mirror of
https://github.com/ZDoom/raze-gles.git
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128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
/*
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** rts.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright 2019 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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#include <stdint.h>
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#include "zstring.h"
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#include "tarray.h"
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#include "cache1d.h"
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#include "rts.h"
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#include "m_swap.h"
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struct WadInfo
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{
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char identification[4];
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int32_t numlumps;
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int32_t infotableofs;
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};
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struct FileLump
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{
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int32_t position;
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int32_t size;
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char name[8];
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};
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struct LumpInfoInternal
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{
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int32_t position, size;
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};
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//=============
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// STATICS
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//=============
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static FString RTSName;
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static TArray<uint8_t> RTSFile;
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static TArray<LumpInfoInternal> LumpInfo;
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void RTS_Init(const char *filename)
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{
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// Don't do anything before actually requesting some data from it.
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// In most cases this is never ever used, so just remember the file name for later.
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RTSName = filename;
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}
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bool RTS_IsInitialized()
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{
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if (LumpInfo.Size() > 0) return true;
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if (RTSName.IsEmpty()) return false;
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auto fr = kopenFileReader(RTSName, 0);
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RTSName = ""; // don't try ever again.
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if (!fr.isOpen()) return false;
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RTSFile = fr.Read();
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if (RTSFile.Size() >= 28) // minimum size for one entry
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{
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WadInfo *wi = (WadInfo*)RTSFile.Data();
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if (!memcmp(wi->identification, "IWAD", 4))
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{
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auto numlumps = LittleLong(wi->numlumps);
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if (numlumps >= 1)
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{
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FileLump *li = (FileLump*)(RTSFile.Data() + LittleLong(wi->infotableofs));
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LumpInfo.Resize(numlumps);
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for(unsigned i = 0; i < numlumps; i++, li++)
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{
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LumpInfo[i] = { LittleLong(li->position), LittleLong(li->size) };
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if (unsigned(LumpInfo[i].position + LumpInfo[i].size) >= RTSFile.Size())
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{
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LumpInfo[i].size = 0; // points to invalid data
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}
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}
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return true;
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}
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}
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}
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RTSFile.Reset();
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LumpInfo.Reset();
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return false;
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}
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int RTS_SoundLength(int lump)
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{
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if (!RTS_IsInitialized()) return 0;
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lump++;
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if ((unsigned)lump >= LumpInfo.Size()) return 0;
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return LumpInfo[lump].size;
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}
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void *RTS_GetSound(int lump)
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{
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if (!RTS_IsInitialized()) return nullptr;
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lump++;
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if ((unsigned)lump >= LumpInfo.Size()) return nullptr;
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if(LumpInfo[lump].size <= 0) return nullptr;
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return RTSFile.Data() + LumpInfo[lump].position;
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}
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