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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 
     56 enum {
     57     HAL_API_REV_1_0,
     58     HAL_API_REV_2_0,
     59     HAL_API_REV_NUM
     60 } hal_api_rev;
     61 
     62 static uint32_t audio_device_conv_table[][HAL_API_REV_NUM] =
     63 {
     64     /* output devices */
     65     { AudioSystem::DEVICE_OUT_EARPIECE, AUDIO_DEVICE_OUT_EARPIECE },
     66     { AudioSystem::DEVICE_OUT_SPEAKER, AUDIO_DEVICE_OUT_SPEAKER },
     67     { AudioSystem::DEVICE_OUT_WIRED_HEADSET, AUDIO_DEVICE_OUT_WIRED_HEADSET },
     68     { AudioSystem::DEVICE_OUT_WIRED_HEADPHONE, AUDIO_DEVICE_OUT_WIRED_HEADPHONE },
     69     { AudioSystem::DEVICE_OUT_BLUETOOTH_SCO, AUDIO_DEVICE_OUT_BLUETOOTH_SCO },
     70     { AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET, AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET },
     71     { AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT, AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT },
     72     { AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP, AUDIO_DEVICE_OUT_BLUETOOTH_A2DP },
     73     { AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES, AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES },
     74     { AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER, AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER },
     75     { AudioSystem::DEVICE_OUT_AUX_DIGITAL, AUDIO_DEVICE_OUT_AUX_DIGITAL },
     76     { AudioSystem::DEVICE_OUT_ANLG_DOCK_HEADSET, AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET },
     77     { AudioSystem::DEVICE_OUT_DGTL_DOCK_HEADSET, AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET },
     78     { AudioSystem::DEVICE_OUT_DEFAULT, AUDIO_DEVICE_OUT_DEFAULT },
     79     /* input devices */
     80     { AudioSystem::DEVICE_IN_COMMUNICATION, AUDIO_DEVICE_IN_COMMUNICATION },
     81     { AudioSystem::DEVICE_IN_AMBIENT, AUDIO_DEVICE_IN_AMBIENT },
     82     { AudioSystem::DEVICE_IN_BUILTIN_MIC, AUDIO_DEVICE_IN_BUILTIN_MIC },
     83     { AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET, AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET },
     84     { AudioSystem::DEVICE_IN_WIRED_HEADSET, AUDIO_DEVICE_IN_WIRED_HEADSET },
     85     { AudioSystem::DEVICE_IN_AUX_DIGITAL, AUDIO_DEVICE_IN_AUX_DIGITAL },
     86     { AudioSystem::DEVICE_IN_VOICE_CALL, AUDIO_DEVICE_IN_VOICE_CALL },
     87     { AudioSystem::DEVICE_IN_BACK_MIC, AUDIO_DEVICE_IN_BACK_MIC },
     88     { AudioSystem::DEVICE_IN_DEFAULT, AUDIO_DEVICE_IN_DEFAULT },
     89 };
     90 
     91 static uint32_t convert_audio_device(uint32_t from_device, int from_rev, int to_rev)
     92 {
     93     const uint32_t k_num_devices = sizeof(audio_device_conv_table)/sizeof(uint32_t)/HAL_API_REV_NUM;
     94     uint32_t to_device = AUDIO_DEVICE_NONE;
     95     uint32_t in_bit = 0;
     96 
     97     if (from_rev != HAL_API_REV_1_0) {
     98         in_bit = from_device & AUDIO_DEVICE_BIT_IN;
     99         from_device &= ~AUDIO_DEVICE_BIT_IN;
    100     }
    101 
    102     while (from_device) {
    103         uint32_t i = 31 - __builtin_clz(from_device);
    104         uint32_t cur_device = (1 << i) | in_bit;
    105 
    106         for (i = 0; i < k_num_devices; i++) {
    107             if (audio_device_conv_table[i][from_rev] == cur_device) {
    108                 to_device |= audio_device_conv_table[i][to_rev];
    109                 break;
    110             }
    111         }
    112         from_device &= ~cur_device;
    113     }
    114     return to_device;
    115 }
    116 
    117 
    118 /** audio_stream_out implementation **/
    119 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
    120 {
    121     const struct legacy_stream_out *out =
    122         reinterpret_cast<const struct legacy_stream_out *>(stream);
    123     return out->legacy_out->sampleRate();
    124 }
    125 
