audio/audio_hw_hal.cpp - platform/hardware/libhardware_legacy - Gitiles

 /*
  * Copyright (C) 2011 The Android Open Source Project
  *
  * 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 "legacy_audio_hw_hal"
 //#define LOG_NDEBUG 0

 #include <stdint.h>

 #include <hardware/hardware.h>
 #include <system/audio.h>
 #include <hardware/audio.h>

 #include <hardware_legacy/AudioHardwareInterface.h>
 #include <hardware_legacy/AudioSystemLegacy.h>

 namespace android_audio_legacy {

 extern "C" {

 struct legacy_audio_module {
     struct audio_module module;
 };

 struct legacy_audio_device {
     struct audio_hw_device device;

     struct AudioHardwareInterface *hwif;
 };

 struct legacy_stream_out {
     struct audio_stream_out stream;

     AudioStreamOut *legacy_out;
 };

 struct legacy_stream_in {
     struct audio_stream_in stream;

     AudioStreamIn *legacy_in;
 };

 /** audio_stream_out implementation **/
 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     return out->legacy_out->sampleRate();
 }

 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
 {
     struct legacy_stream_out *out =
         reinterpret_cast<struct legacy_stream_out *>(stream);

     LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
     /* TODO: implement this */
     return 0;
 }

 static size_t out_get_buffer_size(const struct audio_stream *stream)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     return out->legacy_out->bufferSize();
 }

 static uint32_t out_get_channels(const struct audio_stream *stream)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     return out->legacy_out->channels();
 }

 static int out_get_format(const struct audio_stream *stream)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     return out->legacy_out->format();
 }

 static int out_set_format(struct audio_stream *stream, int format)
 {
     struct legacy_stream_out *out =
         reinterpret_cast<struct legacy_stream_out *>(stream);
     LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
     /* TODO: implement me */
     return 0;
 }

 static int out_standby(struct audio_stream *stream)
 {
     struct legacy_stream_out *out =
         reinterpret_cast<struct legacy_stream_out *>(stream);
     return out->legacy_out->standby();
 }

 static int out_dump(const struct audio_stream *stream, int fd)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     Vector<String16> args;
     return out->legacy_out->dump(fd, args);
 }

 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
 {
     struct legacy_stream_out *out =
         reinterpret_cast<struct legacy_stream_out *>(stream);
     return out->legacy_out->setParameters(String8(kvpairs));
 }

 static char * out_get_parameters(const struct audio_stream *stream, const char *keys)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     String8 s8;
     s8 = out->legacy_out->getParameters(String8(keys));
     return strdup(s8.string());
 }

 static uint32_t out_get_latency(const struct audio_stream_out *stream)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     return out->legacy_out->latency();
 }

 static int out_set_volume(struct audio_stream_out *stream, float left,
                           float right)
 {
     struct legacy_stream_out *out =
         reinterpret_cast<struct legacy_stream_out *>(stream);
     return out->legacy_out->setVolume(left, right);
 }

 static ssize_t out_write(struct audio_stream_out *stream, const void* buffer,
                          size_t bytes)
 {
     struct legacy_stream_out *out =
         reinterpret_cast<struct legacy_stream_out *>(stream);
     return out->legacy_out->write(buffer, bytes);
 }

 static int out_get_render_position(const struct audio_stream_out *stream,
                                    uint32_t *dsp_frames)
 {
     const struct legacy_stream_out *out =
         reinterpret_cast<const struct legacy_stream_out *>(stream);
     return out->legacy_out->getRenderPosition(dsp_frames);
 }

 static int out_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
 {
     return 0;
 }

 static int out_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
 {
     return 0;
 }

 /** audio_stream_in implementation **/
 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     return in->legacy_in->sampleRate();
 }

 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
 {
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);

     LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
     /* TODO: implement this */
     return 0;
 }

 static size_t in_get_buffer_size(const struct audio_stream *stream)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     return in->legacy_in->bufferSize();
 }

 static uint32_t in_get_channels(const struct audio_stream *stream)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     return in->legacy_in->channels();
 }

 static int in_get_format(const struct audio_stream *stream)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     return in->legacy_in->format();
 }

 static int in_set_format(struct audio_stream *stream, int format)
 {
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);
     LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
     /* TODO: implement me */
     return 0;
 }

 static int in_standby(struct audio_stream *stream)
 {
     struct legacy_stream_in *in = reinterpret_cast<struct legacy_stream_in *>(stream);
     return in->legacy_in->standby();
 }

 static int in_dump(const struct audio_stream *stream, int fd)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     Vector<String16> args;
     return in->legacy_in->dump(fd, args);
 }

 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
 {
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);
     return in->legacy_in->setParameters(String8(kvpairs));
 }

 static char * in_get_parameters(const struct audio_stream *stream,
                                 const char *keys)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     String8 s8;
     s8 = in->legacy_in->getParameters(String8(keys));
     return strdup(s8.string());
 }

 static int in_set_gain(struct audio_stream_in *stream, float gain)
 {
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);
     return in->legacy_in->setGain(gain);
 }

 static ssize_t in_read(struct audio_stream_in *stream, void* buffer,
                        size_t bytes)
 {
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);
     return in->legacy_in->read(buffer, bytes);
 }

 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
 {
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);
     return in->legacy_in->getInputFramesLost();
 }

 static int in_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     return in->legacy_in->addAudioEffect(effect);
 }

 static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
 {
     const struct legacy_stream_in *in =
         reinterpret_cast<const struct legacy_stream_in *>(stream);
     return in->legacy_in->removeAudioEffect(effect);
 }

 /** audio_hw_device implementation **/
 static inline struct legacy_audio_device * to_ladev(struct audio_hw_device *dev)
 {
     return reinterpret_cast<struct legacy_audio_device *>(dev);
 }

 static inline const struct legacy_audio_device * to_cladev(const struct audio_hw_device *dev)
 {
     return reinterpret_cast<const struct legacy_audio_device *>(dev);
 }

 static uint32_t adev_get_supported_devices(const struct audio_hw_device *dev)
 {
     /* XXX: The old AudioHardwareInterface interface is not smart enough to
      * tell us this, so we'll lie and basically tell AF that we support the
      * below input/output devices and cross our fingers. To do things properly,
      * audio hardware interfaces that need advanced features (like this) should
      * convert to the new HAL interface and not use this wrapper. */

     return (/* OUT */
             AUDIO_DEVICE_OUT_EARPIECE |
             AUDIO_DEVICE_OUT_SPEAKER |
             AUDIO_DEVICE_OUT_WIRED_HEADSET |
             AUDIO_DEVICE_OUT_WIRED_HEADPHONE |
             AUDIO_DEVICE_OUT_AUX_DIGITAL |
             AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET |
             AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET |
             AUDIO_DEVICE_OUT_ALL_SCO |
             AUDIO_DEVICE_OUT_DEFAULT |
             /* IN */
             AUDIO_DEVICE_IN_COMMUNICATION |
             AUDIO_DEVICE_IN_AMBIENT |
             AUDIO_DEVICE_IN_BUILTIN_MIC |
             AUDIO_DEVICE_IN_WIRED_HEADSET |
             AUDIO_DEVICE_IN_AUX_DIGITAL |
             AUDIO_DEVICE_IN_BACK_MIC |
             AUDIO_DEVICE_IN_ALL_SCO |
             AUDIO_DEVICE_IN_DEFAULT);
 }

 static int adev_init_check(const struct audio_hw_device *dev)
 {
     const struct legacy_audio_device *ladev = to_cladev(dev);

     return ladev->hwif->initCheck();
 }

 static int adev_set_voice_volume(struct audio_hw_device *dev, float volume)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     return ladev->hwif->setVoiceVolume(volume);
 }

 static int adev_set_master_volume(struct audio_hw_device *dev, float volume)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     return ladev->hwif->setMasterVolume(volume);
 }

 static int adev_set_mode(struct audio_hw_device *dev, int mode)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     return ladev->hwif->setMode(mode);
 }

 static int adev_set_mic_mute(struct audio_hw_device *dev, bool state)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     return ladev->hwif->setMicMute(state);
 }

