You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
458 lines
19 KiB
458 lines
19 KiB
6 years ago
|
/*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef ANDROID_AUDIO_POLICY_INTERFACE_H
|
||
|
|
#define ANDROID_AUDIO_POLICY_INTERFACE_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#include <hardware/hardware.h>
|
||
|
|
|
||
|
|
#include <system/audio.h>
|
||
|
|
#include <system/audio_policy.h>
|
||
|
|
|
||
|
|
__BEGIN_DECLS
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The id of this module
|
||
|
|
*/
|
||
|
|
#define AUDIO_POLICY_HARDWARE_MODULE_ID "audio_policy"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Name of the audio devices to open
|
||
|
|
*/
|
||
|
|
#define AUDIO_POLICY_INTERFACE "policy"
|
||
|
|
|
||
|
|
/* ---------------------------------------------------------------------------- */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The audio_policy and audio_policy_service_ops structs define the
|
||
|
|
* communication interfaces between the platform specific audio policy manager
|
||
|
|
* and Android generic audio policy manager.
|
||
|
|
* The platform specific audio policy manager must implement methods of the
|
||
|
|
* audio_policy struct.
|
||
|
|
* This implementation makes use of the audio_policy_service_ops to control
|
||
|
|
* the activity and configuration of audio input and output streams.
|
||
|
|
*
|
||
|
|
* The platform specific audio policy manager is in charge of the audio
|
||
|
|
* routing and volume control policies for a given platform.
|
||
|
|
* The main roles of this module are:
|
||
|
|
* - keep track of current system state (removable device connections, phone
|
||
|
|
* state, user requests...).
|
||
|
|
* System state changes and user actions are notified to audio policy
|
||
|
|
* manager with methods of the audio_policy.
|
||
|
|
*
|
||
|
|
* - process get_output() queries received when AudioTrack objects are
|
||
|
|
* created: Those queries return a handler on an output that has been
|
||
|
|
* selected, configured and opened by the audio policy manager and that
|
||
|
|
* must be used by the AudioTrack when registering to the AudioFlinger
|
||
|
|
* with the createTrack() method.
|
||
|
|
* When the AudioTrack object is released, a release_output() query
|
||
|
|
* is received and the audio policy manager can decide to close or
|
||
|
|
* reconfigure the output depending on other streams using this output and
|
||
|
|
* current system state.
|
||
|
|
*
|
||
|
|
* - similarly process get_input() and release_input() queries received from
|
||
|
|
* AudioRecord objects and configure audio inputs.
|
||
|
|
* - process volume control requests: the stream volume is converted from
|
||
|
|
* an index value (received from UI) to a float value applicable to each
|
||
|
|
* output as a function of platform specific settings and current output
|
||
|
|
* route (destination device). It also make sure that streams are not
|
||
|
|
* muted if not allowed (e.g. camera shutter sound in some countries).
