slesTestPlayStream.cpp revision fa62f9f2c20b446178c05e3e92407fe5dfdbf8a1 
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
18#include <stdlib.h>
19#include <stdio.h>
20//#include <string.h>
21#include <unistd.h>
22//#include <sys/time.h>
23
24#include "SLES/OpenSLES.h"
25#include "SLES/OpenSLES_Android.h"
26
27
28#define MAX_NUMBER_INTERFACES 2
29
30#define PREFETCHEVENT_ERROR_CANDIDATE \
31        (SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
32
33FILE *file;
34
35//-----------------------------------------------------------------
36//* Exits the application if an error is encountered */
37#define CheckErr(x) ExitOnErrorFunc(x,__LINE__)
38
39void ExitOnErrorFunc( SLresult result , int line)
40{
41    if (SL_RESULT_SUCCESS != result) {
42        fprintf(stderr, "%lu error code encountered at line %d, exiting\n", result, line);
43        exit(EXIT_FAILURE);
44    }
45}
46
47bool prefetchError = false;
48
49
50//-----------------------------------------------------------------
51/* AndroidBufferQueueItf callback for an audio player */
52SLresult AndroidBufferQueueCallback(
53        SLAndroidBufferQueueItf caller,
54            void *pContext,
55            SLuint32 bufferId,
56            SLAint64 bufferLength,
57            void *pBufferDataLocation)
58
59{
60    fprintf(stdout, "AndroidBufferQueueCallback called\n");
61
62    size_t nbRead = fread(pBufferDataLocation, 1, bufferLength, file);
63
64    SLAbufferQueueEvent event = SL_ANDROIDBUFFERQUEUE_EVENT_NONE;
65    if (nbRead <= 0) {
66        event = SL_ANDROIDBUFFERQUEUE_EVENT_EOS;
67    } else {
68        event = SL_ANDROIDBUFFERQUEUE_EVENT_NONE; // no event to report
69    }
70
71    // enqueue the data right-away because in this example we're reading from a file, so we
72    // can afford to do that. When streaming from the network, we would write from our cache
73    // to this queue.
74    // last param is NULL because we've already written the data in the buffer queue
75    (*caller)->Enqueue(caller, bufferId, nbRead, event, NULL);
76
77    return SL_RESULT_SUCCESS;
78}
79
80
81//-----------------------------------------------------------------
82
83/* Play some music from a URI  */
84void TestPlayStream( SLObjectItf sl, const char* path)
85{
86    SLEngineItf                EngineItf;
87
88    SLint32                    numOutputs = 0;
89    SLuint32                   deviceID = 0;
90
91    SLresult                   res;
92
93    SLDataSource               audioSource;
94    SLDataLocator_AndroidBufferQueue streamLocator;
95    SLDataFormat_MIME          mime;
96
97    SLDataSink                 audioSink;
98    SLDataLocator_OutputMix    locator_outputmix;
99
100    SLObjectItf                player;
101    SLPlayItf                  playItf;
102    SLVolumeItf                volItf;
103    SLAndroidBufferQueueItf    abqItf;
104
105    SLObjectItf                OutputMix;
106
107    SLboolean required[MAX_NUMBER_INTERFACES];
108    SLInterfaceID iidArray[MAX_NUMBER_INTERFACES];
109
110    file = fopen(path, "rb");
111
112    /* Get the SL Engine Interface which is implicit */
113    res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);
114    CheckErr(res);
115
116    /* Initialize arrays required[] and iidArray[] */
117    for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) {
118        required[i] = SL_BOOLEAN_FALSE;
119        iidArray[i] = SL_IID_NULL;
120    }
121
122    // Set arrays required[] and iidArray[] for VOLUME and PREFETCHSTATUS interface
123    required[0] = SL_BOOLEAN_TRUE;
124    iidArray[0] = SL_IID_VOLUME;
125    required[1] = SL_BOOLEAN_TRUE;
126    iidArray[1] = SL_IID_ANDROIDBUFFERQUEUE;
127    // Create Output Mix object to be used by player
128    res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0,
129            iidArray, required); CheckErr(res);
130
131    // Realizing the Output Mix object in synchronous mode.
