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-rw-r--r--src/pcm/PcmDsdUsb.cxx22
-rw-r--r--src/pcm/PcmDsdUsb.hxx6
-rw-r--r--src/pcm/PcmExport.cxx6
3 files changed, 16 insertions, 18 deletions
diff --git a/src/pcm/PcmDsdUsb.cxx b/src/pcm/PcmDsdUsb.cxx
index a42b03e64..9b854ad07 100644
--- a/src/pcm/PcmDsdUsb.cxx
+++ b/src/pcm/PcmDsdUsb.cxx
@@ -21,6 +21,7 @@
#include "PcmDsdUsb.hxx"
#include "PcmBuffer.hxx"
#include "AudioFormat.hxx"
+#include "util/ConstBuffer.hxx"
#include <assert.h>
@@ -38,18 +39,16 @@ pcm_two_dsd_to_usb_marker2(uint8_t a, uint8_t b)
return 0xfffa0000 | (a << 8) | b;
}
-
-const uint32_t *
+ConstBuffer<uint32_t>
pcm_dsd_to_usb(PcmBuffer &buffer, unsigned channels,
- const uint8_t *src, size_t src_size,
- size_t *dest_size_r)
+ ConstBuffer<uint8_t> _src)
{
assert(audio_valid_channel_count(channels));
- assert(src != nullptr);
- assert(src_size > 0);
- assert(src_size % channels == 0);
+ assert(!_src.IsNull());
+ assert(_src.size > 0);
+ assert(_src.size % channels == 0);
- const unsigned num_src_samples = src_size;
+ const unsigned num_src_samples = _src.size;
const unsigned num_src_frames = num_src_samples / channels;
/* this rounds down and discards the last odd frame; not
@@ -57,11 +56,10 @@ pcm_dsd_to_usb(PcmBuffer &buffer, unsigned channels,
const unsigned num_frames = num_src_frames / 2;
const unsigned num_samples = num_frames * channels;
- const size_t dest_size = num_samples * 4;
- *dest_size_r = dest_size;
- uint32_t *const dest0 = (uint32_t *)buffer.Get(dest_size),
+ uint32_t *const dest0 = (uint32_t *)buffer.GetT<uint32_t>(num_samples),
*dest = dest0;
+ auto src = _src.data;
for (unsigned i = num_frames / 2; i > 0; --i) {
for (unsigned c = channels; c > 0; --c) {
/* each 24 bit sample has 16 DSD sample bits
@@ -94,5 +92,5 @@ pcm_dsd_to_usb(PcmBuffer &buffer, unsigned channels,
src += channels;
}
- return dest0;
+ return { dest0, num_samples };
}
diff --git a/src/pcm/PcmDsdUsb.hxx b/src/pcm/PcmDsdUsb.hxx
index bb31d2d45..5e05c009b 100644
--- a/src/pcm/PcmDsdUsb.hxx
+++ b/src/pcm/PcmDsdUsb.hxx
@@ -26,6 +26,7 @@
#include <stddef.h>
class PcmBuffer;
+template<typename T> struct ConstBuffer;
/**
* Pack DSD 1 bit samples into (padded) 24 bit PCM samples for
@@ -33,9 +34,8 @@ class PcmBuffer;
* dCS and others:
* http://www.sonore.us/DoP_openStandard_1v1.pdf
*/
-const uint32_t *
+ConstBuffer<uint32_t>
pcm_dsd_to_usb(PcmBuffer &buffer, unsigned channels,
- const uint8_t *src, size_t src_size,
- size_t *dest_size_r);
+ ConstBuffer<uint8_t> src);
#endif
diff --git a/src/pcm/PcmExport.cxx b/src/pcm/PcmExport.cxx
index e04a7fdd9..26644a71a 100644
--- a/src/pcm/PcmExport.cxx
+++ b/src/pcm/PcmExport.cxx
@@ -76,9 +76,9 @@ ConstBuffer<void>
PcmExport::Export(ConstBuffer<void> data)
{
if (dsd_usb)
- data.data = pcm_dsd_to_usb(dsd_buffer, channels,
- (const uint8_t *)data.data,
- data.size, &data.size);
+ data = pcm_dsd_to_usb(dsd_buffer, channels,
+ ConstBuffer<uint8_t>::FromVoid(data))
+ .ToVoid();
if (pack24) {
const auto src = ConstBuffer<int32_t>::FromVoid(data);