 static int adev_get_mic_mute(const struct audio_hw_device *dev, bool *state)
 {
     const struct legacy_audio_device *ladev = to_cladev(dev);
     return ladev->hwif->getMicMute(state);
 }

 static int adev_set_parameters(struct audio_hw_device *dev, const char *kvpairs)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     return ladev->hwif->setParameters(String8(kvpairs));
 }

 static char * adev_get_parameters(const struct audio_hw_device *dev,
                                   const char *keys)
 {
     const struct legacy_audio_device *ladev = to_cladev(dev);
     String8 s8;

     s8 = ladev->hwif->getParameters(String8(keys));
     return strdup(s8.string());
 }

 static size_t adev_get_input_buffer_size(const struct audio_hw_device *dev,
                                          uint32_t sample_rate, int format,
                                          int channel_count)
 {
     const struct legacy_audio_device *ladev = to_cladev(dev);
     return ladev->hwif->getInputBufferSize(sample_rate, format, channel_count);
 }

 static int adev_open_output_stream(struct audio_hw_device *dev,
                                    uint32_t devices,
                                    int *format,
                                    uint32_t *channels,
                                    uint32_t *sample_rate,
                                    struct audio_stream_out **stream_out)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     status_t status;
     struct legacy_stream_out *out;
     int ret;

     out = (struct legacy_stream_out *)calloc(1, sizeof(*out));
     if (!out)
         return -ENOMEM;

     out->legacy_out = ladev->hwif->openOutputStream(devices, format, channels,
                                                     sample_rate, &status);
     if (!out->legacy_out) {
         ret = status;
         goto err_open;
     }

     out->stream.common.get_sample_rate = out_get_sample_rate;
     out->stream.common.set_sample_rate = out_set_sample_rate;
     out->stream.common.get_buffer_size = out_get_buffer_size;
     out->stream.common.get_channels = out_get_channels;
     out->stream.common.get_format = out_get_format;
     out->stream.common.set_format = out_set_format;
     out->stream.common.standby = out_standby;
     out->stream.common.dump = out_dump;
     out->stream.common.set_parameters = out_set_parameters;
     out->stream.common.get_parameters = out_get_parameters;
     out->stream.common.add_audio_effect = out_add_audio_effect;
     out->stream.common.remove_audio_effect = out_remove_audio_effect;
     out->stream.get_latency = out_get_latency;
     out->stream.set_volume = out_set_volume;
     out->stream.write = out_write;
     out->stream.get_render_position = out_get_render_position;

     *stream_out = &out->stream;
     return 0;

 err_open:
     free(out);
     *stream_out = NULL;
     return ret;
 }

 static void adev_close_output_stream(struct audio_hw_device *dev,
                                      struct audio_stream_out* stream)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     struct legacy_stream_out *out = reinterpret_cast<struct legacy_stream_out *>(stream);

     ladev->hwif->closeOutputStream(out->legacy_out);
     free(out);
 }

 /** This method creates and opens the audio hardware input stream */
 static int adev_open_input_stream(struct audio_hw_device *dev,
                                   uint32_t devices, int *format,
                                   uint32_t *channels, uint32_t *sample_rate,
                                   audio_in_acoustics_t acoustics,
                                   struct audio_stream_in **stream_in)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     status_t status;
     struct legacy_stream_in *in;
     int ret;

     in = (struct legacy_stream_in *)calloc(1, sizeof(*in));
     if (!in)
         return -ENOMEM;

     in->legacy_in = ladev->hwif->openInputStream(devices, format, channels,
                                     sample_rate, &status,
                                     (AudioSystem::audio_in_acoustics)acoustics);
     if (!in->legacy_in) {
         ret = status;
         goto err_open;
     }

     in->stream.common.get_sample_rate = in_get_sample_rate;
     in->stream.common.set_sample_rate = in_set_sample_rate;
     in->stream.common.get_buffer_size = in_get_buffer_size;
     in->stream.common.get_channels = in_get_channels;
     in->stream.common.get_format = in_get_format;
     in->stream.common.set_format = in_set_format;
     in->stream.common.standby = in_standby;
     in->stream.common.dump = in_dump;
     in->stream.common.set_parameters = in_set_parameters;
     in->stream.common.get_parameters = in_get_parameters;
     in->stream.common.add_audio_effect = in_add_audio_effect;
     in->stream.common.remove_audio_effect = in_remove_audio_effect;
     in->stream.set_gain = in_set_gain;
     in->stream.read = in_read;
     in->stream.get_input_frames_lost = in_get_input_frames_lost;

