Adding upstream version 1.4.3+ds.upstream/1.4.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 1492 insertions, 0 deletions

diff --git a/src/test_libs_common/CMakeLists.txt b/src/test_libs_common/CMakeLists.txt
new file mode 100644
index 0000000..8a0c871
--- /dev/null
+++ b/src/test_libs_common/CMakeLists.txt
@@ -0,0 +1,4 @@
+add_library(test_libs_common STATIC
+    file_utils_flac.c
+    metadata_utils.c)
+target_link_libraries(test_libs_common PUBLIC FLAC)
diff --git a/src/test_libs_common/Makefile.am b/src/test_libs_common/Makefile.am
new file mode 100644
index 0000000..30e1f15
--- /dev/null
+++ b/src/test_libs_common/Makefile.am
@@ -0,0 +1,29 @@
+#  test_libs_common - Common code to library unit tests
+#  Copyright (C) 2000-2009  Josh Coalson
+#  Copyright (C) 2011-2023  Xiph.Org Foundation
+#
+#  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.
+
+AM_CPPFLAGS = -I$(top_builddir) -I$(srcdir)/include -I$(top_srcdir)/include
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+
+libtest_libs_common_la_SOURCES = \
+	file_utils_flac.c \
+	metadata_utils.c
+
+EXTRA_DIST = \
+	CMakeLists.txt \
+	README
diff --git a/src/test_libs_common/Makefile.in b/src/test_libs_common/Makefile.in
new file mode 100644
index 0000000..83af7f9
--- /dev/null
+++ b/src/test_libs_common/Makefile.in
@@ -0,0 +1,666 @@
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+#  test_libs_common - Common code to library unit tests
+#  Copyright (C) 2000-2009  Josh Coalson
+#  Copyright (C) 2011-2023  Xiph.Org Foundation
+#
+#  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,
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+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/file_utils_flac.Plo
+	-rm -f ./$(DEPDIR)/metadata_utils.Plo
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
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+html: html-am
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+html-am:
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+info: info-am
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+info-am:
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+install-ps: install-ps-am
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+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/file_utils_flac.Plo
+	-rm -f ./$(DEPDIR)/metadata_utils.Plo
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
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+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
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+ps-am:
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+uninstall-am:
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+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/test_libs_common/README b/src/test_libs_common/README
new file mode 100644
index 0000000..6a704c2
--- /dev/null
+++ b/src/test_libs_common/README
@@ -0,0 +1,2 @@
+This directory contains a convenience library of routines that are
+common to the library unit testers.
diff --git a/src/test_libs_common/file_utils_flac.c b/src/test_libs_common/file_utils_flac.c
new file mode 100644
index 0000000..3cc8c30
--- /dev/null
+++ b/src/test_libs_common/file_utils_flac.c
@@ -0,0 +1,155 @@
+/* test_libFLAC - Unit tester for libFLAC
+ * Copyright (C) 2002-2009  Josh Coalson
+ * Copyright (C) 2011-2023  Xiph.Org Foundation
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "FLAC/assert.h"
+#include "FLAC/stream_encoder.h"
+#include "test_libs_common/file_utils_flac.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h> /* for stat() */
+#include "share/compat.h"
+
+#ifdef min
+#undef min
+#endif
+#define min(a,b) ((a)<(b)?(a):(b))
+
+const long file_utils__ogg_serial_number = 12345;
+
+#ifdef FLAC__VALGRIND_TESTING
+static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
+{
+	size_t ret = fwrite(ptr, size, nmemb, stream);
+	if(!ferror(stream))
+		fflush(stream);
+	return ret;
+}
+#else
+#define local__fwrite fwrite
+#endif
+
+typedef struct {
+	FILE *file;
+} encoder_client_struct;
+
+static FLAC__StreamEncoderWriteStatus encoder_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, uint32_t samples, uint32_t current_frame, void *client_data)
+{
+	encoder_client_struct *ecd = (encoder_client_struct*)client_data;
+
+	(void)encoder, (void)samples, (void)current_frame;
