decoder/*: move to decoder/plugins/
This commit is contained in:
Max Kellermann
523
src/decoder/plugins/DsdiffDecoderPlugin.cxx
Normal file
523
src/decoder/plugins/DsdiffDecoderPlugin.cxx
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@@ -0,0 +1,523 @@
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/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* \file
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*
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* This plugin decodes DSDIFF data (SACD) embedded in DFF files.
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* The DFF code was modeled after the specification found here:
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* http://www.sonicstudio.com/pdf/dsd/DSDIFF_1.5_Spec.pdf
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*
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* All functions common to both DSD decoders have been moved to dsdlib
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*/
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#include "config.h"
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#include "DsdiffDecoderPlugin.hxx"
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#include "../DecoderAPI.hxx"
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#include "InputStream.hxx"
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#include "CheckAudioFormat.hxx"
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#include "util/bit_reverse.h"
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#include "util/Error.hxx"
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#include "system/ByteOrder.hxx"
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#include "tag/TagHandler.hxx"
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#include "DsdLib.hxx"
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#include "Log.hxx"
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struct DsdiffHeader {
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DsdId id;
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DffDsdUint64 size;
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DsdId format;
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};
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struct DsdiffChunkHeader {
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DsdId id;
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DffDsdUint64 size;
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/**
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* Read the "size" attribute from the specified header, converting it
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* to the host byte order if needed.
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*/
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constexpr
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uint64_t GetSize() const {
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return size.Read();
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}
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};
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/** struct for DSDIFF native Artist and Title tags */
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struct dsdiff_native_tag {
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uint32_t size;
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};
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struct DsdiffMetaData {
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unsigned sample_rate, channels;
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bool bitreverse;
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uint64_t chunk_size;
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#ifdef HAVE_ID3TAG
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InputStream::offset_type id3_offset;
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uint64_t id3_size;
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#endif
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/** offset for artist tag */
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InputStream::offset_type diar_offset;
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/** offset for title tag */
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InputStream::offset_type diti_offset;
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};
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static bool lsbitfirst;
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static bool
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dsdiff_init(const config_param ¶m)
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{
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lsbitfirst = param.GetBlockValue("lsbitfirst", false);
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return true;
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}
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static bool
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dsdiff_read_id(Decoder *decoder, InputStream &is,
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DsdId *id)
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{
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return dsdlib_read(decoder, is, id, sizeof(*id));
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}
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static bool
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dsdiff_read_chunk_header(Decoder *decoder, InputStream &is,
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DsdiffChunkHeader *header)
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{
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return dsdlib_read(decoder, is, header, sizeof(*header));
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}
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static bool
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dsdiff_read_payload(Decoder *decoder, InputStream &is,
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const DsdiffChunkHeader *header,
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void *data, size_t length)
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{
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uint64_t size = header->GetSize();
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if (size != (uint64_t)length)
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return false;
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size_t nbytes = decoder_read(decoder, is, data, length);
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return nbytes == length;
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}
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/**
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* Read and parse a "SND" chunk inside "PROP".
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*/
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static bool
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dsdiff_read_prop_snd(Decoder *decoder, InputStream &is,
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DsdiffMetaData *metadata,
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InputStream::offset_type end_offset)
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{
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DsdiffChunkHeader header;
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while ((InputStream::offset_type)(is.GetOffset() + sizeof(header)) <= end_offset) {
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if (!dsdiff_read_chunk_header(decoder, is, &header))
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return false;
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InputStream::offset_type chunk_end_offset = is.GetOffset()
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+ header.GetSize();
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if (chunk_end_offset > end_offset)
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return false;
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if (header.id.Equals("FS ")) {
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uint32_t sample_rate;
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if (!dsdiff_read_payload(decoder, is, &header,
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&sample_rate,
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sizeof(sample_rate)))
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return false;
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metadata->sample_rate = FromBE32(sample_rate);
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} else if (header.id.Equals("CHNL")) {
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uint16_t channels;
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if (header.GetSize() < sizeof(channels) ||
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!dsdlib_read(decoder, is,
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&channels, sizeof(channels)) ||
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!dsdlib_skip_to(decoder, is, chunk_end_offset))
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return false;
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metadata->channels = FromBE16(channels);
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} else if (header.id.Equals("CMPR")) {
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DsdId type;
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if (header.GetSize() < sizeof(type) ||
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!dsdlib_read(decoder, is,
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&type, sizeof(type)) ||
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!dsdlib_skip_to(decoder, is, chunk_end_offset))
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return false;
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if (!type.Equals("DSD "))
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/* only uncompressed DSD audio data
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is implemented */
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return false;
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} else {
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/* ignore unknown chunk */
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if (!dsdlib_skip_to(decoder, is, chunk_end_offset))
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return false;
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}
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}
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return is.GetOffset() == end_offset;
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}
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/**
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* Read and parse a "PROP" chunk.
