1/*
2 * Copyright (C) 2018 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
17package [email protected];
18
19import [email protected];
20import IStreamIn;
21import IStreamOut;
22
23interface IDevice {
24    /**
25     * Returns whether the audio hardware interface has been initialized.
26     *
27     * @return retval OK on success, NOT_INITIALIZED on failure.
28     */
29    initCheck() generates (Result retval);
30
31    /**
32     * Sets the audio volume for all audio activities other than voice call. If
33     * NOT_SUPPORTED is returned, the software mixer will emulate this
34     * capability.
35     *
36     * @param volume 1.0f means unity, 0.0f is zero.
37     * @return retval operation completion status.
38     */
39    setMasterVolume(float volume) generates (Result retval);
40
41    /**
42     * Get the current master volume value for the HAL, if the HAL supports
43     * master volume control. For example, AudioFlinger will query this value
44     * from the primary audio HAL when the service starts and use the value for
45     * setting the initial master volume across all HALs. HALs which do not
46     * support this method must return NOT_SUPPORTED in 'retval'.
47     *
48     * @return retval operation completion status.
49     * @return volume 1.0f means unity, 0.0f is zero.
50     */
51    getMasterVolume() generates (Result retval, float volume);
52
53    /**
54     * Sets microphone muting state.
55     *
56     * @param mute whether microphone is muted.
57     * @return retval operation completion status.
58     */
59    setMicMute(bool mute) generates (Result retval);
60
61    /**
62     * Gets whether microphone is muted.
63     *
64     * @return retval operation completion status.
65     * @return mute whether microphone is muted.
66     */
67    getMicMute() generates (Result retval, bool mute);
68
69    /**
70     * Set the audio mute status for all audio activities. If the return value
71     * is NOT_SUPPORTED, the software mixer will emulate this capability.
72     *
73     * @param mute whether audio is muted.
74     * @return retval operation completion status.
75     */
76    setMasterMute(bool mute) generates (Result retval);
77
78    /**
79     * Get the current master mute status for the HAL, if the HAL supports
80     * master mute control. AudioFlinger will query this value from the primary
81     * audio HAL when the service starts and use the value for setting the
82     * initial master mute across all HALs. HAL must indicate that the feature
83     * is not supported by returning NOT_SUPPORTED status.
84     *
85     * @return retval operation completion status.
86     * @return mute whether audio is muted.
87     */
88    getMasterMute() generates (Result retval, bool mute);
89
90    /**
91     * Returns audio input buffer size according to parameters passed or
92     * INVALID_ARGUMENTS if one of the parameters is not supported.
93     *
94     * @param config audio configuration.
95     * @return retval operation completion status.
96     * @return bufferSize input buffer size in bytes.
97     */
98    getInputBufferSize(AudioConfig config)
99            generates (Result retval, uint64_t bufferSize);
100
101    /**
102     * This method creates and opens the audio hardware output stream.
103     * If the stream can not be opened with the proposed audio config,
104     * HAL must provide suggested values for the audio config.
105     *
106     * @param ioHandle handle assigned by AudioFlinger.
107     * @param device device type and (if needed) address.
108     * @param config stream configuration.
109     * @param flags additional flags.
110     * @param sourceMetadata Description of the audio that will be played.
111                             May be used by implementations to configure hardware effects.
112     * @return retval operation completion status.
113     * @return outStream created output stream.
114     * @return suggestedConfig in case of invalid parameters, suggested config.
115     */
116    openOutputStream(
117            AudioIoHandle ioHandle,
118            DeviceAddress device,
119            AudioConfig config,
120            bitfield<AudioOutputFlag> flags,
121            SourceMetadata sourceMetadata) generates (
122                    Result retval,
123                    IStreamOut outStream,
124                    AudioConfig suggestedConfig);
125
126    /**
127     * This method creates and opens the audio hardware input stream.
128     * If the stream can not be opened with the proposed audio config,
129     * HAL must provide suggested values for the audio config.
130     *
131     * @param ioHandle handle assigned by AudioFlinger.
132     * @param device device type and (if needed) address.
133     * @param config stream configuration.
134     * @param flags additional flags.
135     * @param sinkMetadata Description of the audio that is suggested by the client.
136     *                     May be used by implementations to configure hardware effects.
137     * @return retval operation completion status.
138     * @return inStream in case of success, created input stream.
139     * @return suggestedConfig in case of invalid parameters, suggested config.
140     */
141    openInputStream(
142            AudioIoHandle ioHandle,
143            DeviceAddress device,
144            AudioConfig config,
145            bitfield<AudioInputFlag> flags,
146            SinkMetadata sinkMetadata) generates (
147                    Result retval,
148                    IStreamIn inStream,
149                    AudioConfig suggestedConfig);
150
151    /**
152     * Returns whether HAL supports audio patches.
