/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* Audio Record Test
First run the program from shell:
# slesTest_recBuffQueue /sdcard/myrec.raw 4
These use adb on host to retrive the file:
% adb pull /sdcard/myrec.raw myrec.raw
How to examine the output with Audacity:
Project / Import raw data
Select myrec.raw file, then click Open button
Choose these options:
Signed 16-bit PCM
Little-endian
1 Channel (Mono)
Sample rate 22050 Hz
Click Import button
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <fcntl.h>
#include "OpenSLES.h"
#include "OpenSLES_Android.h"
#include "OpenSLES_AndroidConfiguration.h"
/* Explicitly requesting SL_IID_ANDROIDSIMPLEBUFFERQUEUE and SL_IID_ANDROIDCONFIGURATION
* on the AudioRecorder object */
#define NUM_EXPLICIT_INTERFACES_FOR_RECORDER 2
/* Size of the recording buffer queue */
#define NB_BUFFERS_IN_QUEUE 1
/* Size of each buffer in the queue */
#define BUFFER_SIZE_IN_SAMPLES 1024
#define BUFFER_SIZE_IN_BYTES (2*BUFFER_SIZE_IN_SAMPLES)
/* Local storage for Audio data */
int8_t pcmData[NB_BUFFERS_IN_QUEUE * BUFFER_SIZE_IN_BYTES];
/* destination for recorded data */
static FILE* gFp;
//-----------------------------------------------------------------
/* Exits the application if an error is encountered */
#define ExitOnError(x) ExitOnErrorFunc(x,__LINE__)
void ExitOnErrorFunc( SLresult result , int line)
{
if (SL_RESULT_SUCCESS != result) {
fprintf(stdout, "%lu error code encountered at line %d, exiting\n", result, line);
exit(EXIT_FAILURE);
}
}
//-----------------------------------------------------------------
/* Structure for passing information to callback function */
typedef struct CallbackCntxt_ {
SLPlayItf playItf;
SLuint32 size;
SLint8* pDataBase; // Base address of local audio data storage
SLint8* pData; // Current address of local audio data storage
} CallbackCntxt;
//-----------------------------------------------------------------
/* Callback for recording buffer queue events */
void RecCallback(
SLRecordItf caller,
void *pContext,
SLuint32 event)
{
if (SL_RECORDEVENT_HEADATNEWPOS & event) {
SLmillisecond pMsec = 0;
(*caller)->GetPosition(caller, &pMsec);
fprintf(stdout, "SL_RECORDEVENT_HEADATNEWPOS current position=%lums\n", pMsec);
}
if (SL_RECORDEVENT_HEADATMARKER & event) {
SLmillisecond pMsec = 0;
(*caller)->GetPosition(caller, &pMsec);
fprintf(stdout, "SL_RECORDEVENT_HEADATMARKER current position=%lums\n", pMsec);
}
}
//-----------------------------------------------------------------
/* Callback for recording buffer queue events */
void RecBufferQueueCallback(
SLAndroidSimpleBufferQueueItf queueItf,
void *pContext)
{
//fprintf(stdout, "RecBufferQueueCallback called\n");
CallbackCntxt *pCntxt = (CallbackCntxt*)pContext;
/* Save the recorded data */
fwrite(pCntxt->pDataBase, BUFFER_SIZE_IN_BYTES, 1, gFp);
/* Increase data pointer by buffer size */
pCntxt->pData += BUFFER_SIZE_IN_BYTES;
if (pCntxt->pData >= pCntxt->pDataBase + (NB_BUFFERS_IN_QUEUE * BUFFER_SIZE_IN_BYTES)) {
pCntxt->pData = pCntxt->pDataBase;
}
ExitOnError( (*queueItf)->Enqueue(queueItf, pCntxt->pDataBase, BUFFER_SIZE_IN_BYTES) );
SLAndroidSimpleBufferQueueState recQueueState;
ExitOnError( (*queueItf)->GetState(queueItf, &recQueueState) );
/*fprintf(stderr, "\tRecBufferQueueCallback now has pCntxt->pData=%p queue: "
"count=%lu playIndex=%lu\n",
pCntxt->pData, recQueueState.count, recQueueState.index);*/
}
//-----------------------------------------------------------------
