slesTestLoopUri.cpp revision 58432eb9cea995c69b4f905e68b38c1b8216edeb 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <string.h>
20#include <unistd.h>
21#include <sys/time.h>
22
23#include "SLES/OpenSLES.h"
24
25
26#define MAX_NUMBER_INTERFACES 2
27
28#define REPETITIONS 4
29
30//-----------------------------------------------------------------
31//* Exits the application if an error is encountered */
32#define CheckErr(x) ExitOnErrorFunc(x,__LINE__)
33
34void ExitOnErrorFunc( SLresult result , int line)
35{
36    if (SL_RESULT_SUCCESS != result) {
37        fprintf(stderr, "%u error code encountered at line %d, exiting\n", result, line);
38        exit(EXIT_FAILURE);
39    }
40}
41
42//-----------------------------------------------------------------
43/* PrefetchStatusItf callback for an audio player */
44void PrefetchEventCallback( SLPrefetchStatusItf caller,  void *pContext, SLuint32 event)
45{
46    SLpermille level = 0;
47    (*caller)->GetFillLevel(caller, &level);
48    SLuint32 status;
49    //fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event);
50    (*caller)->GetPrefetchStatus(caller, &status);
51    if ((event & (SL_PREFETCHEVENT_STATUSCHANGE|SL_PREFETCHEVENT_FILLLEVELCHANGE))
52            && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) {
53        fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
54        //exit(EXIT_FAILURE);
55    }
56    if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
57        fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
58    }
59    if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
60        fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status);
61    }
62
63}
64
65
66//-----------------------------------------------------------------
67
68/* Play some music from a URI  */
69void TestLoopUri( SLObjectItf sl, const char* path)
70{
71    SLEngineItf                EngineItf;
72
73    SLint32                    numOutputs = 0;
74    SLuint32                   deviceID = 0;
75
76    SLresult                   res;
77
78    SLDataSource               audioSource;
79    SLDataLocator_URI          uri;
80    SLDataFormat_MIME          mime;
81
82    SLDataSink                 audioSink;
83    SLDataLocator_OutputMix    locator_outputmix;
84
85    SLObjectItf                player;
86    SLPlayItf                  playItf;
87    SLSeekItf                  seekItf;
88    SLPrefetchStatusItf        prefetchItf;
89
90    SLObjectItf                OutputMix;
91
92    SLboolean required[MAX_NUMBER_INTERFACES];
93    SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
94
95    /* Get the SL Engine Interface which is implicit */
96    res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);
97    CheckErr(res);
98
99    /* Initialize arrays required[] and iidArray[] */
100    for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
101        required[i] = SL_BOOLEAN_FALSE;
102        iidArray[i] = SL_IID_NULL;
103    }
104
105    required[0] = SL_BOOLEAN_TRUE;
106    iidArray[0] = SL_IID_VOLUME;
107    // Create Output Mix object to be used by player
108    res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
109            iidArray, required); CheckErr(res);
110
111    // Realizing the Output Mix object in synchronous mode.
