Hello,
I am using OpenSL ES for my android app and implemented it already.But I have a problem.
1.open a file from sdcard.
2.add effect(reverb).
3.save to sdcard.
4.play the music with effect file from sdcard.
Thank you in advance!
Thanks for your help.
this is jni file.
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <fcntl.h>
#define ANDROID
#include <SLES/OpenSLES.h>
#ifdef ANDROID
#include <SLES/OpenSLES_Android.h>
#endif
#include <jni.h>
#include <sys/types.h>
#include <android/asset_manager.h>
#include <android/asset_manager_jni.h>
#include <android/log.h>
#define MAX_NUMBER_INTERFACES 4
#define TIME_S_BETWEEN_SETTING_CHANGE 3
//-----------------------------------------------------------------
/* Exits the application if an error is encountered */
#define ExitOnError(x) ExitOnErrorFuncReverb(x,LINE)
void ExitOnErrorFuncReverb(SLresult result, int line) {
if (SL_RESULT_SUCCESS != result) {
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"%u error code encountered at line %d, exiting
", result,
line);
exit (EXIT_FAILURE);
}
}
// Prefetch status callback
#define PREFETCHEVENT_ERROR_CANDIDATE
(SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
SLboolean errorInPrefetchCallback = SL_BOOLEAN_FALSE;
void prefetch_callback(SLPrefetchStatusItf caller, void *context,
SLuint32 event) {
SLresult result;
assert(context == NULL);
SLpermille level;
result = (*caller)->GetFillLevel(caller, &level);
ExitOnError(result);
SLuint32 status;
result = (*caller)->GetPrefetchStatus(caller, &status);
ExitOnError(result);
if ((PREFETCHEVENT_ERROR_CANDIDATE
== (event & PREFETCHEVENT_ERROR_CANDIDATE))
&& (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)){
errorInPrefetchCallback = SL_BOOLEAN_TRUE;
}
}
//-----------------------------------------------------------------
/* Play an audio path and feed a global reverb */
void TestSendToPresetReverb(SLObjectItf sl, const char* path, int preset,
SLmillibel directLevel, SLmillibel sendLevel, bool alwaysOn, bool useFd,
bool loop) {
SLresult result;
SLEngineItf EngineItf;
/* Objects this application uses: one player and an ouput mix */
SLObjectItf player, outputMix;
/* Source of audio data to play */
SLDataSource audioSource;
#ifdef ANDROID
SLDataLocator_AndroidFD locatorFd;
#endif
SLDataLocator_URI locatorUri;
SLDataFormat_MIME mime;
/* Data sinks for the audio player */
SLDataSink audioSink;
SLDataLocator_OutputMix locator_outputmix;
/* Interfaces for the audio player */
SLPlayItf playItf;
SLPrefetchStatusItf prefetchItf;
SLEffectSendItf effectSendItf;
SLSeekItf seekItf;
/* Interface for the output mix */
SLPresetReverbItf reverbItf;
SLboolean required[MAX_NUMBER_INTERFACES];
SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
/* Get the SL Engine Interface which is implicit */
result = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*) &EngineItf);
ExitOnError(result);
/* ------------------------------------------------------------------------------------------------ */
/*
/* Create Output Mix object to be used by the player
/*
/* ------------------------------------------------------------------------------------------------ */
/* Initialize arrays required[] and iidArray[] */
for (int i = 0; i < MAX_NUMBER_INTERFACES; i++) {
required[i] = SL_BOOLEAN_FALSE;
iidArray[i] = SL_IID_NULL;
}
/* Set arrays required[] and iidArray[] for required interfaces */
required[0] = SL_BOOLEAN_TRUE;
iidArray[0] = SL_IID_PRESETREVERB;
result = (*EngineItf)->CreateOutputMix(EngineItf, &outputMix, 1, iidArray,
required);
ExitOnError(result);
/* Realize the Output Mix object in synchronous mode */
result = (*outputMix)->Realize(outputMix, SL_BOOLEAN_FALSE );
ExitOnError(result);
/* Get the SLPresetReverbItf for the output mix */
result = (*outputMix)->GetInterface(outputMix, SL_IID_PRESETREVERB,
(void*) &reverbItf);
ExitOnError(result);
/* ------------------------------------------------------------------------------------------------ */
/*
/*Setup the data sink structure
/*SLDataLocator_OutputMix
/* ------------------------------------------------------------------------------------------------ */
locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
locator_outputmix.outputMix = outputMix;
audioSink.pLocator = (void*) &locator_outputmix;
audioSink.pFormat = NULL;
result = (*reverbItf)->SetPreset(reverbItf, preset);
ExitOnError(result);
/* ------------------------------------------------------------------------------------------------ */
/*
/* Configuration SLDataSource
* SLDataLocator_URI
* SLDataLocator_AndroidFD
/* ------------------------------------------------------------------------------------------------ */
//audiosource pLocator
locatorUri.locatorType = SL_DATALOCATOR_URI;
locatorUri.URI = (SLchar *) path;
audioSource.pLocator = (void*) &locatorUri;
if (useFd) {
/* Setup the data source structure for the URI */
locatorFd.locatorType = SL_DATALOCATOR_ANDROIDFD;
int fd = open(path, O_RDONLY);
if (fd == -1) {
perror(path);
exit (EXIT_FAILURE);
}
locatorFd.fd = (SLint32) fd;
locatorFd.length = SL_DATALOCATOR_ANDROIDFD_USE_FILE_SIZE;
locatorFd.offset = 0;
audioSource.pLocator = (void*) &locatorFd;
}
//audiosource format
mime.formatType = SL_DATAFORMAT_MIME;
/* this is how ignored mime information is specified, according to OpenSL ES spec
* in 9.1.6 SLDataFormat_MIME and 8.23 SLMetadataTraversalItf GetChildInfo */
mime.mimeType = (SLchar*) NULL;
mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
audioSource.pFormat = (void*) &mime;
/* ------------------------------------------------------------------------------------------------ */
/*
/* Create the audio player
/* ------------------------------------------------------------------------------------------------ */
/* Set arrays required[] and iidArray[] for required interfaces */
/* (SLPlayItf is implicit) */
required[0] = SL_BOOLEAN_TRUE;
iidArray[0] = SL_IID_PREFETCHSTATUS;
required[1] = SL_BOOLEAN_TRUE;
iidArray[1] = SL_IID_EFFECTSEND;
required[2] = SL_BOOLEAN_TRUE;
iidArray[2] = SL_IID_SEEK;
result = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource,
&audioSink, 3, iidArray, required);
ExitOnError(result);
/* Realize the player in synchronous mode. */
result = (*player)->Realize(player, SL_BOOLEAN_FALSE );
ExitOnError(result);
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"URI example: after Realize
");
/* Get the SLPlayItf, SLPrefetchStatusItf and SLEffectSendItf interfaces for the player*/
result = (*player)->GetInterface(player, SL_IID_PLAY, (void*) &playItf);
ExitOnError(result);
result = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS,
(void*) &prefetchItf);
ExitOnError(result);
result = (*prefetchItf)->RegisterCallback(prefetchItf, prefetch_callback,
NULL);
ExitOnError(result);
result = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE );
ExitOnError(result);
result = (*player)->GetInterface(player, SL_IID_EFFECTSEND,
(void*) &effectSendItf);
ExitOnError(result);
result = (*player)->GetInterface(player, SL_IID_SEEK, (void*) &seekItf);
ExitOnError(result);
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"Player configured
");
/* ------------------------------------------------------ */
/* Playback and test */
/* Start the data prefetching by setting the player to the paused state */
result = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_PAUSED );
ExitOnError(result);
/* Wait until there's data to play */
SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
while (prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA ) {
if (errorInPrefetchCallback) {
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"Error during prefetch, exiting
");
exit (EXIT_FAILURE);
}
usleep(100 * 1000);
(*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
ExitOnError(result);
}
/* Get duration */
SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
result = (*playItf)->GetDuration(playItf, &durationInMsec);
ExitOnError(result);
if (durationInMsec == SL_TIME_UNKNOWN ) {
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"Duration unknown, assuming 10 seconds
");
durationInMsec = 10000;
} else {
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"Duration is %.1f seconds
