M7350v1_en_gpl

hardware/libhardware/modules/audio/Android.mk

@@ -0,0 +1,43 @@
+# 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.
+
+LOCAL_PATH := $(call my-dir)
+
+# The default audio HAL module, which is a stub, that is loaded if no other
+# device specific modules are present. The exact load order can be seen in
+# libhardware/hardware.c
+#
+# The format of the name is audio.<type>.<hardware/etc>.so where the only
+# required type is 'primary'. Other possibilites are 'a2dp', 'usb', etc.
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := audio.primary.default
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_SRC_FILES := audio_hw.c
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)
+
+# The stub audio policy HAL module that can be used as a skeleton for
+# new implementations.
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := audio_policy.stub
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_SRC_FILES := audio_policy.c
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)

hardware/libhardware/modules/audio/audio_hw.c

@@ -0,0 +1,450 @@
+/*
+ * 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 "audio_hw_default"
+//#define LOG_NDEBUG 0
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <sys/time.h>
+
+#include <cutils/log.h>
+
+#include <hardware/hardware.h>
+#include <system/audio.h>
+#include <hardware/audio.h>
+
+struct stub_audio_device {
+    struct audio_hw_device device;
+};
+
+struct stub_stream_out {
+    struct audio_stream_out stream;
+};
+
+struct stub_stream_in {
+    struct audio_stream_in stream;
+};
+
+static uint32_t out_get_sample_rate(const struct audio_stream *stream)
+{
+    return 44100;
+}
+
+static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
+{
+    return 0;
+}
+
+static size_t out_get_buffer_size(const struct audio_stream *stream)
+{
+    return 4096;
+}
+
+static uint32_t out_get_channels(const struct audio_stream *stream)
+{
+    return AUDIO_CHANNEL_OUT_STEREO;
+}
+
+static audio_format_t out_get_format(const struct audio_stream *stream)
+{
+    return AUDIO_FORMAT_PCM_16_BIT;
+}
+
+static int out_set_format(struct audio_stream *stream, audio_format_t format)
+{
+    return 0;
+}
+
+static int out_standby(struct audio_stream *stream)
+{
+    return 0;
+}
+
+static int out_dump(const struct audio_stream *stream, int fd)
+{
+    return 0;
+}
+
+static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
+{
+    return 0;
+}
+
+static char * out_get_parameters(const struct audio_stream *stream, const char *keys)
+{
+    return strdup("");
+}
+
+static uint32_t out_get_latency(const struct audio_stream_out *stream)
+{
+    return 0;
+}
+
+static int out_set_volume(struct audio_stream_out *stream, float left,
+                          float right)
+{
+    return 0;
+}
+
+static ssize_t out_write(struct audio_stream_out *stream, const void* buffer,
+                         size_t bytes)
+{
+    /* XXX: fake timing for audio output */
+    usleep(bytes * 1000000 / audio_stream_frame_size(&stream->common) /
+           out_get_sample_rate(&stream->common));
+    return bytes;
+}
+
+static int out_get_render_position(const struct audio_stream_out *stream,
+                                   uint32_t *dsp_frames)
+{
+    return -EINVAL;
+}
+
+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;
+}
+
+static int out_get_next_write_timestamp(const struct audio_stream_out *stream,
+                                        int64_t *timestamp)
+{
+    return -EINVAL;
+}
+
+/** audio_stream_in implementation **/
+static uint32_t in_get_sample_rate(const struct audio_stream *stream)
+{
+    return 8000;
+}
+
+static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
+{
+    return 0;
+}
+
+static size_t in_get_buffer_size(const struct audio_stream *stream)
+{
+    return 320;
+}
+
+static uint32_t in_get_channels(const struct audio_stream *stream)
+{
+    return AUDIO_CHANNEL_IN_MONO;
+}
+
+static audio_format_t in_get_format(const struct audio_stream *stream)
+{
+    return AUDIO_FORMAT_PCM_16_BIT;
+}
+
+static int in_set_format(struct audio_stream *stream, audio_format_t format)
