AudioIoDescriptor.h revision ad2e7b902c0432a0db40906a4b1f5b693ce439dd 
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
20namespace android {
21
22enum 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};
32
33// audio input/output descriptor used to cache output configurations in client process to avoid
34// frequent calls through IAudioFlinger
35class AudioIoDescriptor : public RefBase {
36public:
37    AudioIoDescriptor() :
38        mIoHandle(AUDIO_IO_HANDLE_NONE),
39        mSamplingRate(0), mFormat(AUDIO_FORMAT_DEFAULT), mChannelMask(AUDIO_CHANNEL_NONE),
40        mFrameCount(0), mFrameCountHAL(0), mLatency(0)
41    {
42        memset(&mPatch, 0, sizeof(struct audio_patch));
43    }
44
45    virtual ~AudioIoDescriptor() {}
46
47    audio_port_handle_t getDeviceId() {
48        if (mPatch.num_sources != 0 && mPatch.num_sinks != 0) {
49            if (mPatch.sources[0].type == AUDIO_PORT_TYPE_MIX) {
50                // this is an output mix
51                // FIXME: the API only returns the first device in case of multiple device selection
52                return mPatch.sinks[0].id;
53            } else {
54                // this is an input mix
55                return mPatch.sources[0].id;
56            }
57        }
58        return AUDIO_PORT_HANDLE_NONE;
59    }
60
61    audio_io_handle_t       mIoHandle;
62    struct audio_patch      mPatch;
63    uint32_t                mSamplingRate;
64    audio_format_t          mFormat;
65    audio_channel_mask_t    mChannelMask;
66    size_t                  mFrameCount;
67    size_t                  mFrameCountHAL;
68    uint32_t                mLatency;   // only valid for output
69};
70
71
72};  // namespace android
73
74#endif  /*ANDROID_AUDIO_IO_DESCRIPTOR_H*/
75