", durationInMsec / 1000.0);
}
/* Feed the output mix' reverb from the audio player using the given send level */
result = (*effectSendItf)->EnableEffectSend(effectSendItf, reverbItf,
SL_BOOLEAN_TRUE, sendLevel);
ExitOnError(result);
result = (*effectSendItf)->SetDirectLevel(effectSendItf, directLevel);
ExitOnError(result);
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"Set direct level to %dmB
", directLevel);
result = (*effectSendItf)->SetSendLevel(effectSendItf, reverbItf,
sendLevel);
ExitOnError(result);
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"Set send level to %dmB
", sendLevel);
/* Enable looping */
if (loop) {
result = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE,
(SLmillisecond) 0, SL_TIME_UNKNOWN );
ExitOnError(result);
}
result = (*player)->GetInterface(player, SL_IID_PLAY, (void*) &playItf);
/* Start playback */
result = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_PLAYING );
ExitOnError(result);
/* Disable preset reverb every TIME_S_BETWEEN_SETTING_CHANGE seconds unless always on */
SLboolean previousEnabled = SL_BOOLEAN_FALSE;
SLuint32 playState;
for (;;) {
result = (*playItf)->GetPlayState(playItf, &playState);
ExitOnError(result);
if (playState != SL_PLAYSTATE_PLAYING )
break;
SLboolean enabled;
enabled = alwaysOn || !previousEnabled;
if (enabled != previousEnabled) {
result = (*reverbItf)->SetPreset(reverbItf,
enabled ? preset : SL_REVERBPRESET_NONE );
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"SetPreset(%d)=%d
",
enabled ? preset : SL_REVERBPRESET_NONE, result);
ExitOnError(result);
previousEnabled = enabled;
if (enabled) {
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"Reverb on
");
} else {
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"Reverb off
");
}
}
usleep(TIME_S_BETWEEN_SETTING_CHANGE * 1000 * 1000);
}
/* Make sure player is stopped */
assert(playState == SL_PLAYSTATE_STOPPED );
#if 0
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,"Stopping playback
");
result = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
ExitOnError(result);
#endif
/* Destroy the player */
(*player)->Destroy(player);
/* Destroy Output Mix object */
(*outputMix)->Destroy(outputMix);
#ifdef ANDROID
if (useFd)
close(locatorFd.fd);
#endif
}
extern “C” {
int Java_com_example_nativeaudio_NativeAudio_sendToPresetReverb(JNIEnv* env,
jclass clazz, jstring fileDirectory, jstring fileName) {
const char *directory = env->GetStringUTFChars(fileDirectory, 0);
const char *name = env->GetStringUTFChars(fileName, 0);
const char *programName = directory;
SLresult result;
SLObjectItf sl;
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"OpenSL ES test %s: exercises SLEffectSendItf ", programName);
__android_log_print(ANDROID_LOG_INFO, "audio_effect",
"on AudioPlayer and SLPresetReverbItf on OutputMix.
");
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"Plays the sound file designated by the given path, ");
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"and sends a specified amount of energy to a global reverb
");
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"(sendLevel in mB), with a given direct level (in mB).
");
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"Every %d seconds, the reverb is turned on and off,
",
TIME_S_BETWEEN_SETTING_CHANGE);
__android_log_print(ANDROID_LOG_INFO, “audio_effect”,
"unless the --always-on option is specified before the path.
");
bool alwaysOn = true;
bool useFd = true;
bool loop = false;
SLEngineOption EngineOption[] = { { (SLuint32) SL_ENGINEOPTION_THREADSAFE,
(SLuint32) SL_BOOLEAN_TRUE } };
result = slCreateEngine(&sl, 1, EngineOption, 0, NULL, NULL);
ExitOnError(result);
/* Realizing the SL Engine in synchronous mode. */
result = (*sl)->Realize(sl, SL_BOOLEAN_FALSE );
ExitOnError(result);
// intentionally not checking that levels are of correct value
TestSendToPresetReverb(sl, name, (SLmillibel) (SL_REVERBPRESET_MEDIUMHALL ),
(SLmillibel) (-1000), (SLmillibel) (-1000), alwaysOn, useFd, loop);
/* Shutdown OpenSL ES */
(*sl)->Destroy(sl);
return EXIT_SUCCESS;
}
}