[alsa-lib][PATCH v3 1/4] asound.h: add SNDRV_PCM_FORMAT_{S, U}20

[alsa-lib][PATCH v3 1/4] asound.h: add SNDRV_PCM_FORMAT_{S, U}20

[Maciej S. Szmigiero]

This patch adds definitions of 20-bit, 4-byte PCM formats
SNDRV_PCM_FORMAT_{S,U}20, that were recently added to the kernel, to
alsa-lib's own copy of asound.h.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
 include/sound/asound.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/sound/asound.h b/include/sound/asound.h
index 5f659126f066..6041cab27a23 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -213,6 +213,11 @@ typedef int __bitwise snd_pcm_format_t;
 #define	SNDRV_PCM_FORMAT_IMA_ADPCM	((__force snd_pcm_format_t) 22)
 #define	SNDRV_PCM_FORMAT_MPEG		((__force snd_pcm_format_t) 23)
 #define	SNDRV_PCM_FORMAT_GSM		((__force snd_pcm_format_t) 24)
+#define	SNDRV_PCM_FORMAT_S20_LE	((__force snd_pcm_format_t) 25) /* in four bytes, LSB justified */
+#define	SNDRV_PCM_FORMAT_S20_BE	((__force snd_pcm_format_t) 26) /* in four bytes, LSB justified */
+#define	SNDRV_PCM_FORMAT_U20_LE	((__force snd_pcm_format_t) 27) /* in four bytes, LSB justified */
+#define	SNDRV_PCM_FORMAT_U20_BE	((__force snd_pcm_format_t) 28) /* in four bytes, LSB justified */
+/* gap in the numbering for a future standard linear format */
 #define	SNDRV_PCM_FORMAT_SPECIAL	((__force snd_pcm_format_t) 31)
 #define	SNDRV_PCM_FORMAT_S24_3LE	((__force snd_pcm_format_t) 32)	/* in three bytes */
 #define	SNDRV_PCM_FORMAT_S24_3BE	((__force snd_pcm_format_t) 33)	/* in three bytes */
@@ -247,6 +252,8 @@ typedef int __bitwise snd_pcm_format_t;
 #define	SNDRV_PCM_FORMAT_FLOAT		SNDRV_PCM_FORMAT_FLOAT_LE
 #define	SNDRV_PCM_FORMAT_FLOAT64	SNDRV_PCM_FORMAT_FLOAT64_LE
 #define	SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE
+#define	SNDRV_PCM_FORMAT_S20		SNDRV_PCM_FORMAT_S20_LE
+#define	SNDRV_PCM_FORMAT_U20		SNDRV_PCM_FORMAT_U20_LE
 #endif
 #ifdef SNDRV_BIG_ENDIAN
 #define	SNDRV_PCM_FORMAT_S16		SNDRV_PCM_FORMAT_S16_BE
@@ -258,6 +265,8 @@ typedef int __bitwise snd_pcm_format_t;
 #define	SNDRV_PCM_FORMAT_FLOAT		SNDRV_PCM_FORMAT_FLOAT_BE
 #define	SNDRV_PCM_FORMAT_FLOAT64	SNDRV_PCM_FORMAT_FLOAT64_BE
 #define	SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE
+#define	SNDRV_PCM_FORMAT_S20		SNDRV_PCM_FORMAT_S20_BE
+#define	SNDRV_PCM_FORMAT_U20		SNDRV_PCM_FORMAT_U20_BE
 #endif
 
 typedef int __bitwise snd_pcm_subformat_t;

[alsa-lib][PATCH v3 2/4] pcm: add and describe SND_PCM_FORMAT_{S, U}20

[Maciej S. Szmigiero]

This patch adds and describes in various functions that query format
properties SND_PCM_FORMAT_{S,U}20 formats that were recently added to the
kernel as SNDRV_PCM_FORMAT_{S,U}20.

These formats are similar to existing 20-bit PCM formats
SND_PCM_FORMAT_{S,U}20_3, however they occupy 4 bytes instead of 3.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
 include/pcm.h       | 20 ++++++++++++++++++--
 src/pcm/pcm.c       | 10 ++++++++++
 src/pcm/pcm_local.h |  4 ++++
 src/pcm/pcm_misc.c  | 41 ++++++++++++++++++++++++++++++++++++++---
 4 files changed, 70 insertions(+), 5 deletions(-)

