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409 lines
15 KiB
409 lines
15 KiB
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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//#include <string.h>
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#include <unistd.h>
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//#include <sys/time.h>
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#include <SLES/OpenSLES.h>
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#include <SLES/OpenSLES_Android.h>
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//#define TEST_DISPLAY_FIRST_BUFFER_ITEM
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//#define TEST_CLEAR
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//#define TEST_PTS
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#define MAX_NUMBER_INTERFACES 2
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#define PREFETCHEVENT_ERROR_CANDIDATE \
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(SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
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#define NB_BUFFERS 16
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#define MPEG2_TS_BLOCK_SIZE 188
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#define BUFFER_SIZE (20*MPEG2_TS_BLOCK_SIZE)
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#define DISCONTINUITY_MAGIC 1977
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/* Where we store the data to play */
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char dataCache[BUFFER_SIZE * NB_BUFFERS];
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/* From where we read the data to play */
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FILE *file;
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/* Has the app reached the end of the file */
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bool reachedEof = false;
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/* Special discontinuity buffer context */
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int myDiscBufferContext = DISCONTINUITY_MAGIC;
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/* structure to store my discontinuity with PTS command */
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typedef struct {
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SLuint32 discKey; // identifies the item
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SLuint32 discSize;
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SLAuint64 discPts;
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} DiscPts;
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//-----------------------------------------------------------------
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/* Exits the application if an error is encountered */
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#define CheckErr(x) ExitOnErrorFunc(x,__LINE__)
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void ExitOnErrorFunc( SLresult result , int line)
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{
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if (SL_RESULT_SUCCESS != result) {
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fprintf(stderr, "%u error code encountered at line %d, exiting\n", result, line);
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exit(EXIT_FAILURE);
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}
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}
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bool prefetchError = false;
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//-----------------------------------------------------------------
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/* AndroidBufferQueueItf callback for an audio player */
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SLresult AndroidBufferQueueCallback(
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SLAndroidBufferQueueItf caller,
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void *pCallbackContext __unused, /* input */
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void *pBufferContext, /* input */
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void *pBufferData __unused, /* input */
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SLuint32 dataSize __unused, /* input */
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SLuint32 dataUsed __unused, /* input */
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const SLAndroidBufferItem *pItems __unused, /* input */
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SLuint32 itemsLength __unused /* input */)
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{
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// assert(BUFFER_SIZE <= dataSize);
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//--------------------------------------------------------------------------------
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// this section is for testing only, this is NOT an example of how to use the API
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// to play a .ts file, but rather shows more ways to exercise the API
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//--------------------------------------------------------------------------------
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SLAndroidBufferQueueState state;
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(*caller)->GetState(caller, &state);
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//fprintf(stdout, "ABQ state count=%lu, index=%lu\n", state.count, state.index);
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// just to test, clear the queue to see what happens
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if (state.index == 500) {
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#ifdef TEST_CLEAR
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(*caller)->Clear(caller);
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// we've cleared the queue, and have introduced a discontinuity, so signal it
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SLAndroidBufferItem msgDiscontinuity;
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msgDiscontinuity.itemKey = SL_ANDROID_ITEMKEY_DISCONTINUITY;
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msgDiscontinuity.itemSize = 0;
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// message has no parameters, so the total size of the message is the size of the key
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// plus the size if itemSize, both SLuint32
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(*caller)->Enqueue(caller, (void*)&myDiscBufferContext /*pBufferContext*/,
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NULL /*pData*/, 0 /*dataLength*/,
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&msgDiscontinuity /*pMsg*/,
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sizeof(SLuint32)*2 /*msgLength*/);
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// we've cleared the queue, it's now empty: let's rebuffer a bit so playback doesn't starve
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size_t nbRead = fread((void*)dataCache, 1, BUFFER_SIZE*(NB_BUFFERS/2), file);
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if (nbRead == BUFFER_SIZE*(NB_BUFFERS/2)) {
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for (int i=0 ; i < NB_BUFFERS/2 ; i++) {
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SLresult res = (*caller)->Enqueue(caller, NULL /*pBufferContext*/,
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dataCache + i*BUFFER_SIZE,
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BUFFER_SIZE, NULL, 0);
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CheckErr(res);
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}
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}
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#endif
