1 /* 2 * Copyright (C) 2006-2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "AudioParameter" 18 //#define LOG_NDEBUG 0 19 20 #include <utils/Log.h> 21 22 #include <media/AudioParameter.h> 23 #include <system/audio.h> 24 25 namespace android { 26 27 // static 28 const char * const AudioParameter::keyRouting = AUDIO_PARAMETER_STREAM_ROUTING; 29 const char * const AudioParameter::keySamplingRate = AUDIO_PARAMETER_STREAM_SAMPLING_RATE; 30 const char * const AudioParameter::keyFormat = AUDIO_PARAMETER_STREAM_FORMAT; 31 const char * const AudioParameter::keyChannels = AUDIO_PARAMETER_STREAM_CHANNELS; 32 const char * const AudioParameter::keyFrameCount = AUDIO_PARAMETER_STREAM_FRAME_COUNT; 33 const char * const AudioParameter::keyInputSource = AUDIO_PARAMETER_STREAM_INPUT_SOURCE; 34 const char * const AudioParameter::keyScreenState = AUDIO_PARAMETER_KEY_SCREEN_STATE; 35 const char * const AudioParameter::keyBtNrec = AUDIO_PARAMETER_KEY_BT_NREC; 36 const char * const AudioParameter::keyHwAvSync = AUDIO_PARAMETER_HW_AV_SYNC; 37 const char * const AudioParameter::keyMonoOutput = AUDIO_PARAMETER_MONO_OUTPUT; 38 const char * const AudioParameter::keyStreamHwAvSync = AUDIO_PARAMETER_STREAM_HW_AV_SYNC; 39 const char * const AudioParameter::keyStreamConnect = AUDIO_PARAMETER_DEVICE_CONNECT; 40 const char * const AudioParameter::keyStreamDisconnect = AUDIO_PARAMETER_DEVICE_DISCONNECT; 41 const char * const AudioParameter::keyStreamSupportedFormats = AUDIO_PARAMETER_STREAM_SUP_FORMATS; 42 const char * const AudioParameter::keyStreamSupportedChannels = AUDIO_PARAMETER_STREAM_SUP_CHANNELS; 43 const char * const AudioParameter::keyStreamSupportedSamplingRates = 44 AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES; 45 const char * const AudioParameter::valueOn = AUDIO_PARAMETER_VALUE_ON; 46 const char * const AudioParameter::valueOff = AUDIO_PARAMETER_VALUE_OFF; 47 const char * const AudioParameter::valueListSeparator = AUDIO_PARAMETER_VALUE_LIST_SEPARATOR; 48 49 AudioParameter::AudioParameter(const String8& keyValuePairs) 50 { 51 char *str = new char[keyValuePairs.length()+1]; 52 mKeyValuePairs = keyValuePairs; 53 char *last; 54 55 strcpy(str, keyValuePairs.string()); 56 char *pair = strtok_r(str, ";", &last); 57 while (pair != NULL) { 58 if (strlen(pair) != 0) { 59 size_t eqIdx = strcspn(pair, "="); 60 String8 key = String8(pair, eqIdx); 61 String8 value; 62 if (eqIdx == strlen(pair)) { 63 value = String8(""); 64 } else { 65 value = String8(pair + eqIdx + 1); 66 } 67 if (mParameters.indexOfKey(key) < 0) { 68 mParameters.add(key, value); 69 } else { 70 mParameters.replaceValueFor(key, value); 71 } 72 } else { 73 ALOGV("AudioParameter() cstor empty key value pair"); 74 } 75 pair = strtok_r(NULL, ";", &last); 76 } 77 78 delete[] str; 79 } 80 81 AudioParameter::~AudioParameter() 82 { 83 mParameters.clear(); 84 } 85 86 String8 AudioParameter::toStringImpl(bool useValues) const 87 { 88 String8 str = String8(""); 89 90 size_t size = mParameters.size(); 91 for (size_t i = 0; i < size; i++) { 92 str += mParameters.keyAt(i); 93 if (useValues) { 94 str += "="; 95 str += mParameters.valueAt(i); 96 } 97 if (i < (size - 1)) str += ";"; 98 } 99 return str; 100 } 101 102 status_t AudioParameter::add(const String8& key, const String8& value) 103 { 104 if (mParameters.indexOfKey(key) < 0) { 105 mParameters.add(key, value); 106 return NO_ERROR; 107 } else { 108 mParameters.replaceValueFor(key, value); 109 return ALREADY_EXISTS; 110 } 111 } 112 113 status_t AudioParameter::addKey(const String8& key) 114 { 115 return add(key, String8()); 116 } 117 118 status_t AudioParameter::addInt(const String8& key, const int value) 119 { 120 char str[12]; 121 if (snprintf(str, 12, "%d", value) > 0) { 122 String8 str8 = String8(str); 123 return add(key, str8); 124 } else { 125 return BAD_VALUE; 126 } 127 } 128 129 status_t AudioParameter::addFloat(const String8& key, const float value) 130 { 131 char str[23]; 132 if (snprintf(str, 23, "%.10f", value) > 0) { 133 String8 str8 = String8(str); 134 return add(key, str8); 135 } else { 136 return BAD_VALUE; 137 } 138 } 139 140 status_t AudioParameter::remove(const String8& key) 141 { 142 if (mParameters.indexOfKey(key) >= 0) { 143 mParameters.removeItem(key); 144 return NO_ERROR; 145 } else { 146 return BAD_VALUE; 147 } 148 } 149 150 status_t AudioParameter::get(const String8& key, String8& value) const 151 { 152 if (mParameters.indexOfKey(key) >= 0) { 153 value = mParameters.valueFor(key); 154 return NO_ERROR; 155 } else { 156 return BAD_VALUE; 157 } 158 } 159 160 status_t AudioParameter::getInt(const String8& key, int& value) const 161 { 162 String8 str8; 163 status_t result = get(key, str8); 164 value = 0; 165 if (result == NO_ERROR) { 166 int val; 167 if (sscanf(str8.string(), "%d", &val) == 1) { 168 value = val; 169 } else { 170 result = INVALID_OPERATION; 171 } 172 } 173 return result; 174 } 175 176 status_t AudioParameter::getFloat(const String8& key, float& value) const 177 { 178 String8 str8; 179 status_t result = get(key, str8); 180 value = 0; 181 if (result == NO_ERROR) { 182 float val; 183 if (sscanf(str8.string(), "%f", &val) == 1) { 184 value = val; 185 } else { 186 result = INVALID_OPERATION; 187 } 188 } 189 return result; 190 } 191 192 status_t AudioParameter::getAt(size_t index, String8& key) const 193 { 194 if (mParameters.size() > index) { 195 key = mParameters.keyAt(index); 196 return NO_ERROR; 197 } else { 198 return BAD_VALUE; 199 } 200 } 201 202 status_t AudioParameter::getAt(size_t index, String8& key, String8& value) const 203 { 204 if (mParameters.size() > index) { 205 key = mParameters.keyAt(index); 206 value = mParameters.valueAt(index); 207 return NO_ERROR; 208 } else { 209 return BAD_VALUE; 210 } 211 } 212 213 } // namespace android 214
