1 /*---------------------------------------------------------------------------* 2 * audioinwrapper.cpp * 3 * * 4 * Copyright 2007, 2008 Nuance Communciations, Inc. * 5 * * 6 * Licensed under the Apache License, Version 2.0 (the 'License'); * 7 * you may not use this file except in compliance with the License. * 8 * * 9 * You may obtain a copy of the License at * 10 * http://www.apache.org/licenses/LICENSE-2.0 * 11 * * 12 * Unless required by applicable law or agreed to in writing, software * 13 * distributed under the License is distributed on an 'AS IS' BASIS, * 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * 15 * See the License for the specific language governing permissions and * 16 * limitations under the License. * 17 * * 18 *---------------------------------------------------------------------------*/ 19 20 21 #if defined(ANDROID) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_4__)) 22 23 //#define USE_DEV_EAC_FILE 1 24 25 #if defined(USE_DEV_EAC_FILE) 26 #include <fcntl.h> 27 #define N_CHANNELS 1 28 #else 29 #include <system/audio.h> 30 #include <media/AudioRecord.h> 31 #include <media/mediarecorder.h> 32 using namespace android; 33 #endif 34 35 #endif // defined(ANDROID) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_4__)) 36 37 #include "plog.h" 38 39 // #define SAVE_RAW_AUDIO 1 40 41 #ifdef SAVE_RAW_AUDIO 42 #include <sys/time.h> 43 #include <stdio.h> 44 45 46 static FILE *audio_data; 47 static struct timeval buffer_save_audio; 48 #endif 49 50 51 extern "C" 52 { 53 54 #if defined(ANDROID) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_4__)) 55 56 #if defined(USE_DEV_EAC_FILE) 57 static int audiofd = -1; 58 #else 59 static AudioRecord* record; 60 static int sampleRate = 8000; 61 static int numChannels = 1; 62 #endif 63 64 // called before AudioOpen 65 int AudioSetInputFormat(int sample_rate, int channel_count) 66 { 67 #if defined(USE_DEV_EAC_FILE) 68 return 0; 69 #else 70 sampleRate = sample_rate; 71 numChannels = channel_count; 72 return 0; 73 #endif 74 } 75 76 int AudioOpen(void) 77 { 78 #if defined(USE_DEV_EAC_FILE) 79 audiofd = open("/dev/eac", O_RDONLY, 0666); 80 if (audiofd >= 0) { 81 //fcntl(audiofd, F_SETFL, O_NONBLOCK); 82 83 // possibly lame attempt to get Sooner audio input working 84 struct { unsigned long param1, param2, param3; } params = { 11025, 0, 0 }; 85 ioctl(audiofd, 317, ¶ms, sizeof(params)); 86 } 87 88 return audiofd; 89 #else 90 #ifdef SAVE_RAW_AUDIO 91 char file_name [256]; 92 93 gettimeofday ( &buffer_save_audio, NULL ); 94 sprintf ( file_name, "data_%ld_%ld.raw", buffer_save_audio.tv_sec, buffer_save_audio.tv_usec ); 95 audio_data = fopen ( file_name, "w" ); 96 #endif 97 // TODO: get record buffer size from hardware. 98 record = new android::AudioRecord( 99 AUDIO_SOURCE_DEFAULT, 100 sampleRate, 101 AUDIO_FORMAT_PCM_16_BIT, 102 (numChannels > 1) ? AUDIO_CHANNEL_IN_STEREO : AUDIO_CHANNEL_IN_MONO, 103 8*1024, 104 (android::AudioRecord::record_flags) 0); 105 106 if (!record) return -1; 107 108 return record->start() == NO_ERROR ? 0 : -1; 109 #endif 110 } 111 112 int AudioClose(void) 113 { 114 #if defined(USE_DEV_EAC_FILE) 115 return close(audiofd); 116 #else 117 record->stop(); 118 delete record; 119 #ifdef SAVE_RAW_AUDIO 120 fclose ( audio_data ); 121 #endif 122 return 0; 123 #endif 124 } 125 126 int AudioRead(short *buffer, int frame_count) 127 { 128 int n; 129 #if defined(USE_DEV_EAC_FILE) 130 n = read(audiofd, buffer, frame_count*sizeof(short)*N_CHANNELS); 131 n /= sizeof(short)*N_CHANNELS; 132 return n; 133 #else 134 int nreq = frame_count * sizeof(short); 135 n = record->read(buffer, nreq); 136 if (n > 0) { 137 if (n != nreq) { 138 PLogError ( "AudioRead error: not enough data %d vs %d\n", n, nreq ); 139 } 140 n /= sizeof(short); 141 } 142 #ifdef SAVE_RAW_AUDIO 143 if ( n > 0 ) 144 fwrite ( buffer, 2, n, audio_data ); 145 #endif 146 return n; 147 #endif 148 } 149 150 int AudioSetVolume(int stream_type, int volume) 151 { 152 #if defined(USE_DEV_EAC_FILE) 153 return 0; 154 #else 155 return AudioSystem::setStreamVolume(stream_type, volume, 0); 156 #endif 157 } 158 159 int AudioGetVolume(int stream_type) 160 { 161 #if defined(USE_DEV_EAC_FILE) 162 return 0; 163 #else 164 float v = 0; 165 AudioSystem::getStreamVolume(stream_type, &v, 0); 166 return int(v * 100.0f); 167 #endif 168 } 169 170 #else 171 172 int AudioOpen(void) 173 { 174 return -1; 175 } 176 177 int AudioClose(void) 178 { 179 return -1; 180 } 181 182 int AudioSetInputFormat(int sample_rate, int channel_count) 183 { 184 return -1; 185 } 186 187 int AudioSetOutputFormat(int sample_rate, int channel_count) 188 { 189 return -1; 190 } 191 192 int AudioRead(short *buffer, int frame_count) 193 { 194 return -1; 195 } 196 197 int AudioWrite(short *buffer, int frame_count) 198 { 199 return -1; 200 } 201 202 int AudioSetStreamType(int stream_type) 203 { 204 return -1; 205 } 206 207 int AudioSetVolume(int stream_type, int volume) 208 { 209 return -1; 210 } 211 212 int AudioGetVolume(int stream_type) 213 { 214 return -1; 215 } 216 217 #endif 218 219 } // extern "C" 220
