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
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
~AudioParameter()67 AudioParameter::~AudioParameter()
68 {
69 mParameters.clear();
70 }
71
toString()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
add(const String8 & key,const String8 & value)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
addInt(const String8 & key,const int value)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
addFloat(const String8 & key,const float value)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
remove(const String8 & key)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
get(const String8 & key,String8 & value)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
getInt(const String8 & key,int & value)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
getFloat(const String8 & key,float & value)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
getAt(size_t index,String8 & key,String8 & value)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