root/libmedia/AudioResampler.h

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// AudioResampler.h -- custom audio resampler
//
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
//   2011 Free Software Foundation, Inc
// 
// 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 3 of the License, or
// (at your option) any later version.
// 
// This program 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 General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


#ifndef __GNASH_UTIL_H
#define __GNASH_UTIL_H

#include <boost/cstdint.hpp> // for boost::int16_t

namespace gnash {
namespace media {


/// VERY crude audio resampler
class AudioResampler {

public:

        /// VERY crude sample-rate and stereo conversion.
        //
        /// Converts input data to output format.
        //
        /// @param adjusted_data
        /// Where the converted data is placed (output). WARNING: even though
        /// the type of the output data is int16, the adjusted_size output
        /// parameter is in bytes.
        ///
        /// @param adjusted_size
        /// The size of the converted data (output) in bytes.
        ///
        /// @param data
        /// Data that needs to be converted (input).
        ///
        /// @param sample_count
        /// The datas current sample count (input).
        /// 
        /// @param sample_size
        /// The datas current sample size (input) in bytes.
        ///
        /// @param sample_rate
        /// The datas current sample rate (input).
        ///
        /// @param stereo
        /// Whether the current data is in stereo (input).
        ///
        /// @param m_sample_rate
        /// The samplerate we which to convert to (output).
        ///
        /// @param m_stereo
        /// Do we want the output data to be in stereo (output)?
        static void convert_raw_data(boost::int16_t** adjusted_data,
                  int* adjusted_size, void* data, int sample_count,
                  int sample_size, int sample_rate, bool stereo,
                  int m_sample_rate, bool m_stereo);
};

} // namespace media
} // namespace gnash

#endif // __GNASH_UTIL_H


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