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
23namespace android {
24
25float 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
63void 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
79void 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
110status_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