From 25164969932590894671895944f30743d344e541 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Thu, 1 Mar 2012 00:25:08 +0100
Subject: audio_format: add DSD sample format
Basic support for Direct Stream Digital. No conversion yet, and no
decoder/output plugin support.
---
src/audio_format.c | 6 ++++++
src/audio_format.h | 19 +++++++++++++++++++
src/audio_parser.c | 12 ++++++++++++
src/decoder/flac_pcm.c | 2 ++
src/output/alsa_output_plugin.c | 2 ++
src/output/oss_output_plugin.c | 2 ++
src/pcm_byteswap.c | 2 ++
src/pcm_convert.c | 2 ++
src/pcm_format.c | 8 ++++++++
src/pcm_mix.c | 4 ++++
src/pcm_volume.c | 2 ++
11 files changed, 61 insertions(+)
diff --git a/src/audio_format.c b/src/audio_format.c
index 8c40457ec..c9ee27fa1 100644
--- a/src/audio_format.c
+++ b/src/audio_format.c
@@ -71,6 +71,12 @@ sample_format_to_string(enum sample_format format)
case SAMPLE_FORMAT_FLOAT:
return "f";
+
+ case SAMPLE_FORMAT_DSD:
+ return "dsd";
+
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
+ return "dsdl";
}
/* unreachable */
diff --git a/src/audio_format.h b/src/audio_format.h
index 4f7dbfb1a..2c86b70b9 100644
--- a/src/audio_format.h
+++ b/src/audio_format.h
@@ -49,6 +49,18 @@ enum sample_format {
* range is -1.0f to +1.0f.
*/
SAMPLE_FORMAT_FLOAT,
+
+ /**
+ * Direct Stream Digital. 1-bit samples; each frame has one
+ * byte (8 samples) per channel.
+ */
+ SAMPLE_FORMAT_DSD,
+
+ /**
+ * Same as #SAMPLE_FORMAT_DSD, but the least significant bit
+ * comes first.
+ */
+ SAMPLE_FORMAT_DSD_LSBFIRST,
};
static const unsigned MAX_CHANNELS = 8;
@@ -175,6 +187,8 @@ audio_valid_sample_format(enum sample_format format)
case SAMPLE_FORMAT_S24_P32:
case SAMPLE_FORMAT_S32:
case SAMPLE_FORMAT_FLOAT:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
return true;
case SAMPLE_FORMAT_UNDEFINED:
@@ -251,6 +265,11 @@ sample_format_size(enum sample_format format)
case SAMPLE_FORMAT_FLOAT:
return 4;
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
+ /* each frame has 8 samples per channel */
+ return 1;
+
case SAMPLE_FORMAT_UNDEFINED:
return 0;
}
diff --git a/src/audio_parser.c b/src/audio_parser.c
index 8875239e1..7061e0e00 100644
--- a/src/audio_parser.c
+++ b/src/audio_parser.c
@@ -87,6 +87,18 @@ parse_sample_format(const char *src, bool mask,
return true;
}
+ if (memcmp(src, "dsd", 3) == 0) {
+ if (src[3] == 'l') {
+ *sample_format_r = SAMPLE_FORMAT_DSD_LSBFIRST;
+ *endptr_r = src + 4;
+ } else {
+ *sample_format_r = SAMPLE_FORMAT_DSD;
+ *endptr_r = src + 3;
+ }
+
+ return true;
+ }
+
value = strtoul(src, &endptr, 10);
if (endptr == src) {
g_set_error(error_r, audio_parser_quark(), 0,
diff --git a/src/decoder/flac_pcm.c b/src/decoder/flac_pcm.c
index c479ebfd4..4d35b118e 100644
--- a/src/decoder/flac_pcm.c
+++ b/src/decoder/flac_pcm.c
@@ -103,6 +103,8 @@ flac_convert(void *dest,
case SAMPLE_FORMAT_S24:
case SAMPLE_FORMAT_FLOAT:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
case SAMPLE_FORMAT_UNDEFINED:
/* unreachable */
assert(false);
diff --git a/src/output/alsa_output_plugin.c b/src/output/alsa_output_plugin.c
index f939ba5b4..58f73d67d 100644
--- a/src/output/alsa_output_plugin.c
+++ b/src/output/alsa_output_plugin.c