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* XXX: this should be defined OUTSIDE of frameworks/base */
|
||
|
|
struct effect_descriptor_s;
|
||
|
|
|
||
|
|
struct audio_policy {
|
||
|
|
/*
|
||
|
|
* configuration functions
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* indicate a change in device connection status */
|
||
|
|
int (*set_device_connection_state)(struct audio_policy *pol,
|
||
|
|
audio_devices_t device,
|
||
|
|
audio_policy_dev_state_t state,
|
||
|
|
const char *device_address);
|
||
|
|
|
||
|
|
/* retrieve a device connection status */
|
||
|
|
audio_policy_dev_state_t (*get_device_connection_state)(
|
||
|
|
const struct audio_policy *pol,
|
||
|
|
audio_devices_t device,
|
||
|
|
const char *device_address);
|
||
|
|
|
||
|
|
/* indicate a change in phone state. Valid phones states are defined
|
||
|
|
* by audio_mode_t */
|
||
|
|
void (*set_phone_state)(struct audio_policy *pol, audio_mode_t state);
|
||
|
|
|
||
|
|
/* deprecated, never called (was "indicate a change in ringer mode") */
|
||
|
|
void (*set_ringer_mode)(struct audio_policy *pol, uint32_t mode,
|
||
|
|
uint32_t mask);
|
||
|
|
|
||
|
|
/* force using a specific device category for the specified usage */
|
||
|
|
void (*set_force_use)(struct audio_policy *pol,
|
||
|
|
audio_policy_force_use_t usage,
|
||
|
|
audio_policy_forced_cfg_t config);
|
||
|
|
|
||
|
|
/* retrieve current device category forced for a given usage */
|
||
|
|
audio_policy_forced_cfg_t (*get_force_use)(const struct audio_policy *pol,
|
||
|
|
audio_policy_force_use_t usage);
|
||
|
|
|
||
|
|
/* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
|
||
|
|
* can still be muted. */
|
||
|
|
void (*set_can_mute_enforced_audible)(struct audio_policy *pol,
|
||
|
|
bool can_mute);
|
||
|
|
|
||
|
|
/* check proper initialization */
|
||
|
|
int (*init_check)(const struct audio_policy *pol);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Audio routing query functions
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* request an output appropriate for playback of the supplied stream type and
|
||
|
|
* parameters */
|
||
|
|
audio_io_handle_t (*get_output)(struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
uint32_t samplingRate,
|
||
|
|
audio_format_t format,
|
||
|
|
audio_channel_mask_t channelMask,
|
||
|
|
audio_output_flags_t flags,
|
||
|
|
const audio_offload_info_t *offloadInfo);
|
||
|
|
|
||
|
|
/* indicates to the audio policy manager that the output starts being used
|
||
|
|
* by corresponding stream. */
|
||
|
|
int (*start_output)(struct audio_policy *pol,
|
||
|
|
audio_io_handle_t output,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int session);
|
||
|
|
|
||
|
|
/* indicates to the audio policy manager that the output stops being used
|
||
|
|
* by corresponding stream. */
|
||
|
|
int (*stop_output)(struct audio_policy *pol,
|
||
|
|
audio_io_handle_t output,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int session);
|
||
|
|
|
||
|
|
/* releases the output. */
|
||
|
|
void (*release_output)(struct audio_policy *pol, audio_io_handle_t output);
|
||
|
|
|
||
|
|
/* request an input appropriate for record from the supplied device with
|
||
|
|
* supplied parameters. */
|
||
|
|
audio_io_handle_t (*get_input)(struct audio_policy *pol, audio_source_t inputSource,
|
||
|
|
uint32_t samplingRate,
|
||
|
|
audio_format_t format,
|
||
|
|
audio_channel_mask_t channelMask,
|
||
|
|
audio_in_acoustics_t acoustics);
|
||
|
|
|
||
|
|
/* indicates to the audio policy manager that the input starts being used */
|
||
|
|
int (*start_input)(struct audio_policy *pol, audio_io_handle_t input);
|
||
|
|
|
||
|
|
/* indicates to the audio policy manager that the input stops being used. */
|
||
|
|
int (*stop_input)(struct audio_policy *pol, audio_io_handle_t input);
|
||
|
|
|
||
|
|
/* releases the input. */
|
||
|
|
void (*release_input)(struct audio_policy *pol, audio_io_handle_t input);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* volume control functions
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* initialises stream volume conversion parameters by specifying volume
|
||
|
|
* index range. The index range for each stream is defined by AudioService. */
|
||
|
|
void (*init_stream_volume)(struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int index_min,
|
||
|
|
int index_max);
|
||
|
|
|
||
|
|
/* sets the new stream volume at a level corresponding to the supplied
|
||
|
|
* index. The index is within the range specified by init_stream_volume() */
|
||
|
|
int (*set_stream_volume_index)(struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int index);
|
||
|
|
|
||
|
|
/* retrieve current volume index for the specified stream */
|
||
|
|
int (*get_stream_volume_index)(const struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int *index);
|
||
|
|
|
||
|
|
/* sets the new stream volume at a level corresponding to the supplied
|
||
|
|
* index for the specified device.
