FastMixer.cpp revision 288ed2103d96f3aabd7e6bea3c080ab6db164049
197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten/* 297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * Copyright (C) 2012 The Android Open Source Project 397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * 497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * you may not use this file except in compliance with the License. 697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * You may obtain a copy of the License at 797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * 897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * 1097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * Unless required by applicable law or agreed to in writing, software 1197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 1297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * See the License for the specific language governing permissions and 1497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten * limitations under the License. 1597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten */ 1697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 1797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#define LOG_TAG "FastMixer" 1897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten//#define LOG_NDEBUG 0 1997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 2097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include <sys/atomics.h> 2197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include <time.h> 2297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include <utils/Log.h> 2397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include <system/audio.h> 2497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#ifdef FAST_MIXER_STATISTICS 2597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include <cpustats/CentralTendencyStatistics.h> 2697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 2797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include "AudioMixer.h" 2897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#include "FastMixer.h" 2997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 3097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#define FAST_HOT_IDLE_NS 1000000L // 1 ms: time to sleep while hot idling 3197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#define FAST_DEFAULT_NS 999999999L // ~1 sec: default time to sleep 32288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten#define MAX_WARMUP_CYCLES 10 // maximum number of loop cycles to wait for warmup 3397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 3497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kastennamespace android { 3597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 3697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten// Fast mixer thread 3797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kastenbool FastMixer::threadLoop() 3897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten{ 3997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten static const FastMixerState initial; 4097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const FastMixerState *previous = &initial, *current = &initial; 4197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten FastMixerState preIdle; // copy of state before we went into idle 4297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten struct timespec oldTs = {0, 0}; 4397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten bool oldTsValid = false; 4497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten long slopNs = 0; // accumulated time we've woken up too early (> 0) or too late (< 0) 4597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten long sleepNs = -1; // -1: busy wait, 0: sched_yield, > 0: nanosleep 4697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int fastTrackNames[FastMixerState::kMaxFastTracks]; // handles used by mixer to identify tracks 4797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int generations[FastMixerState::kMaxFastTracks]; // last observed mFastTracks[i].mGeneration 4897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned i; 4997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten for (i = 0; i < FastMixerState::kMaxFastTracks; ++i) { 5097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fastTrackNames[i] = -1; 5197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten generations[i] = 0; 5297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 5397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten NBAIO_Sink *outputSink = NULL; 5497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int outputSinkGen = 0; 5597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten AudioMixer* mixer = NULL; 5697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten short *mixBuffer = NULL; 5797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten enum {UNDEFINED, MIXED, ZEROED} mixBufferState = UNDEFINED; 5897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten NBAIO_Format format = Format_Invalid; 5997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned sampleRate = 0; 6097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int fastTracksGen = 0; 6197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten long periodNs = 0; // expected period; the time required to render one mix buffer 62288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten long underrunNs = 0; // underrun likely when write cycle is greater than this value 63288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten long overrunNs = 0; // overrun likely when write cycle is less than this value 64288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten long warmupNs = 0; // warmup complete when write cycle is greater than to this value 6597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten FastMixerDumpState dummyDumpState, *dumpState = &dummyDumpState; 6697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten bool ignoreNextOverrun = true; // used to ignore initial overrun and first after an underrun 6797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#ifdef FAST_MIXER_STATISTICS 6897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten CentralTendencyStatistics cts; // cycle times in seconds 6997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten static const unsigned kMaxSamples = 1000; 7097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 7197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned coldGen = 0; // last observed mColdGen 72288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten bool isWarm = false; // true means ready to mix, false means wait for warmup before mixing 73288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten struct timespec measuredWarmupTs = {0, 0}; // how long did it take for warmup to complete 74288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten uint32_t warmupCycles = 0; // counter of number of loop cycles required to warmup 7597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 7697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten for (;;) { 7797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 7897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // either nanosleep, sched_yield, or busy wait 7997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (sleepNs >= 0) { 8097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (sleepNs > 0) { 8197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(sleepNs < 1000000000); 8297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const struct timespec req = {0, sleepNs}; 8397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten nanosleep(&req, NULL); 8497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 8597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sched_yield(); 8697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 8797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 8897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // default to long sleep for