| /* |
| ** |
| ** Copyright 2010, 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_NDEBUG 0 |
| #define LOG_TAG "Visualizer" |
| #include <utils/Log.h> |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| #include <limits.h> |
| |
| #include <cutils/bitops.h> |
| |
| #include <media/Visualizer.h> |
| #include <audio_utils/fixedfft.h> |
| |
| namespace android { |
| |
| // --------------------------------------------------------------------------- |
| |
| Visualizer::Visualizer (int32_t priority, |
| effect_callback_t cbf, |
| void* user, |
| int sessionId) |
| : AudioEffect(SL_IID_VISUALIZATION, NULL, priority, cbf, user, sessionId), |
| mCaptureRate(CAPTURE_RATE_DEF), |
| mCaptureSize(CAPTURE_SIZE_DEF), |
| mSampleRate(44100000), |
| mScalingMode(VISUALIZER_SCALING_MODE_NORMALIZED), |
| mCaptureCallBack(NULL), |
| mCaptureCbkUser(NULL) |
| { |
| initCaptureSize(); |
| } |
| |
| Visualizer::~Visualizer() |
| { |
| } |
| |
| status_t Visualizer::setEnabled(bool enabled) |
| { |
| Mutex::Autolock _l(mCaptureLock); |
| |
| sp<CaptureThread> t = mCaptureThread; |
| if (t != 0) { |
| if (enabled) { |
| if (t->exitPending()) { |
| if (t->requestExitAndWait() == WOULD_BLOCK) { |
| ALOGE("Visualizer::enable() called from thread"); |
| return INVALID_OPERATION; |
| } |
| } |
| } |
| t->mLock.lock(); |
| } |
| |
| status_t status = AudioEffect::setEnabled(enabled); |
| |
| if (status == NO_ERROR) { |
| if (t != 0) { |
| if (enabled) { |
| t->run("Visualizer"); |
| } else { |
| t->requestExit(); |
| } |
| } |
| } |
| |
| if (t != 0) { |
| t->mLock.unlock(); |
| } |
| |
| return status; |
| } |
| |
| status_t Visualizer::setCaptureCallBack(capture_cbk_t cbk, void* user, uint32_t flags, |
| uint32_t rate) |
| { |
| if (rate > CAPTURE_RATE_MAX) { |
| return BAD_VALUE; |
| } |
| Mutex::Autolock _l(mCaptureLock); |
| |
| if (mEnabled) { |
| return INVALID_OPERATION; |
| } |
| |
| sp<CaptureThread> t = mCaptureThread; |
| if (t != 0) { |
| t->mLock.lock(); |
| } |
| mCaptureThread.clear(); |
| mCaptureCallBack = cbk; |
| mCaptureCbkUser = user; |
| mCaptureFlags = flags; |
| mCaptureRate = rate; |
| |
| if (t != 0) { |
| t->mLock.unlock(); |
| } |
| |
| if (cbk != NULL) { |
| mCaptureThread = new CaptureThread(*this, rate, ((flags & CAPTURE_CALL_JAVA) != 0)); |
| } |
| ALOGV("setCaptureCallBack() rate: %d thread %p flags 0x%08x", |
| rate, mCaptureThread.get(), mCaptureFlags); |
| return NO_ERROR; |
| } |
| |
| status_t Visualizer::setCaptureSize(uint32_t size) |
| { |
| if (size > VISUALIZER_CAPTURE_SIZE_MAX || |
| size < VISUALIZER_CAPTURE_SIZE_MIN || |
| popcount(size) != 1) { |
| return BAD_VALUE; |
| } |
| |
| Mutex::Autolock _l(mCaptureLock); |
| if (mEnabled) { |
| return INVALID_OPERATION; |
| } |
| |
| uint32_t buf32[sizeof(effect_param_t) / sizeof(uint32_t) + 2]; |
| effect_param_t *p = (effect_param_t *)buf32; |
| |
| p->psize = sizeof(uint32_t); |
| p->vsize = sizeof(uint32_t); |
