| /* |
| * Copyright (C) 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_TAG "EffectVisualizer" |
| //#define LOG_NDEBUG 0 |
| |
| #include <assert.h> |
| #include <inttypes.h> |
| #include <math.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| |
| #include <algorithm> // max |
| #include <new> |
| |
| #include <log/log.h> |
| |
| #include <audio_effects/effect_visualizer.h> |
| #include <audio_utils/primitives.h> |
| |
| #ifdef BUILD_FLOAT |
| |
| static constexpr audio_format_t kProcessFormat = AUDIO_FORMAT_PCM_FLOAT; |
| |
| #else |
| |
| static constexpr audio_format_t kProcessFormat = AUDIO_FORMAT_PCM_16_BIT; |
| |
| #endif // BUILD_FLOAT |
| |
| extern "C" { |
| |
| // effect_handle_t interface implementation for visualizer effect |
| extern const struct effect_interface_s gVisualizerInterface; |
| |
| // Google Visualizer UUID: d069d9e0-8329-11df-9168-0002a5d5c51b |
| const effect_descriptor_t gVisualizerDescriptor = { |
| {0xe46b26a0, 0xdddd, 0x11db, 0x8afd, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b}}, // type |
| {0xd069d9e0, 0x8329, 0x11df, 0x9168, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b}}, // uuid |
| EFFECT_CONTROL_API_VERSION, |
| (EFFECT_FLAG_TYPE_INSERT | EFFECT_FLAG_INSERT_FIRST), |
| 0, // TODO |
| 1, |
| "Visualizer", |
| "The Android Open Source Project", |
| }; |
| |
| enum visualizer_state_e { |
| VISUALIZER_STATE_UNINITIALIZED, |
| VISUALIZER_STATE_INITIALIZED, |
| VISUALIZER_STATE_ACTIVE, |
| }; |
| |
| // maximum time since last capture buffer update before resetting capture buffer. This means |
| // that the framework has stopped playing audio and we must start returning silence |
| #define MAX_STALL_TIME_MS 1000 |
| |
| #define CAPTURE_BUF_SIZE 65536 // "64k should be enough for everyone" |
| |
| #define DISCARD_MEASUREMENTS_TIME_MS 2000 // discard measurements older than this number of ms |
| |
| #define MAX_LATENCY_MS 3000 // 3 seconds of latency for audio pipeline |
| |
| // maximum number of buffers for which we keep track of the measurements |
| #define MEASUREMENT_WINDOW_MAX_SIZE_IN_BUFFERS 25 // note: buffer index is stored in uint8_t |
| |
| |
| struct BufferStats { |
| bool mIsValid; |
| uint16_t mPeakU16; // the positive peak of the absolute value of the samples in a buffer |
| float mRmsSquared; // the average square of the samples in a buffer |
| }; |
| |
| struct VisualizerContext { |
| const struct effect_interface_s *mItfe; |
| effect_config_t mConfig; |
| uint32_t mCaptureIdx; |
| uint32_t mCaptureSize; |
| uint32_t mScalingMode; |
| uint8_t mState; |
| uint32_t mLastCaptureIdx; |
| uint32_t mLatency; |
| struct timespec mBufferUpdateTime; |
| uint8_t mCaptureBuf[CAPTURE_BUF_SIZE]; |
| // for measurements |
| uint8_t mChannelCount; // to avoid recomputing it every time a buffer is processed |
| uint32_t mMeasurementMode; |
| uint8_t mMeasurementWindowSizeInBuffers; |
| uint8_t mMeasurementBufferIdx; |
| BufferStats mPastMeasurements[MEASUREMENT_WINDOW_MAX_SIZE_IN_BUFFERS]; |
| }; |
| |
| // |
| //--- Local functions |
| // |
| uint32_t Visualizer_getDeltaTimeMsFromUpdatedTime(VisualizerContext* pContext) { |
| uint32_t deltaMs = 0; |
| if (pContext->mBufferUpdateTime.tv_sec != 0) { |
| struct timespec ts; |
| if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) { |
| time_t secs = ts.tv_sec - pContext->mBufferUpdateTime.tv_sec; |
