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        //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
64void 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
80void 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
111status_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