112    res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE);
113    CheckErr(res);
114
115    /* Setup the data source structure for the URI */
116    uri.locatorType = SL_DATALOCATOR_URI;
117    uri.URI         =  (SLchar*) path;
118    mime.formatType    = SL_DATAFORMAT_MIME;
119    mime.mimeType      = (SLchar*)NULL;
120    mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
121
122    audioSource.pFormat      = (void *)&mime;
123    audioSource.pLocator     = (void *)&uri;
124
125    /* Setup the data sink structure */
126    locator_outputmix.locatorType   = SL_DATALOCATOR_OUTPUTMIX;
127    locator_outputmix.outputMix    = OutputMix;
128    audioSink.pLocator           = (void *)&locator_outputmix;
129    audioSink.pFormat            = NULL;
130
131    /* Create the audio player */
132    required[0] = SL_BOOLEAN_TRUE;
133    iidArray[0] = SL_IID_SEEK;
134    required[1] = SL_BOOLEAN_TRUE;
135    iidArray[1] = SL_IID_PREFETCHSTATUS;
136    res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
137            MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);
138
139    /* Realizing the player in synchronous mode. */
140    res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
141    fprintf(stdout, "URI example: after Realize\n");
142
143    /* Get interfaces */
144    res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf);
145    CheckErr(res);
146
147    res = (*player)->GetInterface(player, SL_IID_SEEK,  (void*)&seekItf);
148    CheckErr(res);
149
150    res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
151    CheckErr(res);
152    res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, &prefetchItf);
153    CheckErr(res);
154    res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
155            SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE);
156    CheckErr(res);
157
158    /* Configure fill level updates every 5 percent */
159    (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50);
160
161    /* Display duration */
162    SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
163    res = (*playItf)->GetDuration(playItf, &durationInMsec);
164    CheckErr(res);
165    if (durationInMsec == SL_TIME_UNKNOWN) {
166        fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
167    } else {
168        fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n",
169                durationInMsec);
170    }
171
172    /* Loop on the whole of the content */
173    res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN);
174    CheckErr(res);
175
176    /* Play the URI */
177    /*     first cause the player to prefetch the data */
178    res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
179    CheckErr(res);
180
181    /*     wait until there's data to play */
182    //SLpermille fillLevel = 0;
183    SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
184    SLuint32 timeOutIndex = 100; // 10s
185    while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0)) {
186        usleep(100 * 1000);
187        (*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
188        timeOutIndex--;
189    }
190
191    if (timeOutIndex == 0) {
192        fprintf(stderr, "\nWe\'re done waiting, failed to prefetch data in time, exiting\n");
193        goto destroyRes;
194    }
195
196    /* Display duration again, */
197    res = (*playItf)->GetDuration(playItf, &durationInMsec);
198    CheckErr(res);
199    if (durationInMsec == SL_TIME_UNKNOWN) {
200        fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
201    } else {
202        fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
203    }
204
205    fprintf(stdout, "starting to play\n");
206    res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
207    CheckErr(res);
208
209    /* Wait as long as the duration of the content, times the repetitions,
210     * before stopping the loop */
211    usleep( (REPETITIONS-1) * durationInMsec * 1100);
212    res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN);
213    CheckErr(res);
214    fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
215    /* wait some more to make sure it doesn't repeat */
216    usleep(durationInMsec * 1000);
217
218    /* Stop playback */
219    fprintf(stdout, "stopping playback\n");
220    res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
221    CheckErr(res);
222
223destroyRes:
224
225    /* Destroy the player */
226    (*player)->Destroy(player);
227
228    /* Destroy Output Mix object */
229    (*OutputMix)->Destroy(OutputMix);
230}
231
232//-----------------------------------------------------------------
233int main(int argc, char* const argv[])
234{
235    SLresult    res;
236    SLObjectItf sl;
237
238    fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf ", argv[0]);
239    fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
240    fprintf(stdout, "Plays a sound and loops it %d times.\n\n", REPETITIONS);
241
242    if (argc == 1) {
243        fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]);
244        fprintf(stdout, "Example: \"%s /sdcard/my.mp3\"  or \"%s file:///sdcard/my.mp3\"\n",
245                argv[0], argv[0]);
246        exit(EXIT_FAILURE);
247    }
248
249    SLEngineOption EngineOption[] = {
250            {(SLuint32) SL_ENGINEOPTION_THREADSAFE,
251            (SLuint32) SL_BOOLEAN_TRUE}};
252
253    res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
254    CheckErr(res);
255    /* Realizing the SL Engine in synchronous mode. */
256    res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
257    CheckErr(res);
258
259    TestLoopUri(sl, argv[1]);
260
261    /* Shutdown OpenSL ES */
262    (*sl)->Destroy(sl);
263
264    return EXIT_SUCCESS;
265}
266