1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HARDWARE_DEVICE_HAL_INTERFACE_H 18 #define ANDROID_HARDWARE_DEVICE_HAL_INTERFACE_H 19 20 #include <media/MicrophoneInfo.h> 21 #include <system/audio.h> 22 #include <utils/Errors.h> 23 #include <utils/RefBase.h> 24 #include <utils/String8.h> 25 26 namespace android { 27 28 class StreamInHalInterface; 29 class StreamOutHalInterface; 30 31 class DeviceHalInterface : public RefBase 32 { 33 public: 34 // Sets the value of 'devices' to a bitmask of 1 or more values of audio_devices_t. 35 virtual status_t getSupportedDevices(uint32_t *devices) = 0; 36 37 // Check to see if the audio hardware interface has been initialized. 38 virtual status_t initCheck() = 0; 39 40 // Set the audio volume of a voice call. Range is between 0.0 and 1.0. 41 virtual status_t setVoiceVolume(float volume) = 0; 42 43 // Set the audio volume for all audio activities other than voice call. 44 virtual status_t setMasterVolume(float volume) = 0; 45 46 // Get the current master volume value for the HAL. 47 virtual status_t getMasterVolume(float *volume) = 0; 48 49 // Called when the audio mode changes. 50 virtual status_t setMode(audio_mode_t mode) = 0; 51 52 // Muting control. 53 virtual status_t setMicMute(bool state) = 0; 54 virtual status_t getMicMute(bool *state) = 0; 55 virtual status_t setMasterMute(bool state) = 0; 56 virtual status_t getMasterMute(bool *state) = 0; 57 58 // Set global audio parameters. 59 virtual status_t setParameters(const String8& kvPairs) = 0; 60 61 // Get global audio parameters. 62 virtual status_t getParameters(const String8& keys, String8 *values) = 0; 63 64 // Returns audio input buffer size according to parameters passed. 65 virtual status_t getInputBufferSize(const struct audio_config *config, 66 size_t *size) = 0; 67 68 // Creates and opens the audio hardware output stream. The stream is closed 69 // by releasing all references to the returned object. 70 virtual status_t openOutputStream( 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 sp<StreamOutHalInterface> *outStream) = 0; 77 78 // Creates and opens the audio hardware input stream. The stream is closed 79 // by releasing all references to the returned object. 80 virtual status_t openInputStream( 81 audio_io_handle_t handle, 82 audio_devices_t devices, 83 struct audio_config *config, 84 audio_input_flags_t flags, 85 const char *address, 86 audio_source_t source, 87 sp<StreamInHalInterface> *inStream) = 0; 88 89 // Returns whether createAudioPatch and releaseAudioPatch operations are supported. 90 virtual status_t supportsAudioPatches(bool *supportsPatches) = 0; 91 92 // Creates an audio patch between several source and sink ports. 93 virtual status_t createAudioPatch( 94 unsigned int num_sources, 95 const struct audio_port_config *sources, 96 unsigned int num_sinks, 97 const struct audio_port_config *sinks, 98 audio_patch_handle_t *patch) = 0; 99 100 // Releases an audio patch. 101 virtual status_t releaseAudioPatch(audio_patch_handle_t patch) = 0; 102 103 // Fills the list of supported attributes for a given audio port. 104 virtual status_t getAudioPort(struct audio_port *port) = 0; 105 106 // Set audio port configuration. 107 virtual status_t setAudioPortConfig(const struct audio_port_config *config) = 0; 108 109 // List microphones 110 virtual status_t getMicrophones(std::vector<media::MicrophoneInfo> *microphones) = 0; 111 112 virtual status_t dump(int fd) = 0; 113 114 protected: 115 // Subclasses can not be constructed directly by clients. 116 DeviceHalInterface() {} 117 118 // The destructor automatically closes the device. 119 virtual ~DeviceHalInterface() {} 120 }; 121 122 } // namespace android 123 124 #endif // ANDROID_HARDWARE_DEVICE_HAL_INTERFACE_H 125
