linux/sound/pci/emu10k1/voice.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 *                   Lee Revell <[email protected]>
 *                   Oswald Buddenhagen <[email protected]>
 *                   Creative Labs, Inc.
 *
 *  Routines for control of EMU10K1 chips - voice manager
 */

#include <linux/time.h>
#include <linux/export.h>
#include <sound/core.h>
#include <sound/emu10k1.h>

/* Previously the voice allocator started at 0 every time.  The new voice 
 * allocator uses a round robin scheme.  The next free voice is tracked in 
 * the card record and each allocation begins where the last left off.  The 
 * hardware requires stereo interleaved voices be aligned to an even/odd 
 * boundary.
 *							--rlrevell
 */

static int voice_alloc(struct snd_emu10k1 *emu, int type, int number,
		       struct snd_emu10k1_pcm *epcm, struct snd_emu10k1_voice **rvoice)
{ … }

static void voice_free(struct snd_emu10k1 *emu,
		       struct snd_emu10k1_voice *pvoice)
{ … }

int snd_emu10k1_voice_alloc(struct snd_emu10k1 *emu, int type, int count, int channels,
			    struct snd_emu10k1_pcm *epcm, struct snd_emu10k1_voice **rvoice)
{ … }

EXPORT_SYMBOL(…);

int snd_emu10k1_voice_free(struct snd_emu10k1 *emu,
			   struct snd_emu10k1_voice *pvoice)
{ … }

EXPORT_SYMBOL(…);