This adds support for reading DSDIFF files containing uncompressed
DSD data. 1-bit samples are unpacked to sox_sample_t values of
maximum amplitude. Optional file elements are ignored.
---
msvc10/LibSoX.vcxproj | 1 +
msvc10/LibSoX.vcxproj.filters | 3 +
soxformat.7 | 5 +
src/Makefile.am | 3 +-
src/dsdiff.c | 209 ++++++++++++++++++++++++++++++++++++++++++
src/formats.h | 1 +
6 files changed, 221 insertions(+), 1 deletion(-)
create mode 100644 src/dsdiff.c
diff --git a/msvc10/LibSoX.vcxproj b/msvc10/LibSoX.vcxproj
index e257831..c38a764 100644
--- a/msvc10/LibSoX.vcxproj
+++ b/msvc10/LibSoX.vcxproj
@@ -144,6 +144,7 @@
<ExcludedFromBuild
Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
<ExcludedFromBuild
Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
</ClCompile>
+ <ClCompile Include="..\src\dsdiff.c" />
<ClCompile Include="..\src\dsf.c" />
<ClCompile Include="..\src\example0.c">
<ExcludedFromBuild
Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
diff --git a/msvc10/LibSoX.vcxproj.filters b/msvc10/LibSoX.vcxproj.filters
index 6cc951c..bed7cb2 100644
--- a/msvc10/LibSoX.vcxproj.filters
+++ b/msvc10/LibSoX.vcxproj.filters
@@ -597,6 +597,9 @@
<ClCompile Include="..\src\downsample.c">
<Filter>Effect Sources</Filter>
</ClCompile>
+ <ClCompile Include="..\src\dsdiff.c">
+ <Filter>Format Sources</Filter>
+ </ClCompile>
<ClCompile Include="..\src\dsf.c">
<Filter>Format Sources</Filter>
</ClCompile>
diff --git a/soxformat.7 b/soxformat.7
index 685b27e..645910e 100644
--- a/soxformat.7
+++ b/soxformat.7
@@ -304,6 +304,11 @@ Example containing only 2 stereo samples of silence:
0.00012481278 0 0
.EE
.TP
+.B .dff
+Direct Stream Digital Interchange File Format (DSDIFF). Format defined
+by Philips for storing 1-bit DSD data. Used in SACD mastering and
+occasionally for online distribution.
+.TP
.B .dsf
DSD Stream File. Format defined by Sony for storing 1-bit DSD data.
Commonly used for online distribution of audiophile recordings.
diff --git a/src/Makefile.am b/src/Makefile.am
index 462d46d..e047580 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -121,7 +121,8 @@ libsox_la_SOURCES += raw-fmt.c s1-fmt.c s2-fmt.c s3-fmt.c \
lu-fmt.c 8svx.c aiff-fmt.c aifc-fmt.c au.c avr.c cdr.c cvsd-fmt.c \
dvms-fmt.c dat.c hcom.c htk.c maud.c prc.c sf.c smp.c \
sounder.c soundtool.c sphere.c tx16w.c voc.c vox-fmt.c ima-fmt.c adpcm.c
adpcm.h \
- ima_rw.c ima_rw.h wav.c wve.c xa.c nulfile.c f4-fmt.c f8-fmt.c gsrt.c dsf.c
+ ima_rw.c ima_rw.h wav.c wve.c xa.c nulfile.c f4-fmt.c f8-fmt.c gsrt.c dsf.c \
+ dsdiff.c
libsox_la_LIBADD += @GSM_LIBS@ @LIBGSM_LIBADD@
libsox_la_LIBADD += @LPC10_LIBS@ @LIBLPC10_LIBADD@
diff --git a/src/dsdiff.c b/src/dsdiff.c
new file mode 100644
index 0000000..8d3ccc3
--- /dev/null
+++ b/src/dsdiff.c
@@ -0,0 +1,209 @@
+/* DSDIFF file support
+ *
+ * Copyright (c) 2015 Mans Rullgard <m...@mansr.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* File format specification available at
+ * http://dsd-guide.com/sites/default/files/white-papers/DSDIFF_1.5_Spec.pdf
+ */
+
+#include <stdint.h>
+#include "sox_i.h"
+
+struct dsdiff {
+ uint32_t sample_rate;
+ uint16_t num_channels;
+ uint64_t data_size;
+ uint8_t *buf;
+};
+
+#define ID(a, b, c, d) ((a) << 24 | (b) << 16 | (c) << 8 | (d))
+
+static int dff_startread(sox_format_t *ft)
+{
+ struct dsdiff *dff = ft->priv;
+ uint32_t ckid;
+ uint32_t cktype;
+ uint64_t cksize;
+ uint64_t f8size;
+ uint32_t fver;
+ uint64_t spos, epos;
+
+ if (lsx_readdw(ft, &ckid) || ckid != ID('F', 'R', 'M', '8')) {
+ lsx_fail_errno(ft, SOX_EHDR, "FRM8 tag not found");
+ return SOX_EHDR;
+ }
+
+ if (lsx_readqw(ft, &f8size)) {
+ lsx_fail_errno(ft, SOX_EHDR, "error reading chunk size");
