[alsa-devel] [PATCH] pcm: add new 32-bit DSD sample format

[Jurgen Kramer]

Add the new DSD_U32_LE sample format to alsa-lib.

NB include/pcm.h and include/sound/asound.h are updated so a new sync with the
kernel headers is not needed

Signed-off-by: Jurgen Kramer <gtmkramer at xs4all.nl>
---
 include/pcm.h          | 4 +++-
 include/sound/asound.h | 3 ++-
 src/pcm/pcm.c          | 2 ++
 src/pcm/pcm_misc.c     | 6 ++++++
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/include/pcm.h b/include/pcm.h
index 11e9f0d..db88ad5 100644
--- a/include/pcm.h
+++ b/include/pcm.h
@@ -211,7 +211,9 @@ typedef enum _snd_pcm_format {
 	SND_PCM_FORMAT_DSD_U8,
 	/* Direct Stream Digital (DSD) in 2-byte samples (x16) */
 	SND_PCM_FORMAT_DSD_U16_LE,
-	SND_PCM_FORMAT_LAST = SND_PCM_FORMAT_DSD_U16_LE,
+	/* Direct Stream Digital (DSD) in 4-byte samples (x32) */
+	SND_PCM_FORMAT_DSD_U32_LE,
+	SND_PCM_FORMAT_LAST = SND_PCM_FORMAT_DSD_U32_LE,
 
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 	/** Signed 16 bit CPU endian */
diff --git a/include/sound/asound.h b/include/sound/asound.h
index 32168f7..6ee5867 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -219,7 +219,8 @@ typedef int __bitwise snd_pcm_format_t;
 #define	SNDRV_PCM_FORMAT_G723_40_1B	((__force snd_pcm_format_t) 47) /* 1 sample in 1 byte */
 #define	SNDRV_PCM_FORMAT_DSD_U8		((__force snd_pcm_format_t) 48) /* DSD, 1-byte samples DSD (x8) */
 #define	SNDRV_PCM_FORMAT_DSD_U16_LE	((__force snd_pcm_format_t) 49) /* DSD, 2-byte samples DSD (x16), little endian */
-#define	SNDRV_PCM_FORMAT_LAST		SNDRV_PCM_FORMAT_DSD_U16_LE
+#define	SNDRV_PCM_FORMAT_DSD_U32_LE	((__force snd_pcm_format_t) 50) /* DSD, 4-byte samples DSD (x32), little endian */
+#define	SNDRV_PCM_FORMAT_LAST		SNDRV_PCM_FORMAT_DSD_U32_LE
 
 #ifdef SNDRV_LITTLE_ENDIAN
 #define	SNDRV_PCM_FORMAT_S16		SNDRV_PCM_FORMAT_S16_LE
diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c
index 1399a5b..2e24338 100644
--- a/src/pcm/pcm.c
+++ b/src/pcm/pcm.c
@@ -1565,6 +1565,7 @@ static const char *const snd_pcm_format_names[] = {
 	FORMAT(G723_40_1B),
 	FORMAT(DSD_U8),
 	FORMAT(DSD_U16_LE),
+	FORMAT(DSD_U32_LE),
 };
 
 static const char *const snd_pcm_format_aliases[SND_PCM_FORMAT_LAST+1] = {
@@ -1624,6 +1625,7 @@ static const char *const snd_pcm_format_descriptions[] = {
 	FORMATD(G723_40_1B, "G.723 (ADPCM) 40 kbit/s, 1 sample in 1 byte"),
 	FORMATD(DSD_U8,  "Direct Stream Digital, 1-byte (x8), oldest bit in MSB"),
 	FORMATD(DSD_U16_LE, "Direct Stream Digital, 2-byte (x16), little endian, oldest bits in MSB"),
+	FORMATD(DSD_U32_LE, "Direct Stream Digital, 4-byte (x32), little endian, oldest bits in MSB"),
 };
 
 static const char *const snd_pcm_type_names[] = {
diff --git a/src/pcm/pcm_misc.c b/src/pcm/pcm_misc.c
index 46fc771..9272179 100644
--- a/src/pcm/pcm_misc.c
+++ b/src/pcm/pcm_misc.c
@@ -64,6 +64,7 @@ int snd_pcm_format_signed(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_U18_3BE:
 	case SNDRV_PCM_FORMAT_DSD_U8:
 	case SNDRV_PCM_FORMAT_DSD_U16_LE:
+	case SNDRV_PCM_FORMAT_DSD_U32_LE:
 		return 0;
 	default:
 		return -EINVAL;
@@ -154,6 +155,7 @@ int snd_pcm_format_little_endian(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_U18_3BE:
 	case SNDRV_PCM_FORMAT_DSD_U8:
 	case SNDRV_PCM_FORMAT_DSD_U16_LE:
+	case SNDRV_PCM_FORMAT_DSD_U32_LE:
 		return 0;
 	default:
 		return -EINVAL;
@@ -232,6 +234,7 @@ int snd_pcm_format_width(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_U32_BE:
 	case SNDRV_PCM_FORMAT_FLOAT_LE:
 	case SNDRV_PCM_FORMAT_FLOAT_BE:
+	case SNDRV_PCM_FORMAT_DSD_U32_LE:
 		return 32;
 	case SNDRV_PCM_FORMAT_FLOAT64_LE:
 	case SNDRV_PCM_FORMAT_FLOAT64_BE:
@@ -292,6 +295,7 @@ int snd_pcm_format_physical_width(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_FLOAT_BE:
 	case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:
 	case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE:
+	case SNDRV_PCM_FORMAT_DSD_U32_LE:
 		return 32;
 	case SNDRV_PCM_FORMAT_FLOAT64_LE:
 	case SNDRV_PCM_FORMAT_FLOAT64_BE:
@@ -348,6 +352,7 @@ ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples)
 	case SNDRV_PCM_FORMAT_U32_BE:
 	case SNDRV_PCM_FORMAT_FLOAT_LE:
 	case SNDRV_PCM_FORMAT_FLOAT_BE:
+	case SNDRV_PCM_FORMAT_DSD_U32_LE:
 		return samples * 4;
 	case SNDRV_PCM_FORMAT_FLOAT64_LE:
 	case SNDRV_PCM_FORMAT_FLOAT64_BE:
@@ -394,6 +399,7 @@ u_int64_t snd_pcm_format_silence_64(snd_pcm_format_t format)
 		return 0x8080808080808080ULL;
 	case SNDRV_PCM_FORMAT_DSD_U8:
 	case SNDRV_PCM_FORMAT_DSD_U16_LE:
+	case SNDRV_PCM_FORMAT_DSD_U32_LE:
 		return 0x6969696969696969ULL;
 #ifdef SNDRV_LITTLE_ENDIAN
 	case SNDRV_PCM_FORMAT_U16_LE:
-- 
1.9.3