125 lines
3.4 KiB
Plaintext
125 lines
3.4 KiB
Plaintext
//
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// fileprovider.cpp
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// AdPlug
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//
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// Created by Christopher Snowhill on 1/27/18.
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// Copyright © 2018 Christopher Snowhill. All rights reserved.
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//
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#include "fileprovider.h"
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class binistream_cog : public binistream
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{
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id<CogSource> m_file;
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Byte m_buffer[4096];
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int m_buffer_filled, m_buffer_position;
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public:
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binistream_cog( id<CogSource> p_file )
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: m_file( p_file ), m_buffer_filled( 0 ), m_buffer_position( 0 ) { }
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void seek( long pos, Offset offs )
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{
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switch (offs)
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{
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case Set: break;
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case Add:
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if ( ( pos < 0 && m_buffer_position + pos >= 0 ) ||
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( pos >= 0 && m_buffer_position + pos < m_buffer_filled + m_buffer_position ) )
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{
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m_buffer_filled -= pos;
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m_buffer_position += pos;
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err &= ~Eof;
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return;
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}
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else
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pos += [m_file tell] - m_buffer_filled;
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break;
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case End:
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[m_file seek:0 whence:SEEK_END];
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pos += [m_file tell];
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break;
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}
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[m_file seek:0 whence:SEEK_END];
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if (pos < [m_file tell])
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{
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err &= ~Eof;
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[m_file seek:pos whence:SEEK_SET];
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}
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m_buffer_filled = 0;
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m_buffer_position = 0;
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}
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long pos()
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{
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return [m_file tell] - m_buffer_filled;
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}
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Byte getByte()
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{
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if ( err & Eof ) return -1;
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if ( ! m_buffer_filled )
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{
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m_buffer_filled = (int) [m_file read:m_buffer amount:4096];
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if ( ! m_buffer_filled )
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{
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err |= Eof;
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return -1;
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}
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m_buffer_position = 0;
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}
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Byte value = m_buffer[ m_buffer_position ];
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++m_buffer_position;
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--m_buffer_filled;
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return value;
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}
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};
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binistream * CProvider_cog::open(std::string filename) const
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{
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id<CogSource> p_file;
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if ( filename == m_file_path )
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{
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p_file = m_file_hint;
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[p_file seek:0 whence:SEEK_SET];
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}
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if ( p_file == nil )
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{
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NSString * urlString = [NSString stringWithUTF8String:filename.c_str()];
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NSString * fragmentString = @"";
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NSRange fragmentRange = [urlString rangeOfString:@"#" options:NSBackwardsSearch];
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if (fragmentRange.location != NSNotFound) {
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fragmentString = [urlString substringFromIndex:fragmentRange.location];
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urlString = [urlString substringToIndex:fragmentRange.location];
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}
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NSURL * url = [NSURL URLWithString:[[urlString stringByAddingPercentEncodingWithAllowedCharacters:NSCharacterSet.URLFragmentAllowedCharacterSet] stringByAppendingString:fragmentString]];
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id audioSourceClass = NSClassFromString(@"AudioSource");
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p_file = [audioSourceClass audioSourceForURL:url];
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if (![p_file open:url])
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return 0;
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}
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binistream_cog * f = new binistream_cog( p_file );
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if ( f->error() ) { delete f; return 0; }
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f->setFlag(binio::BigEndian, false); f->setFlag(binio::FloatIEEE);
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return f;
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}
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void CProvider_cog::close(binistream *f) const
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{
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binistream_cog * ff = ( binistream_cog * ) f;
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if ( f )
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delete ff;
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}
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