@@ -194,6 +194,8 @@ get_bitformat(enum sample_format sample_format)
{
switch (sample_format) {
case SAMPLE_FORMAT_UNDEFINED:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
return SND_PCM_FORMAT_UNKNOWN;
case SAMPLE_FORMAT_S8:
diff --git a/src/output/oss_output_plugin.c b/src/output/oss_output_plugin.c
index 46505873b..b2b491c9c 100644
--- a/src/output/oss_output_plugin.c
+++ b/src/output/oss_output_plugin.c
@@ -396,6 +396,8 @@ sample_format_to_oss(enum sample_format format)
switch (format) {
case SAMPLE_FORMAT_UNDEFINED:
case SAMPLE_FORMAT_FLOAT:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
return AFMT_QUERY;
case SAMPLE_FORMAT_S8:
diff --git a/src/pcm_byteswap.c b/src/pcm_byteswap.c
index a1315c475..741c6510f 100644
--- a/src/pcm_byteswap.c
+++ b/src/pcm_byteswap.c
@@ -74,6 +74,8 @@ pcm_byteswap(struct pcm_buffer *buffer, enum sample_format format,
return NULL;
case SAMPLE_FORMAT_S8:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
return src;
case SAMPLE_FORMAT_S16:
diff --git a/src/pcm_convert.c b/src/pcm_convert.c
index a3b3bb446..0c4e19b9c 100644
--- a/src/pcm_convert.c
+++ b/src/pcm_convert.c
@@ -77,6 +77,8 @@ pcm_convert_channels(struct pcm_buffer *buffer, enum sample_format format,
case SAMPLE_FORMAT_S8:
case SAMPLE_FORMAT_S24:
case SAMPLE_FORMAT_FLOAT:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
g_set_error(error_r, pcm_convert_quark(), 0,
"Channel conversion not implemented for format '%s'",
sample_format_to_string(format));
diff --git a/src/pcm_format.c b/src/pcm_format.c
index a20d8bb8d..c7cf910ed 100644
--- a/src/pcm_format.c
+++ b/src/pcm_format.c
@@ -147,6 +147,8 @@ pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
break;
case SAMPLE_FORMAT_S8:
@@ -265,6 +267,8 @@ pcm_convert_to_24(struct pcm_buffer *buffer,
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
break;
case SAMPLE_FORMAT_S8:
@@ -389,6 +393,8 @@ pcm_convert_to_32(struct pcm_buffer *buffer,
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
break;
case SAMPLE_FORMAT_S8:
@@ -524,6 +530,8 @@ pcm_convert_to_float(struct pcm_buffer *buffer,
{
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
break;
case SAMPLE_FORMAT_S8:
diff --git a/src/pcm_mix.c b/src/pcm_mix.c
index 9f76d568f..84bb5526d 100644
--- a/src/pcm_mix.c
+++ b/src/pcm_mix.c
@@ -120,6 +120,8 @@ pcm_add_vol(void *buffer1, const void *buffer2, size_t size,
switch (format) {
case SAMPLE_FORMAT_UNDEFINED:
case SAMPLE_FORMAT_S24:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
/* not implemented */
return false;
@@ -229,6 +231,8 @@ pcm_add(void *buffer1, const void *buffer2, size_t size,
switch (format) {
case SAMPLE_FORMAT_UNDEFINED:
case SAMPLE_FORMAT_S24:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
/* not implemented */
return false;
diff --git a/src/pcm_volume.c b/src/pcm_volume.c
index de4bda6c9..d8da570aa 100644
--- a/src/pcm_volume.c
+++ b/src/pcm_volume.c
@@ -159,6 +159,8 @@ pcm_volume(void *buffer, size_t length,
switch (format) {
case SAMPLE_FORMAT_UNDEFINED:
case SAMPLE_FORMAT_S24:
+ case SAMPLE_FORMAT_DSD:
+ case SAMPLE_FORMAT_DSD_LSBFIRST:
/* not implemented */
return false;
--
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