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authorJurgen Kramer <gtmkramer@xs4all.nl>2012-06-16 13:46:42 +0200
committerMax Kellermann <max@duempel.org>2012-06-27 09:54:24 +0200
commit7235dbadfd113bc3f851dc4f58b74d01d9910af5 (patch)
tree92ea99f8248f23068d60618f74ab1612ec278202 /src/decoder/dsdiff_decoder_plugin.c
parentecec41025f35ea8957dd3b59caeb3f4dfee37821 (diff)
downloadmpd-7235dbadfd113bc3f851dc4f58b74d01d9910af5.tar.gz
mpd-7235dbadfd113bc3f851dc4f58b74d01d9910af5.tar.xz
mpd-7235dbadfd113bc3f851dc4f58b74d01d9910af5.zip
patch to split DSD decoder into separate decoders for DSF en DFF. Move common
functions to new dsdlib. Update user doc.
Diffstat (limited to '')
-rw-r--r--src/decoder/dsdiff_decoder_plugin.c379
1 files changed, 57 insertions, 322 deletions
diff --git a/src/decoder/dsdiff_decoder_plugin.c b/src/decoder/dsdiff_decoder_plugin.c
index a7aa6017c..2c9ff3833 100644
--- a/src/decoder/dsdiff_decoder_plugin.c
+++ b/src/decoder/dsdiff_decoder_plugin.c
@@ -19,12 +19,11 @@
/* \file
*
- * This plugin decodes DSDIFF data (SACD) embedded in DFF and DSF files.
+ * This plugin decodes DSDIFF data (SACD) embedded in DFF files.
* The DFF code was modeled after the specification found here:
* http://www.sonicstudio.com/pdf/dsd/DSDIFF_1.5_Spec.pdf
*
- * The DSF code was created using the specification found here:
- * http://dsd-guide.com/sonys-dsf-file-format-spec
+ * All functions common to both DSD decoders have been moved to dsdlib
*/
#include "config.h"
@@ -32,6 +31,8 @@
#include "decoder_api.h"
#include "audio_check.h"
#include "util/bit_reverse.h"
+#include "tag_handler.h"
+#include "dsdlib.h"
#include <unistd.h>
#include <stdio.h> /* for SEEK_SET, SEEK_CUR */
@@ -39,74 +40,25 @@
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "dsdiff"
-struct dsdiff_id {
- char value[4];
-};
-
struct dsdiff_header {
- struct dsdiff_id id;
+ struct dsdlib_id id;
uint32_t size_high, size_low;
- struct dsdiff_id format;
+ struct dsdlib_id format;
};
struct dsdiff_chunk_header {
- struct dsdiff_id id;
+ struct dsdlib_id id;
uint32_t size_high, size_low;
};
struct dsdiff_metadata {
unsigned sample_rate, channels;
- bool fileisdff;
bool bitreverse;
uint64_t chunk_size;
};
static bool lsbitfirst;
-
-struct dsf_header {
- /** DSF header id: "DSD " */
- struct dsdiff_id id;
- /** DSD chunk size, including id = 28 */
- uint32_t size_low, size_high;
- /** Total file size */
- uint32_t fsize_low, fsize_high;
- /** Pointer to id3v2 metadata, should be at the end of the file */
- uint32_t pmeta_low, pmeta_high;
-};
-/** DSF file fmt chunk */
-struct dsf_fmt_chunk {
-
- /** id: "fmt " */
- struct dsdiff_id id;
- /** fmt chunk size, including id, normally 52 */
- uint32_t size_low, size_high;
- /** Version of this format = 1 */
- uint32_t version;
- /** 0: DSD raw */
- uint32_t formatid;
- /** Channel Type, 1 = mono, 2 = stereo, 3 = 3 channels, etc */
- uint32_t channeltype;
- /** Channel number, 1 = mono, 2 = stereo, ... 6 = 6 channels */
- uint32_t channelnum;
- /** Sample frequency: 2822400, 5644800 */
- uint32_t sample_freq;
- /** Bits per sample 1 or 8 */
- uint32_t bitssample;
- /** Sample count per channel in bytes */
- uint32_t scnt_low, scnt_high;
- /** Block size per channel = 4096 */
- uint32_t block_size;
- /** Reserved, should be all zero */
- uint32_t reserved;
-};
-
-struct dsf_data_chunk {
- struct dsdiff_id id;
- /** "data" chunk size, includes header (id+size) */
- uint32_t size_low, size_high;
-};
-
static bool
dsdiff_init(const struct config_param *param)
{
@@ -114,16 +66,6 @@ dsdiff_init(const struct config_param *param)
return true;
}
-static bool
-dsdiff_id_equals(const struct dsdiff_id *id, const char *s)
-{
- assert(id != NULL);
- assert(s != NULL);
- assert(strlen(s) == sizeof(id->value));
-
- return memcmp(id->value, s, sizeof(id->value)) == 0;
-}
-
/**
* Read the "size" attribute from the specified header, converting it
* to the host byte order if needed.
