mirror of
https://github.com/dhewm/dhewm3.git
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354 lines
11 KiB
C++
354 lines
11 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#include "../idlib/precompiled.h"
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#pragma hdrstop
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#include "snd_local.h"
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::idWaveFile()
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// Desc: Constructs the class. Call Open() to open a wave file for reading.
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// Then call Read() as needed. Calling the destructor or Close()
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// will close the file.
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//-----------------------------------------------------------------------------
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idWaveFile::idWaveFile( void ) {
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memset( &mpwfx, 0, sizeof( waveformatextensible_t ) );
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mhmmio = NULL;
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mdwSize = 0;
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mseekBase = 0;
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mbIsReadingFromMemory = false;
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mpbData = NULL;
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ogg = NULL;
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isOgg = false;
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::~idWaveFile()
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// Desc: Destructs the class
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//-----------------------------------------------------------------------------
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idWaveFile::~idWaveFile( void ) {
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Close();
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if ( mbIsReadingFromMemory && mpbData ) {
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Mem_Free( mpbData );
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}
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memset( &mpwfx, 0, sizeof( waveformatextensible_t ) );
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::Open()
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// Desc: Opens a wave file for reading
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//-----------------------------------------------------------------------------
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int idWaveFile::Open( const char* strFileName, waveformatex_t* pwfx ) {
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mbIsReadingFromMemory = false;
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mpbData = NULL;
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mpbDataCur = mpbData;
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if( strFileName == NULL ) {
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return -1;
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}
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idStr name = strFileName;
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// note: used to only check for .wav when making a build
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name.SetFileExtension( ".ogg" );
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if ( fileSystem->ReadFile( name, NULL, NULL ) != -1 ) {
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return OpenOGG( name, pwfx );
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}
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memset( &mpwfx, 0, sizeof( waveformatextensible_t ) );
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mhmmio = fileSystem->OpenFileRead( strFileName );
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if ( !mhmmio ) {
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mdwSize = 0;
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return -1;
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}
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if ( mhmmio->Length() <= 0 ) {
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mhmmio = NULL;
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return -1;
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}
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if ( ReadMMIO() != 0 ) {
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// ReadMMIO will fail if its an not a wave file
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Close();
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return -1;
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}
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mfileTime = mhmmio->Timestamp();
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if ( ResetFile() != 0 ) {
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Close();
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return -1;
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}
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// After the reset, the size of the wav file is mck.cksize so store it now
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mdwSize = mck.cksize / sizeof( short );
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mMemSize = mck.cksize;
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if ( mck.cksize != 0xffffffff ) {
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if ( pwfx ) {
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memcpy( pwfx, (waveformatex_t *)&mpwfx, sizeof(waveformatex_t));
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}
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return 0;
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}
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return -1;
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::OpenFromMemory()
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// Desc: copy data to idWaveFile member variable from memory
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//-----------------------------------------------------------------------------
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int idWaveFile::OpenFromMemory( short* pbData, int ulDataSize, waveformatextensible_t* pwfx ) {
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mpwfx = *pwfx;
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mulDataSize = ulDataSize;
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mpbData = pbData;
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mpbDataCur = mpbData;
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mdwSize = ulDataSize / sizeof( short );
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mMemSize = ulDataSize;
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mbIsReadingFromMemory = true;
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return 0;
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::ReadMMIO()
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// Desc: Support function for reading from a multimedia I/O stream.
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// mhmmio must be valid before calling. This function uses it to
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// update mckRiff, and mpwfx.
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//-----------------------------------------------------------------------------
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int idWaveFile::ReadMMIO( void ) {
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mminfo_t ckIn; // chunk info. for general use.
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pcmwaveformat_t pcmWaveFormat; // Temp PCM structure to load in.
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memset( &mpwfx, 0, sizeof( waveformatextensible_t ) );
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mhmmio->Read( &mckRiff, 12 );
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assert( !isOgg );
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mckRiff.ckid = LittleLong( mckRiff.ckid );
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mckRiff.cksize = LittleLong( mckRiff.cksize );
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mckRiff.fccType = LittleLong( mckRiff.fccType );
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mckRiff.dwDataOffset = 12;
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// Check to make sure this is a valid wave file
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if( (mckRiff.ckid != fourcc_riff) || (mckRiff.fccType != mmioFOURCC('W', 'A', 'V', 'E') ) ) {
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return -1;
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}
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// Search the input file for for the 'fmt ' chunk.
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ckIn.dwDataOffset = 12;
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do {
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if (8 != mhmmio->Read( &ckIn, 8 ) ) {
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return -1;
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}
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assert( !isOgg );
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ckIn.ckid = LittleLong( ckIn.ckid );
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ckIn.cksize = LittleLong( ckIn.cksize );
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ckIn.dwDataOffset += ckIn.cksize-8;
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} while (ckIn.ckid != mmioFOURCC('f', 'm', 't', ' '));
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// Expect the 'fmt' chunk to be at least as large as <PCMWAVEFORMAT>;
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// if there are extra parameters at the end, we'll ignore them
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if( ckIn.cksize < sizeof(pcmwaveformat_t) ) {
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return -1;
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}
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// Read the 'fmt ' chunk into <pcmWaveFormat>.
