/*
* Copyright (C) 2011 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 <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <utils/threads.h>
#include <SLES/OpenSLES.h>
/* tolerance in ms for this test in time difference between reported position and time since
* playback was requested to start. This is reasonable for a local file.
*/
#define TIME_TOLERANCE_MS 600
/* explicitly requesting SL_IID_VOLUME and SL_IID_PREFETCHSTATUS
* on the AudioPlayer object */
#define NUM_EXPLICIT_INTERFACES_FOR_PLAYER 2
/* 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)
/* to signal to the test app the end of the stream to decode has been reached */
bool eos = false;
android::Mutex eosLock;
android::Condition eosCondition;
//-----------------------------------------------------------------
//* 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);
}
}
bool prefetchError = false;
//-----------------------------------------------------------------
void SignalEos() {
android::Mutex::Autolock autoLock(eosLock);
eos = true;
eosCondition.signal();
}
//-----------------------------------------------------------------
/* PrefetchStatusItf callback for an audio player */
void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event)
{
SLpermille level = 0;
SLresult res = (*caller)->GetFillLevel(caller, &level); CheckErr(res);
SLuint32 status;
//fprintf(stdout, "PrefetchEventCallback: received event %u\n", event);
res = (*caller)->GetPrefetchStatus(caller, &status); CheckErr(res);
if ((PREFETCHEVENT_ERROR_CANDIDATE == (event & PREFETCHEVENT_ERROR_CANDIDATE))
&& (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) {
fprintf(stdout, "PrefetchEventCallback: Error while prefetching data, exiting\n");
prefetchError = true;
return;
}
if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
fprintf(stdout, "PrefetchEventCallback: Buffer fill level is = %d\n", level);
}
if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
fprintf(stdout, "PrefetchEventCallback: Prefetch Status is = %u\n", status);
}
}
//-----------------------------------------------------------------
/* PlayItf callback for playback events */
void PlayEventCallback(
SLPlayItf caller,
void *pContext,
SLuint32 event)
{
SLmillisecond posMsec = SL_TIME_UNKNOWN;
SLresult res;
if (SL_PLAYEVENT_HEADATEND & event) {
fprintf(stdout, "SL_PLAYEVENT_HEADATEND reached\n");
#if 0
res = (*caller)->GetPosition(caller, &posMsec); CheckErr(res);
fprintf(stdout, "after getPosition in SL_PLAYEVENT_HEADATEND handler\n");
if (posMsec == SL_TIME_UNKNOWN) {
fprintf(stderr, "Error: position is SL_TIME_UNKNOWN at SL_PLAYEVENT_HEADATEND\n");
} else {
fprintf(stdout, "position is %d at SL_PLAYEVENT_HEADATEND\n", posMsec);
}
// FIXME compare position against duration
#endif
SignalEos();
}
if (SL_PLAYEVENT_HEADATNEWPOS & event) {
res = (*caller)->GetPosition(caller, &posMsec); CheckErr(res);
fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS current position=%ums\n", posMsec);
}
if (SL_PLAYEVENT_HEADATMARKER & event) {
res = (*caller)->GetPosition(caller, &posMsec); CheckErr(res);
fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER current position=%ums\n", posMsec);
}
}
//-----------------------------------------------------------------
/* Play some audio from a URI and regularly query the position */
void TestGetPositionUri( 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;
SLVolumeItf volItf;
SLPrefetchStatusItf prefetchItf;
SLObjectItf OutputMix;
/* variables for the duration and position tests */
SLuint16 counter = 0;
SLmillisecond posInMsec = SL_TIME_UNKNOWN;
SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
SLboolean required[NUM_EXPLICIT_INTERFACES_FOR_PLAYER];
SLInterfaceID iidArray[NUM_EXPLICIT_INTERFACES_FOR_PLAYER];
/* 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 < NUM_EXPLICIT_INTERFACES_FOR_PLAYER ; i++) {
required[i] = SL_BOOLEAN_FALSE;
iidArray[i] = SL_IID_NULL;
}
// Set arrays required[] and iidArray[] for VOLUME and PREFETCHSTATUS interface
