/*
* 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 <string.h>
#include <new>
#include "AudioEqualizer.h"
#include "AudioBiquadFilter.h"
#include "AudioFormatAdapter.h"
#include <audio_effects/effect_equalizer.h>
// effect_handle_t interface implementation for equalizer effect
extern "C" const struct effect_interface_s gEqualizerInterface;
enum equalizer_state_e {
EQUALIZER_STATE_UNINITIALIZED,
EQUALIZER_STATE_INITIALIZED,
EQUALIZER_STATE_ACTIVE,
};
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_CONTROL_API_VERSION,
(EFFECT_FLAG_TYPE_INSERT | EFFECT_FLAG_INSERT_LAST),
0, // TODO
1,
"Graphic Equalizer",
"The Android Open Source Project",
};
/////////////////// 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;
uint32_t state;
};
//--- local function prototypes
int Equalizer_init(EqualizerContext *pContext);
int Equalizer_setConfig(EqualizerContext *pContext, effect_config_t *pConfig);
int Equalizer_getParameter(AudioEqualizer * pEqualizer, int32_t *pParam, uint32_t *pValueSize, void *pValue);
int Equalizer_setParameter(AudioEqualizer * pEqualizer, int32_t *pParam, void *pValue);
//
//--- Effect Library Interface Implementation
//
extern "C" int EffectCreate(const effect_uuid_t *uuid,
int32_t sessionId,
int32_t ioId,
effect_handle_t *pHandle) {
int ret;
int i;
ALOGV("EffectLibCreateEffect start");
if (pHandle == 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;
pContext->state = EQUALIZER_STATE_UNINITIALIZED;
ret = Equalizer_init(pContext);
if (ret < 0) {
ALOGW("EffectLibCreateEffect() init failed");
delete pContext;
return ret;
}
*pHandle = (effect_handle_t)pContext;
pContext->state = EQUALIZER_STATE_INITIALIZED;
ALOGV("EffectLibCreateEffect %p, size %d",
pContext, AudioEqualizer::GetInstanceSize(kNumBands)+sizeof(EqualizerContext));
return 0;
} /* end EffectCreate */
extern "C" int EffectRelease(effect_handle_t handle) {
EqualizerContext * pContext = (EqualizerContext *)handle;
ALOGV("EffectLibReleaseEffect %p", handle);
if (pContext == NULL) {
return -EINVAL;
}
pContext->state = EQUALIZER_STATE_UNINITIALIZED;
pContext->pEqualizer->free();
delete pContext;
return 0;
} /* end EffectRelease */
extern "C" int EffectGetDescriptor(const effect_uuid_t *uuid,
effect_descriptor_t *pDescriptor) {
if (pDescriptor == NULL || uuid == NULL){
ALOGV("EffectGetDescriptor() called with NULL pointer");
return -EINVAL;
}
if (memcmp(uuid, &gEqualizerDescriptor.uuid, sizeof(effect_uuid_t)) == 0) {
*pDescriptor = gEqualizerDescriptor;
return 0;
}
return -EINVAL;
} /* end EffectGetDescriptor */
//
//--- local functions
//
#define CHECK_ARG(cond) { \
if (!(cond)) { \
ALOGV("Invalid argument: "#cond); \
return -EINVAL; \
} \
}
//----------------------------------------------------------------------------
// Equalizer_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 Equalizer_setConfig(EqualizerContext *pContext, effect_config_t *pConfig)
{
ALOGV("Equalizer_setConfig 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 == AUDIO_CHANNEL_OUT_MONO) ||
(pConfig->inputCfg.channels == AUDIO_CHANNEL_OUT_STEREO));
CHECK_ARG(pConfig->outputCfg.accessMode == EFFECT_BUFFER_ACCESS_WRITE
|| pConfig->outputCfg.accessMode == EFFECT_BUFFER_ACCESS_ACCUMULATE);
CHECK_ARG(pConfig->inputCfg.format == AUDIO_FORMAT_PCM_16_BIT);
int channelCount;
if (pConfig->inputCfg.channels == AUDIO_CHANNEL_OUT_MONO) {
channelCount = 1;
} else {
channelCount = 2;
}
CHECK_ARG(channelCount <= AudioBiquadFilter::MAX_CHANNELS);
pContext->config = *pConfig;
pContext->pEqualizer->configure(channelCount,
pConfig->inputCfg.samplingRate);
pContext->adapter.configure(*pContext->pEqualizer, channelCount,
pConfig->inputCfg.format,
pConfig->outputCfg.accessMode);
return 0;
} // end Equalizer_setConfig
//----------------------------------------------------------------------------
