linux-kernel - [PATCH] ALSA: aloop: Support S24 sample formats

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Date:   Mon, 25 Mar 2019 16:14:14 +0100
From:   <twischer@...adit-jv.com>
To:     <patch@...a-project.org>, <broonie@...nel.org>, <perex@...ex.cz>,
        <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        Timo Wischer <twischer@...adit-jv.com>
Subject: [PATCH] ALSA: aloop: Support S24 sample formats

From: Timo Wischer <twischer@...adit-jv.com>

Currently snd_aloop supports only S16 and S32 audio sample formats. With
this patch the S24 formats are also supported.

Signed-off-by: Timo Wischer <twischer@...adit-jv.com>
---
 sound/drivers/aloop.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index 8c3fbe1..c14e57b 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -337,7 +337,7 @@ static int loopback_prepare(struct snd_pcm_substream *substream)
 
 	loopback_timer_stop_sync(dpcm);
 
-	salign = (snd_pcm_format_width(runtime->format) *
+	salign = (snd_pcm_format_physical_width(runtime->format) *
 						runtime->channels) / 8;
 	bps = salign * runtime->rate;
 	if (bps <= 0 || salign <= 0)
@@ -562,6 +562,8 @@ static const struct snd_pcm_hardware loopback_pcm_hardware =
 			 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE |
 			 SNDRV_PCM_INFO_RESUME),
 	.formats =	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
+			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |
+			 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 			 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |
 			 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE),
 	.rates =	SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_192000,
-- 
2.7.4