1 /*
2  * Copyright (C) 2015 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_AUDIO_IO_DESCRIPTOR_H
18 #define ANDROID_AUDIO_IO_DESCRIPTOR_H
19 
20 namespace android {
21 
22 enum audio_io_config_event {
23     AUDIO_OUTPUT_REGISTERED,
24     AUDIO_OUTPUT_OPENED,
25     AUDIO_OUTPUT_CLOSED,
26     AUDIO_OUTPUT_CONFIG_CHANGED,
27     AUDIO_INPUT_REGISTERED,
28     AUDIO_INPUT_OPENED,
29     AUDIO_INPUT_CLOSED,
30     AUDIO_INPUT_CONFIG_CHANGED,
31     AUDIO_CLIENT_STARTED,
32 };
33 
34 // audio input/output descriptor used to cache output configurations in client process to avoid
35 // frequent calls through IAudioFlinger
36 class AudioIoDescriptor : public RefBase {
37 public:
AudioIoDescriptor()38     AudioIoDescriptor() :
39         mIoHandle(AUDIO_IO_HANDLE_NONE),
40         mSamplingRate(0), mFormat(AUDIO_FORMAT_DEFAULT), mChannelMask(AUDIO_CHANNEL_NONE),
41         mFrameCount(0), mFrameCountHAL(0), mLatency(0), mPortId(AUDIO_PORT_HANDLE_NONE)
42     {
43         memset(&mPatch, 0, sizeof(struct audio_patch));
44     }
45 
~AudioIoDescriptor()46     virtual ~AudioIoDescriptor() {}
47 
getDeviceId()48     audio_port_handle_t getDeviceId() {
49         if (mPatch.num_sources != 0 && mPatch.num_sinks != 0) {
50             if (mPatch.sources[0].type == AUDIO_PORT_TYPE_MIX) {
51                 // this is an output mix
52                 // FIXME: the API only returns the first device in case of multiple device selection
53                 return mPatch.sinks[0].id;
54             } else {
55                 // this is an input mix
56                 return mPatch.sources[0].id;
57             }
58         }
59         return AUDIO_PORT_HANDLE_NONE;
60     }
61 
62     audio_io_handle_t       mIoHandle;
63     struct audio_patch      mPatch;
64     uint32_t                mSamplingRate;
65     audio_format_t          mFormat;
66     audio_channel_mask_t    mChannelMask;
67     size_t                  mFrameCount;
68     size_t                  mFrameCountHAL;
69     uint32_t                mLatency;   // only valid for output
70     audio_port_handle_t     mPortId;    // valid for event AUDIO_CLIENT_STARTED
71 };
72 
73 
74 };  // namespace android
75 
76 #endif  /*ANDROID_AUDIO_IO_DESCRIPTOR_H*/
77