132    res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE);
133    CheckErr(res);
134
135    /* Setup the data source structure for the URI */
136    streamLocator.locatorType  = SL_DATALOCATOR_ANDROIDBUFFERQUEUE;
137    streamLocator.numBuffers   = 0; // ignored at the moment
138    streamLocator.queueSize    = 0; // ignored at the moment
139    mime.formatType    = SL_DATAFORMAT_MIME;
140    mime.mimeType      = (SLchar*)NULL;
141    mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED;
142
143    audioSource.pFormat      = (void *)&mime;
144    audioSource.pLocator     = (void *)&streamLocator;
145
146    /* Setup the data sink structure */
147    locator_outputmix.locatorType   = SL_DATALOCATOR_OUTPUTMIX;
148    locator_outputmix.outputMix    = OutputMix;
149    audioSink.pLocator           = (void *)&locator_outputmix;
150    audioSink.pFormat            = NULL;
151
152    /* Create the audio player */
153    res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink,
154            MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res);
155
156    /* Realizing the player in synchronous mode. */
157    res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res);
158    fprintf(stdout, "URI example: after Realize\n");
159
160    /* Get interfaces */
161    res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); CheckErr(res);
162
163    res = (*player)->GetInterface(player, SL_IID_VOLUME,  (void*)&volItf); CheckErr(res);
164
165    res = (*player)->GetInterface(player, SL_IID_ANDROIDBUFFERQUEUE, (void*)&abqItf);
166    CheckErr(res);
167    res = (*abqItf)->RegisterCallback(abqItf, AndroidBufferQueueCallback,
168            &abqItf); CheckErr(res);
169
170    /* Display duration */
171    SLmillisecond durationInMsec = SL_TIME_UNKNOWN;
172    res = (*playItf)->GetDuration(playItf, &durationInMsec);
173    CheckErr(res);
174    if (durationInMsec == SL_TIME_UNKNOWN) {
175        fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n");
176    } else {
177        fprintf(stdout, "Content duration is %lu ms (before starting to prefetch)\n",
178                durationInMsec);
179    }
180
181    /* Set the player volume */
182    res = (*volItf)->SetVolumeLevel( volItf, 0);//-300);
183    CheckErr(res);
184
185    /* Play the URI */
186    /*     first cause the player to prefetch the data */
187    fprintf(stdout, "Before set to PAUSED\n");
188    res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED );
189    fprintf(stdout, "After set to PAUSED\n");
190    CheckErr(res);
191
192    /*     wait until there's data to play */
193    //SLpermille fillLevel = 0;
194 /*   SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
195    SLuint32 timeOutIndex = 2;
196    while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0) &&
197            !prefetchError) {
198        usleep(1 * 1000 * 1000); // 1s
199        //(*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
200        timeOutIndex--;
201    }
202
203    if (timeOutIndex == 0 || prefetchError) {
204        fprintf(stderr, "We\'re done waiting, failed to prefetch data in time, exiting\n");
205        goto destroyRes;
206    }*/
207
208    /* Display duration again, */
209    res = (*playItf)->GetDuration(playItf, &durationInMsec);
210    CheckErr(res);
211    if (durationInMsec == SL_TIME_UNKNOWN) {
212        fprintf(stdout, "Content duration is unknown (after prefetch completed)\n");
213    } else {
214        fprintf(stdout, "Content duration is %lu ms (after prefetch completed)\n", durationInMsec);
215    }
216
217    fprintf(stdout, "URI example: starting to play\n");
218    res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING );
219    CheckErr(res);
220
221    /* Wait as long as the duration of the content before stopping */
222    //usleep(durationInMsec * 1000);
223    usleep(30 /*s*/ * 1000 * 1000);
224
225
226    /* Make sure player is stopped */
227    fprintf(stdout, "URI example: stopping playback\n");
228    res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED);
229    CheckErr(res);
230
231destroyRes:
232
233    /* Destroy the player */
234    (*player)->Destroy(player);
235
236    /* Destroy Output Mix object */
237    (*OutputMix)->Destroy(OutputMix);
238
239    fclose(file);
240}
241
242//-----------------------------------------------------------------
243int main(int argc, char* const argv[])
244{
245    SLresult    res;
246    SLObjectItf sl;
247
248    fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLVolumeItf, SLAndroidBufferQueue \n",
249            argv[0]);
250    fprintf(stdout, "and AudioPlayer with SL_DATALOCATOR_ANDROIDBUFFERQUEUE source / OutputMix sink\n");
251    fprintf(stdout, "Plays a sound and stops after its reported duration\n\n");
252
253    if (argc == 1) {
254        fprintf(stdout, "Usage: %s path \n\t%s url\n", argv[0], argv[0]);
255        fprintf(stdout, "Example: \"%s /sdcard/my.mp3\"  or \"%s file:///sdcard/my.mp3\"\n",
256                argv[0], argv[0]);
257        exit(EXIT_FAILURE);
258    }
259
260    SLEngineOption EngineOption[] = {
261            {(SLuint32) SL_ENGINEOPTION_THREADSAFE,
262            (SLuint32) SL_BOOLEAN_TRUE}};
263
264    res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
265    CheckErr(res);
266    /* Realizing the SL Engine in synchronous mode. */
267    res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
268    CheckErr(res);
269
270    TestPlayStream(sl, argv[1]);
271
272    /* Shutdown OpenSL ES */
273    (*sl)->Destroy(sl);
274
275    return EXIT_SUCCESS;
276}
277