add --import-picture command to metaflac

doc/html/changelog.html

@@ -68,6 +68,7 @@
 					<li>Large file (&gt;2GB) support everywhere</li>
 					<li>Much better recovery for corrupted files</li>
 					<li><span class="commandname">flac</span> now supports FLAC as input to the encoder (i.e. can re-encode FLAC to FLAC) and preserve all the metadata like tags, etc.</li>
+					<li>New <a href="format.html#def_PICTURE"><span class="code">PICTURE</span></a> metadata block for storing things like cover art, new <span class="argument"><a href="documentation.html#flac_options_picture">--picture</a></span> option to <span class="commandname">flac</span> and <span class="argument"><a href="documentation.html#metaflac_shorthand_import_picture">--import-picture</a></span> option to <span class="commandname">metaflac</span> for importing pictures, and metadata API <a href="api/group__flac__metadata__level0.html#ga3">additions</a> for searching for suitable pictures based on type, size and color constraints.</li>
 					<li>Support for new <tt>REPLAYGAIN_REFERENCE_LOUDNESS</tt> tag.</li>
 					<li>In the developer libraries, the interface has been simplfied by merging the three decoding layers into a single class; ditto for the encoders.</li>
 				</ul>

doc/html/documentation.html

@@ -1230,6 +1230,15 @@
 					Export <span class="code">CUESHEET</span> block to a cuesheet file, suitable for use by CD authoring software.  Use '-' for stdout.  Only one FLAC file may be specified on the command line.
 				</td>
 			</tr>
+			<tr>
+				<td nowrap="nowrap" align="right" valign="top" bgcolor="#F4F4CC">
+					<a name="metaflac_shorthand_import_picture" />
+					<span class="argument">--import-picture=SPECIFICATION</span>
+				</td>
+				<td>
+					Import a picture and store it in a <a href="format.html#def_PICTURE"><span class="code">PICTURE</span></a> metadata block.  See the <span class="commandname">flac</span> option <span class="argument"><a href="#flac_options_picture">--picture</a></span> for an explanation of the <span class="argument">SPECIFICATION</span> syntax.
+				</td>
+			</tr>
 			<tr>
 				<td nowrap="nowrap" align="right" valign="top" bgcolor="#F4F4CC">
 					<a name="metaflac_shorthand_add_replay_gain" />

man/metaflac.sgml

@@ -300,6 +300,48 @@ manpage.1: manpage.sgml
 	  </para>
         </listitem>
       </varlistentry>
+      <varlistentry>
+	<term><option>--import-picture</option>=<replaceable>SPECIFICATION</replaceable></term>
+	<listitem>
+	  <para>Import a picture and store it in a PICTURE metadata block.  More than one --import-picture command can be specified.  The SPECIFICATION is a string whose parts are separated by | (pipe) characters.  Some parts may be left empty to invoke default values.  The format of SPECIFICATION is</para>
+	  <para>[TYPE]|MIME-TYPE|[DESCRIPTION]|[WIDTHxHEIGHTxDEPTH[/COLORS]]|FILE</para>
+	  <para>TYPE is optional; it is a number from one of:</para>
+	  <para>0: Other</para>
+	  <para>1: 32x32 pixels 'file icon' (PNG only)</para>
+	  <para>2: Other file icon</para>
+	  <para>3: Cover (front)</para>
+	  <para>4: Cover (back)</para>
+	  <para>5: Leaflet page</para>
+	  <para>6: Media (e.g. label side of CD)</para>
+	  <para>7: Lead artist/lead performer/soloist</para>
+	  <para>8: Artist/performer</para>
+	  <para>9: Conductor</para>
+	  <para>10: Band/Orchestra</para>
+	  <para>11: Composer</para>
+	  <para>12: Lyricist/text writer</para>
+	  <para>13: Recording Location</para>
+	  <para>14: During recording</para>
+	  <para>15: During performance</para>
+	  <para>16: Movie/video screen capture</para>
+	  <para>17: A bright coloured fish</para>
+	  <para>18: Illustration</para>
+	  <para>19: Band/artist logotype</para>
+	  <para>20: Publisher/Studio logotype</para>
+	  <para>The default is 3 (front cover).  There may only be one picture each of type 1 and 2 in a file.</para>
+
+	  <para>MIME-TYPE is mandatory; for best compatibility with players, use pictures with MIME type image/jpeg or image/png.  The MIME type can also be --&gt; to mean that FILE is actually a URL to an image, though this use is discouraged.</para>
+
+	  <para>DESCRIPTION is optional; the default is an empty string.</para>
+
+	  <para>The next part specfies the resolution and color information.  If the MIME-TYPE is image/jpeg, image/png, or image/gif, you can usually leave this empty and they can be detected from the file.  Otherwise, you must specify the width in pixels, height in pixels, and color depth in bits-per-pixel.  If the image has indexed colors you should also specify the number of colors used.  When manually specified, it is not checked against the file for accuracy.</para>
+
+	  <para>FILE is the path to the picture file to be imported, or the URL if MIME type is --&gt;</para>
+
+	  <para>For example, "|image/jpeg|||../cover.jpg" will embed the JPEG file at ../cover.jpg, defaulting to type 3 (front cover) and an empty description.  The resolution and color info will be retrieved from the file itself.</para>
+
+	  <para>The specification "4|-->|CD|320x300x24/173|http://blah.blah/backcover.tiff" will embed the given URL, with type 4 (back cover), description "CD", and a manually specified resolution of 320x300, 24 bits-per-pixel, and 173 colors.  The file at the URL will not be fetched; the URL itself is stored in the PICTURE metadata block.</para>
+	</listitem>
+      </varlistentry>
       <varlistentry>
 	<term><option>--add-replay-gain</option></term>
         <listitem>

