diff options
author | Joerg Mueller <nexyon@gmail.com> | 2009-08-10 01:16:39 +0400 |
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committer | Joerg Mueller <nexyon@gmail.com> | 2009-08-10 01:16:39 +0400 |
commit | 6c5c58e05799f2b593cd81fcff57e6ef72ad57fb (patch) | |
tree | 8add929ef94d03fc69aecce6ef2baf283505782f /intern/audaspace/SRC/AUD_SRCResampleReader.h | |
parent | c1ca2ab5dceb8d5355215a3c7a80b171f394e487 (diff) |
2.5: Sound branch merge!
See mailing list for additional information.
Diffstat (limited to 'intern/audaspace/SRC/AUD_SRCResampleReader.h')
-rw-r--r-- | intern/audaspace/SRC/AUD_SRCResampleReader.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/intern/audaspace/SRC/AUD_SRCResampleReader.h b/intern/audaspace/SRC/AUD_SRCResampleReader.h new file mode 100644 index 00000000000..1bacdb3965c --- /dev/null +++ b/intern/audaspace/SRC/AUD_SRCResampleReader.h @@ -0,0 +1,102 @@ +/* + * $Id$ + * + * ***** BEGIN LGPL LICENSE BLOCK ***** + * + * Copyright 2009 Jörg Hermann Müller + * + * This file is part of AudaSpace. + * + * AudaSpace is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * AudaSpace 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with AudaSpace. If not, see <http://www.gnu.org/licenses/>. + * + * ***** END LGPL LICENSE BLOCK ***** + */ + +#ifndef AUD_SRCRESAMPLEREADER +#define AUD_SRCRESAMPLEREADER + +#include "AUD_EffectReader.h" +class AUD_Buffer; + +#include <samplerate.h> + +/** + * This class mixes a sound source with help of the SDL library. + * Unfortunately SDL is only capable of 8 and 16 bit audio, mono and stereo, as + * well as resampling only 2^n sample rate relationships where n is a natural + * number. + * \warning Although SDL can only resample 2^n sample rate relationships, this + * class doesn't check for compliance, so in case of other factors, + * the behaviour is undefined. + */ +class AUD_SRCResampleReader : public AUD_EffectReader +{ +private: + /** + * The resampling factor. + */ + double m_factor; + + /** + * The sound output buffer. + */ + AUD_Buffer *m_buffer; + + /** + * The target specification. + */ + AUD_Specs m_tspecs; + + /** + * The sample specification of the source. + */ + AUD_Specs m_sspecs; + + /** + * The src state structure. + */ + SRC_STATE* m_src; + +public: + /** + * Creates a resampling reader. + * \param reader The reader to mix. + * \param specs The target specification. + * \exception AUD_Exception Thrown if the source specification cannot be + * mixed to the target specification or if the reader is + * NULL. + */ + AUD_SRCResampleReader(AUD_IReader* reader, AUD_Specs specs); + + /** + * Destroys the reader. + */ + ~AUD_SRCResampleReader(); + + /** + * The callback function for SRC. + * \warning Do not call! + * \param data The pointer to the float data. + * \return The count of samples in the float data. + */ + long doCallback(float** data); + + virtual void seek(int position); + virtual int getLength(); + virtual int getPosition(); + virtual AUD_Specs getSpecs(); + virtual void read(int & length, sample_t* & buffer); +}; + +#endif //AUD_SRCRESAMPLEREADER |