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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 "legacy_audio_hw_hal"
     18 //#define LOG_NDEBUG 0
     19 
     20 #include <stdint.h>
     21 
     22 #include <hardware/hardware.h>
     23 #include <system/audio.h>
     24 #include <hardware/audio.h>
     25 
     26 #include <hardware_legacy/AudioHardwareInterface.h>
     27 #include <hardware_legacy/AudioSystemLegacy.h>
     28 
     29 namespace android_audio_legacy {
     30 
     31 extern "C" {
     32 
     33 struct legacy_audio_module {
     34     struct audio_module module;
     35 };
     36 
     37 struct legacy_audio_device {
     38     struct audio_hw_device device;
     39 
     40     struct AudioHardwareInterface *hwif;
     41 };
     42 
     43 struct legacy_stream_out {
     44     struct audio_stream_out stream;
     45 
     46     AudioStreamOut *legacy_out;
     47 };
     48 
     49 struct legacy_stream_in {
     50     struct audio_stream_in stream;
     51 
     52     AudioStreamIn *legacy_in;
     53 };
     54 
     55 /** audio_stream_out implementation **/
     56 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
     57 {
     58     const struct legacy_stream_out *out =
     59         reinterpret_cast<const struct legacy_stream_out *>(stream);
     60     return out->legacy_out->sampleRate();
     61 }
     62 
     63 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
     64 {
     65     struct legacy_stream_out *out =
     66         reinterpret_cast<struct legacy_stream_out *>(stream);
     67 
     68     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
     69     /* TODO: implement this */
     70     return 0;
     71 }
     72 
     73 static size_t out_get_buffer_size(const struct audio_stream *stream)
     74 {
     75     const struct legacy_stream_out *out =
     76         reinterpret_cast<const struct legacy_stream_out *>(stream);
     77     return out->legacy_out->bufferSize();
     78 }
     79 
     80 static uint32_t out_get_channels(const struct audio_stream *stream)
     81 {
     82     const struct legacy_stream_out *out =
     83         reinterpret_cast<const struct legacy_stream_out *>(stream);
     84     return out->legacy_out->channels();
     85 }
     86 
     87 static audio_format_t out_get_format(const struct audio_stream *stream)
     88 {
     89     const struct legacy_stream_out *out =
     90         reinterpret_cast<const struct legacy_stream_out *>(stream);
     91     // legacy API, don't change return type
     92     return (audio_format_t) out->legacy_out->format();
     93 }
     94 
     95 static int out_set_format(struct audio_stream *stream, audio_format_t format)
     96 {
     97     struct legacy_stream_out *out =
     98         reinterpret_cast<struct legacy_stream_out *>(stream);
     99     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    100     /* TODO: implement me */
    101     return 0;
    102 }
    103 
    104 static int out_standby(struct audio_stream *stream)
    105 {
    106     struct legacy_stream_out *out =
    107         reinterpret_cast<struct legacy_stream_out *>(stream);
    108     return out->legacy_out->standby();
    109 }
    110 
    111 static int out_dump(const struct audio_stream *stream, int fd)
    112 {
    113     const struct legacy_stream_out *out =
    114         reinterpret_cast<const struct legacy_stream_out *>(stream);
    115     Vector<String16> args;
    116     return out->legacy_out->dump(fd, args);
    117 }
    118 
    119 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
    120 {
    121     struct legacy_stream_out *out =
    122         reinterpret_cast<struct legacy_stream_out *>(stream);
    123     return out->legacy_out->setParameters(String8(kvpairs));
    124 }
    125 
    126 static char * out_get_parameters(const struct audio_stream *stream, const char *keys)
    127 {
    128     const struct legacy_stream_out *out =
    129         reinterpret_cast<const struct legacy_stream_out *>(stream);
    130     String8 s8;