| long nsec = ts.tv_nsec - pContext->mBufferUpdateTime.tv_nsec; |
| if (nsec < 0) { |
| --secs; |
| nsec += 1000000000; |
| } |
| deltaMs = secs * 1000 + nsec / 1000000; |
| } |
| } |
| return deltaMs; |
| } |
| |
| |
| void Visualizer_reset(VisualizerContext *pContext) |
| { |
| pContext->mCaptureIdx = 0; |
| pContext->mLastCaptureIdx = 0; |
| pContext->mBufferUpdateTime.tv_sec = 0; |
| pContext->mLatency = 0; |
| memset(pContext->mCaptureBuf, 0x80, CAPTURE_BUF_SIZE); |
| } |
| |
| //---------------------------------------------------------------------------- |
| // Visualizer_setConfig() |
| //---------------------------------------------------------------------------- |
| // Purpose: Set input and output audio configuration. |
| // |
| // Inputs: |
| // pContext: effect engine context |
| // pConfig: pointer to effect_config_t structure holding input and output |
| // configuration parameters |
| // |
| // Outputs: |
| // |
| //---------------------------------------------------------------------------- |
| |
| int Visualizer_setConfig(VisualizerContext *pContext, effect_config_t *pConfig) |
| { |
| ALOGV("Visualizer_setConfig start"); |
| |
| if (pConfig->inputCfg.samplingRate != pConfig->outputCfg.samplingRate) return -EINVAL; |
| if (pConfig->inputCfg.channels != pConfig->outputCfg.channels) return -EINVAL; |
| if (pConfig->inputCfg.format != pConfig->outputCfg.format) return -EINVAL; |
| const uint32_t channelCount = audio_channel_count_from_out_mask(pConfig->inputCfg.channels); |
| #ifdef SUPPORT_MC |
| if (channelCount < 1 || channelCount > FCC_8) return -EINVAL; |
| #else |
| if (channelCount != FCC_2) return -EINVAL; |
| #endif |
| if (pConfig->outputCfg.accessMode != EFFECT_BUFFER_ACCESS_WRITE && |
| pConfig->outputCfg.accessMode != EFFECT_BUFFER_ACCESS_ACCUMULATE) return -EINVAL; |
| if (pConfig->inputCfg.format != kProcessFormat) return -EINVAL; |
| |
| pContext->mConfig = *pConfig; |
| |
| Visualizer_reset(pContext); |
| |
| return 0; |
| } |
| |
| |
| //---------------------------------------------------------------------------- |
| // Visualizer_getConfig() |
| //---------------------------------------------------------------------------- |
| // Purpose: Get input and output audio configuration. |
| // |
| // Inputs: |
| // pContext: effect engine context |
| // pConfig: pointer to effect_config_t structure holding input and output |
| // configuration parameters |
| // |
| // Outputs: |
| // |
| //---------------------------------------------------------------------------- |
| |
| void Visualizer_getConfig(VisualizerContext *pContext, effect_config_t *pConfig) |
| { |
| *pConfig = pContext->mConfig; |
| } |
| |
| |
| //---------------------------------------------------------------------------- |
| // Visualizer_init() |
| //---------------------------------------------------------------------------- |
| // Purpose: Initialize engine with default configuration. |
| // |
| // Inputs: |
| // pContext: effect engine context |
| // |
| // Outputs: |
| // |
| //---------------------------------------------------------------------------- |
| |
| int Visualizer_init(VisualizerContext *pContext) |
| { |
| pContext->mConfig.inputCfg.accessMode = EFFECT_BUFFER_ACCESS_READ; |
| pContext->mConfig.inputCfg.channels = AUDIO_CHANNEL_OUT_STEREO; |
| pContext->mConfig.inputCfg.format = kProcessFormat; |
| pContext->mConfig.inputCfg.samplingRate = 44100; |
