slesTestSlowDownUri.cpp revision c6853892c94800e72c0bd676d5d2136d48cea76e 
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
36void ExitOnErrorFunc( SLresult result , int line)
37{
38    if (SL_RESULT_SUCCESS != result) {
39        fprintf(stderr, "%u 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 */
46void 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 */
83void 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 %u\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 = %u\n", status);
100    }
101
102}
103
104
105//-----------------------------------------------------------------
106
107/* Play some music from a URI  */
108void 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 %u 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 %u 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
266destroyRes:
267
268    /* Destroy the player */
269    (*player)->Destroy(player);
270
271    /* Destroy Output Mix object */
272    (*OutputMix)->Destroy(OutputMix);
273}
274
275//-----------------------------------------------------------------
276int 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