/*
* 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.
*/
// Test various buffer queue configurations
#include <assert.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <SLES/OpenSLES.h>
typedef struct {
SLuint8 numChannels;
SLuint32 milliHz;
SLuint8 bitsPerSample;
} PCM;
PCM formats[] = {
{1, SL_SAMPLINGRATE_8, 8},
{2, SL_SAMPLINGRATE_8, 8},
{1, SL_SAMPLINGRATE_8, 16},
{2, SL_SAMPLINGRATE_8, 16},
{1, SL_SAMPLINGRATE_11_025, 8},
{2, SL_SAMPLINGRATE_11_025, 8},
{1, SL_SAMPLINGRATE_11_025, 16},
{2, SL_SAMPLINGRATE_11_025, 16},
{1, SL_SAMPLINGRATE_12, 8},
{2, SL_SAMPLINGRATE_12, 8},
{1, SL_SAMPLINGRATE_12, 16},
{2, SL_SAMPLINGRATE_12, 16},
{1, SL_SAMPLINGRATE_16, 8},
{2, SL_SAMPLINGRATE_16, 8},
{1, SL_SAMPLINGRATE_16, 16},
{2, SL_SAMPLINGRATE_16, 16},
{1, SL_SAMPLINGRATE_22_05, 8},
{2, SL_SAMPLINGRATE_22_05, 8},
{1, SL_SAMPLINGRATE_22_05, 16},
{2, SL_SAMPLINGRATE_22_05, 16},
{1, SL_SAMPLINGRATE_24, 8},
{2, SL_SAMPLINGRATE_24, 8},
{1, SL_SAMPLINGRATE_24, 16},
{2, SL_SAMPLINGRATE_24, 16},
{1, SL_SAMPLINGRATE_32, 8},
{2, SL_SAMPLINGRATE_32, 8},
{1, SL_SAMPLINGRATE_32, 16},
{2, SL_SAMPLINGRATE_32, 16},
{1, SL_SAMPLINGRATE_44_1, 8},
{2, SL_SAMPLINGRATE_44_1, 8},
{1, SL_SAMPLINGRATE_44_1, 16},
{2, SL_SAMPLINGRATE_44_1, 16},
{1, SL_SAMPLINGRATE_48, 8},
{2, SL_SAMPLINGRATE_48, 8},
{1, SL_SAMPLINGRATE_48, 16},
{2, SL_SAMPLINGRATE_48, 16},
{0, 0, 0}
};
int main(int argc, char **argv)
{
SLresult result;
SLObjectItf engineObject;
// create engine
result = slCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);
assert(SL_RESULT_SUCCESS == result);
SLEngineItf engineEngine;
result = (*engineObject)->Realize(engineObject, SL_BOOLEAN_FALSE);
assert(SL_RESULT_SUCCESS == result);
result = (*engineObject)->GetInterface(engineObject, SL_IID_ENGINE, &engineEngine);
assert(SL_RESULT_SUCCESS == result);
// create output mix
SLObjectItf outputMixObject;
result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 0, NULL, NULL);
assert(SL_RESULT_SUCCESS == result);
result = (*outputMixObject)->Realize(outputMixObject, SL_BOOLEAN_FALSE);
assert(SL_RESULT_SUCCESS == result);
// loop over all formats
PCM *format;
float hzLeft = 440.0; // A440 (Concert A)
float hzRight = 440.0;
for (format = formats; format->numChannels; ++format) {
printf("Channels: %d, sample rate: %u, bits: %u\n", format->numChannels,
format->milliHz / 1000, format->bitsPerSample);
// configure audio source
SLDataLocator_BufferQueue loc_bufq;
loc_bufq.locatorType = SL_DATALOCATOR_BUFFERQUEUE;
loc_bufq.numBuffers = 1;
SLDataFormat_PCM format_pcm;
format_pcm.formatType = SL_DATAFORMAT_PCM;
format_pcm.numChannels = format->numChannels;
format_pcm.samplesPerSec = format->milliHz;
format_pcm.bitsPerSample = format->bitsPerSample;
format_pcm.containerSize = format->bitsPerSample;
format_pcm.channelMask = 0;
format_pcm.endianness = SL_BYTEORDER_LITTLEENDIAN;
SLDataSource audioSrc;
audioSrc.pLocator = &loc_bufq;
audioSrc.pFormat = &format_pcm;
// configure audio sink