    126 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
    127 {
    128     struct legacy_stream_out *out =
    129         reinterpret_cast<struct legacy_stream_out *>(stream);
    130 
    131     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    132     /* TODO: implement this */
    133     return 0;
    134 }
    135 
    136 static size_t out_get_buffer_size(const struct audio_stream *stream)
    137 {
    138     const struct legacy_stream_out *out =
    139         reinterpret_cast<const struct legacy_stream_out *>(stream);
    140     return out->legacy_out->bufferSize();
    141 }
    142 
    143 static audio_channel_mask_t out_get_channels(const struct audio_stream *stream)
    144 {
    145     const struct legacy_stream_out *out =
    146         reinterpret_cast<const struct legacy_stream_out *>(stream);
    147     return (audio_channel_mask_t) out->legacy_out->channels();
    148 }
    149 
    150 static audio_format_t out_get_format(const struct audio_stream *stream)
    151 {
    152     const struct legacy_stream_out *out =
    153         reinterpret_cast<const struct legacy_stream_out *>(stream);
    154     // legacy API, don't change return type
    155     return (audio_format_t) out->legacy_out->format();
    156 }
    157 
    158 static int out_set_format(struct audio_stream *stream, audio_format_t format)
    159 {
    160     struct legacy_stream_out *out =
    161         reinterpret_cast<struct legacy_stream_out *>(stream);
    162     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    163     /* TODO: implement me */
    164     return 0;
    165 }
    166 
    167 static int out_standby(struct audio_stream *stream)
    168 {
    169     struct legacy_stream_out *out =
    170         reinterpret_cast<struct legacy_stream_out *>(stream);
    171     return out->legacy_out->standby();
    172 }
    173 
    174 static int out_dump(const struct audio_stream *stream, int fd)
    175 {
    176     const struct legacy_stream_out *out =
    177         reinterpret_cast<const struct legacy_stream_out *>(stream);
    178     Vector<String16> args;
    179     return out->legacy_out->dump(fd, args);
    180 }
    181 
    182 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
    183 {
    184     struct legacy_stream_out *out =
    185         reinterpret_cast<struct legacy_stream_out *>(stream);
    186     int val;
    187     String8 s8 = String8(kvpairs);
    188     AudioParameter parms = AudioParameter(String8(kvpairs));
    189 
    190     if (parms.getInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val) == NO_ERROR) {
    191         val = convert_audio_device(val, HAL_API_REV_2_0, HAL_API_REV_1_0);
    192         parms.remove(String8(AUDIO_PARAMETER_STREAM_ROUTING));
    193         parms.addInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val);
    194         s8 = parms.toString();
    195     }
    196 
    197     return out->legacy_out->setParameters(s8);
    198 }
    199 
    200 static char * out_get_parameters(const struct audio_stream *stream, const char *keys)
    201 {
    202     const struct legacy_stream_out *out =
    203         reinterpret_cast<const struct legacy_stream_out *>(stream);
    204     String8 s8;
    205     int val;
    206 
    207     s8 = out->legacy_out->getParameters(String8(keys));
    208 
    209     AudioParameter parms = AudioParameter(s8);
    210     if (parms.getInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val) == NO_ERROR) {
    211         val = convert_audio_device(val, HAL_API_REV_1_0, HAL_API_REV_2_0);
    212         parms.remove(String8(AUDIO_PARAMETER_STREAM_ROUTING));
    213         parms.addInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val);
    214         s8 = parms.toString();
    215     }
    216 
    217     return strdup(s8.string());
    218 }
    219 
    220 static uint32_t out_get_latency(const struct audio_stream_out *stream)
    221 {
    222     const struct legacy_stream_out *out =
