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// Copyright 2008, 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.
//
#define LOG_NDEBUG 0
#define LOG_TAG "shared_mem_test"
#include <stdlib.h>
#include <stdio.h>
#include <cutils/properties.h>
#include <media/AudioSystem.h>
#include <media/AudioTrack.h>
#include <math.h>
#include "shared_mem_test.h"
#include <binder/MemoryDealer.h>
#include <binder/MemoryHeapBase.h>
#include <binder/MemoryBase.h>
#include <binder/ProcessState.h>
#include <utils/Log.h>
#include <fcntl.h>
namespace android {
/************************************************************
*
* Constructor
*
************************************************************/
AudioTrackTest::AudioTrackTest(void) {
InitSine(); // init sine table
}
/************************************************************
*
*
************************************************************/
void AudioTrackTest::Execute(void) {
if (Test01() == 0) {
ALOGD("01 passed\n");
} else {
ALOGD("01 failed\n");
}
}
/************************************************************
*
* Shared memory test
*
************************************************************/
#define BUF_SZ 44100
int AudioTrackTest::Test01() {
sp<MemoryDealer> heap;
sp<IMemory> iMem;
uint8_t* p;
short smpBuf[BUF_SZ];
long rate = 44100;
unsigned long phi;
unsigned long dPhi;
long amplitude;
long freq = 1237;
float f0;
f0 = pow(2., 32.) * freq / (float)rate;
dPhi = (unsigned long)f0;
amplitude = 1000;
phi = 0;
Generate(smpBuf, BUF_SZ, amplitude, phi, dPhi); // fill buffer
for (int i = 0; i < 1024; i++) {
heap = new MemoryDealer(1024*1024, "AudioTrack Heap Base");
iMem = heap->allocate(BUF_SZ*sizeof(short));
p = static_cast<uint8_t*>(iMem->pointer());
memcpy(p, smpBuf, BUF_SZ*sizeof(short));
sp<AudioTrack> track = new AudioTrack(AUDIO_STREAM_MUSIC,// stream type
rate,
AUDIO_FORMAT_PCM_16_BIT,// word length, PCM
AUDIO_CHANNEL_OUT_MONO,
iMem);
status_t status = track->initCheck();
if(status != NO_ERROR) {
track.clear();
ALOGD("Failed for initCheck()");
return -1;
}
// start play
ALOGD("start");
track->start();
usleep(20000);
ALOGD("stop");
track->stop();
iMem.clear();
heap.clear();
usleep(20000);
}
return 0;
}
/************************************************************
*
* Generate a mono buffer
* Error is less than 3lsb
*
************************************************************/
void AudioTrackTest::Generate(short *buffer, long bufferSz, long amplitude, unsigned long &phi, long dPhi)
{
long pi13 = 25736; // 2^13*pi
// fill buffer
for(int i0=0; i0<bufferSz; i0++) {
long sample;
long l0, l1;
buffer[i0] = ComputeSine( amplitude, phi);
phi += dPhi;
}
}
/************************************************************
*
* Generate a sine
* Error is less than 3lsb
*
************************************************************/
short AudioTrackTest::ComputeSine(long amplitude, long phi)
{
long pi13 = 25736; // 2^13*pi
long sample;
long l0, l1;
sample = (amplitude*sin1024[(phi>>22) & 0x3ff]) >> 15;
// correct with interpolation
l0 = (phi>>12) & 0x3ff; // 2^20 * x / (2*pi)
l1 = (amplitude*sin1024[((phi>>22) + 256) & 0x3ff]) >> 15; // 2^15*cosine
l0 = (l0 * l1) >> 10;
l0 = (l0 * pi13) >> 22;
sample = sample + l0;
return (short)sample;
}
/************************************************************
*
* init sine table
*
************************************************************/
void AudioTrackTest::InitSine(void) {
double phi = 0;
double dPhi = 2 * M_PI / SIN_SZ;
for(int i0 = 0; i0<SIN_SZ; i0++) {
long d0;
d0 = 32768. * sin(phi);
phi += dPhi;
if(d0 >= 32767) d0 = 32767;
if(d0 <= -32768) d0 = -32768;
sin1024[i0] = (short)d0;
}
}
/************************************************************
*
* main in name space
*
************************************************************/
int main() {
ProcessState::self()->startThreadPool();
AudioTrackTest *test;
test = new AudioTrackTest();
test->Execute();
delete test;
return 0;
}
}
/************************************************************
*
* global main
*
************************************************************/
int main(int argc, char *argv[]) {
return android::main();
}
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