src/metaflac/Makefile.am

@@ -25,6 +25,7 @@ metaflac_SOURCES = \
 	main.c \
 	operations.c \
 	operations_shorthand_cuesheet.c \
+	operations_shorthand_picture.c \
 	operations_shorthand_seektable.c \
 	operations_shorthand_streaminfo.c \
 	operations_shorthand_vorbiscomment.c \

src/metaflac/Makefile.lite

@@ -36,6 +36,7 @@ SRCS_C = \
 	main.c \
 	operations.c \
 	operations_shorthand_cuesheet.c \
+	operations_shorthand_picture.c \
 	operations_shorthand_seektable.c \
 	operations_shorthand_streaminfo.c \
 	operations_shorthand_vorbiscomment.c \

src/metaflac/metaflac.dsp

@@ -101,6 +101,10 @@ SOURCE=.\operations_shorthand_cuesheet.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\operations_shorthand_picture.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\operations_shorthand_seektable.c
 # End Source File
 # Begin Source File

src/metaflac/operations.c

@@ -58,6 +58,9 @@ extern FLAC__bool do_shorthand_operation__vorbis_comment(const char *filename, F
 /* from operations_shorthand_cuesheet.c */
 extern FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write);
 
+/* from operations_shorthand_picture.c */
+extern FLAC__bool do_shorthand_operation__picture(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write);
+
 
 FLAC__bool do_operations(const CommandLineOptions *options)
 {
@@ -356,6 +359,9 @@ FLAC__bool do_shorthand_operation(const char *filename, FLAC__bool prefix_with_f
 		case OP__EXPORT_CUESHEET_TO:
 			ok = do_shorthand_operation__cuesheet(filename, chain, operation, needs_write);
 			break;
+		case OP__IMPORT_PICTURE:
+			ok = do_shorthand_operation__picture(filename, chain, operation, needs_write);
+			break;
 		case OP__ADD_SEEKPOINT:
 			ok = do_shorthand_operation__add_seekpoints(filename, chain, operation->argument.add_seekpoint.specification, needs_write);
 			break;

