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 37 namespace android { 38 39 /************************************************************ 40 * 41 * Constructor 42 * 43 ************************************************************/ 44 AudioTrackTest::AudioTrackTest(void) { 45 46 InitSine(); // init sine table 47 48 } 49 50 51 /************************************************************ 52 * 53 * 54 ************************************************************/ 55 void 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 70 int 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 ************************************************************/ 134 void AudioTrackTest::Generate(short *buffer, long bufferSz, long amplitude, unsigned long &phi, long dPhi) 135 { 136 // fill buffer 137 for(int i0=0; i0<bufferSz; i0++) { 138 buffer[i0] = ComputeSine( amplitude, phi); 139 phi += dPhi; 140 } 141 } 142 143 /************************************************************ 144 * 145 * Generate a sine 146 * Error is less than 3lsb 147 * 148 ************************************************************/ 149 short AudioTrackTest::ComputeSine(long amplitude, long phi) 150 { 151 long pi13 = 25736; // 2^13*pi 152 long sample; 153 long l0, l1; 154 155 sample = (amplitude*sin1024[(phi>>22) & 0x3ff]) >> 15; 156 // correct with interpolation 157 l0 = (phi>>12) & 0x3ff; // 2^20 * x / (2*pi) 158 l1 = (amplitude*sin1024[((phi>>22) + 256) & 0x3ff]) >> 15; // 2^15*cosine 159 l0 = (l0 * l1) >> 10; 160 l0 = (l0 * pi13) >> 22; 161 sample = sample + l0; 162 163 return (short)sample; 164 } 165 166 167 /************************************************************ 168 * 169 * init sine table 170 * 171 ************************************************************/ 172 void AudioTrackTest::InitSine(void) { 173 double phi = 0; 174 double dPhi = 2 * M_PI / SIN_SZ; 175 for(int i0 = 0; i0<SIN_SZ; i0++) { 176 long d0; 177 178 d0 = 32768. * sin(phi); 179 phi += dPhi; 180 if(d0 >= 32767) d0 = 32767; 181 if(d0 <= -32768) d0 = -32768; 182 sin1024[i0] = (short)d0; 183 } 184 } 185 186 /************************************************************ 187 * 188 * main in name space 189 * 190 ************************************************************/ 191 int main() { 192 ProcessState::self()->startThreadPool(); 193 AudioTrackTest *test; 194 195 test = new AudioTrackTest(); 196 test->Execute(); 197 delete test; 198 199 return 0; 200 } 201 202 } 203 204 /************************************************************ 205 * 206 * global main 207 * 208 ************************************************************/ 209 int main() { 210 211 return android::main(); 212 } 213