+{
+    return 0;
+}
+
+static int in_standby(struct audio_stream *stream)
+{
+    return 0;
+}
+
+static int in_dump(const struct audio_stream *stream, int fd)
+{
+    return 0;
+}
+
+static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
+{
+    return 0;
+}
+
+static char * in_get_parameters(const struct audio_stream *stream,
+                                const char *keys)
+{
+    return strdup("");
+}
+
+static int in_set_gain(struct audio_stream_in *stream, float gain)
+{
+    return 0;
+}
+
+static ssize_t in_read(struct audio_stream_in *stream, void* buffer,
+                       size_t bytes)
+{
+    /* XXX: fake timing for audio input */
+    usleep(bytes * 1000000 / audio_stream_frame_size(&stream->common) /
+           in_get_sample_rate(&stream->common));
+    return bytes;
+}
+
+static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
+{
+    return 0;
+}
+
+static int in_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
+{
+    return 0;
+}
+
+static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
+{
+    return 0;
+}
+
+static int adev_open_output_stream(struct audio_hw_device *dev,
+                                   audio_io_handle_t handle,
+                                   audio_devices_t devices,
+                                   audio_output_flags_t flags,
+                                   struct audio_config *config,
+                                   struct audio_stream_out **stream_out)
+{
+    struct stub_audio_device *ladev = (struct stub_audio_device *)dev;
+    struct stub_stream_out *out;
+    int ret;
+
+    out = (struct stub_stream_out *)calloc(1, sizeof(struct stub_stream_out));
+    if (!out)
+        return -ENOMEM;
+
+    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;
+    out->stream.get_next_write_timestamp = out_get_next_write_timestamp;
+
+    *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)
+{
+    free(stream);
+}
+
+static int adev_set_parameters(struct audio_hw_device *dev, const char *kvpairs)
+{
+    return -ENOSYS;
+}
+
+static char * adev_get_parameters(const struct audio_hw_device *dev,
+                                  const char *keys)
+{
+    return NULL;
+}
+
+static int adev_init_check(const struct audio_hw_device *dev)
+{
+    return 0;
+}
+
+static int adev_set_voice_volume(struct audio_hw_device *dev, float volume)
+{
+    return -ENOSYS;
+}
+
+static int adev_set_master_volume(struct audio_hw_device *dev, float volume)
+{
+    return -ENOSYS;
+}
+
+static int adev_get_master_volume(struct audio_hw_device *dev,
+                                  float *volume)
+{
+    return -ENOSYS;
+}
+
+static int adev_set_mode(struct audio_hw_device *dev, audio_mode_t mode)
+{
+    return 0;
+}
+
+static int adev_set_mic_mute(struct audio_hw_device *dev, bool state)
+{
+    return -ENOSYS;
+}
+
+static int adev_get_mic_mute(const struct audio_hw_device *dev, bool *state)
+{
+    return -ENOSYS;
+}
+
+static size_t adev_get_input_buffer_size(const struct audio_hw_device *dev,
+                                         const struct audio_config *config)
+{
+    return 320;
+}
+
+static int adev_open_input_stream(struct audio_hw_device *dev,
+                                  audio_io_handle_t handle,
+                                  audio_devices_t devices,
+                                  struct audio_config *config,
+                                  struct audio_stream_in **stream_in)
+{
+    struct stub_audio_device *ladev = (struct stub_audio_device *)dev;
+    struct stub_stream_in *in;
+    int ret;
+
+    in = (struct stub_stream_in *)calloc(1, sizeof(struct stub_stream_in));
+    if (!in)
+        return -ENOMEM;
+
+    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 *in)
+{
+    return;
+}
+
+static int adev_dump(const audio_hw_device_t *device, int fd)
+{
+    return 0;
+}
+
+static int adev_close(hw_device_t *device)
+{
+    free(device);
+    return 0;
+}
+
+static uint32_t adev_get_supported_devices(const struct audio_hw_device *dev)
+{
+    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_open(const hw_module_t* module, const char* name,