/* Play an audio path by opening a file descriptor on that path */
void TestRecToBuffQueue( SLObjectItf sl, const char* path, SLAint64 durationInSeconds)
{
gFp = fopen(path, "w");
if (NULL == gFp) {
ExitOnError(SL_RESULT_RESOURCE_ERROR);
}
SLresult result;
SLEngineItf EngineItf;
/* Objects this application uses: one audio recorder */
SLObjectItf recorder;
/* Interfaces for the audio recorder */
SLAndroidSimpleBufferQueueItf recBuffQueueItf;
SLRecordItf recordItf;
SLAndroidConfigurationItf configItf;
/* Source of audio data for the recording */
SLDataSource recSource;
SLDataLocator_IODevice ioDevice;
/* Data sink for recorded audio */
SLDataSink recDest;
SLDataLocator_AndroidSimpleBufferQueue recBuffQueue;
SLDataFormat_PCM pcm;
SLboolean required[NUM_EXPLICIT_INTERFACES_FOR_RECORDER];
SLInterfaceID iidArray[NUM_EXPLICIT_INTERFACES_FOR_RECORDER];
/* Get the SL Engine Interface which is implicit */
result = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf);
ExitOnError(result);
/* Initialize arrays required[] and iidArray[] */
for (int i=0 ; i < NUM_EXPLICIT_INTERFACES_FOR_RECORDER ; i++) {
required[i] = SL_BOOLEAN_FALSE;
iidArray[i] = SL_IID_NULL;
}
/* ------------------------------------------------------ */
/* Configuration of the recorder */
/* Request the AndroidSimpleBufferQueue and AndroidConfiguration interfaces */
required[0] = SL_BOOLEAN_TRUE;
iidArray[0] = SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
required[1] = SL_BOOLEAN_TRUE;
iidArray[1] = SL_IID_ANDROIDCONFIGURATION;
/* Setup the data source */
ioDevice.locatorType = SL_DATALOCATOR_IODEVICE;
ioDevice.deviceType = SL_IODEVICE_AUDIOINPUT;
ioDevice.deviceID = SL_DEFAULTDEVICEID_AUDIOINPUT;
ioDevice.device = NULL;
recSource.pLocator = (void *) &ioDevice;
/* Setup the data sink */
recBuffQueue.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
recBuffQueue.numBuffers = NB_BUFFERS_IN_QUEUE;
/* set up the format of the data in the buffer queue */
pcm.formatType = SL_DATAFORMAT_PCM;
pcm.numChannels = 1;
pcm.samplesPerSec = SL_SAMPLINGRATE_22_05;
pcm.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
pcm.containerSize = 16;
pcm.channelMask = SL_SPEAKER_FRONT_LEFT;
pcm.endianness = SL_BYTEORDER_LITTLEENDIAN;
recDest.pLocator = (void *) &recBuffQueue;
recDest.pFormat = (void * ) &pcm;
/* Create the audio recorder */
result = (*EngineItf)->CreateAudioRecorder(EngineItf, &recorder, &recSource, &recDest,
NUM_EXPLICIT_INTERFACES_FOR_RECORDER, iidArray, required);
ExitOnError(result);
fprintf(stdout, "Recorder created\n");
/* Get the Android configuration interface which is explicit */
result = (*recorder)->GetInterface(recorder, SL_IID_ANDROIDCONFIGURATION, (void*)&configItf);
ExitOnError(result);
/* Use the configuration interface to configure the recorder before it's realized */
SLuint32 presetValue = SL_ANDROID_RECORDING_PRESET_CAMCORDER;
result = (*configItf)->SetConfiguration(configItf, SL_ANDROID_KEY_RECORDING_PRESET,
&presetValue, sizeof(SLuint32));
ExitOnError(result);
fprintf(stdout, "Recorder parametrized\n");
presetValue = SL_ANDROID_RECORDING_PRESET_NONE;
SLuint32 presetSize = 2*sizeof(SLuint32); // intentionally too big
result = (*configItf)->GetConfiguration(configItf, SL_ANDROID_KEY_RECORDING_PRESET,
&presetSize, (void*)&presetValue);
ExitOnError(result);
if (presetValue != SL_ANDROID_RECORDING_PRESET_CAMCORDER) {
fprintf(stderr, "Error retrieved recording preset\n");
