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
39 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
40 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
41 SLuint32 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
ExitOnErrorFunc(SLresult result,int line)53 void 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 */
PrefetchEventCallback(SLPrefetchStatusItf caller,void * pContext,SLuint32 event)63 void 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 */
PlayEventCallback(SLPlayItf caller __unused,void * pContext,SLuint32 event)104 void 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 */
TestLoopUri(SLObjectItf sl,const char * path)122 void TestLoopUri( SLObjectItf sl, const char* path)
123 {
124 SLEngineItf EngineItf;
125
126 SLresult res;
127
128 SLDataSource audioSource;
129 SLDataLocator_URI uri;
130 SLDataFormat_MIME mime;
131
132 SLDataSink audioSink;
133 SLDataLocator_OutputMix locator_outputmix;
134
135 SLObjectItf player;
136 SLPlayItf playItf;
137 SLSeekItf seekItf;
138 SLPrefetchStatusItf prefetchItf;
139
140 SLObjectItf OutputMix;
141
142 SLboolean required[MAX_NUMBER_INTERFACES];
143 SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
144
145 /* Get the SL Engine Interface which is implicit */
146 res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);
147 CheckErr(res);
148
149 /* Initialize arrays required[] and iidArray[] */
150 for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
151 required[i] = SL_BOOLEAN_FALSE;
152 iidArray[i] = SL_IID_NULL;
153 }
154
155 required[0] = SL_BOOLEAN_TRUE;
156 iidArray[0] = SL_IID_VOLUME;
157 // Create Output Mix object to be used by player
158 res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
159 iidArray, required); CheckErr(res);
160
161 // Realizing the Output Mix object in synchronous mode.
162 res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE);
163 CheckErr(res);
164
165 /* Setup the data source structure for the URI */
166 uri.locatorType = SL_DATALOCATOR_URI;
167 uri.URI = (SLchar*) path;
168 mime.formatType = SL_DATAFORMAT_MIME;
169 mime.mimeType = (SLchar*)NULL;
170 mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
171
172 audioSource.pFormat = (void *)&mime;
173 audioSource.pLocator = (void *)&uri;
174
175 /* Setup the data sink structure */
176 locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
177 locator_outputmix.outputMix = OutputMix;
178 audioSink.pLocator = (void *)&locator_outputmix;
179 audioSink.pFormat = NULL;
180
181 /* Create the audio player */
182 required[0] = SL_BOOLEAN_TRUE;
183 iidArray[0] = SL_IID_SEEK;
184 required[1] = SL_BOOLEAN_TRUE;
185 iidArray[1] = SL_IID_PREFETCHSTATUS;
186 res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
187 MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);
188
189 /* Realizing the player in synchronous mode. */
190 res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
191 fprintf(stdout, "URI example: after Realize\n");
192
193 /* Get interfaces */
194 res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf);
195 CheckErr(res);
196
197 res = (*player)->GetInterface(player, SL_IID_SEEK, (void*)&seekItf);
198 CheckErr(res);
199
200 res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
201 CheckErr(res);
202 res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL);
203 CheckErr(res);
204 res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
205 SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE);
206 CheckErr(res);
207
208 /* Configure fill level updates every 5 percent */
209 (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50);
210
211 /* Set up the player callback to get head-at-end events */
212 res = (*playItf)->SetCallbackEventsMask(playItf, SL_PLAYEVENT_HEADATEND);
213 CheckErr(res);
214 res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, NULL);
215 CheckErr(res);
216
217 /* Display duration */
218 SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
219 res = (*playItf)->GetDuration(playItf, &durationInMsec);
220 CheckErr(res);
221 if (durationInMsec == SL_TIME_UNKNOWN) {
222 fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
223 } else {
224 fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n",
225 durationInMsec);
226 }
227
228 /* Loop on the whole of the content */
229 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN);
230 CheckErr(res);
231
232 /* Play the URI */
233 /* first cause the player to prefetch the data */
234 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
235 CheckErr(res);
236
237 // wait for prefetch status callback to indicate either sufficient data or error
238 pthread_mutex_lock(&mutex);
239 while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) {
240 pthread_cond_wait(&cond, &mutex);
241 }
242 pthread_mutex_unlock(&mutex);
243 if (prefetch_status == SL_PREFETCHSTATUS_ERROR) {
244 fprintf(stderr, "Error during prefetch, exiting\n");
245 goto destroyRes;
246 }
247
248 /* Display duration again, */
249 res = (*playItf)->GetDuration(playItf, &durationInMsec);
250 CheckErr(res);
251 if (durationInMsec == SL_TIME_UNKNOWN) {
252 fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
253 } else {
254 fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
255 }
256
257 /* Start playing */
258 fprintf(stdout, "starting to play\n");
259 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
260 CheckErr(res);
261
262 /* Wait as long as the duration of the content, times the repetitions,
263 * before stopping the loop */
264 usleep( (REPETITIONS-1) * durationInMsec * 1100);
265 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN);
266 CheckErr(res);
267 fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
268 /* wait some more to make sure it doesn't repeat */
269 usleep(durationInMsec * 1000);
270
271 /* Stop playback */
272 fprintf(stdout, "stopping playback\n");
273 res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
274 CheckErr(res);
275
276 destroyRes:
277
278 /* Destroy the player */
279 (*player)->Destroy(player);
280
281 /* Destroy Output Mix object */
282 (*OutputMix)->Destroy(OutputMix);
283 }
284
285 //-----------------------------------------------------------------
main(int argc,char * const argv[])286 int main(int argc, char* const argv[])
287 {
288 SLresult res;
289 SLObjectItf sl;
290
291 fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf ", argv[0]);
292 fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
293 fprintf(stdout, "Plays a sound and loops it %d times.\n\n", REPETITIONS);
294
295 if (argc == 1) {
296 fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]);
297 fprintf(stdout, "Example: \"%s /sdcard/my.mp3\" or \"%s file:///sdcard/my.mp3\"\n",
298 argv[0], argv[0]);
299 exit(EXIT_FAILURE);
300 }
301
302 SLEngineOption EngineOption[] = {
303 {(SLuint32) SL_ENGINEOPTION_THREADSAFE,
304 (SLuint32) SL_BOOLEAN_TRUE}};
305
306 res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
307 CheckErr(res);
308 /* Realizing the SL Engine in synchronous mode. */
309 res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
310 CheckErr(res);
311
312 TestLoopUri(sl, argv[1]);
313
314 /* Shutdown OpenSL ES */
315 (*sl)->Destroy(sl);
316
317 return EXIT_SUCCESS;
318 }
319