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Diffstat (limited to 'akode/lib/fast_resampler.h')
-rw-r--r-- | akode/lib/fast_resampler.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/akode/lib/fast_resampler.h b/akode/lib/fast_resampler.h new file mode 100644 index 0000000..3c28f47 --- /dev/null +++ b/akode/lib/fast_resampler.h @@ -0,0 +1,60 @@ +/* aKode: Resampler (fast) + + Copyright (C) 2004 Allan Sandfeld Jensen <kde@carewolf.com> + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ +#ifndef _AKODE_FAST_RESAMPLER_H +#define _AKODE_FAST_RESAMPLER_H + +#include "resampler.h" + +namespace aKode { + +class AudioFrame; + +//! Fast low quality resampler using linear interpolation + +/*! + * This is the default resampler, which excels over the SRCResampler + * in being LGPL, fast and integer only, but the result is more + * noisy. + * + * The quality of resampling most relevant to low signal samples. + * For samples of 44100Hz/16bit or more, it is mostly irrelevant. + */ + +class FastResampler : public Resampler { +public: + FastResampler(); + bool doFrame(AudioFrame* in, AudioFrame* out); + void setSampleRate(unsigned int rate); + void setSpeed(float speed); + + float speed; + unsigned int sample_rate; +}; + +class FastResamplerPlugin : public ResamplerPlugin { +public: + virtual FastResampler* openResampler(); +}; + +extern "C" FastResamplerPlugin fast_resampler; + +} // namespace + +#endif |