+ return SOX_EHDR;
+ }
+
+ if (lsx_readdw(ft, &cktype) || cktype != ID('D', 'S', 'D', ' ')) {
+ lsx_fail_errno(ft, SOX_EHDR, "DSD tag not found");
+ return SOX_EHDR;
+ }
+
+ do {
+ if (lsx_readdw(ft, &ckid) || lsx_readqw(ft, &cksize)) {
+ lsx_fail_errno(ft, SOX_EHDR, "read error");
+ return SOX_EHDR;
+ }
+
+ spos = lsx_tell(ft);
+
+ switch (ckid) {
+ case ID('F', 'V', 'E', 'R'):
+ if (cksize != 4)
+ return SOX_EHDR;
+ if (lsx_readdw(ft, &fver))
+ return SOX_EHDR;
+ if (fver >> 24 != 1) {
+ lsx_fail_errno(ft, SOX_EHDR, "unknown version");
+ return SOX_EHDR;
+ }
+ break;
+
+ case ID('P', 'R', 'O', 'P'):
+ if (cksize < 4)
+ return SOX_EHDR;
+ if (lsx_readdw(ft, &cktype))
+ return SOX_EHDR;
+ if (cktype == ID('S', 'N', 'D', ' '))
+ cksize = 4;
+ break;
+
+ case ID('F', 'S', ' ', ' '):
+ if (cksize < 4)
+ return SOX_EHDR;
+ if (lsx_readdw(ft, &dff->sample_rate))
+ return SOX_EHDR;
+ break;
+
+ case ID('C', 'H', 'N', 'L'):
+ if (cksize < 4)
+ return SOX_EHDR;
+ if (lsx_readw(ft, &dff->num_channels))
+ return SOX_EHDR;
+ break;
+
+ case ID('C', 'M', 'P', 'R'):
+ if (cksize < 4)
+ return SOX_EHDR;
+ if (lsx_readdw(ft, &cktype))
+ return SOX_EHDR;
+ if (cktype != ID('D', 'S', 'D', ' ')) {
+ lsx_fail_errno(ft, SOX_EHDR,
+ "unsupported compression");
+ return SOX_EHDR;
+ }
+ break;
+
+ case ID('D', 'S', 'D', ' '):
+ if (cksize < 8)
+ return SOX_EHDR;
+ dff->data_size = cksize;
+ cksize = 0;
+ break;
+ }
+
+ cksize += cksize & 1;
+ epos = lsx_tell(ft);
+ if (epos != spos + cksize)
+ lsx_seeki(ft, (off_t)(spos + cksize - epos), SEEK_CUR);
+ } while (cksize && epos < f8size);
+
+ if (!dff->sample_rate || !dff->num_channels || !dff->data_size) {
+ lsx_fail_errno(ft, SOX_EHDR, "invalid file header");
+ return SOX_EHDR;
+ }
+
+ if (ckid != ID('D', 'S', 'D', ' ')) {
+ lsx_fail_errno(ft, SOX_EHDR, "unsupported data type");
+ return SOX_EHDR;
+ }
+
+ dff->buf = lsx_malloc((size_t)dff->num_channels);
+ if (!dff->buf)
+ return SOX_ENOMEM;
+
+ ft->signal.rate = dff->sample_rate;
+ ft->signal.channels = dff->num_channels;
+ ft->signal.precision = 1;
+ ft->signal.length = dff->data_size * 8;
+
+ ft->encoding.encoding = SOX_ENCODING_DSD;
+ ft->encoding.bits_per_sample = 1;
+
+ return SOX_SUCCESS;
+}
+
+static size_t dff_read(sox_format_t *ft, sox_sample_t *buf, size_t len)
+{
+ struct dsdiff *dff = ft->priv;
+ size_t nc = dff->num_channels;
+ size_t rsamp = 0;
+ unsigned i, j;
+
+ len /= nc;
+
+ while (len >= 8) {
+ if (lsx_read_b_buf(ft, dff->buf, nc) < nc)
+ return rsamp * nc;
+
+ for (i = 0; i < nc; i++) {
+ unsigned d = dff->buf[i];
+
+ for (j = 0; j < 8; j++) {
+ buf[i + j * nc] = d & 128 ?
+ SOX_SAMPLE_MAX : -SOX_SAMPLE_MAX;
+ d <<= 1;
+ }
+ }
+
+ buf += 8 * nc;
+ rsamp += 8;
+ len -= 8;
+ }
+
+ return rsamp * nc;
+}
+
+static int dff_stopread(sox_format_t *ft)
+{
+ struct dsdiff *dff = ft->priv;
+
+ free(dff->buf);
+
+ return SOX_SUCCESS;
+}
+
+LSX_FORMAT_HANDLER(dsdiff)
+{
+ static char const * const names[] = { "dff", NULL };
+ static unsigned const write_encodings[] = { 0 };
+ static sox_format_handler_t const handler = {
+ SOX_LIB_VERSION_CODE,
+ "Direct Stream Digital Interchange File Format (DSDIFF)",
+ names, SOX_FILE_BIG_END,
+ dff_startread, dff_read, dff_stopread,
+ NULL, NULL, NULL,
+ NULL, write_encodings, NULL,
+ sizeof(struct dsdiff)
+ };
+ return &handler;
+}
diff --git a/src/formats.h b/src/formats.h
index 4701efd..eb33577 100644
--- a/src/formats.h
+++ b/src/formats.h
@@ -26,6 +26,7 @@
FORMAT(cvsd)
FORMAT(cvu)
FORMAT(dat)
+ FORMAT(dsdiff)
FORMAT(dsf)
FORMAT(dvms)
FORMAT(f4)
--
2.5.2
------------------------------------------------------------------------------
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