/*
* 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 <string.h>
#include <unistd.h>
//#include <sys/time.h>
#include <SLES/OpenSLES.h>
#include <SLES/OpenSLES_Android.h>
//#define TEST_DISPLAY_FIRST_BUFFER_ITEM
//#define TEST_CLEAR
//#define TEST_PTS
#define MAX_NUMBER_INTERFACES 2
#define PREFETCHEVENT_ERROR_CANDIDATE \
(SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
#define NB_BUFFERS 16
#define MPEG2_TS_BLOCK_SIZE 188
#define BUFFER_SIZE (20*MPEG2_TS_BLOCK_SIZE)
#define DISCONTINUITY_MAGIC 1977
/* Where we store the data to play */
char dataCache[BUFFER_SIZE * NB_BUFFERS];
/* From where we read the data to play */
FILE *file;
/* Has the app reached the end of the file */
bool reachedEof = false;
/* Special discontinuity buffer context */
int myDiscBufferContext = DISCONTINUITY_MAGIC;
/* structure to store my discontinuity with PTS command */
typedef struct {
SLuint32 discKey; // identifies the item
SLuint32 discSize;
SLAuint64 discPts;
} DiscPts;
//-----------------------------------------------------------------
/* 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;
//-----------------------------------------------------------------
/* AndroidBufferQueueItf callback for an audio player */
SLresult AndroidBufferQueueCallback(
SLAndroidBufferQueueItf caller,
void *pCallbackContext __unused, /* input */
void *pBufferContext, /* input */
void *pBufferData __unused, /* input */
SLuint32 dataSize __unused, /* input */
SLuint32 dataUsed __unused, /* input */
const SLAndroidBufferItem *pItems __unused, /* input */
SLuint32 itemsLength __unused /* input */)
{
// assert(BUFFER_SIZE <= dataSize);
//--------------------------------------------------------------------------------
// this section is for testing only, this is NOT an example of how to use the API
// to play a .ts file, but rather shows more ways to exercise the API
//--------------------------------------------------------------------------------
SLAndroidBufferQueueState state;
(*caller)->GetState(caller, &state);
//fprintf(stdout, "ABQ state count=%lu, index=%lu\n", state.count, state.index);
// just to test, clear the queue to see what happens
if (state.index == 500) {
#ifdef TEST_CLEAR
(*caller)->Clear(caller);
// we've cleared the queue, and have introduced a discontinuity, so signal it
SLAndroidBufferItem msgDiscontinuity;
msgDiscontinuity.itemKey = SL_ANDROID_ITEMKEY_DISCONTINUITY;
msgDiscontinuity.itemSize = 0;
// message has no parameters, so the total size of the message is the size of the key
// plus the size if itemSize, both SLuint32
(*caller)->Enqueue(caller, (void*)&myDiscBufferContext /*pBufferContext*/,
NULL /*pData*/, 0 /*dataLength*/,
&msgDiscontinuity /*pMsg*/,
sizeof(SLuint32)*2 /*msgLength*/);
// we've cleared the queue, it's now empty: let's rebuffer a bit so playback doesn't starve
size_t nbRead = fread((void*)dataCache, 1, BUFFER_SIZE*(NB_BUFFERS/2), file);
if (nbRead == BUFFER_SIZE*(NB_BUFFERS/2)) {
for (int i=0 ; i < NB_BUFFERS/2 ; i++) {
SLresult res = (*caller)->Enqueue(caller, NULL /*pBufferContext*/,
dataCache + i*BUFFER_SIZE,
BUFFER_SIZE, NULL, 0);
CheckErr(res);
}
}
#endif
#ifdef TEST_PTS
DiscPts msgDiscontinuity = { SL_ANDROID_ITEMKEY_DISCONTINUITY,
sizeof(SLAuint64), 15*90*1000 /*15s in 90kHz clock */ };
// enqueue discontinuity message with our PTS
(*caller)->Enqueue(caller, (void*)&myDiscBufferContext /*pBufferContext*/,
NULL /*pData*/, 0 /*dataLength*/,
(SLAndroidBufferItem*)&msgDiscontinuity,
sizeof(DiscPts) );
fprintf(stdout, "rendering will resume at 15s mark");
#endif
return SL_RESULT_SUCCESS;
}
//--------------------------------------------------------------------------------
// end of test only section
//--------------------------------------------------------------------------------
else {
#ifdef TEST_DISPLAY_FIRST_BUFFER_ITEM
// display item data (only parsing first item)
if (itemsLength !=0) {
fprintf(stdout, "item key=0x%lx size=%lu data=0x%lx\n",
pItems->itemKey, pItems->itemSize, *((SLuint32*)&pItems->itemData));
}
#endif
// pBufferData can be null if the last consumed buffer contained only a command
// just like we do for signalling DISCONTINUITY (above) or EOS (below)
if ((pBufferContext != NULL) && (*((int*)pBufferContext) == DISCONTINUITY_MAGIC)) {
fprintf(stdout, "Successfully detected my discontinuity buffer having been consumed\n");
}
if (pBufferData != NULL) {
size_t nbRead = fread((void*)pBufferData, 1, BUFFER_SIZE, file);
if (nbRead > 0) {
(*caller)->Enqueue(caller, NULL /*pBufferContext*/,
pBufferData /*pData*/,
nbRead /*dataLength*/,
NULL /*pMsg*/,
0 /*msgLength*/);
} else if (!reachedEof) {
// signal EOS
SLAndroidBufferItem msgEos;
msgEos.itemKey = SL_ANDROID_ITEMKEY_EOS;
msgEos.itemSize = 0;
// EOS message has no parameters, so the total size of the message is the size of
// the key plus the size if itemSize, both SLuint32
(*caller)->Enqueue(caller, NULL /*pBufferContext*/,