| pContext->mConfig.inputCfg.bufferProvider.getBuffer = NULL; |
| pContext->mConfig.inputCfg.bufferProvider.releaseBuffer = NULL; |
| pContext->mConfig.inputCfg.bufferProvider.cookie = NULL; |
| pContext->mConfig.inputCfg.mask = EFFECT_CONFIG_ALL; |
| pContext->mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_ACCUMULATE; |
| pContext->mConfig.outputCfg.channels = AUDIO_CHANNEL_OUT_STEREO; |
| pContext->mConfig.outputCfg.format = kProcessFormat; |
| pContext->mConfig.outputCfg.samplingRate = 44100; |
| pContext->mConfig.outputCfg.bufferProvider.getBuffer = NULL; |
| pContext->mConfig.outputCfg.bufferProvider.releaseBuffer = NULL; |
| pContext->mConfig.outputCfg.bufferProvider.cookie = NULL; |
| pContext->mConfig.outputCfg.mask = EFFECT_CONFIG_ALL; |
| |
| // visualization initialization |
| pContext->mCaptureSize = VISUALIZER_CAPTURE_SIZE_MAX; |
| pContext->mScalingMode = VISUALIZER_SCALING_MODE_NORMALIZED; |
| |
| // measurement initialization |
| pContext->mChannelCount = |
| audio_channel_count_from_out_mask(pContext->mConfig.inputCfg.channels); |
| pContext->mMeasurementMode = MEASUREMENT_MODE_NONE; |
| pContext->mMeasurementWindowSizeInBuffers = MEASUREMENT_WINDOW_MAX_SIZE_IN_BUFFERS; |
| pContext->mMeasurementBufferIdx = 0; |
| for (uint32_t i=0 ; i<pContext->mMeasurementWindowSizeInBuffers ; i++) { |
| pContext->mPastMeasurements[i].mIsValid = false; |
| pContext->mPastMeasurements[i].mPeakU16 = 0; |
| pContext->mPastMeasurements[i].mRmsSquared = 0; |
| } |
| |
| Visualizer_setConfig(pContext, &pContext->mConfig); |
| |
| return 0; |
| } |
| |
| // |
| //--- Effect Library Interface Implementation |
| // |
| |
| int VisualizerLib_Create(const effect_uuid_t *uuid, |
| int32_t /*sessionId*/, |
| int32_t /*ioId*/, |
| effect_handle_t *pHandle) { |
| int ret; |
| |
| if (pHandle == NULL || uuid == NULL) { |
| return -EINVAL; |
| } |
| |
| if (memcmp(uuid, &gVisualizerDescriptor.uuid, sizeof(effect_uuid_t)) != 0) { |
| return -EINVAL; |
| } |
| |
| VisualizerContext *pContext = new VisualizerContext; |
| |
| pContext->mItfe = &gVisualizerInterface; |
| pContext->mState = VISUALIZER_STATE_UNINITIALIZED; |
| |
| ret = Visualizer_init(pContext); |
| if (ret < 0) { |
| ALOGW("VisualizerLib_Create() init failed"); |
| delete pContext; |
| return ret; |
| } |
| |
| *pHandle = (effect_handle_t)pContext; |
| |
| pContext->mState = VISUALIZER_STATE_INITIALIZED; |
| |
| ALOGV("VisualizerLib_Create %p", pContext); |
| |
| return 0; |
| |
| } |
| |
| int VisualizerLib_Release(effect_handle_t handle) { |
| VisualizerContext * pContext = (VisualizerContext *)handle; |
| |
| ALOGV("VisualizerLib_Release %p", handle); |
| if (pContext == NULL) { |
| return -EINVAL; |
| } |
| pContext->mState = VISUALIZER_STATE_UNINITIALIZED; |
| delete pContext; |
| |
| return 0; |
| } |
| |
| int VisualizerLib_GetDescriptor(const effect_uuid_t *uuid, |
| effect_descriptor_t *pDescriptor) { |
| |
| if (pDescriptor == NULL || uuid == NULL){ |
| ALOGV("VisualizerLib_GetDescriptor() called with NULL pointer"); |
| return -EINVAL; |
| } |
| |
| if (memcmp(uuid, &gVisualizerDescriptor.uuid, sizeof(effect_uuid_t)) == 0) { |
| *pDescriptor = gVisualizerDescriptor; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } /* end VisualizerLib_GetDescriptor */ |
| |
| // |
| //--- Effect Control Interface Implementation |
| // |
| |
| int Visualizer_process( |
