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); 104 105 if (!record) return -1; 106 107 return record->start() == NO_ERROR ? 0 : -1; 108 #endif 109 } 110 111 int AudioClose(void) 112 { 113 #if defined(USE_DEV_EAC_FILE) 114 return close(audiofd); 115 #else 116 record->stop(); 117 delete record; 118 #ifdef SAVE_RAW_AUDIO 119 fclose ( audio_data ); 120 #endif 121 return 0; 122 #endif 123 } 124 125 int AudioRead(short *buffer, int frame_count) 126 { 127 int n; 128 #if defined(USE_DEV_EAC_FILE) 129 n = read(audiofd, buffer, frame_count*sizeof(short)*N_CHANNELS); 130 n /= sizeof(short)*N_CHANNELS; 131 return n; 132 #else 133 int nreq = frame_count * sizeof(short); 134 n = record->read(buffer, nreq); 135 if (n > 0) { 136 if (n != nreq) { 137 PLogError ( "AudioRead error: not enough data %d vs %d\n", n, nreq ); 138 } 139 n /= sizeof(short); 140 } 141 #ifdef SAVE_RAW_AUDIO 142 if ( n > 0 ) 143 fwrite ( buffer, 2, n, audio_data ); 144 #endif 145 return n; 146 #endif 147 } 148 149 int AudioSetVolume(int stream_type, int volume) 150 { 151 #if defined(USE_DEV_EAC_FILE) 152 return 0; 153 #else 154 return AudioSystem::setStreamVolume(stream_type, volume, 0); 155 #endif 156 } 157 158 int AudioGetVolume(int stream_type) 159 { 160 #if defined(USE_DEV_EAC_FILE) 161 return 0; 162 #else 163 float v = 0; 164 AudioSystem::getStreamVolume(stream_type, &v, 0); 165 return int(v * 100.0f); 166 #endif 167 } 168 169 #else 170 171 int AudioOpen(void) 172 { 173 return -1; 174 } 175 176 int AudioClose(void) 177 { 178 return -1; 179 } 180 181 int AudioSetInputFormat(int sample_rate, int channel_count) 182 { 183 return -1; 184 } 185 186 int AudioSetOutputFormat(int sample_rate, int channel_count) 187 { 188 return -1; 189 } 190 191 int AudioRead(short *buffer, int frame_count) 192 { 193 return -1; 194 } 195 196 int AudioWrite(short *buffer, int frame_count) 197 { 198 return -1; 199 } 200 201 int AudioSetStreamType(int stream_type) 202 { 203 return -1; 204 } 205 206 int AudioSetVolume(int stream_type, int volume) 207 { 208 return -1; 209 } 210 211 int AudioGetVolume(int stream_type) 212 { 213 return -1; 214 } 215 216 #endif 217 218 } // extern "C" 219