+
+	if(local__fwrite(buffer, 1, bytes, ecd->file) != bytes)
+		return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
+	else
+		return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
+}
+
+static void encoder_metadata_callback_(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetadata *metadata, void *client_data)
+{
+	(void)encoder, (void)metadata, (void)client_data;
+}
+
+FLAC__bool file_utils__generate_flacfile(FLAC__bool is_ogg, const char *output_filename, FLAC__off_t *output_filesize, uint32_t length, const FLAC__StreamMetadata *streaminfo, FLAC__StreamMetadata **metadata, uint32_t num_metadata)
+{
+	FLAC__int32 samples[1024];
+	FLAC__StreamEncoder *encoder;
+	FLAC__StreamEncoderInitStatus init_status;
+	encoder_client_struct encoder_client_data;
+	uint32_t i, n;
+
+	FLAC__ASSERT(0 != output_filename);
+	FLAC__ASSERT(0 != streaminfo);
+	FLAC__ASSERT(streaminfo->type == FLAC__METADATA_TYPE_STREAMINFO);
+	FLAC__ASSERT((streaminfo->is_last && num_metadata == 0) || (!streaminfo->is_last && num_metadata > 0));
+
+	if(0 == (encoder_client_data.file = flac_fopen(output_filename, "wb")))
+		return false;
+
+	encoder = FLAC__stream_encoder_new();
+	if(0 == encoder) {
+		fclose(encoder_client_data.file);
+		return false;
+	}
+
+	FLAC__stream_encoder_set_ogg_serial_number(encoder, file_utils__ogg_serial_number);
+	FLAC__stream_encoder_set_verify(encoder, true);
+	FLAC__stream_encoder_set_streamable_subset(encoder, true);
+	FLAC__stream_encoder_set_do_mid_side_stereo(encoder, false);
+	FLAC__stream_encoder_set_loose_mid_side_stereo(encoder, false);
+	FLAC__stream_encoder_set_channels(encoder, streaminfo->data.stream_info.channels);
+	FLAC__stream_encoder_set_bits_per_sample(encoder, streaminfo->data.stream_info.bits_per_sample);
+	FLAC__stream_encoder_set_sample_rate(encoder, streaminfo->data.stream_info.sample_rate);
+	FLAC__stream_encoder_set_blocksize(encoder, streaminfo->data.stream_info.min_blocksize);
+	FLAC__stream_encoder_set_max_lpc_order(encoder, 0);
+	FLAC__stream_encoder_set_qlp_coeff_precision(encoder, 0);
+	FLAC__stream_encoder_set_do_qlp_coeff_prec_search(encoder, false);
+	FLAC__stream_encoder_set_do_escape_coding(encoder, false);
+	FLAC__stream_encoder_set_do_exhaustive_model_search(encoder, false);
+	FLAC__stream_encoder_set_min_residual_partition_order(encoder, 0);
+	FLAC__stream_encoder_set_max_residual_partition_order(encoder, 0);
+	FLAC__stream_encoder_set_rice_parameter_search_dist(encoder, 0);
+	FLAC__stream_encoder_set_total_samples_estimate(encoder, streaminfo->data.stream_info.total_samples);
+	FLAC__stream_encoder_set_metadata(encoder, metadata, num_metadata);
+
+	if(is_ogg)
+		init_status = FLAC__stream_encoder_init_ogg_stream(encoder, /*read_callback=*/0, encoder_write_callback_, /*seek_callback=*/0, /*tell_callback=*/0, encoder_metadata_callback_, &encoder_client_data);
+	else
+		init_status = FLAC__stream_encoder_init_stream(encoder, encoder_write_callback_, /*seek_callback=*/0, /*tell_callback=*/0, encoder_metadata_callback_, &encoder_client_data);
+
+	if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
+		fclose(encoder_client_data.file);
+		return false;
+	}
+
+	/* init the dummy sample buffer */
+	for(i = 0; i < sizeof(samples) / sizeof(FLAC__int32); i++)
+		samples[i] = i & 7;
+
+	while(length > 0) {
+		n = min(length, sizeof(samples) / sizeof(FLAC__int32));
+
+		if(!FLAC__stream_encoder_process_interleaved(encoder, samples, n)) {
+			fclose(encoder_client_data.file);
+			return false;
+		}
+
+		length -= n;
+	}
+
+	(void)FLAC__stream_encoder_finish(encoder);
+
+	fclose(encoder_client_data.file);
+
+	FLAC__stream_encoder_delete(encoder);
+
+	if(0 != output_filesize) {
+		struct flac_stat_s filestats;
+
+		if(flac_stat(output_filename, &filestats) != 0)
+			return false;
+		else
+			*output_filesize = filestats.st_size;
+	}
+
+	return true;
+}
diff --git a/src/test_libs_common/metadata_utils.c b/src/test_libs_common/metadata_utils.c
new file mode 100644
index 0000000..929ca63
--- /dev/null
+++ b/src/test_libs_common/metadata_utils.c
@@ -0,0 +1,636 @@
+/* test_libFLAC - Unit tester for libFLAC
+ * Copyright (C) 2002-2009  Josh Coalson
+ * Copyright (C) 2011-2023  Xiph.Org Foundation
+ *
+ * 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.
