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