next cycle 8997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = FAST_DEFAULT_NS; 9097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 9197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // poll for state change 9297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const FastMixerState *next = mSQ.poll(); 9397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (next == NULL) { 9497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // continue to use the default initial state until a real state is available 9597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(current == &initial && previous == &initial); 9697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten next = current; 9797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 9897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 9997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten FastMixerState::Command command = next->mCommand; 10097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (next != current) { 10197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 10297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // As soon as possible of learning of a new dump area, start using it 10397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState = next->mDumpState != NULL ? next->mDumpState : &dummyDumpState; 10497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 10597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // We want to always have a valid reference to the previous (non-idle) state. 10697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // However, the state queue only guarantees access to current and previous states. 10797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // So when there is a transition from a non-idle state into an idle state, we make a 10897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // copy of the last known non-idle state so it is still available on return from idle. 10997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // The possible transitions are: 11097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // non-idle -> non-idle update previous from current in-place 11197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // non-idle -> idle update previous from copy of current 11297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // idle -> idle don't update previous 11397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // idle -> non-idle don't update previous 11497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (!(current->mCommand & FastMixerState::IDLE)) { 11597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (command & FastMixerState::IDLE) { 11697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten preIdle = *current; 11797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten current = &preIdle; 11897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten oldTsValid = false; 11997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ignoreNextOverrun = true; 12097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 12197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten previous = current; 12297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 12397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten current = next; 12497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 12597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#if !LOG_NDEBUG 12697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten next = NULL; // not referenced again 12797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 12897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 12997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mCommand = command; 13097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 13197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten switch (command) { 13297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::INITIAL: 13397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::HOT_IDLE: 13497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = FAST_HOT_IDLE_NS; 13597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten continue; 13697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::COLD_IDLE: 13797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // only perform a cold idle command once 13821e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten // FIXME consider checking previous state and only perform if previous != COLD_IDLE 13997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (current->mColdGen != coldGen) { 14097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int32_t *coldFutexAddr = current->mColdFutexAddr; 14197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(coldFutexAddr != NULL); 14297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int32_t old = android_atomic_dec(coldFutexAddr); 14397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (old <= 0) { 14497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten __futex_syscall4(coldFutexAddr, FUTEX_WAIT_PRIVATE, old - 1, NULL); 14597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 146288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // This may be overly conservative; there could be times that the normal mixer 147288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // requests such a brief cold idle that it doesn't require resetting this flag. 148288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten isWarm = false; 149288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten measuredWarmupTs.tv_sec = 0; 150288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten measuredWarmupTs.tv_nsec = 0; 151288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten warmupCycles = 0; 15297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = -1; 15397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten coldGen = current->mColdGen; 15497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 15597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = FAST_HOT_IDLE_NS; 15697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 15797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten continue; 15897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::EXIT: 15997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten delete mixer; 16097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten delete[] mixBuffer; 16197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten return false; 16297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::MIX: 16397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::WRITE: 16497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::MIX_WRITE: 16597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 16697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten default: 16797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten LOG_FATAL("bad command %d", command); 16897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 16997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 17097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // there is a non-idle state available to us; did the state change? 