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92 lines
2.3 KiB
92 lines
2.3 KiB
/* aKode: aKodeScope
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Copyright (C) 2005 Allan Sandfeld Jensen <kde@carewolf.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <akode/audioframe.h>
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#include <akode/converter.h>
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#include "akode-scope.h"
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#include <vector>
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//#include <iostream>
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using aKode::AudioFrame;
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// Copies fromFrame to toFrame fast (Actually a swap happens to save malloc and frees).
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static inline void takeover(AudioFrame* toFrame, AudioFrame* fromFrame)
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{
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AudioFrame tmpFrame;
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tmpFrame = *toFrame;
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*toFrame = *fromFrame;
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*fromFrame = tmpFrame;
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tmpFrame.data = 0;
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}
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struct aKodeScope::private_data
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{
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private_data() : length(512), convert(16) {};
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int length;
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aKode::AudioFrame frame;
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aKode::AudioFrame frame1;
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aKode::Converter convert;
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std::vector<int16_t> scope;
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};
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aKodeScope::aKodeScope()
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{
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d = new private_data;
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}
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aKodeScope::~aKodeScope()
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{
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delete d;
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}
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void aKodeScope::writeFrame(AudioFrame* frame)
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{
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takeover(&d->frame, frame);
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}
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/*
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void aKodeScope::setLength(length)
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{
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d->length = length;
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}
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int aKodeScope::length() const
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{
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return d->length;
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}*/
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const Engine::Scope& aKodeScope::scope()
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{
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d->convert.doFrame(&d->frame, &d->frame1);
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int length = d->frame1.length;
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int channels = d->frame1.channels;
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if (length > 512) length = 512;
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d->scope.resize(length*channels);
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int16_t **data = (int16_t**)d->frame1.data;
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for(int j=0 ; j < length; j++)
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for (int i = 0; i < channels; i++)
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d->scope[j*channels + i] = data[i][j];
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return d->scope;
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}
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