    223         reinterpret_cast<const struct legacy_stream_out *>(stream);
    224     return out->legacy_out->latency();
    225 }
    226 
    227 static int out_set_volume(struct audio_stream_out *stream, float left,
    228                           float right)
    229 {
    230     struct legacy_stream_out *out =
    231         reinterpret_cast<struct legacy_stream_out *>(stream);
    232     return out->legacy_out->setVolume(left, right);
    233 }
    234 
    235 static ssize_t out_write(struct audio_stream_out *stream, const void* buffer,
    236                          size_t bytes)
    237 {
    238     struct legacy_stream_out *out =
    239         reinterpret_cast<struct legacy_stream_out *>(stream);
    240     return out->legacy_out->write(buffer, bytes);
    241 }
    242 
    243 static int out_get_render_position(const struct audio_stream_out *stream,
    244                                    uint32_t *dsp_frames)
    245 {
    246     const struct legacy_stream_out *out =
    247         reinterpret_cast<const struct legacy_stream_out *>(stream);
    248     return out->legacy_out->getRenderPosition(dsp_frames);
    249 }
    250 
    251 static int out_get_next_write_timestamp(const struct audio_stream_out *stream,
    252                                         int64_t *timestamp)
    253 {
    254     const struct legacy_stream_out *out =
    255         reinterpret_cast<const struct legacy_stream_out *>(stream);
    256     return out->legacy_out->getNextWriteTimestamp(timestamp);
    257 }
    258 
    259 static int out_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    260 {
    261     return 0;
    262 }
    263 
    264 static int out_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    265 {
    266     return 0;
    267 }
    268 
    269 /** audio_stream_in implementation **/
    270 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
    271 {
    272     const struct legacy_stream_in *in =
    273         reinterpret_cast<const struct legacy_stream_in *>(stream);
    274     return in->legacy_in->sampleRate();
    275 }
    276 
    277 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
    278 {
    279     struct legacy_stream_in *in =
    280         reinterpret_cast<struct legacy_stream_in *>(stream);
    281 
    282     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    283     /* TODO: implement this */
    284     return 0;
    285 }
    286 
    287 static size_t in_get_buffer_size(const struct audio_stream *stream)
    288 {
    289     const struct legacy_stream_in *in =
    290         reinterpret_cast<const struct legacy_stream_in *>(stream);
    291     return in->legacy_in->bufferSize();
    292 }
    293 
    294 static audio_channel_mask_t in_get_channels(const struct audio_stream *stream)
    295 {
    296     const struct legacy_stream_in *in =
    297         reinterpret_cast<const struct legacy_stream_in *>(stream);
    298     return (audio_channel_mask_t) in->legacy_in->channels();
    299 }
    300 
    301 static audio_format_t in_get_format(const struct audio_stream *stream)
    302 {
    303     const struct legacy_stream_in *in =
    304         reinterpret_cast<const struct legacy_stream_in *>(stream);
    305     // legacy API, don't change return type
    306     return (audio_format_t) in->legacy_in->format();
    307 }
    308 
    309 static int in_set_format(struct audio_stream *stream, audio_format_t format)
    310 {
    311     struct legacy_stream_in *in =
    312         reinterpret_cast<struct legacy_stream_in *>(stream);
    313     ALOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
    314     /* TODO: implement me */
    315     return 0;
    316 }
    317 
    318 static int in_standby(struct audio_stream *stream)
    319 {
    320     struct legacy_stream_in *in = reinterpret_cast<struct legacy_stream_in *>(stream);
    321     return in->legacy_in->standby();
    322 }
    323 
    324 static int in_dump(const struct audio_stream *stream, int fd)
