diff options
Diffstat (limited to 'src/decoder')
| -rw-r--r-- | src/decoder/dsdiff_decoder_plugin.c | 379 | ||||
| -rw-r--r-- | src/decoder/dsdiff_decoder_plugin.h | 2 | ||||
| -rw-r--r-- | src/decoder/dsdlib.c | 112 | ||||
| -rw-r--r-- | src/decoder/dsdlib.h | 42 | ||||
| -rw-r--r-- | src/decoder/dsf_decoder_plugin.c | 328 | ||||
| -rw-r--r-- | src/decoder/dsf_decoder_plugin.h | 25 |
6 files changed, 565 insertions, 323 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 }; diff --git a/src/decoder/dsdiff_decoder_plugin.h b/src/decoder/dsdiff_decoder_plugin.h index 34e1438de..452f9050b 100644 --- a/src/decoder/dsdiff_decoder_plugin.h +++ b/src/decoder/dsdiff_decoder_plugin.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2011 The Music Player Daemon Project + * Copyright (C) 2003-2012 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify diff --git a/src/decoder/dsdlib.c b/src/decoder/dsdlib.c new file mode 100644 index 000000000..3df9497c4 --- /dev/null +++ b/src/decoder/dsdlib.c @@ -0,0 +1,112 @@ +/* + * Copyright (C) 2012 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* \file + * + * This file contains functions used by the DSF and DSDIFF decoders. + * + */ + +#include "config.h" +#include "dsf_decoder_plugin.h" +#include "decoder_api.h" +#include "util/bit_reverse.h" +#include "dsdlib.h" +#include "dsdiff_decoder_plugin.h" + +#include <unistd.h> +#include <stdio.h> /* for SEEK_SET, SEEK_CUR */ + +bool +dsdlib_id_equals(const struct dsdlib_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; +} + +bool +dsdlib_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; +} + +/** + * Skip the #input_stream to the specified offset. + */ +bool +dsdlib_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. + */ +bool +dsdlib_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; +} + diff --git a/src/decoder/dsdlib.h b/src/decoder/dsdlib.h new file mode 100644 index 000000000..d9675f5fe --- /dev/null +++ b/src/decoder/dsdlib.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2012 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DECODER_DSDLIB_H +#define MPD_DECODER_DSDLIB_H + +struct dsdlib_id { + char value[4]; +}; + +bool +dsdlib_id_equals(const struct dsdlib_id *id, const char *s); + +bool +dsdlib_read(struct decoder *decoder, struct input_stream *is, + void *data, size_t length); + +bool +dsdlib_skip_to(struct decoder *decoder, struct input_stream *is, + goffset offset); + +bool +dsdlib_skip(struct decoder *decoder, struct input_stream *is, + goffset delta); + +#endif diff --git a/src/decoder/dsf_decoder_plugin.c b/src/decoder/dsf_decoder_plugin.c new file mode 100644 index 000000000..b66ed75e9 --- /dev/null +++ b/src/decoder/dsf_decoder_plugin.c @@ -0,0 +1,328 @@ +/* + * Copyright (C) 2012 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* \file + * + * This plugin decodes DSDIFF data (SACD) embedded in DSF files. + * + * 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" +#include "dsf_decoder_plugin.h" +#include "decoder_api.h" +#include "audio_check.h" +#include "util/bit_reverse.h" +#include "dsdlib.h" + +#include <unistd.h> +#include <stdio.h> /* for SEEK_SET, SEEK_CUR */ + +#undef G_LOG_DOMAIN +#define G_LOG_DOMAIN "dsf" + +struct dsf_metadata { + unsigned sample_rate, channels; + bool bitreverse; + uint64_t chunk_size; +}; + +struct dsf_header { + /** DSF header id: "DSD " */ + struct dsdlib_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 dsdlib_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 dsdlib_id id; + /** "data" chunk size, includes header (id+size) */ + uint32_t size_low, size_high; +}; + +/** + * Read and parse all needed metadata chunks for DSF files. + */ +static bool +dsf_read_metadata(struct decoder *decoder, struct input_stream *is, + struct dsf_metadata *metadata) +{ + uint64_t chunk_size; + struct dsf_header dsf_header; + if (!dsdlib_read(decoder, is, &dsf_header, sizeof(dsf_header)) || + !dsdlib_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 (!dsdlib_read(decoder, is, &dsf_fmt_chunk, sizeof(dsf_fmt_chunk)) || + !dsdlib_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 (!dsdlib_read(decoder, is, &data_chunk, sizeof(data_chunk)) || + !dsdlib_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; + return true; +} + +static void +bit_reverse_buffer(uint8_t *p, uint8_t *end) +{ + for (; p < end; ++p) + *p = bit_reverse(*p); +} + +/** + * 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 complete DSF 'data' chunk i.e. a complete song + */ +static bool +dsf_decode_chunk(struct decoder *decoder, struct input_stream *is, + unsigned channels, + uint64_t chunk_size, + bool bitreverse) +{ + 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; + const unsigned buffer_samples = buffer_frames * frame_size; + const size_t buffer_size = buffer_samples * sample_size; + + while (chunk_size > 0) { + /* see how much aligned data from the remaining chunk + fits into the local buffer */ + unsigned now_frames = buffer_frames; + size_t now_size = buffer_size; + if (chunk_size < (uint64_t)now_size) { + now_frames = (unsigned)chunk_size / frame_size; + now_size = now_frames * frame_size; + } + + size_t nbytes = decoder_read(decoder, is, buffer, now_size); + if (nbytes != now_size) + return false; + + chunk_size -= nbytes; + + if (bitreverse) + bit_reverse_buffer(buffer, buffer + nbytes); + + dsf_to_pcm_order(buffer, dsf_scratch_buffer, nbytes); + + enum decoder_command cmd = + decoder_data(decoder, is, buffer, nbytes, 0); + switch (cmd) { + case DECODE_COMMAND_NONE: + break; + + case DECODE_COMMAND_START: + case DECODE_COMMAND_STOP: + return false; + + case DECODE_COMMAND_SEEK: + + /* not implemented yet */ + decoder_seek_error(decoder); + break; + } + } + return dsdlib_skip(decoder, is, chunk_size); +} + +static void +dsf_stream_decode(struct decoder *decoder, struct input_stream *is) +{ + struct dsf_metadata metadata = { + .sample_rate = 0, + .channels = 0, + }; + + /* check if it is a proper DSF file */ + if (!dsf_read_metadata(decoder, is, &metadata)) + return; + + GError *error = NULL; + struct audio_format audio_format; + if (!audio_format_init_checked(&audio_format, metadata.sample_rate / 8, + SAMPLE_FORMAT_DSD, + metadata.channels, &error)) { + g_warning("%s", error->message); + g_error_free(error); + return; + } + + /* success: file was recognized */ + decoder_initialized(decoder, &audio_format, false, -1); + + if (!dsf_decode_chunk(decoder, is, metadata.channels, + metadata.chunk_size, + metadata.bitreverse)) + return; +} + +static bool +dsf_scan_stream(struct input_stream *is, + G_GNUC_UNUSED const struct tag_handler *handler, + G_GNUC_UNUSED void *handler_ctx) +{ + struct dsf_metadata metadata = { + .sample_rate = 0, + .channels = 0, + }; + + /* check DSF metadata */ + if (!dsf_read_metadata(NULL, is, &metadata)) + return false; + + struct audio_format audio_format; + if (!audio_format_init_checked(&audio_format, metadata.sample_rate / 8, + SAMPLE_FORMAT_DSD, + metadata.channels, NULL)) + /* refuse to parse files which we cannot play anyway */ + return false; + + return true; +} + +static const char *const dsf_suffixes[] = { + "dsf", + NULL +}; + +static const char *const dsf_mime_types[] = { + "application/x-dsf", + NULL +}; + +const struct decoder_plugin dsf_decoder_plugin = { + .name = "dsf", + .stream_decode = dsf_stream_decode, + .scan_stream = dsf_scan_stream, + .suffixes = dsf_suffixes, + .mime_types = dsf_mime_types, +}; diff --git a/src/decoder/dsf_decoder_plugin.h b/src/decoder/dsf_decoder_plugin.h new file mode 100644 index 000000000..401d3fed7 --- /dev/null +++ b/src/decoder/dsf_decoder_plugin.h @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2012 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DECODER_DSF_H +#define MPD_DECODER_DSF_H + +extern const struct decoder_plugin dsf_decoder_plugin; + +#endif |