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Reader.hx
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Reader.hx
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/*
* format - Haxe File Formats
*
* Copyright (c) 2008, The Haxe Project Contributors
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE HAXE PROJECT CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE HAXE PROJECT CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package format.flv;
import format.flv.Data;
class Reader {
var ch : haxe.io.Input;
public function new( i ) {
this.ch = i;
i.bigEndian = true;
}
public function close() {
ch.close();
}
inline function readInt() {
#if haxe3
return ch.readInt32();
#else
return ch.readUInt30();
#end
}
public function readHeader() : Header {
if( ch.readString(3) != 'FLV' )
throw "Invalid signature";
if( ch.readByte() != 0x01 )
throw "Invalid version";
var flags = ch.readByte();
if( flags & 0xF2 != 0 )
throw "Invalid type flags "+flags;
var offset = readInt();
if( offset != 0x09 )
throw "Invalid offset "+offset;
var prev = readInt();
if( prev != 0 )
throw "Invalid prev "+prev;
return {
hasAudio : (flags & 1) != 0,
hasVideo : (flags & 4) != 0,
hasMeta : (flags & 8) != 0,
};
}
public function readChunk() : Null<Data> {
var k;
try
k = ch.readByte()
catch( e : haxe.io.Eof )
return null;
var size = ch.readUInt24();
var time = ch.readUInt24();
var reserved = readInt();
if( reserved != 0 )
throw "Invalid reserved "+reserved;
var data = ch.read(size);
var size2 = readInt();
if( size2 != 0 && size2 != size + 11 )
throw "Invalid size2 ("+size+" != "+size2+")";
return switch( k ) {
case 0x08:
FLVAudio(data,time);
case 0x09:
FLVVideo(data,time);
case 0x12:
FLVMeta(data,time);
default:
throw "Invalid FLV tag "+k;
}
}
}