    325 {
    326     const struct legacy_stream_in *in =
    327         reinterpret_cast<const struct legacy_stream_in *>(stream);
    328     Vector<String16> args;
    329     return in->legacy_in->dump(fd, args);
    330 }
    331 
    332 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
    333 {
    334     struct legacy_stream_in *in =
    335         reinterpret_cast<struct legacy_stream_in *>(stream);
    336     int val;
    337     AudioParameter parms = AudioParameter(String8(kvpairs));
    338     String8 s8 = String8(kvpairs);
    339 
    340     if (parms.getInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val) == NO_ERROR) {
    341         val = convert_audio_device(val, HAL_API_REV_2_0, HAL_API_REV_1_0);
    342         parms.remove(String8(AUDIO_PARAMETER_STREAM_ROUTING));
    343         parms.addInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val);
    344         s8 = parms.toString();
    345     }
    346 
    347     return in->legacy_in->setParameters(s8);
    348 }
    349 
    350 static char * in_get_parameters(const struct audio_stream *stream,
    351                                 const char *keys)
    352 {
    353     const struct legacy_stream_in *in =
    354         reinterpret_cast<const struct legacy_stream_in *>(stream);
    355     String8 s8;
    356     int val;
    357 
    358     s8 = in->legacy_in->getParameters(String8(keys));
    359 
    360     AudioParameter parms = AudioParameter(s8);
    361     if (parms.getInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val) == NO_ERROR) {
    362         val = convert_audio_device(val, HAL_API_REV_1_0, HAL_API_REV_2_0);
    363         parms.remove(String8(AUDIO_PARAMETER_STREAM_ROUTING));
    364         parms.addInt(String8(AUDIO_PARAMETER_STREAM_ROUTING), val);
    365         s8 = parms.toString();
    366     }
    367 
    368     return strdup(s8.string());
    369 }
    370 
    371 static int in_set_gain(struct audio_stream_in *stream, float gain)
    372 {
    373     struct legacy_stream_in *in =
    374         reinterpret_cast<struct legacy_stream_in *>(stream);
    375     return in->legacy_in->setGain(gain);
    376 }
    377 
    378 static ssize_t in_read(struct audio_stream_in *stream, void* buffer,
    379                        size_t bytes)
    380 {
    381     struct legacy_stream_in *in =
    382         reinterpret_cast<struct legacy_stream_in *>(stream);
    383     return in->legacy_in->read(buffer, bytes);
    384 }
    385 
    386 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
    387 {
    388     struct legacy_stream_in *in =
    389         reinterpret_cast<struct legacy_stream_in *>(stream);
    390     return in->legacy_in->getInputFramesLost();
    391 }
    392 
    393 static int in_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    394 {
    395     const struct legacy_stream_in *in =
    396         reinterpret_cast<const struct legacy_stream_in *>(stream);
    397     return in->legacy_in->addAudioEffect(effect);
    398 }
    399 
    400 static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
    401 {
    402     const struct legacy_stream_in *in =
    403         reinterpret_cast<const struct legacy_stream_in *>(stream);
    404     return in->legacy_in->removeAudioEffect(effect);
    405 }
    406 
    407 /** audio_hw_device implementation **/
    408 static inline struct legacy_audio_device * to_ladev(struct audio_hw_device *dev)
    409 {
    410     return reinterpret_cast<struct legacy_audio_device *>(dev);
    411 }
    412 
    413 static inline const struct legacy_audio_device * to_cladev(const struct audio_hw_device *dev)
    414 {
    415     return reinterpret_cast<const struct legacy_audio_device *>(dev);
    416 }
    417 
    418 static int adev_init_check(const struct audio_hw_device *dev)
    419 {
    420     const struct legacy_audio_device *ladev = to_cladev(dev);
    421 