src/metaflac/operations_shorthand_picture.c

+/* metaflac - Command-line FLAC metadata editor
+ * Copyright (C) 2001,2002,2003,2004,2005,2006  Josh Coalson
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#if HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdio.h> /* for snprintf() */
+#include <string.h>
+#include "options.h"
+#include "utils.h"
+#include "FLAC/assert.h"
+#include "share/grabbag.h" /* for grabbag__picture_parse_specification */
+
+static FLAC__bool import_pic_from(const char *filename, FLAC__StreamMetadata **picture, const char *specification, FLAC__bool *needs_write);
+
+FLAC__bool do_shorthand_operation__picture(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
+{
+	FLAC__bool ok = true, has_type1 = false, has_type2 = false;
+	FLAC__StreamMetadata *picture = 0;
+	FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
+
+	if(0 == iterator)
+		die("out of memory allocating iterator");
+
+	FLAC__metadata_iterator_init(iterator, chain);
+
+	switch(operation->type) {
+		case OP__IMPORT_PICTURE:
+			ok = import_pic_from(filename, &picture, operation->argument.specification.value, needs_write);
+			if(ok) {
+				/* append PICTURE block */
+				while(FLAC__metadata_iterator_next(iterator))
+					;
+				if(!FLAC__metadata_iterator_insert_block_after(iterator, picture)) {
+					print_error_with_chain_status(chain, "%s: ERROR: adding new PICTURE block to metadata", filename);
+					FLAC__metadata_object_delete(picture);
+					ok = false;
+				}
+			}
+			break;
+		default:
+			ok = false;
+			FLAC__ASSERT(0);
+			break;
+	};
+
+	/* check global PICTURE constraints (max 1 block each of type=1 and type=2) */
+	while(FLAC__metadata_iterator_prev(iterator))
+		;
+	do {
+		FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
+		if(block->type == FLAC__METADATA_TYPE_PICTURE) {
+			if(block->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
+				if(has_type1) {
+					print_error_with_chain_status(chain, "%s: ERROR: FLAC stream can only have one 32x32 standard icon (type=1) PICTURE block", filename);
+					ok = false;
+				}
+				has_type1 = true;
+			}
+			else if(block->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
+				if(has_type2) {
+					print_error_with_chain_status(chain, "%s: ERROR: FLAC stream can only have one icon (type=2) PICTURE block", filename);
+					ok = false;
+				}
+				has_type2 = true;
+			}
+		}
+	} while(FLAC__metadata_iterator_next(iterator));
+
+
+	FLAC__metadata_iterator_delete(iterator);
+	return ok;
+}
+
+/*
+ * local routines
+ */
+
+FLAC__bool import_pic_from(const char *filename, FLAC__StreamMetadata **picture, const char *specification, FLAC__bool *needs_write)
+{
+	const char *error_message;
+
+	if(0 == specification || strlen(specification) == 0) {
+		fprintf(stderr, "%s: ERROR: empty picture specification\n", filename);
+		return false;
+	}
+
+	*picture = grabbag__picture_parse_specification(specification, &error_message);
+
+	if(0 == *picture) {
+		fprintf(stderr, "%s: ERROR: while parsing picture specification \"%s\": %s\n", filename, specification, error_message);
+		return false;
+	}
+
+	if(!FLAC__format_picture_is_legal(&(*picture)->data.picture, &error_message)) {
+		fprintf(stderr, "%s: ERROR: new PICTURE block for \"%s\" is illegal: %s\n", filename, specification, error_message);
+		return false;
+	}
+
+	*needs_write = true;
+	return true;
+}

src/metaflac/operations_shorthand_vorbiscomment.c

@@ -33,8 +33,8 @@ static FLAC__bool remove_vc_all(const char *filename, FLAC__StreamMetadata *bloc
 static FLAC__bool remove_vc_field(const char *filename, FLAC__StreamMetadata *block, const char *field_name, FLAC__bool *needs_write);
 static FLAC__bool remove_vc_firstfield(const char *filename, FLAC__StreamMetadata *block, const char *field_name, FLAC__bool *needs_write);
 static FLAC__bool set_vc_field(const char *filename, FLAC__StreamMetadata *block, const Argument_VcField *field, FLAC__bool *needs_write, FLAC__bool raw);
-static FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool *needs_write, FLAC__bool raw);
-static FLAC__bool export_vc_to(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool raw);
+static FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, const Argument_String *vc_filename, FLAC__bool *needs_write, FLAC__bool raw);
+static FLAC__bool export_vc_to(const char *filename, FLAC__StreamMetadata *block, const Argument_String *vc_filename, FLAC__bool raw);
 
