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428 lines
15 KiB
428 lines
15 KiB
4 months ago
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/*
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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 <assert.h>
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#include <pthread.h>
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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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#define MAX_NUMBER_INTERFACES 3
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#define REPETITIONS 4 // 4 repetitions, but will stop the looping before the end
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#define INITIAL_RATE 2000 // 2x normal playback speed
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// These are extensions to OpenSL ES 1.0.1 values
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#define SL_PREFETCHSTATUS_UNKNOWN 0
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#define SL_PREFETCHSTATUS_ERROR ((SLuint32) -1)
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// Mutex and condition shared with main program to protect prefetch_status
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static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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SLuint32 prefetch_status = SL_PREFETCHSTATUS_UNKNOWN;
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/* used to detect errors likely to have occured when the OpenSL ES framework fails to open
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* a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond.
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*/
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#define PREFETCHEVENT_ERROR_CANDIDATE \
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(SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
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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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//-----------------------------------------------------------------
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/* PlayItf callback for an audio player */
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void PlayEventCallback( SLPlayItf caller __unused, void *pContext, SLuint32 event)
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{
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fprintf(stdout, "PlayEventCallback event = ");
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if (event & SL_PLAYEVENT_HEADATEND) {
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fprintf(stdout, "SL_PLAYEVENT_HEADATEND \n");
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/* slow playback down by 2x for next loop, if possible */
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SLpermille minRate, maxRate, stepSize, rate = 1000;
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SLuint32 capa;
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assert(NULL != pContext);
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SLPlaybackRateItf pRateItf = (SLPlaybackRateItf)pContext;
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SLresult res = (*pRateItf)->GetRate(pRateItf, &rate); CheckErr(res);
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res = (*pRateItf)->GetRateRange(pRateItf, 0, &minRate, &maxRate, &stepSize, &capa);
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CheckErr(res);
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fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate);
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rate /= 2;
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if (rate < minRate) {
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rate = minRate;
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}
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fprintf(stdout, "new rate = %d\n", rate);
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res = (*pRateItf)->SetRate(pRateItf, rate); CheckErr(res);
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if (res == SL_RESULT_FEATURE_UNSUPPORTED) {
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fprintf(stderr, "new playback rate %d per mille is unsupported\n", rate);
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} else {
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CheckErr(res);
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}
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}
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if (event & SL_PLAYEVENT_HEADATMARKER) {
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fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER ");
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}
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if (event & SL_PLAYEVENT_HEADATNEWPOS) {
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fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS ");
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}
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if (event & SL_PLAYEVENT_HEADMOVING) {
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fprintf(stdout, "SL_PLAYEVENT_HEADMOVING ");
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}
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if (event & SL_PLAYEVENT_HEADSTALLED) {
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fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED");
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}
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fprintf(stdout, "\n");
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}
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//-----------------------------------------------------------------
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/* PrefetchStatusItf callback for an audio player */
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void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event)
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{
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//fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event);
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SLresult result;
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assert(pContext == NULL);
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SLpermille level = 0;
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result = (*caller)->GetFillLevel(caller, &level);
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CheckErr(result);
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SLuint32 status;
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result = (*caller)->GetPrefetchStatus(caller, &status);
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CheckErr(result);
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if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
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fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
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}
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if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
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fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status);
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}
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SLuint32 new_prefetch_status;
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if ((event & PREFETCHEVENT_ERROR_CANDIDATE) == PREFETCHEVENT_ERROR_CANDIDATE
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&& level == 0 && status == SL_PREFETCHSTATUS_UNDERFLOW) {
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fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
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new_prefetch_status = SL_PREFETCHSTATUS_ERROR;
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} else if (event == SL_PREFETCHEVENT_STATUSCHANGE &&
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status == SL_PREFETCHSTATUS_SUFFICIENTDATA) {
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new_prefetch_status = status;
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} else {
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return;
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}
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int ok;
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ok = pthread_mutex_lock(&mutex);
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assert(ok == 0);
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prefetch_status = new_prefetch_status;
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ok = pthread_cond_signal(&cond);
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assert(ok == 0);
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ok = pthread_mutex_unlock(&mutex);
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assert(ok == 0);
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}
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// Display rate capabilities in a nicely formatted way
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void printCapabilities(SLuint32 capabilities)
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{
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bool needBar = false;
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printf("0x%x (", capabilities);
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#define _(x) \
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if (capabilities & SL_RATEPROP_##x) { \
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if (needBar) \
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printf("|"); \
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printf("SL_RATEPROP_" #x); \
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needBar = true; \
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capabilities &= ~SL_RATEPROP_##x; \
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}
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_(SILENTAUDIO)
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_(STAGGEREDAUDIO)
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_(NOPITCHCORAUDIO)
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_(PITCHCORAUDIO)
