1 /*
2 * Copyright (C) 2015 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 "APM::VolumeCurve"
18 //#define LOG_NDEBUG 0
19
20 #include "VolumeCurve.h"
21 #include "TypeConverter.h"
22
23 namespace android {
24
volIndexToDb(int indexInUi,int volIndexMin,int volIndexMax) const25 float VolumeCurve::volIndexToDb(int indexInUi, int volIndexMin, int volIndexMax) const
26 {
27 ALOG_ASSERT(!mCurvePoints.isEmpty(), "Invalid volume curve");
28
29 size_t nbCurvePoints = mCurvePoints.size();
30 // the volume index in the UI is relative to the min and max volume indices for this stream
31 int nbSteps = 1 + mCurvePoints[nbCurvePoints - 1].mIndex - mCurvePoints[0].mIndex;
32 int volIdx = (nbSteps * (indexInUi - volIndexMin)) / (volIndexMax - volIndexMin);
33
34 // Where would this volume index been inserted in the curve point
35 size_t indexInUiPosition = mCurvePoints.orderOf(CurvePoint(volIdx, 0));
36 if (indexInUiPosition >= nbCurvePoints) {
37 return 0.0f; // out of bounds
38 }
39 if (indexInUiPosition == 0) {
40 if (indexInUiPosition != mCurvePoints[0].mIndex) {
41 return VOLUME_MIN_DB; // out of bounds
42 }
43 return mCurvePoints[0].mAttenuationInMb / 100.0f;
44 }
45 // linear interpolation in the attenuation table in dB
46 float decibels = (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f) +
47 ((float)(volIdx - mCurvePoints[indexInUiPosition - 1].mIndex)) *
48 ( ((mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f) -
49 (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f)) /
50 ((float)(mCurvePoints[indexInUiPosition].mIndex -
51 mCurvePoints[indexInUiPosition - 1].mIndex)) );
52
53 ALOGV("VOLUME mDeviceCategory %d, mStreamType %d vol index=[%d %d %d], dB=[%.1f %.1f %.1f]",
54 mDeviceCategory, mStreamType,
55 mCurvePoints[indexInUiPosition - 1].mIndex, volIdx,
56 mCurvePoints[indexInUiPosition].mIndex,
57 ((float)mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f), decibels,
58 ((float)mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f));
59
60 return decibels;
61 }
62
dump(int fd) const63 void VolumeCurve::dump(int fd) const
64 {
65 const size_t SIZE = 256;
66 char buffer[SIZE];
67 String8 result;
68 snprintf(buffer, SIZE, " {");
69 result.append(buffer);
70 for (size_t i = 0; i < mCurvePoints.size(); i++) {
71 snprintf(buffer, SIZE, "(%3d, %5d)",
72 mCurvePoints[i].mIndex, mCurvePoints[i].mAttenuationInMb);
73 result.append(buffer);
74 result.append(i == (mCurvePoints.size() - 1) ? " }\n" : ", ");
75 }
76 write(fd, result.string(), result.size());
77 }
78
dump(int fd,int spaces=0,bool curvePoints) const79 void VolumeCurvesForStream::dump(int fd, int spaces = 0, bool curvePoints) const
80 {
81 const size_t SIZE = 256;
82 char buffer[SIZE];
83 String8 result;
84
85 if (!curvePoints) {
86 snprintf(buffer, SIZE, "%s %02d %02d ",
87 mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
88 result.append(buffer);
89 for (size_t i = 0; i < mIndexCur.size(); i++) {
90 snprintf(buffer, SIZE, "%04x : %02d, ", mIndexCur.keyAt(i), mIndexCur.valueAt(i));
91 result.append(buffer);
92 }
93 result.append("\n");
94 write(fd, result.string(), result.size());
95 return;
96 }
97
98 for (size_t i = 0; i < size(); i++) {
99 std::string deviceCatLiteral;
100 DeviceCategoryConverter::toString(keyAt(i), deviceCatLiteral);
101 snprintf(buffer, SIZE, "%*s %s :",
102 spaces, "", deviceCatLiteral.c_str());
103 write(fd, buffer, strlen(buffer));
104 valueAt(i)->dump(fd);
105 }
106 result.append("\n");
107 write(fd, result.string(), result.size());
108 }
109
dump(int fd) const110 status_t VolumeCurvesCollection::dump(int fd) const
111 {
112 const size_t SIZE = 256;
113 char buffer[SIZE];
114
115 snprintf(buffer, SIZE, "\nStreams dump:\n");
116 write(fd, buffer, strlen(buffer));
117 snprintf(buffer, SIZE,
118 " Stream Can be muted Index Min Index Max Index Cur [device : index]...\n");
119 write(fd, buffer, strlen(buffer));
120 for (size_t i = 0; i < size(); i++) {
121 snprintf(buffer, SIZE, " %02zu ", i);
122 write(fd, buffer, strlen(buffer));
123 valueAt(i).dump(fd);
124 }
125 snprintf(buffer, SIZE, "\nVolume Curves for Use Cases (aka Stream types) dump:\n");
126 write(fd, buffer, strlen(buffer));
127 for (size_t i = 0; i < size(); i++) {
128 std::string streamTypeLiteral;
129 StreamTypeConverter::toString(keyAt(i), streamTypeLiteral);
130 snprintf(buffer, SIZE,
131 " %s (%02zu): Curve points for device category (index, attenuation in millibel)\n",
132 streamTypeLiteral.c_str(), i);
133 write(fd, buffer, strlen(buffer));
134 valueAt(i).dump(fd, 2, true);
135 }
136
137 return NO_ERROR;
138 }
139
140 }; // namespace android
141