17197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten size_t frameCount = current->mFrameCount; 17297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (current != previous) { 17397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 17497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // handle state change here, but since we want to diff the state, 17597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // we're prepared for previous == &initial the first time through 17697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned previousTrackMask; 17797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 17897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // check for change in output HAL configuration 17997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten NBAIO_Format previousFormat = format; 18097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (current->mOutputSinkGen != outputSinkGen) { 18197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten outputSink = current->mOutputSink; 18297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten outputSinkGen = current->mOutputSinkGen; 18397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (outputSink == NULL) { 18497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten format = Format_Invalid; 18597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sampleRate = 0; 18697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 18797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten format = outputSink->format(); 18897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sampleRate = Format_sampleRate(format); 18997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(Format_channelCount(format) == 2); 19097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 19121e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten dumpState->mSampleRate = sampleRate; 19297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 19397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 19497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if ((format != previousFormat) || (frameCount != previous->mFrameCount)) { 19597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME to avoid priority inversion, don't delete here 19697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten delete mixer; 19797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer = NULL; 19897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten delete[] mixBuffer; 19997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixBuffer = NULL; 20097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (frameCount > 0 && sampleRate > 0) { 20197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME new may block for unbounded time at internal mutex of the heap 20297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // implementation; it would be better to have normal mixer allocate for us 20397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // to avoid blocking here and to prevent possible priority inversion 20497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer = new AudioMixer(frameCount, sampleRate, FastMixerState::kMaxFastTracks); 20597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixBuffer = new short[frameCount * 2]; 20697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten periodNs = (frameCount * 1000000000LL) / sampleRate; // 1.00 20797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten underrunNs = (frameCount * 1750000000LL) / sampleRate; // 1.75 20897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten overrunNs = (frameCount * 250000000LL) / sampleRate; // 0.25 209288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten warmupNs = (frameCount * 500000000LL) / sampleRate; // 0.50 21097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 21197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten periodNs = 0; 21297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten underrunNs = 0; 21397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten overrunNs = 0; 21497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 21597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixBufferState = UNDEFINED; 21697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#if !LOG_NDEBUG 21797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten for (i = 0; i < FastMixerState::kMaxFastTracks; ++i) { 21897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fastTrackNames[i] = -1; 21997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 22097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 22197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // we need to reconfigure all active tracks 22297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten previousTrackMask = 0; 22397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fastTracksGen = current->mFastTracksGen - 1; 22421e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten dumpState->mFrameCount = frameCount; 22597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 22697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten previousTrackMask = previous->mTrackMask; 22797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 22897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 22997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // check for change in active track set 23097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned currentTrackMask = current->mTrackMask; 23197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (current->mFastTracksGen != fastTracksGen) { 23297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(mixBuffer != NULL); 23397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int name; 23497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 23597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // process removed tracks first to avoid running out of track names 23697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned removedTracks = previousTrackMask & ~currentTrackMask; 23797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten while (removedTracks != 0) { 23897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten i = __builtin_ctz(removedTracks); 23997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten removedTracks &= ~(1 << i); 24097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const FastTrack* fastTrack = ¤t->mFastTracks[i]; 241288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten ALOG_ASSERT(fastTrack->mBufferProvider == NULL); 24297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (mixer != NULL) { 24397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten name = fastTrackNames[i]; 24497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(name >= 0); 24597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->deleteTrackName(name); 24697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 24797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#if !LOG_NDEBUG 24897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fastTrackNames[i] = -1; 24997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 250288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // don't reset track dump state, since other side is ignoring it 25197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten generations[i] = fastTrack->mGeneration; 25297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 25397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 25497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // now process added tracks 25597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned addedTracks = currentTrackMask & ~previousTrackMask; 25697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten while (addedTracks != 0) { 25797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten i = __builtin_ctz(addedTracks); 25897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten addedTracks &= ~(1 << i); 25997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const FastTrack* fastTrack = ¤t->mFastTracks[i]; 26097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten AudioBufferProvider *bufferProvider = fastTrack->mBufferProvider; 26197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(bufferProvider != NULL && fastTrackNames[i] == -1); 26297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (mixer != NULL) { 2639bd23229fdec1657398abc682ccccfce1c95f8aaJean-Michel Trivi // calling getTrackName with default channel mask 2649bd23229fdec1657398abc682ccccfce1c95f8aaJean-Michel Trivi name = mixer->getTrackName(AUDIO_CHANNEL_OUT_STEREO); 26597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(name >= 0); 26697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fastTrackNames[i] = name; 26797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setBufferProvider(name, bufferProvider); 26897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setParameter(name, AudioMixer::TRACK, AudioMixer::MAIN_BUFFER, 