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 3
27
28 #define REPETITIONS 4 // 4 repetitions, but will stop the looping before the end
29
30 #define INITIAL_RATE 2000 // 2x normal playback speed
31
32 //-----------------------------------------------------------------
33 //* Exits the application if an error is encountered */
34 #define CheckErr(x) ExitOnErrorFunc(x,__LINE__)
35
ExitOnErrorFunc(SLresult result,int line)36 void ExitOnErrorFunc( SLresult result , int line)
37 {
38 if (SL_RESULT_SUCCESS != result) {
39 fprintf(stderr, "%lu error code encountered at line %d, exiting\n", result, line);
40 exit(EXIT_FAILURE);
41 }
42 }
43
44 //-----------------------------------------------------------------
45 /* PlayItf callback for an audio player */
PlayEventCallback(SLPlayItf caller,void * pContext,SLuint32 event)46 void PlayEventCallback( SLPlayItf caller, void *pContext, SLuint32 event)
47 {
48 fprintf(stdout, "PlayEventCallback event = ");
49 if (event & SL_PLAYEVENT_HEADATEND) {
50 fprintf(stdout, "SL_PLAYEVENT_HEADATEND \n");
51 /* slow playback down by 2x for next loop, if possible */
52 SLpermille minRate, maxRate, stepSize, rate = 1000;
53 SLuint32 capa;
54 SLPlaybackRateItf* pRateItf = (SLPlaybackRateItf*)pContext;
55 SLresult res = (**pRateItf)->GetRate(*pRateItf, &rate); CheckErr(res);
56 res = (**pRateItf)->GetRateRange(*pRateItf, 0, &minRate, &maxRate, &stepSize, &capa);
57 CheckErr(res);
58 fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate);
59 rate /= 2;
60 if (rate < minRate) {
61 rate = minRate;
62 }
63 fprintf(stdout, "new rate = %d\n", rate);
64 res = (**pRateItf)->SetRate(*pRateItf, rate); CheckErr(res);
65 }
66 if (event & SL_PLAYEVENT_HEADATMARKER) {
67 fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER ");
68 }
69 if (event & SL_PLAYEVENT_HEADATNEWPOS) {
70 fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS ");
71 }
72 if (event & SL_PLAYEVENT_HEADMOVING) {
73 fprintf(stdout, "SL_PLAYEVENT_HEADMOVING ");
74 }
75 if (event & SL_PLAYEVENT_HEADSTALLED) {
76 fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED");
77 }
78 fprintf(stdout, "\n");
79 }
80
81 //-----------------------------------------------------------------
82 /* PrefetchStatusItf callback for an audio player */
PrefetchEventCallback(SLPrefetchStatusItf caller,void * pContext,SLuint32 event)83 void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event)
84 {
85 SLpermille level = 0;
86 (*caller)->GetFillLevel(caller, &level);
87 SLuint32 status;
88 //fprintf(stdout, "\t\tPrefetchEventCallback: received event %lu\n", event);
89 (*caller)->GetPrefetchStatus(caller, &status);
90 if ((event & (SL_PREFETCHEVENT_STATUSCHANGE|SL_PREFETCHEVENT_FILLLEVELCHANGE))
91 && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) {
92 fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
93 //exit(EXIT_FAILURE);
94 }
95 if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
96 fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
97 }
98 if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
99 fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %lu\n", status);
100 }
101
102 }
103
104
105 //-----------------------------------------------------------------
106
107 /* Play some music from a URI */
TestSlowDownUri(SLObjectItf sl,const char * path)108 void TestSlowDownUri( SLObjectItf sl, const char* path)
109 {
110 SLEngineItf EngineItf;
111
112 SLint32 numOutputs = 0;
113 SLuint32 deviceID = 0;
114
115 SLresult res;
116
117 SLDataSource audioSource;
118 SLDataLocator_URI uri;
119 SLDataFormat_MIME mime;
120
121 SLDataSink audioSink;
122 SLDataLocator_OutputMix locator_outputmix;
123
124 SLObjectItf player;
125 SLPlayItf playItf;
126 SLSeekItf seekItf;
127 SLPrefetchStatusItf prefetchItf;
128 SLPlaybackRateItf rateItf;
129
130 SLObjectItf OutputMix;
131
132 SLboolean required[MAX_NUMBER_INTERFACES];
133 SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
134
135 /* Get the SL Engine Interface which is implicit */
136 res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); CheckErr(res);
137
138 /* Initialize arrays required[] and iidArray[] */
139 for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
140 required[i] = SL_BOOLEAN_FALSE;
141 iidArray[i] = SL_IID_NULL;
142 }
143
144 required[0] = SL_BOOLEAN_TRUE;
145 iidArray[0] = SL_IID_VOLUME;
146 // Create Output Mix object to be used by player
147 res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
148 iidArray, required); CheckErr(res);
149
150 // Realizing the Output Mix object in synchronous mode.
