slesTestLoopUri.cpp revision 14463a8e53e2a5185a395e2045fd33ad4a63050d 
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 <assert.h>
18#include <pthread.h>
19#include <stdlib.h>
20#include <stdio.h>
21#include <string.h>
22#include <unistd.h>
23#include <sys/time.h>
24
25#include <SLES/OpenSLES.h>
26
27
28#define MAX_NUMBER_INTERFACES 2
29
30#define REPETITIONS 4
31
32// These are extensions to OpenSL ES 1.0.1 values
33
34#define SL_PREFETCHSTATUS_UNKNOWN 0
35#define SL_PREFETCHSTATUS_ERROR   ((SLuint32) -1)
36
37// Mutex and condition shared with main program to protect prefetch_status
38
39static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
40static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
41SLuint32 prefetch_status = SL_PREFETCHSTATUS_UNKNOWN;
42
43/* used to detect errors likely to have occured when the OpenSL ES framework fails to open
44 * a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond.
45 */
46#define PREFETCHEVENT_ERROR_CANDIDATE \
47        (SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
48
49//-----------------------------------------------------------------
50//* Exits the application if an error is encountered */
51#define CheckErr(x) ExitOnErrorFunc(x,__LINE__)
52
53void ExitOnErrorFunc( SLresult result , int line)
54{
55    if (SL_RESULT_SUCCESS != result) {
56        fprintf(stderr, "%u error code encountered at line %d, exiting\n", result, line);
57        exit(EXIT_FAILURE);
58    }
59}
60
61//-----------------------------------------------------------------
62/* PrefetchStatusItf callback for an audio player */
63void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event)
64{
65    SLresult result;
66    // pContext is unused here, so we pass NULL
67    assert(pContext == NULL);
68    SLpermille level = 0;
69    result = (*caller)->GetFillLevel(caller, &level);
70    CheckErr(result);
71    SLuint32 status;
72    result = (*caller)->GetPrefetchStatus(caller, &status);
73    CheckErr(result);
74    if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
75        fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
76    }
77    if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
78        fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status);
79    }
80    SLuint32 new_prefetch_status;
81    if ((event & PREFETCHEVENT_ERROR_CANDIDATE) == PREFETCHEVENT_ERROR_CANDIDATE
82            && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) {
83        fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
84        new_prefetch_status = SL_PREFETCHSTATUS_ERROR;
85    } else if (event == SL_PREFETCHEVENT_STATUSCHANGE &&
86            status == SL_PREFETCHSTATUS_SUFFICIENTDATA) {
87        new_prefetch_status = status;
88    } else {
89        return;
90    }
91    int ok;
92    ok = pthread_mutex_lock(&mutex);
93    assert(ok == 0);
94    prefetch_status = new_prefetch_status;
95    ok = pthread_cond_signal(&cond);
96    assert(ok == 0);
97    ok = pthread_mutex_unlock(&mutex);
98    assert(ok == 0);
99}
100
101
102//-----------------------------------------------------------------
103/* PlayItf callback for playback events */
104void PlayEventCallback(
105        SLPlayItf caller __unused,
106        void *pContext,
107        SLuint32 event)
108{
109    // pContext is unused here, so we pass NULL
110    assert(NULL == pContext);
111    if (SL_PLAYEVENT_HEADATEND == event) {
112        printf("SL_PLAYEVENT_HEADATEND reached\n");
113    } else {
114        fprintf(stderr, "Unexpected play event 0x%x", event);
115    }
116}
117
118
119//-----------------------------------------------------------------
120
121/* Play some music from a URI  */
122void TestLoopUri( SLObjectItf sl, const char* path)
123{
124    SLEngineItf                EngineItf;
125
126    SLint32                    numOutputs = 0;
127    SLuint32                   deviceID = 0;
128
129    SLresult                   res;
130
131    SLDataSource               audioSource;
132    SLDataLocator_URI          uri;
133    SLDataFormat_MIME          mime;
134
135    SLDataSink                 audioSink;
136    SLDataLocator_OutputMix    locator_outputmix;
137
138    SLObjectItf                player;
139    SLPlayItf                  playItf;
140    SLSeekItf                  seekItf;
141    SLPrefetchStatusItf        prefetchItf;
142
143    SLObjectItf                OutputMix;
144
145    SLboolean required[MAX_NUMBER_INTERFACES];
146    SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
147
148    /* Get the SL Engine Interface which is implicit */
149    res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);
150    CheckErr(res);
151
152    /* Initialize arrays required[] and iidArray[] */
153    for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
154        required[i] = SL_BOOLEAN_FALSE;
155        iidArray[i] = SL_IID_NULL;
156    }
157
158    required[0] = SL_BOOLEAN_TRUE;
159    iidArray[0] = SL_IID_VOLUME;
160    // Create Output Mix object to be used by player
161    res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
162            iidArray, required); CheckErr(res);
163
164    // Realizing the Output Mix object in synchronous mode.