    131     s8 = out->legacy_out->getParameters(String8(keys));
    132     return strdup(s8.string());
    133 }
    134 
    135 static uint32_t out_get_latency(const struct audio_stream_out *stream)
    136 {
    137     const struct legacy_stream_out *out =
    138         reinterpret_cast<const struct legacy_stream_out *>(stream);
    139     return out->legacy_out->latency();
    140 }
    141 
    142 static int out_set_volume(struct audio_stream_out *stream, float left,
    143                           float right)
    144 {
    145     struct legacy_stream_out *out =
    146         reinterpret_cast<struct legacy_stream_out *>(stream);
    147     return out->legacy_out->setVolume(left, right);
    148 }
    149 
    150 static ssize_t out_write(struct audio_stream_out *stream, const void* buffer,
    151                          size_t bytes)
    152 {
    153     struct legacy_stream_out *out =
    154         reinterpret_cast<struct legacy_stream_out *>(stream);
    155     return out->legacy_out->write(buffer, bytes);
    156 }
    157 
    158 static int out_get_render_position(const struct audio_stream_out *stream,
    159                                    uint32_t *dsp_frames)
    160 {
    161     const struct legacy_stream_out *out =
    162         reinterpret_cast<const struct legacy_stream_out *>(stream);
    163     return out->legacy_out->getRenderPosition(dsp_frames);
    164 }
    165 
    166 static int out_get_next_write_timestamp(const struct audio_stream_out *stream,
    167                                         int64_t *timestamp)
    168 {
    169     const struct legacy_stream_out *out =
    170         reinterpret_cast<const struct legacy_stream_out *>(stream);
    171     return out->legacy_out->getNextWriteTimestamp(timestamp);
    172 }
    173 
    174 static int out_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    175 {
    176     return 0;
    177 }
    178 
    179 static int out_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    180 {
    181     return 0;
    182 }
    183 
    184 /** audio_stream_in implementation **/
    185 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
    186 {
    187     const struct legacy_stream_in *in =
    188         reinterpret_cast<const struct legacy_stream_in *>(stream);
    189     return in->legacy_in->sampleRate();
    190 }
    191 
    192 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
    193 {
    194     struct legacy_stream_in *in =
    195         reinterpret_cast<struct legacy_stream_in *>(stream);
    196 
    197     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    198     /* TODO: implement this */
    199     return 0;
    200 }
    201 
    202 static size_t in_get_buffer_size(const struct audio_stream *stream)
    203 {
    204     const struct legacy_stream_in *in =
    205         reinterpret_cast<const struct legacy_stream_in *>(stream);
    206     return in->legacy_in->bufferSize();
    207 }
    208 
    209 static uint32_t in_get_channels(const struct audio_stream *stream)
    210 {
    211     const struct legacy_stream_in *in =
    212         reinterpret_cast<const struct legacy_stream_in *>(stream);
    213     return in->legacy_in->channels();
    214 }
    215 
    216 static audio_format_t in_get_format(const struct audio_stream *stream)
    217 {
    218     const struct legacy_stream_in *in =
    219         reinterpret_cast<const struct legacy_stream_in *>(stream);
    220     // legacy API, don't change return type
    221     return (audio_format_t) in->legacy_in->format();
    222 }
    223 
    224 static int in_set_format(struct audio_stream *stream, audio_format_t format)
    225 {
    226     struct legacy_stream_in *in =
    227         reinterpret_cast<struct legacy_stream_in *>(stream);
    228     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    229     /* TODO: implement me */
    230     return 0;
    231 }
    232 
    233 static int in_standby(struct audio_stream *stream)
    234 {
    235     struct legacy_stream_in *in = reinterpret_cast<struct legacy_stream_in *>(stream);