diff --git a/include/pcm.h b/include/pcm.h
index e05777a7c221..2619c8cd8bd4 100644
--- a/include/pcm.h
+++ b/include/pcm.h
@@ -175,6 +175,14 @@ typedef enum _snd_pcm_format {
 	SND_PCM_FORMAT_MPEG,
 	/** GSM */
 	SND_PCM_FORMAT_GSM,
+	/** Signed 20bit Little Endian in 4bytes format, LSB justified */
+	SND_PCM_FORMAT_S20_LE,
+	/** Signed 20bit Big Endian in 4bytes format, LSB justified */
+	SND_PCM_FORMAT_S20_BE,
+	/** Unsigned 20bit Little Endian in 4bytes format, LSB justified */
+	SND_PCM_FORMAT_U20_LE,
+	/** Unsigned 20bit Big Endian in 4bytes format, LSB justified */
+	SND_PCM_FORMAT_U20_BE,
 	/** Special */
 	SND_PCM_FORMAT_SPECIAL = 31,
 	/** Signed 24bit Little Endian in 3bytes format */
@@ -239,7 +247,11 @@ typedef enum _snd_pcm_format {
 	/** Float 64 bit CPU endian */
 	SND_PCM_FORMAT_FLOAT64 = SND_PCM_FORMAT_FLOAT64_LE,
 	/** IEC-958 CPU Endian */
-	SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_LE
+	SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_LE,
+	/** Signed 20bit in 4bytes format, LSB justified, CPU Endian */
+	SND_PCM_FORMAT_S20 = SND_PCM_FORMAT_S20_LE,
+	/** Unsigned 20bit in 4bytes format, LSB justified, CPU Endian */
+	SND_PCM_FORMAT_U20 = SND_PCM_FORMAT_U20_LE,
 #elif __BYTE_ORDER == __BIG_ENDIAN
 	/** Signed 16 bit CPU endian */
 	SND_PCM_FORMAT_S16 = SND_PCM_FORMAT_S16_BE,
@@ -258,7 +270,11 @@ typedef enum _snd_pcm_format {
 	/** Float 64 bit CPU endian */
 	SND_PCM_FORMAT_FLOAT64 = SND_PCM_FORMAT_FLOAT64_BE,
 	/** IEC-958 CPU Endian */
-	SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_BE
+	SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_BE,
+	/** Signed 20bit in 4bytes format, LSB justified, CPU Endian */
+	SND_PCM_FORMAT_S20 = SND_PCM_FORMAT_S20_BE,
+	/** Unsigned 20bit in 4bytes format, LSB justified, CPU Endian */
+	SND_PCM_FORMAT_U20 = SND_PCM_FORMAT_U20_BE,
 #else
 #error "Unknown endian"
 #endif
diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c
index 1efb8b9d4e8c..e9ebf383c31b 100644
--- a/src/pcm/pcm.c
+++ b/src/pcm/pcm.c
@@ -1780,6 +1780,10 @@ static const char *const snd_pcm_format_names[] = {
 	FORMAT(IMA_ADPCM),
 	FORMAT(MPEG),
 	FORMAT(GSM),
+	FORMAT(S20_LE),
+	FORMAT(S20_BE),
+	FORMAT(U20_LE),
+	FORMAT(U20_BE),
 	FORMAT(SPECIAL),
 	FORMAT(S24_3LE),
 	FORMAT(S24_3BE),
@@ -1814,6 +1818,8 @@ static const char *const snd_pcm_format_aliases[SND_PCM_FORMAT_LAST+1] = {
 	FORMAT(FLOAT),
 	FORMAT(FLOAT64),
 	FORMAT(IEC958_SUBFRAME),
+	FORMAT(S20),
+	FORMAT(U20),
 };
 