| effect_handle_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer) |
| { |
| VisualizerContext * pContext = (VisualizerContext *)self; |
| |
| if (pContext == NULL) { |
| return -EINVAL; |
| } |
| |
| if (inBuffer == NULL || inBuffer->raw == NULL || |
| outBuffer == NULL || outBuffer->raw == NULL || |
| inBuffer->frameCount != outBuffer->frameCount || |
| inBuffer->frameCount == 0) { |
| return -EINVAL; |
| } |
| |
| const size_t sampleLen = inBuffer->frameCount * pContext->mChannelCount; |
| |
| // perform measurements if needed |
| if (pContext->mMeasurementMode & MEASUREMENT_MODE_PEAK_RMS) { |
| // find the peak and RMS squared for the new buffer |
| float rmsSqAcc = 0; |
| |
| #ifdef BUILD_FLOAT |
| float maxSample = 0.f; |
| for (size_t inIdx = 0; inIdx < sampleLen; ++inIdx) { |
| maxSample = fmax(maxSample, fabs(inBuffer->f32[inIdx])); |
| rmsSqAcc += inBuffer->f32[inIdx] * inBuffer->f32[inIdx]; |
| } |
| maxSample *= 1 << 15; // scale to int16_t, with exactly 1 << 15 representing positive num. |
| rmsSqAcc *= 1 << 30; // scale to int16_t * 2 |
| #else |
| int maxSample = 0; |
| for (size_t inIdx = 0; inIdx < sampleLen; ++inIdx) { |
| maxSample = std::max(maxSample, std::abs(int32_t(inBuffer->s16[inIdx]))); |
| rmsSqAcc += inBuffer->s16[inIdx] * inBuffer->s16[inIdx]; |
| } |
| #endif |
| // store the measurement |
| pContext->mPastMeasurements[pContext->mMeasurementBufferIdx].mPeakU16 = (uint16_t)maxSample; |
| pContext->mPastMeasurements[pContext->mMeasurementBufferIdx].mRmsSquared = |
| rmsSqAcc / sampleLen; |
| pContext->mPastMeasurements[pContext->mMeasurementBufferIdx].mIsValid = true; |
| if (++pContext->mMeasurementBufferIdx >= pContext->mMeasurementWindowSizeInBuffers) { |
| pContext->mMeasurementBufferIdx = 0; |
| } |
| } |
| |
| #ifdef BUILD_FLOAT |
| float fscale; // multiplicative scale |
| #else |
| int32_t shift; |
| #endif // BUILD_FLOAT |
| |
| if (pContext->mScalingMode == VISUALIZER_SCALING_MODE_NORMALIZED) { |
| // derive capture scaling factor from peak value in current buffer |
| // this gives more interesting captures for display. |
| |
| #ifdef BUILD_FLOAT |
| float maxSample = 0.f; |
| for (size_t inIdx = 0; inIdx < sampleLen; ) { |
| // we reconstruct the actual summed value to ensure proper normalization |
| // for multichannel outputs (channels > 2 may often be 0). |
| float smp = 0.f; |
| for (int i = 0; i < pContext->mChannelCount; ++i) { |
| smp += inBuffer->f32[inIdx++]; |
| } |
| maxSample = fmax(maxSample, fabs(smp)); |
| } |
| if (maxSample > 0.f) { |
| fscale = 0.99f / maxSample; |
| int exp; // unused |
| const float significand = frexp(fscale, &exp); |
| if (significand == 0.5f) { |
| fscale *= 255.f / 256.f; // avoid returning unaltered PCM signal |
| } |
| } else { |
| // scale doesn't matter, the values are all 0. |
| fscale = 1.f; |
| } |
| #else |
| int32_t orAccum = 0; |
| for (size_t i = 0; i < sampleLen; ++i) { |
| int32_t smp = inBuffer->s16[i]; |
| if (smp < 0) smp = -smp - 1; // take care to keep the max negative in range |
| orAccum |= smp; |
| } |
| |
| // A maximum amplitude signal will have 17 leading zeros, which we want to |
| // translate to a shift of 8 (for converting 16 bit to 8 bit) |
| shift = 25 - __builtin_clz(orAccum); |
| |
| // Never scale by less than 8 to avoid returning unaltered PCM signal. |
| if (shift < 3) { |
| shift = 3; |
| } |