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if (capabilities != 0) {
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if (needBar)
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printf("|");
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printf("0x%x", capabilities);
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needBar = true;
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}
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if (!needBar)
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printf("N/A");
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printf(")");
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}
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//-----------------------------------------------------------------
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/* Play some music from a URI */
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void TestSlowDownUri( 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_URI uri;
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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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SLSeekItf seekItf;
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SLPrefetchStatusItf prefetchItf;
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SLPlaybackRateItf rateItf;
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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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/* Get the SL Engine Interface which is implicit */
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res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); 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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required[0] = SL_BOOLEAN_TRUE;
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iidArray[0] = SL_IID_VOLUME;
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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); CheckErr(res);
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/* Setup the data source structure for the URI */
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uri.locatorType = SL_DATALOCATOR_URI;
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uri.URI = (SLchar*) path;
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mime.formatType = SL_DATAFORMAT_MIME;
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mime.mimeType = (SLchar*)NULL;
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mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
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audioSource.pFormat = (void *)&mime;
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audioSource.pLocator = (void *)&uri;
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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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/******************************************************/
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/* Create the audio player */
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required[0] = SL_BOOLEAN_TRUE;
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iidArray[0] = SL_IID_SEEK;
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required[1] = SL_BOOLEAN_TRUE;
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iidArray[1] = SL_IID_PREFETCHSTATUS;
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required[2] = SL_BOOLEAN_TRUE;
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iidArray[2] = SL_IID_PLAYBACKRATE;
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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_SEEK, (void*)&seekItf); CheckErr(res);
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res = (*player)->GetInterface(player, SL_IID_PLAYBACKRATE, (void*)&rateItf); CheckErr(res);
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res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
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CheckErr(res);
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res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL);
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CheckErr(res);
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res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
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SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE); CheckErr(res);
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/* Configure fill level updates every 5 percent */
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(*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50); 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); 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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/* Loop on the whole of the content */
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res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN); CheckErr(res);
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/* Set up marker and position callbacks */
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res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, (void *) rateItf);
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CheckErr(res);
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res = (*playItf)->SetCallbackEventsMask(playItf,
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SL_PLAYEVENT_HEADATEND | SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS);
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res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res);
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res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res);
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/* Get the default rate */
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SLpermille rate = 1234;
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res = (*rateItf)->GetRate(rateItf, &rate); CheckErr(res);
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printf("default rate = %d per mille\n", rate);
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assert(1000 == rate);
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/* Get the default rate properties */
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SLuint32 properties = 0;
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res = (*rateItf)->GetProperties(rateItf, &properties); CheckErr(res);
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printf("default rate properties: ");
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printCapabilities(properties);
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printf("\n");
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assert(SL_RATEPROP_NOPITCHCORAUDIO == properties);
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/* Get all supported playback rate ranges */
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SLuint8 index;
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for (index = 0; ; ++index) {
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SLpermille minRate, maxRate, stepSize;
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SLuint32 capabilities;
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res = (*rateItf)->GetRateRange(rateItf, index, &minRate, &maxRate, &stepSize,
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&capabilities);
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if (res == SL_RESULT_PARAMETER_INVALID) {
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if (index == 0) {
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fprintf(stderr, "implementation supports no rate ranges\n");
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}
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break;
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}
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CheckErr(res);
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if (index == 255) {
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fprintf(stderr, "implementation supports way too many rate ranges, I'm giving up\n");
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break;
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}
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printf("range[%u]: min=%d, max=%d, capabilities=", index, minRate, maxRate);
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printCapabilities(capabilities);
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printf("\n");
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}
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/* Change the playback rate before playback */
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res = (*rateItf)->SetRate(rateItf, INITIAL_RATE);
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if (res == SL_RESULT_FEATURE_UNSUPPORTED || res == SL_RESULT_PARAMETER_INVALID) {
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fprintf(stderr, "initial playback rate %d per mille is unsupported\n", INITIAL_RATE);
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} else {
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CheckErr(res);
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}
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/******************************************************/
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/* Play the URI */
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/* first cause the player to prefetch the data */
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res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res);
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// wait for prefetch status callback to indicate either sufficient data or error
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pthread_mutex_lock(&mutex);
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while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) {
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pthread_cond_wait(&cond, &mutex);
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}
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pthread_mutex_unlock(&mutex);
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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;
|
||
|
|
}
|