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https://github.com/KolibriOS/kolibrios.git
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56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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/*
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Copyright (C) 1996-1997 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.
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See the 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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#include "quakedef.h"
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extern int desired_speed;
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extern int desired_bits;
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qboolean SNDDMA_Init(void)
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{
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int size;
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size = 16384 + sizeof(dma_t);
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shm = malloc (size);
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memset((void*)shm, 0, size);
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shm->buffer = (char*)shm + sizeof(dma_t);
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shm->channels = 2;
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shm->speed = desired_speed;
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shm->samplebits = desired_bits;
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shm->samples = 16384 / (desired_bits / 8);
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shm->submission_chunk = 1;
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return true;
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}
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// return the current sample position (in mono samples read)
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// inside the recirculating dma buffer
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int SNDDMA_GetDMAPos(void)
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{
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shm->samplepos = (int)(realtime*shm->speed*shm->channels) & (shm->samples-1);
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return shm->samplepos;
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}
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void SNDDMA_Shutdown(void)
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{
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}
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