1 /* 2 ** 3 ** Copyright 2007, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #ifndef ANDROID_AUDIO_HW_DEVICE_H 19 #define ANDROID_AUDIO_HW_DEVICE_H 20 21 #include <stdint.h> 22 #include <stdlib.h> 23 #include <sys/types.h> 24 25 #include <media/audiohal/DeviceHalInterface.h> 26 #include <utils/Errors.h> 27 #include <system/audio.h> 28 29 namespace android { 30 31 class AudioStreamOut; 32 33 class AudioHwDevice { 34 public: 35 enum Flags { 36 AHWD_CAN_SET_MASTER_VOLUME = 0x1, 37 AHWD_CAN_SET_MASTER_MUTE = 0x2, 38 }; 39 AudioHwDevice(audio_module_handle_t handle,const char * moduleName,sp<DeviceHalInterface> hwDevice,Flags flags)40 AudioHwDevice(audio_module_handle_t handle, 41 const char *moduleName, 42 sp<DeviceHalInterface> hwDevice, 43 Flags flags) 44 : mHandle(handle) 45 , mModuleName(strdup(moduleName)) 46 , mHwDevice(hwDevice) 47 , mFlags(flags) { } ~AudioHwDevice()48 virtual ~AudioHwDevice() { free((void *)mModuleName); } 49 canSetMasterVolume()50 bool canSetMasterVolume() const { 51 return (0 != (mFlags & AHWD_CAN_SET_MASTER_VOLUME)); 52 } 53 canSetMasterMute()54 bool canSetMasterMute() const { 55 return (0 != (mFlags & AHWD_CAN_SET_MASTER_MUTE)); 56 } 57 handle()58 audio_module_handle_t handle() const { return mHandle; } moduleName()59 const char *moduleName() const { return mModuleName; } hwDevice()60 sp<DeviceHalInterface> hwDevice() const { return mHwDevice; } 61 62 /** This method creates and opens the audio hardware output stream. 63 * The "address" parameter qualifies the "devices" audio device type if needed. 64 * The format format depends on the device type: 65 * - Bluetooth devices use the MAC address of the device in the form "00:11:22:AA:BB:CC" 66 * - USB devices use the ALSA card and device numbers in the form "card=X;device=Y" 67 * - Other devices may use a number or any other string. 68 */ 69 status_t openOutputStream( 70 AudioStreamOut **ppStreamOut, 71 audio_io_handle_t handle, 72 audio_devices_t devices, 73 audio_output_flags_t flags, 74 struct audio_config *config, 75 const char *address); 76 77 bool supportsAudioPatches() const; 78 79 private: 80 const audio_module_handle_t mHandle; 81 const char * const mModuleName; 82 sp<DeviceHalInterface> mHwDevice; 83 const Flags mFlags; 84 }; 85 86 } // namespace android 87 88 #endif // ANDROID_AUDIO_HW_DEVICE_H 89