    422     return ladev->hwif->initCheck();
    423 }
    424 
    425 static int adev_set_voice_volume(struct audio_hw_device *dev, float volume)
    426 {
    427     struct legacy_audio_device *ladev = to_ladev(dev);
    428     return ladev->hwif->setVoiceVolume(volume);
    429 }
    430 
    431 static int adev_set_master_volume(struct audio_hw_device *dev, float volume)
    432 {
    433     struct legacy_audio_device *ladev = to_ladev(dev);
    434     return ladev->hwif->setMasterVolume(volume);
    435 }
    436 
    437 static int adev_get_master_volume(struct audio_hw_device *dev, float* volume)
    438 {
    439     struct legacy_audio_device *ladev = to_ladev(dev);
    440     return ladev->hwif->getMasterVolume(volume);
    441 }
    442 
    443 static int adev_set_mode(struct audio_hw_device *dev, audio_mode_t mode)
    444 {
    445     struct legacy_audio_device *ladev = to_ladev(dev);
    446     // as this is the legacy API, don't change it to use audio_mode_t instead of int
    447     return ladev->hwif->setMode((int) mode);
    448 }
    449 
    450 static int adev_set_mic_mute(struct audio_hw_device *dev, bool state)
    451 {
    452     struct legacy_audio_device *ladev = to_ladev(dev);
    453     return ladev->hwif->setMicMute(state);
    454 }
    455 
    456 static int adev_get_mic_mute(const struct audio_hw_device *dev, bool *state)
    457 {
    458     const struct legacy_audio_device *ladev = to_cladev(dev);
    459     return ladev->hwif->getMicMute(state);
    460 }
    461 
    462 static int adev_set_parameters(struct audio_hw_device *dev, const char *kvpairs)
    463 {
    464     struct legacy_audio_device *ladev = to_ladev(dev);
    465     return ladev->hwif->setParameters(String8(kvpairs));
    466 }
    467 
    468 static char * adev_get_parameters(const struct audio_hw_device *dev,
    469                                   const char *keys)
    470 {
    471     const struct legacy_audio_device *ladev = to_cladev(dev);
    472     String8 s8;
    473 
    474     s8 = ladev->hwif->getParameters(String8(keys));
    475     return strdup(s8.string());
    476 }
    477 
    478 static size_t adev_get_input_buffer_size(const struct audio_hw_device *dev,
    479                                          const struct audio_config *config)
    480 {
    481     const struct legacy_audio_device *ladev = to_cladev(dev);
    482     return ladev->hwif->getInputBufferSize(config->sample_rate, (int) config->format,
    483                                            popcount(config->channel_mask));
    484 }
    485 
    486 static int adev_open_output_stream(struct audio_hw_device *dev,
    487                                    audio_io_handle_t handle,
    488                                    audio_devices_t devices,
    489                                    audio_output_flags_t flags,
    490                                    struct audio_config *config,
    491                                    struct audio_stream_out **stream_out)
    492 {
    493     struct legacy_audio_device *ladev = to_ladev(dev);
    494     status_t status;
    495     struct legacy_stream_out *out;
    496     int ret;
    497 
    498     out = (struct legacy_stream_out *)calloc(1, sizeof(*out));
    499     if (!out)
    500         return -ENOMEM;
    501 
    502     devices = convert_audio_device(devices, HAL_API_REV_2_0, HAL_API_REV_1_0);
    503 
    504     out->legacy_out = ladev->hwif->openOutputStream(devices, (int *) &config->format,
    505                                                     &config->channel_mask,
    506                                                     &config->sample_rate, &status);
    507     if (!out->legacy_out) {
    508         ret = status;
    509         goto err_open;
    510     }
    511 
    512     out->stream.common.get_sample_rate = out_get_sample_rate;
    513     out->stream.common.set_sample_rate = out_set_sample_rate;
    514     out->stream.common.get_buffer_size = out_get_buffer_size;