 FLAC__bool do_shorthand_operation__vorbis_comment(const char *filename, FLAC__bool prefix_with_filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write, FLAC__bool raw)
 {
@@ -280,7 +280,7 @@ FLAC__bool set_vc_field(const char *filename, FLAC__StreamMetadata *block, const
 	}
 }
 
-FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool *needs_write, FLAC__bool raw)
+FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, const Argument_String *vc_filename, FLAC__bool *needs_write, FLAC__bool raw)
 {
 	FILE *f;
 	char line[65536];
@@ -338,7 +338,7 @@ FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, con
 	return ret;
 }
 
-FLAC__bool export_vc_to(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool raw)
+FLAC__bool export_vc_to(const char *filename, FLAC__StreamMetadata *block, const Argument_String *vc_filename, FLAC__bool raw)
 {
 	FILE *f;
 	FLAC__bool ret;

src/metaflac/options.c

@@ -80,6 +80,7 @@ struct share__option long_options_[] = {
 	{ "export-vc-to", 1, 0, 0 }, /* deprecated */
 	{ "import-cuesheet-from", 1, 0, 0 },
 	{ "export-cuesheet-to", 1, 0, 0 },
+	{ "import-picture", 1, 0, 0 },
 	{ "add-seekpoint", 1, 0, 0 },
 	{ "add-replay-gain", 0, 0, 0 },
 	{ "remove-replay-gain", 0, 0, 0 },
@@ -113,7 +114,7 @@ static Argument *append_argument(CommandLineOptions *options, ArgumentType type)
 static FLAC__bool parse_md5(const char *src, FLAC__byte dest[16]);
 static FLAC__bool parse_uint32(const char *src, FLAC__uint32 *dest);
 static FLAC__bool parse_uint64(const char *src, FLAC__uint64 *dest);
-static FLAC__bool parse_filename(const char *src, char **dest);
+static FLAC__bool parse_string(const char *src, char **dest);
 static FLAC__bool parse_vorbis_comment_field_name(const char *field_ref, char **name, const char **violation);
 static FLAC__bool parse_add_seekpoint(const char *in, char **out, const char **violation);
 static FLAC__bool parse_add_padding(const char *in, unsigned *out);
@@ -274,6 +275,10 @@ void free_options(CommandLineOptions *options)
 				if(0 != op->argument.import_cuesheet_from.filename)
 					free(op->argument.import_cuesheet_from.filename);
 				break;
+			case OP__IMPORT_PICTURE:
+				if(0 != op->argument.specification.value)
+					free(op->argument.specification.value);
+				break;
 			case OP__ADD_SEEKPOINT:
 				if(0 != op->argument.add_seekpoint.specification)
 					free(op->argument.add_seekpoint.specification);
@@ -531,7 +536,7 @@ FLAC__bool parse_option(int option_index, const char *option_argument, CommandLi
 			fprintf(stderr, "WARNING: --%s is deprecated, the new name is --import-tags-from\n", opt);
 		op = append_shorthand_operation(options, OP__IMPORT_VC_FROM);
 		FLAC__ASSERT(0 != option_argument);
-		if(!parse_filename(option_argument, &(op->argument.filename.value))) {
+		if(!parse_string(option_argument, &(op->argument.filename.value))) {
 			fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 			ok = false;
 		}
@@ -541,7 +546,7 @@ FLAC__bool parse_option(int option_index, const char *option_argument, CommandLi
 			fprintf(stderr, "WARNING: --%s is deprecated, the new name is --export-tags-to\n", opt);
 		op = append_shorthand_operation(options, OP__EXPORT_VC_TO);
 		FLAC__ASSERT(0 != option_argument);
-		if(!parse_filename(option_argument, &(op->argument.filename.value))) {
+		if(!parse_string(option_argument, &(op->argument.filename.value))) {
 			fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 			ok = false;
 		}
@@ -553,7 +558,7 @@ FLAC__bool parse_option(int option_index, const char *option_argument, CommandLi
 		}
 		op = append_shorthand_operation(options, OP__IMPORT_CUESHEET_FROM);
 		FLAC__ASSERT(0 != option_argument);
-		if(!parse_filename(option_argument, &(op->argument.import_cuesheet_from.filename))) {
+		if(!parse_string(option_argument, &(op->argument.import_cuesheet_from.filename))) {
 			fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 			ok = false;
 		}
@@ -561,11 +566,19 @@ FLAC__bool parse_option(int option_index, const char *option_argument, CommandLi
 	else if(0 == strcmp(opt, "export-cuesheet-to")) {
 		op = append_shorthand_operation(options, OP__EXPORT_CUESHEET_TO);
 		FLAC__ASSERT(0 != option_argument);
-		if(!parse_filename(option_argument, &(op->argument.filename.value))) {
+		if(!parse_string(option_argument, &(op->argument.filename.value))) {
 			fprintf(stderr, "ERROR (--%s): missing filename\n", opt);
 			ok = false;
 		}
 	}
+	else if(0 == strcmp(opt, "import-picture")) {
+		op = append_shorthand_operation(options, OP__IMPORT_PICTURE);
+		FLAC__ASSERT(0 != option_argument);
+		if(!parse_string(option_argument, &(op->argument.specification.value))) {
+			fprintf(stderr, "ERROR (--%s): missing specification\n", opt);
+			ok = false;
+		}
+	}
 	else if(0 == strcmp(opt, "add-seekpoint")) {
 		const char *violation;
 		char *spec;
@@ -829,7 +842,7 @@ FLAC__bool parse_uint64(const char *src, FLAC__uint64 *dest)
 	return true;
 }
 
