1 /* 2 * Copyright (C) 2014 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_FAST_MIXER_DUMP_STATE_H 18 #define ANDROID_AUDIO_FAST_MIXER_DUMP_STATE_H 19 20 #include <stdint.h> 21 #include <audio_utils/TimestampVerifier.h> 22 #include "Configuration.h" 23 #include "FastThreadDumpState.h" 24 #include "FastMixerState.h" 25 26 namespace android { 27 28 // Describes the underrun status for a single "pull" attempt 29 enum FastTrackUnderrunStatus { 30 UNDERRUN_FULL, // framesReady() is full frame count, no underrun 31 UNDERRUN_PARTIAL, // framesReady() is non-zero but < full frame count, partial underrun 32 UNDERRUN_EMPTY, // framesReady() is zero, total underrun 33 }; 34 35 // Underrun counters are not reset to zero for new tracks or if track generation changes. 36 // This packed representation is used to keep the information atomic. 37 union FastTrackUnderruns { 38 FastTrackUnderruns() { mAtomic = 0; 39 static_assert(sizeof(FastTrackUnderruns) == sizeof(uint32_t), "FastTrackUnderrun"); } 40 FastTrackUnderruns(const FastTrackUnderruns& copyFrom) : mAtomic(copyFrom.mAtomic) { } 41 FastTrackUnderruns& operator=(const FastTrackUnderruns& rhs) 42 { if (this != &rhs) mAtomic = rhs.mAtomic; return *this; } 43 struct { 44 #define UNDERRUN_BITS 10 45 #define UNDERRUN_MASK ((1 << UNDERRUN_BITS) - 1) 46 uint32_t mFull : UNDERRUN_BITS; // framesReady() is full frame count 47 uint32_t mPartial : UNDERRUN_BITS; // framesReady() is non-zero but < full frame count 48 uint32_t mEmpty : UNDERRUN_BITS; // framesReady() is zero 49 FastTrackUnderrunStatus mMostRecent : 2; // status of most recent framesReady() 50 } mBitFields; 51 private: 52 uint32_t mAtomic; 53 }; 54 55 // Represents the dump state of a fast track 56 struct FastTrackDump { 57 FastTrackDump() : mFramesReady(0) { } 58 /*virtual*/ ~FastTrackDump() { } 59 FastTrackUnderruns mUnderruns; 60 size_t mFramesReady; // most recent value only; no long-term statistics kept 61 int64_t mFramesWritten; // last value from track 62 }; 63 64 struct FastMixerDumpState : FastThreadDumpState { 65 FastMixerDumpState(); 66 /*virtual*/ ~FastMixerDumpState(); 67 68 void dump(int fd) const; // should only be called on a stable copy, not the original 69 70 double mLatencyMs = 0.; // measured latency, default of 0 if no valid timestamp read. 71 uint32_t mWriteSequence; // incremented before and after each write() 72 uint32_t mFramesWritten; // total number of frames written successfully 73 uint32_t mNumTracks; // total number of active fast tracks 74 uint32_t mWriteErrors; // total number of write() errors 75 uint32_t mSampleRate; 76 size_t mFrameCount; 77 uint32_t mTrackMask; // mask of active tracks 78 FastTrackDump mTracks[FastMixerState::kMaxFastTracks]; 79 80 // For timestamp statistics. 81 TimestampVerifier<int64_t /* frame count */, int64_t /* time ns */> mTimestampVerifier; 82 }; 83 84 } // android 85 86 #endif // ANDROID_AUDIO_FAST_MIXER_DUMP_STATE_H 87
