diff --git a/media/libeffects/EffectEqualizer.cpp b/media/libeffects/EffectEqualizer.cpp
new file mode 100644
index 0000000..3a5da4d
--- /dev/null
+++ b/media/libeffects/EffectEqualizer.cpp
@@ -0,0 +1,605 @@
+/*
+ * Copyright (C) 2009 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 "Equalizer"
+#define ARRAY_SIZE(array) (sizeof array / sizeof array[0])
+//#define LOG_NDEBUG 0
+#include <cutils/log.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <new>
+#include "AudioEqualizer.h"
+#include "AudioBiquadFilter.h"
+#include "AudioFormatAdapter.h"
+#include <media/EffectEqualizerApi.h>
+
+// effect_interface_t interface implementation for equalizer effect
+extern "C" const struct effect_interface_s gEqualizerInterface;
+
+namespace android {
+namespace {
+
+// Google Graphic Equalizer UUID: e25aa840-543b-11df-98a5-0002a5d5c51b
+const effect_descriptor_t gEqualizerDescriptor = {
+        {0x0bed4300, 0xddd6, 0x11db, 0x8f34, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b}}, // type
+        {0xe25aa840, 0x543b, 0x11df, 0x98a5, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b}}, // uuid
+        EFFECT_API_VERSION,
+        (EFFECT_FLAG_TYPE_INSERT | EFFECT_FLAG_INSERT_LAST),
+        "Graphic Equalizer",
+        "Google Inc.",
+};
+static int gEffectIndex;
+
+/////////////////// BEGIN EQ PRESETS ///////////////////////////////////////////
+const int kNumBands = 5;
+const uint32_t gFreqs[kNumBands] =      { 50000, 125000, 900000, 3200000, 6300000 };
+const uint32_t gBandwidths[kNumBands] = { 0,     3600,   3600,   2400,    0       };
+
+const AudioEqualizer::BandConfig gBandsClassic[kNumBands] = {
+    { 300,  gFreqs[0], gBandwidths[0] },
+    { 400,  gFreqs[1], gBandwidths[1] },
+    { 0,    gFreqs[2], gBandwidths[2] },
+    { 200,  gFreqs[3], gBandwidths[3] },
+    { -300, gFreqs[4], gBandwidths[4] }
+};
+
+const AudioEqualizer::BandConfig gBandsJazz[kNumBands] = {
+    { -600, gFreqs[0], gBandwidths[0] },
+    { 200,  gFreqs[1], gBandwidths[1] },
+    { 400,  gFreqs[2], gBandwidths[2] },
+    { -400, gFreqs[3], gBandwidths[3] },
+    { -600, gFreqs[4], gBandwidths[4] }
+};
+
+const AudioEqualizer::BandConfig gBandsPop[kNumBands] = {
+    { 400,  gFreqs[0], gBandwidths[0] },
+    { -400, gFreqs[1], gBandwidths[1] },
+    { 300,  gFreqs[2], gBandwidths[2] },
+    { -400, gFreqs[3], gBandwidths[3] },
+    { 600,  gFreqs[4], gBandwidths[4] }
+};
+
+const AudioEqualizer::BandConfig gBandsRock[kNumBands] = {
+    { 700,  gFreqs[0], gBandwidths[0] },
+    { 400,  gFreqs[1], gBandwidths[1] },
+    { -400, gFreqs[2], gBandwidths[2] },
+    { 400,  gFreqs[3], gBandwidths[3] },
+    { 200,  gFreqs[4], gBandwidths[4] }
+};
+
+const AudioEqualizer::PresetConfig gEqualizerPresets[] = {
+    { "Classic", gBandsClassic },
+    { "Jazz",    gBandsJazz    },
+    { "Pop",     gBandsPop     },
+    { "Rock",    gBandsRock    }
+};
+
+/////////////////// END EQ PRESETS /////////////////////////////////////////////
+
+static const size_t kBufferSize = 32;
+
+typedef AudioFormatAdapter<AudioEqualizer, kBufferSize> FormatAdapter;
+
+struct EqualizerContext {
+    const struct effect_interface_s *itfe;
+    effect_config_t config;
+    FormatAdapter adapter;
+    AudioEqualizer * pEqualizer;
+};
+
+