+                     hw_device_t** device)
+{
+    struct stub_audio_device *adev;
+    int ret;
+
+    if (strcmp(name, AUDIO_HARDWARE_INTERFACE) != 0)
+        return -EINVAL;
+
+    adev = calloc(1, sizeof(struct stub_audio_device));
+    if (!adev)
+        return -ENOMEM;
+
+    adev->device.common.tag = HARDWARE_DEVICE_TAG;
+    adev->device.common.version = AUDIO_DEVICE_API_VERSION_1_0;
+    adev->device.common.module = (struct hw_module_t *) module;
+    adev->device.common.close = adev_close;
+
+    adev->device.get_supported_devices = adev_get_supported_devices;
+    adev->device.init_check = adev_init_check;
+    adev->device.set_voice_volume = adev_set_voice_volume;
+    adev->device.set_master_volume = adev_set_master_volume;
+    adev->device.get_master_volume = adev_get_master_volume;
+    adev->device.set_mode = adev_set_mode;
+    adev->device.set_mic_mute = adev_set_mic_mute;
+    adev->device.get_mic_mute = adev_get_mic_mute;
+    adev->device.set_parameters = adev_set_parameters;
+    adev->device.get_parameters = adev_get_parameters;
+    adev->device.get_input_buffer_size = adev_get_input_buffer_size;
+    adev->device.open_output_stream = adev_open_output_stream;
+    adev->device.close_output_stream = adev_close_output_stream;
+    adev->device.open_input_stream = adev_open_input_stream;
+    adev->device.close_input_stream = adev_close_input_stream;
+    adev->device.dump = adev_dump;
+
+    *device = &adev->device.common;
+
+    return 0;
+}
+
+static struct hw_module_methods_t hal_module_methods = {
+    .open = adev_open,
+};
+
+struct audio_module HAL_MODULE_INFO_SYM = {
+    .common = {
+        .tag = HARDWARE_MODULE_TAG,
+        .module_api_version = AUDIO_MODULE_API_VERSION_0_1,
+        .hal_api_version = HARDWARE_HAL_API_VERSION,
+        .id = AUDIO_HARDWARE_MODULE_ID,
+        .name = "Default audio HW HAL",
+        .author = "The Android Open Source Project",
+        .methods = &hal_module_methods,
+    },
+};

hardware/libhardware/modules/audio/audio_policy.c

@@ -0,0 +1,343 @@
+/*
+ * 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 "audio_policy_default"
+//#define LOG_NDEBUG 0
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <hardware/hardware.h>
+#include <system/audio.h>
+#include <system/audio_policy.h>
+#include <hardware/audio_policy.h>
+
+struct default_ap_module {
+    struct audio_policy_module module;
+};
+
+struct default_ap_device {
+    struct audio_policy_device device;
+};
+
+struct default_audio_policy {
+    struct audio_policy policy;
+
+    struct audio_policy_service_ops *aps_ops;
+    void *service;
+};
+
+static int ap_set_device_connection_state(struct audio_policy *pol,
+                                          audio_devices_t device,
+                                          audio_policy_dev_state_t state,
+                                          const char *device_address)
+{
+    return -ENOSYS;
+}
+
+static audio_policy_dev_state_t ap_get_device_connection_state(
+                                            const struct audio_policy *pol,
+                                            audio_devices_t device,
+                                            const char *device_address)
+{
+    return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
+}
+
+static void ap_set_phone_state(struct audio_policy *pol, audio_mode_t state)
+{
+}
+
+// deprecated, never called
+static void ap_set_ringer_mode(struct audio_policy *pol, uint32_t mode,
+                               uint32_t mask)
+{
+}
+
+static void ap_set_force_use(struct audio_policy *pol,
+                          audio_policy_force_use_t usage,
+                          audio_policy_forced_cfg_t config)
+{
+}
+
+    /* retreive current device category forced for a given usage */
+static audio_policy_forced_cfg_t ap_get_force_use(
+                                               const struct audio_policy *pol,
+                                               audio_policy_force_use_t usage)
+{
+    return AUDIO_POLICY_FORCE_NONE;
+}
+