    236     return in->legacy_in->standby();
    237 }
    238 
    239 static int in_dump(const struct audio_stream *stream, int fd)
    240 {
    241     const struct legacy_stream_in *in =
    242         reinterpret_cast<const struct legacy_stream_in *>(stream);
    243     Vector<String16> args;
    244     return in->legacy_in->dump(fd, args);
    245 }
    246 
    247 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
    248 {
    249     struct legacy_stream_in *in =
    250         reinterpret_cast<struct legacy_stream_in *>(stream);
    251     return in->legacy_in->setParameters(String8(kvpairs));
    252 }
    253 
    254 static char * in_get_parameters(const struct audio_stream *stream,
    255                                 const char *keys)
    256 {
    257     const struct legacy_stream_in *in =
    258         reinterpret_cast<const struct legacy_stream_in *>(stream);
    259     String8 s8;
    260     s8 = in->legacy_in->getParameters(String8(keys));
    261     return strdup(s8.string());
    262 }
    263 
    264 static int in_set_gain(struct audio_stream_in *stream, float gain)
    265 {
    266     struct legacy_stream_in *in =
    267         reinterpret_cast<struct legacy_stream_in *>(stream);
    268     return in->legacy_in->setGain(gain);
    269 }
    270 
    271 static ssize_t in_read(struct audio_stream_in *stream, void* buffer,
    272                        size_t bytes)
    273 {
    274     struct legacy_stream_in *in =
    275         reinterpret_cast<struct legacy_stream_in *>(stream);
    276     return in->legacy_in->read(buffer, bytes);
    277 }
    278 
    279 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
    280 {
    281     struct legacy_stream_in *in =
    282         reinterpret_cast<struct legacy_stream_in *>(stream);
    283     return in->legacy_in->getInputFramesLost();
    284 }
    285 
    286 static int in_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    287 {
    288     const struct legacy_stream_in *in =
    289         reinterpret_cast<const struct legacy_stream_in *>(stream);
    290     return in->legacy_in->addAudioEffect(effect);
    291 }
    292 
    293 static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    294 {
    295     const struct legacy_stream_in *in =
    296         reinterpret_cast<const struct legacy_stream_in *>(stream);
    297     return in->legacy_in->removeAudioEffect(effect);
    298 }
    299 
    300 /** audio_hw_device implementation **/
    301 static inline struct legacy_audio_device * to_ladev(struct audio_hw_device *dev)
    302 {
    303     return reinterpret_cast<struct legacy_audio_device *>(dev);
    304 }
    305 
    306 static inline const struct legacy_audio_device * to_cladev(const struct audio_hw_device *dev)
    307 {
    308     return reinterpret_cast<const struct legacy_audio_device *>(dev);
    309 }
    310 
    311 static uint32_t adev_get_supported_devices(const struct audio_hw_device *dev)
    312 {
    313     /* XXX: The old AudioHardwareInterface interface is not smart enough to
    314      * tell us this, so we'll lie and basically tell AF that we support the
    315      * below input/output devices and cross our fingers. To do things properly,
    316      * audio hardware interfaces that need advanced features (like this) should
    317      * convert to the new HAL interface and not use this wrapper. */
    318 
    319     return (/* OUT */
    320             AUDIO_DEVICE_OUT_EARPIECE |
    321             AUDIO_DEVICE_OUT_SPEAKER |
    322             AUDIO_DEVICE_OUT_WIRED_HEADSET |
    323             AUDIO_DEVICE_OUT_WIRED_HEADPHONE |
    324             AUDIO_DEVICE_OUT_AUX_DIGITAL |
    325             AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET |
    326             AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET |
    327             AUDIO_DEVICE_OUT_ALL_SCO |
    328             AUDIO_DEVICE_OUT_DEFAULT |
    329             /* IN */
    330             AUDIO_DEVICE_IN_COMMUNICATION |
    331             AUDIO_DEVICE_IN_AMBIENT |
    332             AUDIO_DEVICE_IN_BUILTIN_MIC |