+ */
+
+/*
+ * These are not tests, just utility functions used by the metadata tests
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "FLAC/metadata.h"
+#include "test_libs_common/metadata_utils.h"
+#include "share/compat.h"
+#include <stdio.h>
+#include <stdlib.h> /* for malloc() */
+#include <string.h> /* for memcmp() */
+
+FLAC__bool mutils__compare_block_data_streaminfo(const FLAC__StreamMetadata_StreamInfo *block, const FLAC__StreamMetadata_StreamInfo *blockcopy)
+{
+	if(blockcopy->min_blocksize != block->min_blocksize) {
+		printf("FAILED, min_blocksize mismatch, expected %u, got %u\n", block->min_blocksize, blockcopy->min_blocksize);
+		return false;
+	}
+	if(blockcopy->max_blocksize != block->max_blocksize) {
+		printf("FAILED, max_blocksize mismatch, expected %u, got %u\n", block->max_blocksize, blockcopy->max_blocksize);
+		return false;
+	}
+	if(blockcopy->min_framesize != block->min_framesize) {
+		printf("FAILED, min_framesize mismatch, expected %u, got %u\n", block->min_framesize, blockcopy->min_framesize);
+		return false;
+	}
+	if(blockcopy->max_framesize != block->max_framesize) {
+		printf("FAILED, max_framesize mismatch, expected %u, got %u\n", block->max_framesize, blockcopy->max_framesize);
+		return false;
+	}
+	if(blockcopy->sample_rate != block->sample_rate) {
+		printf("FAILED, sample_rate mismatch, expected %u, got %u\n", block->sample_rate, blockcopy->sample_rate);
+		return false;
+	}
+	if(blockcopy->channels != block->channels) {
+		printf("FAILED, channels mismatch, expected %u, got %u\n", block->channels, blockcopy->channels);
+		return false;
+	}
+	if(blockcopy->bits_per_sample != block->bits_per_sample) {
+		printf("FAILED, bits_per_sample mismatch, expected %u, got %u\n", block->bits_per_sample, blockcopy->bits_per_sample);
+		return false;
+	}
+	if(blockcopy->total_samples != block->total_samples) {
+		printf("FAILED, total_samples mismatch, expected %" PRIu64 ", got %" PRIu64 "\n", block->total_samples, blockcopy->total_samples);
+		return false;
+	}
+	if(0 != memcmp(blockcopy->md5sum, block->md5sum, sizeof(block->md5sum))) {
+		printf("FAILED, md5sum mismatch, expected %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, got %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
+			(uint32_t)block->md5sum[0],
+			(uint32_t)block->md5sum[1],
+			(uint32_t)block->md5sum[2],
+			(uint32_t)block->md5sum[3],
+			(uint32_t)block->md5sum[4],
+			(uint32_t)block->md5sum[5],
+			(uint32_t)block->md5sum[6],
+			(uint32_t)block->md5sum[7],
+			(uint32_t)block->md5sum[8],
+			(uint32_t)block->md5sum[9],
+			(uint32_t)block->md5sum[10],
+			(uint32_t)block->md5sum[11],
+			(uint32_t)block->md5sum[12],
+			(uint32_t)block->md5sum[13],
+			(uint32_t)block->md5sum[14],
+			(uint32_t)block->md5sum[15],
+			(uint32_t)blockcopy->md5sum[0],
+			(uint32_t)blockcopy->md5sum[1],
+			(uint32_t)blockcopy->md5sum[2],
+			(uint32_t)blockcopy->md5sum[3],
+			(uint32_t)blockcopy->md5sum[4],
+			(uint32_t)blockcopy->md5sum[5],
+			(uint32_t)blockcopy->md5sum[6],
+			(uint32_t)blockcopy->md5sum[7],
+			(uint32_t)blockcopy->md5sum[8],
+			(uint32_t)blockcopy->md5sum[9],
+			(uint32_t)blockcopy->md5sum[10],
+			(uint32_t)blockcopy->md5sum[11],
+			(uint32_t)blockcopy->md5sum[12],
+			(uint32_t)blockcopy->md5sum[13],
+			(uint32_t)blockcopy->md5sum[14],
+			(uint32_t)blockcopy->md5sum[15]
+		);
+		return false;
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_padding(const FLAC__StreamMetadata_Padding *block, const FLAC__StreamMetadata_Padding *blockcopy, uint32_t block_length)
+{
+	/* we don't compare the padding guts */
+	(void)block, (void)blockcopy, (void)block_length;
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_application(const FLAC__StreamMetadata_Application *block, const FLAC__StreamMetadata_Application *blockcopy, uint32_t block_length)
+{
+	if(block_length < sizeof(block->id)) {
+		printf("FAILED, bad block length = %u\n", block_length);
+		return false;
+	}
+	if(0 != memcmp(blockcopy->id, block->id, sizeof(block->id))) {
+		printf("FAILED, id mismatch, expected %02X%02X%02X%02X, got %02X%02X%02X%02X\n",
+			(uint32_t)block->id[0],
+			(uint32_t)block->id[1],
+			(uint32_t)block->id[2],
+			(uint32_t)block->id[3],
+			(uint32_t)blockcopy->id[0],
+			(uint32_t)blockcopy->id[1],
+			(uint32_t)blockcopy->id[2],
+			(uint32_t)blockcopy->id[3]
+		);
+		return false;
+	}
