Mercurial > hg > svcore
view data/fft/FFTFileCacheWriter.cpp @ 1008:d9e0e59a1581
When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)
author | Chris Cannam |
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date | Fri, 14 Nov 2014 13:51:33 +0000 |
parents | 59e7fe1b1003 |
children | cc27f35aa75c |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006-2009 Chris Cannam and QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "FFTFileCacheWriter.h" #include "fileio/MatrixFile.h" #include "base/Profiler.h" #include "base/Thread.h" #include "base/Exceptions.h" #include <iostream> //#define DEBUG_FFT_FILE_CACHE_WRITER 1 // The underlying matrix has height (m_height * 2 + 1). In each // column we store magnitude at [0], [2] etc and phase at [1], [3] // etc, and then store the normalization factor (maximum magnitude) at // [m_height * 2]. In compact mode, the factor takes two cells. FFTFileCacheWriter::FFTFileCacheWriter(QString fileBase, FFTCache::StorageType storageType, int width, int height) : m_writebuf(0), m_fileBase(fileBase), m_storageType(storageType), m_factorSize(storageType == FFTCache::Compact ? 2 : 1), m_mfc(new MatrixFile (fileBase, MatrixFile::WriteOnly, storageType == FFTCache::Compact ? sizeof(uint16_t) : sizeof(float), width, height * 2 + m_factorSize)) { #ifdef DEBUG_FFT_FILE_CACHE_WRITER cerr << "FFTFileCacheWriter: storage type is " << (storageType == FFTCache::Compact ? "Compact" : storageType == FFTCache::Polar ? "Polar" : "Rectangular") << ", size " << width << "x" << height << endl; #endif m_mfc->setAutoClose(true); m_writebuf = new char[(height * 2 + m_factorSize) * m_mfc->getCellSize()]; } FFTFileCacheWriter::~FFTFileCacheWriter() { if (m_writebuf) delete[] m_writebuf; delete m_mfc; } QString FFTFileCacheWriter::getFileBase() const { return m_fileBase; } int FFTFileCacheWriter::getWidth() const { return m_mfc->getWidth(); } int FFTFileCacheWriter::getHeight() const { int mh = m_mfc->getHeight(); if (mh > m_factorSize) return (mh - m_factorSize) / 2; else return 0; } bool FFTFileCacheWriter::haveSetColumnAt(int x) const { return m_mfc->haveSetColumnAt(x); } void FFTFileCacheWriter::setColumnAt(int x, float *mags, float *phases, float factor) { int h = getHeight(); switch (m_storageType) { case FFTCache::Compact: for (int y = 0; y < h; ++y) { ((uint16_t *)m_writebuf)[y * 2] = uint16_t((mags[y] / factor) * 65535.0); ((uint16_t *)m_writebuf)[y * 2 + 1] = uint16_t(int16_t((phases[y] * 32767) / M_PI)); } break; case FFTCache::Rectangular: for (int y = 0; y < h; ++y) { ((float *)m_writebuf)[y * 2] = mags[y] * cosf(phases[y]); ((float *)m_writebuf)[y * 2 + 1] = mags[y] * sinf(phases[y]); } break; case FFTCache::Polar: for (int y = 0; y < h; ++y) { ((float *)m_writebuf)[y * 2] = mags[y]; ((float *)m_writebuf)[y * 2 + 1] = phases[y]; } break; } static float maxFactor = 0; if (factor > maxFactor) maxFactor = factor; #ifdef DEBUG_FFT_FILE_CACHE_WRITER cerr << "Column " << x << ": normalization factor: " << factor << ", max " << maxFactor << " (height " << getHeight() << ")" << endl; #endif setNormalizationFactorToWritebuf(factor); m_mfc->setColumnAt(x, m_writebuf); } void FFTFileCacheWriter::setColumnAt(int x, float *real, float *imag) { int h = getHeight(); float factor = 0.0f; switch (m_storageType) { case FFTCache::Compact: for (int y = 0; y < h; ++y) { float mag = sqrtf(real[y] * real[y] + imag[y] * imag[y]); if (mag > factor) factor = mag; } for (int y = 0; y < h; ++y) { float mag = sqrtf(real[y] * real[y] + imag[y] * imag[y]); float phase = atan2f(imag[y], real[y]); ((uint16_t *)m_writebuf)[y * 2] = uint16_t((mag / factor) * 65535.0); ((uint16_t *)m_writebuf)[y * 2 + 1] = uint16_t(int16_t((phase * 32767) / M_PI)); } break; case FFTCache::Rectangular: for (int y = 0; y < h; ++y) { ((float *)m_writebuf)[y * 2] = real[y]; ((float *)m_writebuf)[y * 2 + 1] = imag[y]; float mag = sqrtf(real[y] * real[y] + imag[y] * imag[y]); if (mag > factor) factor = mag; } break; case FFTCache::Polar: for (int y = 0; y < h; ++y) { float mag = sqrtf(real[y] * real[y] + imag[y] * imag[y]); if (mag > factor) factor = mag; ((float *)m_writebuf)[y * 2] = mag; float phase = atan2f(imag[y], real[y]); ((float *)m_writebuf)[y * 2 + 1] = phase; } break; } static float maxFactor = 0; if (factor > maxFactor) maxFactor = factor; #ifdef DEBUG_FFT_FILE_CACHE_WRITER cerr << "[RI] Column " << x << ": normalization factor: " << factor << ", max " << maxFactor << " (height " << getHeight() << ")" << endl; #endif setNormalizationFactorToWritebuf(factor); m_mfc->setColumnAt(x, m_writebuf); } int FFTFileCacheWriter::getCacheSize(int width, int height, FFTCache::StorageType type) { return (height * 2 + (type == FFTCache::Compact ? 2 : 1)) * width * (type == FFTCache::Compact ? sizeof(uint16_t) : sizeof(float)) + 2 * sizeof(int); // matrix file header size } void FFTFileCacheWriter::allColumnsWritten() { #ifdef DEBUG_FFT_FILE_CACHE_WRITER SVDEBUG << "FFTFileCacheWriter::allColumnsWritten" << endl; #endif m_mfc->close(); }