tg2sip/libtgvoip/webrtc_dsp/common_audio/real_fourier.h

76 lines
2.8 KiB
C
Raw Normal View History

Squashed 'libtgvoip/' changes from 6053cf5..cfd62e6 cfd62e6 Why did it change the OS X project 3a58a16 2.4.3 c4a48b3 Updated OS X project 564eada Fix #63 4f64e2e fixes 0c732e2 fixes 12e76ed better logging f015b79 Merge pull request #62 from xvitaly/big-endian a1df90f Set preferred audio session parameters on iOS 59a975b Fixes 8fd89fc Fixes, mic level testing and volume adjustment 243acfa Backported WebRTC upstream patch with Big Endian support. fed3bb7 Detect when proxy does not support UDP and persist that across calls a7546d4 Merge commit '6d03dd9ae4bf48d7344341cdd2d055ebd3a6a42e' into public 6d03dd9 version 69adf70 Use server config for APM + iOS crash fix 0b42ec8 Update iOS project f1b9e63 packet logging beeea45 I apparently still suck at C++ memory management 24fceba Update project 7f54b91 crash fix f85ce99 Save more data in data saving mode f4c4f79 Collect packet stats and accept json string for server config 78e584c New protocol version: optimized packet size 8cf9177 Fixed build on iOS 9dd089d fixed build on android 5caaaaf Updated WebRTC APM cc0cf35 fixed deadlock 02f4835 Rearranged VoIPController methods and added sections 912f73d Updated OS X project 39376df Fixed audio glitches on Windows dfe1f03 Updated project 81daf3f fix 296187a Merge pull request #58 from telegramdesktop/tdesktop 44956ac Merge pull request #57 from UnigramDev/public fb0a2b0 Fix build for Linux. d6cf1b7 Updated UWP wrapper 0f06289 Merge branch 'public' of github.com:grishka/libtgvoip into public dcfad91 Fix #54 162f447 Merge pull request #56 from telegramdesktop/tdesktop a7ee511 Merge remote-tracking branch 'origin/tdesktop' into HEAD 467b148 Removed unused files b1a0b3d 2.3 9b292fd Fix warning in Xcode 10. 8d8522a Merge pull request #53 from UnigramDev/public 646f7d6 Merge branch 'public' into public 14d782b Fixes 68acf59 Added GetSignalBarsCount and GetConnectionState to CXWrapper 761c586 Added GetStats to CXWrapper f643b02 Prevent crash if UWP WASAPI devices aren't found b2ac10e Fixed UWP project 9a1ec51 Fixed build for Windows Phone, fixed some warnings 4aea54f fix git-subtree-dir: libtgvoip git-subtree-split: cfd62e66a825348ac51f49e5d20bf8827fef7a38
2019-02-06 18:22:38 +00:00
/*
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef COMMON_AUDIO_REAL_FOURIER_H_
#define COMMON_AUDIO_REAL_FOURIER_H_
#include <stddef.h>
#include <complex>
#include <memory>
#include "rtc_base/memory/aligned_malloc.h"
// Uniform interface class for the real DFT and its inverse, for power-of-2
// input lengths. Also contains helper functions for buffer allocation, taking
// care of any memory alignment requirements the underlying library might have.
namespace webrtc {
class RealFourier {
public:
// Shorthand typenames for the scopers used by the buffer allocation helpers.
typedef std::unique_ptr<float[], AlignedFreeDeleter> fft_real_scoper;
typedef std::unique_ptr<std::complex<float>[], AlignedFreeDeleter>
fft_cplx_scoper;
// The alignment required for all input and output buffers, in bytes.
static const size_t kFftBufferAlignment;
// Construct a wrapper instance for the given input order, which must be
// between 1 and kMaxFftOrder, inclusively.
static std::unique_ptr<RealFourier> Create(int fft_order);
virtual ~RealFourier() {}
// Helper to compute the smallest FFT order (a power of 2) which will contain
// the given input length.
static int FftOrder(size_t length);
// Helper to compute the input length from the FFT order.
static size_t FftLength(int order);
// Helper to compute the exact length, in complex floats, of the transform
// output (i.e. |2^order / 2 + 1|).
static size_t ComplexLength(int order);
// Buffer allocation helpers. The buffers are large enough to hold |count|
// floats/complexes and suitably aligned for use by the implementation.
// The returned scopers are set up with proper deleters; the caller owns
// the allocated memory.
static fft_real_scoper AllocRealBuffer(int count);
static fft_cplx_scoper AllocCplxBuffer(int count);
// Main forward transform interface. The output array need only be big
// enough for |2^order / 2 + 1| elements - the conjugate pairs are not
// returned. Input and output must be properly aligned (e.g. through
// AllocRealBuffer and AllocCplxBuffer) and input length must be
// |2^order| (same as given at construction time).
virtual void Forward(const float* src, std::complex<float>* dest) const = 0;
// Inverse transform. Same input format as output above, conjugate pairs
// not needed.
virtual void Inverse(const std::complex<float>* src, float* dest) const = 0;
virtual int order() const = 0;
};
} // namespace webrtc
#endif // COMMON_AUDIO_REAL_FOURIER_H_