     *stream_in = &in->stream;
     return 0;

 err_open:
     free(in);
     *stream_in = NULL;
     return ret;
 }

 static void adev_close_input_stream(struct audio_hw_device *dev,
                                struct audio_stream_in *stream)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
     struct legacy_stream_in *in =
         reinterpret_cast<struct legacy_stream_in *>(stream);

     ladev->hwif->closeInputStream(in->legacy_in);
     free(in);
 }

 static int adev_dump(const struct audio_hw_device *dev, int fd)
 {
     const struct legacy_audio_device *ladev = to_cladev(dev);
     Vector<String16> args;

     return ladev->hwif->dumpState(fd, args);
 }

 static int legacy_adev_close(hw_device_t* device)
 {
     struct audio_hw_device *hwdev =
                         reinterpret_cast<struct audio_hw_device *>(device);
     struct legacy_audio_device *ladev = to_ladev(hwdev);

     if (!ladev)
         return 0;

     if (ladev->hwif)
         delete ladev->hwif;

     free(ladev);
     return 0;
 }

 static int legacy_adev_open(const hw_module_t* module, const char* name,
                             hw_device_t** device)
 {
     struct legacy_audio_device *ladev;
     int ret;

     if (strcmp(name, AUDIO_HARDWARE_INTERFACE) != 0)
         return -EINVAL;

     ladev = (struct legacy_audio_device *)calloc(1, sizeof(*ladev));
     if (!ladev)
         return -ENOMEM;

     ladev->device.common.tag = HARDWARE_DEVICE_TAG;
     ladev->device.common.version = 0;
     ladev->device.common.module = const_cast<hw_module_t*>(module);
     ladev->device.common.close = legacy_adev_close;

     ladev->device.get_supported_devices = adev_get_supported_devices;
     ladev->device.init_check = adev_init_check;
     ladev->device.set_voice_volume = adev_set_voice_volume;
     ladev->device.set_master_volume = adev_set_master_volume;
     ladev->device.set_mode = adev_set_mode;
     ladev->device.set_mic_mute = adev_set_mic_mute;
     ladev->device.get_mic_mute = adev_get_mic_mute;
     ladev->device.set_parameters = adev_set_parameters;
     ladev->device.get_parameters = adev_get_parameters;
     ladev->device.get_input_buffer_size = adev_get_input_buffer_size;
     ladev->device.open_output_stream = adev_open_output_stream;
     ladev->device.close_output_stream = adev_close_output_stream;
     ladev->device.open_input_stream = adev_open_input_stream;
     ladev->device.close_input_stream = adev_close_input_stream;
     ladev->device.dump = adev_dump;

     ladev->hwif = createAudioHardware();
     if (!ladev->hwif) {
         ret = -EIO;
         goto err_create_audio_hw;
     }

     *device = &ladev->device.common;

     return 0;

 err_create_audio_hw:
     free(ladev);
     return ret;
 }

 static struct hw_module_methods_t legacy_audio_module_methods = {
         open: legacy_adev_open
 };

 struct legacy_audio_module HAL_MODULE_INFO_SYM = {
     module: {
         common: {
             tag: HARDWARE_MODULE_TAG,
             version_major: 1,
             version_minor: 0,
             id: AUDIO_HARDWARE_MODULE_ID,
             name: "LEGACY Audio HW HAL",
             author: "The Android Open Source Project",
             methods: &legacy_audio_module_methods,
             dso : NULL,
             reserved : {0},
         },
     },
 };

 }; // extern "C"

 }; // namespace android_audio_legacy
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* 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 "legacy_audio_hw_hal"
	//#define LOG_NDEBUG 0

