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/*
**
** Copyright 2007, 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_HW_DEVICE_H
#define ANDROID_AUDIO_HW_DEVICE_H
#include <stdint.h>
#include <stdlib.h>
#include <sys/types.h>
#include <hardware/audio.h>
#include <utils/Errors.h>
#include <system/audio.h>
namespace android {
class AudioStreamOut;
class AudioHwDevice {
public:
enum Flags {
AHWD_CAN_SET_MASTER_VOLUME = 0x1,
AHWD_CAN_SET_MASTER_MUTE = 0x2,
};
AudioHwDevice(audio_module_handle_t handle,
const char *moduleName,
audio_hw_device_t *hwDevice,
Flags flags)
: mHandle(handle)
, mModuleName(strdup(moduleName))
, mHwDevice(hwDevice)
, mFlags(flags) { }
virtual ~AudioHwDevice() { free((void *)mModuleName); }
bool canSetMasterVolume() const {
return (0 != (mFlags & AHWD_CAN_SET_MASTER_VOLUME));
}
bool canSetMasterMute() const {
return (0 != (mFlags & AHWD_CAN_SET_MASTER_MUTE));
}
audio_module_handle_t handle() const { return mHandle; }
const char *moduleName() const { return mModuleName; }
audio_hw_device_t *hwDevice() const { return mHwDevice; }
uint32_t version() const { return mHwDevice->common.version; }
/** This method creates and opens the audio hardware output stream.
* The "address" parameter qualifies the "devices" audio device type if needed.
* The format format depends on the device type:
* - Bluetooth devices use the MAC address of the device in the form "00:11:22:AA:BB:CC"
* - USB devices use the ALSA card and device numbers in the form "card=X;device=Y"
* - Other devices may use a number or any other string.
*/
status_t openOutputStream(
AudioStreamOut **ppStreamOut,
audio_io_handle_t handle,
audio_devices_t devices,
audio_output_flags_t flags,
struct audio_config *config,
const char *address);
private:
const audio_module_handle_t mHandle;
const char * const mModuleName;
audio_hw_device_t * const mHwDevice;
const Flags mFlags;
};
} // namespace android
#endif // ANDROID_AUDIO_HW_DEVICE_H
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