+	if(0 == block->data || 0 == blockcopy->data) {
+		if(block->data != blockcopy->data) {
+			printf("FAILED, data mismatch (%s's data pointer is null)\n", 0==block->data?"original":"copy");
+			return false;
+		}
+		else if(block_length - sizeof(block->id) > 0) {
+			printf("FAILED, data pointer is null but block length is not 0\n");
+			return false;
+		}
+	}
+	else {
+		if(block_length - sizeof(block->id) == 0) {
+			printf("FAILED, data pointer is not null but block length is 0\n");
+			return false;
+		}
+		else if(0 != memcmp(blockcopy->data, block->data, block_length - sizeof(block->id))) {
+			printf("FAILED, data mismatch\n");
+			return false;
+		}
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_seektable(const FLAC__StreamMetadata_SeekTable *block, const FLAC__StreamMetadata_SeekTable *blockcopy)
+{
+	uint32_t i;
+	if(blockcopy->num_points != block->num_points) {
+		printf("FAILED, num_points mismatch, expected %u, got %u\n", block->num_points, blockcopy->num_points);
+		return false;
+	}
+	for(i = 0; i < block->num_points; i++) {
+		if(blockcopy->points[i].sample_number != block->points[i].sample_number) {
+			printf("FAILED, points[%u].sample_number mismatch, expected %" PRIu64 ", got %" PRIu64 "\n", i, block->points[i].sample_number, blockcopy->points[i].sample_number);
+			return false;
+		}
+		if(blockcopy->points[i].stream_offset != block->points[i].stream_offset) {
+			printf("FAILED, points[%u].stream_offset mismatch, expected %" PRIu64 ", got %" PRIu64 "\n", i, block->points[i].stream_offset, blockcopy->points[i].stream_offset);
+			return false;
+		}
+		if(blockcopy->points[i].frame_samples != block->points[i].frame_samples) {
+			printf("FAILED, points[%u].frame_samples mismatch, expected %u, got %u\n", i, block->points[i].frame_samples, blockcopy->points[i].frame_samples);
+			return false;
+		}
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_vorbiscomment(const FLAC__StreamMetadata_VorbisComment *block, const FLAC__StreamMetadata_VorbisComment *blockcopy)
+{
+	uint32_t i;
+	if(blockcopy->vendor_string.length != block->vendor_string.length) {
+		printf("FAILED, vendor_string.length mismatch, expected %u, got %u\n", block->vendor_string.length, blockcopy->vendor_string.length);
+		return false;
+	}
+	if(0 == block->vendor_string.entry || 0 == blockcopy->vendor_string.entry) {
+		if(block->vendor_string.entry != blockcopy->vendor_string.entry) {
+			printf("FAILED, vendor_string.entry mismatch\n");
+			return false;
+		}
+	}
+	else if(0 != memcmp(blockcopy->vendor_string.entry, block->vendor_string.entry, block->vendor_string.length)) {
+		printf("FAILED, vendor_string.entry mismatch\n");
+		return false;
+	}
+	if(blockcopy->num_comments != block->num_comments) {
+		printf("FAILED, num_comments mismatch, expected %u, got %u\n", block->num_comments, blockcopy->num_comments);
+		return false;
+	}
+	for(i = 0; i < block->num_comments; i++) {
+		if(blockcopy->comments[i].length != block->comments[i].length) {
+			printf("FAILED, comments[%u].length mismatch, expected %u, got %u\n", i, block->comments[i].length, blockcopy->comments[i].length);
+			return false;
+		}
+		if(0 == block->comments[i].entry || 0 == blockcopy->comments[i].entry) {
+			if(block->comments[i].entry != blockcopy->comments[i].entry) {
+				printf("FAILED, comments[%u].entry mismatch\n", i);
+				return false;
+			}
+		}
+		else {
+			if(0 != memcmp(blockcopy->comments[i].entry, block->comments[i].entry, block->comments[i].length)) {
+				printf("FAILED, comments[%u].entry mismatch\n", i);
+				return false;
+			}
+		}
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_cuesheet(const FLAC__StreamMetadata_CueSheet *block, const FLAC__StreamMetadata_CueSheet *blockcopy)
+{
+	uint32_t i, j;
+
+	if(0 != strcmp(blockcopy->media_catalog_number, block->media_catalog_number)) {
+		printf("FAILED, media_catalog_number mismatch, expected %s, got %s\n", block->media_catalog_number, blockcopy->media_catalog_number);
+		return false;
+	}
+	if(blockcopy->lead_in != block->lead_in) {
+		printf("FAILED, lead_in mismatch, expected %" PRIu64 ", got %" PRIu64 "\n", block->lead_in, blockcopy->lead_in);
+		return false;
+	}
+	if(blockcopy->is_cd != block->is_cd) {
+		printf("FAILED, is_cd mismatch, expected %u, got %u\n", (uint32_t)block->is_cd, (uint32_t)blockcopy->is_cd);
+		return false;
+	}
+	if(blockcopy->num_tracks != block->num_tracks) {