| // add one to combine the division by 2 needed after summing left and right channels below |
| shift++; |
| #endif // BUILD_FLOAT |
| } else { |
| assert(pContext->mScalingMode == VISUALIZER_SCALING_MODE_AS_PLAYED); |
| #ifdef BUILD_FLOAT |
| // Note: if channels are uncorrelated, 1/sqrt(N) could be used at the risk of clipping. |
| fscale = 1.f / pContext->mChannelCount; // account for summing all the channels together. |
| #else |
| shift = 9; |
| #endif // BUILD_FLOAT |
| } |
| |
| uint32_t captIdx; |
| uint32_t inIdx; |
| uint8_t *buf = pContext->mCaptureBuf; |
| for (inIdx = 0, captIdx = pContext->mCaptureIdx; |
| inIdx < sampleLen; |
| captIdx++) { |
| if (captIdx >= CAPTURE_BUF_SIZE) captIdx = 0; // wrap |
| |
| #ifdef BUILD_FLOAT |
| float smp = 0.f; |
| for (uint32_t i = 0; i < pContext->mChannelCount; ++i) { |
| smp += inBuffer->f32[inIdx++]; |
| } |
| buf[captIdx] = clamp8_from_float(smp * fscale); |
| #else |
| const int32_t smp = (inBuffer->s16[inIdx] + inBuffer->s16[inIdx + 1]) >> shift; |
| inIdx += FCC_2; // integer supports stereo only. |
| buf[captIdx] = ((uint8_t)smp)^0x80; |
| #endif // BUILD_FLOAT |
| } |
| |
| // XXX the following two should really be atomic, though it probably doesn't |
| // matter much for visualization purposes |
| pContext->mCaptureIdx = captIdx; |
| // update last buffer update time stamp |
| if (clock_gettime(CLOCK_MONOTONIC, &pContext->mBufferUpdateTime) < 0) { |
| pContext->mBufferUpdateTime.tv_sec = 0; |
| } |
| |
| if (inBuffer->raw != outBuffer->raw) { |
| #ifdef BUILD_FLOAT |
| if (pContext->mConfig.outputCfg.accessMode == EFFECT_BUFFER_ACCESS_ACCUMULATE) { |
| for (size_t i = 0; i < sampleLen; ++i) { |
| outBuffer->f32[i] += inBuffer->f32[i]; |
| } |
| } else { |
| memcpy(outBuffer->raw, inBuffer->raw, sampleLen * sizeof(float)); |
| } |
| #else |
| if (pContext->mConfig.outputCfg.accessMode == EFFECT_BUFFER_ACCESS_ACCUMULATE) { |
| for (size_t i = 0; i < outBuffer->frameCount*2; i++) { |
| outBuffer->s16[i] = clamp16(outBuffer->s16[i] + inBuffer->s16[i]); |
| } |
| } else { |
| memcpy(outBuffer->raw, inBuffer->raw, outBuffer->frameCount * 2 * sizeof(int16_t)); |
| } |
| #endif // BUILD_FLOAT |
| } |
| if (pContext->mState != VISUALIZER_STATE_ACTIVE) { |
| return -ENODATA; |
| } |
| return 0; |
| } // end Visualizer_process |
| |
| int Visualizer_command(effect_handle_t self, uint32_t cmdCode, uint32_t cmdSize, |
| void *pCmdData, uint32_t *replySize, void *pReplyData) { |
| |
| VisualizerContext * pContext = (VisualizerContext *)self; |
| |
| if (pContext == NULL || pContext->mState == VISUALIZER_STATE_UNINITIALIZED) { |
| return -EINVAL; |
| } |
| |
| // ALOGV("Visualizer_command command %" PRIu32 " cmdSize %" PRIu32, cmdCode, cmdSize); |
| |
| switch (cmdCode) { |
| case EFFECT_CMD_INIT: |
| if (pReplyData == NULL || replySize == NULL || *replySize != sizeof(int)) { |
| return -EINVAL; |
| } |
| *(int *) pReplyData = Visualizer_init(pContext); |
| break; |
| case EFFECT_CMD_SET_CONFIG: |
| if (pCmdData == NULL || cmdSize != sizeof(effect_config_t) |
| || pReplyData == NULL || replySize == NULL || *replySize != sizeof(int)) { |
| return -EINVAL; |
| } |
| *(int *) pReplyData = Visualizer_setConfig(pContext, |
| (effect_config_t *) pCmdData); |
| break; |
| case EFFECT_CMD_GET_CONFIG: |
| if (pReplyData == NULL || replySize == NULL || |
| *replySize != sizeof(effect_config_t)) { |