 static const char *const snd_pcm_format_descriptions[] = {
@@ -1842,6 +1848,10 @@ static const char *const snd_pcm_format_descriptions[] = {
 	FORMATD(IMA_ADPCM, "Ima-ADPCM"),
 	FORMATD(MPEG, "MPEG"),
 	FORMATD(GSM, "GSM"),
+	FORMATD(S20_LE, "Signed 20 bit Little Endian in 4 bytes, LSB justified"),
+	FORMATD(S20_BE, "Signed 20 bit Big Endian in 4 bytes, LSB justified"),
+	FORMATD(U20_LE, "Unsigned 20 bit Little Endian in 4 bytes, LSB justified"),
+	FORMATD(U20_BE, "Unsigned 20 bit Big Endian in 4 bytes, LSB justified"),
 	FORMATD(SPECIAL, "Special"),
 	FORMATD(S24_3LE, "Signed 24 bit Little Endian in 3bytes"),
 	FORMATD(S24_3BE, "Signed 24 bit Big Endian in 3bytes"),
diff --git a/src/pcm/pcm_local.h b/src/pcm/pcm_local.h
index 776f8cd3e302..3d95e1749169 100644
--- a/src/pcm/pcm_local.h
+++ b/src/pcm/pcm_local.h
@@ -984,6 +984,10 @@ const snd_config_t *snd_pcm_rate_get_default_converter(snd_config_t *root);
 	 (1U << SND_PCM_FORMAT_S16_BE) | \
 	 (1U << SND_PCM_FORMAT_U16_LE) | \
 	 (1U << SND_PCM_FORMAT_U16_BE) | \
+	 (1U << SND_PCM_FORMAT_S20_LE) | \
+	 (1U << SND_PCM_FORMAT_S20_BE) | \
+	 (1U << SND_PCM_FORMAT_U20_LE) | \
+	 (1U << SND_PCM_FORMAT_U20_BE) | \
 	 (1U << SND_PCM_FORMAT_S24_LE) | \
 	 (1U << SND_PCM_FORMAT_S24_BE) | \
 	 (1U << SND_PCM_FORMAT_U24_LE) | \
diff --git a/src/pcm/pcm_misc.c b/src/pcm/pcm_misc.c
index 5420b1895713..7ee0dac771af 100644
--- a/src/pcm/pcm_misc.c
+++ b/src/pcm/pcm_misc.c
@@ -38,6 +38,8 @@ int snd_pcm_format_signed(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_S8:
 	case SNDRV_PCM_FORMAT_S16_LE:
 	case SNDRV_PCM_FORMAT_S16_BE:
+	case SNDRV_PCM_FORMAT_S20_LE:
+	case SNDRV_PCM_FORMAT_S20_BE:
 	case SNDRV_PCM_FORMAT_S24_LE:
 	case SNDRV_PCM_FORMAT_S24_BE:
 	case SNDRV_PCM_FORMAT_S32_LE:
@@ -52,6 +54,8 @@ int snd_pcm_format_signed(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_U8:
 	case SNDRV_PCM_FORMAT_U16_LE:
 	case SNDRV_PCM_FORMAT_U16_BE:
+	case SNDRV_PCM_FORMAT_U20_LE:
+	case SNDRV_PCM_FORMAT_U20_BE:
 	case SNDRV_PCM_FORMAT_U24_LE:
 	case SNDRV_PCM_FORMAT_U24_BE:
 	case SNDRV_PCM_FORMAT_U32_LE:
@@ -126,6 +130,8 @@ int snd_pcm_format_little_endian(snd_pcm_format_t format)
 	switch (format) {
 	case SNDRV_PCM_FORMAT_S16_LE:
 	case SNDRV_PCM_FORMAT_U16_LE:
+	case SNDRV_PCM_FORMAT_S20_LE:
+	case SNDRV_PCM_FORMAT_U20_LE:
 	case SNDRV_PCM_FORMAT_S24_LE:
 	case SNDRV_PCM_FORMAT_U24_LE:
 	case SNDRV_PCM_FORMAT_S32_LE:
@@ -144,6 +150,8 @@ int snd_pcm_format_little_endian(snd_pcm_format_t format)
 		return 1;
 	case SNDRV_PCM_FORMAT_S16_BE:
 	case SNDRV_PCM_FORMAT_U16_BE:
+	case SNDRV_PCM_FORMAT_S20_BE:
+	case SNDRV_PCM_FORMAT_U20_BE:
 	case SNDRV_PCM_FORMAT_S24_BE:
 	case SNDRV_PCM_FORMAT_U24_BE:
 	case SNDRV_PCM_FORMAT_S32_BE:
@@ -218,6 +226,10 @@ int snd_pcm_format_width(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_U18_3LE:
 	case SNDRV_PCM_FORMAT_U18_3BE:
 		return 18;
+	case SNDRV_PCM_FORMAT_S20_LE:
+	case SNDRV_PCM_FORMAT_S20_BE:
+	case SNDRV_PCM_FORMAT_U20_LE:
+	case SNDRV_PCM_FORMAT_U20_BE:
 	case SNDRV_PCM_FORMAT_S20_3LE:
 	case SNDRV_PCM_FORMAT_S20_3BE:
 	case SNDRV_PCM_FORMAT_U20_3LE:
@@ -289,6 +301,10 @@ int snd_pcm_format_physical_width(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_U24_3LE:
 	case SNDRV_PCM_FORMAT_U24_3BE:
 		return 24;
+	case SNDRV_PCM_FORMAT_S20_LE:
+	case SNDRV_PCM_FORMAT_S20_BE:
+	case SNDRV_PCM_FORMAT_U20_LE:
+	case SNDRV_PCM_FORMAT_U20_BE:
 	case SNDRV_PCM_FORMAT_S24_LE:
 	case SNDRV_PCM_FORMAT_S24_BE:
 	case SNDRV_PCM_FORMAT_U24_LE:
@@ -350,6 +366,10 @@ ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples)
 	case SNDRV_PCM_FORMAT_U24_3LE:
 	case SNDRV_PCM_FORMAT_U24_3BE:
 		return samples * 3;
+	case SNDRV_PCM_FORMAT_S20_LE:
+	case SNDRV_PCM_FORMAT_S20_BE:
+	case SNDRV_PCM_FORMAT_U20_LE:
+	case SNDRV_PCM_FORMAT_U20_BE:
 	case SNDRV_PCM_FORMAT_S24_LE:
 	case SNDRV_PCM_FORMAT_S24_BE:
 	case SNDRV_PCM_FORMAT_U24_LE:
@@ -393,6 +413,8 @@ uint64_t snd_pcm_format_silence_64(snd_pcm_format_t format)
 	case SNDRV_PCM_FORMAT_S8:
 	case SNDRV_PCM_FORMAT_S16_LE:
 	case SNDRV_PCM_FORMAT_S16_BE:
+	case SNDRV_PCM_FORMAT_S20_LE:
+	case SNDRV_PCM_FORMAT_S20_BE:
 	case SNDRV_PCM_FORMAT_S24_LE:
 	case SNDRV_PCM_FORMAT_S24_BE:
 	case SNDRV_PCM_FORMAT_S32_LE:
@@ -415,12 +437,16 @@ uint64_t snd_pcm_format_silence_64(snd_pcm_format_t format)
 #ifdef SNDRV_LITTLE_ENDIAN
 	case SNDRV_PCM_FORMAT_U16_LE:
 		return 0x8000800080008000ULL;
+	case SNDRV_PCM_FORMAT_U20_LE:
+		return 0x0008000000080000ULL;
 	case SNDRV_PCM_FORMAT_U24_LE:
 		return 0x0080000000800000ULL;
 	case SNDRV_PCM_FORMAT_U32_LE:
 		return 0x8000000080000000ULL;
 	case SNDRV_PCM_FORMAT_U16_BE:
 		return 0x0080008000800080ULL;
+	case SNDRV_PCM_FORMAT_U20_BE:
+		return 0x0000080000000800ULL;
 	case SNDRV_PCM_FORMAT_U24_BE:
 		return 0x0000800000008000ULL;
 	case SNDRV_PCM_FORMAT_U32_BE:
@@ -440,12 +466,16 @@ uint64_t snd_pcm_format_silence_64(snd_pcm_format_t format)
 #else
 	case SNDRV_PCM_FORMAT_U16_LE:
 		return 0x0080008000800080ULL;
+	case SNDRV_PCM_FORMAT_U20_LE:
+		return 0x0000080000000800ULL;
 	case SNDRV_PCM_FORMAT_U24_LE:
 		return 0x0000800000008000ULL;
 	case SNDRV_PCM_FORMAT_U32_LE:
 		return 0x0000008000000080ULL;
 	case SNDRV_PCM_FORMAT_U16_BE:
 		return 0x8000800080008000ULL;
+	case SNDRV_PCM_FORMAT_U20_BE:
+		return 0x0008000000080000ULL;
 	case SNDRV_PCM_FORMAT_U24_BE:
 		return 0x0080000000800000ULL;
 	case SNDRV_PCM_FORMAT_U32_BE:
@@ -653,11 +683,13 @@ int snd_pcm_format_set_silence(snd_pcm_format_t format, void *data, unsigned int
 	return 0;
 }
 