+		printf("FAILED, num_tracks mismatch, expected %u, got %u\n", block->num_tracks, blockcopy->num_tracks);
+		return false;
+	}
+	for(i = 0; i < block->num_tracks; i++) {
+		if(blockcopy->tracks[i].offset != block->tracks[i].offset) {
+			printf("FAILED, tracks[%u].offset mismatch, expected %" PRIu64 ", got %" PRIu64 "\n", i, block->tracks[i].offset, blockcopy->tracks[i].offset);
+			return false;
+		}
+		if(blockcopy->tracks[i].number != block->tracks[i].number) {
+			printf("FAILED, tracks[%u].number mismatch, expected %u, got %u\n", i, (uint32_t)block->tracks[i].number, (uint32_t)blockcopy->tracks[i].number);
+			return false;
+		}
+		if(blockcopy->tracks[i].num_indices != block->tracks[i].num_indices) {
+			printf("FAILED, tracks[%u].num_indices mismatch, expected %u, got %u\n", i, (uint32_t)block->tracks[i].num_indices, (uint32_t)blockcopy->tracks[i].num_indices);
+			return false;
+		}
+		/* num_indices == 0 means lead-out track so only the track offset and number are valid */
+		if(block->tracks[i].num_indices > 0) {
+			if(0 != strcmp(blockcopy->tracks[i].isrc, block->tracks[i].isrc)) {
+				printf("FAILED, tracks[%u].isrc mismatch, expected %s, got %s\n", i, block->tracks[i].isrc, blockcopy->tracks[i].isrc);
+				return false;
+			}
+			if(blockcopy->tracks[i].type != block->tracks[i].type) {
+				printf("FAILED, tracks[%u].type mismatch, expected %u, got %u\n", i, (uint32_t)block->tracks[i].type, (uint32_t)blockcopy->tracks[i].type);
+				return false;
+			}
+			if(blockcopy->tracks[i].pre_emphasis != block->tracks[i].pre_emphasis) {
+				printf("FAILED, tracks[%u].pre_emphasis mismatch, expected %u, got %u\n", i, (uint32_t)block->tracks[i].pre_emphasis, (uint32_t)blockcopy->tracks[i].pre_emphasis);
+				return false;
+			}
+			if(0 == block->tracks[i].indices || 0 == blockcopy->tracks[i].indices) {
+				if(block->tracks[i].indices != blockcopy->tracks[i].indices) {
+					printf("FAILED, tracks[%u].indices mismatch\n", i);
+					return false;
+				}
+			}
+			else {
+				for(j = 0; j < block->tracks[i].num_indices; j++) {
+					if(blockcopy->tracks[i].indices[j].offset != block->tracks[i].indices[j].offset) {
+						printf("FAILED, tracks[%u].indices[%u].offset mismatch, expected %" PRIu64 ", got %" PRIu64 "\n", i, j, block->tracks[i].indices[j].offset, blockcopy->tracks[i].indices[j].offset);
+						return false;
+					}
+					if(blockcopy->tracks[i].indices[j].number != block->tracks[i].indices[j].number) {
+						printf("FAILED, tracks[%u].indices[%u].number mismatch, expected %u, got %u\n", i, j, (uint32_t)block->tracks[i].indices[j].number, (uint32_t)blockcopy->tracks[i].indices[j].number);
+						return false;
+					}
+				}
+			}
+		}
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_picture(const FLAC__StreamMetadata_Picture *block, const FLAC__StreamMetadata_Picture *blockcopy)
+{
+	size_t len, lencopy;
+	if(blockcopy->type != block->type) {
+		printf("FAILED, type mismatch, expected %u, got %u\n", (uint32_t)block->type, (uint32_t)blockcopy->type);
+		return false;
+	}
+	len = strlen(block->mime_type);
+	lencopy = strlen(blockcopy->mime_type);
+	if(lencopy != len) {
+		printf("FAILED, mime_type length mismatch, expected %u, got %u\n", (uint32_t)len, (uint32_t)lencopy);
+		return false;
+	}
+	if(strcmp(blockcopy->mime_type, block->mime_type)) {
+		printf("FAILED, mime_type mismatch, expected %s, got %s\n", block->mime_type, blockcopy->mime_type);
+		return false;
+	}
+	len = strlen((const char *)block->description);
+	lencopy = strlen((const char *)blockcopy->description);
+	if(lencopy != len) {
+		printf("FAILED, description length mismatch, expected %u, got %u\n", (uint32_t)len, (uint32_t)lencopy);
+		return false;
+	}
+	if(strcmp((const char *)blockcopy->description, (const char *)block->description)) {
+		printf("FAILED, description mismatch, expected %s, got %s\n", block->description, blockcopy->description);
+		return false;
+	}
+	if(blockcopy->width != block->width) {
+		printf("FAILED, width mismatch, expected %u, got %u\n", block->width, blockcopy->width);
+		return false;
+	}
+	if(blockcopy->height != block->height) {
+		printf("FAILED, height mismatch, expected %u, got %u\n", block->height, blockcopy->height);
+		return false;
+	}
+	if(blockcopy->depth != block->depth) {
+		printf("FAILED, depth mismatch, expected %u, got %u\n", block->depth, blockcopy->depth);
+		return false;
