160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
//=======================================================================
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// Copyright XashXT Group 2009 ©
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// s_dsp.c - digital signal processing algorithms for audio FX
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//=======================================================================
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#include "common.h"
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#include "sound.h"
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#include "room_int.h"
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convar_t *dsp_room; // room dsp preset - sounds more distant from player (1ch)
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convar_t *dsp_room_type;
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convar_t *dsp_stereo; // set to 1 for true stereo processing. 2x perf hit.
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int ipset_room_prev;
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int ipset_room_typeprev;
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int idsp_room;
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static DSP_FUNCTIONS gDspFuncs;
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static dll_info_t room_dll = { "room.dll", NULL, NULL, NULL, NULL, false };
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// engine callbacks
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static dsp_enginefuncs_t gEngfuncs =
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{
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pfnRandomFloat,
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pfnRandomLong,
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Con_Printf,
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Con_DPrintf,
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};
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float DSP_GetGain( int idsp )
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{
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if( !room_dll.link ) return 0.0f;
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return gDspFuncs.pfnDSP_GetGain( idsp );
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}
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void DSP_ClearState( void )
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{
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if( !room_dll.link ) return;
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Cvar_SetFloat( "dsp_room", 0.0f );
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Cvar_SetFloat( "room_type", 0.0f );
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CheckNewDspPresets();
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gDspFuncs.pfnVidInit();
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}
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void DSP_Process( int idsp, portable_samplepair_t *pbfront, int sampleCount )
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{
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ASSERT( pbfront );
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// return right away if fx processing is turned off
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if( !room_dll.link || dsp_off->integer ) return;
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gDspFuncs.pfnDSP_Process( idsp, pbfront, sampleCount );
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}
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// free all dsp processors
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void FreeDsps( void )
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{
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if( !room_dll.link ) return;
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gDspFuncs.pfnDSP_Free( idsp_room );
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idsp_room = 0;
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gDspFuncs.pfnShutdown();
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Sys_FreeLibrary( &room_dll );
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Mem_Set( &gDspFuncs, 0, sizeof( gDspFuncs ));
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}
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// alloc dsp processors
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qboolean AllocDsps( void )
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{
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static ROOMAPI InitDSP;
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static dsp_enginefuncs_t gpEngfuncs;
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if( !Sys_LoadLibrary( NULL, &room_dll ))
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{
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MsgDev( D_INFO, "DSP: disabled\n" );
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return false;
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}
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InitDSP = (ROOMAPI)Sys_GetProcAddress( &room_dll, "InitDSP" );
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if( !InitDSP )
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{
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Sys_FreeLibrary( &room_dll );
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MsgDev( D_ERROR, "AllocDsps: failed to get address of InitDSP proc\n" );
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return false;
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}
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// make local copy of engfuncs to prevent overwrite it with user dll
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Mem_Copy( &gpEngfuncs, &gEngfuncs, sizeof( gpEngfuncs ));
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if( !InitDSP( &gDspFuncs, &gpEngfuncs, DSP_VERSION ))
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{
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Sys_FreeLibrary( &room_dll );
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MsgDev( D_ERROR, "AllocDsps: can't init DSP\n" );
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return false;
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}
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gDspFuncs.pfnInit();
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idsp_room = -1.0;
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// initialize DSP cvars
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dsp_room = Cvar_Get( "dsp_room", "0", 0, "room dsp preset - sounds more distant from player (1ch)" );
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dsp_room_type = Cvar_Get( "room_type", "0", 0, "duplicate for dsp_room cvar for backward compatibility" );
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dsp_stereo = Cvar_Get( "dsp_stereo", "0", 0, "set to 1 for true stereo processing. 2x perf hits" );
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// alloc dsp room channel (mono, stereo if dsp_stereo is 1)
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// dsp room is mono, 300ms fade time
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idsp_room = gDspFuncs.pfnDSP_Alloc( dsp_room->integer, 300, dsp_stereo->integer * 2 );
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// init prev values
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ipset_room_prev = dsp_room->integer;
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ipset_room_typeprev = dsp_room_type->integer;
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if( idsp_room < 0 )
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{
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MsgDev( D_WARN, "DSP processor failed to initialize! \n" );
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FreeDsps();
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return false;
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}
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return true;
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}
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void CheckNewDspPresets( void )
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{
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int iroomtype;
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int iroom;
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if( !room_dll.link ) return;
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iroomtype = dsp_room_type->integer;
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if( s_listener.waterlevel > 2 )
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iroom = 15;
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else if( s_listener.inmenu )
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iroom = 0;
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else iroom = dsp_room->integer;
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// legacy code support for "room_type" Cvar
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if( iroomtype != ipset_room_typeprev )
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{
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// force dsp_room = room_type
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ipset_room_typeprev = iroomtype;
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Cvar_SetFloat( "dsp_room", iroomtype );
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}
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if( iroom != ipset_room_prev )
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{
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gDspFuncs.pfnDSP_SetPreset( idsp_room, iroom );
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ipset_room_prev = iroom;
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// force room_type = dsp_room
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Cvar_SetFloat( "room_type", iroom );
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ipset_room_typeprev = iroom;
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}
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} |