| return -EINVAL; |
| } |
| Visualizer_getConfig(pContext, (effect_config_t *)pReplyData); |
| break; |
| case EFFECT_CMD_RESET: |
| Visualizer_reset(pContext); |
| break; |
| case EFFECT_CMD_ENABLE: |
| if (pReplyData == NULL || replySize == NULL || *replySize != sizeof(int)) { |
| return -EINVAL; |
| } |
| if (pContext->mState != VISUALIZER_STATE_INITIALIZED) { |
| return -ENOSYS; |
| } |
| pContext->mState = VISUALIZER_STATE_ACTIVE; |
| ALOGV("EFFECT_CMD_ENABLE() OK"); |
| *(int *)pReplyData = 0; |
| break; |
| case EFFECT_CMD_DISABLE: |
| if (pReplyData == NULL || replySize == NULL || *replySize != sizeof(int)) { |
| return -EINVAL; |
| } |
| if (pContext->mState != VISUALIZER_STATE_ACTIVE) { |
| return -ENOSYS; |
| } |
| pContext->mState = VISUALIZER_STATE_INITIALIZED; |
| ALOGV("EFFECT_CMD_DISABLE() OK"); |
| *(int *)pReplyData = 0; |
| break; |
| case EFFECT_CMD_GET_PARAM: { |
| if (pCmdData == NULL || |
| cmdSize != (int)(sizeof(effect_param_t) + sizeof(uint32_t)) || |
| pReplyData == NULL || replySize == NULL || |
| *replySize < (int)(sizeof(effect_param_t) + sizeof(uint32_t) + sizeof(uint32_t))) { |
| return -EINVAL; |
| } |
| memcpy(pReplyData, pCmdData, sizeof(effect_param_t) + sizeof(uint32_t)); |
| effect_param_t *p = (effect_param_t *)pReplyData; |
| p->status = 0; |
| *replySize = sizeof(effect_param_t) + sizeof(uint32_t); |
| if (p->psize != sizeof(uint32_t)) { |
| p->status = -EINVAL; |
| break; |
| } |
| switch (*(uint32_t *)p->data) { |
| case VISUALIZER_PARAM_CAPTURE_SIZE: |
| ALOGV("get mCaptureSize = %" PRIu32, pContext->mCaptureSize); |
| *((uint32_t *)p->data + 1) = pContext->mCaptureSize; |
| p->vsize = sizeof(uint32_t); |
| *replySize += sizeof(uint32_t); |
| break; |
| case VISUALIZER_PARAM_SCALING_MODE: |
| ALOGV("get mScalingMode = %" PRIu32, pContext->mScalingMode); |
| *((uint32_t *)p->data + 1) = pContext->mScalingMode; |
| p->vsize = sizeof(uint32_t); |
| *replySize += sizeof(uint32_t); |
| break; |
| case VISUALIZER_PARAM_MEASUREMENT_MODE: |
| ALOGV("get mMeasurementMode = %" PRIu32, pContext->mMeasurementMode); |
| *((uint32_t *)p->data + 1) = pContext->mMeasurementMode; |
| p->vsize = sizeof(uint32_t); |
| *replySize += sizeof(uint32_t); |
| break; |
| default: |
| p->status = -EINVAL; |
| } |
| } break; |
| case EFFECT_CMD_SET_PARAM: { |
| if (pCmdData == NULL || |
| cmdSize != (int)(sizeof(effect_param_t) + sizeof(uint32_t) + sizeof(uint32_t)) || |
| pReplyData == NULL || replySize == NULL || *replySize != sizeof(int32_t)) { |
| return -EINVAL; |
| } |
| *(int32_t *)pReplyData = 0; |
| effect_param_t *p = (effect_param_t *)pCmdData; |
| if (p->psize != sizeof(uint32_t) || p->vsize != sizeof(uint32_t)) { |
| *(int32_t *)pReplyData = -EINVAL; |
| break; |
| } |
| switch (*(uint32_t *)p->data) { |
| case VISUALIZER_PARAM_CAPTURE_SIZE: { |
| const uint32_t captureSize = *((uint32_t *)p->data + 1); |
| if (captureSize > VISUALIZER_CAPTURE_SIZE_MAX) { |
| android_errorWriteLog(0x534e4554, "31781965"); |
| *(int32_t *)pReplyData = -EINVAL; |
| ALOGW("set mCaptureSize = %u > %u", captureSize, VISUALIZER_CAPTURE_SIZE_MAX); |
| } else { |
| pContext->mCaptureSize = captureSize; |
| ALOGV("set mCaptureSize = %u", captureSize); |
| } |
| } break; |
| case VISUALIZER_PARAM_SCALING_MODE: |
| pContext->mScalingMode = *((uint32_t *)p->data + 1); |
| ALOGV("set mScalingMode = %" PRIu32, pContext->mScalingMode); |