|
||
|
|
* The index is within the range specified by init_stream_volume() */
|
||
|
|
int (*set_stream_volume_index_for_device)(struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int index,
|
||
|
|
audio_devices_t device);
|
||
|
|
|
||
|
|
/* retrieve current volume index for the specified stream for the specified device */
|
||
|
|
int (*get_stream_volume_index_for_device)(const struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
int *index,
|
||
|
|
audio_devices_t device);
|
||
|
|
|
||
|
|
/* return the strategy corresponding to a given stream type */
|
||
|
|
uint32_t (*get_strategy_for_stream)(const struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream);
|
||
|
|
|
||
|
|
/* return the enabled output devices for the given stream type */
|
||
|
|
audio_devices_t (*get_devices_for_stream)(const struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream);
|
||
|
|
|
||
|
|
/* Audio effect management */
|
||
|
|
audio_io_handle_t (*get_output_for_effect)(struct audio_policy *pol,
|
||
|
|
const struct effect_descriptor_s *desc);
|
||
|
|
|
||
|
|
int (*register_effect)(struct audio_policy *pol,
|
||
|
|
const struct effect_descriptor_s *desc,
|
||
|
|
audio_io_handle_t output,
|
||
|
|
uint32_t strategy,
|
||
|
|
int session,
|
||
|
|
int id);
|
||
|
|
|
||
|
|
int (*unregister_effect)(struct audio_policy *pol, int id);
|
||
|
|
|
||
|
|
int (*set_effect_enabled)(struct audio_policy *pol, int id, bool enabled);
|
||
|
|
|
||
|
|
bool (*is_stream_active)(const struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
uint32_t in_past_ms);
|
||
|
|
|
||
|
|
bool (*is_stream_active_remotely)(const struct audio_policy *pol,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
uint32_t in_past_ms);
|
||
|
|
|
||
|
|
bool (*is_source_active)(const struct audio_policy *pol,
|
||
|
|
audio_source_t source);
|
||
|
|
|
||
|
|
/* dump state */
|
||
|
|
int (*dump)(const struct audio_policy *pol, int fd);
|
||
|
|
|
||
|
|
/* check if offload is possible for given sample rate, bitrate, duration, ... */
|
||
|
|
bool (*is_offload_supported)(const struct audio_policy *pol,
|
||
|
|
const audio_offload_info_t *info);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
struct audio_policy_service_ops {
|
||
|
|
/*
|
||
|
|
* Audio output Control functions
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Opens an audio output with the requested parameters.
|
||
|
|
*
|
||
|
|
* The parameter values can indicate to use the default values in case the
|
||
|
|
* audio policy manager has no specific requirements for the output being
|
||
|
|
* opened.
|
||
|
|
*
|
||
|
|
* When the function returns, the parameter values reflect the actual
|
||
|
|
* values used by the audio hardware output stream.
|
||
|
|
*
|
||
|
|
* The audio policy manager can check if the proposed parameters are
|
||
|
|
* suitable or not and act accordingly.
|
||
|
|
*/
|
||
|
|
audio_io_handle_t (*open_output)(void *service,
|
||
|
|
audio_devices_t *pDevices,
|
||
|
|
uint32_t *pSamplingRate,
|
||
|
|
audio_format_t *pFormat,
|
||
|
|
audio_channel_mask_t *pChannelMask,
|
||
|
|
uint32_t *pLatencyMs,
|
||
|
|
audio_output_flags_t flags);
|
||
|
|
|
||
|
|
/* creates a special output that is duplicated to the two outputs passed as
|
||
|
|
* arguments. The duplication is performed by
|
||
|
|
* a special mixer thread in the AudioFlinger.
|
||
|
|
*/
|
||
|
|
audio_io_handle_t (*open_duplicate_output)(void *service,
|
||
|
|
audio_io_handle_t output1,
|
||
|
|
audio_io_handle_t output2);
|
||
|
|
|
||
|
|
/* closes the output stream */
|
||
|
|
int (*close_output)(void *service, audio_io_handle_t output);
|
||
|
|
|
||
|
|
/* suspends the output.
