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[v3,10/17] ALSA: emu10k1: fix playback of 8-bit wavetable samples

Message ID 20240406064830.1029573-11-oswald.buddenhagen@gmx.de
State New
Headers show
Series ALSA: emu10k1 & emux: fixes related to wavetable playback | expand

Commit Message

Oswald Buddenhagen April 6, 2024, 6:48 a.m. UTC 
Samples are byte-sized in this mode, and thus the offset calculation
needs no shifting.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
---
 sound/pci/emu10k1/emu10k1_callback.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/sound/pci/emu10k1/emu10k1_callback.c b/sound/pci/emu10k1/emu10k1_callback.c
index 941bfbf812ed..5f6c47cbb809 100644
--- a/sound/pci/emu10k1/emu10k1_callback.c
+++ b/sound/pci/emu10k1/emu10k1_callback.c
@@ -310,27 +310,29 @@  start_voice(struct snd_emux_voice *vp)
 {
 	unsigned int temp;
 	int ch;
+	bool w_16;
 	u32 psst, dsl, map, ccca, vtarget;
 	unsigned int addr, mapped_offset;
 	struct snd_midi_channel *chan;
 	struct snd_emu10k1 *hw;
 	struct snd_emu10k1_memblk *emem;
 	
 	hw = vp->hw;
 	ch = vp->ch;
 	if (snd_BUG_ON(ch < 0))
 		return -EINVAL;
 	chan = vp->chan;
+	w_16 = !(vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_8BITS);
 
 	emem = (struct snd_emu10k1_memblk *)vp->block;
 	if (emem == NULL)
 		return -EINVAL;
 	emem->map_locked++;
 	if (snd_emu10k1_memblk_map(hw, emem) < 0) {
 		/* dev_err(hw->card->devK, "emu: cannot map!\n"); */
 		return -ENOMEM;
 	}
-	mapped_offset = snd_emu10k1_memblk_offset(emem) >> 1;
+	mapped_offset = snd_emu10k1_memblk_offset(emem) >> w_16;
 	vp->reg.start += mapped_offset;
 	vp->reg.end += mapped_offset;
 	vp->reg.loopstart += mapped_offset;
@@ -371,7 +373,7 @@  start_voice(struct snd_emux_voice *vp)
 		unsigned int shift = (vp->apitch - 0xe000) >> 10;
 		ccca |= shift << 25;
 	}
-	if (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_8BITS)
+	if (!w_16)
 		ccca |= CCCA_8BITSELECT;
 
 	vtarget = (unsigned int)vp->vtarget << 16;