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#ifdef TEST_PTS
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DiscPts msgDiscontinuity = { SL_ANDROID_ITEMKEY_DISCONTINUITY,
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sizeof(SLAuint64), 15*90*1000 /*15s in 90kHz clock */ };
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// enqueue discontinuity message with our PTS
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(*caller)->Enqueue(caller, (void*)&myDiscBufferContext /*pBufferContext*/,
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NULL /*pData*/, 0 /*dataLength*/,
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(SLAndroidBufferItem*)&msgDiscontinuity,
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sizeof(DiscPts) );
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fprintf(stdout, "rendering will resume at 15s mark");
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#endif
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return SL_RESULT_SUCCESS;
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}
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//--------------------------------------------------------------------------------
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// end of test only section
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//--------------------------------------------------------------------------------
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else {
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#ifdef TEST_DISPLAY_FIRST_BUFFER_ITEM
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// display item data (only parsing first item)
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if (itemsLength !=0) {
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fprintf(stdout, "item key=0x%lx size=%lu data=0x%lx\n",
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pItems->itemKey, pItems->itemSize, *((SLuint32*)&pItems->itemData));
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}
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#endif
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// pBufferData can be null if the last consumed buffer contained only a command
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// just like we do for signalling DISCONTINUITY (above) or EOS (below)
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if ((pBufferContext != NULL) && (*((int*)pBufferContext) == DISCONTINUITY_MAGIC)) {
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fprintf(stdout, "Successfully detected my discontinuity buffer having been consumed\n");
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}
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if (pBufferData != NULL) {
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size_t nbRead = fread((void*)pBufferData, 1, BUFFER_SIZE, file);
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if (nbRead > 0) {
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(*caller)->Enqueue(caller, NULL /*pBufferContext*/,
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pBufferData /*pData*/,
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nbRead /*dataLength*/,
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NULL /*pMsg*/,
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0 /*msgLength*/);
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} else if (!reachedEof) {
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// signal EOS
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SLAndroidBufferItem msgEos;
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msgEos.itemKey = SL_ANDROID_ITEMKEY_EOS;
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msgEos.itemSize = 0;
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// EOS message has no parameters, so the total size of the message is the size of
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// the key plus the size if itemSize, both SLuint32
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(*caller)->Enqueue(caller, NULL /*pBufferContext*/,
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NULL /*pData*/, 0 /*dataLength*/,
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&msgEos /*pMsg*/,
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sizeof(SLuint32)*2 /*msgLength*/);
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reachedEof = true;
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}
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}
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return SL_RESULT_SUCCESS;
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}
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}
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//-----------------------------------------------------------------
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/* Play some music from a URI */
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void TestPlayStream( SLObjectItf sl, const char* path)
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{
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SLEngineItf EngineItf;
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SLresult res;
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SLDataSource audioSource;
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SLDataLocator_AndroidBufferQueue streamLocator;
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SLDataFormat_MIME mime;
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SLDataSink audioSink;
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SLDataLocator_OutputMix locator_outputmix;
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SLObjectItf player;
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SLPlayItf playItf;
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SLVolumeItf volItf;
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SLAndroidBufferQueueItf abqItf;
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SLObjectItf OutputMix;
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SLboolean required[MAX_NUMBER_INTERFACES];
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SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
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int playTimeInSec = 60;
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file = fopen(path, "rb");
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/* Get the SL Engine Interface which is implicit */
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res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);
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CheckErr(res);
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/* Initialize arrays required[] and iidArray[] */
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for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
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required[i] = SL_BOOLEAN_FALSE;
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iidArray[i] = SL_IID_NULL;
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}
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// Set arrays required[] and iidArray[] for VOLUME and PREFETCHSTATUS interface
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required[0] = SL_BOOLEAN_TRUE;
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iidArray[0] = SL_IID_VOLUME;
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required[1] = SL_BOOLEAN_TRUE;
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iidArray[1] = SL_IID_ANDROIDBUFFERQUEUESOURCE;
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// Create Output Mix object to be used by player
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res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
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iidArray, required); CheckErr(res);
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// Realizing the Output Mix object in synchronous mode.