| *(int32_t *)p->data = VISUALIZER_PARAM_CAPTURE_SIZE; |
| *((int32_t *)p->data + 1)= size; |
| status_t status = setParameter(p); |
| |
| ALOGV("setCaptureSize size %d status %d p->status %d", size, status, p->status); |
| |
| if (status == NO_ERROR) { |
| status = p->status; |
| if (status == NO_ERROR) { |
| mCaptureSize = size; |
| } |
| } |
| |
| return status; |
| } |
| |
| status_t Visualizer::setScalingMode(uint32_t mode) { |
| if ((mode != VISUALIZER_SCALING_MODE_NORMALIZED) |
| && (mode != VISUALIZER_SCALING_MODE_AS_PLAYED)) { |
| return BAD_VALUE; |
| } |
| |
| Mutex::Autolock _l(mCaptureLock); |
| |
| uint32_t buf32[sizeof(effect_param_t) / sizeof(uint32_t) + 2]; |
| effect_param_t *p = (effect_param_t *)buf32; |
| |
| p->psize = sizeof(uint32_t); |
| p->vsize = sizeof(uint32_t); |
| *(int32_t *)p->data = VISUALIZER_PARAM_SCALING_MODE; |
| *((int32_t *)p->data + 1)= mode; |
| status_t status = setParameter(p); |
| |
| ALOGV("setScalingMode mode %d status %d p->status %d", mode, status, p->status); |
| |
| if (status == NO_ERROR) { |
| status = p->status; |
| if (status == NO_ERROR) { |
| mScalingMode = mode; |
| } |
| } |
| |
| return status; |
| } |
| |
| status_t Visualizer::getWaveForm(uint8_t *waveform) |
| { |
| if (waveform == NULL) { |
| return BAD_VALUE; |
| } |
| if (mCaptureSize == 0) { |
| return NO_INIT; |
| } |
| |
| status_t status = NO_ERROR; |
| if (mEnabled) { |
| uint32_t replySize = mCaptureSize; |
| status = command(VISUALIZER_CMD_CAPTURE, 0, NULL, &replySize, waveform); |
| ALOGV("getWaveForm() command returned %d", status); |
| if ((status == NO_ERROR) && (replySize == 0)) { |
| status = NOT_ENOUGH_DATA; |
| } |
| } else { |
| ALOGV("getWaveForm() disabled"); |
| memset(waveform, 0x80, mCaptureSize); |
| } |
| return status; |
| } |
| |
| status_t Visualizer::getFft(uint8_t *fft) |
| { |
| if (fft == NULL) { |
| return BAD_VALUE; |
| } |
| if (mCaptureSize == 0) { |
| return NO_INIT; |
| } |
| |
| status_t status = NO_ERROR; |
| if (mEnabled) { |
| uint8_t buf[mCaptureSize]; |
| status = getWaveForm(buf); |
| if (status == NO_ERROR) { |
| status = doFft(fft, buf); |
| } |
| } else { |
| memset(fft, 0, mCaptureSize); |
| } |
| return status; |
| } |
| |
| status_t Visualizer::doFft(uint8_t *fft, uint8_t *waveform) |
| { |
| int32_t workspace[mCaptureSize >> 1]; |
| int32_t nonzero = 0; |
| |
| for (uint32_t i = 0; i < mCaptureSize; i += 2) { |
| workspace[i >> 1] = |
| ((waveform[i] ^ 0x80) << 24) | ((waveform[i + 1] ^ 0x80) << 8); |
| nonzero |= workspace[i >> 1]; |
| } |
| |
| if (nonzero) { |
| fixed_fft_real(mCaptureSize >> 1, workspace); |
| } |
| |
| for (uint32_t i = 0; i < mCaptureSize; i += 2) { |
| short tmp = workspace[i >> 1] >> 21; |
| while (tmp > 127 || tmp < -128) tmp >>= 1; |
| fft[i] = tmp; |
| tmp = workspace[i >> 1]; |
| tmp >>= 5; |
| while (tmp > 127 || tmp < -128) tmp >>= 1; |
| fft[i + 1] = tmp; |
| } |
| |
