tests/mimeUri/slesTestSlowDownUri.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 <pthread.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/time.h>

 #include <SLES/OpenSLES.h>


 #define MAX_NUMBER_INTERFACES 3

 #define REPETITIONS 4  // 4 repetitions, but will stop the looping before the end

 #define INITIAL_RATE 2000 // 2x normal playback speed

 // These are extensions to OpenSL ES 1.0.1 values

 #define SL_PREFETCHSTATUS_UNKNOWN 0
 #define SL_PREFETCHSTATUS_ERROR   (-1)

 // Mutex and condition shared with main program to protect prefetch_status

 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
 SLuint32 prefetch_status = SL_PREFETCHSTATUS_UNKNOWN;

 /* used to detect errors likely to have occured when the OpenSL ES framework fails to open
  * a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond.
  */
 #define PREFETCHEVENT_ERROR_CANDIDATE \
         (SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)

 //-----------------------------------------------------------------
 //* Exits the application if an error is encountered */
 #define CheckErr(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);
     }
 }

 //-----------------------------------------------------------------
 /* PlayItf callback for an audio player */
 void PlayEventCallback( SLPlayItf caller,  void *pContext, SLuint32 event)
 {
     fprintf(stdout, "PlayEventCallback event = ");
     if (event & SL_PLAYEVENT_HEADATEND) {
         fprintf(stdout, "SL_PLAYEVENT_HEADATEND \n");
         /* slow playback down by 2x for next loop,  if possible */
         SLpermille minRate, maxRate, stepSize, rate = 1000;
         SLuint32 capa;
         assert(NULL != pContext);
         SLPlaybackRateItf pRateItf = (SLPlaybackRateItf)pContext;
         SLresult res = (*pRateItf)->GetRate(pRateItf, &rate); CheckErr(res);
         res = (*pRateItf)->GetRateRange(pRateItf, 0, &minRate, &maxRate, &stepSize, &capa);
         CheckErr(res);
         fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate);
         rate /= 2;
         if (rate < minRate) {
             rate = minRate;
         }
         fprintf(stdout, "new rate = %d\n", rate);
         res = (*pRateItf)->SetRate(pRateItf, rate); CheckErr(res);
         if (res == SL_RESULT_FEATURE_UNSUPPORTED) {
             fprintf(stderr, "new playback rate %d per mille is unsupported\n", rate);
         } else {
             CheckErr(res);
         }
     }
     if (event & SL_PLAYEVENT_HEADATMARKER) {
         fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER ");
     }
     if (event & SL_PLAYEVENT_HEADATNEWPOS) {
         fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS ");
     }
     if (event & SL_PLAYEVENT_HEADMOVING) {
         fprintf(stdout, "SL_PLAYEVENT_HEADMOVING ");
     }
     if (event & SL_PLAYEVENT_HEADSTALLED) {
         fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED");
     }
     fprintf(stdout, "\n");
 }

 //-----------------------------------------------------------------
 /* PrefetchStatusItf callback for an audio player */
 void PrefetchEventCallback( SLPrefetchStatusItf caller,  void *pContext, SLuint32 event)
 {
     //fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event);
     SLresult result;
     assert(pContext == NULL);
     SLpermille level = 0;
     result = (*caller)->GetFillLevel(caller, &level);
     CheckErr(result);
     SLuint32 status;
     result = (*caller)->GetPrefetchStatus(caller, &status);
     CheckErr(result);
     if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
         fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
     }
     if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
         fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status);
     }
     SLuint32 new_prefetch_status;
     if ((event & PREFETCHEVENT_ERROR_CANDIDATE) == PREFETCHEVENT_ERROR_CANDIDATE
             && level == 0 && status == SL_PREFETCHSTATUS_UNDERFLOW) {
         fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
         new_prefetch_status = SL_PREFETCHSTATUS_ERROR;
     } else if (event == SL_PREFETCHEVENT_STATUSCHANGE &&
             status == SL_PREFETCHSTATUS_SUFFICIENTDATA) {
         new_prefetch_status = status;
     } else {
         return;
     }
     int ok;
     ok = pthread_mutex_lock(&mutex);
     assert(ok == 0);
     prefetch_status = new_prefetch_status;
     ok = pthread_cond_signal(&cond);
     assert(ok == 0);
     ok = pthread_mutex_unlock(&mutex);
     assert(ok == 0);
 }

