| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "APM::VolumeCurve" |
| //#define LOG_NDEBUG 0 |
| |
| #include "VolumeCurve.h" |
| #include "TypeConverter.h" |
| |
| namespace android { |
| |
| float VolumeCurve::volIndexToDb(int indexInUi, int volIndexMin, int volIndexMax) const |
| { |
| ALOG_ASSERT(!mCurvePoints.isEmpty(), "Invalid volume curve"); |
| |
| size_t nbCurvePoints = mCurvePoints.size(); |
| // the volume index in the UI is relative to the min and max volume indices for this stream |
| int nbSteps = 1 + mCurvePoints[nbCurvePoints - 1].mIndex - mCurvePoints[0].mIndex; |
| if (indexInUi < volIndexMin) { |
| ALOGV("VOLUME remapping index from %d to min index %d", indexInUi, volIndexMin); |
| indexInUi = volIndexMin; |
| } else if (indexInUi > volIndexMax) { |
| ALOGV("VOLUME remapping index from %d to max index %d", indexInUi, volIndexMax); |
| indexInUi = volIndexMax; |
| } |
| int volIdx = (nbSteps * (indexInUi - volIndexMin)) / (volIndexMax - volIndexMin); |
| |
| // Where would this volume index been inserted in the curve point |
| size_t indexInUiPosition = mCurvePoints.orderOf(CurvePoint(volIdx, 0)); |
| if (indexInUiPosition >= nbCurvePoints) { |
| //use last point of table |
| return mCurvePoints[nbCurvePoints - 1].mAttenuationInMb / 100.0f; |
| } |
| if (indexInUiPosition == 0) { |
| if (indexInUiPosition != mCurvePoints[0].mIndex) { |
| return VOLUME_MIN_DB; // out of bounds |
| } |
| return mCurvePoints[0].mAttenuationInMb / 100.0f; |
| } |
| // linear interpolation in the attenuation table in dB |
| float decibels = (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f) + |
| ((float)(volIdx - mCurvePoints[indexInUiPosition - 1].mIndex)) * |
| ( ((mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f) - |
| (mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f)) / |
| ((float)(mCurvePoints[indexInUiPosition].mIndex - |
| mCurvePoints[indexInUiPosition - 1].mIndex)) ); |
| |
| ALOGV("VOLUME mDeviceCategory %d, mStreamType %d vol index=[%d %d %d], dB=[%.1f %.1f %.1f]", |
| mDeviceCategory, mStreamType, |
| mCurvePoints[indexInUiPosition - 1].mIndex, volIdx, |
| mCurvePoints[indexInUiPosition].mIndex, |
| ((float)mCurvePoints[indexInUiPosition - 1].mAttenuationInMb / 100.0f), decibels, |
| ((float)mCurvePoints[indexInUiPosition].mAttenuationInMb / 100.0f)); |
| |
| return decibels; |
| } |
| |
| void VolumeCurve::dump(int fd) const |
| { |
| const size_t SIZE = 256; |
| char buffer[SIZE]; |
| String8 result; |
| snprintf(buffer, SIZE, " {"); |
| result.append(buffer); |
| for (size_t i = 0; i < mCurvePoints.size(); i++) { |
| snprintf(buffer, SIZE, "(%3d, %5d)", |
| mCurvePoints[i].mIndex, mCurvePoints[i].mAttenuationInMb); |
| result.append(buffer); |
| result.append(i == (mCurvePoints.size() - 1) ? " }\n" : ", "); |
| } |
| write(fd, result.string(), result.size()); |
| } |
| |
| void VolumeCurvesForStream::dump(int fd, int spaces = 0, bool curvePoints) const |
| { |
| const size_t SIZE = 256; |
| char buffer[SIZE]; |
| String8 result; |
| |
| if (!curvePoints) { |
| snprintf(buffer, SIZE, "%s %02d %02d ", |
| mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax); |
| result.append(buffer); |
| for (size_t i = 0; i < mIndexCur.size(); i++) { |
| snprintf(buffer, SIZE, "%04x : %02d, ", mIndexCur.keyAt(i), mIndexCur.valueAt(i)); |
| result.append(buffer); |
| } |
| result.append("\n"); |
| write(fd, result.string(), result.size()); |
| return; |
| } |
| |
| for (size_t i = 0; i < size(); i++) { |
| std::string deviceCatLiteral; |
| DeviceCategoryConverter::toString(keyAt(i), deviceCatLiteral); |
| snprintf(buffer, SIZE, "%*s %s :", |
| spaces, "", deviceCatLiteral.c_str()); |
| write(fd, buffer, strlen(buffer)); |
| valueAt(i)->dump(fd); |
| } |
| result.append("\n"); |
| write(fd, result.string(), result.size()); |
| } |
| |
| status_t VolumeCurvesCollection::dump(int fd) const |
| { |
| const size_t SIZE = 256; |
| char buffer[SIZE]; |
| |
| snprintf(buffer, SIZE, "\nStreams dump:\n"); |
| write(fd, buffer, strlen(buffer)); |
| snprintf(buffer, SIZE, |
| " Stream Can be muted Index Min Index Max Index Cur [device : index]...\n"); |
| write(fd, buffer, strlen(buffer)); |
| for (size_t i = 0; i < size(); i++) { |
| snprintf(buffer, SIZE, " %02zu ", i); |
| write(fd, buffer, strlen(buffer)); |
| valueAt(i).dump(fd); |
| } |
| snprintf(buffer, SIZE, "\nVolume Curves for Use Cases (aka Stream types) dump:\n"); |
| write(fd, buffer, strlen(buffer)); |
| for (size_t i = 0; i < size(); i++) { |
| std::string streamTypeLiteral; |
| StreamTypeConverter::toString(keyAt(i), streamTypeLiteral); |
| snprintf(buffer, SIZE, |
| " %s (%02zu): Curve points for device category (index, attenuation in millibel)\n", |
| streamTypeLiteral.c_str(), i); |
| write(fd, buffer, strlen(buffer)); |
| valueAt(i).dump(fd, 2, true); |
| } |
| |
| return NO_ERROR; |
| } |
| |
| } // namespace android |