+//--- local function prototypes
+
+int Equalizer_init(EqualizerContext *pContext);
+int Equalizer_configure(EqualizerContext *pContext, effect_config_t *pConfig);
+int Equalizer_getParameter(AudioEqualizer * pEqualizer, int32_t *pParam, size_t *pValueSize, void *pValue);
+int Equalizer_setParameter(AudioEqualizer * pEqualizer, int32_t *pParam, void *pValue);
+
+
+//
+//--- Effect Library Interface Implementation
+//
+
+extern "C" int EffectQueryNumberEffects(int *pNumEffects) {
+    *pNumEffects = 1;
+    gEffectIndex = 0;
+    return 0;
+} /* end EffectQueryNumberEffects */
+
+extern "C" int EffectQueryNext(effect_descriptor_t *pDescriptor) {
+    if (pDescriptor == NULL) {
+        return -EINVAL;
+    }
+    if (gEffectIndex++ > 0) {
+        return -ENOENT;
+    }
+    memcpy(pDescriptor, &gEqualizerDescriptor, sizeof(effect_descriptor_t));
+    return 0;
+} /* end EffectQueryNext */
+
+extern "C" int EffectCreate(effect_uuid_t *uuid,
+        effect_interface_t *pInterface) {
+    int ret;
+    int i;
+
+    LOGV("EffectLibCreateEffect start");
+
+    if (pInterface == NULL || uuid == NULL) {
+        return -EINVAL;
+    }
+
+    if (memcmp(uuid, &gEqualizerDescriptor.uuid, sizeof(effect_uuid_t)) != 0) {
+        return -EINVAL;
+    }
+
+    EqualizerContext *pContext = new EqualizerContext;
+
+    pContext->itfe = &gEqualizerInterface;
+    pContext->pEqualizer = NULL;
+
+    ret = Equalizer_init(pContext);
+    if (ret < 0) {
+        LOGW("EffectLibCreateEffect() init failed");
+        delete pContext;
+        return ret;
+    }
+
+    *pInterface = (effect_interface_t)pContext;
+
+    LOGV("EffectLibCreateEffect %p", pContext);
+
+    return 0;
+
+} /* end EffectCreate */
+
+extern "C" int EffectRelease(effect_interface_t interface) {
+    EqualizerContext * pContext = (EqualizerContext *)interface;
+
+    LOGV("EffectLibReleaseEffect %p", interface);
+    if (pContext == NULL) {
+        return -EINVAL;
+    }
+
+    pContext->pEqualizer->free();
+    delete pContext;
+
+    return 0;
+} /* end EffectRelease */
+
+
+//
+//--- local functions
+//
+
+#define CHECK_ARG(cond) {                     \
+    if (!(cond)) {                            \
+        LOGV("Invalid argument: "#cond);      \
+        return -EINVAL;                       \
+    }                                         \
+}
+
+//----------------------------------------------------------------------------
+// Equalizer_configure()
+//----------------------------------------------------------------------------
+// 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 Equalizer_configure(EqualizerContext *pContext, effect_config_t *pConfig)
+{
+    LOGV("Equalizer_configure start");
+
+    CHECK_ARG(pContext != NULL);
+    CHECK_ARG(pConfig != NULL);
+
+    CHECK_ARG(pConfig->inputCfg.samplingRate == pConfig->outputCfg.samplingRate);
+    CHECK_ARG(pConfig->inputCfg.channels == pConfig->outputCfg.channels);
+    CHECK_ARG(pConfig->inputCfg.format == pConfig->outputCfg.format);
+    CHECK_ARG((pConfig->inputCfg.channels == CHANNEL_MONO) || (pConfig->inputCfg.channels == CHANNEL_STEREO));
+    CHECK_ARG(pConfig->outputCfg.accessMode == EFFECT_BUFFER_ACCESS_WRITE
+              || pConfig->outputCfg.accessMode == EFFECT_BUFFER_ACCESS_ACCUMULATE);
