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/*******************************************************************************
* Goggles Audio Player Library *
********************************************************************************
* Copyright (C) 2010-2021 by Sander Jansen. All Rights Reserved *
* --- *
* 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, see http://www.gnu.org/licenses. *
********************************************************************************/
#ifndef INPUT_PLUGIN_H
#define INPUT_PLUGIN_H
#include "ap_format.h"
#include "ap_signal.h"
namespace ap {
class MetaInfo;
struct IOContext {
// Access to User Signal
virtual const Signal & signal() = 0;
// check if IO was aborted by user
virtual FXbool aborted() = 0;
// post meta data from io layer
virtual void post_meta(MetaInfo*) = 0;
};
class InputPlugin {
protected:
IOContext * context;
private:
InputPlugin(const InputPlugin&);
InputPlugin &operator=(const InputPlugin&);
public:
InputPlugin(IOContext * ctx) : context(ctx) {}
virtual FXbool open(const FXString & uri) = 0;
FXbool read_int16_be(FXshort&);
FXbool read_uint16_be(FXushort&);
FXbool read_uint24_be(FXuint&);
FXbool read_int32_be(FXint &);
FXbool read_uint32_le(FXuint &);
FXbool read_uint32_be(FXuint &);
FXbool read_int64_be(FXlong &);
FXbool read_uint64_be(FXulong &);
FXbool read_float_be(FXfloat&);
FXbool read_double_be(FXdouble&);
/// Read ncount bytes, returns -1 for error, -2 for interrupted
virtual FXival read(void*data,FXival ncount) = 0;
//// Read ncount preview bytes. Position of stream doesn't change
virtual FXival preview(void*data,FXival ncount) = 0;
/// Set Position
virtual FXlong position(FXlong offset,FXuint from)=0;
/// Get Position
virtual FXlong position() const=0;
/// Size
virtual FXlong size()=0;
/// End of Input
virtual FXbool eof()=0;
/// Serial
virtual FXbool serial() const=0;
/// Get plugin type
virtual FXuint plugin() const { return Format::Unknown; }
/// Open plugin for given url
static InputPlugin* open(IOContext * ctx,const FXString & url);
/// Destructor
virtual ~InputPlugin() {}
};
}
#endif
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