 // Display rate capabilities in a nicely formatted way

 void printCapabilities(SLuint32 capabilities)
 {
     bool needBar = false;
     printf("0x%x (", capabilities);
 #define _(x)                             \
     if (capabilities & SL_RATEPROP_##x) { \
         if (needBar)                     \
             printf("|");                 \
         printf("SL_RATEPROP_" #x);        \
         needBar = true;                  \
         capabilities &= ~SL_RATEPROP_##x; \
     }
     _(SILENTAUDIO)
     _(STAGGEREDAUDIO)
     _(NOPITCHCORAUDIO)
     _(PITCHCORAUDIO)
     if (capabilities != 0) {
         if (needBar)
             printf("|");
         printf("0x%x", capabilities);
         needBar = true;
     }
     if (!needBar)
         printf("N/A");
     printf(")");
 }

 //-----------------------------------------------------------------

 /* Play some music from a URI  */
 void TestSlowDownUri( SLObjectItf sl, const char* path)
 {
     SLEngineItf                EngineItf;

     SLint32                    numOutputs = 0;
     SLuint32                   deviceID = 0;

     SLresult                   res;

     SLDataSource               audioSource;
     SLDataLocator_URI          uri;
     SLDataFormat_MIME          mime;

     SLDataSink                 audioSink;
     SLDataLocator_OutputMix    locator_outputmix;

     SLObjectItf                player;
     SLPlayItf                  playItf;
     SLSeekItf                  seekItf;
     SLPrefetchStatusItf        prefetchItf;
     SLPlaybackRateItf          rateItf;

     SLObjectItf                OutputMix;

     SLboolean required[MAX_NUMBER_INTERFACES];
     SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];

     /* Get the SL Engine Interface which is implicit */
     res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);   CheckErr(res);

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

     required[0] = SL_BOOLEAN_TRUE;
     iidArray[0] = SL_IID_VOLUME;
     // Create Output Mix object to be used by player
     res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
             iidArray, required);  CheckErr(res);

     // Realizing the Output Mix object in synchronous mode.
     res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE);  CheckErr(res);

     /* Setup the data source structure for the URI */
     uri.locatorType = SL_DATALOCATOR_URI;
     uri.URI         =  (SLchar*) path;
     mime.formatType    = SL_DATAFORMAT_MIME;
     mime.mimeType      = (SLchar*)NULL;
     mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;

     audioSource.pFormat  = (void *)&mime;
     audioSource.pLocator = (void *)&uri;

     /* Setup the data sink structure */
     locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
     locator_outputmix.outputMix   = OutputMix;
     audioSink.pLocator            = (void *)&locator_outputmix;
     audioSink.pFormat             = NULL;

     /******************************************************/
     /* Create the audio player */
     required[0] = SL_BOOLEAN_TRUE;
     iidArray[0] = SL_IID_SEEK;
     required[1] = SL_BOOLEAN_TRUE;
     iidArray[1] = SL_IID_PREFETCHSTATUS;
     required[2] = SL_BOOLEAN_TRUE;
     iidArray[2] = SL_IID_PLAYBACKRATE;
     res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
             MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);

     /* Realizing the player in synchronous mode. */
     res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
     fprintf(stdout, "URI example: after Realize\n");

     /* Get interfaces */
     res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf);  CheckErr(res);

     res = (*player)->GetInterface(player, SL_IID_SEEK,  (void*)&seekItf);  CheckErr(res);

     res = (*player)->GetInterface(player, SL_IID_PLAYBACKRATE, (void*)&rateItf);  CheckErr(res);

     res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
     CheckErr(res);
     res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL);
     CheckErr(res);
     res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
             SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE);  CheckErr(res);

     /* Configure fill level updates every 5 percent */
     (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50);  CheckErr(res);

     /* Display duration */
     SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
     res = (*playItf)->GetDuration(playItf, &durationInMsec);  CheckErr(res);
     if (durationInMsec == SL_TIME_UNKNOWN) {
         fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
     } else {
         fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n",
                 durationInMsec);
     }

     /* Loop on the whole of the content */
     res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN);  CheckErr(res);

     /* Set up marker and position callbacks */
     res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, (void *) rateItf);
             CheckErr(res);
     res = (*playItf)->SetCallbackEventsMask(playItf,
             SL_PLAYEVENT_HEADATEND | SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS);
     res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res);
     res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res);

     /* Get the default rate */
     SLpermille rate = 1234;
     res = (*rateItf)->GetRate(rateItf, &rate); CheckErr(res);
     printf("default rate = %d per mille\n", rate);
     assert(1000 == rate);

