diff options
Diffstat (limited to 'media/libmedia/Visualizer.cpp')
| -rw-r--r-- | media/libmedia/Visualizer.cpp | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/media/libmedia/Visualizer.cpp b/media/libmedia/Visualizer.cpp new file mode 100644 index 000000000000..39552b64a85c --- /dev/null +++ b/media/libmedia/Visualizer.cpp @@ -0,0 +1,319 @@ +/* +** +** 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 <media/Visualizer.h> + +extern void fixed_fft_real(int n, int32_t *v); + +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), + mCaptureCallBack(NULL), + mCaptureCbkUser(NULL) +{ + initCaptureSize(); +} + +Visualizer::~Visualizer() +{ +} + +status_t Visualizer::setEnabled(bool enabled) +{ + Mutex::Autolock _l(mLock); + + sp<CaptureThread> t = mCaptureThread; + if (t != 0) { + if (enabled) { + if (t->exitPending()) { + if (t->requestExitAndWait() == WOULD_BLOCK) { + LOGE("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("AudioTrackThread"); + } 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(mLock); + + 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)); + if (mCaptureThread == 0) { + LOGE("Could not create callback thread"); + return NO_INIT; + } + } + LOGV("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 || + AudioSystem::popCount(size) != 1) { + return BAD_VALUE; + } + + Mutex::Autolock _l(mLock); + 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 = VISU_PARAM_CAPTURE_SIZE; + *((int32_t *)p->data + 1)= size; + status_t status = setParameter(p); + + LOGV("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::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_t status = command(VISU_CMD_CAPTURE, 0, NULL, &replySize, waveform); + if (replySize == 0) { + status = NOT_ENOUGH_DATA; + } + } else { + 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_t 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) << 23; + workspace[i >> 1] |= (waveform[i + 1] ^ 0x80) << 7; + nonzero |= workspace[i >> 1]; + } + + if (nonzero) { + fixed_fft_real(mCaptureSize >> 1, workspace); + } + + for (uint32_t i = 0; i < mCaptureSize; i += 2) { + fft[i] = workspace[i >> 1] >> 23; + fft[i + 1] = workspace[i >> 1] >> 7; + } + + return NO_ERROR; +} + +void Visualizer::periodicCapture() +{ + Mutex::Autolock _l(mLock); + LOGV("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 = VISU_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; + + LOGV("initCaptureSize size %d status %d", mCaptureSize, status); + + return size; +} + +//------------------------------------------------------------------------- + +Visualizer::CaptureThread::CaptureThread(Visualizer& receiver, uint32_t captureRate, bool bCanCallJava) + : Thread(bCanCallJava), mReceiver(receiver) +{ + mSleepTimeUs = 1000000000 / captureRate; + LOGV("CaptureThread cstor %p captureRate %d mSleepTimeUs %d", this, captureRate, mSleepTimeUs); +} + +bool Visualizer::CaptureThread::threadLoop() +{ + LOGV("CaptureThread %p enter", this); + while (!exitPending()) + { + usleep(mSleepTimeUs); + mReceiver.periodicCapture(); + } + LOGV("CaptureThread %p exiting", this); + return false; +} + +status_t Visualizer::CaptureThread::readyToRun() +{ + return NO_ERROR; +} + +void Visualizer::CaptureThread::onFirstRef() +{ +} + +}; // namespace android + |