@@ -137,25 +79,17 @@ dsdiff_chunk_size(const struct dsdiff_chunk_header *header)
}
static bool
-dsdiff_read(struct decoder *decoder, struct input_stream *is,
- void *data, size_t length)
-{
- size_t nbytes = decoder_read(decoder, is, data, length);
- return nbytes == length;
-}
-
-static bool
dsdiff_read_id(struct decoder *decoder, struct input_stream *is,
- struct dsdiff_id *id)
+ struct dsdlib_id *id)
{
- return dsdiff_read(decoder, is, id, sizeof(*id));
+ return dsdlib_read(decoder, is, id, sizeof(*id));
}
static bool
dsdiff_read_chunk_header(struct decoder *decoder, struct input_stream *is,
struct dsdiff_chunk_header *header)
{
- return dsdiff_read(decoder, is, header, sizeof(*header));
+ return dsdlib_read(decoder, is, header, sizeof(*header));
}
static bool
@@ -172,65 +106,6 @@ dsdiff_read_payload(struct decoder *decoder, struct input_stream *is,
}
/**
- * Skip the #input_stream to the specified offset.
- */
-static bool
-dsdiff_skip_to(struct decoder *decoder, struct input_stream *is,
- goffset offset)
-{
- if (is->seekable)
- return input_stream_seek(is, offset, SEEK_SET, NULL);
-
- if (is->offset > offset)
- return false;
-
- char buffer[8192];
- while (is->offset < offset) {
- size_t length = sizeof(buffer);
- if (offset - is->offset < (goffset)length)
- length = offset - is->offset;
-
- size_t nbytes = decoder_read(decoder, is, buffer, length);
- if (nbytes == 0)
- return false;
- }
-
- assert(is->offset == offset);
- return true;
-}
-
-/**
- * Skip some bytes from the #input_stream.
- */
-static bool
-dsdiff_skip(struct decoder *decoder, struct input_stream *is,
- goffset delta)
-{
- assert(delta >= 0);
-
- if (delta == 0)
- return true;
-
- if (is->seekable)
- return input_stream_seek(is, delta, SEEK_CUR, NULL);
-
- char buffer[8192];
- while (delta > 0) {
- size_t length = sizeof(buffer);
- if ((goffset)length > delta)
- length = delta;
-
- size_t nbytes = decoder_read(decoder, is, buffer, length);
- if (nbytes == 0)
- return false;
-
- delta -= nbytes;
- }
-
- return true;
-}
-
-/**
* Read and parse a "SND" chunk inside "PROP".
*/
static bool
@@ -248,7 +123,7 @@ dsdiff_read_prop_snd(struct decoder *decoder, struct input_stream *is,
if (chunk_end_offset > end_offset)
return false;
- if (dsdiff_id_equals(&header.id, "FS ")) {
+ if (dsdlib_id_equals(&header.id, "FS ")) {
uint32_t sample_rate;
if (!dsdiff_read_payload(decoder, is, &header,
&sample_rate,
@@ -256,31 +131,31 @@ dsdiff_read_prop_snd(struct decoder *decoder, struct input_stream *is,
return false;
metadata->sample_rate = GUINT32_FROM_BE(sample_rate);
- } else if (dsdiff_id_equals(&header.id, "CHNL")) {
+ } else if (dsdlib_id_equals(&header.id, "CHNL")) {
uint16_t channels;
if (dsdiff_chunk_size(&header) < sizeof(channels) ||
- !dsdiff_read(decoder, is,
+ !dsdlib_read(decoder, is,
&channels, sizeof(channels)) ||
- !dsdiff_skip_to(decoder, is, chunk_end_offset))
+ !dsdlib_skip_to(decoder, is, chunk_end_offset))
