mirror of
https://github.com/torvalds/linux
synced 2024-07-22 03:01:14 +00:00
6d68d9cba1
- Remove the "log-like" parts, following the same logic as the previous commit - Unify format - Add missing major contributors, including myself - Sort entries in order of first contribution (Creative comes last for optical reasons; they don't appear to have directly contributed anyway) Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de> Link: https://lore.kernel.org/r/20230715160839.326978-2-oswald.buddenhagen@gmx.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
* Lee Revell <rlrevell@joe-job.com>
|
|
* Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
|
|
* 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)
|
|
{
|
|
struct snd_emu10k1_voice *voice;
|
|
int i, j, k, skip;
|
|
|
|
for (i = emu->next_free_voice, j = 0; j < NUM_G; i = (i + skip) % NUM_G, j += skip) {
|
|
/*
|
|
dev_dbg(emu->card->dev, "i %d j %d next free %d!\n",
|
|
i, j, emu->next_free_voice);
|
|
*/
|
|
|
|
/* stereo voices must be even/odd */
|
|
if ((number > 1) && (i % 2)) {
|
|
skip = 1;
|
|
continue;
|
|
}
|
|
|
|
for (k = 0; k < number; k++) {
|
|
voice = &emu->voices[i + k];
|
|
if (voice->use) {
|
|
skip = k + 1;
|
|
goto next;
|
|
}
|
|
}
|
|
|
|
for (k = 0; k < number; k++) {
|
|
voice = &emu->voices[i + k];
|
|
voice->use = type;
|
|
voice->epcm = epcm;
|
|
/* dev_dbg(emu->card->dev, "allocated voice %d\n", i + k); */
|
|
}
|
|
voice->last = 1;
|
|
|
|
*rvoice = &emu->voices[i];
|
|
emu->next_free_voice = (i + number) % NUM_G;
|
|
return 0;
|
|
|
|
next: ;
|
|
}
|
|
return -ENOMEM; // -EBUSY would have been better
|
|
}
|
|
|
|
static void voice_free(struct snd_emu10k1 *emu,
|
|
struct snd_emu10k1_voice *pvoice)
|
|
{
|
|
if (pvoice->dirty)
|
|
snd_emu10k1_voice_init(emu, pvoice->number);
|
|
pvoice->interrupt = NULL;
|
|
pvoice->use = pvoice->dirty = pvoice->last = 0;
|
|
pvoice->epcm = NULL;
|
|
}
|
|
|
|
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)
|
|
{
|
|
unsigned long flags;
|
|
int result;
|
|
|
|
if (snd_BUG_ON(!rvoice))
|
|
return -EINVAL;
|
|
if (snd_BUG_ON(!count))
|
|
return -EINVAL;
|
|
if (snd_BUG_ON(!channels))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
|
for (int got = 0; got < channels; ) {
|
|
result = voice_alloc(emu, type, count, epcm, &rvoice[got]);
|
|
if (result == 0) {
|
|
got++;
|
|
/*
|
|
dev_dbg(emu->card->dev, "voice alloc - %i, %i of %i\n",
|
|
rvoice[got - 1]->number, got, want);
|
|
*/
|
|
continue;
|
|
}
|
|
if (type != EMU10K1_SYNTH && emu->get_synth_voice) {
|
|
/* free a voice from synth */
|
|
result = emu->get_synth_voice(emu);
|
|
if (result >= 0) {
|
|
voice_free(emu, &emu->voices[result]);
|
|
continue;
|
|
}
|
|
}
|
|
for (int i = 0; i < got; i++) {
|
|
for (int j = 0; j < count; j++)
|
|
voice_free(emu, rvoice[i] + j);
|
|
rvoice[i] = NULL;
|
|
}
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
|
|
|
return result;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_emu10k1_voice_alloc);
|
|
|
|
int snd_emu10k1_voice_free(struct snd_emu10k1 *emu,
|
|
struct snd_emu10k1_voice *pvoice)
|
|
{
|
|
unsigned long flags;
|
|
int last;
|
|
|
|
if (snd_BUG_ON(!pvoice))
|
|
return -EINVAL;
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
|
do {
|
|
last = pvoice->last;
|
|
voice_free(emu, pvoice++);
|
|
} while (!last);
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_emu10k1_voice_free);
|