// Equalizer_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 Equalizer_getConfig(EqualizerContext *pContext, effect_config_t *pConfig)
{
*pConfig = pContext->config;
} // end Equalizer_getConfig
//----------------------------------------------------------------------------
// 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;
ALOGV("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 = AUDIO_CHANNEL_OUT_STEREO;
pContext->config.inputCfg.format = AUDIO_FORMAT_PCM_16_BIT;
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 = AUDIO_CHANNEL_OUT_STEREO;
pContext->config.outputCfg.format = AUDIO_FORMAT_PCM_16_BIT;
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_setConfig(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, uint32_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:
case EQ_PARAM_BAND_LEVEL:
case EQ_PARAM_GET_BAND:
if (*pValueSize < sizeof(int16_t)) {
return -EINVAL;
}
*pValueSize = sizeof(int16_t);
break;
case EQ_PARAM_LEVEL_RANGE:
if (*pValueSize < 2 * sizeof(int16_t)) {
return -EINVAL;
}
*pValueSize = 2 * sizeof(int16_t);
break;
case EQ_PARAM_BAND_FREQ_RANGE:
if (*pValueSize < 2 * sizeof(int32_t)) {
return -EINVAL;
}
*pValueSize = 2 * sizeof(int32_t);
break;
case EQ_PARAM_CENTER_FREQ:
if (*pValueSize < sizeof(int32_t)) {
return -EINVAL;
}
*pValueSize = sizeof(int32_t);
break;
case EQ_PARAM_GET_PRESET_NAME:
break;
case EQ_PARAM_PROPERTIES:
if (*pValueSize < (2 + kNumBands) * sizeof(uint16_t)) {
return -EINVAL;
}
*pValueSize = (2 + kNumBands) * sizeof(uint16_t);
break;
default:
return -EINVAL;
}
switch (param) {
case EQ_PARAM_NUM_BANDS:
*(uint16_t *)pValue = (uint16_t)kNumBands;
ALOGV("Equalizer_getParameter() EQ_PARAM_NUM_BANDS %d", *(int16_t *)pValue);
break;
case EQ_PARAM_LEVEL_RANGE:
*(int16_t *)pValue = -9600;
*((int16_t *)pValue + 1) = 4800;
ALOGV("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;
}
*(int16_t *)pValue = (int16_t)pEqualizer->getGain(param2);
ALOGV("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);
ALOGV("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));
ALOGV("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;
*(uint16_t *)pValue = (uint16_t)pEqualizer->getMostRelevantBand(param2);
ALOGV("Equalizer_getParameter() EQ_PARAM_GET_BAND frequency %d, band %d",
param2, *(int32_t *)pValue);
break;
case EQ_PARAM_CUR_PRESET:
*(uint16_t *)pValue = (uint16_t)pEqualizer->getPreset();
ALOGV("Equalizer_getParameter() EQ_PARAM_CUR_PRESET %d", *(int32_t *)pValue);
break;
case EQ_PARAM_GET_NUM_OF_PRESETS:
*(uint16_t *)pValue = (uint16_t)pEqualizer->getNumPresets();
ALOGV("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;
ALOGV("Equalizer_getParameter() EQ_PARAM_GET_PRESET_NAME preset %d, name %s len %d",
param2, gEqualizerPresets[param2].name, *pValueSize);
break;
case EQ_PARAM_PROPERTIES: {
int16_t *p = (int16_t *)pValue;
ALOGV("Equalizer_getParameter() EQ_PARAM_PROPERTIES");
p[0] = (int16_t)pEqualizer->getPreset();
p[1] = (int16_t)kNumBands;
for (int i = 0; i < kNumBands; i++) {
p[2 + i] = (int16_t)pEqualizer->getGain(i);
}
} break;
default:
ALOGV("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 = (int32_t)(*(uint16_t *)pValue);
ALOGV("setParameter() EQ_PARAM_CUR_PRESET %d", preset);
if (preset < 0 || preset >= pEqualizer->getNumPresets()) {
status = -EINVAL;
break;
}
pEqualizer->setPreset(preset);
pEqualizer->commit(true);
break;
case EQ_PARAM_BAND_LEVEL:
band = *pParam;
level = (int32_t)(*(int16_t *)pValue);
ALOGV("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;
case EQ_PARAM_PROPERTIES: {
ALOGV("setParameter() EQ_PARAM_PROPERTIES");
int16_t *p = (int16_t *)pValue;
if ((int)p[0] >= pEqualizer->getNumPresets()) {
status = -EINVAL;
break;
}
if (p[0] >= 0) {
pEqualizer->setPreset((int)p[0]);
} else {
if ((int)p[1] != kNumBands) {