	#include <stdint.h>

	#include <hardware/hardware.h>
	#include <system/audio.h>
	#include <hardware/audio.h>

	#include <hardware_legacy/AudioHardwareInterface.h>
	#include <hardware_legacy/AudioSystemLegacy.h>

	namespace android_audio_legacy {

	extern "C" {

	struct legacy_audio_module {
	struct audio_module module;
	};

	struct legacy_audio_device {
	struct audio_hw_device device;

	struct AudioHardwareInterface *hwif;
	};

	struct legacy_stream_out {
	struct audio_stream_out stream;

	AudioStreamOut *legacy_out;
	};

	struct legacy_stream_in {
	struct audio_stream_in stream;

	AudioStreamIn *legacy_in;
	};

	/ audio_stream_out implementation /
	static uint32_t out_get_sample_rate(const struct audio_stream *stream)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	return out->legacy_out->sampleRate();
	}

	static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
	{
	struct legacy_stream_out *out =
	reinterpret_cast<struct legacy_stream_out *>(stream);

	LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
	/* TODO: implement this */
	return 0;
	}

	static size_t out_get_buffer_size(const struct audio_stream *stream)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	return out->legacy_out->bufferSize();
	}

	static uint32_t out_get_channels(const struct audio_stream *stream)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	return out->legacy_out->channels();
	}

	static int out_get_format(const struct audio_stream *stream)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	return out->legacy_out->format();
	}

	static int out_set_format(struct audio_stream *stream, int format)
	{
	struct legacy_stream_out *out =
	reinterpret_cast<struct legacy_stream_out *>(stream);
	LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
	/* TODO: implement me */
	return 0;
	}

	static int out_standby(struct audio_stream *stream)
	{
	struct legacy_stream_out *out =
	reinterpret_cast<struct legacy_stream_out *>(stream);
	return out->legacy_out->standby();
	}

	static int out_dump(const struct audio_stream *stream, int fd)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	Vector<String16> args;
	return out->legacy_out->dump(fd, args);
	}

	static int out_set_parameters(struct audio_stream stream, const char kvpairs)
	{
	struct legacy_stream_out *out =
	reinterpret_cast<struct legacy_stream_out *>(stream);
	return out->legacy_out->setParameters(String8(kvpairs));
	}

	static char * out_get_parameters(const struct audio_stream stream, const char keys)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	String8 s8;
	s8 = out->legacy_out->getParameters(String8(keys));
	return strdup(s8.string());
	}

	static uint32_t out_get_latency(const struct audio_stream_out *stream)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	return out->legacy_out->latency();
	}

	static int out_set_volume(struct audio_stream_out *stream, float left,
	float right)
	{
	struct legacy_stream_out *out =
	reinterpret_cast<struct legacy_stream_out *>(stream);
	return out->legacy_out->setVolume(left, right);
	}

	static ssize_t out_write(struct audio_stream_out stream, const void buffer,
	size_t bytes)
	{
	struct legacy_stream_out *out =
	reinterpret_cast<struct legacy_stream_out *>(stream);
	return out->legacy_out->write(buffer, bytes);
	}

	static int out_get_render_position(const struct audio_stream_out *stream,
	uint32_t *dsp_frames)
	{
	const struct legacy_stream_out *out =
	reinterpret_cast<const struct legacy_stream_out *>(stream);
	return out->legacy_out->getRenderPosition(dsp_frames);
	}

	static int out_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
	{
	return 0;
	}

	static int out_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
	{
	return 0;
	}

	/ audio_stream_in implementation /
	static uint32_t in_get_sample_rate(const struct audio_stream *stream)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	return in->legacy_in->sampleRate();
	}

	static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
	{
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);

	LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
	/* TODO: implement this */
	return 0;
	}

	static size_t in_get_buffer_size(const struct audio_stream *stream)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	return in->legacy_in->bufferSize();
	}

	static uint32_t in_get_channels(const struct audio_stream *stream)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	return in->legacy_in->channels();
	}

	static int in_get_format(const struct audio_stream *stream)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	return in->legacy_in->format();
	}

	static int in_set_format(struct audio_stream *stream, int format)
	{
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);
	LOGE("(%s:%d) %s: Implement me!", __FILE__, __LINE__, __func__);
	/* TODO: implement me */
	return 0;
	}

	static int in_standby(struct audio_stream *stream)
	{
	struct legacy_stream_in in = reinterpret_cast<struct legacy_stream_in >(stream);
	return in->legacy_in->standby();
	}

	static int in_dump(const struct audio_stream *stream, int fd)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	Vector<String16> args;
	return in->legacy_in->dump(fd, args);
	}

	static int in_set_parameters(struct audio_stream stream, const char kvpairs)
	{
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);
	return in->legacy_in->setParameters(String8(kvpairs));
	}

	static char * in_get_parameters(const struct audio_stream *stream,
	const char *keys)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	String8 s8;
	s8 = in->legacy_in->getParameters(String8(keys));
	return strdup(s8.string());
	}

	static int in_set_gain(struct audio_stream_in *stream, float gain)
	{
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);
	return in->legacy_in->setGain(gain);
	}

	static ssize_t in_read(struct audio_stream_in stream, void buffer,
	size_t bytes)
	{
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);
	return in->legacy_in->read(buffer, bytes);
	}

	static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
	{
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);
	return in->legacy_in->getInputFramesLost();
	}

	static int in_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	return in->legacy_in->addAudioEffect(effect);
	}

	static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
	{
	const struct legacy_stream_in *in =
	reinterpret_cast<const struct legacy_stream_in *>(stream);
	return in->legacy_in->removeAudioEffect(effect);
	}

	/ audio_hw_device implementation /
	static inline struct legacy_audio_device * to_ladev(struct audio_hw_device *dev)
	{
	return reinterpret_cast<struct legacy_audio_device *>(dev);
	}

	static inline const struct legacy_audio_device * to_cladev(const struct audio_hw_device *dev)
	{
	return reinterpret_cast<const struct legacy_audio_device *>(dev);
	}

	static uint32_t adev_get_supported_devices(const struct audio_hw_device *dev)
	{
	/* XXX: The old AudioHardwareInterface interface is not smart enough to
	* tell us this, so we'll lie and basically tell AF that we support the
	* below input/output devices and cross our fingers. To do things properly,
	* audio hardware interfaces that need advanced features (like this) should
	* convert to the new HAL interface and not use this wrapper. */

	return (/* OUT */
	AUDIO_DEVICE_OUT_EARPIECE \|
	AUDIO_DEVICE_OUT_SPEAKER \|
	AUDIO_DEVICE_OUT_WIRED_HEADSET \|
	AUDIO_DEVICE_OUT_WIRED_HEADPHONE \|
	AUDIO_DEVICE_OUT_AUX_DIGITAL \|
	AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET \|
	AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET \|
	AUDIO_DEVICE_OUT_ALL_SCO \|
	AUDIO_DEVICE_OUT_DEFAULT \|
	/* IN */
	AUDIO_DEVICE_IN_COMMUNICATION \|
	AUDIO_DEVICE_IN_AMBIENT \|
	AUDIO_DEVICE_IN_BUILTIN_MIC \|
	AUDIO_DEVICE_IN_WIRED_HEADSET \|
	AUDIO_DEVICE_IN_AUX_DIGITAL \|
	AUDIO_DEVICE_IN_BACK_MIC \|
	AUDIO_DEVICE_IN_ALL_SCO \|
	AUDIO_DEVICE_IN_DEFAULT);
	}

	static int adev_init_check(const struct audio_hw_device *dev)
	{
	const struct legacy_audio_device *ladev = to_cladev(dev);

	return ladev->hwif->initCheck();
	}

	static int adev_set_voice_volume(struct audio_hw_device *dev, float volume)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	return ladev->hwif->setVoiceVolume(volume);
	}

	static int adev_set_master_volume(struct audio_hw_device *dev, float volume)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	return ladev->hwif->setMasterVolume(volume);
	}

	static int adev_set_mode(struct audio_hw_device *dev, int mode)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	return ladev->hwif->setMode(mode);
	}