153     *
154     * @return supports true if audio patches are supported.
155     */
156    supportsAudioPatches() generates (bool supports);
157
158    /**
159     * Creates an audio patch between several source and sink ports.  The handle
160     * is allocated by the HAL and must be unique for this audio HAL module.
161     *
162     * @param sources patch sources.
163     * @param sinks patch sinks.
164     * @return retval operation completion status.
165     * @return patch created patch handle.
166     */
167    createAudioPatch(vec<AudioPortConfig> sources, vec<AudioPortConfig> sinks)
168            generates (Result retval, AudioPatchHandle patch);
169
170    /**
171     * Release an audio patch.
172     *
173     * @param patch patch handle.
174     * @return retval operation completion status.
175     */
176    releaseAudioPatch(AudioPatchHandle patch) generates (Result retval);
177
178    /**
179     * Returns the list of supported attributes for a given audio port.
180     *
181     * As input, 'port' contains the information (type, role, address etc...)
182     * needed by the HAL to identify the port.
183     *
184     * As output, 'resultPort' contains possible attributes (sampling rates,
185     * formats, channel masks, gain controllers...) for this port.
186     *
187     * @param port port identifier.
188     * @return retval operation completion status.
189     * @return resultPort port descriptor with all parameters filled up.
190     */
191    getAudioPort(AudioPort port)
192            generates (Result retval, AudioPort resultPort);
193
194    /**
195     * Set audio port configuration.
196     *
197     * @param config audio port configuration.
198     * @return retval operation completion status.
199     */
200    setAudioPortConfig(AudioPortConfig config) generates (Result retval);
201
202    /**
203     * Gets the HW synchronization source of the device. Calling this method is
204     * equivalent to getting AUDIO_PARAMETER_HW_AV_SYNC on the legacy HAL.
205     * Optional method
206     *
207     * @return retval operation completion status: OK or NOT_SUPPORTED.
208     * @return hwAvSync HW synchronization source
209     */
210    getHwAvSync() generates (Result retval, AudioHwSync hwAvSync);
211
212    /**
213     * Sets whether the screen is on. Calling this method is equivalent to
214     * setting AUDIO_PARAMETER_KEY_SCREEN_STATE on the legacy HAL.
215     * Optional method
216     *
217     * @param turnedOn whether the screen is turned on.
218     * @return retval operation completion status.
219     */
220    setScreenState(bool turnedOn) generates (Result retval);
221
222    /**
223     * Generic method for retrieving vendor-specific parameter values.
224     * The framework does not interpret the parameters, they are passed
225     * in an opaque manner between a vendor application and HAL.
226     *
227     * Multiple parameters can be retrieved at the same time.
228     * The implementation should return as many requested parameters
229     * as possible, even if one or more is not supported
230     *
231     * @param context provides more information about the request
232     * @param keys keys of the requested parameters
233     * @return retval operation completion status.
234     *         OK must be returned if keys is empty.
235     *         NOT_SUPPORTED must be returned if at least one key is unknown.
236     * @return parameters parameter key value pairs.
237     *         Must contain the value of all requested keys if retval == OK
238     */
239    getParameters(vec<ParameterValue> context, vec<string> keys)
240            generates (Result retval, vec<ParameterValue> parameters);
241
242    /**
243     * Generic method for setting vendor-specific parameter values.
244     * The framework does not interpret the parameters, they are passed
245     * in an opaque manner between a vendor application and HAL.
246     *
247     * Multiple parameters can be set at the same time though this is
248     * discouraged as it make failure analysis harder.
249     *
250     * If possible, a failed setParameters should not impact the platform state.
251     *
252     * @param context provides more information about the request
253     * @param parameters parameter key value pairs.
254     * @return retval operation completion status.
255     *         All parameters must be successfully set for OK to be returned
256     */
257    setParameters(vec<ParameterValue> context, vec<ParameterValue> parameters)
258            generates (Result retval);
259
260    /**
261     * Returns an array with available microphones in device.
262     *
263     * @return retval INVALID_STATE if the call is not successful,
264     *                OK otherwise.
265     *
266     * @return microphones array with microphones info
267     */
268    getMicrophones()
269         generates(Result retval, vec<MicrophoneInfo> microphones);
270
271    /**
272     * Notifies the device module about the connection state of an input/output
273     * device attached to it. Calling this method is equivalent to setting
274     * AUDIO_PARAMETER_DEVICE_[DIS]CONNECT on the legacy HAL.
275     *
276     * @param address audio device specification.
277     * @param connected whether the device is connected.
278     * @return retval operation completion status.
279     */
280    setConnectedState(DeviceAddress address, bool connected)
281            generates (Result retval);
282};
283