     /* Get the default rate properties */
     SLuint32 properties = 0;
     res = (*rateItf)->GetProperties(rateItf, &properties); CheckErr(res);
     printf("default rate properties: ");
     printCapabilities(properties);
     printf("\n");
     assert(SL_RATEPROP_NOPITCHCORAUDIO == properties);

     /* Get all supported playback rate ranges */
     SLuint8 index;
     for (index = 0; ; ++index) {
         SLpermille minRate, maxRate, stepSize;
         SLuint32 capabilities;
         res = (*rateItf)->GetRateRange(rateItf, index, &minRate, &maxRate, &stepSize,
                 &capabilities);
         if (res == SL_RESULT_PARAMETER_INVALID) {
             if (index == 0) {
                 fprintf(stderr, "implementation supports no rate ranges\n");
             }
             break;
         }
         CheckErr(res);
         if (index == 255) {
             fprintf(stderr, "implementation supports way too many rate ranges, I'm giving up\n");
             break;
         }
         printf("range[%u]: min=%d, max=%d, capabilities=", index, minRate, maxRate);
         printCapabilities(capabilities);
         printf("\n");
     }

     /* Change the playback rate before playback */
     res = (*rateItf)->SetRate(rateItf, INITIAL_RATE);
     if (res == SL_RESULT_FEATURE_UNSUPPORTED || res == SL_RESULT_PARAMETER_INVALID) {
         fprintf(stderr, "initial playback rate %d per mille is unsupported\n", INITIAL_RATE);
     } else {
         CheckErr(res);
     }

     /******************************************************/
     /* Play the URI */
     /*     first cause the player to prefetch the data */
     res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res);

     // wait for prefetch status callback to indicate either sufficient data or error
     pthread_mutex_lock(&mutex);
     while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) {
         pthread_cond_wait(&cond, &mutex);
     }
     pthread_mutex_unlock(&mutex);
     if (prefetch_status == SL_PREFETCHSTATUS_ERROR) {
         fprintf(stderr, "Error during prefetch, exiting\n");
         goto destroyRes;
     }

     /* Display duration again, */
     res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res);
     if (durationInMsec == SL_TIME_UNKNOWN) {
         fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
     } else {
         fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
     }

     /* Start playing */
     fprintf(stdout, "starting to play\n");
     res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res);

     /* Wait as long as the duration of the content, times the repetitions,
      * before stopping the loop */
 #if 1
     usleep( (REPETITIONS-1) * durationInMsec * 1100);
 #else
     int ii;
     for (ii = 0; ii < REPETITIONS; ++ii) {
         usleep(durationInMsec * 1100);
         PlayEventCallback(playItf, (void *) rateItf, SL_PLAYEVENT_HEADATEND);
     }
 #endif

     res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN); CheckErr(res);
     fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
     /* wait some more to make sure it doesn't repeat */
     usleep(durationInMsec * 1000);

     /* Stop playback */
     fprintf(stdout, "stopping playback\n");
     res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); CheckErr(res);

 destroyRes:

     /* Destroy the player */
     (*player)->Destroy(player);

     /* Destroy Output Mix object */
     (*OutputMix)->Destroy(OutputMix);
 }

 //-----------------------------------------------------------------
 int main(int argc, char* const argv[])
 {
     SLresult    res;
     SLObjectItf sl;

     fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf, SLPlaybackRateItf\n",
             argv[0]);
     fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
     fprintf(stdout, "Plays a sound and loops it %d times while changing the \n", REPETITIONS);
     fprintf(stdout, "playback rate each time.\n\n");

     if (argc == 1) {
         fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]);
         fprintf(stdout, "Example: \"%s /sdcard/my.mp3\"  or \"%s file:///sdcard/my.mp3\"\n",
                 argv[0], argv[0]);
         return EXIT_FAILURE;
     }

     SLEngineOption EngineOption[] = {
             {(SLuint32) SL_ENGINEOPTION_THREADSAFE,
             (SLuint32) SL_BOOLEAN_TRUE}};

     res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
     CheckErr(res);
     /* Realizing the SL Engine in synchronous mode. */
     res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
     CheckErr(res);

     TestSlowDownUri(sl, argv[1]);

     /* 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 <pthread.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	#include <unistd.h>
	#include <sys/time.h>