-FLAC__bool parse_filename(const char *src, char **dest)
+FLAC__bool parse_string(const char *src, char **dest)
 {
 	if(0 == src || strlen(src) == 0)
 		return false;
@@ -1024,6 +1037,9 @@ FLAC__bool parse_block_type(const char *in, Argument_BlockType *out)
 		else if(0 == strcmp(q, "CUESHEET")) {
 			out->entries[entry++].type = FLAC__METADATA_TYPE_CUESHEET;
 		}
+		else if(0 == strcmp(q, "PICTURE")) {
+			out->entries[entry++].type = FLAC__METADATA_TYPE_PICTURE;
+		}
 		else {
 			free(s);
 			return false;

src/metaflac/options.h

@@ -60,6 +60,7 @@ typedef enum {
 	OP__EXPORT_VC_TO,
 	OP__IMPORT_CUESHEET_FROM,
 	OP__EXPORT_CUESHEET_TO,
+	OP__IMPORT_PICTURE,
 	OP__ADD_SEEKPOINT,
 	OP__ADD_REPLAY_GAIN,
 	OP__ADD_PADDING,
@@ -106,7 +107,7 @@ typedef struct {
 
 typedef struct {
 	char *value;
-} Argument_Filename;
+} Argument_String;
 
 typedef struct {
 	unsigned num_entries;
@@ -153,7 +154,8 @@ typedef struct {
 		Argument_StreaminfoUInt64 streaminfo_uint64;
 		Argument_VcFieldName vc_field_name;
 		Argument_VcField vc_field;
-		Argument_Filename filename;
+		Argument_String filename;
+		Argument_String specification;
 		Argument_ImportCuesheetFrom import_cuesheet_from;
 		Argument_AddSeekpoint add_seekpoint;
 		Argument_AddPadding add_padding;

