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