int snd_emu10k1_voice_alloc(struct snd_emu10k1 *emu, int type, int number,
struct snd_emu10k1_voice **rvoice)
{
unsigned long flags;
int result;
if (snd_BUG_ON(!rvoice))
return -EINVAL;
if (snd_BUG_ON(!number))
return -EINVAL;
spin_lock_irqsave(&emu->voice_lock, flags);
for (;;) {
result = voice_alloc(emu, type, number, rvoice);
if (result == 0 || type == EMU10K1_SYNTH || type == EMU10K1_MIDI)
break;
/* free a voice from synth */
if (emu->get_synth_voice) {
result = emu->get_synth_voice(emu);
if (result >= 0) {
struct snd_emu10k1_voice *pvoice = &emu->voices[result];
pvoice->interrupt = NULL;
pvoice->use = pvoice->pcm = pvoice->synth = pvoice->midi = pvoice->efx = 0;
pvoice->epcm = NULL;
}
}
if (result < 0)
break;
}
spin_unlock_irqrestore(&emu->voice_lock, flags);
return result;
}
int snd_emu10k1_voice_alloc(emu10k1_t *emu, emu10k1_voice_type_t type, int number, emu10k1_voice_t **rvoice)
{
unsigned long flags;
int result;
snd_assert(rvoice != NULL, return -EINVAL);
snd_assert(number, return -EINVAL);
spin_lock_irqsave(&emu->voice_lock, flags);
for (;;) {
result = voice_alloc(emu, type, number, rvoice);
if (result == 0 || type == EMU10K1_SYNTH || type == EMU10K1_MIDI)
break;
/* free a voice from synth */
if (emu->get_synth_voice) {
result = emu->get_synth_voice(emu);
if (result >= 0) {
emu10k1_voice_t *pvoice = &emu->voices[result];
pvoice->interrupt = NULL;
pvoice->use = pvoice->pcm = pvoice->synth = pvoice->midi = pvoice->efx = 0;
pvoice->epcm = NULL;
}
}
if (result < 0)
break;
}
spin_unlock_irqrestore(&emu->voice_lock, flags);
return result;
}
static int voice_alloc(struct snd_emu10k1 *emu, int type, int number,
struct snd_emu10k1_voice **rvoice)
{
struct snd_emu10k1_voice *voice;
int i, j, k, first_voice, last_voice, skip;
*rvoice = NULL;
first_voice = last_voice = 0;
for (i = emu->next_free_voice, j = 0; j < NUM_G ; i += number, j += number) {
/*
#ifdef CONFIG_DEBUG_PRINTK
printk(KERN_DEBUG "i %d j %d next free %d!\n",
i, j, emu->next_free_voice);
#else
;
#endif
*/
i %= NUM_G;
/* stereo voices must be even/odd */
if ((number == 2) && (i % 2)) {
i++;
continue;
}
skip = 0;
for (k = 0; k < number; k++) {
voice = &emu->voices[(i+k) % NUM_G];
if (voice->use) {
skip = 1;
break;
}
}
if (!skip) {
#ifdef CONFIG_DEBUG_PRINTK
/* printk(KERN_DEBUG "allocated voice %d\n", i); */
#else
/* ;
#endif
first_voice = i;
last_voice = (i + number) % NUM_G;
emu->next_free_voice = last_voice;
break;
}
}
if (first_voice == last_voice)
return -ENOMEM;
for (i = 0; i < number; i++) {
voice = &emu->voices[(first_voice + i) % NUM_G];
/*
#ifdef CONFIG_DEBUG_PRINTK
printk(kERN_DEBUG "voice alloc - %i, %i of %i\n",
voice->number, idx-first_voice+1, number);
#else
;
#endif
*/
voice->use = 1;
switch (type) {
case EMU10K1_PCM:
voice->pcm = 1;
break;
case EMU10K1_SYNTH:
voice->synth = 1;
break;
case EMU10K1_MIDI:
voice->midi = 1;
break;
case EMU10K1_EFX:
voice->efx = 1;
break;
}
}
*rvoice = &emu->voices[first_voice];
return 0;
}
int snd_emu10k1_voice_alloc(struct snd_emu10k1 *emu, int type, int number,
struct snd_emu10k1_voice **rvoice)
{
unsigned long flags;
int result;
if (snd_BUG_ON(!rvoice))
return -EINVAL;
if (snd_BUG_ON(!number))
return -EINVAL;
spin_lock_irqsave(&emu->voice_lock, flags);
for (;;) {
result = voice_alloc(emu, type, number, rvoice);
if (result == 0 || type == EMU10K1_SYNTH || type == EMU10K1_MIDI)
break;
/* free a voice from synth */
if (emu->get_synth_voice) {
result = emu->get_synth_voice(emu);
if (result >= 0) {
struct snd_emu10k1_voice *pvoice = &emu->voices[result];
pvoice->interrupt = NULL;
pvoice->use = pvoice->pcm = pvoice->synth = pvoice->midi = pvoice->efx = 0;
pvoice->epcm = NULL;
}
}
if (result < 0)
break;
}
spin_unlock_irqrestore(&emu->voice_lock, flags);
return result;
}