+	}
+	if(blockcopy->colors != block->colors) {
+		printf("FAILED, colors mismatch, expected %u, got %u\n", block->colors, blockcopy->colors);
+		return false;
+	}
+	if(blockcopy->data_length != block->data_length) {
+		printf("FAILED, data_length mismatch, expected %u, got %u\n", block->data_length, blockcopy->data_length);
+		return false;
+	}
+	if(block->data_length > 0 && memcmp(blockcopy->data, block->data, block->data_length)) {
+		printf("FAILED, data mismatch\n");
+		return false;
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block_data_unknown(const FLAC__StreamMetadata_Unknown *block, const FLAC__StreamMetadata_Unknown *blockcopy, uint32_t block_length)
+{
+	if(0 == block->data || 0 == blockcopy->data) {
+		if(block->data != blockcopy->data) {
+			printf("FAILED, data mismatch (%s's data pointer is null)\n", 0==block->data?"original":"copy");
+			return false;
+		}
+		else if(block_length > 0) {
+			printf("FAILED, data pointer is null but block length is not 0\n");
+			return false;
+		}
+	}
+	else {
+		if(block_length == 0) {
+			printf("FAILED, data pointer is not null but block length is 0\n");
+			return false;
+		}
+		else if(0 != memcmp(blockcopy->data, block->data, block_length)) {
+			printf("FAILED, data mismatch\n");
+			return false;
+		}
+	}
+	return true;
+}
+
+FLAC__bool mutils__compare_block(const FLAC__StreamMetadata *block, const FLAC__StreamMetadata *blockcopy)
+{
+	if(blockcopy->type != block->type) {
+		printf("FAILED, type mismatch, expected %s, got %s\n", FLAC__MetadataTypeString[block->type], FLAC__MetadataTypeString[blockcopy->type]);
+		return false;
+	}
+	if(blockcopy->is_last != block->is_last) {
+		printf("FAILED, is_last mismatch, expected %u, got %u\n", (uint32_t)block->is_last, (uint32_t)blockcopy->is_last);
+		return false;
+	}
+	if(blockcopy->length != block->length) {
+		printf("FAILED, length mismatch, expected %u, got %u\n", block->length, blockcopy->length);
+		return false;
+	}
+	switch(block->type) {
+		case FLAC__METADATA_TYPE_STREAMINFO:
+			return mutils__compare_block_data_streaminfo(&block->data.stream_info, &blockcopy->data.stream_info);
+		case FLAC__METADATA_TYPE_PADDING:
+			return mutils__compare_block_data_padding(&block->data.padding, &blockcopy->data.padding, block->length);
+		case FLAC__METADATA_TYPE_APPLICATION:
+			return mutils__compare_block_data_application(&block->data.application, &blockcopy->data.application, block->length);
+		case FLAC__METADATA_TYPE_SEEKTABLE:
+			return mutils__compare_block_data_seektable(&block->data.seek_table, &blockcopy->data.seek_table);
+		case FLAC__METADATA_TYPE_VORBIS_COMMENT:
+			return mutils__compare_block_data_vorbiscomment(&block->data.vorbis_comment, &blockcopy->data.vorbis_comment);
+		case FLAC__METADATA_TYPE_CUESHEET:
+			return mutils__compare_block_data_cuesheet(&block->data.cue_sheet, &blockcopy->data.cue_sheet);
+		case FLAC__METADATA_TYPE_PICTURE:
+			return mutils__compare_block_data_picture(&block->data.picture, &blockcopy->data.picture);
+		default:
+			return mutils__compare_block_data_unknown(&block->data.unknown, &blockcopy->data.unknown, block->length);
+	}
+}
+
+static void *malloc_or_die_(size_t size)
+{
+	void *x = malloc(size);
+	if(0 == x) {
+		fprintf(stderr, "ERROR: out of memory allocating %u bytes\n", (uint32_t)size);
+		exit(1);
+	}
+	return x;
+}
+
+static void *calloc_or_die_(size_t n, size_t size)
+{
+	void *x = calloc(n, size);
+	if(0 == x) {
+		fprintf(stderr, "ERROR: out of memory allocating %u bytes\n", (uint32_t)n * (uint32_t)size);
+		exit(1);
+	}
+	return x;
+}
+
+static char *strdup_or_die_(const char *s)
+{
+	char *x = strdup(s);
+	if(0 == x) {
+		fprintf(stderr, "ERROR: out of memory copying string \"%s\"\n", s);
+		exit(1);
+	}
+	return x;
+}
+
+void mutils__init_metadata_blocks(
+	FLAC__StreamMetadata *streaminfo,
+	FLAC__StreamMetadata *padding,
+	FLAC__StreamMetadata *seektable,
+	FLAC__StreamMetadata *application1,
+	FLAC__StreamMetadata *application2,
+	FLAC__StreamMetadata *vorbiscomment,
+	FLAC__StreamMetadata *cuesheet,
+	FLAC__StreamMetadata *picture,
+	FLAC__StreamMetadata *unknown
+)
+{
+	/*
+		most of the actual numbers and data in the blocks don't matter,
+		we just want to make sure the decoder parses them correctly
+
+		remember, the metadata interface gets tested after the decoders,
+		so we do all the metadata manipulation here without it.
