mirror of
https://github.com/Q3Rally-Team/q3rally.git
synced 2024-12-16 23:31:22 +00:00
291 lines
5.7 KiB
C
291 lines
5.7 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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Copyright (C) 2005 Stuart Dalton (badcdev@gmail.com)
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, 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 Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#include "client.h"
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#include "snd_codec.h"
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/*
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=================
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FGetLittleLong
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=================
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*/
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static int FGetLittleLong( fileHandle_t f ) {
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int v;
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FS_Read( &v, sizeof(v), f );
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return LittleLong( v);
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}
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/*
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=================
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FGetLittleShort
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=================
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*/
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static short FGetLittleShort( fileHandle_t f ) {
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short v;
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FS_Read( &v, sizeof(v), f );
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return LittleShort( v);
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}
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/*
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=================
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S_ReadChunkInfo
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=================
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*/
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static int S_ReadChunkInfo(fileHandle_t f, char *name)
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{
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int len, r;
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name[4] = 0;
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r = FS_Read(name, 4, f);
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if(r != 4)
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return -1;
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len = FGetLittleLong(f);
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if( len < 0 ) {
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Com_Printf( S_COLOR_YELLOW "WARNING: Negative chunk length\n" );
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return -1;
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}
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return len;
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}
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/*
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=================
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S_FindRIFFChunk
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Returns the length of the data in the chunk, or -1 if not found
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=================
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*/
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static int S_FindRIFFChunk( fileHandle_t f, char *chunk ) {
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char name[5];
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int len;
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while( ( len = S_ReadChunkInfo(f, name) ) >= 0 )
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{
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// If this is the right chunk, return
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if( !Q_strncmp( name, chunk, 4 ) )
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return len;
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len = PAD( len, 2 );
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// Not the right chunk - skip it
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FS_Seek( f, len, FS_SEEK_CUR );
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}
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return -1;
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}
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/*
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=================
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S_ByteSwapRawSamples
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=================
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*/
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static void S_ByteSwapRawSamples( int samples, int width, int s_channels, const byte *data ) {
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int i;
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if ( width != 2 ) {
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return;
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}
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if ( LittleShort( 256 ) == 256 ) {
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return;
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}
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if ( s_channels == 2 ) {
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samples <<= 1;
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}
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for ( i = 0 ; i < samples ; i++ ) {
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((short *)data)[i] = LittleShort( ((short *)data)[i] );
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}
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}
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/*
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=================
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S_ReadRIFFHeader
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=================
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*/
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static qboolean S_ReadRIFFHeader(fileHandle_t file, snd_info_t *info)
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{
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char dump[16];
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int bits;
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int fmtlen = 0;
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// skip the riff wav header
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FS_Read(dump, 12, file);
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// Scan for the format chunk
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if((fmtlen = S_FindRIFFChunk(file, "fmt ")) < 0)
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{
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Com_Printf( S_COLOR_RED "ERROR: Couldn't find \"fmt\" chunk\n");
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return qfalse;
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}
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// Save the parameters
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FGetLittleShort(file); // wav_format
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info->channels = FGetLittleShort(file);
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info->rate = FGetLittleLong(file);
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FGetLittleLong(file);
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FGetLittleShort(file);
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bits = FGetLittleShort(file);
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if( bits < 8 )
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{
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Com_Printf( S_COLOR_RED "ERROR: Less than 8 bit sound is not supported\n");
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return qfalse;
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}
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info->width = bits / 8;
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info->dataofs = 0;
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// Skip the rest of the format chunk if required
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if(fmtlen > 16)
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{
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fmtlen -= 16;
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FS_Seek( file, fmtlen, FS_SEEK_CUR );
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}
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// Scan for the data chunk
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if( (info->size = S_FindRIFFChunk(file, "data")) < 0)
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{
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Com_Printf( S_COLOR_RED "ERROR: Couldn't find \"data\" chunk\n");
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return qfalse;
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}
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info->samples = (info->size / info->width) / info->channels;
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return qtrue;
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}
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// WAV codec
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snd_codec_t wav_codec =
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{
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"wav",
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S_WAV_CodecLoad,
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S_WAV_CodecOpenStream,
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S_WAV_CodecReadStream,
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S_WAV_CodecCloseStream,
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NULL
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};
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/*
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=================
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S_WAV_CodecLoad
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=================
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*/
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void *S_WAV_CodecLoad(const char *filename, snd_info_t *info)
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{
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fileHandle_t file;
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void *buffer;
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// Try to open the file
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FS_FOpenFileRead(filename, &file, qtrue);
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if(!file)
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{
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return NULL;
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}
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// Read the RIFF header
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if(!S_ReadRIFFHeader(file, info))
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{
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FS_FCloseFile(file);
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Com_Printf( S_COLOR_RED "ERROR: Incorrect/unsupported format in \"%s\"\n",
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filename);
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return NULL;
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}
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// Allocate some memory
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buffer = Hunk_AllocateTempMemory(info->size);
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if(!buffer)
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{
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FS_FCloseFile(file);
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Com_Printf( S_COLOR_RED "ERROR: Out of memory reading \"%s\"\n",
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filename);
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return NULL;
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}
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// Read, byteswap
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FS_Read(buffer, info->size, file);
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S_ByteSwapRawSamples(info->samples, info->width, info->channels, (byte *)buffer);
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// Close and return
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FS_FCloseFile(file);
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return buffer;
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}
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/*
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=================
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S_WAV_CodecOpenStream
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=================
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*/
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snd_stream_t *S_WAV_CodecOpenStream(const char *filename)
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{
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snd_stream_t *rv;
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// Open
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rv = S_CodecUtilOpen(filename, &wav_codec);
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if(!rv)
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return NULL;
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// Read the RIFF header
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if(!S_ReadRIFFHeader(rv->file, &rv->info))
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{
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S_CodecUtilClose(&rv);
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return NULL;
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}
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return rv;
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}
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/*
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=================
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S_WAV_CodecCloseStream
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=================
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*/
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void S_WAV_CodecCloseStream(snd_stream_t *stream)
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{
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S_CodecUtilClose(&stream);
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}
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/*
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=================
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S_WAV_CodecReadStream
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=================
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*/
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int S_WAV_CodecReadStream(snd_stream_t *stream, int bytes, void *buffer)
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{
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int remaining = stream->info.size - stream->pos;
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int samples;
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if(remaining <= 0)
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return 0;
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if(bytes > remaining)
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bytes = remaining;
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stream->pos += bytes;
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samples = (bytes / stream->info.width) / stream->info.channels;
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FS_Read(buffer, bytes, stream->file);
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S_ByteSwapRawSamples(samples, stream->info.width, stream->info.channels, buffer);
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return bytes;
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}
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