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 <android/media/audio/common/AudioMMapPolicyInfo.h> 26 #include <android/media/audio/common/AudioMMapPolicyType.h> 27 #include <media/audiohal/DeviceHalInterface.h> 28 #include <utils/Errors.h> 29 #include <system/audio.h> 30 31 namespace android { 32 33 class AudioStreamOut; 34 35 class AudioHwDevice { 36 public: 37 enum Flags { 38 AHWD_CAN_SET_MASTER_VOLUME = 0x1, 39 AHWD_CAN_SET_MASTER_MUTE = 0x2, 40 // Means that this isn't a terminal module, and software patches 41 // are used to transport audio data further. 42 AHWD_IS_INSERT = 0x4, 43 // This Module supports BT Latency mode control 44 AHWD_SUPPORTS_BT_LATENCY_MODES = 0x8, 45 }; 46 AudioHwDevice(audio_module_handle_t handle,const char * moduleName,const sp<DeviceHalInterface> & hwDevice,Flags flags)47 AudioHwDevice(audio_module_handle_t handle, 48 const char *moduleName, 49 const sp<DeviceHalInterface>& hwDevice, 50 Flags flags) 51 : mHandle(handle) 52 , mModuleName(strdup(moduleName)) 53 , mHwDevice(hwDevice) 54 , mFlags(flags) { } ~AudioHwDevice()55 virtual ~AudioHwDevice() { free((void *)mModuleName); } 56 canSetMasterVolume()57 bool canSetMasterVolume() const { 58 return (0 != (mFlags & AHWD_CAN_SET_MASTER_VOLUME)); 59 } 60 canSetMasterMute()61 bool canSetMasterMute() const { 62 return (0 != (mFlags & AHWD_CAN_SET_MASTER_MUTE)); 63 } 64 isInsert()65 bool isInsert() const { 66 return (0 != (mFlags & AHWD_IS_INSERT)); 67 } 68 supportsBluetoothVariableLatency()69 bool supportsBluetoothVariableLatency() const { 70 return (0 != (mFlags & AHWD_SUPPORTS_BT_LATENCY_MODES)); 71 } 72 handle()73 audio_module_handle_t handle() const { return mHandle; } moduleName()74 const char *moduleName() const { return mModuleName; } hwDevice()75 sp<DeviceHalInterface> hwDevice() const { return mHwDevice; } 76 77 /** This method creates and opens the audio hardware output stream. 78 * The "address" parameter qualifies the "devices" audio device type if needed. 79 * The format format depends on the device type: 80 * - Bluetooth devices use the MAC address of the device in the form "00:11:22:AA:BB:CC" 81 * - USB devices use the ALSA card and device numbers in the form "card=X;device=Y" 82 * - Other devices may use a number or any other string. 83 */ 84 status_t openOutputStream( 85 AudioStreamOut **ppStreamOut, 86 audio_io_handle_t handle, 87 audio_devices_t deviceType, 88 audio_output_flags_t flags, 89 struct audio_config *config, 90 const char *address); 91 92 bool supportsAudioPatches() const; 93 94 status_t getAudioPort(struct audio_port_v7 *port) const; 95 96 status_t getMmapPolicyInfos( 97 media::audio::common::AudioMMapPolicyType policyType, 98 std::vector<media::audio::common::AudioMMapPolicyInfo> *policyInfos) const; 99 100 int32_t getAAudioMixerBurstCount() const; 101 102 int32_t getAAudioHardwareBurstMinUsec() const; 103 104 private: 105 const audio_module_handle_t mHandle; 106 const char * const mModuleName; 107 sp<DeviceHalInterface> mHwDevice; 108 const Flags mFlags; 109 }; 110 111 } // namespace android 112 113 #endif // ANDROID_AUDIO_HW_DEVICE_H 114