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*/
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static bool
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dsdiff_read_prop(Decoder *decoder, InputStream &is,
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DsdiffMetaData *metadata,
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const DsdiffChunkHeader *prop_header)
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{
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uint64_t prop_size = prop_header->GetSize();
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InputStream::offset_type end_offset = is.GetOffset() + prop_size;
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DsdId prop_id;
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if (prop_size < sizeof(prop_id) ||
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!dsdiff_read_id(decoder, is, &prop_id))
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return false;
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if (prop_id.Equals("SND "))
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return dsdiff_read_prop_snd(decoder, is, metadata, end_offset);
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else
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/* ignore unknown PROP chunk */
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return dsdlib_skip_to(decoder, is, end_offset);
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}
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static void
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dsdiff_handle_native_tag(InputStream &is,
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const struct tag_handler *handler,
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void *handler_ctx, InputStream::offset_type tagoffset,
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TagType type)
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{
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if (!dsdlib_skip_to(nullptr, is, tagoffset))
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return;
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struct dsdiff_native_tag metatag;
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if (!dsdlib_read(nullptr, is, &metatag, sizeof(metatag)))
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return;
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uint32_t length = FromBE32(metatag.size);
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/* Check and limit size of the tag to prevent a stack overflow */
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if (length == 0 || length > 60)
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return;
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char string[length];
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char *label;
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label = string;
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if (!dsdlib_read(nullptr, is, label, (size_t)length))
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return;
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string[length] = '\0';
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tag_handler_invoke_tag(handler, handler_ctx, type, label);
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return;
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}
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/**
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* Read and parse additional metadata chunks for tagging purposes. By default
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* dsdiff files only support equivalents for artist and title but some of the
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* extract tools add an id3 tag to provide more tags. If such id3 is found
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* this will be used for tagging otherwise the native tags (if any) will be
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* used
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*/
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static bool
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dsdiff_read_metadata_extra(Decoder *decoder, InputStream &is,
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DsdiffMetaData *metadata,
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DsdiffChunkHeader *chunk_header,
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const struct tag_handler *handler,
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void *handler_ctx)
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{
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/* skip from DSD data to next chunk header */
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if (!dsdlib_skip(decoder, is, metadata->chunk_size))
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return false;
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if (!dsdiff_read_chunk_header(decoder, is, chunk_header))
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return false;
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#ifdef HAVE_ID3TAG
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metadata->id3_size = 0;
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#endif
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/* Now process all the remaining chunk headers in the stream
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and record their position and size */
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const auto size = is.GetSize();
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while (is.GetOffset() < size) {
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uint64_t chunk_size = chunk_header->GetSize();
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/* DIIN chunk, is directly followed by other chunks */
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if (chunk_header->id.Equals("DIIN"))
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chunk_size = 0;
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/* DIAR chunk - DSDIFF native tag for Artist */
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if (chunk_header->id.Equals("DIAR")) {
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chunk_size = chunk_header->GetSize();
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metadata->diar_offset = is.GetOffset();
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}
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/* DITI chunk - DSDIFF native tag for Title */
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if (chunk_header->id.Equals("DITI")) {
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chunk_size = chunk_header->GetSize();
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metadata->diti_offset = is.GetOffset();