|
||
|
|
*
|
||
|
|
* When an output is suspended, the corresponding audio hardware output
|
||
|
|
* stream is placed in standby and the AudioTracks attached to the mixer
|
||
|
|
* thread are still processed but the output mix is discarded.
|
||
|
|
*/
|
||
|
|
int (*suspend_output)(void *service, audio_io_handle_t output);
|
||
|
|
|
||
|
|
/* restores a suspended output. */
|
||
|
|
int (*restore_output)(void *service, audio_io_handle_t output);
|
||
|
|
|
||
|
|
/* */
|
||
|
|
/* Audio input Control functions */
|
||
|
|
/* */
|
||
|
|
|
||
|
|
/* opens an audio input
|
||
|
|
* deprecated - new implementations should use open_input_on_module,
|
||
|
|
* and the acoustics parameter is ignored
|
||
|
|
*/
|
||
|
|
audio_io_handle_t (*open_input)(void *service,
|
||
|
|
audio_devices_t *pDevices,
|
||
|
|
uint32_t *pSamplingRate,
|
||
|
|
audio_format_t *pFormat,
|
||
|
|
audio_channel_mask_t *pChannelMask,
|
||
|
|
audio_in_acoustics_t acoustics);
|
||
|
|
|
||
|
|
/* closes an audio input */
|
||
|
|
int (*close_input)(void *service, audio_io_handle_t input);
|
||
|
|
|
||
|
|
/* */
|
||
|
|
/* misc control functions */
|
||
|
|
/* */
|
||
|
|
|
||
|
|
/* set a stream volume for a particular output.
|
||
|
|
*
|
||
|
|
* For the same user setting, a given stream type can have different
|
||
|
|
* volumes for each output (destination device) it is attached to.
|
||
|
|
*/
|
||
|
|
int (*set_stream_volume)(void *service,
|
||
|
|
audio_stream_type_t stream,
|
||
|
|
float volume,
|
||
|
|
audio_io_handle_t output,
|
||
|
|
int delay_ms);
|
||
|
|
|
||
|
|
/* invalidate a stream type, causing a reroute to an unspecified new output */
|
||
|
|
int (*invalidate_stream)(void *service,
|
||
|
|
audio_stream_type_t stream);
|
||
|
|
|
||
|
|
/* function enabling to send proprietary informations directly from audio
|
||
|
|
* policy manager to audio hardware interface. */
|
||
|
|
void (*set_parameters)(void *service,
|
||
|
|
audio_io_handle_t io_handle,
|
||
|
|
const char *kv_pairs,
|
||
|
|
int delay_ms);
|
||
|
|
|
||
|
|
/* function enabling to receive proprietary informations directly from
|
||
|
|
* audio hardware interface to audio policy manager.
|
||
|
|
*
|
||
|
|
* Returns a pointer to a heap allocated string. The caller is responsible
|
||
|
|
* for freeing the memory for it using free().
|
||
|
|
*/
|
||
|
|
|
||
|
|
char * (*get_parameters)(void *service, audio_io_handle_t io_handle,
|
||
|
|
const char *keys);
|
||
|
|
|
||
|
|
/* request the playback of a tone on the specified stream.
|
||
|
|
* used for instance to replace notification sounds when playing over a
|
||
|
|
* telephony device during a phone call.
|
||
|
|
*/
|
||
|
|
int (*start_tone)(void *service,
|
||
|
|
audio_policy_tone_t tone,
|
||
|
|
audio_stream_type_t stream);
|
||
|
|
|
||
|
|
int (*stop_tone)(void *service);
|
||
|
|
|
||
|
|
/* set down link audio volume. */
|
||
|
|
int (*set_voice_volume)(void *service,
|
||
|
|
float volume,
|
||
|
|
int delay_ms);
|
||
|
|
|
||
|
|
/* move effect to the specified output */
|
||
|
|
int (*move_effects)(void *service,
|
||
|
|
int session,
|
||
|
|
audio_io_handle_t src_output,
|
||
|
|
audio_io_handle_t dst_output);
|
||
|
|
|
||
|
|
/* loads an audio hw module.