NULL /*pData*/, 0 /*dataLength*/,
&msgEos /*pMsg*/,
sizeof(SLuint32)*2 /*msgLength*/);
reachedEof = true;
}
}
return SL_RESULT_SUCCESS;
}
}
//-----------------------------------------------------------------
/* Play some music from a URI */
void TestPlayStream( SLObjectItf sl, const char* path)
{
SLEngineItf EngineItf;
SLint32 numOutputs = 0;
SLuint32 deviceID = 0;
SLresult res;
SLDataSource audioSource;
SLDataLocator_AndroidBufferQueue streamLocator;
SLDataFormat_MIME mime;
SLDataSink audioSink;
SLDataLocator_OutputMix locator_outputmix;
SLObjectItf player;
SLPlayItf playItf;
SLVolumeItf volItf;
SLAndroidBufferQueueItf abqItf;
SLObjectItf OutputMix;
SLboolean required[MAX_NUMBER_INTERFACES];
SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
int playTimeInSec = 60;
file = fopen(path, "rb");
/* 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;
}
// 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_ANDROIDBUFFERQUEUESOURCE;
// 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 */
streamLocator.locatorType = SL_DATALOCATOR_ANDROIDBUFFERQUEUE;
streamLocator.numBuffers = NB_BUFFERS;
mime.formatType = SL_DATAFORMAT_MIME;
mime.mimeType = (SLchar *) "video/mp2ts";//(SLchar*)NULL;
mime.containerType = SL_CONTAINERTYPE_MPEG_TS;
audioSource.pFormat = (void *)&mime;
audioSource.pLocator = (void *)&streamLocator;
/* 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,
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_VOLUME, (void*)&volItf); CheckErr(res);
res = (*player)->GetInterface(player, SL_IID_ANDROIDBUFFERQUEUESOURCE, (void*)&abqItf);
CheckErr(res);
res = (*abqItf)->RegisterCallback(abqItf, AndroidBufferQueueCallback,
// context is not used in the example, but can be used to track who registered
// the buffer queue callback
NULL /*pContext*/); CheckErr(res);
res = (*abqItf)->SetCallbackEventsMask(abqItf, SL_ANDROIDBUFFERQUEUEEVENT_PROCESSED);
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);
}
/* Set the player volume */
res = (*volItf)->SetVolumeLevel( volItf, 0);//-300);
CheckErr(res);
/* Play the URI */
/* first cause the player to prefetch the data */
fprintf(stdout, "Before set to PAUSED\n");
res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
fprintf(stdout, "After set to PAUSED\n");
CheckErr(res);
/* Fill our cache */
if (fread(dataCache, 1, BUFFER_SIZE * NB_BUFFERS, file) <= 0) {
fprintf(stderr, "Error filling cache, exiting\n");
goto destroyRes;
}
/* Enqueue the content of our cache before starting to play,
* we don't want to starve the player */
for (int i=0 ; i < NB_BUFFERS ; i++) {
res = (*abqItf)->Enqueue(abqItf, NULL /*pBufferContext*/,
dataCache + i*BUFFER_SIZE, BUFFER_SIZE, NULL, 0);
CheckErr(res);
}
#if 0 // used to test ABQ starving where only one buffer is enqueued before playback
/* Fill our cache */
if (fread(dataCache, 1, BUFFER_SIZE * 1, file) <= 0) {
fprintf(stderr, "Error filling cache, exiting\n");
goto destroyRes;
}
/* Enqueue the content of our cache before starting to play,
* we don't want to starve the player */
for (int i=0 ; i < 1 ; i++) {
res = (*abqItf)->Enqueue(abqItf, dataCache + i*BUFFER_SIZE, BUFFER_SIZE, NULL, 0);
CheckErr(res);
}
#endif
/* wait until there's data to play */
//SLpermille fillLevel = 0;
/*
SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
SLuint32 timeOutIndex = 2;
while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0) &&
!prefetchError) {
usleep(1 * 1000 * 1000); // 1s
//(*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 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 %lu ms (after prefetch completed)\n", durationInMsec);
}
*/
fprintf(stdout, "URI example: starting to play\n");
res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
CheckErr(res);
/* Wait as long as the duration of the content before stopping */
fprintf(stdout, "Letting playback go on for %d sec\n", playTimeInSec);
usleep(playTimeInSec /*s*/ * 1000 * 1000);
/* Make sure player is stopped */
fprintf(stdout, "URI example: stopping playback\n");
res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
CheckErr(res);
fprintf(stdout, "sleeping to verify playback stopped\n");
usleep(2 /*s*/ * 1000 * 1000);
destroyRes:
/* Destroy the player */
(*player)->Destroy(player);
/* Destroy Output Mix object */
(*OutputMix)->Destroy(OutputMix);
fclose(file);
}
//-----------------------------------------------------------------
int main(int argc, char* const argv[])
{
SLresult res;
SLObjectItf sl;
fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLVolumeItf, SLAndroidBufferQueue \n",
argv[0]);
fprintf(stdout, "and AudioPlayer with SL_DATALOCATOR_ANDROIDBUFFERQUEUE source / OutputMix "
"sink\n");
fprintf(stdout, "Plays a sound and stops after its reported duration\n\n");
if (argc != 2) {
fprintf(stdout, "Usage: %s path.ts\n", 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);
TestPlayStream(sl, argv[1]);
/* Shutdown OpenSL ES */
(*sl)->Destroy(sl);
return EXIT_SUCCESS;
}