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res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE);
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CheckErr(res);
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/* Setup the data source structure for the URI */
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streamLocator.locatorType = SL_DATALOCATOR_ANDROIDBUFFERQUEUE;
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streamLocator.numBuffers = NB_BUFFERS;
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mime.formatType = SL_DATAFORMAT_MIME;
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mime.mimeType = (SLchar *) "video/mp2ts";//(SLchar*)NULL;
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mime.containerType = SL_CONTAINERTYPE_MPEG_TS;
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audioSource.pFormat = (void *)&mime;
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audioSource.pLocator = (void *)&streamLocator;
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/* Setup the data sink structure */
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locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
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locator_outputmix.outputMix = OutputMix;
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audioSink.pLocator = (void *)&locator_outputmix;
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audioSink.pFormat = NULL;
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/* Create the audio player */
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res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
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MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);
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/* Realizing the player in synchronous mode. */
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res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
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fprintf(stdout, "URI example: after Realize\n");
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/* Get interfaces */
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res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); CheckErr(res);
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res = (*player)->GetInterface(player, SL_IID_VOLUME, (void*)&volItf); CheckErr(res);
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res = (*player)->GetInterface(player, SL_IID_ANDROIDBUFFERQUEUESOURCE, (void*)&abqItf);
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CheckErr(res);
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res = (*abqItf)->RegisterCallback(abqItf, AndroidBufferQueueCallback,
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// context is not used in the example, but can be used to track who registered
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// the buffer queue callback
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NULL /*pContext*/); CheckErr(res);
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res = (*abqItf)->SetCallbackEventsMask(abqItf, SL_ANDROIDBUFFERQUEUEEVENT_PROCESSED);
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CheckErr(res);
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/* Display duration */
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SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
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res = (*playItf)->GetDuration(playItf, &durationInMsec);
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CheckErr(res);
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if (durationInMsec == SL_TIME_UNKNOWN) {
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fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
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} else {
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fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n",
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durationInMsec);
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}
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/* Set the player volume */
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res = (*volItf)->SetVolumeLevel( volItf, 0);//-300);
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CheckErr(res);
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/* Play the URI */
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/* first cause the player to prefetch the data */
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fprintf(stdout, "Before set to PAUSED\n");
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res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
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fprintf(stdout, "After set to PAUSED\n");
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CheckErr(res);
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/* Fill our cache */
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if (fread(dataCache, 1, BUFFER_SIZE * NB_BUFFERS, file) <= 0) {
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fprintf(stderr, "Error filling cache, exiting\n");
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goto destroyRes;
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}
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/* Enqueue the content of our cache before starting to play,
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* we don't want to starve the player */
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for (int i=0 ; i < NB_BUFFERS ; i++) {
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res = (*abqItf)->Enqueue(abqItf, NULL /*pBufferContext*/,
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dataCache + i*BUFFER_SIZE, BUFFER_SIZE, NULL, 0);
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CheckErr(res);
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}
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#if 0 // used to test ABQ starving where only one buffer is enqueued before playback
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/* Fill our cache */
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if (fread(dataCache, 1, BUFFER_SIZE * 1, file) <= 0) {
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fprintf(stderr, "Error filling cache, exiting\n");
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goto destroyRes;
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}
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/* Enqueue the content of our cache before starting to play,
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* we don't want to starve the player */
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for (int i=0 ; i < 1 ; i++) {
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res = (*abqItf)->Enqueue(abqItf, dataCache + i*BUFFER_SIZE, BUFFER_SIZE, NULL, 0);
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CheckErr(res);
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}
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#endif
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/* wait until there's data to play */
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//SLpermille fillLevel = 0;
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/*
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SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
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SLuint32 timeOutIndex = 2;
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while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0) &&
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!prefetchError) {
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usleep(1 * 1000 * 1000); // 1s
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//(*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
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timeOutIndex--;
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}
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if (timeOutIndex == 0 || prefetchError) {
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fprintf(stderr, "We\'re done waiting, failed to prefetch data in time, exiting\n");
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goto destroyRes;
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}
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*/
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/* Display duration again, */
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/* res = (*playItf)->GetDuration(playItf, &durationInMsec);
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CheckErr(res);
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if (durationInMsec == SL_TIME_UNKNOWN) {
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fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
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} else {
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fprintf(stdout, "Content duration is %lu ms (after prefetch completed)\n", durationInMsec);
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}
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*/
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fprintf(stdout, "URI example: starting to play\n");
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res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
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CheckErr(res);
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/* Wait as long as the duration of the content before stopping */
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fprintf(stdout, "Letting playback go on for %d sec\n", playTimeInSec);
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usleep(playTimeInSec /*s*/ * 1000 * 1000);
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/* Make sure player is stopped */
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fprintf(stdout, "URI example: stopping playback\n");
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res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
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CheckErr(res);
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fprintf(stdout, "sleeping to verify playback stopped\n");
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usleep(2 /*s*/ * 1000 * 1000);
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destroyRes:
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/* Destroy the player */
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(*player)->Destroy(player);
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/* Destroy Output Mix object */
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(*OutputMix)->Destroy(OutputMix);
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fclose(file);
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}
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//-----------------------------------------------------------------
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int main(int argc, char* const argv[])
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{
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SLresult res;
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SLObjectItf sl;
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fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLVolumeItf, SLAndroidBufferQueue \n",
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argv[0]);
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fprintf(stdout, "and AudioPlayer with SL_DATALOCATOR_ANDROIDBUFFERQUEUE source / OutputMix "
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"sink\n");
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fprintf(stdout, "Plays a sound and stops after its reported duration\n\n");
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if (argc != 2) {
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fprintf(stdout, "Usage: %s path.ts\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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SLEngineOption EngineOption[] = {
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{(SLuint32) SL_ENGINEOPTION_THREADSAFE,
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(SLuint32) SL_BOOLEAN_TRUE}};
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res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
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CheckErr(res);
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/* Realizing the SL Engine in synchronous mode. */
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res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
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CheckErr(res);
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TestPlayStream(sl, argv[1]);
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/* Shutdown OpenSL ES */
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(*sl)->Destroy(sl);
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return EXIT_SUCCESS;
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}
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