+	*/
+
+	/* min/max_framesize and md5sum don't get written at first, so we have to leave them 0 */
+	streaminfo->is_last = false;
+	streaminfo->type = FLAC__METADATA_TYPE_STREAMINFO;
+	streaminfo->length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
+	streaminfo->data.stream_info.min_blocksize = 576;
+	streaminfo->data.stream_info.max_blocksize = 576;
+	streaminfo->data.stream_info.min_framesize = 0;
+	streaminfo->data.stream_info.max_framesize = 0;
+	streaminfo->data.stream_info.sample_rate = 44100;
+	streaminfo->data.stream_info.channels = 1;
+	streaminfo->data.stream_info.bits_per_sample = 8;
+	streaminfo->data.stream_info.total_samples = 0;
+	memset(streaminfo->data.stream_info.md5sum, 0, 16);
+
+	padding->is_last = false;
+	padding->type = FLAC__METADATA_TYPE_PADDING;
+	padding->length = 1234;
+
+	seektable->is_last = false;
+	seektable->type = FLAC__METADATA_TYPE_SEEKTABLE;
+	seektable->data.seek_table.num_points = 2;
+	seektable->length = seektable->data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
+	seektable->data.seek_table.points = malloc_or_die_(seektable->data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint));
+	seektable->data.seek_table.points[0].sample_number = 0;
+	seektable->data.seek_table.points[0].stream_offset = 0;
+	seektable->data.seek_table.points[0].frame_samples = streaminfo->data.stream_info.min_blocksize;
+	seektable->data.seek_table.points[1].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
+	seektable->data.seek_table.points[1].stream_offset = 1000;
+	seektable->data.seek_table.points[1].frame_samples = streaminfo->data.stream_info.min_blocksize;
+
+	application1->is_last = false;
+	application1->type = FLAC__METADATA_TYPE_APPLICATION;
+	application1->length = 8;
+	memcpy(application1->data.application.id, "This", 4);
+	application1->data.application.data = malloc_or_die_(4);
+	memcpy(application1->data.application.data, "\xf0\xe1\xd2\xc3", 4);
+
+	application2->is_last = false;
+	application2->type = FLAC__METADATA_TYPE_APPLICATION;
+	application2->length = 4;
+	memcpy(application2->data.application.id, "Here", 4);
+	application2->data.application.data = 0;
+
+	{
+		const uint32_t vendor_string_length = (uint32_t)strlen(FLAC__VENDOR_STRING);
+		vorbiscomment->is_last = false;
+		vorbiscomment->type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
+		vorbiscomment->length = (4 + vendor_string_length) + 4 + (4 + 5) + (4 + 0);
+		vorbiscomment->data.vorbis_comment.vendor_string.length = vendor_string_length;
+		vorbiscomment->data.vorbis_comment.vendor_string.entry = malloc_or_die_(vendor_string_length+1);
+		memcpy(vorbiscomment->data.vorbis_comment.vendor_string.entry, FLAC__VENDOR_STRING, vendor_string_length+1);
+		vorbiscomment->data.vorbis_comment.num_comments = 2;
+		vorbiscomment->data.vorbis_comment.comments = malloc_or_die_(vorbiscomment->data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry));
+		vorbiscomment->data.vorbis_comment.comments[0].length = 5;
+		vorbiscomment->data.vorbis_comment.comments[0].entry = malloc_or_die_(5+1);
+		memcpy(vorbiscomment->data.vorbis_comment.comments[0].entry, "ab=cd", 5+1);
+		vorbiscomment->data.vorbis_comment.comments[1].length = 0;
+		vorbiscomment->data.vorbis_comment.comments[1].entry = malloc_or_die_(1);
+		vorbiscomment->data.vorbis_comment.comments[1].entry[0] = '\0';
+	}
+
+	cuesheet->is_last = false;
+	cuesheet->type = FLAC__METADATA_TYPE_CUESHEET;
+	cuesheet->length =
+		/* cuesheet guts */
+		(
+			FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN
+		) / 8 +
+		/* 2 tracks */
+		3 * (
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN
+		) / 8 +
+		/* 3 index points */
+		3 * (
+			FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN +
+			FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN
+		) / 8
+	;
+	memset(cuesheet->data.cue_sheet.media_catalog_number, 0, sizeof(cuesheet->data.cue_sheet.media_catalog_number));
+	cuesheet->data.cue_sheet.media_catalog_number[0] = 'j';
+	cuesheet->data.cue_sheet.media_catalog_number[1] = 'C';
+	cuesheet->data.cue_sheet.lead_in = 2 * 44100;
+	cuesheet->data.cue_sheet.is_cd = true;
+	cuesheet->data.cue_sheet.num_tracks = 3;
+	cuesheet->data.cue_sheet.tracks = calloc_or_die_(cuesheet->data.cue_sheet.num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track));