-static const int linear_formats[4][2][2] = {
+static const int linear_formats[5][2][2] = {
 	{ { SNDRV_PCM_FORMAT_S8, SNDRV_PCM_FORMAT_S8 },
 	  { SNDRV_PCM_FORMAT_U8, SNDRV_PCM_FORMAT_U8 } },
 	{ { SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_FORMAT_S16_BE },
 	  { SNDRV_PCM_FORMAT_U16_LE, SNDRV_PCM_FORMAT_U16_BE } },
+	{ { SNDRV_PCM_FORMAT_S20_LE, SNDRV_PCM_FORMAT_S20_BE },
+	  { SNDRV_PCM_FORMAT_U20_LE, SNDRV_PCM_FORMAT_U20_BE } },
 	{ { SNDRV_PCM_FORMAT_S24_LE, SNDRV_PCM_FORMAT_S24_BE },
 	  { SNDRV_PCM_FORMAT_U24_LE, SNDRV_PCM_FORMAT_U24_BE } },
 	{ { SNDRV_PCM_FORMAT_S32_LE, SNDRV_PCM_FORMAT_S32_BE },
@@ -706,12 +738,15 @@ snd_pcm_format_t snd_pcm_build_linear_format(int width, int pwidth, int unsignd,
 		case 16:
 			width = 1;
 			break;
-		case 24:
+		case 20:
 			width = 2;
 			break;
-		case 32:
+		case 24:
 			width = 3;
 			break;
+		case 32:
+			width = 4;
+			break;
 		default:
 			return SND_PCM_FORMAT_UNKNOWN;
 		}

[alsa-lib][PATCH v3 3/4] pcm: linear, route: handle linear formats with 20-bit sample on 4 bytes

[Maciej S. Szmigiero]

The previous patch has added 20-bit PCM formats SND_PCM_FORMAT_{S,U}20 to
alsa-lib.
We need to extend the linear format conversion code with handling of these
sample formats so they can also be utilized by applications that only
recognize the more typical ones like SND_PCM_FORMAT_S16.