return false;
metadata->channels = GUINT16_FROM_BE(channels);
- } else if (dsdiff_id_equals(&header.id, "CMPR")) {
- struct dsdiff_id type;
+ } else if (dsdlib_id_equals(&header.id, "CMPR")) {
+ struct dsdlib_id type;
if (dsdiff_chunk_size(&header) < sizeof(type) ||
- !dsdiff_read(decoder, is,
+ !dsdlib_read(decoder, is,
&type, sizeof(type)) ||
- !dsdiff_skip_to(decoder, is, chunk_end_offset))
+ !dsdlib_skip_to(decoder, is, chunk_end_offset))
return false;
- if (!dsdiff_id_equals(&type, "DSD "))
+ if (!dsdlib_id_equals(&type, "DSD "))
/* only uncompressed DSD audio data
is implemented */
return false;
} else {
/* ignore unknown chunk */
- if (!dsdiff_skip_to(decoder, is, chunk_end_offset))
+ if (!dsdlib_skip_to(decoder, is, chunk_end_offset))
return false;
}
}
@@ -299,16 +174,16 @@ dsdiff_read_prop(struct decoder *decoder, struct input_stream *is,
uint64_t prop_size = dsdiff_chunk_size(prop_header);
goffset end_offset = is->offset + prop_size;
- struct dsdiff_id prop_id;
+ struct dsdlib_id prop_id;
if (prop_size < sizeof(prop_id) ||
!dsdiff_read_id(decoder, is, &prop_id))
return false;
- if (dsdiff_id_equals(&prop_id, "SND "))
+ if (dsdlib_id_equals(&prop_id, "SND "))
return dsdiff_read_prop_snd(decoder, is, metadata, end_offset);
else
/* ignore unknown PROP chunk */
- return dsdiff_skip_to(decoder, is, end_offset);
+ return dsdlib_skip_to(decoder, is, end_offset);
}
/**
@@ -322,9 +197,9 @@ dsdiff_read_metadata(struct decoder *decoder, struct input_stream *is,
struct dsdiff_chunk_header *chunk_header)
{
struct dsdiff_header header;
- if (!dsdiff_read(decoder, is, &header, sizeof(header)) ||
- !dsdiff_id_equals(&header.id, "FRM8") ||
- !dsdiff_id_equals(&header.format, "DSD "))
+ if (!dsdlib_read(decoder, is, &header, sizeof(header)) ||
+ !dsdlib_id_equals(&header.id, "FRM8") ||
+ !dsdlib_id_equals(&header.format, "DSD "))
return false;
while (true) {
@@ -332,13 +207,14 @@ dsdiff_read_metadata(struct decoder *decoder, struct input_stream *is,
chunk_header))
return false;
- if (dsdiff_id_equals(&chunk_header->id, "PROP")) {
+ if (dsdlib_id_equals(&chunk_header->id, "PROP")) {
if (!dsdiff_read_prop(decoder, is, metadata,
chunk_header))
return false;
- } else if (dsdiff_id_equals(&chunk_header->id, "DSD ")) {
- /* done with metadata, mark as DFF */
- metadata->fileisdff = true;
+ } else if (dsdlib_id_equals(&chunk_header->id, "DSD ")) {
+ uint64_t chunk_size;
+ chunk_size = dsdiff_chunk_size(chunk_header);
+ metadata->chunk_size = chunk_size;
return true;
} else {
/* ignore unknown chunk */
@@ -346,89 +222,12 @@ dsdiff_read_metadata(struct decoder *decoder, struct input_stream *is,
chunk_size = dsdiff_chunk_size(chunk_header);
goffset chunk_end_offset = is->offset + chunk_size;
- if (!dsdiff_skip_to(decoder, is,
- chunk_end_offset))
+ if (!dsdlib_skip_to(decoder, is, chunk_end_offset))
return false;
}
}
}
-/**
- * Read and parse all needed metadata chunks for DSF files.
