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 <hardware/audio.h> 23 #include <media/AudioParameter.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 36 AudioParameter::AudioParameter(const String8& keyValuePairs) 37 { 38 char *str = new char[keyValuePairs.length()+1]; 39 mKeyValuePairs = keyValuePairs; 40 41 strcpy(str, keyValuePairs.string()); 42 char *pair = strtok(str, ";"); 43 while (pair != NULL) { 44 if (strlen(pair) != 0) { 45 size_t eqIdx = strcspn(pair, "="); 46 String8 key = String8(pair, eqIdx); 47 String8 value; 48 if (eqIdx == strlen(pair)) { 49 value = String8(""); 50 } else { 51 value = String8(pair + eqIdx + 1); 52 } 53 if (mParameters.indexOfKey(key) < 0) { 54 mParameters.add(key, value); 55 } else { 56 mParameters.replaceValueFor(key, value); 57 } 58 } else { 59 ALOGV("AudioParameter() cstor empty key value pair"); 60 } 61 pair = strtok(NULL, ";"); 62 } 63 64 delete[] str; 65 } 66 67 AudioParameter::~AudioParameter() 68 { 69 mParameters.clear(); 70 } 71 72 String8 AudioParameter::toString() 73 { 74 String8 str = String8(""); 75 76 size_t size = mParameters.size(); 77 for (size_t i = 0; i < size; i++) { 78 str += mParameters.keyAt(i); 79 str += "="; 80 str += mParameters.valueAt(i); 81 if (i < (size - 1)) str += ";"; 82 } 83 return str; 84 } 85 86 status_t AudioParameter::add(const String8& key, const String8& value) 87 { 88 if (mParameters.indexOfKey(key) < 0) { 89 mParameters.add(key, value); 90 return NO_ERROR; 91 } else { 92 mParameters.replaceValueFor(key, value); 93 return ALREADY_EXISTS; 94 } 95 } 96 97 status_t AudioParameter::addInt(const String8& key, const int value) 98 { 99 char str[12]; 100 if (snprintf(str, 12, "%d", value) > 0) { 101 String8 str8 = String8(str); 102 return add(key, str8); 103 } else { 104 return BAD_VALUE; 105 } 106 } 107 108 status_t AudioParameter::addFloat(const String8& key, const float value) 109 { 110 char str[23]; 111 if (snprintf(str, 23, "%.10f", value) > 0) { 112 String8 str8 = String8(str); 113 return add(key, str8); 114 } else { 115 return BAD_VALUE; 116 } 117 } 118 119 status_t AudioParameter::remove(const String8& key) 120 { 121 if (mParameters.indexOfKey(key) >= 0) { 122 mParameters.removeItem(key); 123 return NO_ERROR; 124 } else { 125 return BAD_VALUE; 126 } 127 } 128 129 status_t AudioParameter::get(const String8& key, String8& value) 130 { 131 if (mParameters.indexOfKey(key) >= 0) { 132 value = mParameters.valueFor(key); 133 return NO_ERROR; 134 } else { 135 return BAD_VALUE; 136 } 137 } 138 139 status_t AudioParameter::getInt(const String8& key, int& value) 140 { 141 String8 str8; 142 status_t result = get(key, str8); 143 value = 0; 144 if (result == NO_ERROR) { 145 int val; 146 if (sscanf(str8.string(), "%d", &val) == 1) { 147 value = val; 148 } else { 149 result = INVALID_OPERATION; 150 } 151 } 152 return result; 153 } 154 155 status_t AudioParameter::getFloat(const String8& key, float& value) 156 { 157 String8 str8; 158 status_t result = get(key, str8); 159 value = 0; 160 if (result == NO_ERROR) { 161 float val; 162 if (sscanf(str8.string(), "%f", &val) == 1) { 163 value = val; 164 } else { 165 result = INVALID_OPERATION; 166 } 167 } 168 return result; 169 } 170 171 status_t AudioParameter::getAt(size_t index, String8& key, String8& value) 172 { 173 if (mParameters.size() > index) { 174 key = mParameters.keyAt(index); 175 value = mParameters.valueAt(index); 176 return NO_ERROR; 177 } else { 178 return BAD_VALUE; 179 } 180 } 181 182 }; // namespace android 183