	static int adev_set_mic_mute(struct audio_hw_device *dev, bool state)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	return ladev->hwif->setMicMute(state);
	}

	static int adev_get_mic_mute(const struct audio_hw_device dev, bool state)
	{
	const struct legacy_audio_device *ladev = to_cladev(dev);
	return ladev->hwif->getMicMute(state);
	}

	static int adev_set_parameters(struct audio_hw_device dev, const char kvpairs)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	return ladev->hwif->setParameters(String8(kvpairs));
	}

	static char * adev_get_parameters(const struct audio_hw_device *dev,
	const char *keys)
	{
	const struct legacy_audio_device *ladev = to_cladev(dev);
	String8 s8;

	s8 = ladev->hwif->getParameters(String8(keys));
	return strdup(s8.string());
	}

	static size_t adev_get_input_buffer_size(const struct audio_hw_device *dev,
	uint32_t sample_rate, int format,
	int channel_count)
	{
	const struct legacy_audio_device *ladev = to_cladev(dev);
	return ladev->hwif->getInputBufferSize(sample_rate, format, channel_count);
	}

	static int adev_open_output_stream(struct audio_hw_device *dev,
	uint32_t devices,
	int *format,
	uint32_t *channels,
	uint32_t *sample_rate,
	struct audio_stream_out **stream_out)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	status_t status;
	struct legacy_stream_out *out;
	int ret;

	out = (struct legacy_stream_out )calloc(1, sizeof(out));
	if (!out)
	return -ENOMEM;

	out->legacy_out = ladev->hwif->openOutputStream(devices, format, channels,
	sample_rate, &status);
	if (!out->legacy_out) {
	ret = status;
	goto err_open;
	}

	out->stream.common.get_sample_rate = out_get_sample_rate;
	out->stream.common.set_sample_rate = out_set_sample_rate;
	out->stream.common.get_buffer_size = out_get_buffer_size;
	out->stream.common.get_channels = out_get_channels;
	out->stream.common.get_format = out_get_format;
	out->stream.common.set_format = out_set_format;
	out->stream.common.standby = out_standby;
	out->stream.common.dump = out_dump;
	out->stream.common.set_parameters = out_set_parameters;
	out->stream.common.get_parameters = out_get_parameters;
	out->stream.common.add_audio_effect = out_add_audio_effect;
	out->stream.common.remove_audio_effect = out_remove_audio_effect;
	out->stream.get_latency = out_get_latency;
	out->stream.set_volume = out_set_volume;
	out->stream.write = out_write;
	out->stream.get_render_position = out_get_render_position;

	*stream_out = &out->stream;
	return 0;

	err_open:
	free(out);
	*stream_out = NULL;
	return ret;
	}

	static void adev_close_output_stream(struct audio_hw_device *dev,
	struct audio_stream_out* stream)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	struct legacy_stream_out out = reinterpret_cast<struct legacy_stream_out >(stream);

	ladev->hwif->closeOutputStream(out->legacy_out);
	free(out);
	}

	/** This method creates and opens the audio hardware input stream */
	static int adev_open_input_stream(struct audio_hw_device *dev,
	uint32_t devices, int *format,
	uint32_t channels, uint32_t sample_rate,
	audio_in_acoustics_t acoustics,
	struct audio_stream_in **stream_in)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	status_t status;
	struct legacy_stream_in *in;
	int ret;

	in = (struct legacy_stream_in )calloc(1, sizeof(in));
	if (!in)
	return -ENOMEM;

	in->legacy_in = ladev->hwif->openInputStream(devices, format, channels,
	sample_rate, &status,
	(AudioSystem::audio_in_acoustics)acoustics);
	if (!in->legacy_in) {
	ret = status;
	goto err_open;
	}

	in->stream.common.get_sample_rate = in_get_sample_rate;
	in->stream.common.set_sample_rate = in_set_sample_rate;
	in->stream.common.get_buffer_size = in_get_buffer_size;
	in->stream.common.get_channels = in_get_channels;
	in->stream.common.get_format = in_get_format;
	in->stream.common.set_format = in_set_format;
	in->stream.common.standby = in_standby;
	in->stream.common.dump = in_dump;
	in->stream.common.set_parameters = in_set_parameters;
	in->stream.common.get_parameters = in_get_parameters;
	in->stream.common.add_audio_effect = in_add_audio_effect;
	in->stream.common.remove_audio_effect = in_remove_audio_effect;
	in->stream.set_gain = in_set_gain;
	in->stream.read = in_read;
	in->stream.get_input_frames_lost = in_get_input_frames_lost;