- */
-static bool
-dsf_read_metadata(struct decoder *decoder, struct input_stream *is,
- struct dsdiff_metadata *metadata)
-{
- /* Reset to beginning of the stream */
- if (!dsdiff_skip_to(decoder, is, 0))
- return false;
-
- uint64_t chunk_size;
- struct dsf_header dsf_header;
- if (!dsdiff_read(decoder, is, &dsf_header, sizeof(dsf_header)) ||
- !dsdiff_id_equals(&dsf_header.id, "DSD "))
- return false;
-
- chunk_size = (((uint64_t)GUINT32_FROM_LE(dsf_header.size_high)) << 32) |
- ((uint64_t)GUINT32_FROM_LE(dsf_header.size_low));
-
- if (sizeof(dsf_header) != chunk_size)
- return false;
-
- /* Read the 'fmt ' chunk of the DSF file */
- struct dsf_fmt_chunk dsf_fmt_chunk;
- if (!dsdiff_read(decoder, is, &dsf_fmt_chunk, sizeof(dsf_fmt_chunk)) ||
- !dsdiff_id_equals(&dsf_fmt_chunk.id, "fmt "))
- return false;
-
- uint64_t fmt_chunk_size;
- fmt_chunk_size = (((uint64_t)GUINT32_FROM_LE(dsf_fmt_chunk.size_high)) << 32) |
- ((uint64_t)GUINT32_FROM_LE(dsf_fmt_chunk.size_low));
-
- if (fmt_chunk_size != sizeof(dsf_fmt_chunk))
- return false;
-
- uint32_t samplefreq = (uint32_t)GUINT32_FROM_LE(dsf_fmt_chunk.sample_freq);
-
- /* For now, only support version 1 of the standard, DSD raw stereo
- files with a sample freq of 2822400 Hz */
-
- if (dsf_fmt_chunk.version != 1 || dsf_fmt_chunk.formatid != 0
- || dsf_fmt_chunk.channeltype != 2
- || dsf_fmt_chunk.channelnum != 2
- || samplefreq != 2822400)
- return false;
-
- uint32_t chblksize = (uint32_t)GUINT32_FROM_LE(dsf_fmt_chunk.block_size);
- /* According to the spec block size should always be 4096 */
- if (chblksize != 4096)
- return false;
-
- /* Read the 'data' chunk of the DSF file */
- struct dsf_data_chunk data_chunk;
- if (!dsdiff_read(decoder, is, &data_chunk, sizeof(data_chunk)) ||
- !dsdiff_id_equals(&data_chunk.id, "data"))
- return false;
-
- /* Data size of DSF files are padded to multiple of 4096,
- we use the actual data size as chunk size */
-
- uint64_t data_size;
- data_size = (((uint64_t)GUINT32_FROM_LE(data_chunk.size_high)) << 32) |
- ((uint64_t)GUINT32_FROM_LE(data_chunk.size_low));
- data_size -= sizeof(data_chunk);
-
- metadata->chunk_size = data_size;
- metadata->channels = (unsigned) dsf_fmt_chunk.channelnum;
- metadata->sample_rate = samplefreq;
-
- /* Check bits per sample format, determine if bitreverse is needed */
- metadata->bitreverse = dsf_fmt_chunk.bitssample == 1 ? true : false;
- metadata->fileisdff = false;
- return true;
-}
-
static void
bit_reverse_buffer(uint8_t *p, uint8_t *end)
{
@@ -437,46 +236,15 @@ bit_reverse_buffer(uint8_t *p, uint8_t *end)
}
/**
- * DSF data is build up of alternating 4096 blocks of DSD samples for left and
- * right. Convert the buffer holding 1 block of 4096 DSD left samples and 1
- * block of 4096 DSD right samples to 8k of samples in normal PCM left/right
- * order.
- */
-static void
-dsf_to_pcm_order(uint8_t *dest, uint8_t *scratch, size_t nrbytes)
-{
- for (unsigned i = 0, j = 0; i < (unsigned)nrbytes; i += 2) {
- scratch[i] = *(dest+j);
- j++;
- }
-
- for (unsigned i = 1, j = 0; i < (unsigned) nrbytes; i += 2) {
- scratch[i] = *(dest+4096+j);
- j++;
- }
-
- for (unsigned i = 0; i < (unsigned)nrbytes; i++) {
- *dest = scratch[i];
- dest++;
- }
-}
-
-/**
* Decode one "DSD" chunk.