Since the conversion arrays are indexed by a format bit width divided by 8
the easiest way to handle these formats is to treat them like they were
40-bit wide (the next free integer multiple of 8 bits).
This doesn't create a collision risk with a future format since there can't
really be a 40-bit sample format that occupies 4 bytes.

Make sure we use the getput conversion method for these formats since a
direct conversion from / to them is not supported.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
 src/pcm/pcm_linear.c | 14 +++++++++++---
 src/pcm/pcm_route.c  |  6 ++++--
 src/pcm/plugin_ops.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 61 insertions(+), 9 deletions(-)

diff --git a/src/pcm/pcm_linear.c b/src/pcm/pcm_linear.c
index 0d61e927323f..33e7fc4578f3 100644
--- a/src/pcm/pcm_linear.c
+++ b/src/pcm/pcm_linear.c
@@ -100,8 +100,11 @@ int snd_pcm_linear_get_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_f
 		default:
 			width = 2; break;
 		}
-		return width * 4 + endian * 2 + sign + 16;
+		return width * 4 + endian * 2 + sign + 20;
 	} else {
+		if (width == 20)
+			width = 40;
+
 		width = width / 8 - 1;
 		return width * 4 + endian * 2 + sign;
 	}
@@ -131,8 +134,11 @@ int snd_pcm_linear_put_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_f
 		default:
 			width = 2; break;
 		}
-		return width * 4 + endian * 2 + sign + 16;
+		return width * 4 + endian * 2 + sign + 20;
 	} else {
+		if (width == 20)
+			width = 40;
+
 		width = width / 8 - 1;
 		return width * 4 + endian * 2 + sign;
 	}
@@ -303,7 +309,9 @@ static int snd_pcm_linear_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
 	if (err < 0)
 		return err;
 	linear->use_getput = (snd_pcm_format_physical_width(format) == 24 ||
-			      snd_pcm_format_physical_width(linear->sformat) == 24);
+			      snd_pcm_format_physical_width(linear->sformat) == 24 ||
+			      snd_pcm_format_width(format) == 20 ||
+			      snd_pcm_format_width(linear->sformat) == 20);
 	if (linear->use_getput) {
 		if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
 			linear->get_idx = snd_pcm_linear_get_index(format, SND_PCM_FORMAT_S32);
diff --git a/src/pcm/pcm_route.c b/src/pcm/pcm_route.c
index 1f485a8e79f9..bbcc6118b593 100644
--- a/src/pcm/pcm_route.c
+++ b/src/pcm/pcm_route.c
@@ -565,10 +565,12 @@ static int snd_pcm_route_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
 	}
 	if (err < 0)
 		return err;
-	/* 3 bytes formats? */
+	/* 3 bytes or 20-bit formats? */
 	route->params.use_getput =
 		(snd_pcm_format_physical_width(src_format) + 7) / 8 == 3 ||
-		(snd_pcm_format_physical_width(dst_format) + 7) / 8 == 3;
+		(snd_pcm_format_physical_width(dst_format) + 7) / 8 == 3 ||
+		snd_pcm_format_width(src_format) == 20 ||
+		snd_pcm_format_width(dst_format) == 20;
 	route->params.get_idx = snd_pcm_linear_get_index(src_format, SND_PCM_FORMAT_S32);
 	route->params.put_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, dst_format);
 	route->params.conv_idx = snd_pcm_linear_convert_index(src_format, dst_format);
diff --git a/src/pcm/plugin_ops.h b/src/pcm/plugin_ops.h
index 5a6016adb13a..a784d9c2b320 100644
--- a/src/pcm/plugin_ops.h
+++ b/src/pcm/plugin_ops.h
@@ -21,6 +21,12 @@
 
 #ifndef SX_INLINES
 #define SX_INLINES
+static inline uint32_t sx20(uint32_t x)
+{
+	if(x&0x00080000)
+		return x|0xFFF00000;
+	return x&0x000FFFFF;
+}
 static inline uint32_t sx24(uint32_t x)
 {
 	if(x&0x00800000)
@@ -341,7 +347,7 @@ conv_1234_123C: as_u32(dst) = as_u32c(src) ^ 0x80; goto CONV_END;
 
