mirror of https://github.com/axmolengine/axmol.git
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
#ifndef CORE_BFORMATDEC_H
|
|
#define CORE_BFORMATDEC_H
|
|
|
|
#include <array>
|
|
#include <cstddef>
|
|
#include <memory>
|
|
|
|
#include "almalloc.h"
|
|
#include "alspan.h"
|
|
#include "ambidefs.h"
|
|
#include "bufferline.h"
|
|
#include "devformat.h"
|
|
#include "filters/splitter.h"
|
|
#include "vector.h"
|
|
|
|
struct FrontStablizer;
|
|
|
|
|
|
using ChannelDec = std::array<float,MaxAmbiChannels>;
|
|
|
|
class BFormatDec {
|
|
static constexpr size_t sHFBand{0};
|
|
static constexpr size_t sLFBand{1};
|
|
static constexpr size_t sNumBands{2};
|
|
|
|
struct ChannelDecoder {
|
|
union MatrixU {
|
|
float Dual[sNumBands][MAX_OUTPUT_CHANNELS];
|
|
float Single[MAX_OUTPUT_CHANNELS];
|
|
} mGains{};
|
|
|
|
/* NOTE: BandSplitter filter is unused with single-band decoding. */
|
|
BandSplitter mXOver;
|
|
};
|
|
|
|
alignas(16) std::array<FloatBufferLine,2> mSamples;
|
|
|
|
const std::unique_ptr<FrontStablizer> mStablizer;
|
|
const bool mDualBand{false};
|
|
|
|
/* TODO: This should ideally be a FlexArray, since ChannelDecoder is rather
|
|
* small and only a few are needed (3, 4, 5, 7, typically). But that can
|
|
* only be used in a standard layout struct, and a std::unique_ptr member
|
|
* (mStablizer) causes GCC and Clang to warn it's not.
|
|
*/
|
|
al::vector<ChannelDecoder> mChannelDec;
|
|
|
|
public:
|
|
BFormatDec(const size_t inchans, const al::span<const ChannelDec> coeffs,
|
|
const al::span<const ChannelDec> coeffslf, const float xover_f0norm,
|
|
std::unique_ptr<FrontStablizer> stablizer);
|
|
|
|
bool hasStablizer() const noexcept { return mStablizer != nullptr; }
|
|
|
|
/* Decodes the ambisonic input to the given output channels. */
|
|
void process(const al::span<FloatBufferLine> OutBuffer, const FloatBufferLine *InSamples,
|
|
const size_t SamplesToDo);
|
|
|
|
/* Decodes the ambisonic input to the given output channels with stablization. */
|
|
void processStablize(const al::span<FloatBufferLine> OutBuffer,
|
|
const FloatBufferLine *InSamples, const size_t lidx, const size_t ridx, const size_t cidx,
|
|
const size_t SamplesToDo);
|
|
|
|
static std::unique_ptr<BFormatDec> Create(const size_t inchans,
|
|
const al::span<const ChannelDec> coeffs, const al::span<const ChannelDec> coeffslf,
|
|
const float xover_f0norm, std::unique_ptr<FrontStablizer> stablizer);
|
|
|
|
DEF_NEWDEL(BFormatDec)
|
|
};
|
|
|
|
#endif /* CORE_BFORMATDEC_H */
|