required[0] = SL_BOOLEAN_TRUE;
iidArray[0] = SL_IID_VOLUME;
required[1] = SL_BOOLEAN_TRUE;
iidArray[1] = SL_IID_PREFETCHSTATUS;
// 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 */
res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
NUM_EXPLICIT_INTERFACES_FOR_PLAYER, 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_VOLUME, (void*)&volItf);
CheckErr(res);
res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
CheckErr(res);
res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, &prefetchItf);
CheckErr(res);
res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE);
CheckErr(res);
/* Configure fill level updates every 5 percent */
res = (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50); CheckErr(res);
/* Set up the player callback to get events during the decoding */
res = (*playItf)->SetMarkerPosition(playItf, 2000);
CheckErr(res);
res = (*playItf)->SetPositionUpdatePeriod(playItf, 500);
CheckErr(res);
res = (*playItf)->SetCallbackEventsMask(playItf,
SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS | SL_PLAYEVENT_HEADATEND);
CheckErr(res);
res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, NULL);
CheckErr(res);
/* Set the player volume */
res = (*volItf)->SetVolumeLevel( volItf, -300);
CheckErr(res);
/* Play the URI */
/* first cause the player to prefetch the data */
fprintf(stdout, "Setting the player to PAUSED to cause it to prefetch the data\n");
res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res);
usleep(100 * 1000);
/* wait until there's data to play */
SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
SLuint32 timeOutIndex = 100; // 10s
while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0) &&
!prefetchError) {
usleep(100 * 1000);
(*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
timeOutIndex--;
}
if (timeOutIndex == 0 || prefetchError) {
fprintf(stderr, "We're done waiting, failed to prefetch data in time, exiting\n");
goto destroyRes;
}
/* Display duration */
res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res);
if (durationInMsec == SL_TIME_UNKNOWN) {
fprintf(stderr, "Error: Content duration is unknown after prefetch completed, exiting\n");
goto destroyRes;
} else {
fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
}
fprintf(stdout, "Setting the player to PLAYING\n");
res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res);
/* Test GetPosition every second */
while ((counter*1000) < durationInMsec) {
counter++;
usleep(1 * 1000 * 1000); //1s
res = (*playItf)->GetPosition(playItf, &posInMsec); CheckErr(res);
if (posInMsec == SL_TIME_UNKNOWN) {
fprintf(stderr, "Error: position is SL_TIME_UNKNOWN %ds after start, exiting\n",
counter);
goto destroyRes;
} else {
fprintf(stderr, "position is %dms %ds after start\n", posInMsec, counter);
}
// this test would probably deserve to be improved by relying on drift relative to
// a clock, as the operations between two consecutive sleep() are taking time as well
// and can add up
if (((SLint32)posInMsec > (counter*1000 + TIME_TOLERANCE_MS)) ||
((SLint32)posInMsec < (counter*1000 - TIME_TOLERANCE_MS))) {
fprintf(stderr, "Error: position drifted too much, exiting\n");
goto destroyRes;
}
}
/* Play until the end of file is reached */
{
android::Mutex::Autolock autoLock(eosLock);
while (!eos) {
eosCondition.wait(eosLock);
}
}
fprintf(stdout, "EOS signaled, stopping playback\n");
res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); CheckErr(res);
destroyRes:
/* Destroy the player */
fprintf(stdout, "Destroying the player\n");
(*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", argv[0]);
fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
fprintf(stdout, "Plays a sound and requests position at various times\n\n");
if (argc == 1) {
fprintf(stdout, "Usage: %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]);
exit(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);
TestGetPositionUri(sl, argv[1]);
/* Shutdown OpenSL ES */
(*sl)->Destroy(sl);
return EXIT_SUCCESS;
}