tests/examples/slesTestSendToPresetReverb.cpp - platform/frameworks/wilhelm - Git at Google

 /*
  * 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.
  */

 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/time.h>
 #include <fcntl.h>

 #include <SLES/OpenSLES.h>
 #ifdef ANDROID
 #include <SLES/OpenSLES_Android.h>
 #endif


 #define MAX_NUMBER_INTERFACES 4

 #define TIME_S_BETWEEN_SETTING_CHANGE 3

 //-----------------------------------------------------------------
 /* Exits the application if an error is encountered */
 #define ExitOnError(x) ExitOnErrorFunc(x,__LINE__)

 void ExitOnErrorFunc( SLresult result , int line)
 {
     if (SL_RESULT_SUCCESS != result) {
         fprintf(stderr, "%u error code encountered at line %d, exiting\n", 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);

     /* Initialize arrays required[] and iidArray[] */
     for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
         required[i] = SL_BOOLEAN_FALSE;
         iidArray[i] = SL_IID_NULL;
     }

     /* ------------------------------------------------------ */
     /* Configuration of the output mix  */

     /* Set arrays required[] and iidArray[] for required interfaces */
     required[0] = SL_BOOLEAN_TRUE;
     iidArray[0] = SL_IID_PRESETREVERB;

     /* Create Output Mix object to be used by the player */
      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 */
     locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
     locator_outputmix.outputMix   = outputMix;
     audioSink.pLocator            = (void*)&locator_outputmix;
     audioSink.pFormat             = NULL;

     /* Select the reverb preset */
     fprintf(stdout, "\nUsing preset ");
     switch(preset) {
         case SL_REVERBPRESET_NONE:
             fprintf(stdout, "SL_REVERBPRESET_NONE, don't expect to hear reverb\n");
             break;
         case SL_REVERBPRESET_SMALLROOM: fprintf(stdout, "SL_REVERBPRESET_SMALLROOM\n"); break;
         case SL_REVERBPRESET_MEDIUMROOM: fprintf(stdout, "SL_REVERBPRESET_MEDIUMROOM\n"); break;
         case SL_REVERBPRESET_LARGEROOM: fprintf(stdout, "SL_REVERBPRESET_LARGEROOM\n"); break;
         case SL_REVERBPRESET_MEDIUMHALL: fprintf(stdout, "SL_REVERBPRESET_MEDIUMHALL\n"); break;
         case SL_REVERBPRESET_LARGEHALL: fprintf(stdout, "SL_REVERBPRESET_LARGEHALL\n"); break;
         case SL_REVERBPRESET_PLATE: fprintf(stdout, "SL_REVERBPRESET_PLATE\n"); break;
         default:
             fprintf(stdout, "unknown, use at your own risk\n"); break;
     }
     result = (*reverbItf)->SetPreset(reverbItf, preset);
     ExitOnError(result);

     /* ------------------------------------------------------ */
     /* Configuration of the 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;

     locatorUri.locatorType = SL_DATALOCATOR_URI;
     locatorUri.URI = (SLchar *) path;
     audioSource.pLocator = (void*)&locatorUri;
     if (useFd) {
 #ifdef ANDROID
         /* 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;
 #else
         fprintf(stderr, "option --fd is not supported\n");
 #endif
     }

     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 */
     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);
     fprintf(stdout, "URI example: after Realize\n");

     /* 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);

     fprintf(stdout, "Player configured\n");

     /* ------------------------------------------------------ */
     /* 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) {
             fprintf(stderr, "Error during prefetch, exiting\n");
             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) {
         printf("Duration unknown, assuming 10 seconds\n");
         durationInMsec = 10000;
     } else {
         printf("Duration is %.1f seconds\n", 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);
     fprintf(stdout, "Set direct level to %dmB\n", directLevel);

     result = (*effectSendItf)->SetSendLevel(effectSendItf, reverbItf, sendLevel);
     ExitOnError(result);
     fprintf(stdout, "Set send level to %dmB\n", sendLevel);

     /* Enable looping */
     if (loop) {
         result = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, (SLmillisecond) 0, SL_TIME_UNKNOWN);
         ExitOnError(result);
     }

     /* 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);
             fprintf(stdout, "SetPreset(%d)=%d\n", enabled ? preset : SL_REVERBPRESET_NONE, result);
             ExitOnError(result);
             previousEnabled = enabled;
             if (enabled) {
                 fprintf(stdout, "Reverb on\n");
             } else {
                 fprintf(stdout, "Reverb off\n");
             }
         }
         usleep(TIME_S_BETWEEN_SETTING_CHANGE * 1000 * 1000);
     }