	#include <SLES/OpenSLES.h>


	#define MAX_NUMBER_INTERFACES 3

	#define REPETITIONS 4 // 4 repetitions, but will stop the looping before the end

	#define INITIAL_RATE 2000 // 2x normal playback speed

	// These are extensions to OpenSL ES 1.0.1 values

	#define SL_PREFETCHSTATUS_UNKNOWN 0
	#define SL_PREFETCHSTATUS_ERROR (-1)

	// Mutex and condition shared with main program to protect prefetch_status

	static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
	static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
	SLuint32 prefetch_status = SL_PREFETCHSTATUS_UNKNOWN;

	/* used to detect errors likely to have occured when the OpenSL ES framework fails to open
	* a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond.
	*/
	#define PREFETCHEVENT_ERROR_CANDIDATE \
	(SL_PREFETCHEVENT_STATUSCHANGE \| SL_PREFETCHEVENT_FILLLEVELCHANGE)

	//-----------------------------------------------------------------
	//* Exits the application if an error is encountered */
	#define CheckErr(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);
	}
	}

	//-----------------------------------------------------------------
	/* PlayItf callback for an audio player */
	void PlayEventCallback( SLPlayItf caller, void *pContext, SLuint32 event)
	{
	fprintf(stdout, "PlayEventCallback event = ");
	if (event & SL_PLAYEVENT_HEADATEND) {
	fprintf(stdout, "SL_PLAYEVENT_HEADATEND \n");
	/* slow playback down by 2x for next loop, if possible */
	SLpermille minRate, maxRate, stepSize, rate = 1000;
	SLuint32 capa;
	assert(NULL != pContext);
	SLPlaybackRateItf pRateItf = (SLPlaybackRateItf)pContext;
	SLresult res = (*pRateItf)->GetRate(pRateItf, &rate); CheckErr(res);
	res = (*pRateItf)->GetRateRange(pRateItf, 0, &minRate, &maxRate, &stepSize, &capa);
	CheckErr(res);
	fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate);
	rate /= 2;
	if (rate < minRate) {
	rate = minRate;
	}
	fprintf(stdout, "new rate = %d\n", rate);
	res = (*pRateItf)->SetRate(pRateItf, rate); CheckErr(res);
	if (res == SL_RESULT_FEATURE_UNSUPPORTED) {
	fprintf(stderr, "new playback rate %d per mille is unsupported\n", rate);
	} else {
	CheckErr(res);
	}
	}
	if (event & SL_PLAYEVENT_HEADATMARKER) {
	fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER ");
	}
	if (event & SL_PLAYEVENT_HEADATNEWPOS) {
	fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS ");
	}
	if (event & SL_PLAYEVENT_HEADMOVING) {
	fprintf(stdout, "SL_PLAYEVENT_HEADMOVING ");
	}
	if (event & SL_PLAYEVENT_HEADSTALLED) {
	fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED");
	}
	fprintf(stdout, "\n");
	}

	//-----------------------------------------------------------------
	/* PrefetchStatusItf callback for an audio player */
	void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event)
	{
	//fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event);
	SLresult result;
	assert(pContext == NULL);
	SLpermille level = 0;
	result = (*caller)->GetFillLevel(caller, &level);
	CheckErr(result);
	SLuint32 status;
	result = (*caller)->GetPrefetchStatus(caller, &status);
	CheckErr(result);
	if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
	fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
	}
	if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
	fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status);
	}
	SLuint32 new_prefetch_status;
	if ((event & PREFETCHEVENT_ERROR_CANDIDATE) == PREFETCHEVENT_ERROR_CANDIDATE
	&& level == 0 && status == SL_PREFETCHSTATUS_UNDERFLOW) {
	fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
	new_prefetch_status = SL_PREFETCHSTATUS_ERROR;
	} else if (event == SL_PREFETCHEVENT_STATUSCHANGE &&
	status == SL_PREFETCHSTATUS_SUFFICIENTDATA) {
	new_prefetch_status = status;
	} else {
	return;
	}
	int ok;
	ok = pthread_mutex_lock(&mutex);
	assert(ok == 0);
	prefetch_status = new_prefetch_status;
	ok = pthread_cond_signal(&cond);
	assert(ok == 0);
	ok = pthread_mutex_unlock(&mutex);
	assert(ok == 0);
	}