+/* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
+ * can still be muted. */
+static void ap_set_can_mute_enforced_audible(struct audio_policy *pol,
+                                             bool can_mute)
+{
+}
+
+static int ap_init_check(const struct audio_policy *pol)
+{
+    return 0;
+}
+
+static audio_io_handle_t ap_get_output(struct audio_policy *pol,
+                                       audio_stream_type_t stream,
+                                       uint32_t sampling_rate,
+                                       audio_format_t format,
+                                       uint32_t channels,
+                                       audio_output_flags_t flags)
+{
+    return 0;
+}
+
+static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
+                           audio_stream_type_t stream, int session)
+{
+    return -ENOSYS;
+}
+
+static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
+                          audio_stream_type_t stream, int session)
+{
+    return -ENOSYS;
+}
+
+static void ap_release_output(struct audio_policy *pol,
+                              audio_io_handle_t output)
+{
+}
+
+static audio_io_handle_t ap_get_input(struct audio_policy *pol, audio_source_t inputSource,
+                                      uint32_t sampling_rate,
+                                      audio_format_t format,
+                                      uint32_t channels,
+                                      audio_in_acoustics_t acoustics)
+{
+    return 0;
+}
+
+static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
+{
+    return -ENOSYS;
+}
+
+static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
+{
+    return -ENOSYS;
+}
+
+static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
+{
+}
+
+static void ap_init_stream_volume(struct audio_policy *pol,
+                                  audio_stream_type_t stream, int index_min,
+                                  int index_max)
+{
+}
+
+static int ap_set_stream_volume_index(struct audio_policy *pol,
+                                      audio_stream_type_t stream,
+                                      int index)
+{
+    return -ENOSYS;
+}
+
+static int ap_get_stream_volume_index(const struct audio_policy *pol,
+                                      audio_stream_type_t stream,
+                                      int *index)
+{
+    return -ENOSYS;
+}
+
+static int ap_set_stream_volume_index_for_device(struct audio_policy *pol,
+                                      audio_stream_type_t stream,
+                                      int index,
+                                      audio_devices_t device)
+{
+    return -ENOSYS;
+}
+
+static int ap_get_stream_volume_index_for_device(const struct audio_policy *pol,
+                                      audio_stream_type_t stream,
+                                      int *index,
+                                      audio_devices_t device)
+{
+    return -ENOSYS;
+}
+
+static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
+                                           audio_stream_type_t stream)
+{
+    return 0;
+}
+
+static audio_devices_t ap_get_devices_for_stream(const struct audio_policy *pol,
+                                          audio_stream_type_t stream)
+{
+    return 0;
+}
+
+static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
+                                            struct effect_descriptor_s *desc)
+{
+    return 0;
+}
+
+static int ap_register_effect(struct audio_policy *pol,
+                              struct effect_descriptor_s *desc,
+                              audio_io_handle_t output,
+                              uint32_t strategy,
+                              int session,
+                              int id)
+{
+    return -ENOSYS;
+}
+
+static int ap_unregister_effect(struct audio_policy *pol, int id)
+{
+    return -ENOSYS;
+}
+
+static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
+{
+    return -ENOSYS;
+}
+
+static bool ap_is_stream_active(const struct audio_policy *pol, audio_stream_type_t stream,
+                                uint32_t in_past_ms)