status = -EINVAL;
break;
}
for (int i = 0; i < kNumBands; i++) {
pEqualizer->setGain(i, (int32_t)p[2 + i]);
}
}
pEqualizer->commit(true);
} break;
default:
ALOGV("setParameter() invalid param %d", param);
status = -EINVAL;
break;
}
return status;
} // end Equalizer_setParameter
} // namespace
} // namespace
//
//--- Effect Control Interface Implementation
//
extern "C" int Equalizer_process(effect_handle_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;
}
if (pContext->state == EQUALIZER_STATE_UNINITIALIZED) {
return -EINVAL;
}
if (pContext->state == EQUALIZER_STATE_INITIALIZED) {
return -ENODATA;
}
pContext->adapter.process(inBuffer->raw, outBuffer->raw, outBuffer->frameCount);
return 0;
} // end Equalizer_process
extern "C" int Equalizer_command(effect_handle_t self, uint32_t cmdCode, uint32_t cmdSize,
void *pCmdData, uint32_t *replySize, void *pReplyData) {
android::EqualizerContext * pContext = (android::EqualizerContext *) self;
int retsize;
if (pContext == NULL || pContext->state == EQUALIZER_STATE_UNINITIALIZED) {
return -EINVAL;
}
android::AudioEqualizer * pEqualizer = pContext->pEqualizer;
ALOGV("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_SET_CONFIG:
if (pCmdData == NULL || cmdSize != sizeof(effect_config_t)
|| pReplyData == NULL || *replySize != sizeof(int)) {
return -EINVAL;
}
*(int *) pReplyData = Equalizer_setConfig(pContext,
(effect_config_t *) pCmdData);
break;
case EFFECT_CMD_GET_CONFIG:
if (pReplyData == NULL || *replySize != sizeof(effect_config_t)) {
return -EINVAL;
}
Equalizer_getConfig(pContext, (effect_config_t *) pCmdData);
break;
case EFFECT_CMD_RESET:
Equalizer_setConfig(pContext, &pContext->config);
break;
case EFFECT_CMD_GET_PARAM: {
if (pCmdData == NULL || cmdSize < (sizeof(effect_param_t) + sizeof(int32_t)) ||
pReplyData == NULL || *replySize < (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;
ALOGV("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: {
ALOGV("Equalizer_command EFFECT_CMD_SET_PARAM cmdSize %d pCmdData %p, *replySize %d, pReplyData %p",
cmdSize, pCmdData, *replySize, pReplyData);
if (pCmdData == NULL || cmdSize < (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;
case EFFECT_CMD_ENABLE:
if (pReplyData == NULL || *replySize != sizeof(int)) {
return -EINVAL;
}
if (pContext->state != EQUALIZER_STATE_INITIALIZED) {
return -ENOSYS;
}
pContext->state = EQUALIZER_STATE_ACTIVE;
ALOGV("EFFECT_CMD_ENABLE() OK");
*(int *)pReplyData = 0;
break;
case EFFECT_CMD_DISABLE:
if (pReplyData == NULL || *replySize != sizeof(int)) {
return -EINVAL;
}
if (pContext->state != EQUALIZER_STATE_ACTIVE) {
return -ENOSYS;
}
pContext->state = EQUALIZER_STATE_INITIALIZED;
ALOGV("EFFECT_CMD_DISABLE() OK");
*(int *)pReplyData = 0;
break;
case EFFECT_CMD_SET_DEVICE:
case EFFECT_CMD_SET_VOLUME:
case EFFECT_CMD_SET_AUDIO_MODE:
break;
default:
ALOGW("Equalizer_command invalid command %d",cmdCode);
return -EINVAL;
}
return 0;
}
extern "C" int Equalizer_getDescriptor(effect_handle_t self,
effect_descriptor_t *pDescriptor)
{
android::EqualizerContext * pContext = (android::EqualizerContext *) self;
if (pContext == NULL || pDescriptor == NULL) {
ALOGV("Equalizer_getDescriptor() invalid param");
return -EINVAL;
}
*pDescriptor = android::gEqualizerDescriptor;
return 0;
}
// effect_handle_t interface implementation for equalizer effect
const struct effect_interface_s gEqualizerInterface = {
Equalizer_process,
Equalizer_command,
Equalizer_getDescriptor,
NULL
};
audio_effect_library_t AUDIO_EFFECT_LIBRARY_INFO_SYM = {
tag : AUDIO_EFFECT_LIBRARY_TAG,
version : EFFECT_LIBRARY_API_VERSION,
name : "Test Equalizer Library",
implementor : "The Android Open Source Project",
create_effect : android::EffectCreate,
release_effect : android::EffectRelease,
get_descriptor : android::EffectGetDescriptor,
};