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 //use last point of table
38 return mCurvePoints[nbCurvePoints - 1].mAttenuationInMb / 100.0f;
39 }
40 if (indexInUiPosition == 0) {
41 if (indexInUiPosition != mCurvePoints[0].mIndex) {
42 return VOLUME_MIN_DB; // out of bounds
43 }
44 return mCurvePoints[0].mAttenuationInMb / 100.0f;
45 }
46 // linear interpolation in the attenuation table in dB
47 float decibels = (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f) +
48 ((float)(volIdx - mCurvePoints[indexInUiPosition - 1].mIndex)) *
49 ( ((mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f) -
50 (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f)) /
51 ((float)(mCurvePoints[indexInUiPosition].mIndex -
52 mCurvePoints[indexInUiPosition - 1].mIndex)) );
53
54 ALOGV("VOLUME mDeviceCategory %d, mStreamType %d vol index=[%d %d %d], dB=[%.1f %.1f %.1f]",
55 mDeviceCategory, mStreamType,
56 mCurvePoints[indexInUiPosition - 1].mIndex, volIdx,
57 mCurvePoints[indexInUiPosition].mIndex,
58 ((float)mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f), decibels,
59 ((float)mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f));
60
61 return decibels;
62 }
63
dump(int fd) const64 void VolumeCurve::dump(int fd) const
65 {
66 const size_t SIZE = 256;
67 char buffer[SIZE];
68 String8 result;
69 snprintf(buffer, SIZE, " {");
70 result.append(buffer);
71 for (size_t i = 0; i < mCurvePoints.size(); i++) {
72 snprintf(buffer, SIZE, "(%3d, %5d)",
73 mCurvePoints[i].mIndex, mCurvePoints[i].mAttenuationInMb);
74 result.append(buffer);
75 result.append(i == (mCurvePoints.size() - 1) ? " }\n" : ", ");
76 }
77 write(fd, result.string(), result.size());
78 }
79
dump(int fd,int spaces=0,bool curvePoints) const80 void VolumeCurvesForStream::dump(int fd, int spaces = 0, bool curvePoints) const
81 {
82 const size_t SIZE = 256;
83 char buffer[SIZE];
84 String8 result;
85
86 if (!curvePoints) {
87 snprintf(buffer, SIZE, "%s %02d %02d ",
88 mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
89 result.append(buffer);
90 for (size_t i = 0; i < mIndexCur.size(); i++) {
91 snprintf(buffer, SIZE, "%04x : %02d, ", mIndexCur.keyAt(i), mIndexCur.valueAt(i));
92 result.append(buffer);
93 }
94 result.append("\n");
95 write(fd, result.string(), result.size());
96 return;
97 }
98
99 for (size_t i = 0; i < size(); i++) {
100 std::string deviceCatLiteral;
101 DeviceCategoryConverter::toString(keyAt(i), deviceCatLiteral);
102 snprintf(buffer, SIZE, "%*s %s :",
103 spaces, "", deviceCatLiteral.c_str());
104 write(fd, buffer, strlen(buffer));
105 valueAt(i)->dump(fd);
106 }
107 result.append("\n");
108 write(fd, result.string(), result.size());
109 }
110
dump(int fd) const111 status_t VolumeCurvesCollection::dump(int fd) const
112 {
113 const size_t SIZE = 256;
114 char buffer[SIZE];
115
116 snprintf(buffer, SIZE, "\nStreams dump:\n");
117 write(fd, buffer, strlen(buffer));
118 snprintf(buffer, SIZE,
119 " Stream Can be muted Index Min Index Max Index Cur [device : index]...\n");
120 write(fd, buffer, strlen(buffer));
121 for (size_t i = 0; i < size(); i++) {
122 snprintf(buffer, SIZE, " %02zu ", i);
123 write(fd, buffer, strlen(buffer));
124 valueAt(i).dump(fd);
125 }
126 snprintf(buffer, SIZE, "\nVolume Curves for Use Cases (aka Stream types) dump:\n");
127 write(fd, buffer, strlen(buffer));
128 for (size_t i = 0; i < size(); i++) {
129 std::string streamTypeLiteral;
130 StreamTypeConverter::toString(keyAt(i), streamTypeLiteral);
131 snprintf(buffer, SIZE,
132 " %s (%02zu): Curve points for device category (index, attenuation in millibel)\n",
133 streamTypeLiteral.c_str(), i);
134 write(fd, buffer, strlen(buffer));
135 valueAt(i).dump(fd, 2, true);
136 }
137
138 return NO_ERROR;
139 }
140
141 }; // namespace android
142