mirror of
https://github.com/smallmain/cocos-enhance-kit.git
synced 2025-10-31 16:15:23 +00:00
451 lines
15 KiB
C++
451 lines
15 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "audio/android/cutils/log.h"
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namespace cocos2d {
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/* Behavior of is_same<>::value is true if the types are identical,
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* false otherwise. Identical to the STL std::is_same.
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*/
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template<typename T, typename U>
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struct is_same
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{
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static const bool value = false;
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};
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template<typename T>
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struct is_same<T, T> // partial specialization
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{
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static const bool value = true;
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};
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/* MixMul is a multiplication operator to scale an audio input signal
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* by a volume gain, with the formula:
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*
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* O(utput) = I(nput) * V(olume)
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*
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* The output, input, and volume may have different types.
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* There are 27 variants, of which 14 are actually defined in an
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* explicitly templated class.
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*
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* The following type variables and the underlying meaning:
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*
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* Output type TO: int32_t (Q4.27) or int16_t (Q.15) or float [-1,1]
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* Input signal type TI: int32_t (Q4.27) or int16_t (Q.15) or float [-1,1]
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* Volume type TV: int32_t (U4.28) or int16_t (U4.12) or float [-1,1]
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*
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* For high precision audio, only the <TO, TI, TV> = <float, float, float>
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* needs to be accelerated. This is perhaps the easiest form to do quickly as well.
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*
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* A generic version is NOT defined to catch any mistake of using it.
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*/
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template <typename TO, typename TI, typename TV>
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TO MixMul(TI value, TV volume);
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template <>
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inline int32_t MixMul<int32_t, int16_t, int16_t>(int16_t value, int16_t volume) {
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return value * volume;
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}
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template <>
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inline int32_t MixMul<int32_t, int32_t, int16_t>(int32_t value, int16_t volume) {
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return (value >> 12) * volume;
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}
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template <>
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inline int32_t MixMul<int32_t, int16_t, int32_t>(int16_t value, int32_t volume) {
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return value * (volume >> 16);
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}
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template <>
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inline int32_t MixMul<int32_t, int32_t, int32_t>(int32_t value, int32_t volume) {
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return (value >> 12) * (volume >> 16);
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}
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template <>
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inline float MixMul<float, float, int16_t>(float value, int16_t volume) {
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static const float norm = 1. / (1 << 12);
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return value * volume * norm;
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}
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template <>
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inline float MixMul<float, float, int32_t>(float value, int32_t volume) {
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static const float norm = 1. / (1 << 28);
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return value * volume * norm;
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}
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template <>
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inline int16_t MixMul<int16_t, float, int16_t>(float value, int16_t volume) {
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return clamp16_from_float(MixMul<float, float, int16_t>(value, volume));
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}
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template <>
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inline int16_t MixMul<int16_t, float, int32_t>(float value, int32_t volume) {
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return clamp16_from_float(MixMul<float, float, int32_t>(value, volume));
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}
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template <>
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inline float MixMul<float, int16_t, int16_t>(int16_t value, int16_t volume) {
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static const float norm = 1. / (1 << (15 + 12));
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return static_cast<float>(value) * static_cast<float>(volume) * norm;
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}
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template <>
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inline float MixMul<float, int16_t, int32_t>(int16_t value, int32_t volume) {
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static const float norm = 1. / (1ULL << (15 + 28));
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return static_cast<float>(value) * static_cast<float>(volume) * norm;
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}
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template <>
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inline int16_t MixMul<int16_t, int16_t, int16_t>(int16_t value, int16_t volume) {
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return clamp16(MixMul<int32_t, int16_t, int16_t>(value, volume) >> 12);
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}
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template <>
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inline int16_t MixMul<int16_t, int32_t, int16_t>(int32_t value, int16_t volume) {
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return clamp16(MixMul<int32_t, int32_t, int16_t>(value, volume) >> 12);
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}
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template <>
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inline int16_t MixMul<int16_t, int16_t, int32_t>(int16_t value, int32_t volume) {
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return clamp16(MixMul<int32_t, int16_t, int32_t>(value, volume) >> 12);
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}
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template <>
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inline int16_t MixMul<int16_t, int32_t, int32_t>(int32_t value, int32_t volume) {
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return clamp16(MixMul<int32_t, int32_t, int32_t>(value, volume) >> 12);
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}
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/* Required for floating point volume. Some are needed for compilation but
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* are not needed in execution and should be removed from the final build by
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* an optimizing compiler.