SLDataLocator_OutputMix loc_outmix;
loc_outmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
loc_outmix.outputMix = outputMixObject;
SLDataSink audioSnk;
audioSnk.pLocator = &loc_outmix;
audioSnk.pFormat = NULL;
// create audio player
SLuint32 numInterfaces = 1;
SLInterfaceID ids[1];
SLboolean req[1];
ids[0] = SL_IID_BUFFERQUEUE;
req[0] = SL_BOOLEAN_TRUE;
SLObjectItf playerObject;
result = (*engineEngine)->CreateAudioPlayer(engineEngine, &playerObject, &audioSrc,
&audioSnk, numInterfaces, ids, req);
if (SL_RESULT_SUCCESS != result) {
printf("failed %u\n", result);
continue;
}
// realize the player
result = (*playerObject)->Realize(playerObject, SL_BOOLEAN_FALSE);
assert(SL_RESULT_SUCCESS == result);
// generate a sine wave buffer, ascending in half-steps for each format
#define N (44100*4)
static unsigned char buffer[N];
unsigned i;
for (i = 0; i < N; ) {
float seconds = (((i * 8) / (format->bitsPerSample * format->numChannels)) * 1000.0) /
format->milliHz;
short sampleLeft = sin(seconds * M_PI_2 * hzLeft) * 32767.0;
short sampleRight = sin(seconds * M_PI_2 * hzRight) * 32767.0;
if (2 == format->numChannels) {
if (8 == format->bitsPerSample) {
buffer[i++] = (sampleLeft + 32768) >> 8;
buffer[i++] = (sampleRight + 32768) >> 8;
} else {
assert(16 == format->bitsPerSample);
buffer[i++] = sampleLeft & 0xFF;
buffer[i++] = sampleLeft >> 8;
buffer[i++] = sampleRight & 0xFF;
buffer[i++] = sampleRight >> 8;
}
} else {
assert(1 == format->numChannels);
// cast to int and divide by 2 are needed to prevent overflow
short sampleMono = ((int) sampleLeft + (int) sampleRight) / 2;
if (8 == format->bitsPerSample) {
buffer[i++] = (sampleMono + 32768) >> 8;
} else {
assert(16 == format->bitsPerSample);
buffer[i++] = sampleMono & 0xFF;
buffer[i++] = sampleMono >> 8;
}
}
if (seconds >= 1.0f)
break;
}
// get the buffer queue interface and enqueue a buffer
SLBufferQueueItf playerBufferQueue;
result = (*playerObject)->GetInterface(playerObject, SL_IID_BUFFERQUEUE,
&playerBufferQueue);
assert(SL_RESULT_SUCCESS == result);
result = (*playerBufferQueue)->Enqueue(playerBufferQueue, buffer, i);
assert(SL_RESULT_SUCCESS == result);
// get the play interface
SLPlayItf playerPlay;
result = (*playerObject)->GetInterface(playerObject, SL_IID_PLAY, &playerPlay);
assert(SL_RESULT_SUCCESS == result);
// set the player's state to playing
result = (*playerPlay)->SetPlayState(playerPlay, SL_PLAYSTATE_PLAYING);
assert(SL_RESULT_SUCCESS == result);
// wait for the buffer to be played
for (;;) {
SLBufferQueueState state;
result = (*playerBufferQueue)->GetState(playerBufferQueue, &state);
assert(SL_RESULT_SUCCESS == result);
if (state.count == 0)
break;
usleep(20000);
}
// destroy audio player
(*playerObject)->Destroy(playerObject);
//usleep(1000000);
hzLeft *= 1.05946309; // twelfth root of 2
hzRight /= 1.05946309;
}
// destroy output mix
(*outputMixObject)->Destroy(outputMixObject);
// destroy engine
(*engineObject)->Destroy(engineObject);
return EXIT_SUCCESS;
}