ExitOnError(SL_RESULT_INTERNAL_ERROR);
}
/* Realize the recorder in synchronous mode. */
result = (*recorder)->Realize(recorder, SL_BOOLEAN_FALSE);
ExitOnError(result);
fprintf(stdout, "Recorder realized\n");
/* Get the record interface which is implicit */
result = (*recorder)->GetInterface(recorder, SL_IID_RECORD, (void*)&recordItf);
ExitOnError(result);
/* Set up the recorder callback to get events during the recording */
result = (*recordItf)->SetMarkerPosition(recordItf, 2000);
ExitOnError(result);
result = (*recordItf)->SetPositionUpdatePeriod(recordItf, 500);
ExitOnError(result);
result = (*recordItf)->SetCallbackEventsMask(recordItf,
SL_RECORDEVENT_HEADATMARKER | SL_RECORDEVENT_HEADATNEWPOS);
ExitOnError(result);
result = (*recordItf)->RegisterCallback(recordItf, RecCallback, NULL);
ExitOnError(result);
fprintf(stdout, "Recorder callback registered\n");
/* Get the buffer queue interface which was explicitly requested */
result = (*recorder)->GetInterface(recorder, SL_IID_ANDROIDSIMPLEBUFFERQUEUE,
(void*)&recBuffQueueItf);
ExitOnError(result);
/* ------------------------------------------------------ */
/* Initialize the callback and its context for the recording buffer queue */
CallbackCntxt cntxt;
cntxt.pDataBase = (int8_t*)&pcmData;
cntxt.pData = cntxt.pDataBase;
cntxt.size = sizeof(pcmData);
result = (*recBuffQueueItf)->RegisterCallback(recBuffQueueItf, RecBufferQueueCallback, &cntxt);
ExitOnError(result);
/* Enqueue buffers to map the region of memory allocated to store the recorded data */
fprintf(stdout,"Enqueueing buffer ");
for(int i = 0 ; i < NB_BUFFERS_IN_QUEUE ; i++) {
fprintf(stdout,"%d ", i);
result = (*recBuffQueueItf)->Enqueue(recBuffQueueItf, cntxt.pData, BUFFER_SIZE_IN_BYTES);
ExitOnError(result);
cntxt.pData += BUFFER_SIZE_IN_BYTES;
}
fprintf(stdout,"\n");
cntxt.pData = cntxt.pDataBase;
/* ------------------------------------------------------ */
/* Start recording */
result = (*recordItf)->SetRecordState(recordItf, SL_RECORDSTATE_RECORDING);
ExitOnError(result);
fprintf(stdout, "Starting to record\n");
/* Record for at least a second */
if (durationInSeconds < 1) {
durationInSeconds = 1;
}
usleep(durationInSeconds * 1000 * 1000);
/* ------------------------------------------------------ */
/* End of recording */
/* Stop recording */
result = (*recordItf)->SetRecordState(recordItf, SL_RECORDSTATE_STOPPED);
ExitOnError(result);
fprintf(stdout, "Stopped recording\n");
/* Destroy the AudioRecorder object */
(*recorder)->Destroy(recorder);
fclose(gFp);
}
//-----------------------------------------------------------------
int main(int argc, char* const argv[])
{
SLresult result;
SLObjectItf sl;
fprintf(stdout, "OpenSL ES test %s: exercises SLRecordItf and SLAndroidSimpleBufferQueueItf ",
argv[0]);
fprintf(stdout, "on an AudioRecorder object\n");
if (argc < 2) {
fprintf(stdout, "Usage: \t%s destination_file duration_in_seconds\n", argv[0]);
fprintf(stdout, "Example: \"%s /sdcard/myrec.raw 4\" \n", argv[0]);
exit(EXIT_FAILURE);
}
SLEngineOption EngineOption[] = {
{(SLuint32) SL_ENGINEOPTION_THREADSAFE, (SLuint32) SL_BOOLEAN_TRUE}
};
result = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL);
ExitOnError(result);
/* Realizing the SL Engine in synchronous mode. */
result = (*sl)->Realize(sl, SL_BOOLEAN_FALSE);
ExitOnError(result);
TestRecToBuffQueue(sl, argv[1], (SLAint64)atoi(argv[2]));
/* Shutdown OpenSL ES */
(*sl)->Destroy(sl);
return EXIT_SUCCESS;
}