26997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (void *) mixBuffer); 27097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // newly allocated track names default to full scale volume 27121e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten if (fastTrack->mSampleRate != 0 && fastTrack->mSampleRate != sampleRate) { 27221e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mixer->setParameter(name, AudioMixer::RESAMPLE, 27321e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten AudioMixer::SAMPLE_RATE, (void*) fastTrack->mSampleRate); 27421e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten } 27521e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mixer->setParameter(name, AudioMixer::TRACK, AudioMixer::CHANNEL_MASK, 27621e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten (void *) fastTrack->mChannelMask); 27797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->enable(name); 27897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 27997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten generations[i] = fastTrack->mGeneration; 28097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 28197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 28297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // finally process modified tracks; these use the same slot 28397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // but may have a different buffer provider or volume provider 28497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten unsigned modifiedTracks = currentTrackMask & previousTrackMask; 28597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten while (modifiedTracks != 0) { 28697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten i = __builtin_ctz(modifiedTracks); 28797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten modifiedTracks &= ~(1 << i); 28897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const FastTrack* fastTrack = ¤t->mFastTracks[i]; 28997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (fastTrack->mGeneration != generations[i]) { 29097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten AudioBufferProvider *bufferProvider = fastTrack->mBufferProvider; 29197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(bufferProvider != NULL); 29297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (mixer != NULL) { 29397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten name = fastTrackNames[i]; 29497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(name >= 0); 29597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setBufferProvider(name, bufferProvider); 29697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (fastTrack->mVolumeProvider == NULL) { 29797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME0, 29897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (void *)0x1000); 29997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME1, 30097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (void *)0x1000); 30197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 30221e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten if (fastTrack->mSampleRate != 0 && 30321e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten fastTrack->mSampleRate != sampleRate) { 30421e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mixer->setParameter(name, AudioMixer::RESAMPLE, 30521e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten AudioMixer::SAMPLE_RATE, (void*) fastTrack->mSampleRate); 30621e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten } else { 30721e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mixer->setParameter(name, AudioMixer::RESAMPLE, 30821e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten AudioMixer::REMOVE, NULL); 30921e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten } 31021e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mixer->setParameter(name, AudioMixer::TRACK, AudioMixer::CHANNEL_MASK, 31121e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten (void *) fastTrack->mChannelMask); 31297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // already enabled 31397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 31497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten generations[i] = fastTrack->mGeneration; 31597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 31697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 31797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 31897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fastTracksGen = current->mFastTracksGen; 31997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 32097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mNumTracks = popcount(currentTrackMask); 32197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 32297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 32397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#if 1 // FIXME shouldn't need this 32497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // only process state change once 32597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten previous = current; 32697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 32797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 32897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 32997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // do work using current state here 330288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten if ((command & FastMixerState::MIX) && (mixer != NULL) && isWarm) { 33197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(mixBuffer != NULL); 332288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // for each track, update volume and check for underrun 333288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten unsigned currentTrackMask = current->mTrackMask; 334288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten while (currentTrackMask != 0) { 335288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten i = __builtin_ctz(currentTrackMask); 336288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten currentTrackMask &= ~(1 << i); 33797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten const FastTrack* fastTrack = ¤t->mFastTracks[i]; 33897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int name = fastTrackNames[i]; 33997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOG_ASSERT(name >= 0); 34097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (fastTrack->mVolumeProvider != NULL) { 34197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten uint32_t vlr = fastTrack->mVolumeProvider->getVolumeLR(); 34297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME0, 34397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (void *)(vlr & 0xFFFF)); 34497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME1, 34597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (void *)(vlr >> 16)); 34697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 347288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // FIXME The current implementation of framesReady() for fast tracks 348288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // takes a tryLock, which can block 349288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // up to 1 ms. If enough active tracks all blocked in sequence, this would result 350288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // in the overall fast mix cycle being delayed. Should use a non-blocking FIFO. 351288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten size_t framesReady = fastTrack->mBufferProvider->framesReady(); 352288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten FastTrackDump *ftDump = &dumpState->mTracks[i]; 353288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten uint32_t underruns = ftDump->mUnderruns; 354288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten if (framesReady < frameCount) { 355288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten ftDump->mUnderruns = (underruns + 2) | 1; 356288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten if (framesReady == 0) { 357288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mixer->disable(name); 358288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } else { 359288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // allow mixing partial buffer 360288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mixer->enable(name); 361288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } 362288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } else if (underruns & 1) { 363288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten ftDump->mUnderruns = underruns & ~1; 364288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mixer->enable(name); 365288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } 36697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 36797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // process() is CPU-bound 36897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixer->process(AudioBufferProvider::kInvalidPTS); 36997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixBufferState = MIXED; 37097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else if (mixBufferState == MIXED) { 37197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixBufferState = UNDEFINED; 37297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 373288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten bool attemptedWrite = false; 374288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten //bool didFullWrite = false; // dumpsys could display a count of partial writes 37597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if ((command & FastMixerState::WRITE) && (outputSink != NULL) && (mixBuffer != NULL)) { 37697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (mixBufferState == UNDEFINED) { 37797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten memset(mixBuffer, 0, frameCount * 2 * sizeof(short)); 37897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mixBufferState = ZEROED; 37997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 38097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME write() is non-blocking and lock-free for a properly implemented NBAIO sink, 38197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // but this code should be modified to handle both non-blocking and blocking sinks 38297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mWriteSequence++; 38397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ssize_t framesWritten = outputSink->write(mixBuffer, frameCount); 38497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mWriteSequence++; 38597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (framesWritten >= 0) { 386288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten ALOG_ASSERT(framesWritten <= frameCount); 38797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mFramesWritten += framesWritten; 388288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten //if ((size_t) framesWritten == frameCount) { 389288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // didFullWrite = true; 390288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten //} 39197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 39297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mWriteErrors++; 39397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 394288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten attemptedWrite = true; 39597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME count # of writes blocked excessively, CPU usage, etc. for dump 39697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 39797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 39897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // To be exactly periodic, compute the next sleep time based on current time. 39997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // This code doesn't have long-term stability when the sink is non-blocking. 40097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME To avoid drift, use the local audio clock or watch the sink's fill status. 40197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten struct timespec newTs; 40297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten int rc = clock_gettime(CLOCK_MONOTONIC, &newTs); 40397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (rc == 0) { 40497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (oldTsValid) { 40597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten time_t sec = newTs.tv_sec - oldTs.tv_sec; 40697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten long nsec = newTs.tv_nsec - oldTs.tv_nsec; 40797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (nsec < 0) { 40897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten --sec; 40997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten nsec += 1000000000; 41097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 411288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // To avoid an initial underrun on fast tracks after exiting standby, 412288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // do not start pulling data from tracks and mixing until warmup is complete. 413288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // Warmup is considered complete after the earlier of: 414288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // first successful single write() that blocks for more than warmupNs 415288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // MAX_WARMUP_CYCLES write() attempts. 416288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten // This is overly conservative, but to get better accuracy requires a new HAL API. 417288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten if (!isWarm && attemptedWrite) { 418288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten measuredWarmupTs.tv_sec += sec; 419288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten measuredWarmupTs.tv_nsec += nsec; 420288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten if (measuredWarmupTs.tv_nsec >= 1000000000) { 421288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten measuredWarmupTs.tv_sec++; 422288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten measuredWarmupTs.tv_nsec -= 1000000000; 423288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } 424288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten ++warmupCycles; 425288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten if ((attemptedWrite && nsec > warmupNs) || 426288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten (warmupCycles >= MAX_WARMUP_CYCLES)) { 427288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten isWarm = true; 428288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten dumpState->mMeasuredWarmupTs = measuredWarmupTs; 429288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten dumpState->mWarmupCycles = warmupCycles; 430288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } 431288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten } 43297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (sec > 0 || nsec > underrunNs) { 43397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME only log occasionally 43497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOGV("underrun: time since last cycle %d.%03ld sec", 43597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (int) sec, nsec / 1000000L); 43697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mUnderruns++; 43797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = -1; 43897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ignoreNextOverrun = true; 43997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else if (nsec < overrunNs) { 44097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (ignoreNextOverrun) { 44197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ignoreNextOverrun = false; 44297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 44397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // FIXME only log occasionally 44497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ALOGV("overrun: time since last cycle %d.