mirror of
https://github.com/id-Software/Wolf3D-iOS.git
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Source release of Wolfenstein 3D Classic Platinum for iOS, 1.1
This commit is contained in:
Travis Bradshaw
241
wolf3d/code/env/wavfile.c
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241
wolf3d/code/env/wavfile.c
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/*
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Copyright (C) 2004 Michael Liebscher
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Copyright (C) 1997-2001 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* wav.c: Wav file loader.
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*
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* Author: Michael Liebscher <johnnycanuck@users.sourceforge.net>
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* Date: 2004
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*
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* Acknowledgement:
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* This code was derived from Quake II, and was originally
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* written by Id Software, Inc.
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*
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*/
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#include "../wolfiphone.h"
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PRIVATE W8 *iff_pdata;
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PRIVATE W8 *iff_end;
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PRIVATE W8 *iff_last_chunk;
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PRIVATE W8 *iff_data;
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PRIVATE int iff_chunk_len;
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PRIVATE short Wav_GetLittleShort( void )
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{
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short val = 0;
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val = *iff_pdata;
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val += (*(iff_pdata + 1) << 8);
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iff_pdata += 2;
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return val;
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}
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PRIVATE int Wav_GetLittleLong( void )
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{
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int val = 0;
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val = *iff_pdata;
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val += (*(iff_pdata + 1) << 8);
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val += (*(iff_pdata + 2) << 16);
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val += (*(iff_pdata + 3) << 24);
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iff_pdata += 4;
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return val;
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}
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PRIVATE void Wav_FindNextChunk( const char *name )
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{
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while( 1 )
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{
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iff_pdata = iff_last_chunk;
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if( iff_pdata >= iff_end )
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{
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// Didn't find the chunk
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iff_pdata = NULL;
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return;
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}
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iff_pdata += 4;
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iff_chunk_len = Wav_GetLittleLong();
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if( iff_chunk_len < 0 )
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{
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iff_pdata = NULL;
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return;
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}
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iff_pdata -= 8;
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iff_last_chunk = iff_pdata + 8 + ((iff_chunk_len + 1) & ~1);
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if( ! my_strnicmp((const char *)iff_pdata, name, 4) )
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{
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return;
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}
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}
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}
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PRIVATE void Wav_FindChunk( const char *name )
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{
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iff_last_chunk = iff_data;
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Wav_FindNextChunk( name );
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}
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PRIVATE void DumpChunks( void )
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{
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char str[ 5 ];
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str[ 4 ] = 0;
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iff_pdata = iff_data;
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do
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{
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memcpy( str, iff_pdata, 4 );
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iff_pdata += 4;
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iff_chunk_len = Wav_GetLittleLong();
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Com_Printf( "0x%x : %s (%d)\n", (int)(iff_pdata - 4), str, iff_chunk_len );
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iff_pdata += (iff_chunk_len + 1) & ~1;
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} while( iff_pdata < iff_end );
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}
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/*
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-----------------------------------------------------------------------------
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Function: LoadWavInfo -Load wav file.
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Parameters: filename -[in] Name of wav file to load.
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wav -[out] wav data.
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info -[out] wav sound info.
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Returns: True if file loaded, otherwise false.
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Notes: Caller is responsible for freeing wav data by calling Z_Free.
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-----------------------------------------------------------------------------
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*/
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PUBLIC _boolean LoadWavInfo( const char *filename, W8 **wav, soundInfo_t *info )
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{
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filehandle_t *hFile;
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W8 *data;
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W32 wavlength;
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hFile = FS_OpenFile( filename, 0 );
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if( ! hFile )
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{
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return false;
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}
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data = (PW8)FS_GetLoadedFilePointer( hFile, SEEK_SET );
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wavlength = FS_GetFileSize( hFile );
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iff_data = data;
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iff_end = data + wavlength;
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// look for RIFF signature
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Wav_FindChunk( "RIFF" );
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if( ! (iff_pdata && ! my_strnicmp( (const char *)iff_pdata + 8, "WAVE", 4 ) ) )
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{
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Com_DPrintf( "[LoadWavInfo]: Missing RIFF/WAVE chunks (%s)\n", filename );
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FS_CloseFile( hFile );
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return false;
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}
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// Get "fmt " chunk
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iff_data = iff_pdata + 12;
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Wav_FindChunk( "fmt " );
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if( ! iff_pdata )
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{
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Com_DPrintf( "[LoadWavInfo]: Missing fmt chunk (%s)\n", filename );
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FS_CloseFile( hFile );
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return false;
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}
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iff_pdata += 8;
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if( Wav_GetLittleShort() != 1 )
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{
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Com_DPrintf( "[LoadWavInfo]: Microsoft PCM format only (%s)\n", filename );
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FS_CloseFile( hFile );
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return false;
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}
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info->channels = Wav_GetLittleShort();
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info->sample_rate = Wav_GetLittleLong();
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iff_pdata += 4;
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info->sample_size = Wav_GetLittleShort(); // Bytes Per Sample
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if (info->sample_size != 1 && info->sample_size != 2)
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{
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Com_DPrintf( "[LoadWavInfo]: only 8 and 16 bit WAV files supported (%s)\n", filename );
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FS_CloseFile( hFile );
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return false;
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}
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iff_pdata += 2;
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// Find data chunk
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Wav_FindChunk( "data" );
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if( ! iff_pdata )
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{
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Com_DPrintf( "[LoadWavInfo]: missing 'data' chunk (%s)\n", filename );
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FS_CloseFile( hFile );
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return false;
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}
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iff_pdata += 4;
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info->samples = Wav_GetLittleLong() / info->sample_size;
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if( info->samples <= 0 )
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{
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Com_DPrintf( "[LoadWavInfo]: file with 0 samples (%s)\n", filename );
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FS_CloseFile( hFile );
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return false;
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}
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// Load the data
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*wav = Z_Malloc( info->samples * info->sample_size );
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memcpy( *wav, data + (iff_pdata - data), info->samples * info->sample_size );
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FS_CloseFile( hFile );
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return true;
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}
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