     /* Make sure player is stopped */
     assert(playState == SL_PLAYSTATE_STOPPED);
 #if 0
     fprintf(stdout, "Stopping playback\n");
     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
 }

 //-----------------------------------------------------------------
 int main(int argc, char* const argv[])
 {
     const char *programName = argv[0];
     SLresult    result;
     SLObjectItf sl;

     fprintf(stdout, "OpenSL ES test %s: exercises SLEffectSendItf ", programName);
     fprintf(stdout, "on AudioPlayer and SLPresetReverbItf on OutputMix.\n");
     fprintf(stdout, "Plays the sound file designated by the given path, ");
     fprintf(stdout, "and sends a specified amount of energy to a global reverb\n");
     fprintf(stdout, "(sendLevel in mB), with a given direct level (in mB).\n");
     fprintf(stdout, "Every %d seconds, the reverb is turned on and off,\n",
             TIME_S_BETWEEN_SETTING_CHANGE);
     fprintf(stdout, "unless the --always-on option is specified before the path.\n");

     bool alwaysOn = false;
     bool useFd = false;
     bool loop = false;
     int i;
     for (i = 1; i < argc; ++i) {
         const char *arg = argv[i];
         if (arg[0] != '-')
             break;
         if (!strcmp(arg, "--always-on")) {
             alwaysOn = true;
         } else if (!strcmp(arg, "--fd")) {
             useFd = true;
         } else if (!strcmp(arg, "--loop")) {
             loop = true;
         } else {
             fprintf(stderr, "unknown option %s ignored\n", arg);
         }
     }

     if (argc - i != 4) {
         fprintf(stdout, "Usage: \t%s [--always-on] [--fd] [--loop] path preset directLevel "
                 "sendLevel\n", programName);
         fprintf(stdout, "Example: \"%s /sdcard/my.mp3 6 -2000 0\" \n", programName);
         exit(EXIT_FAILURE);
     }

     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, argv[i], atoi(argv[i+1]), (SLmillibel)atoi(argv[i+2]),
             (SLmillibel)atoi(argv[i+3]), alwaysOn, useFd, loop);

     /* Shutdown OpenSL ES */
     (*sl)->Destroy(sl);

     return EXIT_SUCCESS;
 }
	/*
	* 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.
	*/

	#include <assert.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	#include <unistd.h>
	#include <sys/time.h>
	#include <fcntl.h>

	#include <SLES/OpenSLES.h>
	#ifdef ANDROID
	#include <SLES/OpenSLES_Android.h>
	#endif


	#define MAX_NUMBER_INTERFACES 4

	#define TIME_S_BETWEEN_SETTING_CHANGE 3

	//-----------------------------------------------------------------
	/* Exits the application if an error is encountered */
	#define ExitOnError(x) ExitOnErrorFunc(x,__LINE__)

	void ExitOnErrorFunc( SLresult result , int line)
	{
	if (SL_RESULT_SUCCESS != result) {
	fprintf(stderr, "%u error code encountered at line %d, exiting\n", 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);

	/* Initialize arrays required[] and iidArray[] */
	for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
	required[i] = SL_BOOLEAN_FALSE;
	iidArray[i] = SL_IID_NULL;
	}

	/* ------------------------------------------------------ */
	/* Configuration of the output mix */

	/* Set arrays required[] and iidArray[] for required interfaces */
	required[0] = SL_BOOLEAN_TRUE;
	iidArray[0] = SL_IID_PRESETREVERB;

	/* Create Output Mix object to be used by the player */
	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 */
	locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
	locator_outputmix.outputMix = outputMix;
	audioSink.pLocator = (void*)&locator_outputmix;
	audioSink.pFormat = NULL;

	/* Select the reverb preset */
	fprintf(stdout, "\nUsing preset ");
	switch(preset) {
	case SL_REVERBPRESET_NONE:
	fprintf(stdout, "SL_REVERBPRESET_NONE, don't expect to hear reverb\n");
	break;
	case SL_REVERBPRESET_SMALLROOM: fprintf(stdout, "SL_REVERBPRESET_SMALLROOM\n"); break;
	case SL_REVERBPRESET_MEDIUMROOM: fprintf(stdout, "SL_REVERBPRESET_MEDIUMROOM\n"); break;
	case SL_REVERBPRESET_LARGEROOM: fprintf(stdout, "SL_REVERBPRESET_LARGEROOM\n"); break;
	case SL_REVERBPRESET_MEDIUMHALL: fprintf(stdout, "SL_REVERBPRESET_MEDIUMHALL\n"); break;
	case SL_REVERBPRESET_LARGEHALL: fprintf(stdout, "SL_REVERBPRESET_LARGEHALL\n"); break;
	case SL_REVERBPRESET_PLATE: fprintf(stdout, "SL_REVERBPRESET_PLATE\n"); break;
	default:
	fprintf(stdout, "unknown, use at your own risk\n"); break;
	}
	result = (*reverbItf)->SetPreset(reverbItf, preset);
	ExitOnError(result);