%03ld sec", 44597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten (int) sec, nsec / 1000000L); 44697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mOverruns++; 44797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 44897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = periodNs - overrunNs; 44997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 45097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = -1; 45197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ignoreNextOverrun = false; 45297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 45397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#ifdef FAST_MIXER_STATISTICS 45497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // long-term statistics 45597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten cts.sample(sec + nsec * 1e-9); 45697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten if (cts.n() >= kMaxSamples) { 45797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mMean = cts.mean(); 45897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mMinimum = cts.minimum(); 45997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mMaximum = cts.maximum(); 46097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten dumpState->mStddev = cts.stddev(); 46197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten cts.reset(); 46297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 46397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 46497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 46597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // first time through the loop 46697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten oldTsValid = true; 46797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = periodNs; 46897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten ignoreNextOverrun = true; 46997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 47097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten oldTs = newTs; 47197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } else { 47297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // monotonic clock is broken 47397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten oldTsValid = false; 47497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten sleepNs = periodNs; 47597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 47697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 47797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } // for (;;) 47897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 47997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten // never return 'true'; Thread::_threadLoop() locks mutex which can result in priority inversion 48097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten} 48197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 48297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn KastenFastMixerDumpState::FastMixerDumpState() : 48397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mCommand(FastMixerState::INITIAL), mWriteSequence(0), mFramesWritten(0), 48421e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mNumTracks(0), mWriteErrors(0), mUnderruns(0), mOverruns(0), 485288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mSampleRate(0), mFrameCount(0), /* mMeasuredWarmupTs({0, 0}), */ mWarmupCycles(0) 48697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#ifdef FAST_MIXER_STATISTICS 48797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten , mMean(0.0), mMinimum(0.0), mMaximum(0.0), mStddev(0.0) 48897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 48997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten{ 490288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mMeasuredWarmupTs.tv_sec = 0; 491288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mMeasuredWarmupTs.tv_nsec = 0; 49297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten} 49397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 49497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn KastenFastMixerDumpState::~FastMixerDumpState() 49597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten{ 49697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten} 49797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 49897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kastenvoid FastMixerDumpState::dump(int fd) 49997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten{ 50097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#define COMMAND_MAX 32 50197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten char string[COMMAND_MAX]; 50297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten switch (mCommand) { 50397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::INITIAL: 50497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "INITIAL"); 50597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 50697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::HOT_IDLE: 50797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "HOT_IDLE"); 50897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 50997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::COLD_IDLE: 51097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "COLD_IDLE"); 51197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 51297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::EXIT: 51397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "EXIT"); 51497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 51597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::MIX: 51697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "MIX"); 51797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 51897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::WRITE: 51997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "WRITE"); 52097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 52197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten case FastMixerState::MIX_WRITE: 52297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten strcpy(string, "MIX_WRITE"); 52397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 52497b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten default: 52597b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten snprintf(string, COMMAND_MAX, "%d", mCommand); 52697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten break; 52797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten } 528288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten double mMeasuredWarmupMs = (mMeasuredWarmupTs.tv_sec * 1000.0) + 529288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten (mMeasuredWarmupTs.tv_nsec / 1000000.0); 53097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fdprintf(fd, "FastMixer command=%s writeSequence=%u framesWritten=%u\n" 53121e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten " numTracks=%u writeErrors=%u underruns=%u overruns=%u\n" 532288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten " sampleRate=%u frameCount=%u measuredWarmup=%.3g ms, warmupCycles=%u\n", 53397b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten string, mWriteSequence, mFramesWritten, 53421e8c50bd13ebe44f3088e26c9c6df0e163c469cGlenn Kasten mNumTracks, mWriteErrors, mUnderruns, mOverruns, 535288ed2103d96f3aabd7e6bea3c080ab6db164049Glenn Kasten mSampleRate, mFrameCount, mMeasuredWarmupMs, mWarmupCycles); 53697b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#ifdef FAST_MIXER_STATISTICS 53797b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten fdprintf(fd, " cycle time in ms: mean=%.1f min=%.1f max=%.1f stddev=%.1f\n", 53897b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten mMean*1e3, mMinimum*1e3, mMaximum*1e3, mStddev*1e3); 53997b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten#endif 54097b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten} 54197b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten 54297b5d0d5b5ef766eb5dd680d05a5d199662d4ae0Glenn Kasten} // namespace android 543