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*/
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template <>
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inline float MixMul<float, float, float>(float value, float volume) {
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return value * volume;
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}
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template <>
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inline float MixMul<float, int16_t, float>(int16_t value, float volume) {
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static const float float_from_q_15 = 1. / (1 << 15);
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return value * volume * float_from_q_15;
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}
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template <>
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inline int32_t MixMul<int32_t, int32_t, float>(int32_t value, float volume) {
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LOG_ALWAYS_FATAL("MixMul<int32_t, int32_t, float> Runtime Should not be here");
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return value * volume;
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}
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template <>
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inline int32_t MixMul<int32_t, int16_t, float>(int16_t value, float volume) {
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LOG_ALWAYS_FATAL("MixMul<int32_t, int16_t, float> Runtime Should not be here");
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static const float u4_12_from_float = (1 << 12);
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return value * volume * u4_12_from_float;
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}
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template <>
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inline int16_t MixMul<int16_t, int16_t, float>(int16_t value, float volume) {
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LOG_ALWAYS_FATAL("MixMul<int16_t, int16_t, float> Runtime Should not be here");
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return clamp16_from_float(MixMul<float, int16_t, float>(value, volume));
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}
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template <>
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inline int16_t MixMul<int16_t, float, float>(float value, float volume) {
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return clamp16_from_float(value * volume);
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}
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/*
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* MixAccum is used to add into an accumulator register of a possibly different
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* type. The TO and TI types are the same as MixMul.
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*/
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template <typename TO, typename TI>
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inline void MixAccum(TO *auxaccum, TI value) {
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if (!is_same<TO, TI>::value) {
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LOG_ALWAYS_FATAL("MixAccum type not properly specialized: %zu %zu\n",
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sizeof(TO), sizeof(TI));
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}
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*auxaccum += value;
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}
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template<>
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inline void MixAccum<float, int16_t>(float *auxaccum, int16_t value) {
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static const float norm = 1. / (1 << 15);
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*auxaccum += norm * value;
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}
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template<>
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inline void MixAccum<float, int32_t>(float *auxaccum, int32_t value) {
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static const float norm = 1. / (1 << 27);
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*auxaccum += norm * value;
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}
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template<>
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inline void MixAccum<int32_t, int16_t>(int32_t *auxaccum, int16_t value) {
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*auxaccum += value << 12;
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}
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template<>
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inline void MixAccum<int32_t, float>(int32_t *auxaccum, float value) {
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*auxaccum += clampq4_27_from_float(value);
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}
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/* MixMulAux is just like MixMul except it combines with
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* an accumulator operation MixAccum.
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*/
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template <typename TO, typename TI, typename TV, typename TA>
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inline TO MixMulAux(TI value, TV volume, TA *auxaccum) {
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MixAccum<TA, TI>(auxaccum, value);
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return MixMul<TO, TI, TV>(value, volume);
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}
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/* MIXTYPE is used to determine how the samples in the input frame
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* are mixed with volume gain into the output frame.
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* See the volumeRampMulti functions below for more details.
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*/
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enum {
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MIXTYPE_MULTI,
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MIXTYPE_MONOEXPAND,
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MIXTYPE_MULTI_SAVEONLY,
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MIXTYPE_MULTI_MONOVOL,
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MIXTYPE_MULTI_SAVEONLY_MONOVOL,
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};
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/*
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* The volumeRampMulti and volumeRamp functions take a MIXTYPE
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* which indicates the per-frame mixing and accumulation strategy.
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*
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* MIXTYPE_MULTI:
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* NCHAN represents number of input and output channels.
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* TO: int32_t (Q4.27) or float
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* TI: int32_t (Q4.27) or int16_t (Q0.15) or float
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* TV: int32_t (U4.28) or int16_t (U4.12) or float
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* vol: represents a volume array.
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*
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* This accumulates into the out pointer.
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*
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* MIXTYPE_MONOEXPAND:
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* Single input channel. NCHAN represents number of output channels.
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* TO: int32_t (Q4.27) or float
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* TI: int32_t (Q4.27) or int16_t (Q0.15) or float
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* TV: int32_t (U4.28) or int16_t (U4.12) or float
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* Input channel count is 1.
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* vol: represents volume array.
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*
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* This accumulates into the out pointer.
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*
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* MIXTYPE_MULTI_SAVEONLY:
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* NCHAN represents number of input and output channels.
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* TO: int16_t (Q.15) or float
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* TI: int32_t (Q4.27) or int16_t (Q0.15) or float
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* TV: int32_t (U4.28) or int16_t (U4.12) or float
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* vol: represents a volume array.
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*
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* MIXTYPE_MULTI_SAVEONLY does not accumulate into the out pointer.
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*
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* MIXTYPE_MULTI_MONOVOL:
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* Same as MIXTYPE_MULTI, but uses only volume[0].
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*
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* MIXTYPE_MULTI_SAVEONLY_MONOVOL:
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* Same as MIXTYPE_MULTI_SAVEONLY, but uses only volume[0].