| break; |
| case VISUALIZER_PARAM_LATENCY: { |
| uint32_t latency = *((uint32_t *)p->data + 1); |
| if (latency > MAX_LATENCY_MS) { |
| latency = MAX_LATENCY_MS; // clamp latency b/31781965 |
| } |
| pContext->mLatency = latency; |
| ALOGV("set mLatency = %u", latency); |
| } break; |
| case VISUALIZER_PARAM_MEASUREMENT_MODE: |
| pContext->mMeasurementMode = *((uint32_t *)p->data + 1); |
| ALOGV("set mMeasurementMode = %" PRIu32, pContext->mMeasurementMode); |
| break; |
| default: |
| *(int32_t *)pReplyData = -EINVAL; |
| } |
| } break; |
| case EFFECT_CMD_SET_DEVICE: |
| case EFFECT_CMD_SET_VOLUME: |
| case EFFECT_CMD_SET_AUDIO_MODE: |
| break; |
| |
| |
| case VISUALIZER_CMD_CAPTURE: { |
| uint32_t captureSize = pContext->mCaptureSize; |
| if (pReplyData == NULL || replySize == NULL || *replySize != captureSize) { |
| ALOGV("VISUALIZER_CMD_CAPTURE() error *replySize %" PRIu32 " captureSize %" PRIu32, |
| *replySize, captureSize); |
| return -EINVAL; |
| } |
| if (pContext->mState == VISUALIZER_STATE_ACTIVE) { |
| const uint32_t deltaMs = Visualizer_getDeltaTimeMsFromUpdatedTime(pContext); |
| |
| // if audio framework has stopped playing audio although the effect is still |
| // active we must clear the capture buffer to return silence |
| if ((pContext->mLastCaptureIdx == pContext->mCaptureIdx) && |
| (pContext->mBufferUpdateTime.tv_sec != 0) && |
| (deltaMs > MAX_STALL_TIME_MS)) { |
| ALOGV("capture going to idle"); |
| pContext->mBufferUpdateTime.tv_sec = 0; |
| memset(pReplyData, 0x80, captureSize); |
| } else { |
| int32_t latencyMs = pContext->mLatency; |
| latencyMs -= deltaMs; |
| if (latencyMs < 0) { |
| latencyMs = 0; |
| } |
| uint32_t deltaSmpl = captureSize |
| + pContext->mConfig.inputCfg.samplingRate * latencyMs / 1000; |
| |
| // large sample rate, latency, or capture size, could cause overflow. |
| // do not offset more than the size of buffer. |
| if (deltaSmpl > CAPTURE_BUF_SIZE) { |
| android_errorWriteLog(0x534e4554, "31781965"); |
| deltaSmpl = CAPTURE_BUF_SIZE; |
| } |
| |
| int32_t capturePoint; |
| //capturePoint = (int32_t)pContext->mCaptureIdx - deltaSmpl; |
| __builtin_sub_overflow((int32_t)pContext->mCaptureIdx, deltaSmpl, &capturePoint); |
| // a negative capturePoint means we wrap the buffer. |
| if (capturePoint < 0) { |
| uint32_t size = -capturePoint; |
| if (size > captureSize) { |
| size = captureSize; |
| } |
| memcpy(pReplyData, |
| pContext->mCaptureBuf + CAPTURE_BUF_SIZE + capturePoint, |
| size); |
| pReplyData = (char *)pReplyData + size; |
| captureSize -= size; |
| capturePoint = 0; |
| } |
| memcpy(pReplyData, |
| pContext->mCaptureBuf + capturePoint, |
| captureSize); |
| } |
| |
| pContext->mLastCaptureIdx = pContext->mCaptureIdx; |
| } else { |
| memset(pReplyData, 0x80, captureSize); |
| } |
| |
| } break; |
| |
| case VISUALIZER_CMD_MEASURE: { |
| if (pReplyData == NULL || replySize == NULL || |
| *replySize < (sizeof(int32_t) * MEASUREMENT_COUNT)) { |
| if (replySize == NULL) { |
| ALOGV("VISUALIZER_CMD_MEASURE() error replySize NULL"); |
| } else { |
| ALOGV("VISUALIZER_CMD_MEASURE() error *replySize %" PRIu32 |
| " < (sizeof(int32_t) * MEASUREMENT_COUNT) %" PRIu32, |
| *replySize, |
| uint32_t(sizeof(int32_t)) * MEASUREMENT_COUNT); |
| } |
| android_errorWriteLog(0x534e4554, "30229821"); |
| return -EINVAL; |
| } |
| uint16_t peakU16 = 0; |
| float sumRmsSquared = 0.0f; |