    333             AUDIO_DEVICE_IN_WIRED_HEADSET |
    334             AUDIO_DEVICE_IN_AUX_DIGITAL |
    335             AUDIO_DEVICE_IN_BACK_MIC |
    336             AUDIO_DEVICE_IN_ALL_SCO |
    337             AUDIO_DEVICE_IN_DEFAULT);
    338 }
    339 
    340 static int adev_init_check(const struct audio_hw_device *dev)
    341 {
    342     const struct legacy_audio_device *ladev = to_cladev(dev);
    343 
    344     return ladev->hwif->initCheck();
    345 }
    346 
    347 static int adev_set_voice_volume(struct audio_hw_device *dev, float volume)
    348 {
    349     struct legacy_audio_device *ladev = to_ladev(dev);
    350     return ladev->hwif->setVoiceVolume(volume);
    351 }
    352 
    353 static int adev_set_master_volume(struct audio_hw_device *dev, float volume)
    354 {
    355     struct legacy_audio_device *ladev = to_ladev(dev);
    356     return ladev->hwif->setMasterVolume(volume);
    357 }
    358 
    359 static int adev_get_master_volume(struct audio_hw_device *dev, float* volume)
    360 {
    361     struct legacy_audio_device *ladev = to_ladev(dev);
    362     return ladev->hwif->getMasterVolume(volume);
    363 }
    364 
    365 static int adev_set_mode(struct audio_hw_device *dev, audio_mode_t mode)
    366 {
    367     struct legacy_audio_device *ladev = to_ladev(dev);
    368     // as this is the legacy API, don't change it to use audio_mode_t instead of int
    369     return ladev->hwif->setMode((int) mode);
    370 }
    371 
    372 static int adev_set_mic_mute(struct audio_hw_device *dev, bool state)
    373 {
    374     struct legacy_audio_device *ladev = to_ladev(dev);
    375     return ladev->hwif->setMicMute(state);
    376 }
    377 
    378 static int adev_get_mic_mute(const struct audio_hw_device *dev, bool *state)
    379 {
    380     const struct legacy_audio_device *ladev = to_cladev(dev);
    381     return ladev->hwif->getMicMute(state);
    382 }
    383 
    384 static int adev_set_parameters(struct audio_hw_device *dev, const char *kvpairs)
    385 {
    386     struct legacy_audio_device *ladev = to_ladev(dev);
    387     return ladev->hwif->setParameters(String8(kvpairs));
    388 }
    389 
    390 static char * adev_get_parameters(const struct audio_hw_device *dev,
    391                                   const char *keys)
    392 {
    393     const struct legacy_audio_device *ladev = to_cladev(dev);
    394     String8 s8;
    395 
    396     s8 = ladev->hwif->getParameters(String8(keys));
    397     return strdup(s8.string());
    398 }
    399 
    400 static size_t adev_get_input_buffer_size(const struct audio_hw_device *dev,
    401                                          const struct audio_config *config)
    402 {
    403     const struct legacy_audio_device *ladev = to_cladev(dev);
    404     return ladev->hwif->getInputBufferSize(config->sample_rate, (int) config->format,
    405                                            popcount(config->channel_mask));
    406 }
    407 
    408 static int adev_open_output_stream(struct audio_hw_device *dev,
    409                                    audio_io_handle_t handle,
    410                                    audio_devices_t devices,
    411                                    audio_output_flags_t flags,
    412                                    struct audio_config *config,
    413                                    struct audio_stream_out **stream_out)
    414 {
    415     struct legacy_audio_device *ladev = to_ladev(dev);
    416     status_t status;
    417     struct legacy_stream_out *out;
    418     int ret;
    419 
    420     out = (struct legacy_stream_out *)calloc(1, sizeof(*out));
    421     if (!out)
    422         return -ENOMEM;
    423 
    424     out->legacy_out = ladev->hwif->openOutputStream(devices, (int *) &config->format,
    425                                                     &config->channel_mask,
    426                                                     &config->sample_rate, &status);
    427     if (!out->legacy_out) {
    428         ret = status;
