1// Copyright 2008, The Android Open Source Project 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15// 16#define LOG_NDEBUG 0 17#define LOG_TAG "shared_mem_test" 18 19#include <stdlib.h> 20#include <stdio.h> 21#include <cutils/properties.h> 22#include <media/AudioSystem.h> 23#include <media/AudioTrack.h> 24#include <math.h> 25 26#include "shared_mem_test.h" 27#include <binder/MemoryDealer.h> 28#include <binder/MemoryHeapBase.h> 29#include <binder/MemoryBase.h> 30#include <binder/ProcessState.h> 31 32 33#include <utils/Log.h> 34 35#include <fcntl.h> 36 37namespace android { 38 39/************************************************************ 40* 41* Constructor 42* 43************************************************************/ 44AudioTrackTest::AudioTrackTest(void) { 45 46 InitSine(); // init sine table 47 48} 49 50 51/************************************************************ 52* 53* 54************************************************************/ 55void AudioTrackTest::Execute(void) { 56 if (Test01() == 0) { 57 ALOGD("01 passed\n"); 58 } else { 59 ALOGD("01 failed\n"); 60 } 61} 62 63/************************************************************ 64* 65* Shared memory test 66* 67************************************************************/ 68#define BUF_SZ 44100 69 70int AudioTrackTest::Test01() { 71 72 sp<MemoryDealer> heap; 73 sp<IMemory> iMem; 74 uint8_t* p; 75 76 short smpBuf[BUF_SZ]; 77 long rate = 44100; 78 unsigned long phi; 79 unsigned long dPhi; 80 long amplitude; 81 long freq = 1237; 82 float f0; 83 84 f0 = pow(2., 32.) * freq / (float)rate; 85 dPhi = (unsigned long)f0; 86 amplitude = 1000; 87 phi = 0; 88 Generate(smpBuf, BUF_SZ, amplitude, phi, dPhi); // fill buffer 89 90 for (int i = 0; i < 1024; i++) { 91 heap = new MemoryDealer(1024*1024, "AudioTrack Heap Base"); 92 93 iMem = heap->allocate(BUF_SZ*sizeof(short)); 94 95 p = static_cast<uint8_t*>(iMem->pointer()); 96 memcpy(p, smpBuf, BUF_SZ*sizeof(short)); 97 98 sp<AudioTrack> track = new AudioTrack(AUDIO_STREAM_MUSIC,// stream type 99 rate, 100 AUDIO_FORMAT_PCM_16_BIT,// word length, PCM 101 AUDIO_CHANNEL_OUT_MONO, 102 iMem); 103 104 status_t status = track->initCheck(); 105 if(status != NO_ERROR) { 106 track.clear(); 107 ALOGD("Failed for initCheck()"); 108 return -1; 109 } 110 111 // start play 112 ALOGD("start"); 113 track->start(); 114 115 usleep(20000); 116 117 ALOGD("stop"); 118 track->stop(); 119 iMem.clear(); 120 heap.clear(); 121 usleep(20000); 122 } 123 124 return 0; 125 126} 127 128/************************************************************ 129* 130* Generate a mono buffer 131* Error is less than 3lsb 132* 133************************************************************/ 134void AudioTrackTest::Generate(short *buffer, long bufferSz, long amplitude, unsigned long &phi, long dPhi) 135{ 136 long pi13 = 25736; // 2^13*pi 137 // fill buffer 138 for(int i0=0; i0<bufferSz; i0++) { 139 long sample; 140 long l0, l1; 141 142 buffer[i0] = ComputeSine( amplitude, phi); 143 phi += dPhi; 144 } 145} 146 147/************************************************************ 148* 149* Generate a sine 150* Error is less than 3lsb 151* 152************************************************************/ 153short AudioTrackTest::ComputeSine(long amplitude, long phi) 154{ 155 long pi13 = 25736; // 2^13*pi 156 long sample; 157 long l0, l1; 158 159 sample = (amplitude*sin1024[(phi>>22) & 0x3ff]) >> 15; 160 // correct with interpolation 161 l0 = (phi>>12) & 0x3ff; // 2^20 * x / (2*pi) 162 l1 = (amplitude*sin1024[((phi>>22) + 256) & 0x3ff]) >> 15; // 2^15*cosine 163 l0 = (l0 * l1) >> 10; 164 l0 = (l0 * pi13) >> 22; 165 sample = sample + l0; 166 167 return (short)sample; 168} 169 170 171/************************************************************ 172* 173* init sine table 174* 175************************************************************/ 176void AudioTrackTest::InitSine(void) { 177 double phi = 0; 178 double dPhi = 2 * M_PI / SIN_SZ; 179 for(int i0 = 0; i0<SIN_SZ; i0++) { 180 long d0; 181 182 d0 = 32768. * sin(phi); 183 phi += dPhi; 184 if(d0 >= 32767) d0 = 32767; 185 if(d0 <= -32768) d0 = -32768; 186 sin1024[i0] = (short)d0; 187 } 188} 189 190/************************************************************ 191* 192* main in name space 193* 194************************************************************/ 195int main() { 196 ProcessState::self()->startThreadPool(); 197 AudioTrackTest *test; 198 199 test = new AudioTrackTest(); 200 test->Execute(); 201 delete test; 202 203 return 0; 204} 205 206} 207 208/************************************************************ 209* 210* global main 211* 212************************************************************/ 213int main(int argc, char *argv[]) { 214 215 return android::main(); 216} 217