| uint8_t nbValidMeasurements = 0; |
| // reset measurements if last measurement was too long ago (which implies stored |
| // measurements aren't relevant anymore and shouldn't bias the new one) |
| const int32_t delayMs = Visualizer_getDeltaTimeMsFromUpdatedTime(pContext); |
| if (delayMs > DISCARD_MEASUREMENTS_TIME_MS) { |
| ALOGV("Discarding measurements, last measurement is %" PRId32 "ms old", delayMs); |
| for (uint32_t i=0 ; i<pContext->mMeasurementWindowSizeInBuffers ; i++) { |
| pContext->mPastMeasurements[i].mIsValid = false; |
| pContext->mPastMeasurements[i].mPeakU16 = 0; |
| pContext->mPastMeasurements[i].mRmsSquared = 0; |
| } |
| pContext->mMeasurementBufferIdx = 0; |
| } else { |
| // only use actual measurements, otherwise the first RMS measure happening before |
| // MEASUREMENT_WINDOW_MAX_SIZE_IN_BUFFERS have been played will always be artificially |
| // low |
| for (uint32_t i=0 ; i < pContext->mMeasurementWindowSizeInBuffers ; i++) { |
| if (pContext->mPastMeasurements[i].mIsValid) { |
| if (pContext->mPastMeasurements[i].mPeakU16 > peakU16) { |
| peakU16 = pContext->mPastMeasurements[i].mPeakU16; |
| } |
| sumRmsSquared += pContext->mPastMeasurements[i].mRmsSquared; |
| nbValidMeasurements++; |
| } |
| } |
| } |
| float rms = nbValidMeasurements == 0 ? 0.0f : sqrtf(sumRmsSquared / nbValidMeasurements); |
| int32_t* pIntReplyData = (int32_t*)pReplyData; |
| // convert from I16 sample values to mB and write results |
| if (rms < 0.000016f) { |
| pIntReplyData[MEASUREMENT_IDX_RMS] = -9600; //-96dB |
| } else { |
| pIntReplyData[MEASUREMENT_IDX_RMS] = (int32_t) (2000 * log10(rms / 32767.0f)); |
| } |
| if (peakU16 == 0) { |
| pIntReplyData[MEASUREMENT_IDX_PEAK] = -9600; //-96dB |
| } else { |
| pIntReplyData[MEASUREMENT_IDX_PEAK] = (int32_t) (2000 * log10(peakU16 / 32767.0f)); |
| } |
| ALOGV("VISUALIZER_CMD_MEASURE peak=%" PRIu16 " (%" PRId32 "mB), rms=%.1f (%" PRId32 "mB)", |
| peakU16, pIntReplyData[MEASUREMENT_IDX_PEAK], |
| rms, pIntReplyData[MEASUREMENT_IDX_RMS]); |
| } |
| break; |
| |
| default: |
| ALOGW("Visualizer_command invalid command %" PRIu32, cmdCode); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* Effect Control Interface Implementation: get_descriptor */ |
| int Visualizer_getDescriptor(effect_handle_t self, |
| effect_descriptor_t *pDescriptor) |
| { |
| VisualizerContext * pContext = (VisualizerContext *) self; |
| |
| if (pContext == NULL || pDescriptor == NULL) { |
| ALOGV("Visualizer_getDescriptor() invalid param"); |
| return -EINVAL; |
| } |
| |
| *pDescriptor = gVisualizerDescriptor; |
| |
| return 0; |
| } /* end Visualizer_getDescriptor */ |
| |
| // effect_handle_t interface implementation for visualizer effect |
| const struct effect_interface_s gVisualizerInterface = { |
| Visualizer_process, |
| Visualizer_command, |
| Visualizer_getDescriptor, |
| NULL, |
| }; |
| |
| // This is the only symbol that needs to be exported |
| __attribute__ ((visibility ("default"))) |
| audio_effect_library_t AUDIO_EFFECT_LIBRARY_INFO_SYM = { |
| .tag = AUDIO_EFFECT_LIBRARY_TAG, |
| .version = EFFECT_LIBRARY_API_VERSION, |
| .name = "Visualizer Library", |
| .implementor = "The Android Open Source Project", |
| .create_effect = VisualizerLib_Create, |
| .release_effect = VisualizerLib_Release, |
| .get_descriptor = VisualizerLib_GetDescriptor, |
| }; |
| |
| }; // extern "C" |