+    CHECK_ARG(pConfig->inputCfg.format == PCM_FORMAT_S7_24
+              || pConfig->inputCfg.format == PCM_FORMAT_S15);
+
+    int channelCount;
+    if (pConfig->inputCfg.channels == CHANNEL_MONO) {
+        channelCount = 1;
+    } else {
+        channelCount = 2;
+    }
+    CHECK_ARG(channelCount <= AudioBiquadFilter::MAX_CHANNELS);
+
+    pContext->pEqualizer->configure(channelCount,
+                          pConfig->inputCfg.samplingRate);
+
+    pContext->adapter.configure(*pContext->pEqualizer, channelCount,
+                        pConfig->inputCfg.format,
+                        pConfig->outputCfg.accessMode);
+
+    return 0;
+}   // end Equalizer_configure
+
+
+//----------------------------------------------------------------------------
+// Equalizer_init()
+//----------------------------------------------------------------------------
+// Purpose: Initialize engine with default configuration and creates
+//     AudioEqualizer instance.
+//
+// Inputs:
+//  pContext:   effect engine context
+//
+// Outputs:
+//
+//----------------------------------------------------------------------------
+
+int Equalizer_init(EqualizerContext *pContext)
+{
+    int status;
+
+    LOGV("Equalizer_init start");
+
+    CHECK_ARG(pContext != NULL);
+
+    if (pContext->pEqualizer != NULL) {
+        pContext->pEqualizer->free();
+    }
+
+    pContext->config.inputCfg.accessMode = EFFECT_BUFFER_ACCESS_READ;
+    pContext->config.inputCfg.channels = CHANNEL_STEREO;
+    pContext->config.inputCfg.format = PCM_FORMAT_S15;
+    pContext->config.inputCfg.samplingRate = 44100;
+    pContext->config.inputCfg.bufferProvider.getBuffer = NULL;
+    pContext->config.inputCfg.bufferProvider.releaseBuffer = NULL;
+    pContext->config.inputCfg.bufferProvider.cookie = NULL;
+    pContext->config.inputCfg.mask = EFFECT_CONFIG_ALL;
+    pContext->config.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_ACCUMULATE;
+    pContext->config.outputCfg.channels = CHANNEL_STEREO;
+    pContext->config.outputCfg.format = PCM_FORMAT_S15;
+    pContext->config.outputCfg.samplingRate = 44100;
+    pContext->config.outputCfg.bufferProvider.getBuffer = NULL;
+    pContext->config.outputCfg.bufferProvider.releaseBuffer = NULL;
+    pContext->config.outputCfg.bufferProvider.cookie = NULL;
+    pContext->config.outputCfg.mask = EFFECT_CONFIG_ALL;
+
+    pContext->pEqualizer = AudioEqualizer::CreateInstance(
+        NULL,
+        kNumBands,
+        AudioBiquadFilter::MAX_CHANNELS,
+        44100,
+        gEqualizerPresets,
+        ARRAY_SIZE(gEqualizerPresets));
+
+    for (int i = 0; i < kNumBands; ++i) {
+        pContext->pEqualizer->setFrequency(i, gFreqs[i]);
+        pContext->pEqualizer->setBandwidth(i, gBandwidths[i]);
+    }
+
+    pContext->pEqualizer->enable(true);
+
+    Equalizer_configure(pContext, &pContext->config);
+
+    return 0;
+}   // end Equalizer_init
+
+
+//----------------------------------------------------------------------------
+// Equalizer_getParameter()
+//----------------------------------------------------------------------------
+// Purpose:
+// Get a Equalizer parameter
+//
+// Inputs:
+//  pEqualizer       - handle to instance data
+//  pParam           - pointer to parameter