    429         goto err_open;
    430     }
    431 
    432     out->stream.common.get_sample_rate = out_get_sample_rate;
    433     out->stream.common.set_sample_rate = out_set_sample_rate;
    434     out->stream.common.get_buffer_size = out_get_buffer_size;
    435     out->stream.common.get_channels = out_get_channels;
    436     out->stream.common.get_format = out_get_format;
    437     out->stream.common.set_format = out_set_format;
    438     out->stream.common.standby = out_standby;
    439     out->stream.common.dump = out_dump;
    440     out->stream.common.set_parameters = out_set_parameters;
    441     out->stream.common.get_parameters = out_get_parameters;
    442     out->stream.common.add_audio_effect = out_add_audio_effect;
    443     out->stream.common.remove_audio_effect = out_remove_audio_effect;
    444     out->stream.get_latency = out_get_latency;
    445     out->stream.set_volume = out_set_volume;
    446     out->stream.write = out_write;
    447     out->stream.get_render_position = out_get_render_position;
    448     out->stream.get_next_write_timestamp = out_get_next_write_timestamp;
    449 
    450     *stream_out = &out->stream;
    451     return 0;
    452 
    453 err_open:
    454     free(out);
    455     *stream_out = NULL;
    456     return ret;
    457 }
    458 
    459 static void adev_close_output_stream(struct audio_hw_device *dev,
    460                                      struct audio_stream_out* stream)
    461 {
    462     struct legacy_audio_device *ladev = to_ladev(dev);
    463     struct legacy_stream_out *out = reinterpret_cast<struct legacy_stream_out *>(stream);
    464 
    465     ladev->hwif->closeOutputStream(out->legacy_out);
    466     free(out);
    467 }
    468 
    469 /** This method creates and opens the audio hardware input stream */
    470 static int adev_open_input_stream(struct audio_hw_device *dev,
    471                                   audio_io_handle_t handle,
    472                                   audio_devices_t devices,
    473                                   struct audio_config *config,
    474                                   struct audio_stream_in **stream_in)
    475 {
    476     struct legacy_audio_device *ladev = to_ladev(dev);
    477     status_t status;
    478     struct legacy_stream_in *in;
    479     int ret;
    480 
    481     in = (struct legacy_stream_in *)calloc(1, sizeof(*in));
    482     if (!in)
    483         return -ENOMEM;
    484 
    485     in->legacy_in = ladev->hwif->openInputStream(devices, (int *) &config->format,
    486                                                  &config->channel_mask, &config->sample_rate,
    487                                                  &status, (AudioSystem::audio_in_acoustics)0);
    488     if (!in->legacy_in) {
    489         ret = status;
    490         goto err_open;
    491     }
    492 
    493     in->stream.common.get_sample_rate = in_get_sample_rate;
    494     in->stream.common.set_sample_rate = in_set_sample_rate;
    495     in->stream.common.get_buffer_size = in_get_buffer_size;
    496     in->stream.common.get_channels = in_get_channels;
    497     in->stream.common.get_format = in_get_format;
    498     in->stream.common.set_format = in_set_format;
    499     in->stream.common.standby = in_standby;
    500     in->stream.common.dump = in_dump;
    501     in->stream.common.set_parameters = in_set_parameters;
    502     in->stream.common.get_parameters = in_get_parameters;
    503     in->stream.common.add_audio_effect = in_add_audio_effect;
    504     in->stream.common.remove_audio_effect = in_remove_audio_effect;
    505     in->stream.set_gain = in_set_gain;
    506     in->stream.read = in_read;
    507     in->stream.get_input_frames_lost = in_get_input_frames_lost;
    508 
    509     *stream_in = &in->stream;
    510     return 0;
    511 
    512 err_open:
    513     free(in);
    514     *stream_in = NULL;
    515     return ret;
    516 }
    517 
    518 static void adev_close_input_stream(struct audio_hw_device *dev,