src/metaflac/usage.c

@@ -131,9 +131,9 @@ int long_usage(const char *message, ...)
 	fprintf(out, "                      Unless --no-utf8-convert is specified, the contents will\n");
 	fprintf(out, "                      be converted to UTF-8 from the local charset.  This can\n");
 	fprintf(out, "                      be used to store a cuesheet in a tag (e.g.\n");
-	fprintf(out, "                      --set-tag-from-file=\"CUESHEET=image.cue\").  Do not try to\n");
-	fprintf(out, "                      store binary data in tag fields!  Use APPLICATION blocks\n");
-	fprintf(out, "                      for that.\n");
+	fprintf(out, "                      --set-tag-from-file=\"CUESHEET=image.cue\").  Do not try\n");
+	fprintf(out, "                      to store binary data in tag fields!  Use APPLICATION\n");
+	fprintf(out, "                      blocks for that.\n");
 	fprintf(out, "--import-tags-from=FILE Import tags from a file.  Use '-' for stdin.  Each line\n");
 	fprintf(out, "                      should be of the form NAME=VALUE.  Multi-line comments\n");
 	fprintf(out, "                      are currently not supported.  Specify --remove-all-tags\n");
@@ -144,11 +144,53 @@ int long_usage(const char *message, ...)
 	fprintf(out, "                      --no-utf8-convert if necessary.\n");
 	fprintf(out, "--import-cuesheet-from=FILE  Import a cuesheet from a file.  Use '-' for stdin.\n");
 	fprintf(out, "                      Only one FLAC file may be specified.  A seekpoint will be\n");
-	fprintf(out, "                      added for each index point in the cuesheet to the SEEKTABLE\n");
-	fprintf(out, "                      unless --no-cued-seekpoints is specified.\n");
+	fprintf(out, "                      added for each index point in the cuesheet to the\n");
+	fprintf(out, "                      SEEKTABLE unless --no-cued-seekpoints is specified.\n");
 	fprintf(out, "--export-cuesheet-to=FILE  Export CUESHEET block to a cuesheet file, suitable\n");
 	fprintf(out, "                      for use by CD authoring software.  Use '-' for stdout.\n");
 	fprintf(out, "                      Only one FLAC file may be specified on the command line.\n");
+	fprintf(out, "--import-picture=SPECIFICATION Import a picture and store it in a PICTURE block.\n");
+	fprintf(out, "                      The SPECIFICATION is a string whose parts are separated\n");
+	fprintf(out, "                      by | characters.  Some parts may be left empty to invoke\n");
+	fprintf(out, "                      default values.  The specification format is:\n");
+	fprintf(out, "         [TYPE]|MIME-TYPE|[DESCRIPTION]|[WIDTHxHEIGHTxDEPTH[/COLORS]]|FILE\n");
+	fprintf(out, "           TYPE is optional; it is a number from one of:\n");
+	fprintf(out, "              0: Other\n");
+	fprintf(out, "              1: 32x32 pixels 'file icon' (PNG only)\n");
+	fprintf(out, "              2: Other file icon\n");
+	fprintf(out, "              3: Cover (front)\n");
+	fprintf(out, "              4: Cover (back)\n");
+	fprintf(out, "              5: Leaflet page\n");
+	fprintf(out, "              6: Media (e.g. label side of CD)\n");
+	fprintf(out, "              7: Lead artist/lead performer/soloist\n");
+	fprintf(out, "              8: Artist/performer\n");
+	fprintf(out, "              9: Conductor\n");
+	fprintf(out, "             10: Band/Orchestra\n");
+	fprintf(out, "             11: Composer\n");
+	fprintf(out, "             12: Lyricist/text writer\n");
+	fprintf(out, "             13: Recording Location\n");
+	fprintf(out, "             14: During recording\n");
+	fprintf(out, "             15: During performance\n");
+	fprintf(out, "             16: Movie/video screen capture\n");
+	fprintf(out, "             17: A bright coloured fish\n");
+	fprintf(out, "             18: Illustration\n");
+	fprintf(out, "             19: Band/artist logotype\n");
+	fprintf(out, "             20: Publisher/Studio logotype\n");
+	fprintf(out, "             The default is 3 (front cover).  There may only be one picture each\n");
+	fprintf(out, "             of type 1 and 2 in a file.\n");
+	fprintf(out, "           MIME-TYPE is mandatory; for best compatibility with players, use\n");
+	fprintf(out, "             pictures with MIME type image/jpeg or image/png.  The MIME type can\n");
+	fprintf(out, "             also be --> to mean that FILE is actually a URL to an image, though\n");
+	fprintf(out, "             this use is discouraged.\n");
+	fprintf(out, "           DESCRIPTION is optional; the default is an empty string\n");
+	fprintf(out, "           The next part specfies the resolution and color information.  If\n");
+	fprintf(out, "             the MIME-TYPE is image/jpeg, image/png, or image/gif, you can\n");
+	fprintf(out, "             usually leave this empty and they can be detected from the file.\n");
+	fprintf(out, "             Otherwise, you must specify the width in pixels, height in pixels,\n");
+	fprintf(out, "             and color depth in bits-per-pixel.  If the image has indexed colors\n");
+	fprintf(out, "             you should also specify the number of colors used.\n");
+	fprintf(out, "           FILE is the path to the picture file to be imported, or the URL if\n");
+	fprintf(out, "             MIME type is -->\n");
 	fprintf(out, "--add-replay-gain     Calculates the title and album gains/peaks of the given\n");
 	fprintf(out, "                      FLAC files as if all the files were part of one album,\n");
 	fprintf(out, "                      then stores them in the VORBIS_COMMENT block.  The tags\n");