*/
static bool
dsdiff_decode_chunk(struct decoder *decoder, struct input_stream *is,
unsigned channels,
- uint64_t chunk_size,
- bool fileisdff,
- bool bitreverse)
+ uint64_t chunk_size)
{
uint8_t buffer[8192];
- /* Scratch buffer for DSF samples to convert to the needed
- normal Left/Right regime of samples */
- uint8_t dsf_scratch_buffer[8192];
-
const size_t sample_size = sizeof(buffer[0]);
const size_t frame_size = channels * sample_size;
const unsigned buffer_frames = sizeof(buffer) / frame_size;
@@ -499,12 +267,9 @@ dsdiff_decode_chunk(struct decoder *decoder, struct input_stream *is,
chunk_size -= nbytes;
- if (lsbitfirst || bitreverse)
+ if (lsbitfirst)
bit_reverse_buffer(buffer, buffer + nbytes);
- if (!fileisdff)
- dsf_to_pcm_order(buffer, dsf_scratch_buffer, nbytes);
-
enum decoder_command cmd =
decoder_data(decoder, is, buffer, nbytes, 0);
switch (cmd) {
@@ -516,13 +281,13 @@ dsdiff_decode_chunk(struct decoder *decoder, struct input_stream *is,
return false;
case DECODE_COMMAND_SEEK:
- /* not implemented yet */
+
+ /* Not implemented yet */
decoder_seek_error(decoder);
break;
}
}
-
- return dsdiff_skip(decoder, is, chunk_size);
+ return dsdlib_skip(decoder, is, chunk_size);
}
static void
@@ -534,13 +299,9 @@ dsdiff_stream_decode(struct decoder *decoder, struct input_stream *is)
};
struct dsdiff_chunk_header chunk_header;
- /* First see if it is is a DFF file */
+ /* check if it is is a proper DFF file */
if (!dsdiff_read_metadata(decoder, is, &metadata, &chunk_header))
- {
- /* It was not a DFF file, now check if it is a DSF file */
- if (!dsf_read_metadata(decoder, is, &metadata))
- return;
- }
+ return;
GError *error = NULL;
struct audio_format audio_format;
@@ -555,47 +316,28 @@ dsdiff_stream_decode(struct decoder *decoder, struct input_stream *is)
/* success: file was recognized */
decoder_initialized(decoder, &audio_format, false, -1);
- if (!metadata.fileisdff) {
- uint64_t chunk_size = metadata.chunk_size;
- if (!dsdiff_decode_chunk(decoder, is,
- metadata.channels,
- chunk_size,
- metadata.fileisdff,
- metadata.bitreverse))
- return;
+ /* every iteration of the following loop decodes one "DSD"
+ chunk from a DFF file */
- } else {
-
- /* every iteration of the following loop decodes one "DSD"
- chunk from a DFF file */
-
- while (true) {
-
- uint64_t chunk_size = dsdiff_chunk_size(&chunk_header);
-
- if (dsdiff_id_equals(&chunk_header.id, "DSD ")) {
- if (!dsdiff_decode_chunk(decoder, is,
- metadata.channels,
- chunk_size,
- metadata.fileisdff,
- /* Set bitreverse to
- false for DFF files */
- false))
- break;
- } else {
- /* ignore other chunks */
+ while (true) {
+ uint64_t chunk_size = dsdiff_chunk_size(&chunk_header);
- if (!dsdiff_skip(decoder, is, chunk_size))
+ if (dsdlib_id_equals(&chunk_header.id, "DSD ")) {
+ if (!dsdiff_decode_chunk(decoder, is,
+ metadata.channels,
+ chunk_size))
break;
- }
-
- /* read next chunk header; the first one was read by
- dsdiff_read_metadata() */
-
- if (!dsdiff_read_chunk_header(decoder,
- is, &chunk_header))
+ } else {
+ /* ignore other chunks */
+ if (!dsdlib_skip(decoder, is, chunk_size))
break;
}
+
+ /* read next chunk header; the first one was read by
+ dsdiff_read_metadata() */
+ if (!dsdiff_read_chunk_header(decoder,
+ is, &chunk_header))
+ break;
}
}
@@ -612,11 +354,7 @@ dsdiff_scan_stream(struct input_stream *is,
struct dsdiff_chunk_header chunk_header;
/* First check for DFF metadata */
if (!dsdiff_read_metadata(NULL, is, &metadata, &chunk_header))
- {
- /* It was not an DFF file, now check for DSF metadata */
- if (!dsf_read_metadata(NULL, is, &metadata))
- return false;
- }
+ return false;
struct audio_format audio_format;
if (!audio_format_init_checked(&audio_format, metadata.sample_rate / 8,
@@ -625,19 +363,16 @@ dsdiff_scan_stream(struct input_stream *is,
/* refuse to parse files which we cannot play anyway */
return false;
- /* no total time estimate, no tags implemented yet */
return true;
}
static const char *const dsdiff_suffixes[] = {
"dff",
- "dsf",
NULL
};
static const char *const dsdiff_mime_types[] = {
"application/x-dff",
- "application/x-dsf",
NULL
};