blob: 29632022bbf98de93f9a3be9dda6b977c1bca695 [file] [log] [blame]
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "FastCapture"
//#define LOG_NDEBUG 0
#define ATRACE_TAG ATRACE_TAG_AUDIO
#include "Configuration.h"
#include <audio_utils/format.h>
#include <linux/futex.h>
#include <sys/syscall.h>
#include <media/AudioBufferProvider.h>
#include <utils/Log.h>
#include <utils/Trace.h>
#include "FastCapture.h"
namespace android {
/*static*/ const FastCaptureState FastCapture::sInitial;
FastCapture::FastCapture() : FastThread("cycleC_ms", "loadC_us"),
mInputSource(NULL), mInputSourceGen(0), mPipeSink(NULL), mPipeSinkGen(0),
mReadBuffer(NULL), mReadBufferState(-1), mFormat(Format_Invalid), mSampleRate(0),
// mDummyDumpState
mTotalNativeFramesRead(0)
{
mPrevious = &sInitial;
mCurrent = &sInitial;
mDummyDumpState = &mDummyFastCaptureDumpState;
}
FastCapture::~FastCapture()
{
}
FastCaptureStateQueue* FastCapture::sq()
{
return &mSQ;
}
const FastThreadState *FastCapture::poll()
{
return mSQ.poll();
}
void FastCapture::setNBLogWriter(NBLog::Writer *logWriter __unused)
{
}
void FastCapture::onIdle()
{
mPreIdle = *(const FastCaptureState *)mCurrent;
mCurrent = &mPreIdle;
}
void FastCapture::onExit()
{
free(mReadBuffer);
}
bool FastCapture::isSubClassCommand(FastThreadState::Command command)
{
switch ((FastCaptureState::Command) command) {
case FastCaptureState::READ:
case FastCaptureState::WRITE:
case FastCaptureState::READ_WRITE:
return true;
default:
return false;
}
}
void FastCapture::onStateChange()
{
const FastCaptureState * const current = (const FastCaptureState *) mCurrent;
const FastCaptureState * const previous = (const FastCaptureState *) mPrevious;
FastCaptureDumpState * const dumpState = (FastCaptureDumpState *) mDumpState;
const size_t frameCount = current->mFrameCount;
bool eitherChanged = false;
// check for change in input HAL configuration
NBAIO_Format previousFormat = mFormat;
if (current->mInputSourceGen != mInputSourceGen) {
mInputSource = current->mInputSource;
mInputSourceGen = current->mInputSourceGen;
if (mInputSource == NULL) {
mFormat = Format_Invalid;
mSampleRate = 0;
} else {
mFormat = mInputSource->format();
mSampleRate = Format_sampleRate(mFormat);
#if !LOG_NDEBUG
unsigned channelCount = Format_channelCount(mFormat);
ALOG_ASSERT(channelCount >= 1 && channelCount <= FCC_LIMIT);
#endif
}
dumpState->mSampleRate = mSampleRate;
eitherChanged = true;
}
// check for change in pipe
if (current->mPipeSinkGen != mPipeSinkGen) {
mPipeSink = current->mPipeSink;
mPipeSinkGen = current->mPipeSinkGen;
eitherChanged = true;
}
// input source and pipe sink must be compatible
if (eitherChanged && mInputSource != NULL && mPipeSink != NULL) {
ALOG_ASSERT(Format_isEqual(mFormat, mPipeSink->format()));
}
if ((!Format_isEqual(mFormat, previousFormat)) || (frameCount != previous->mFrameCount)) {
// FIXME to avoid priority inversion, don't free here
free(mReadBuffer);
mReadBuffer = NULL;
if (frameCount > 0 && mSampleRate > 0) {
// FIXME new may block for unbounded time at internal mutex of the heap
// implementation; it would be better to have normal capture thread allocate for
// us to avoid blocking here and to prevent possible priority inversion
size_t bufferSize = frameCount * Format_frameSize(mFormat);
(void)posix_memalign(&mReadBuffer, 32, bufferSize);
memset(mReadBuffer, 0, bufferSize); // if posix_memalign fails, will segv here.
