decoder/*: move to decoder/plugins/

2014-01-24 00:02:24 +01:00
parent ea5b901bcc
commit 51adaf2c47
111 changed files with 142 additions and 142 deletions
@@ -0,0 +1,223 @@
+/*
+ * Copyright (C) 2003-2014 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.
+ */
+
+#include "config.h"
+#include "FlacMetadata.hxx"
+#include "XiphTags.hxx"
+#include "MixRampInfo.hxx"
+#include "tag/TagHandler.hxx"
+#include "tag/TagTable.hxx"
+#include "tag/TagBuilder.hxx"
+#include "tag/Tag.hxx"
+#include "ReplayGainInfo.hxx"
+#include "util/ASCII.hxx"
+#include "util/SplitString.hxx"
+
+#include <string.h>
+
+static const char *
+vorbis_comment_value(const FLAC__StreamMetadata *block,
+		     const char *name)
+{
+	int offset =
+		FLAC__metadata_object_vorbiscomment_find_entry_from(block, 0,
+								    name);
+	if (offset < 0)
+		return nullptr;
+
+	size_t name_length = strlen(name);
+
+	const FLAC__StreamMetadata_VorbisComment_Entry &vc =
+		block->data.vorbis_comment.comments[offset];
+	const char *comment = (const char *)vc.entry;
+
+	/* 1 is for '=' */
+	return comment + name_length + 1;
+}
+
+static bool
+flac_find_float_comment(const FLAC__StreamMetadata *block,
+			const char *cmnt, float *fl)
+{
+	const char *value = vorbis_comment_value(block, cmnt);
+	if (value == nullptr)
+		return false;
+
+	*fl = (float)atof(value);
+	return true;
+}
+
+bool
+flac_parse_replay_gain(ReplayGainInfo &rgi,
+		       const FLAC__StreamMetadata *block)
+{
+	rgi.Clear();
+
+	bool found = false;
+	if (flac_find_float_comment(block, "replaygain_album_gain",
+				    &rgi.tuples[REPLAY_GAIN_ALBUM].gain))
+		found = true;
+	if (flac_find_float_comment(block, "replaygain_album_peak",
+				    &rgi.tuples[REPLAY_GAIN_ALBUM].peak))
+		found = true;
+	if (flac_find_float_comment(block, "replaygain_track_gain",
+				    &rgi.tuples[REPLAY_GAIN_TRACK].gain))
+		found = true;
+	if (flac_find_float_comment(block, "replaygain_track_peak",
+				    &rgi.tuples[REPLAY_GAIN_TRACK].peak))
+		found = true;
+
+	return found;
+}
+
+gcc_pure
+static std::string
+flac_find_string_comment(const FLAC__StreamMetadata *block, const char *cmnt)
+{
+	const char *value = vorbis_comment_value(block, cmnt);
+	if (value == nullptr)
+		return std::string();
+
+	return std::string(value);
+}
+
+MixRampInfo
+flac_parse_mixramp(const FLAC__StreamMetadata *block)
+{
+	MixRampInfo mix_ramp;
+	mix_ramp.SetStart(flac_find_string_comment(block, "mixramp_start"));
+	mix_ramp.SetEnd(flac_find_string_comment(block, "mixramp_end"));
+	return mix_ramp;
+}
+
+/**
+ * Checks if the specified name matches the entry's name, and if yes,
+ * returns the comment value;
+ */
+static const char *
+flac_comment_value(const FLAC__StreamMetadata_VorbisComment_Entry *entry,
+		   const char *name)
+{
+	size_t name_length = strlen(name);
+	const char *comment = (const char*)entry->entry;
+
+	if (!StringEqualsCaseASCII(comment, name, name_length))
+		return nullptr;
+
+	if (comment[name_length] == '=') {
+		return comment + name_length + 1;
+	}
+
+	return nullptr;
+}
+
+/**
+ * Check if the comment's name equals the passed name, and if so, copy
+ * the comment value into the tag.
+ */
+static bool
+flac_copy_comment(const FLAC__StreamMetadata_VorbisComment_Entry *entry,
+		  const char *name, TagType tag_type,
+		  const struct tag_handler *handler, void *handler_ctx)
+{
+	const char *value = flac_comment_value(entry, name);
+	if (value != nullptr) {
+		tag_handler_invoke_tag(handler, handler_ctx, tag_type, value);
+		return true;
+	}
+
+	return false;
+}
+
+static void
+flac_scan_comment(const FLAC__StreamMetadata_VorbisComment_Entry *entry,
+		  const struct tag_handler *handler, void *handler_ctx)
+{
+	if (handler->pair != nullptr) {
+		const char *comment = (const char *)entry->entry;
+		const SplitString split(comment, '=');
+		if (split.IsDefined() && !split.IsEmpty())
+			tag_handler_invoke_pair(handler, handler_ctx,
+						split.GetFirst(),
+						split.GetSecond());
+	}
+
+	for (const struct tag_table *i = xiph_tags; i->name != nullptr; ++i)
+		if (flac_copy_comment(entry, i->name, i->type,
+				      handler, handler_ctx))
+			return;
+
+	for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
+		if (flac_copy_comment(entry,
+				      tag_item_names[i], (TagType)i,
+				      handler, handler_ctx))
+			return;
+}
+
+static void
+flac_scan_comments(const FLAC__StreamMetadata_VorbisComment *comment,
+		   const struct tag_handler *handler, void *handler_ctx)
+{
+	for (unsigned i = 0; i < comment->num_comments; ++i)
+		flac_scan_comment(&comment->comments[i],
+				  handler, handler_ctx);
+}
+
+void
+flac_scan_metadata(const FLAC__StreamMetadata *block,
+		   const struct tag_handler *handler, void *handler_ctx)
+{
+	switch (block->type) {
+	case FLAC__METADATA_TYPE_VORBIS_COMMENT:
+		flac_scan_comments(&block->data.vorbis_comment,
+				   handler, handler_ctx);
+		break;
+
+	case FLAC__METADATA_TYPE_STREAMINFO:
+		if (block->data.stream_info.sample_rate > 0)
+			tag_handler_invoke_duration(handler, handler_ctx,
+						    flac_duration(&block->data.stream_info));
+		break;
+
+	default:
+		break;
+	}
+}
+
+Tag
+flac_vorbis_comments_to_tag(const FLAC__StreamMetadata_VorbisComment *comment)
+{
+	TagBuilder tag_builder;
+	flac_scan_comments(comment, &add_tag_handler, &tag_builder);
+	return tag_builder.Commit();
+}
+
+void
+FlacMetadataChain::Scan(const struct tag_handler *handler, void *handler_ctx)
+{
+	FLACMetadataIterator iterator(*this);
+
+	do {
+		FLAC__StreamMetadata *block = iterator.GetBlock();
+		if (block == nullptr)
+			break;
+
+		flac_scan_metadata(block, handler, handler_ctx);
+	} while (iterator.Next());
+}