+//  pValue           - pointer to variable to hold retrieved value
+//  pValueSize       - pointer to value size: maximum size as input
+//
+// Outputs:
+//  *pValue updated with parameter value
+//  *pValueSize updated with actual value size
+//
+//
+// Side Effects:
+//
+//----------------------------------------------------------------------------
+
+int Equalizer_getParameter(AudioEqualizer * pEqualizer, int32_t *pParam, size_t *pValueSize, void *pValue)
+{
+    int status = 0;
+    int32_t param = *pParam++;
+    int32_t param2;
+    char *name;
+
+    switch (param) {
+    case EQ_PARAM_NUM_BANDS:
+    case EQ_PARAM_CUR_PRESET:
+    case EQ_PARAM_GET_NUM_OF_PRESETS:
+        if (*pValueSize < sizeof(int16_t)) {
+            return -EINVAL;
+        }
+        *pValueSize = sizeof(int16_t);
+        break;
+
+    case EQ_PARAM_LEVEL_RANGE:
+    case EQ_PARAM_BAND_FREQ_RANGE:
+        if (*pValueSize < 2 * sizeof(int32_t)) {
+            return -EINVAL;
+        }
+        *pValueSize = 2 * sizeof(int32_t);
+        break;
+    case EQ_PARAM_BAND_LEVEL:
+    case EQ_PARAM_GET_BAND:
+    case EQ_PARAM_CENTER_FREQ:
+        if (*pValueSize < sizeof(int32_t)) {
+            return -EINVAL;
+        }
+        *pValueSize = sizeof(int32_t);
+        break;
+
+    case EQ_PARAM_GET_PRESET_NAME:
+        break;
+
+    default:
+        return -EINVAL;
+    }
+
+    switch (param) {
+    case EQ_PARAM_NUM_BANDS:
+        *(int16_t *)pValue = kNumBands;
+        LOGV("Equalizer_getParameter() EQ_PARAM_NUM_BANDS %d", *(int16_t *)pValue);
+        break;
+
+    case EQ_PARAM_LEVEL_RANGE:
+        *(int32_t *)pValue = -9600;
+        *((int32_t *)pValue + 1) = 4800;
+        LOGV("Equalizer_getParameter() EQ_PARAM_LEVEL_RANGE min %d, max %d", *(int32_t *)pValue, *((int32_t *)pValue + 1));
+        break;
+
+    case EQ_PARAM_BAND_LEVEL:
+        param2 = *pParam;
+        if (param2 >= kNumBands) {
+            status = -EINVAL;
+            break;
+        }
+        *(int32_t *)pValue = pEqualizer->getGain(param2);
+        LOGV("Equalizer_getParameter() EQ_PARAM_BAND_LEVEL band %d, level %d", param2, *(int32_t *)pValue);
+        break;
+
+    case EQ_PARAM_CENTER_FREQ:
+        param2 = *pParam;
+        if (param2 >= kNumBands) {
+            status = -EINVAL;
+            break;
+        }
+        *(int32_t *)pValue = pEqualizer->getFrequency(param2);
+        LOGV("Equalizer_getParameter() EQ_PARAM_CENTER_FREQ band %d, frequency %d", param2, *(int32_t *)pValue);
+        break;
+
+    case EQ_PARAM_BAND_FREQ_RANGE:
+        param2 = *pParam;
+        if (param2 >= kNumBands) {
+            status = -EINVAL;
+            break;
+        }
+        pEqualizer->getBandRange(param2, *(uint32_t *)pValue, *((uint32_t *)pValue + 1));
+        LOGV("Equalizer_getParameter() EQ_PARAM_BAND_FREQ_RANGE band %d, min %d, max %d", param2, *(int32_t *)pValue, *((int32_t *)pValue + 1));
+        break;
+
+    case EQ_PARAM_GET_BAND:
+        param2 = *pParam;
+        *(int32_t *)pValue = pEqualizer->getMostRelevantBand(param2);
+        LOGV("Equalizer_getParameter() EQ_PARAM_GET_BAND frequency %d, band %d", param2, *(int32_t *)pValue);
+        break;
+
+    case EQ_PARAM_CUR_PRESET:
+        *(int16_t *)pValue = pEqualizer->getPreset();
+        LOGV("Equalizer_getParameter() EQ_PARAM_CUR_PRESET %d", *(int32_t *)pValue);
+        break;
+
+    case EQ_PARAM_GET_NUM_OF_PRESETS:
+        *(int16_t *)pValue = pEqualizer->getNumPresets();
+        LOGV("Equalizer_getParameter() EQ_PARAM_GET_NUM_OF_PRESETS %d", *(int16_t *)pValue);
+        break;
+
+    case EQ_PARAM_GET_PRESET_NAME:
+        param2 = *pParam;
+        if (param2 >= pEqualizer->getNumPresets()) {
+            status = -EINVAL;
+            break;
+        }
+        name = (char *)pValue;
+        strncpy(name, pEqualizer->getPresetName(param2), *pValueSize - 1);
+        name[*pValueSize - 1] = 0;
+        *pValueSize = strlen(name) + 1;
+        LOGV("Equalizer_getParameter() EQ_PARAM_GET_PRESET_NAME preset %d, name %s len %d", param2, gEqualizerPresets[param2].name, *pValueSize);
+        break;
+
+    default:
+        LOGV("Equalizer_getParameter() invalid param %d", param);
+        status = -EINVAL;
+        break;
+    }
+
+    return status;
+} // end Equalizer_getParameter
+
+
+//----------------------------------------------------------------------------
+// Equalizer_setParameter()
+//----------------------------------------------------------------------------
+// Purpose:
+// Set a Equalizer parameter
+//
+// Inputs:
+//  pEqualizer       - handle to instance data
+//  pParam           - pointer to parameter
+//  pValue           - pointer to value
+//
+// Outputs:
+//
+//
+// Side Effects:
+//
+//----------------------------------------------------------------------------
+
+int Equalizer_setParameter (AudioEqualizer * pEqualizer, int32_t *pParam, void *pValue)
+{
+    int status = 0;
+    int32_t preset;
+    int32_t band;
+    int32_t level;
+    int32_t param = *pParam++;
+
+
+    switch (param) {
+    case EQ_PARAM_CUR_PRESET:
+        preset = *(int16_t *)pValue;
+
+        LOGV("setParameter() EQ_PARAM_CUR_PRESET %d", preset);
+        if (preset >= pEqualizer->getNumPresets()) {
+            status = -EINVAL;
+            break;
+        }
+        pEqualizer->setPreset(preset);
+        pEqualizer->commit(true);
+        break;
+    case EQ_PARAM_BAND_LEVEL:
+        band =  *pParam;
+        level = *(int32_t *)pValue;
+        LOGV("setParameter() EQ_PARAM_BAND_LEVEL band %d, level %d", band, level);
+        if (band >= kNumBands) {
+            status = -EINVAL;
+            break;
+        }
+        pEqualizer->setGain(band, level);
+        pEqualizer->commit(true);
+       break;
+    default:
+        LOGV("setParameter() invalid param %d", param);
+        break;
+    }
+
+    return status;
+} // end Equalizer_setParameter
+
+} // namespace
+} // namespace
+
+
+//
+//--- Effect Control Interface Implementation
+//
+
+extern "C" int Equalizer_process(effect_interface_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer)
+{
+    android::EqualizerContext * pContext = (android::EqualizerContext *) self;
+
+    if (pContext == NULL) {
+        return -EINVAL;
+    }
+    if (inBuffer == NULL || inBuffer->raw == NULL ||
+        outBuffer == NULL || outBuffer->raw == NULL ||
+        inBuffer->frameCount != outBuffer->frameCount) {
+        return -EINVAL;
+    }
+
