/*
* 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 <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <SLES/OpenSLES.h>
#define MAX_NUMBER_INTERFACES 3
//-----------------------------------------------------------------
/* Exits the application if an error is encountered */
void ExitOnError( SLresult result )
{
if (SL_RESULT_SUCCESS != result) {
fprintf(stdout, "%u error code encountered, exiting\n", result);
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 ");
}
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");
}
//-----------------------------------------------------------------
/* Play two audio URIs, pan them left and right */
void TestPlayUri( SLObjectItf sl, const char* path, const char* path2)
{
SLresult result;
SLEngineItf EngineItf;
/* Objects this application uses: two players and an ouput mix */
SLObjectItf player, player2, outputMix;
/* Source of audio data to play, we'll reuse the same source for two different players */
SLDataSource audioSource;
SLDataLocator_URI uri;
SLDataFormat_MIME mime;
/* Data sinks for the two audio players */
SLDataSink audioSink;
SLDataLocator_OutputMix locator_outputmix;
/* Play, Volume and PrefetchStatus interfaces for the audio players */
SLPlayItf playItf, playItf2;
SLVolumeItf volItf, volItf2;
SLPrefetchStatusItf prefetchItf, prefetchItf2;
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;
}
/* Set arrays required[] and iidArray[] for SLVolumeItf and SLPrefetchStatusItf interfaces */
/* (SLPlayItf is implicit) */
required[0] = SL_BOOLEAN_TRUE;
iidArray[0] = SL_IID_VOLUME;
required[1] = SL_BOOLEAN_TRUE;
iidArray[1] = SL_IID_PREFETCHSTATUS;
/* ------------------------------------------------------ */
/* Configuration of the output mix */
/* Create Output Mix object to be used each player */
result = (*EngineItf)->CreateOutputMix(EngineItf, &outputMix, 0, iidArray, required);
ExitOnError(result);
/* Realize the Output Mix object in synchronous mode */
result = (*outputMix)->Realize(outputMix, SL_BOOLEAN_FALSE);
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;
/* ------------------------------------------------------ */
/* Configuration of the players */
/* Setup the data source structure for the first URI */
uri.locatorType = SL_DATALOCATOR_URI;
uri.URI = (SLchar*) path;
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;
audioSource.pLocator = (void *)&uri;
/* Create the first audio player */
result = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink, 2,
iidArray, required);
ExitOnError(result);
/* Create the second audio player with a different path for its data source */
uri.URI = (SLchar*) path2;
audioSource.pLocator = (void *)&uri;
result = (*EngineItf)->CreateAudioPlayer(EngineItf, &player2, &audioSource, &audioSink, 2,
iidArray, required);
ExitOnError(result);
/* Realize the players in synchronous mode. */
result = (*player)->Realize(player, SL_BOOLEAN_FALSE); ExitOnError(result);
result = (*player)->Realize(player2, SL_BOOLEAN_FALSE); ExitOnError(result);
//fprintf(stdout, "URI example: after Realize\n");
/* Get the SLPlayItf, SLVolumeItf and SLPrefetchStatusItf interfaces for each player */
result = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf);
ExitOnError(result);
result = (*player)->GetInterface(player2, SL_IID_PLAY, (void*)&playItf2);
ExitOnError(result);
result = (*player)->GetInterface(player, SL_IID_VOLUME, (void*)&volItf);
ExitOnError(result);
result = (*player2)->GetInterface(player2, SL_IID_VOLUME, (void*)&volItf2);
ExitOnError(result);
result = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
ExitOnError(result);
result = (*player2)->GetInterface(player2, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf2);
ExitOnError(result);
/* Setup to receive playback events */
result = (*playItf)->RegisterCallback(playItf, PlayEventCallback, &playItf);
ExitOnError(result);
result = (*playItf)->SetCallbackEventsMask(playItf,
SL_PLAYEVENT_HEADATEND| SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS
| SL_PLAYEVENT_HEADMOVING | SL_PLAYEVENT_HEADSTALLED);
ExitOnError(result);
/* Set the player volume */
result = (*volItf)->SetVolumeLevel( volItf, -300);
ExitOnError(result);
/* Pan the first player to the left */
result = (*volItf)->EnableStereoPosition( volItf, SL_BOOLEAN_TRUE); ExitOnError(result);
result = (*volItf)->SetStereoPosition( volItf, -1000); ExitOnError(result);
/* Pan the second player to the right */
result = (*volItf2)->EnableStereoPosition( volItf2, SL_BOOLEAN_TRUE); ExitOnError(result);
result = (*volItf2)->SetStereoPosition( volItf2, 1000); ExitOnError(result);
/* ------------------------------------------------------ */
/* Playback */
/* Start the data prefetching by setting the players to the paused state */
result = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
ExitOnError(result);
result = (*playItf2)->SetPlayState( playItf2, SL_PLAYSTATE_PAUSED );
ExitOnError(result);
/* wait until there's data to play */
SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
while (prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) {
usleep(100 * 1000);
(*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
}
prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
while (prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) {
usleep(100 * 1000);
(*prefetchItf2)->GetPrefetchStatus(prefetchItf2, &prefetchStatus);
}
result = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
ExitOnError(result);
/* Wait 2s before starting the second player */
usleep(2000 * 1000);
fprintf(stdout, "URI example: starting to play %s\n", path2);
result = (*playItf2)->SetPlayState( playItf2, SL_PLAYSTATE_PLAYING );
ExitOnError(result);
/* Display duration */
SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
result = (*playItf)->GetDuration(playItf, &durationInMsec);
ExitOnError(result);
if (durationInMsec == SL_TIME_UNKNOWN) {
fprintf(stdout, "Content duration of first URI is unknown\n");
} else {
fprintf(stdout, "Content duration of first URI is %u ms\n", durationInMsec);
}
/* Wait as long as the duration of the first URI + 2s before stopping */
if (durationInMsec == SL_TIME_UNKNOWN) {
durationInMsec = 5000; /* arbitrary time when duration is unknown */
}
usleep((durationInMsec + 2000) * 1000);
/* Make sure player is stopped */
fprintf(stdout, "URI example: stopping playback\n");
result = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
ExitOnError(result);
result = (*playItf2)->SetPlayState(playItf2, SL_PLAYSTATE_STOPPED);
ExitOnError(result);
/* Destroy the players */
(*player)->Destroy(player);
(*player2)->Destroy(player2);
/* Destroy Output Mix object */
(*outputMix)->Destroy(outputMix);
}
//-----------------------------------------------------------------
int main(int argc, char* const argv[])
{
SLresult result;
SLObjectItf sl;
fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLVolumeItf (incl. stereo position) ",
argv[0]);
fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
fprintf(stdout, "Plays two sounds (or twice the same) and pans them left and right.");
fprintf(stdout, "Stops after the end of the first + 2s\n");
if (argc == 1) {
fprintf(stdout, "Usage: \n\t%s url1 url2 \n\t%s url\n", argv[0], argv[0]);
fprintf(stdout, "Example: \"%s /sdcard/my.mp3 http://blabla/my.wav\" ", argv[0]);
fprintf(stdout, "or \"%s file:///sdcard/my.mp3\"\n", argv[0]);
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);
if (argc == 2) {
TestPlayUri(sl, argv[1], argv[1]);
} else if (argc == 3) {
TestPlayUri(sl, argv[1], argv[2]);
}
/* Shutdown OpenSL ES */
(*sl)->Destroy(sl);
return EXIT_SUCCESS;
}