	/* ------------------------------------------------------ */
	/* Configuration of the 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;

	locatorUri.locatorType = SL_DATALOCATOR_URI;
	locatorUri.URI = (SLchar *) path;
	audioSource.pLocator = (void*)&locatorUri;
	if (useFd) {
	#ifdef ANDROID
	/* 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;
	#else
	fprintf(stderr, "option --fd is not supported\n");
	#endif
	}

	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 */
	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);
	fprintf(stdout, "URI example: after Realize\n");

	/* 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);

	fprintf(stdout, "Player configured\n");

	/* ------------------------------------------------------ */
	/* 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) {
	fprintf(stderr, "Error during prefetch, exiting\n");
	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) {
	printf("Duration unknown, assuming 10 seconds\n");
	durationInMsec = 10000;
	} else {
	printf("Duration is %.1f seconds\n", 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);
	fprintf(stdout, "Set direct level to %dmB\n", directLevel);

	result = (*effectSendItf)->SetSendLevel(effectSendItf, reverbItf, sendLevel);
	ExitOnError(result);
	fprintf(stdout, "Set send level to %dmB\n", sendLevel);

	/* Enable looping */
	if (loop) {
	result = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, (SLmillisecond) 0, SL_TIME_UNKNOWN);
	ExitOnError(result);
	}

	/* 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);
	fprintf(stdout, "SetPreset(%d)=%d\n", enabled ? preset : SL_REVERBPRESET_NONE, result);
	ExitOnError(result);
	previousEnabled = enabled;
	if (enabled) {
	fprintf(stdout, "Reverb on\n");
	} else {
	fprintf(stdout, "Reverb off\n");
	}
	}
	usleep(TIME_S_BETWEEN_SETTING_CHANGE * 1000 * 1000);
	}

	/* Make sure player is stopped */
	assert(playState == SL_PLAYSTATE_STOPPED);
	#if 0
	fprintf(stdout, "Stopping playback\n");
	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
	}

	//-----------------------------------------------------------------
	int main(int argc, char* const argv[])
	{
	const char *programName = argv[0];
	SLresult result;
	SLObjectItf sl;

	fprintf(stdout, "OpenSL ES test %s: exercises SLEffectSendItf ", programName);
	fprintf(stdout, "on AudioPlayer and SLPresetReverbItf on OutputMix.\n");
	fprintf(stdout, "Plays the sound file designated by the given path, ");
	fprintf(stdout, "and sends a specified amount of energy to a global reverb\n");
	fprintf(stdout, "(sendLevel in mB), with a given direct level (in mB).\n");
	fprintf(stdout, "Every %d seconds, the reverb is turned on and off,\n",
	TIME_S_BETWEEN_SETTING_CHANGE);
	fprintf(stdout, "unless the --always-on option is specified before the path.\n");

	bool alwaysOn = false;
	bool useFd = false;
	bool loop = false;
	int i;
	for (i = 1; i < argc; ++i) {
	const char *arg = argv[i];
	if (arg[0] != '-')
	break;
	if (!strcmp(arg, "--always-on")) {
	alwaysOn = true;
	} else if (!strcmp(arg, "--fd")) {
	useFd = true;
	} else if (!strcmp(arg, "--loop")) {
	loop = true;
	} else {
	fprintf(stderr, "unknown option %s ignored\n", arg);
	}
	}

	if (argc - i != 4) {
	fprintf(stdout, "Usage: \t%s [--always-on] [--fd] [--loop] path preset directLevel "
	"sendLevel\n", programName);
	fprintf(stdout, "Example: \"%s /sdcard/my.mp3 6 -2000 0\" \n", programName);
	exit(EXIT_FAILURE);
	}

	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, argv[i], atoi(argv[i+1]), (SLmillibel)atoi(argv[i+2]),
	(SLmillibel)atoi(argv[i+3]), alwaysOn, useFd, loop);

	/* Shutdown OpenSL ES */
	(*sl)->Destroy(sl);

	return EXIT_SUCCESS;
	}