| return NO_ERROR; |
| } |
| |
| void Visualizer::periodicCapture() |
| { |
| Mutex::Autolock _l(mCaptureLock); |
| ALOGV("periodicCapture() %p mCaptureCallBack %p mCaptureFlags 0x%08x", |
| this, mCaptureCallBack, mCaptureFlags); |
| if (mCaptureCallBack != NULL && |
| (mCaptureFlags & (CAPTURE_WAVEFORM|CAPTURE_FFT)) && |
| mCaptureSize != 0) { |
| uint8_t waveform[mCaptureSize]; |
| status_t status = getWaveForm(waveform); |
| if (status != NO_ERROR) { |
| return; |
| } |
| uint8_t fft[mCaptureSize]; |
| if (mCaptureFlags & CAPTURE_FFT) { |
| status = doFft(fft, waveform); |
| } |
| if (status != NO_ERROR) { |
| return; |
| } |
| uint8_t *wavePtr = NULL; |
| uint8_t *fftPtr = NULL; |
| uint32_t waveSize = 0; |
| uint32_t fftSize = 0; |
| if (mCaptureFlags & CAPTURE_WAVEFORM) { |
| wavePtr = waveform; |
| waveSize = mCaptureSize; |
| } |
| if (mCaptureFlags & CAPTURE_FFT) { |
| fftPtr = fft; |
| fftSize = mCaptureSize; |
| } |
| mCaptureCallBack(mCaptureCbkUser, waveSize, wavePtr, fftSize, fftPtr, mSampleRate); |
| } |
| } |
| |
| uint32_t Visualizer::initCaptureSize() |
| { |
| uint32_t buf32[sizeof(effect_param_t) / sizeof(uint32_t) + 2]; |
| effect_param_t *p = (effect_param_t *)buf32; |
| |
| p->psize = sizeof(uint32_t); |
| p->vsize = sizeof(uint32_t); |
| *(int32_t *)p->data = VISUALIZER_PARAM_CAPTURE_SIZE; |
| status_t status = getParameter(p); |
| |
| if (status == NO_ERROR) { |
| status = p->status; |
| } |
| |
| uint32_t size = 0; |
| if (status == NO_ERROR) { |
| size = *((int32_t *)p->data + 1); |
| } |
| mCaptureSize = size; |
| |
| ALOGV("initCaptureSize size %d status %d", mCaptureSize, status); |
| |
| return size; |
| } |
| |
| void Visualizer::controlStatusChanged(bool controlGranted) { |
| if (controlGranted) { |
| // this Visualizer instance regained control of the effect, reset the scaling mode |
| // and capture size as has been cached through it. |
| ALOGV("controlStatusChanged(true) causes effect parameter reset:"); |
| ALOGV(" scaling mode reset to %d", mScalingMode); |
| setScalingMode(mScalingMode); |
| ALOGV(" capture size reset to %d", mCaptureSize); |
| setCaptureSize(mCaptureSize); |
| } |
| AudioEffect::controlStatusChanged(controlGranted); |
| } |
| |
| //------------------------------------------------------------------------- |
| |
| Visualizer::CaptureThread::CaptureThread(Visualizer& receiver, uint32_t captureRate, |
| bool bCanCallJava) |
| : Thread(bCanCallJava), mReceiver(receiver) |
| { |
| mSleepTimeUs = 1000000000 / captureRate; |
| ALOGV("CaptureThread cstor %p captureRate %d mSleepTimeUs %d", this, captureRate, mSleepTimeUs); |
| } |
| |
| bool Visualizer::CaptureThread::threadLoop() |
| { |
| ALOGV("CaptureThread %p enter", this); |
| while (!exitPending()) |
| { |
| usleep(mSleepTimeUs); |
| mReceiver.periodicCapture(); |
| } |
| ALOGV("CaptureThread %p exiting", this); |
| return false; |
| } |
| |
| }; // namespace android |