+{
+    return false;
+}
+
+static int ap_dump(const struct audio_policy *pol, int fd)
+{
+    return -ENOSYS;
+}
+
+static int create_default_ap(const struct audio_policy_device *device,
+                             struct audio_policy_service_ops *aps_ops,
+                             void *service,
+                             struct audio_policy **ap)
+{
+    struct default_ap_device *dev;
+    struct default_audio_policy *dap;
+    int ret;
+
+    *ap = NULL;
+
+    if (!service || !aps_ops)
+        return -EINVAL;
+
+    dap = (struct default_audio_policy *)calloc(1, sizeof(*dap));
+    if (!dap)
+        return -ENOMEM;
+
+    dap->policy.set_device_connection_state = ap_set_device_connection_state;
+    dap->policy.get_device_connection_state = ap_get_device_connection_state;
+    dap->policy.set_phone_state = ap_set_phone_state;
+    dap->policy.set_ringer_mode = ap_set_ringer_mode;
+    dap->policy.set_force_use = ap_set_force_use;
+    dap->policy.get_force_use = ap_get_force_use;
+    dap->policy.set_can_mute_enforced_audible =
+        ap_set_can_mute_enforced_audible;
+    dap->policy.init_check = ap_init_check;
+    dap->policy.get_output = ap_get_output;
+    dap->policy.start_output = ap_start_output;
+    dap->policy.stop_output = ap_stop_output;
+    dap->policy.release_output = ap_release_output;
+    dap->policy.get_input = ap_get_input;
+    dap->policy.start_input = ap_start_input;
+    dap->policy.stop_input = ap_stop_input;
+    dap->policy.release_input = ap_release_input;
+    dap->policy.init_stream_volume = ap_init_stream_volume;
+    dap->policy.set_stream_volume_index = ap_set_stream_volume_index;
+    dap->policy.get_stream_volume_index = ap_get_stream_volume_index;
+    dap->policy.set_stream_volume_index_for_device = ap_set_stream_volume_index_for_device;
+    dap->policy.get_stream_volume_index_for_device = ap_get_stream_volume_index_for_device;
+    dap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
+    dap->policy.get_devices_for_stream = ap_get_devices_for_stream;
+    dap->policy.get_output_for_effect = ap_get_output_for_effect;
+    dap->policy.register_effect = ap_register_effect;
+    dap->policy.unregister_effect = ap_unregister_effect;
+    dap->policy.set_effect_enabled = ap_set_effect_enabled;
+    dap->policy.is_stream_active = ap_is_stream_active;
+    dap->policy.dump = ap_dump;
+
+    dap->service = service;
+    dap->aps_ops = aps_ops;
+
+    *ap = &dap->policy;
+    return 0;
+}
+
+static int destroy_default_ap(const struct audio_policy_device *ap_dev,
+                              struct audio_policy *ap)
+{
+    free(ap);
+    return 0;
+}
+
+static int default_ap_dev_close(hw_device_t* device)
+{
+    free(device);
+    return 0;
+}
+
+static int default_ap_dev_open(const hw_module_t* module, const char* name,
+                               hw_device_t** device)
+{
+    struct default_ap_device *dev;
+
+    *device = NULL;
+
+    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
+        return -EINVAL;
+
+    dev = (struct default_ap_device *)calloc(1, sizeof(*dev));
+    if (!dev)
+        return -ENOMEM;
+
+    dev->device.common.tag = HARDWARE_DEVICE_TAG;
+    dev->device.common.version = 0;
+    dev->device.common.module = (hw_module_t *)module;
+    dev->device.common.close = default_ap_dev_close;
+    dev->device.create_audio_policy = create_default_ap;
+    dev->device.destroy_audio_policy = destroy_default_ap;
+
+    *device = &dev->device.common;
+
+    return 0;
+}
+
+static struct hw_module_methods_t default_ap_module_methods = {
+    .open = default_ap_dev_open,
+};
+
+struct default_ap_module HAL_MODULE_INFO_SYM = {
+    .module = {
+        .common = {
+            .tag            = HARDWARE_MODULE_TAG,
+            .version_major  = 1,
+            .version_minor  = 0,
+            .id             = AUDIO_POLICY_HARDWARE_MODULE_ID,
+            .name           = "Default audio policy HAL",
+            .author         = "The Android Open Source Project",
+            .methods        = &default_ap_module_methods,
+        },
+    },
+};