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    if (indexInUi < volIndexMin) {
33        ALOGV("VOLUME remapping index from %d to min index %d", indexInUi, volIndexMin);
34        indexInUi = volIndexMin;
35    } else if (indexInUi > volIndexMax) {
36        ALOGV("VOLUME remapping index from %d to max index %d", indexInUi, volIndexMax);
37        indexInUi = volIndexMax;
38    }
39    int volIdx = (nbSteps * (indexInUi - volIndexMin)) / (volIndexMax - volIndexMin);
40
41    // Where would this volume index been inserted in the curve point
42    size_t indexInUiPosition = mCurvePoints.orderOf(CurvePoint(volIdx, 0));
43    if (indexInUiPosition >= nbCurvePoints) {
44        //use last point of table
45        return mCurvePoints[nbCurvePoints - 1].mAttenuationInMb / 100.0f;
46    }
47    if (indexInUiPosition == 0) {
48        if (indexInUiPosition != mCurvePoints[0].mIndex) {
49            return VOLUME_MIN_DB; // out of bounds
50        }
51        return mCurvePoints[0].mAttenuationInMb / 100.0f;
52    }
53    // linear interpolation in the attenuation table in dB
54    float decibels = (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f) +
55            ((float)(volIdx - mCurvePoints[indexInUiPosition - 1].mIndex)) *
56                ( ((mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f) -
57                        (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f)) /
58                    ((float)(mCurvePoints[indexInUiPosition].mIndex -
59                            mCurvePoints[indexInUiPosition - 1].mIndex)) );
60
61    ALOGV("VOLUME mDeviceCategory %d, mStreamType %d vol index=[%d %d %d], dB=[%.1f %.1f %.1f]",
62            mDeviceCategory, mStreamType,
63            mCurvePoints[indexInUiPosition - 1].mIndex, volIdx,
64            mCurvePoints[indexInUiPosition].mIndex,
65            ((float)mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f), decibels,
66            ((float)mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f));
67
68    return decibels;
69}
70
71void VolumeCurve::dump(int fd) const
72{
73    const size_t SIZE = 256;
74    char buffer[SIZE];
75    String8 result;
76    snprintf(buffer, SIZE, " {");
77    result.append(buffer);
78    for (size_t i = 0; i < mCurvePoints.size(); i++) {
79        snprintf(buffer, SIZE, "(%3d, %5d)",
80                 mCurvePoints[i].mIndex, mCurvePoints[i].mAttenuationInMb);
81        result.append(buffer);
82        result.append(i == (mCurvePoints.size() - 1) ? " }\n" : ", ");
83    }
84    write(fd, result.string(), result.size());
85}
86
87void VolumeCurvesForStream::dump(int fd, int spaces = 0, bool curvePoints) const
88{
89    const size_t SIZE = 256;
90    char buffer[SIZE];
91    String8 result;
92
93    if (!curvePoints) {
94        snprintf(buffer, SIZE, "%s         %02d         %02d         ",
95                 mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
96        result.append(buffer);
97        for (size_t i = 0; i < mIndexCur.size(); i++) {
98            snprintf(buffer, SIZE, "%04x : %02d, ", mIndexCur.keyAt(i), mIndexCur.valueAt(i));
99            result.append(buffer);
100        }
101        result.append("\n");
102        write(fd, result.string(), result.size());
103        return;
104    }
105
106    for (size_t i = 0; i < size(); i++) {
107        std::string deviceCatLiteral;
108        DeviceCategoryConverter::toString(keyAt(i), deviceCatLiteral);
109        snprintf(buffer, SIZE, "%*s %s :",
110                 spaces, "", deviceCatLiteral.c_str());
111        write(fd, buffer, strlen(buffer));
112        valueAt(i)->dump(fd);
113    }
114    result.append("\n");
115    write(fd, result.string(), result.size());
116}
117
118status_t VolumeCurvesCollection::dump(int fd) const
119{
120    const size_t SIZE = 256;
121    char buffer[SIZE];
122
123    snprintf(buffer, SIZE, "\nStreams dump:\n");
124    write(fd, buffer, strlen(buffer));
125    snprintf(buffer, SIZE,
126             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
127    write(fd, buffer, strlen(buffer));
128    for (size_t i = 0; i < size(); i++) {
129        snprintf(buffer, SIZE, " %02zu      ", i);
130        write(fd, buffer, strlen(buffer));
131        valueAt(i).dump(fd);
132    }
133    snprintf(buffer, SIZE, "\nVolume Curves for Use Cases (aka Stream types) dump:\n");
134    write(fd, buffer, strlen(buffer));
135    for (size_t i = 0; i < size(); i++) {
136        std::string streamTypeLiteral;
137        StreamTypeConverter::toString(keyAt(i), streamTypeLiteral);
138        snprintf(buffer, SIZE,
139                 " %s (%02zu): Curve points for device category (index, attenuation in millibel)\n",
140                 streamTypeLiteral.c_str(), i);
141        write(fd, buffer, strlen(buffer));
142        valueAt(i).dump(fd, 2, true);
143    }
144
145    return NO_ERROR;
146}
147
148} // namespace android
149