    515     out->stream.common.get_channels = out_get_channels;
    516     out->stream.common.get_format = out_get_format;
    517     out->stream.common.set_format = out_set_format;
    518     out->stream.common.standby = out_standby;
    519     out->stream.common.dump = out_dump;
    520     out->stream.common.set_parameters = out_set_parameters;
    521     out->stream.common.get_parameters = out_get_parameters;
    522     out->stream.common.add_audio_effect = out_add_audio_effect;
    523     out->stream.common.remove_audio_effect = out_remove_audio_effect;
    524     out->stream.get_latency = out_get_latency;
    525     out->stream.set_volume = out_set_volume;
    526     out->stream.write = out_write;
    527     out->stream.get_render_position = out_get_render_position;
    528     out->stream.get_next_write_timestamp = out_get_next_write_timestamp;
    529 
    530     *stream_out = &out->stream;
    531     return 0;
    532 
    533 err_open:
    534     free(out);
    535     *stream_out = NULL;
    536     return ret;
    537 }
    538 
    539 static void adev_close_output_stream(struct audio_hw_device *dev,
    540                                      struct audio_stream_out* stream)
    541 {
    542     struct legacy_audio_device *ladev = to_ladev(dev);
    543     struct legacy_stream_out *out = reinterpret_cast<struct legacy_stream_out *>(stream);
    544 
    545     ladev->hwif->closeOutputStream(out->legacy_out);
    546     free(out);
    547 }
    548 
    549 /** This method creates and opens the audio hardware input stream */
    550 static int adev_open_input_stream(struct audio_hw_device *dev,
    551                                   audio_io_handle_t handle,
    552                                   audio_devices_t devices,
    553                                   struct audio_config *config,
    554                                   struct audio_stream_in **stream_in)
    555 {
    556     struct legacy_audio_device *ladev = to_ladev(dev);
    557     status_t status;
    558     struct legacy_stream_in *in;
    559     int ret;
    560 
    561     in = (struct legacy_stream_in *)calloc(1, sizeof(*in));
    562     if (!in)
    563         return -ENOMEM;
    564 
    565     devices = convert_audio_device(devices, HAL_API_REV_2_0, HAL_API_REV_1_0);
    566 
    567     in->legacy_in = ladev->hwif->openInputStream(devices, (int *) &config->format,
    568                                                  &config->channel_mask, &config->sample_rate,
    569                                                  &status, (AudioSystem::audio_in_acoustics)0);
    570     if (!in->legacy_in) {
    571         ret = status;
    572         goto err_open;
    573     }
    574 
    575     in->stream.common.get_sample_rate = in_get_sample_rate;
    576     in->stream.common.set_sample_rate = in_set_sample_rate;
    577     in->stream.common.get_buffer_size = in_get_buffer_size;
    578     in->stream.common.get_channels = in_get_channels;
    579     in->stream.common.get_format = in_get_format;
    580     in->stream.common.set_format = in_set_format;
    581     in->stream.common.standby = in_standby;
    582     in->stream.common.dump = in_dump;
    583     in->stream.common.set_parameters = in_set_parameters;
    584     in->stream.common.get_parameters = in_get_parameters;
    585     in->stream.common.add_audio_effect = in_add_audio_effect;
    586     in->stream.common.remove_audio_effect = in_remove_audio_effect;
    587     in->stream.set_gain = in_set_gain;
    588     in->stream.read = in_read;
    589     in->stream.get_input_frames_lost = in_get_input_frames_lost;
    590 
    591     *stream_in = &in->stream;
    592     return 0;
    593 
    594 err_open:
    595     free(in);
    596     *stream_in = NULL;
    597     return ret;
    598 }
    599 
    600 static void adev_close_input_stream(struct audio_hw_device *dev,
    601                                struct audio_stream_in *stream)