+    pContext->adapter.process(inBuffer->raw, outBuffer->raw, outBuffer->frameCount);
+    return 0;
+}   // end Equalizer_process
+
+extern "C" int Equalizer_command(effect_interface_t self, int cmdCode, int cmdSize,
+        void *pCmdData, int *replySize, void *pReplyData) {
+
+    android::EqualizerContext * pContext = (android::EqualizerContext *) self;
+    int retsize;
+
+    if (pContext == NULL) {
+        return -EINVAL;
+    }
+
+    android::AudioEqualizer * pEqualizer = pContext->pEqualizer;
+
+    LOGV("Equalizer_command command %d cmdSize %d",cmdCode, cmdSize);
+
+    switch (cmdCode) {
+    case EFFECT_CMD_INIT:
+        if (pReplyData == NULL || *replySize != sizeof(int)) {
+            return -EINVAL;
+        }
+        *(int *) pReplyData = Equalizer_init(pContext);
+        break;
+    case EFFECT_CMD_CONFIGURE:
+        if (pCmdData == NULL || cmdSize != sizeof(effect_config_t)
+                || pReplyData == NULL || *replySize != sizeof(int)) {
+            return -EINVAL;
+        }
+        *(int *) pReplyData = Equalizer_configure(pContext,
+                (effect_config_t *) pCmdData);
+        break;
+    case EFFECT_CMD_RESET:
+        Equalizer_configure(pContext, &pContext->config);
+        break;
+    case EFFECT_CMD_GET_PARAM: {
+        if (pCmdData == NULL || cmdSize < (int)(sizeof(effect_param_t) + sizeof(int32_t)) ||
+            pReplyData == NULL || *replySize < (int) (sizeof(effect_param_t) + sizeof(int32_t))) {
+            return -EINVAL;
+        }
+        effect_param_t *p = (effect_param_t *)pCmdData;
+        memcpy(pReplyData, pCmdData, sizeof(effect_param_t) + p->psize);
+        p = (effect_param_t *)pReplyData;
+        int voffset = ((p->psize - 1) / sizeof(int32_t) + 1) * sizeof(int32_t);
+        p->status = android::Equalizer_getParameter(pEqualizer, (int32_t *)p->data, &p->vsize,
+                p->data + voffset);
+        *replySize = sizeof(effect_param_t) + voffset + p->vsize;
+        LOGV("Equalizer_command EFFECT_CMD_GET_PARAM *pCmdData %d, *replySize %d, *pReplyData %08x %08x",
+                *(int32_t *)((char *)pCmdData + sizeof(effect_param_t)), *replySize,
+                *(int32_t *)((char *)pReplyData + sizeof(effect_param_t) + voffset),
+                *(int32_t *)((char *)pReplyData + sizeof(effect_param_t) + voffset + sizeof(int32_t)));
+
+        } break;
+    case EFFECT_CMD_SET_PARAM: {
+        LOGV("Equalizer_command EFFECT_CMD_SET_PARAM cmdSize %d pCmdData %p, *replySize %d, pReplyData %p", cmdSize, pCmdData, *replySize, pReplyData);
+        if (pCmdData == NULL || cmdSize < (int)(sizeof(effect_param_t) + sizeof(int32_t)) ||
+            pReplyData == NULL || *replySize != sizeof(int32_t)) {
+            return -EINVAL;
+        }
+        effect_param_t *p = (effect_param_t *) pCmdData;
+        *(int *)pReplyData = android::Equalizer_setParameter(pEqualizer, (int32_t *)p->data,
+                p->data + p->psize);
+        } break;
+    default:
+        LOGW("Equalizer_command invalid command %d",cmdCode);
+        return -EINVAL;
+    }
+
+    return 0;
+}
+
+// effect_interface_t interface implementation for equalizer effect
+const struct effect_interface_s gEqualizerInterface = {
+        Equalizer_process,
+        Equalizer_command
+};
+
+