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}
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#ifdef HAVE_ID3TAG
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/* 'ID3 ' chunk, offspec. Used by sacdextract */
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if (chunk_header->id.Equals("ID3 ")) {
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chunk_size = chunk_header->GetSize();
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metadata->id3_offset = is.GetOffset();
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metadata->id3_size = chunk_size;
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}
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#endif
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if (chunk_size != 0) {
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if (!dsdlib_skip(decoder, is, chunk_size))
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break;
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}
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if (is.GetOffset() < size) {
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if (!dsdiff_read_chunk_header(decoder, is, chunk_header))
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return false;
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}
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}
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/* done processing chunk headers, process tags if any */
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#ifdef HAVE_ID3TAG
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if (metadata->id3_offset != 0)
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{
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/* a ID3 tag has preference over the other tags, do not process
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other tags if we have one */
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dsdlib_tag_id3(is, handler, handler_ctx, metadata->id3_offset);
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return true;
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}
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#endif
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if (metadata->diar_offset != 0)
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dsdiff_handle_native_tag(is, handler, handler_ctx,
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metadata->diar_offset, TAG_ARTIST);
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if (metadata->diti_offset != 0)
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dsdiff_handle_native_tag(is, handler, handler_ctx,
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metadata->diti_offset, TAG_TITLE);
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return true;
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}
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/**
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* Read and parse all metadata chunks at the beginning. Stop when the
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* first "DSD" chunk is seen, and return its header in the
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* "chunk_header" parameter.
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*/
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static bool
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dsdiff_read_metadata(Decoder *decoder, InputStream &is,
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DsdiffMetaData *metadata,
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DsdiffChunkHeader *chunk_header)
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{
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DsdiffHeader header;
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if (!dsdlib_read(decoder, is, &header, sizeof(header)) ||
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!header.id.Equals("FRM8") ||
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!header.format.Equals("DSD "))
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return false;
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while (true) {
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if (!dsdiff_read_chunk_header(decoder, is,
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chunk_header))
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return false;
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if (chunk_header->id.Equals("PROP")) {
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if (!dsdiff_read_prop(decoder, is, metadata,
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chunk_header))
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return false;
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} else if (chunk_header->id.Equals("DSD ")) {
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const uint64_t chunk_size = chunk_header->GetSize();
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metadata->chunk_size = chunk_size;
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return true;
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} else {
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/* ignore unknown chunk */
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const uint64_t chunk_size = chunk_header->GetSize();
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InputStream::offset_type chunk_end_offset =
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is.GetOffset() + chunk_size;
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if (!dsdlib_skip_to(decoder, is, chunk_end_offset))
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return false;
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}
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}
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}
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static void
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bit_reverse_buffer(uint8_t *p, uint8_t *end)
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{
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for (; p < end; ++p)
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*p = bit_reverse(*p);
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}
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/**
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* Decode one "DSD" chunk.
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*/
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static bool
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dsdiff_decode_chunk(Decoder &decoder, InputStream &is,
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unsigned channels,
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uint64_t chunk_size)
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{
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uint8_t buffer[8192];