151 res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE); CheckErr(res);
152
153 /* Setup the data source structure for the URI */
154 uri.locatorType = SL_DATALOCATOR_URI;
155 uri.URI = (SLchar*) path;
156 mime.formatType = SL_DATAFORMAT_MIME;
157 mime.mimeType = (SLchar*)NULL;
158 mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
159
160 audioSource.pFormat = (void *)&mime;
161 audioSource.pLocator = (void *)&uri;
162
163 /* Setup the data sink structure */
164 locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
165 locator_outputmix.outputMix = OutputMix;
166 audioSink.pLocator = (void *)&locator_outputmix;
167 audioSink.pFormat = NULL;
168
169 /******************************************************/
170 /* Create the audio player */
171 required[0] = SL_BOOLEAN_TRUE;
172 iidArray[0] = SL_IID_SEEK;
173 required[1] = SL_BOOLEAN_TRUE;
174 iidArray[1] = SL_IID_PREFETCHSTATUS;
175 required[2] = SL_BOOLEAN_TRUE;
176 iidArray[2] = SL_IID_PLAYBACKRATE;
177 res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
178 MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);
179
180 /* Realizing the player in synchronous mode. */
181 res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
182 fprintf(stdout, "URI example: after Realize\n");
183
184 /* Get interfaces */
185 res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); CheckErr(res);
186
187 res = (*player)->GetInterface(player, SL_IID_SEEK, (void*)&seekItf); CheckErr(res);
188
189 res = (*player)->GetInterface(player, SL_IID_PLAYBACKRATE, (void*)&rateItf); CheckErr(res);
190
191 res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
192 CheckErr(res);
193 res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, &prefetchItf);
194 CheckErr(res);
195 res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
196 SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE); CheckErr(res);
197
198 /* Configure fill level updates every 5 percent */
199 (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50); CheckErr(res);
200
201 /* Display duration */
202 SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
203 res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res);
204 if (durationInMsec == SL_TIME_UNKNOWN) {
205 fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
206 } else {
207 fprintf(stdout, "Content duration is %lu ms (before starting to prefetch)\n",
208 durationInMsec);
209 }
210
211 /* Loop on the whole of the content */
212 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN); CheckErr(res);
213
214 /* Set up marker and position callbacks */
215 res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, &rateItf); CheckErr(res);
216 res = (*playItf)->SetCallbackEventsMask(playItf,
217 SL_PLAYEVENT_HEADATEND | SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS);
218 res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res);
219 res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res);
220
221 /* Change the playback rate before playback */
222 res = (*rateItf)->SetRate(rateItf, INITIAL_RATE); CheckErr(res);
223
224 /******************************************************/
225 /* Play the URI */
226 /* first cause the player to prefetch the data */
227 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res);
228
229 /* wait until there's data to play */
230 SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
231 SLuint32 timeOutIndex = 100; // 10s
232 while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0)) {
233 usleep(100 * 1000);
234 (*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
235 timeOutIndex--;
236 }
237
238 if (timeOutIndex == 0) {
239 fprintf(stderr, "\nWe\'re done waiting, failed to prefetch data in time, exiting\n");
240 goto destroyRes;
241 }
242
243 /* Display duration again, */
244 res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res);
245 if (durationInMsec == SL_TIME_UNKNOWN) {
246 fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
247 } else {
248 fprintf(stdout, "Content duration is %lu ms (after prefetch completed)\n", durationInMsec);
249 }
250
251 fprintf(stdout, "starting to play\n");
252 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res);
253
254 /* Wait as long as the duration of the content, times the repetitions,
255 * before stopping the loop */
256 usleep( (REPETITIONS-1) * durationInMsec * 1100);
257 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN); CheckErr(res);
258 fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
259 /* wait some more to make sure it doesn't repeat */
260 usleep(durationInMsec * 1000);
261
262 /* Stop playback */
263 fprintf(stdout, "stopping playback\n");
264 res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); CheckErr(res);
265
266 destroyRes:
267
268 /* Destroy the player */
269 (*player)->Destroy(player);
270
271 /* Destroy Output Mix object */
272 (*OutputMix)->Destroy(OutputMix);
273 }
274
275 //-----------------------------------------------------------------
main(int argc,char * const argv[])276 int main(int argc, char* const argv[])
277 {
278 SLresult res;
279 SLObjectItf sl;
280
281 fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf, SLPlaybackRateItf\n",
282 argv[0]);
283 fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n");
284 fprintf(stdout, "Plays a sound and loops it %d times while changing the \n", REPETITIONS);
285 fprintf(stdout, "playback rate each time.\n\n");
286
287 if (argc == 1) {
288 fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]);
289 fprintf(stdout, "Example: \"%s /sdcard/my.mp3\" or \"%s file:///sdcard/my.mp3\"\n",
290 argv[0], argv[0]);
291 return EXIT_FAILURE;
292 }
293
294 SLEngineOption EngineOption[] = {
295 {(SLuint32) SL_ENGINEOPTION_THREADSAFE,
296 (SLuint32) SL_BOOLEAN_TRUE}};
297
298 res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
299 CheckErr(res);
300 /* Realizing the SL Engine in synchronous mode. */
301 res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
302 CheckErr(res);
303
304 TestSlowDownUri(sl, argv[1]);
305
306 /* Shutdown OpenSL ES */
307 (*sl)->Destroy(sl);
308
309 return EXIT_SUCCESS;
310 }
311