 #ifdef GET16_LABELS
 /* src_wid src_endswap sign_toggle */
-static void *const get16_labels[4 * 2 * 2 + 4 * 3] = {
+static void *const get16_labels[5 * 2 * 2 + 4 * 3] = {
 	&&get16_1_10,	 /*  8h -> 16h */
 	&&get16_1_90,	 /*  8h ^> 16h */
 	&&get16_1_10,	 /*  8s -> 16h */
@@ -350,6 +356,7 @@ static void *const get16_labels[4 * 2 * 2 + 4 * 3] = {
 	&&get16_12_92,	 /* 16h ^> 16h */
 	&&get16_12_21,	 /* 16s -> 16h */
 	&&get16_12_A1,	 /* 16s ^> 16h */
+	/* 4 byte formats */
 	&&get16_0123_12, /* 24h -> 16h */
 	&&get16_0123_92, /* 24h ^> 16h */
 	&&get16_1230_32, /* 24s -> 16h */
@@ -358,6 +365,10 @@ static void *const get16_labels[4 * 2 * 2 + 4 * 3] = {
 	&&get16_1234_92, /* 32h ^> 16h */
 	&&get16_1234_43, /* 32s -> 16h */
 	&&get16_1234_C3, /* 32s ^> 16h */
+	&&get16_0123_12_20, /* 20h -> 16h */
+	&&get16_0123_92_20, /* 20h ^> 16h */
+	&&get16_1230_32_20, /* 20s -> 16h */
+	&&get16_1230_B2_20, /* 20s ^> 16h */
 	/* 3bytes format */
 	&&get16_123_12,	 /* 24h -> 16h */
 	&&get16_123_92,	 /* 24h ^> 16h */
@@ -390,6 +401,10 @@ get16_1234_12: sample = as_u32c(src) >> 16; goto GET16_END;
 get16_1234_92: sample = (as_u32c(src) >> 16) ^ 0x8000; goto GET16_END;
 get16_1234_43: sample = bswap_16(as_u32c(src)); goto GET16_END;
 get16_1234_C3: sample = bswap_16(as_u32c(src) ^ 0x80); goto GET16_END;
+get16_0123_12_20: sample = as_u32c(src) >> 4; goto GET16_END;
+get16_0123_92_20: sample = (as_u32c(src) >> 4) ^ 0x8000; goto GET16_END;
+get16_1230_32_20: sample = bswap_32(as_u32c(src)) >> 4; goto GET16_END;
+get16_1230_B2_20: sample = (bswap_32(as_u32c(src)) >> 4) ^ 0x8000; goto GET16_END;
 get16_123_12: sample = _get_triple(src) >> 8; goto GET16_END;
 get16_123_92: sample = (_get_triple(src) >> 8) ^ 0x8000; goto GET16_END;
 get16_123_32: sample = _get_triple_s(src) >> 8; goto GET16_END;
@@ -407,7 +422,7 @@ get16_123_B2_18: sample = (_get_triple_s(src) >> 2) ^ 0x8000; goto GET16_END;
 