test/metaflac-test-files/case46-expect.meta

+METADATA block #0
+  type: 0 (STREAMINFO)
+  is last: false
+  length: 34
+  sample_rate: 8000 Hz
+  channels: 1
+  bits-per-sample: 8
+  total samples: 80000
+  MD5 signature: a042237c5493fdb9656b94a83608d11a
+METADATA block #1
+  type: 3 (SEEKTABLE)
+  is last: false
+  length: 18
+  seek points: 1
+    point 0: sample_number=0
+METADATA block #2
+  type: 4 (VORBIS_COMMENT)
+  is last: false
+  length: 117
+  comments: 4
+    comment[0]: f=0123456789abcdefghij
+    comment[1]: TITLE=Tittle
+    comment[2]: artist=Fartist
+    comment[3]: artist=artits
+METADATA block #3
+  type: 5 (CUESHEET)
+  is last: false
+  length: 480
+  media catalog number: 1234567890123
+  lead-in: 0
+  is CD: false
+  number of tracks: 2
+    track[0]
+      offset: 0
+      number: 1
+      ISRC: 
+      type: AUDIO
+      pre-emphasis: false
+      number of index points: 1
+        index[0]
+          offset: 0
+          number: 1
+    track[1]
+      offset: 80000
+      number: 1 (LEAD-OUT)
+METADATA block #4
+  type: 6 (PICTURE)
+  is last: false
+  length: 141
+  type: 3 (Cover (front))
+  MIME type: image/gif
+  description: 0.gif
+  width: 24
+  height: 24
+  depth: 24
+  colors: 2
+  data length: 95
+  data:
+METADATA block #5
+  type: 1 (PADDING)
+  is last: true
+  length: 43

test/metaflac-test-files/case47-expect.meta

+METADATA block #0
+  type: 0 (STREAMINFO)
+  is last: false
+  length: 34
+  sample_rate: 8000 Hz
+  channels: 1
+  bits-per-sample: 8
+  total samples: 80000
+  MD5 signature: a042237c5493fdb9656b94a83608d11a
+METADATA block #1
+  type: 3 (SEEKTABLE)
+  is last: false
+  length: 18
+  seek points: 1
+    point 0: sample_number=0
+METADATA block #2
+  type: 4 (VORBIS_COMMENT)
+  is last: false
+  length: 117
+  comments: 4
+    comment[0]: f=0123456789abcdefghij
+    comment[1]: TITLE=Tittle
+    comment[2]: artist=Fartist
+    comment[3]: artist=artits
+METADATA block #3
+  type: 5 (CUESHEET)
+  is last: false
+  length: 480
+  media catalog number: 1234567890123
+  lead-in: 0
+  is CD: false
+  number of tracks: 2
+    track[0]
+      offset: 0
+      number: 1
+      ISRC: 
+      type: AUDIO
+      pre-emphasis: false
+      number of index points: 1
+        index[0]
+          offset: 0
+          number: 1
+    track[1]
+      offset: 80000
+      number: 1 (LEAD-OUT)
+METADATA block #4
+  type: 6 (PICTURE)
+  is last: false
+  length: 141
+  type: 3 (Cover (front))
+  MIME type: image/gif
+  description: 0.gif
+  width: 24
+  height: 24
+  depth: 24
+  colors: 2
+  data length: 95
+  data:
+METADATA block #5
+  type: 6 (PICTURE)
+  is last: false
+  length: 917
+  type: 3 (Cover (front))
+  MIME type: image/gif
+  description: 1.gif
+  width: 12
+  height: 8
+  depth: 24
+  colors: 256
+  data length: 871
+  data:
+METADATA block #6
+  type: 1 (PADDING)
+  is last: true
+  length: 43