dev_close;
    328     dev->device.create_audio_policy = create_default_ap;
    329     dev->device.destroy_audio_policy = destroy_default_ap;
    330 
    331     *device = &dev->device.common;
    332 
    333     return 0;
    334 }
    335 
    336 static struct hw_module_methods_t default_ap_module_methods = {
    337     .open = default_ap_dev_open,
    338 };
    339 
    340 struct default_ap_module HAL_MODULE_INFO_SYM = {
    341     .module = {
    342         .common = {
    343             .tag            = HARDWARE_MODULE_TAG,
    344             .version_major  = 1,
    345             .version_minor  = 0,
    346             .id             = AUDIO_POLICY_HARDWARE_MODULE_ID,
    347             .name           = "Default audio policy HAL",
    348             .author         = "The Android Open Source Project",
    349             .methods        = &default_ap_module_methods,
    350         },
    351     },
    352 };
    353