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
AudioParameter(const String8 & keyValuePairs)36 AudioParameter::AudioParameter(const String8& keyValuePairs)
37 {
38 char *str = new char[keyValuePairs.length()+1];
39 mKeyValuePairs = keyValuePairs;
40 char *last;
41
42 strcpy(str, keyValuePairs.string());
43 char *pair = strtok_r(str, ";", &last);
44 while (pair != NULL) {
45 if (strlen(pair) != 0) {
46 size_t eqIdx = strcspn(pair, "=");
47 String8 key = String8(pair, eqIdx);
48 String8 value;
49 if (eqIdx == strlen(pair)) {
50 value = String8("");
51 } else {
52 value = String8(pair + eqIdx + 1);
53 }
54 if (mParameters.indexOfKey(key) < 0) {
55 mParameters.add(key, value);
56 } else {
57 mParameters.replaceValueFor(key, value);
58 }
59 } else {
60 ALOGV("AudioParameter() cstor empty key value pair");
61 }
62 pair = strtok_r(NULL, ";", &last);
63 }
64
65 delete[] str;
66 }
67
~AudioParameter()68 AudioParameter::~AudioParameter()
69 {
70 mParameters.clear();
71 }
72
toString()73 String8 AudioParameter::toString()
74 {
75 String8 str = String8("");
76
77 size_t size = mParameters.size();
78 for (size_t i = 0; i < size; i++) {
79 str += mParameters.keyAt(i);
80 str += "=";
81 str += mParameters.valueAt(i);
82 if (i < (size - 1)) str += ";";
83 }
84 return str;
85 }
86
add(const String8 & key,const String8 & value)87 status_t AudioParameter::add(const String8& key, const String8& value)
88 {
89 if (mParameters.indexOfKey(key) < 0) {
90 mParameters.add(key, value);
91 return NO_ERROR;
92 } else {
93 mParameters.replaceValueFor(key, value);
94 return ALREADY_EXISTS;
95 }
96 }
97
addInt(const String8 & key,const int value)98 status_t AudioParameter::addInt(const String8& key, const int value)
99 {
100 char str[12];
101 if (snprintf(str, 12, "%d", value) > 0) {
102 String8 str8 = String8(str);
103 return add(key, str8);
104 } else {
105 return BAD_VALUE;
106 }
107 }
108
addFloat(const String8 & key,const float value)109 status_t AudioParameter::addFloat(const String8& key, const float value)
110 {
111 char str[23];
112 if (snprintf(str, 23, "%.10f", value) > 0) {
113 String8 str8 = String8(str);
114 return add(key, str8);
115 } else {
116 return BAD_VALUE;
117 }
118 }
119
remove(const String8 & key)120 status_t AudioParameter::remove(const String8& key)
121 {
122 if (mParameters.indexOfKey(key) >= 0) {
123 mParameters.removeItem(key);
124 return NO_ERROR;
125 } else {
126 return BAD_VALUE;
127 }
128 }
129
get(const String8 & key,String8 & value)130 status_t AudioParameter::get(const String8& key, String8& value)
131 {
132 if (mParameters.indexOfKey(key) >= 0) {
133 value = mParameters.valueFor(key);
134 return NO_ERROR;
135 } else {
136 return BAD_VALUE;
137 }
138 }
139
getInt(const String8 & key,int & value)140 status_t AudioParameter::getInt(const String8& key, int& value)
141 {
142 String8 str8;
143 status_t result = get(key, str8);
144 value = 0;
145 if (result == NO_ERROR) {
146 int val;
147 if (sscanf(str8.string(), "%d", &val) == 1) {
148 value = val;
149 } else {
150 result = INVALID_OPERATION;
151 }
152 }
153 return result;
154 }
155
getFloat(const String8 & key,float & value)156 status_t AudioParameter::getFloat(const String8& key, float& value)
157 {
158 String8 str8;
159 status_t result = get(key, str8);
160 value = 0;
161 if (result == NO_ERROR) {
162 float val;
163 if (sscanf(str8.string(), "%f", &val) == 1) {
164 value = val;
165 } else {
166 result = INVALID_OPERATION;
167 }
168 }
169 return result;
170 }
171
getAt(size_t index,String8 & key,String8 & value)172 status_t AudioParameter::getAt(size_t index, String8& key, String8& value)
173 {
174 if (mParameters.size() > index) {
175 key = mParameters.keyAt(index);
176 value = mParameters.valueAt(index);
177 return NO_ERROR;
178 } else {
179 return BAD_VALUE;
180 }
181 }
182
183 } // namespace android
184