165    res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE);
166    CheckErr(res);
167
168    /* Setup the data source structure for the URI */
169    uri.locatorType = SL_DATALOCATOR_URI;
170    uri.URI         =  (SLchar*) path;
171    mime.formatType    = SL_DATAFORMAT_MIME;
172    mime.mimeType      = (SLchar*)NULL;
173    mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
174
175    audioSource.pFormat      = (void *)&mime;
176    audioSource.pLocator     = (void *)&uri;
177
178    /* Setup the data sink structure */
179    locator_outputmix.locatorType   = SL_DATALOCATOR_OUTPUTMIX;
180    locator_outputmix.outputMix    = OutputMix;
181    audioSink.pLocator           = (void *)&locator_outputmix;
182    audioSink.pFormat            = NULL;
183
184    /* Create the audio player */
185    required[0] = SL_BOOLEAN_TRUE;
186    iidArray[0] = SL_IID_SEEK;
187    required[1] = SL_BOOLEAN_TRUE;
188    iidArray[1] = SL_IID_PREFETCHSTATUS;
189    res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
190            MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);
191
192    /* Realizing the player in synchronous mode. */
193    res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
194    fprintf(stdout, "URI example: after Realize\n");
195
196    /* Get interfaces */
197    res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf);
198    CheckErr(res);
199
200    res = (*player)->GetInterface(player, SL_IID_SEEK,  (void*)&seekItf);
201    CheckErr(res);
202
203    res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
204    CheckErr(res);
205    res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL);
206    CheckErr(res);
207    res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
208            SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE);
209    CheckErr(res);
210
211    /* Configure fill level updates every 5 percent */
212    (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50);
213
214    /* Set up the player callback to get head-at-end events */
215    res = (*playItf)->SetCallbackEventsMask(playItf, SL_PLAYEVENT_HEADATEND);
216    CheckErr(res);
217    res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, NULL);
218    CheckErr(res);
219
220    /* Display duration */
221    SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
222    res = (*playItf)->GetDuration(playItf, &durationInMsec);
223    CheckErr(res);
224    if (durationInMsec == SL_TIME_UNKNOWN) {
225        fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
226    } else {
227        fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n",
228                durationInMsec);
229    }
230
231    /* Loop on the whole of the content */
232    res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN);
233    CheckErr(res);
234
235    /* Play the URI */
236    /*     first cause the player to prefetch the data */
237    res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
238    CheckErr(res);
239
240    // wait for prefetch status callback to indicate either sufficient data or error
241    pthread_mutex_lock(&mutex);
242    while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) {
243        pthread_cond_wait(&cond, &mutex);
244    }
245    pthread_mutex_unlock(&mutex);
246    if (prefetch_status == SL_PREFETCHSTATUS_ERROR) {
247        fprintf(stderr, "Error during prefetch, exiting\n");
248        goto destroyRes;
249    }
250
251    /* Display duration again, */
252    res = (*playItf)->GetDuration(playItf, &durationInMsec);
253    CheckErr(res);
254    if (durationInMsec == SL_TIME_UNKNOWN) {
255        fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
256    } else {
257        fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
258    }
259
260    /* Start playing */
261    fprintf(stdout, "starting to play\n");
262    res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
263    CheckErr(res);
264
265    /* Wait as long as the duration of the content, times the repetitions,
266     * before stopping the loop */
267    usleep( (REPETITIONS-1) * durationInMsec * 1100);
268    res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN);
269    CheckErr(res);
270    fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
271    /* wait some more to make sure it doesn't repeat */
272    usleep(durationInMsec * 1000);
273
274    /* Stop playback */
275    fprintf(stdout, "stopping playback\n");
276    res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
277    CheckErr(res);
278
279destroyRes:
280
281    /* Destroy the player */
282    (*player)->Destroy(player);
283
284    /* Destroy Output Mix object */
285    (*OutputMix)->Destroy(OutputMix);
286}
287
288//-----------------------------------------------------------------
289int main(int argc, char* const argv[])
290{
291    SLresult    res;
292    SLObjectItf sl;
293
294    fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf ", argv[0]);
295    fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
296    fprintf(stdout, "Plays a sound and loops it %d times.\n\n", REPETITIONS);
297
298    if (argc == 1) {
299        fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]);
300        fprintf(stdout, "Example: \"%s /sdcard/my.mp3\"  or \"%s file:///sdcard/my.mp3\"\n",
301                argv[0], argv[0]);
302        exit(EXIT_FAILURE);
303    }
304
305    SLEngineOption EngineOption[] = {
306            {(SLuint32) SL_ENGINEOPTION_THREADSAFE,
307            (SLuint32) SL_BOOLEAN_TRUE}};
308
309    res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
310    CheckErr(res);
311    /* Realizing the SL Engine in synchronous mode. */
312    res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
313    CheckErr(res);
314
315    TestLoopUri(sl, argv[1]);
316
317    /* Shutdown OpenSL ES */
318    (*sl)->Destroy(sl);
319
320    return EXIT_SUCCESS;
321}
322