 #ifdef PUT16_LABELS
 /* dst_wid dst_endswap sign_toggle */
-static void *const put16_labels[4 * 2 * 2 + 4 * 3] = {
+static void *const put16_labels[5 * 2 * 2 + 4 * 3] = {
 	&&put16_12_1,		 /* 16h ->  8h */
 	&&put16_12_9,		 /* 16h ^>  8h */
 	&&put16_12_1,		 /* 16h ->  8s */
@@ -416,6 +431,7 @@ static void *const put16_labels[4 * 2 * 2 + 4 * 3] = {
 	&&put16_12_92,		 /* 16h ^> 16h */
 	&&put16_12_21,		 /* 16h -> 16s */
 	&&put16_12_29,		 /* 16h ^> 16s */
+	/* 4 byte formats */
 	&&put16_12_0120,	 /* 16h -> 24h */
 	&&put16_12_0920,	 /* 16h ^> 24h */
 	&&put16_12_0210,	 /* 16h -> 24s */
@@ -424,6 +440,10 @@ static void *const put16_labels[4 * 2 * 2 + 4 * 3] = {
 	&&put16_12_9200,	 /* 16h ^> 32h */
 	&&put16_12_0021,	 /* 16h -> 32s */
 	&&put16_12_0029,	 /* 16h ^> 32s */
+	&&put16_12_0120_20,	 /* 16h -> 20h */
+	&&put16_12_0920_20,	 /* 16h ^> 20h */
+	&&put16_12_0210_20,	 /* 16h -> 20s */
+	&&put16_12_0290_20,	 /* 16h ^> 20s */
 	/* 3bytes format */
 	&&put16_12_120,		 /* 16h -> 24h */
 	&&put16_12_920,		 /* 16h ^> 24h */
@@ -456,6 +476,10 @@ put16_12_1200: as_u32(dst) = (uint32_t)sample << 16; goto PUT16_END;
 put16_12_9200: as_u32(dst) = (uint32_t)(sample ^ 0x8000) << 16; goto PUT16_END;
 put16_12_0021: as_u32(dst) = (uint32_t)bswap_16(sample); goto PUT16_END;
 put16_12_0029: as_u32(dst) = (uint32_t)bswap_16(sample) ^ 0x80; goto PUT16_END;
+put16_12_0120_20: as_u32(dst) = sx20((uint32_t)sample << 4); goto PUT16_END;
+put16_12_0920_20: as_u32(dst) = sx20((uint32_t)(sample ^ 0x8000) << 4); goto PUT16_END;
+put16_12_0210_20: as_u32(dst) = bswap_32(sx20((uint32_t)sample << 4)); goto PUT16_END;
+put16_12_0290_20: as_u32(dst) = bswap_32(sx20((uint32_t)(sample ^ 0x8000) << 4)); goto PUT16_END;
 put16_12_120: _put_triple(dst, (uint32_t)sample << 8); goto PUT16_END;
 put16_12_920: _put_triple(dst, (uint32_t)(sample ^ 0x8000) << 8); goto PUT16_END;
 put16_12_021: _put_triple_s(dst, (uint32_t)sample << 8); goto PUT16_END;
@@ -478,7 +502,7 @@ put16_12_029_18: _put_triple_s(dst, (uint32_t)(sample ^ 0x8000) << 2); goto PUT1
 
 #ifdef GET32_LABELS
 /* src_wid src_endswap sign_toggle */
-static void *const get32_labels[4 * 2 * 2 + 4 * 3] = {
+static void *const get32_labels[5 * 2 * 2 + 4 * 3] = {
 	&&get32_1_1000,	 	 /*  8h -> 32h */
 	&&get32_1_9000,	 	 /*  8h ^> 32h */
 	&&get32_1_1000,		 /*  8s -> 32h */
@@ -487,6 +511,7 @@ static void *const get32_labels[4 * 2 * 2 + 4 * 3] = {
 	&&get32_12_9200,	 /* 16h ^> 32h */
 	&&get32_12_2100,	 /* 16s -> 32h */
 	&&get32_12_A100,	 /* 16s ^> 32h */
+	/* 4 byte formats */
 	&&get32_0123_1230,	 /* 24h -> 32h */
 	&&get32_0123_9230,	 /* 24h ^> 32h */
 	&&get32_1230_3210,	 /* 24s -> 32h */
@@ -495,6 +520,10 @@ static void *const get32_labels[4 * 2 * 2 + 4 * 3] = {
 	&&get32_1234_9234,	 /* 32h ^> 32h */
 	&&get32_1234_4321,	 /* 32s -> 32h */
 	&&get32_1234_C321,	 /* 32s ^> 32h */
+	&&get32_0123_1230_20,	 /* 20h -> 32h */
+	&&get32_0123_9230_20,	 /* 20h ^> 32h */
+	&&get32_1230_3210_20,	 /* 20s -> 32h */
+	&&get32_1230_B210_20,	 /* 20s ^> 32h */
 	/* 3bytes format */
 	&&get32_123_1230,	 /* 24h -> 32h */
 	&&get32_123_9230,	 /* 24h ^> 32h */
@@ -531,6 +560,10 @@ get32_1234_1234: sample = as_u32c(src); goto GET32_END;
 get32_1234_9234: sample = as_u32c(src) ^ 0x80000000; goto GET32_END;
 get32_1234_4321: sample = bswap_32(as_u32c(src)); goto GET32_END;
 get32_1234_C321: sample = bswap_32(as_u32c(src) ^ 0x80); goto GET32_END;
+get32_0123_1230_20: sample = as_u32c(src) << 12; goto GET32_END;
+get32_0123_9230_20: sample = (as_u32c(src) << 12) ^ 0x80000000; goto GET32_END;
+get32_1230_3210_20: sample = bswap_32(as_u32c(src)) << 12; goto GET32_END;
+get32_1230_B210_20: sample = (bswap_32(as_u32c(src)) << 12) ^ 0x80000000; goto GET32_END;
 get32_123_1230: sample = _get_triple(src) << 8; goto GET32_END;
 get32_123_9230: sample = (_get_triple(src) << 8) ^ 0x80000000; goto GET32_END;
 get32_123_3210: sample = _get_triple_s(src) << 8; goto GET32_END;
@@ -553,7 +586,7 @@ __conv24_get: goto *put;
 