	// Display rate capabilities in a nicely formatted way

	void printCapabilities(SLuint32 capabilities)
	{
	bool needBar = false;
	printf("0x%x (", capabilities);
	#define _(x) \
	if (capabilities & SL_RATEPROP_##x) { \
	if (needBar) \
	printf("\|"); \
	printf("SL_RATEPROP_" #x); \
	needBar = true; \
	capabilities &= ~SL_RATEPROP_##x; \
	}
	_(SILENTAUDIO)
	_(STAGGEREDAUDIO)
	_(NOPITCHCORAUDIO)
	_(PITCHCORAUDIO)
	if (capabilities != 0) {
	if (needBar)
	printf("\|");
	printf("0x%x", capabilities);
	needBar = true;
	}
	if (!needBar)
	printf("N/A");
	printf(")");
	}

	//-----------------------------------------------------------------

	/* Play some music from a URI */
	void TestSlowDownUri( SLObjectItf sl, const char* path)
	{
	SLEngineItf EngineItf;

	SLint32 numOutputs = 0;
	SLuint32 deviceID = 0;

	SLresult res;

	SLDataSource audioSource;
	SLDataLocator_URI uri;
	SLDataFormat_MIME mime;

	SLDataSink audioSink;
	SLDataLocator_OutputMix locator_outputmix;

	SLObjectItf player;
	SLPlayItf playItf;
	SLSeekItf seekItf;
	SLPrefetchStatusItf prefetchItf;
	SLPlaybackRateItf rateItf;

	SLObjectItf OutputMix;

	SLboolean required[MAX_NUMBER_INTERFACES];
	SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];

	/* Get the SL Engine Interface which is implicit */
	res = (sl)->GetInterface(sl, SL_IID_ENGINE, (void)&EngineItf); CheckErr(res);

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

	required[0] = SL_BOOLEAN_TRUE;
	iidArray[0] = SL_IID_VOLUME;
	// Create Output Mix object to be used by player
	res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
	iidArray, required); CheckErr(res);

	// Realizing the Output Mix object in synchronous mode.
	res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE); CheckErr(res);

	/* Setup the data source structure for the URI */
	uri.locatorType = SL_DATALOCATOR_URI;
	uri.URI = (SLchar*) path;
	mime.formatType = SL_DATAFORMAT_MIME;
	mime.mimeType = (SLchar*)NULL;
	mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;

	audioSource.pFormat = (void *)&mime;
	audioSource.pLocator = (void *)&uri;

	/* Setup the data sink structure */
	locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
	locator_outputmix.outputMix = OutputMix;
	audioSink.pLocator = (void *)&locator_outputmix;
	audioSink.pFormat = NULL;

	/******************************************************/
	/* Create the audio player */
	required[0] = SL_BOOLEAN_TRUE;
	iidArray[0] = SL_IID_SEEK;
	required[1] = SL_BOOLEAN_TRUE;
	iidArray[1] = SL_IID_PREFETCHSTATUS;
	required[2] = SL_BOOLEAN_TRUE;
	iidArray[2] = SL_IID_PLAYBACKRATE;
	res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
	MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);

	/* Realizing the player in synchronous mode. */
	res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
	fprintf(stdout, "URI example: after Realize\n");

	/* Get interfaces */
	res = (player)->GetInterface(player, SL_IID_PLAY, (void)&playItf); CheckErr(res);

	res = (player)->GetInterface(player, SL_IID_SEEK, (void)&seekItf); CheckErr(res);

	res = (player)->GetInterface(player, SL_IID_PLAYBACKRATE, (void)&rateItf); CheckErr(res);

	res = (player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void)&prefetchItf);
	CheckErr(res);
	res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL);
	CheckErr(res);
	res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
	SL_PREFETCHEVENT_FILLLEVELCHANGE \| SL_PREFETCHEVENT_STATUSCHANGE); CheckErr(res);

	/* Configure fill level updates every 5 percent */
	(*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50); CheckErr(res);

	/* Display duration */
	SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
	res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res);
	if (durationInMsec == SL_TIME_UNKNOWN) {
	fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
	} else {
	fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n",
	durationInMsec);
	}

	/* Loop on the whole of the content */
	res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN); CheckErr(res);

	/* Set up marker and position callbacks */
	res = (playItf)->RegisterCallback(playItf, PlayEventCallback, (void ) rateItf);
	CheckErr(res);
	res = (*playItf)->SetCallbackEventsMask(playItf,
	SL_PLAYEVENT_HEADATEND \| SL_PLAYEVENT_HEADATMARKER \| SL_PLAYEVENT_HEADATNEWPOS);
	res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res);
	res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res);