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if( mhmmio->Read( &pcmWaveFormat, sizeof(pcmWaveFormat) ) != sizeof(pcmWaveFormat) ) {
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return -1;
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}
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assert( !isOgg );
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pcmWaveFormat.wf.wFormatTag = LittleShort( pcmWaveFormat.wf.wFormatTag );
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pcmWaveFormat.wf.nChannels = LittleShort( pcmWaveFormat.wf.nChannels );
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pcmWaveFormat.wf.nSamplesPerSec = LittleLong( pcmWaveFormat.wf.nSamplesPerSec );
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pcmWaveFormat.wf.nAvgBytesPerSec = LittleLong( pcmWaveFormat.wf.nAvgBytesPerSec );
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pcmWaveFormat.wf.nBlockAlign = LittleShort( pcmWaveFormat.wf.nBlockAlign );
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pcmWaveFormat.wBitsPerSample = LittleShort( pcmWaveFormat.wBitsPerSample );
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// Copy the bytes from the pcm structure to the waveformatex_t structure
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memcpy( &mpwfx, &pcmWaveFormat, sizeof(pcmWaveFormat) );
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// Allocate the waveformatex_t, but if its not pcm format, read the next
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// word, and thats how many extra bytes to allocate.
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if( pcmWaveFormat.wf.wFormatTag == WAVE_FORMAT_TAG_PCM ) {
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mpwfx.Format.cbSize = 0;
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} else {
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return -1; // we don't handle these (32 bit wavefiles, etc)
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#if 0
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// Read in length of extra bytes.
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word cbExtraBytes = 0L;
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if( mhmmio->Read( (char*)&cbExtraBytes, sizeof(word) ) != sizeof(word) )
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return -1;
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mpwfx.Format.cbSize = cbExtraBytes;
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// Now, read those extra bytes into the structure, if cbExtraAlloc != 0.
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if( mhmmio->Read( (char*)(((byte*)&(mpwfx.Format.cbSize))+sizeof(word)), cbExtraBytes ) != cbExtraBytes ) {
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memset( &mpwfx, 0, sizeof( waveformatextensible_t ) );
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return -1;
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}
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#endif
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}
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return 0;
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::ResetFile()
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// Desc: Resets the internal mck pointer so reading starts from the
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// beginning of the file again
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//-----------------------------------------------------------------------------
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int idWaveFile::ResetFile( void ) {
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if( mbIsReadingFromMemory ) {
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mpbDataCur = mpbData;
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} else {
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if( mhmmio == NULL ) {
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return -1;
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}
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// Seek to the data
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if( -1 == mhmmio->Seek( mckRiff.dwDataOffset + sizeof(fourcc), FS_SEEK_SET ) ) {
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return -1;
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}
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// Search the input file for for the 'fmt ' chunk.
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mck.ckid = 0;
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do {
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byte ioin;
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if ( !mhmmio->Read( &ioin, 1 ) ) {
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return -1;
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}
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mck.ckid = (mck.ckid>>8) | (ioin<<24);
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} while (mck.ckid != mmioFOURCC('d', 'a', 't', 'a'));
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mhmmio->Read( &mck.cksize, 4 );
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assert( !isOgg );
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mck.cksize = LittleLong( mck.cksize );
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mseekBase = mhmmio->Tell();
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}
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return 0;
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::Read()
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// Desc: Reads section of data from a wave file into pBuffer and returns
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// how much read in pdwSizeRead, reading not more than dwSizeToRead.
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// This uses mck to determine where to start reading from. So
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// subsequent calls will be continue where the last left off unless
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// Reset() is called.
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//-----------------------------------------------------------------------------
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int idWaveFile::Read( byte* pBuffer, int dwSizeToRead, int *pdwSizeRead ) {
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if ( ogg != NULL ) {
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return ReadOGG( pBuffer, dwSizeToRead, pdwSizeRead );
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} else if ( mbIsReadingFromMemory ) {
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if( mpbDataCur == NULL ) {
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return -1;
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}
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if( (byte*)(mpbDataCur + dwSizeToRead) > (byte*)(mpbData + mulDataSize) ) {
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dwSizeToRead = mulDataSize - (int)(mpbDataCur - mpbData);
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}
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SIMDProcessor->Memcpy( pBuffer, mpbDataCur, dwSizeToRead );
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mpbDataCur += dwSizeToRead;
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if ( pdwSizeRead != NULL ) {
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*pdwSizeRead = dwSizeToRead;
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}
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return dwSizeToRead;
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} else {
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if( mhmmio == NULL ) {
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return -1;
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}
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if( pBuffer == NULL ) {
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return -1;
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}
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dwSizeToRead = mhmmio->Read( pBuffer, dwSizeToRead );
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// this is hit by ogg code, which does it's own byte swapping internally
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if ( !isOgg ) {
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LittleRevBytes( pBuffer, 2, dwSizeToRead / 2 );
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}
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if ( pdwSizeRead != NULL ) {
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*pdwSizeRead = dwSizeToRead;
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}
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return dwSizeToRead;
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}
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::Close()
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// Desc: Closes the wave file
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//-----------------------------------------------------------------------------
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int idWaveFile::Close( void ) {
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if ( ogg != NULL ) {
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return CloseOGG();
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}
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if( mhmmio != NULL ) {
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fileSystem->CloseFile( mhmmio );
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mhmmio = NULL;
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}
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return 0;
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}
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//-----------------------------------------------------------------------------
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// Name: idWaveFile::Seek()
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//-----------------------------------------------------------------------------
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int idWaveFile::Seek( int offset ) {
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if ( ogg != NULL ) {
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common->FatalError( "idWaveFile::Seek: cannot seek on an OGG file\n" );
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} else if( mbIsReadingFromMemory ) {
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mpbDataCur = mpbData + offset;
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} else {
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if( mhmmio == NULL ) {
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return -1;
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}
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if ((int)(offset+mseekBase) == mhmmio->Tell()) {
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return 0;
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}
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mhmmio->Seek( offset + mseekBase, FS_SEEK_SET );
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return 0;
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}
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return -1;
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}
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