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const size_t sample_size = sizeof(buffer[0]);
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const size_t frame_size = channels * sample_size;
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const unsigned buffer_frames = sizeof(buffer) / frame_size;
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const unsigned buffer_samples = buffer_frames * frame_size;
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const size_t buffer_size = buffer_samples * sample_size;
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while (chunk_size > 0) {
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/* see how much aligned data from the remaining chunk
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fits into the local buffer */
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size_t now_size = buffer_size;
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if (chunk_size < (uint64_t)now_size) {
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unsigned now_frames =
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(unsigned)chunk_size / frame_size;
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now_size = now_frames * frame_size;
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}
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|
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size_t nbytes = decoder_read(decoder, is, buffer, now_size);
|
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if (nbytes != now_size)
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return false;
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chunk_size -= nbytes;
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|
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if (lsbitfirst)
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bit_reverse_buffer(buffer, buffer + nbytes);
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const auto cmd = decoder_data(decoder, is, buffer, nbytes, 0);
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switch (cmd) {
|
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case DecoderCommand::NONE:
|
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break;
|
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|
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case DecoderCommand::START:
|
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case DecoderCommand::STOP:
|
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return false;
|
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|
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case DecoderCommand::SEEK:
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|
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/* Not implemented yet */
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decoder_seek_error(decoder);
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break;
|
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}
|
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}
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return dsdlib_skip(&decoder, is, chunk_size);
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}
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static void
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dsdiff_stream_decode(Decoder &decoder, InputStream &is)
|
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{
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DsdiffMetaData metadata;
|
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|
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DsdiffChunkHeader chunk_header;
|
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/* check if it is is a proper DFF file */
|
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if (!dsdiff_read_metadata(&decoder, is, &metadata, &chunk_header))
|
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return;
|
||||
|
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Error error;
|
||||
AudioFormat audio_format;
|
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if (!audio_format_init_checked(audio_format, metadata.sample_rate / 8,
|
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SampleFormat::DSD,
|
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metadata.channels, error)) {
|
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LogError(error);
|
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return;
|
||||
}
|
||||
|
||||
/* calculate song time from DSD chunk size and sample frequency */
|
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uint64_t chunk_size = metadata.chunk_size;
|
||||
float songtime = ((chunk_size / metadata.channels) * 8) /
|
||||
(float) metadata.sample_rate;
|
||||
|
||||
/* success: file was recognized */
|
||||
decoder_initialized(decoder, audio_format, false, songtime);
|
||||
|
||||
/* every iteration of the following loop decodes one "DSD"
|
||||
chunk from a DFF file */
|
||||
|
||||
while (true) {
|
||||
chunk_size = chunk_header.GetSize();
|
||||
|
||||
if (chunk_header.id.Equals("DSD ")) {
|
||||
if (!dsdiff_decode_chunk(decoder, is,
|
||||
metadata.channels,
|
||||
chunk_size))
|
||||
break;
|
||||
} 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;
|
||||
}
|
||||
}
|
||||
|
||||
static bool
|
||||
dsdiff_scan_stream(InputStream &is,
|
||||
gcc_unused const struct tag_handler *handler,
|
||||
gcc_unused void *handler_ctx)
|
||||
{
|
||||
DsdiffMetaData metadata;
|
||||
DsdiffChunkHeader chunk_header;
|
||||
|
||||
/* First check for DFF metadata */
|
||||
if (!dsdiff_read_metadata(nullptr, is, &metadata, &chunk_header))
|
||||
return false;
|
||||
|
||||
AudioFormat audio_format;
|
||||
if (!audio_format_init_checked(audio_format, metadata.sample_rate / 8,
|
||||
SampleFormat::DSD,
|
||||
metadata.channels, IgnoreError()))
|
||||
/* refuse to parse files which we cannot play anyway */
|
||||
return false;
|
||||
|
||||
/* calculate song time and add as tag */
|
||||
unsigned songtime = ((metadata.chunk_size / metadata.channels) * 8) /
|
||||
metadata.sample_rate;
|
||||
tag_handler_invoke_duration(handler, handler_ctx, songtime);
|
||||
|
||||
/* Read additional metadata and created tags if available */
|
||||
dsdiff_read_metadata_extra(nullptr, is, &metadata, &chunk_header,
|
||||
handler, handler_ctx);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static const char *const dsdiff_suffixes[] = {
|
||||
"dff",
|
||||
nullptr
|
||||
};
|
||||
|
||||
static const char *const dsdiff_mime_types[] = {
|
||||
"application/x-dff",
|
||||
nullptr
|
||||
};
|
||||
|
||||
const struct DecoderPlugin dsdiff_decoder_plugin = {
|
||||
"dsdiff",
|
||||
dsdiff_init,
|
||||
nullptr,
|
||||
dsdiff_stream_decode,
|
||||
nullptr,
|
||||
nullptr,
|
||||
dsdiff_scan_stream,
|
||||
nullptr,
|
||||
dsdiff_suffixes,
|
||||
dsdiff_mime_types,
|
||||
};
|
||||
Reference in New Issue
Block a user