	/* Get the default rate */
	SLpermille rate = 1234;
	res = (*rateItf)->GetRate(rateItf, &rate); CheckErr(res);
	printf("default rate = %d per mille\n", rate);
	assert(1000 == rate);

	/* Get the default rate properties */
	SLuint32 properties = 0;
	res = (*rateItf)->GetProperties(rateItf, &properties); CheckErr(res);
	printf("default rate properties: ");
	printCapabilities(properties);
	printf("\n");
	assert(SL_RATEPROP_NOPITCHCORAUDIO == properties);

	/* Get all supported playback rate ranges */
	SLuint8 index;
	for (index = 0; ; ++index) {
	SLpermille minRate, maxRate, stepSize;
	SLuint32 capabilities;
	res = (*rateItf)->GetRateRange(rateItf, index, &minRate, &maxRate, &stepSize,
	&capabilities);
	if (res == SL_RESULT_PARAMETER_INVALID) {
	if (index == 0) {
	fprintf(stderr, "implementation supports no rate ranges\n");
	}
	break;
	}
	CheckErr(res);
	if (index == 255) {
	fprintf(stderr, "implementation supports way too many rate ranges, I'm giving up\n");
	break;
	}
	printf("range[%u]: min=%d, max=%d, capabilities=", index, minRate, maxRate);
	printCapabilities(capabilities);
	printf("\n");
	}

	/* Change the playback rate before playback */
	res = (*rateItf)->SetRate(rateItf, INITIAL_RATE);
	if (res == SL_RESULT_FEATURE_UNSUPPORTED \|\| res == SL_RESULT_PARAMETER_INVALID) {
	fprintf(stderr, "initial playback rate %d per mille is unsupported\n", INITIAL_RATE);
	} else {
	CheckErr(res);
	}

	/******************************************************/
	/* Play the URI */
	/* first cause the player to prefetch the data */
	res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res);

	// wait for prefetch status callback to indicate either sufficient data or error
	pthread_mutex_lock(&mutex);
	while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) {
	pthread_cond_wait(&cond, &mutex);
	}
	pthread_mutex_unlock(&mutex);
	if (prefetch_status == SL_PREFETCHSTATUS_ERROR) {
	fprintf(stderr, "Error during prefetch, exiting\n");
	goto destroyRes;
	}

	/* Display duration again, */
	res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res);
	if (durationInMsec == SL_TIME_UNKNOWN) {
	fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
	} else {
	fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
	}

	/* Start playing */
	fprintf(stdout, "starting to play\n");
	res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res);

	/* Wait as long as the duration of the content, times the repetitions,
	* before stopping the loop */
	#if 1
	usleep( (REPETITIONS-1) * durationInMsec * 1100);
	#else
	int ii;
	for (ii = 0; ii < REPETITIONS; ++ii) {
	usleep(durationInMsec * 1100);
	PlayEventCallback(playItf, (void *) rateItf, SL_PLAYEVENT_HEADATEND);
	}
	#endif

	res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN); CheckErr(res);
	fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
	/* wait some more to make sure it doesn't repeat */
	usleep(durationInMsec * 1000);

	/* Stop playback */
	fprintf(stdout, "stopping playback\n");
	res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); CheckErr(res);

	destroyRes:

	/* Destroy the player */
	(*player)->Destroy(player);

	/* Destroy Output Mix object */
	(*OutputMix)->Destroy(OutputMix);
	}

	//-----------------------------------------------------------------
	int main(int argc, char* const argv[])
	{
	SLresult res;
	SLObjectItf sl;

	fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf, SLPlaybackRateItf\n",
	argv[0]);
	fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
	fprintf(stdout, "Plays a sound and loops it %d times while changing the \n", REPETITIONS);
	fprintf(stdout, "playback rate each time.\n\n");

	if (argc == 1) {
	fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]);
	fprintf(stdout, "Example: \"%s /sdcard/my.mp3\" or \"%s file:///sdcard/my.mp3\"\n",
	argv[0], argv[0]);
	return EXIT_FAILURE;
	}

	SLEngineOption EngineOption[] = {
	{(SLuint32) SL_ENGINEOPTION_THREADSAFE,
	(SLuint32) SL_BOOLEAN_TRUE}};

	res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
	CheckErr(res);
	/* Realizing the SL Engine in synchronous mode. */
	res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
	CheckErr(res);

	TestSlowDownUri(sl, argv[1]);

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

	return EXIT_SUCCESS;
	}