[alsa-devel] [PATCH] Fix DSD formats userland usability

[Jurgen Kramer]

Support for DSD sample formats has been added a while ago. This patch makes
those sample formats beter usable from userland (e.g. aplay).

---
 include/sound/asound.h | 4 +++-
 src/pcm/pcm_misc.c     | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/sound/asound.h b/include/sound/asound.h
index c819df4..5194524 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -214,7 +214,9 @@ typedef int __bitwise snd_pcm_format_t;
 #define	SNDRV_PCM_FORMAT_G723_24_1B	((__force snd_pcm_format_t) 45) /* 1 sample in 1 byte */
 #define	SNDRV_PCM_FORMAT_G723_40	((__force snd_pcm_format_t) 46) /* 8 Samples in 5 bytes */
 #define	SNDRV_PCM_FORMAT_G723_40_1B	((__force snd_pcm_format_t) 47) /* 1 sample in 1 byte */
-#define	SNDRV_PCM_FORMAT_LAST		SNDRV_PCM_FORMAT_G723_40_1B
+#define SNDRV_PCM_FORMAT_DSD_U8		((__force snd_pcm_format_t) 48) /* 8 1-bit samples in 1 byte */
+#define SNDRV_PCM_FORMAT_DSD_U16_LE	((__force snd_pcm_format_t) 49) /* 16 1-bit samples in 2 bytes */
+#define	SNDRV_PCM_FORMAT_LAST		SNDRV_PCM_FORMAT_DSD_U16_LE
 
 #ifdef SNDRV_LITTLE_ENDIAN
 #define	SNDRV_PCM_FORMAT_S16		SNDRV_PCM_FORMAT_S16_LE
diff --git a/src/pcm/pcm_misc.c b/src/pcm/pcm_misc.c
index d52160c..44bb89c 100644
--- a/src/pcm/pcm_misc.c
+++ b/src/pcm/pcm_misc.c
@@ -195,11 +195,13 @@ int snd_pcm_format_width(snd_pcm_format_t format)
 	switch (format) {
 	case SNDRV_PCM_FORMAT_S8:
 	case SNDRV_PCM_FORMAT_U8:
+	case SNDRV_PCM_FORMAT_DSD_U8:
 		return 8;
 	case SNDRV_PCM_FORMAT_S16_LE:
 	case SNDRV_PCM_FORMAT_S16_BE:
 	case SNDRV_PCM_FORMAT_U16_LE:
 	case SNDRV_PCM_FORMAT_U16_BE:
+	case SNDRV_PCM_FORMAT_DSD_U16_LE:
 		return 16;
 	case SNDRV_PCM_FORMAT_S18_3LE:
 	case SNDRV_PCM_FORMAT_S18_3BE:
@@ -253,11 +255,13 @@ int snd_pcm_format_physical_width(snd_pcm_format_t format)
 	switch (format) {
 	case SNDRV_PCM_FORMAT_S8:
 	case SNDRV_PCM_FORMAT_U8:
+	case SNDRV_PCM_FORMAT_DSD_U8:
 		return 8;
 	case SNDRV_PCM_FORMAT_S16_LE:
 	case SNDRV_PCM_FORMAT_S16_BE:
 	case SNDRV_PCM_FORMAT_U16_LE:
 	case SNDRV_PCM_FORMAT_U16_BE:
+	case SNDRV_PCM_FORMAT_DSD_U16_LE:
 		return 16;
 	case SNDRV_PCM_FORMAT_S18_3LE:
 	case SNDRV_PCM_FORMAT_S18_3BE:
-- 
1.9.3