mPeriodNs = (frameCount * 1000000000LL) / mSampleRate; // 1.00
mUnderrunNs = (frameCount * 1750000000LL) / mSampleRate; // 1.75
mOverrunNs = (frameCount * 500000000LL) / mSampleRate; // 0.50
mForceNs = (frameCount * 950000000LL) / mSampleRate; // 0.95
mWarmupNsMin = (frameCount * 750000000LL) / mSampleRate; // 0.75
mWarmupNsMax = (frameCount * 1250000000LL) / mSampleRate; // 1.25
} else {
mPeriodNs = 0;
mUnderrunNs = 0;
mOverrunNs = 0;
mForceNs = 0;
mWarmupNsMin = 0;
mWarmupNsMax = LONG_MAX;
}
mReadBufferState = -1;
dumpState->mFrameCount = frameCount;
}
dumpState->mSilenced = current->mSilenceCapture;
}
void FastCapture::onWork()
{
const FastCaptureState * const current = (const FastCaptureState *) mCurrent;
FastCaptureDumpState * const dumpState = (FastCaptureDumpState *) mDumpState;
const FastCaptureState::Command command = mCommand;
size_t frameCount = current->mFrameCount;
AudioBufferProvider* fastPatchRecordBufferProvider = current->mFastPatchRecordBufferProvider;
AudioBufferProvider::Buffer patchBuffer;
if (fastPatchRecordBufferProvider != 0) {
patchBuffer.frameCount = ~0;
status_t status = fastPatchRecordBufferProvider->getNextBuffer(&patchBuffer);
if (status != NO_ERROR) {
frameCount = 0;
} else if (patchBuffer.frameCount < frameCount) {
// TODO: Make sure that it doesn't cause any issues if we just get a small available
// buffer from the buffer provider.
frameCount = patchBuffer.frameCount;
}
}
if ((command & FastCaptureState::READ) /*&& isWarm*/) {
ALOG_ASSERT(mInputSource != NULL);
ALOG_ASSERT(mReadBuffer != NULL);
dumpState->mReadSequence++;
ATRACE_BEGIN("read");
ssize_t framesRead = mInputSource->read(mReadBuffer, frameCount);
ATRACE_END();
dumpState->mReadSequence++;
if (framesRead >= 0) {
LOG_ALWAYS_FATAL_IF((size_t) framesRead > frameCount);
mTotalNativeFramesRead += framesRead;
dumpState->mFramesRead = mTotalNativeFramesRead;
mReadBufferState = framesRead;
patchBuffer.frameCount = framesRead;
} else {
dumpState->mReadErrors++;
mReadBufferState = 0;
}
// FIXME rename to attemptedIO
mAttemptedWrite = true;
}
if (command & FastCaptureState::WRITE) {
ALOG_ASSERT(mPipeSink != NULL);
ALOG_ASSERT(mReadBuffer != NULL);
if (mReadBufferState < 0) {
memset(mReadBuffer, 0, frameCount * Format_frameSize(mFormat));
mReadBufferState = frameCount;
}
if (mReadBufferState > 0) {
if (current->mSilenceCapture) {
memset(mReadBuffer, 0, mReadBufferState * Format_frameSize(mFormat));
}
ssize_t framesWritten = mPipeSink->write(mReadBuffer, mReadBufferState);
audio_track_cblk_t* cblk = current->mCblk;
if (fastPatchRecordBufferProvider != 0) {
// This indicates the fast track is a patch record, update the cblk by
// calling releaseBuffer().
memcpy_by_audio_format(patchBuffer.raw, current->mFastPatchRecordFormat,
mReadBuffer, mFormat.mFormat, framesWritten * mFormat.mChannelCount);
patchBuffer.frameCount = framesWritten;
fastPatchRecordBufferProvider->releaseBuffer(&patchBuffer);
} else if (cblk != NULL && framesWritten > 0) {
// FIXME This supports at most one fast capture client.
// To handle multiple clients this could be converted to an array,
// or with a lot more work the control block could be shared by all clients.
int32_t rear = cblk->u.mStreaming.mRear;
android_atomic_release_store(framesWritten + rear, &cblk->u.mStreaming.mRear);
cblk->mServer += framesWritten;
int32_t old = android_atomic_or(CBLK_FUTEX_WAKE, &cblk->mFutex);
if (!(old & CBLK_FUTEX_WAKE)) {
// client is never in server process, so don't use FUTEX_WAKE_PRIVATE
(void) syscall(__NR_futex, &cblk->mFutex, FUTEX_WAKE, 1);
}
}
}
}
}
} // namespace android