+	cuesheet->data.cue_sheet.tracks[0].offset = 0;
+	cuesheet->data.cue_sheet.tracks[0].number = 1;
+	memcpy(cuesheet->data.cue_sheet.tracks[0].isrc, "ACBDE1234567", sizeof(cuesheet->data.cue_sheet.tracks[0].isrc));
+	cuesheet->data.cue_sheet.tracks[0].type = 0;
+	cuesheet->data.cue_sheet.tracks[0].pre_emphasis = 1;
+	cuesheet->data.cue_sheet.tracks[0].num_indices = 2;
+	cuesheet->data.cue_sheet.tracks[0].indices = malloc_or_die_(cuesheet->data.cue_sheet.tracks[0].num_indices * sizeof(FLAC__StreamMetadata_CueSheet_Index));
+	cuesheet->data.cue_sheet.tracks[0].indices[0].offset = 0;
+	cuesheet->data.cue_sheet.tracks[0].indices[0].number = 0;
+	cuesheet->data.cue_sheet.tracks[0].indices[1].offset = 123 * 588;
+	cuesheet->data.cue_sheet.tracks[0].indices[1].number = 1;
+	cuesheet->data.cue_sheet.tracks[1].offset = 1234 * 588;
+	cuesheet->data.cue_sheet.tracks[1].number = 2;
+	memcpy(cuesheet->data.cue_sheet.tracks[1].isrc, "ACBDE7654321", sizeof(cuesheet->data.cue_sheet.tracks[1].isrc));
+	cuesheet->data.cue_sheet.tracks[1].type = 1;
+	cuesheet->data.cue_sheet.tracks[1].pre_emphasis = 0;
+	cuesheet->data.cue_sheet.tracks[1].num_indices = 1;
+	cuesheet->data.cue_sheet.tracks[1].indices = malloc_or_die_(cuesheet->data.cue_sheet.tracks[1].num_indices * sizeof(FLAC__StreamMetadata_CueSheet_Index));
+	cuesheet->data.cue_sheet.tracks[1].indices[0].offset = 0;
+	cuesheet->data.cue_sheet.tracks[1].indices[0].number = 1;
+	cuesheet->data.cue_sheet.tracks[2].offset = 12345 * 588;
+	cuesheet->data.cue_sheet.tracks[2].number = 170;
+	cuesheet->data.cue_sheet.tracks[2].num_indices = 0;
+
+	picture->is_last = false;
+	picture->type = FLAC__METADATA_TYPE_PICTURE;
+	picture->length =
+		(
+			FLAC__STREAM_METADATA_PICTURE_TYPE_LEN +
+			FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN + /* will add the length for the string later */
+			FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN + /* will add the length for the string later */
+			FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN +
+			FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN +
+			FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN +
+			FLAC__STREAM_METADATA_PICTURE_COLORS_LEN +
+			FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN /* will add the length for the data later */
+		) / 8
+	;
+	picture->data.picture.type = FLAC__STREAM_METADATA_PICTURE_TYPE_FRONT_COVER;
+	picture->data.picture.mime_type = strdup_or_die_("image/jpeg");
+	picture->length += strlen(picture->data.picture.mime_type);
+	picture->data.picture.description = (FLAC__byte*)strdup_or_die_("desc");
+	picture->length += strlen((const char *)picture->data.picture.description);
+	picture->data.picture.width = 300;
+	picture->data.picture.height = 300;
+	picture->data.picture.depth = 24;
+	picture->data.picture.colors = 0;
+	picture->data.picture.data = (FLAC__byte*)strdup_or_die_("SOMEJPEGDATA");
+	picture->data.picture.data_length = strlen((const char *)picture->data.picture.data);
+	picture->length += picture->data.picture.data_length;
+
+	unknown->is_last = true;
+	unknown->type = 126;
+	unknown->length = 8;
+	unknown->data.unknown.data = malloc_or_die_(unknown->length);
+	memcpy(unknown->data.unknown.data, "\xfe\xdc\xba\x98\xf0\xe1\xd2\xc3", unknown->length);
+}
+
+void mutils__free_metadata_blocks(
+	FLAC__StreamMetadata *streaminfo,
+	FLAC__StreamMetadata *padding,
+	FLAC__StreamMetadata *seektable,
+	FLAC__StreamMetadata *application1,
+	FLAC__StreamMetadata *application2,
+	FLAC__StreamMetadata *vorbiscomment,
+	FLAC__StreamMetadata *cuesheet,
+	FLAC__StreamMetadata *picture,
+	FLAC__StreamMetadata *unknown
+)
+{
+	(void)streaminfo, (void)padding, (void)application2;
+	free(seektable->data.seek_table.points);
+	free(application1->data.application.data);
+	free(vorbiscomment->data.vorbis_comment.vendor_string.entry);
+	free(vorbiscomment->data.vorbis_comment.comments[0].entry);
+	free(vorbiscomment->data.vorbis_comment.comments);
+	free(cuesheet->data.cue_sheet.tracks[0].indices);
+	free(cuesheet->data.cue_sheet.tracks[1].indices);
+	free(cuesheet->data.cue_sheet.tracks);
+	free(picture->data.picture.mime_type);
+	free(picture->data.picture.description);
+	free(picture->data.picture.data);
+	free(unknown->data.unknown.data);
+}