	*stream_in = &in->stream;
	return 0;

	err_open:
	free(in);
	*stream_in = NULL;
	return ret;
	}

	static void adev_close_input_stream(struct audio_hw_device *dev,
	struct audio_stream_in *stream)
	{
	struct legacy_audio_device *ladev = to_ladev(dev);
	struct legacy_stream_in *in =
	reinterpret_cast<struct legacy_stream_in *>(stream);

	ladev->hwif->closeInputStream(in->legacy_in);
	free(in);
	}

	static int adev_dump(const struct audio_hw_device *dev, int fd)
	{
	const struct legacy_audio_device *ladev = to_cladev(dev);
	Vector<String16> args;

	return ladev->hwif->dumpState(fd, args);
	}

	static int legacy_adev_close(hw_device_t* device)
	{
	struct audio_hw_device *hwdev =
	reinterpret_cast<struct audio_hw_device *>(device);
	struct legacy_audio_device *ladev = to_ladev(hwdev);

	if (!ladev)
	return 0;

	if (ladev->hwif)
	delete ladev->hwif;

	free(ladev);
	return 0;
	}

	static int legacy_adev_open(const hw_module_t* module, const char* name,
	hw_device_t** device)
	{
	struct legacy_audio_device *ladev;
	int ret;

	if (strcmp(name, AUDIO_HARDWARE_INTERFACE) != 0)
	return -EINVAL;

	ladev = (struct legacy_audio_device )calloc(1, sizeof(ladev));
	if (!ladev)
	return -ENOMEM;

	ladev->device.common.tag = HARDWARE_DEVICE_TAG;
	ladev->device.common.version = 0;
	ladev->device.common.module = const_cast<hw_module_t*>(module);
	ladev->device.common.close = legacy_adev_close;

	ladev->device.get_supported_devices = adev_get_supported_devices;
	ladev->device.init_check = adev_init_check;
	ladev->device.set_voice_volume = adev_set_voice_volume;
	ladev->device.set_master_volume = adev_set_master_volume;
	ladev->device.set_mode = adev_set_mode;
	ladev->device.set_mic_mute = adev_set_mic_mute;
	ladev->device.get_mic_mute = adev_get_mic_mute;
	ladev->device.set_parameters = adev_set_parameters;
	ladev->device.get_parameters = adev_get_parameters;
	ladev->device.get_input_buffer_size = adev_get_input_buffer_size;
	ladev->device.open_output_stream = adev_open_output_stream;
	ladev->device.close_output_stream = adev_close_output_stream;
	ladev->device.open_input_stream = adev_open_input_stream;
	ladev->device.close_input_stream = adev_close_input_stream;
	ladev->device.dump = adev_dump;

	ladev->hwif = createAudioHardware();
	if (!ladev->hwif) {
	ret = -EIO;
	goto err_create_audio_hw;
	}

	*device = &ladev->device.common;

	return 0;

	err_create_audio_hw:
	free(ladev);
	return ret;
	}

	static struct hw_module_methods_t legacy_audio_module_methods = {
	open: legacy_adev_open
	};

	struct legacy_audio_module HAL_MODULE_INFO_SYM = {
	module: {
	common: {
	tag: HARDWARE_MODULE_TAG,
	version_major: 1,
	version_minor: 0,
	id: AUDIO_HARDWARE_MODULE_ID,
	name: "LEGACY Audio HW HAL",
	author: "The Android Open Source Project",
	methods: &legacy_audio_module_methods,
	dso : NULL,
	reserved : {0},
	},
	},
	};

	}; // extern "C"

	}; // namespace android_audio_legacy