|
||
|
|
*
|
||
|
|
* The module name passed is the base name of the HW module library, e.g "primary" or "a2dp".
|
||
|
|
* The function returns a handle on the module that will be used to specify a particular
|
||
|
|
* module when calling open_output_on_module() or open_input_on_module()
|
||
|
|
*/
|
||
|
|
audio_module_handle_t (*load_hw_module)(void *service,
|
||
|
|
const char *name);
|
||
|
|
|
||
|
|
/* Opens an audio output on a particular HW module.
|
||
|
|
*
|
||
|
|
* Same as open_output() but specifying a specific HW module on which the output must be opened.
|
||
|
|
*/
|
||
|
|
audio_io_handle_t (*open_output_on_module)(void *service,
|
||
|
|
audio_module_handle_t module,
|
||
|
|
audio_devices_t *pDevices,
|
||
|
|
uint32_t *pSamplingRate,
|
||
|
|
audio_format_t *pFormat,
|
||
|
|
audio_channel_mask_t *pChannelMask,
|
||
|
|
uint32_t *pLatencyMs,
|
||
|
|
audio_output_flags_t flags,
|
||
|
|
const audio_offload_info_t *offloadInfo);
|
||
|
|
|
||
|
|
/* Opens an audio input on a particular HW module.
|
||
|
|
*
|
||
|
|
* Same as open_input() but specifying a specific HW module on which the input must be opened.
|
||
|
|
* Also removed deprecated acoustics parameter
|
||
|
|
*/
|
||
|
|
audio_io_handle_t (*open_input_on_module)(void *service,
|
||
|
|
audio_module_handle_t module,
|
||
|
|
audio_devices_t *pDevices,
|
||
|
|
uint32_t *pSamplingRate,
|
||
|
|
audio_format_t *pFormat,
|
||
|
|
audio_channel_mask_t *pChannelMask);
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
/**********************************************************************/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
|
||
|
|
* and the fields of this data structure must begin with hw_module_t
|
||
|
|
* followed by module specific information.
|
||
|
|
*/
|
||
|
|
typedef struct audio_policy_module {
|
||
|
|
struct hw_module_t common;
|
||
|
|
} audio_policy_module_t;
|
||
|
|
|
||
|
|
struct audio_policy_device {
|
||
|
|
/**
|
||
|
|
* Common methods of the audio policy device. This *must* be the first member of
|
||
|
|
* audio_policy_device as users of this structure will cast a hw_device_t to
|
||
|
|
* audio_policy_device pointer in contexts where it's known the hw_device_t references an
|
||
|
|
* audio_policy_device.
|
||
|
|
*/
|
||
|
|
struct hw_device_t common;
|
||
|
|
|
||
|
|
int (*create_audio_policy)(const struct audio_policy_device *device,
|
||
|
|
struct audio_policy_service_ops *aps_ops,
|
||
|
|
void *service,
|
||
|
|
struct audio_policy **ap);
|
||
|
|
|
||
|
|
int (*destroy_audio_policy)(const struct audio_policy_device *device,
|
||
|
|
struct audio_policy *ap);
|
||
|
|
};
|
||
|
|
|
||
|
|
/** convenience API for opening and closing a supported device */
|
||
|
|
|
||
|
|
static inline int audio_policy_dev_open(const hw_module_t* module,
|
||
|
|
struct audio_policy_device** device)
|
||
|
|
{
|
||
|
|
return module->methods->open(module, AUDIO_POLICY_INTERFACE,
|
||
|
|
(hw_device_t**)device);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int audio_policy_dev_close(struct audio_policy_device* device)
|
||
|
|
{
|
||
|
|
return device->common.close(&device->common);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
|
||
|
|
#endif // ANDROID_AUDIO_POLICY_INTERFACE_H
|