    602 {
    603     struct legacy_audio_device *ladev = to_ladev(dev);
    604     struct legacy_stream_in *in =
    605         reinterpret_cast<struct legacy_stream_in *>(stream);
    606 
    607     ladev->hwif->closeInputStream(in->legacy_in);
    608     free(in);
    609 }
    610 
    611 static int adev_dump(const struct audio_hw_device *dev, int fd)
    612 {
    613     const struct legacy_audio_device *ladev = to_cladev(dev);
    614     Vector<String16> args;
    615 
    616     return ladev->hwif->dumpState(fd, args);
    617 }
    618 
    619 static int legacy_adev_close(hw_device_t* device)
    620 {
    621     struct audio_hw_device *hwdev =
    622                         reinterpret_cast<struct audio_hw_device *>(device);
    623     struct legacy_audio_device *ladev = to_ladev(hwdev);
    624 
    625     if (!ladev)
    626         return 0;
    627 
    628     if (ladev->hwif)
    629         delete ladev->hwif;
    630 
    631     free(ladev);
    632     return 0;
    633 }
    634 
    635 static int legacy_adev_open(const hw_module_t* module, const char* name,
    636                             hw_device_t** device)
    637 {
    638     struct legacy_audio_device *ladev;
    639     int ret;
    640 
    641     if (strcmp(name, AUDIO_HARDWARE_INTERFACE) != 0)
    642         return -EINVAL;
    643 
    644     ladev = (struct legacy_audio_device *)calloc(1, sizeof(*ladev));
    645     if (!ladev)
    646         return -ENOMEM;
    647 
    648     ladev->device.common.tag = HARDWARE_DEVICE_TAG;
    649     ladev->device.common.version = AUDIO_DEVICE_API_VERSION_2_0;
    650     ladev->device.common.module = const_cast<hw_module_t*>(module);
    651     ladev->device.common.close = legacy_adev_close;
    652 
    653     ladev->device.init_check = adev_init_check;
    654     ladev->device.set_voice_volume = adev_set_voice_volume;
    655     ladev->device.set_master_volume = adev_set_master_volume;
    656     ladev->device.get_master_volume = adev_get_master_volume;
    657     ladev->device.set_mode = adev_set_mode;
    658     ladev->device.set_mic_mute = adev_set_mic_mute;
    659     ladev->device.get_mic_mute = adev_get_mic_mute;
    660     ladev->device.set_parameters = adev_set_parameters;
    661     ladev->device.get_parameters = adev_get_parameters;
    662     ladev->device.get_input_buffer_size = adev_get_input_buffer_size;
    663     ladev->device.open_output_stream = adev_open_output_stream;
    664     ladev->device.close_output_stream = adev_close_output_stream;
    665     ladev->device.open_input_stream = adev_open_input_stream;
    666     ladev->device.close_input_stream = adev_close_input_stream;
    667     ladev->device.dump = adev_dump;
    668 
    669     ladev->hwif = createAudioHardware();
    670     if (!ladev->hwif) {
    671         ret = -EIO;
    672         goto err_create_audio_hw;
    673     }
    674 
    675     *device = &ladev->device.common;
    676 
    677     return 0;
    678 
    679 err_create_audio_hw:
    680     free(ladev);
    681     return ret;
    682 }
    683 
    684 static struct hw_module_methods_t legacy_audio_module_methods = {
    685         open: legacy_adev_open
    686 };
    687 
    688 struct legacy_audio_module HAL_MODULE_INFO_SYM = {
    689     module: {
    690         common: {
    691             tag: HARDWARE_MODULE_TAG,
    692             module_api_version: AUDIO_MODULE_API_VERSION_0_1,
    693             hal_api_version: HARDWARE_HAL_API_VERSION,
    694             id: AUDIO_HARDWARE_MODULE_ID,
    695             name: "LEGACY Audio HW HAL",
    696             author: "The Android Open Source Project",
    697             methods: &legacy_audio_module_methods,
    698             dso : NULL,
    699             reserved : {0},
    700         },
    701     },
    702 };
    703 
    704 }; // extern "C"
    705 
    706 }; // namespace android_audio_legacy
    707