 #ifdef PUT32_LABELS
 /* dst_wid dst_endswap sign_toggle */
-static void *const put32_labels[4 * 2 * 2 + 4 * 3] = {
+static void *const put32_labels[5 * 2 * 2 + 4 * 3] = {
 	&&put32_1234_1,	 	 /* 32h ->  8h */
 	&&put32_1234_9,	 	 /* 32h ^>  8h */
 	&&put32_1234_1,	 	 /* 32h ->  8s */
@@ -562,6 +595,7 @@ static void *const put32_labels[4 * 2 * 2 + 4 * 3] = {
 	&&put32_1234_92,	 /* 32h ^> 16h */
 	&&put32_1234_21,	 /* 32h -> 16s */
 	&&put32_1234_29,	 /* 32h ^> 16s */
+	/* 4 byte formats */
 	&&put32_1234_0123,	 /* 32h -> 24h */
 	&&put32_1234_0923,	 /* 32h ^> 24h */
 	&&put32_1234_3210,	 /* 32h -> 24s */
@@ -570,6 +604,10 @@ static void *const put32_labels[4 * 2 * 2 + 4 * 3] = {
 	&&put32_1234_9234,	 /* 32h ^> 32h */
 	&&put32_1234_4321,	 /* 32h -> 32s */
 	&&put32_1234_4329,	 /* 32h ^> 32s */
+	&&put32_1234_0123_20,	 /* 32h -> 20h */
+	&&put32_1234_0923_20,	 /* 32h ^> 20h */
+	&&put32_1234_3210_20,	 /* 32h -> 20s */
+	&&put32_1234_3290_20,	 /* 32h ^> 20s */
 	/* 3bytes format */
 	&&put32_1234_123,	 /* 32h -> 24h */
 	&&put32_1234_923,	 /* 32h ^> 24h */
@@ -607,6 +645,10 @@ put32_1234_1234: as_u32(dst) = sample; goto PUT32_END;
 put32_1234_9234: as_u32(dst) = sample ^ 0x80000000; goto PUT32_END;
 put32_1234_4321: as_u32(dst) = bswap_32(sample); goto PUT32_END;
 put32_1234_4329: as_u32(dst) = bswap_32(sample) ^ 0x80; goto PUT32_END;
+put32_1234_0123_20: as_u32(dst) = sx20(sample >> 12); goto PUT32_END;
+put32_1234_0923_20: as_u32(dst) = sx20((sample ^ 0x80000000) >> 12); goto PUT32_END;
+put32_1234_3210_20: as_u32(dst) = bswap_32(sx20(sample >> 12)); goto PUT32_END;
+put32_1234_3290_20: as_u32(dst) = bswap_32(sx20((sample ^ 0x80000000) >> 12)); goto PUT32_END;
 put32_1234_123: _put_triple(dst, sample >> 8); goto PUT32_END;
 put32_1234_923: _put_triple(dst, (sample ^ 0x80000000) >> 8); goto PUT32_END;
 put32_1234_321: _put_triple_s(dst, sample >> 8); goto PUT32_END;

[alsa-lib][PATCH v3 4/4] pcm: plug: add SND_PCM_FORMAT_{S, U}20 to linear_preferred_formats

[Maciej S. Szmigiero]

This commit adds the recently added formats SND_PCM_FORMAT_{S,U}20 to
the linear_preferred_formats array in pcm_plug.
Let's give them lower priority than more standard S24 formats but a higher
priority than less typical 3-byte versions.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
 src/pcm/pcm_plug.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/pcm/pcm_plug.c b/src/pcm/pcm_plug.c
index f1d7792db709..abf6f1ab9751 100644
--- a/src/pcm/pcm_plug.c
+++ b/src/pcm/pcm_plug.c
@@ -138,6 +138,17 @@ static const snd_pcm_format_t linear_preferred_formats[] = {
 	SND_PCM_FORMAT_S24_LE,
 	SND_PCM_FORMAT_U24_LE,
 #endif
+#ifdef SND_LITTLE_ENDIAN
+	SND_PCM_FORMAT_S20_LE,
+	SND_PCM_FORMAT_U20_LE,
+	SND_PCM_FORMAT_S20_BE,
+	SND_PCM_FORMAT_U20_BE,
+#else
+	SND_PCM_FORMAT_S20_BE,
+	SND_PCM_FORMAT_U20_BE,
+	SND_PCM_FORMAT_S20_LE,
+	SND_PCM_FORMAT_U20_LE,
+#endif
 #ifdef SND_LITTLE_ENDIAN
 	SND_PCM_FORMAT_S24_3LE,
 	SND_PCM_FORMAT_U24_3LE,