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*
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*/
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template <int MIXTYPE, int NCHAN,
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typename TO, typename TI, typename TV, typename TA, typename TAV>
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inline void volumeRampMulti(TO* out, size_t frameCount,
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const TI* in, TA* aux, TV *vol, const TV *volinc, TAV *vola, TAV volainc)
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{
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#ifdef ALOGVV
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ALOGVV("volumeRampMulti, MIXTYPE:%d\n", MIXTYPE);
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#endif
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if (aux != NULL) {
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do {
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TA auxaccum = 0;
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switch (MIXTYPE) {
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case MIXTYPE_MULTI:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMulAux<TO, TI, TV, TA>(*in++, vol[i], &auxaccum);
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vol[i] += volinc[i];
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}
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break;
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case MIXTYPE_MONOEXPAND:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMulAux<TO, TI, TV, TA>(*in, vol[i], &auxaccum);
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vol[i] += volinc[i];
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}
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in++;
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break;
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case MIXTYPE_MULTI_SAVEONLY:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMulAux<TO, TI, TV, TA>(*in++, vol[i], &auxaccum);
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vol[i] += volinc[i];
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}
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break;
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case MIXTYPE_MULTI_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMulAux<TO, TI, TV, TA>(*in++, vol[0], &auxaccum);
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}
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vol[0] += volinc[0];
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break;
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case MIXTYPE_MULTI_SAVEONLY_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMulAux<TO, TI, TV, TA>(*in++, vol[0], &auxaccum);
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}
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vol[0] += volinc[0];
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break;
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default:
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LOG_ALWAYS_FATAL("invalid mixtype %d", MIXTYPE);
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break;
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}
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auxaccum /= NCHAN;
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*aux++ += MixMul<TA, TA, TAV>(auxaccum, *vola);
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vola[0] += volainc;
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} while (--frameCount);
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} else {
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do {
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switch (MIXTYPE) {
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case MIXTYPE_MULTI:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMul<TO, TI, TV>(*in++, vol[i]);
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vol[i] += volinc[i];
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}
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break;
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case MIXTYPE_MONOEXPAND:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMul<TO, TI, TV>(*in, vol[i]);
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vol[i] += volinc[i];
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}
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in++;
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break;
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case MIXTYPE_MULTI_SAVEONLY:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMul<TO, TI, TV>(*in++, vol[i]);
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vol[i] += volinc[i];
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}
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break;
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case MIXTYPE_MULTI_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMul<TO, TI, TV>(*in++, vol[0]);
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}
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vol[0] += volinc[0];
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break;
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case MIXTYPE_MULTI_SAVEONLY_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMul<TO, TI, TV>(*in++, vol[0]);
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}
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vol[0] += volinc[0];
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break;
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default:
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LOG_ALWAYS_FATAL("invalid mixtype %d", MIXTYPE);
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break;
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}
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} while (--frameCount);
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}
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}
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template <int MIXTYPE, int NCHAN,
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typename TO, typename TI, typename TV, typename TA, typename TAV>
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inline void volumeMulti(TO* out, size_t frameCount,
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const TI* in, TA* aux, const TV *vol, TAV vola)
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{
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#ifdef ALOGVV
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ALOGVV("volumeMulti MIXTYPE:%d\n", MIXTYPE);
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#endif
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if (aux != NULL) {
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do {
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TA auxaccum = 0;
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switch (MIXTYPE) {
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case MIXTYPE_MULTI:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMulAux<TO, TI, TV, TA>(*in++, vol[i], &auxaccum);
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}
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break;
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case MIXTYPE_MONOEXPAND:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMulAux<TO, TI, TV, TA>(*in, vol[i], &auxaccum);
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}
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in++;
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break;
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case MIXTYPE_MULTI_SAVEONLY:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMulAux<TO, TI, TV, TA>(*in++, vol[i], &auxaccum);
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}
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break;
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case MIXTYPE_MULTI_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMulAux<TO, TI, TV, TA>(*in++, vol[0], &auxaccum);
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}
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break;
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case MIXTYPE_MULTI_SAVEONLY_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMulAux<TO, TI, TV, TA>(*in++, vol[0], &auxaccum);
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}
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break;
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default:
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LOG_ALWAYS_FATAL("invalid mixtype %d", MIXTYPE);
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break;
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}
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auxaccum /= NCHAN;
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*aux++ += MixMul<TA, TA, TAV>(auxaccum, vola);
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} while (--frameCount);
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} else {
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do {
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switch (MIXTYPE) {
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case MIXTYPE_MULTI:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMul<TO, TI, TV>(*in++, vol[i]);
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}
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break;
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case MIXTYPE_MONOEXPAND:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMul<TO, TI, TV>(*in, vol[i]);
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}
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in++;
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break;
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case MIXTYPE_MULTI_SAVEONLY:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMul<TO, TI, TV>(*in++, vol[i]);
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}
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break;
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case MIXTYPE_MULTI_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ += MixMul<TO, TI, TV>(*in++, vol[0]);
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}
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break;
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case MIXTYPE_MULTI_SAVEONLY_MONOVOL:
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for (int i = 0; i < NCHAN; ++i) {
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*out++ = MixMul<TO, TI, TV>(*in++, vol[0]);
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}
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break;
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default:
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LOG_ALWAYS_FATAL("invalid mixtype %d", MIXTYPE);
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break;
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}
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} while (--frameCount);
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}
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}
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} // namespace cocos2d {
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