    519                                struct audio_stream_in *stream)
    520 {
    521     struct legacy_audio_device *ladev = to_ladev(dev);
    522     struct legacy_stream_in *in =
    523         reinterpret_cast<struct legacy_stream_in *>(stream);
    524 
    525     ladev->hwif->closeInputStream(in->legacy_in);
    526     free(in);
    527 }
    528 
    529 static int adev_dump(const struct audio_hw_device *dev, int fd)
    530 {
    531     const struct legacy_audio_device *ladev = to_cladev(dev);
    532     Vector<String16> args;
    533 
    534     return ladev->hwif->dumpState(fd, args);
    535 }
    536 
    537 static int legacy_adev_close(hw_device_t* device)
    538 {
    539     struct audio_hw_device *hwdev =
    540                         reinterpret_cast<struct audio_hw_device *>(device);
    541     struct legacy_audio_device *ladev = to_ladev(hwdev);
    542 
    543     if (!ladev)
    544         return 0;
    545 
    546     if (ladev->hwif)
    547         delete ladev->hwif;
    548 
    549     free(ladev);
    550     return 0;
    551 }
    552 
    553 static int legacy_adev_open(const hw_module_t* module, const char* name,
    554                             hw_device_t** device)
    555 {
    556     struct legacy_audio_device *ladev;
    557     int ret;
    558 
    559     if (strcmp(name, AUDIO_HARDWARE_INTERFACE) != 0)
    560         return -EINVAL;
    561 
    562     ladev = (struct legacy_audio_device *)calloc(1, sizeof(*ladev));
    563     if (!ladev)
    564         return -ENOMEM;
    565 
    566     ladev->device.common.tag = HARDWARE_DEVICE_TAG;
    567     ladev->device.common.version = AUDIO_DEVICE_API_VERSION_1_0;
    568     ladev->device.common.module = const_cast<hw_module_t*>(module);
    569     ladev->device.common.close = legacy_adev_close;
    570 
    571     ladev->device.get_supported_devices = adev_get_supported_devices;
    572     ladev->device.init_check = adev_init_check;
    573     ladev->device.set_voice_volume = adev_set_voice_volume;
    574     ladev->device.set_master_volume = adev_set_master_volume;
    575     ladev->device.get_master_volume = adev_get_master_volume;
    576     ladev->device.set_mode = adev_set_mode;
    577     ladev->device.set_mic_mute = adev_set_mic_mute;
    578     ladev->device.get_mic_mute = adev_get_mic_mute;
    579     ladev->device.set_parameters = adev_set_parameters;
    580     ladev->device.get_parameters = adev_get_parameters;
    581     ladev->device.get_input_buffer_size = adev_get_input_buffer_size;
    582     ladev->device.open_output_stream = adev_open_output_stream;
    583     ladev->device.close_output_stream = adev_close_output_stream;
    584     ladev->device.open_input_stream = adev_open_input_stream;
    585     ladev->device.close_input_stream = adev_close_input_stream;
    586     ladev->device.dump = adev_dump;
    587 
    588     ladev->hwif = createAudioHardware();
    589     if (!ladev->hwif) {
    590         ret = -EIO;
    591         goto err_create_audio_hw;
    592     }
    593 
    594     *device = &ladev->device.common;
    595 
    596     return 0;
    597 
    598 err_create_audio_hw:
    599     free(ladev);
    600     return ret;
    601 }
    602 
    603 static struct hw_module_methods_t legacy_audio_module_methods = {
    604         open: legacy_adev_open
    605 };
    606 
    607 struct legacy_audio_module HAL_MODULE_INFO_SYM = {
    608     module: {
    609         common: {
    610             tag: HARDWARE_MODULE_TAG,
    611             module_api_version: AUDIO_MODULE_API_VERSION_0_1,
    612             hal_api_version: HARDWARE_HAL_API_VERSION,
    613             id: AUDIO_HARDWARE_MODULE_ID,
    614             name: "LEGACY Audio HW HAL",
    615             author: "The Android Open Source Project",
    616             methods: &legacy_audio_module_methods,
    617             dso : NULL,
    618             reserved : {0},
    619         },
    620     },
    621 };
    622 
    623 }; // extern "C"
    624 
    625 }; // namespace android_audio_legacy
    626