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Add APE tag demuxer (#325649).

Browse source 
Original commit message from CVS:
* configure.ac:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
* docs/plugins/gst-plugins-good-plugins.hierarchy:
* docs/plugins/inspect/plugin-apetag.xml:
* gst/apetag/Makefile.am:
* gst/apetag/gstapedemux.c:
* gst/apetag/gstapedemux.h:
* gst/apetag/gsttagdemux.c:
* gst/apetag/gsttagdemux.h:
Add APE tag demuxer (#325649).
This commit is contained in:
Tim-Philipp Müller 2006-02-06 10:56:07 +00:00
parent 059527abc0
commit 5bc69ce9bd
12 changed files with 1917 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
ChangeLog
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@ -1,3 +1,18 @@
2006-02-06 Tim-Philipp Müller <tim at centricular dot net>
* configure.ac:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
* docs/plugins/gst-plugins-good-plugins.hierarchy:
* docs/plugins/inspect/plugin-apetag.xml:
* gst/apetag/Makefile.am:
* gst/apetag/gstapedemux.c:
* gst/apetag/gstapedemux.h:
* gst/apetag/gsttagdemux.c:
* gst/apetag/gsttagdemux.h:
Add APE tag demuxer (#325649).
2006-02-05 Jan Schmidt <thaytan@mad.scientist.com>
* ext/gconf/gconf.c: (gst_gconf_get_default_audio_sink),

2
configure.ac
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@ -71,6 +71,7 @@ dnl videofilter is at the top because others depend on it
GST_PLUGINS_ALL="\
videofilter \
alpha \
apetag \
auparse \
autodetect \
avi \
@ -583,6 +584,7 @@ AC_CONFIG_FILES(
Makefile
gst/Makefile
gst/alpha/Makefile
gst/apetag/Makefile
gst/auparse/Makefile
gst/autodetect/Makefile
gst/avi/Makefile

1
docs/plugins/Makefile.am
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@ -74,6 +74,7 @@ IGNORE_CFILES =
# the registry won't have the element
EXTRA_HFILES = \
$(top_srcdir)/gst/apetag/gstapedemux.h \
$(top_srcdir)/gst/autodetect/gstautoaudiosink.h \
$(top_srcdir)/gst/autodetect/gstautovideosink.h \
$(top_srcdir)/gst/level/gstlevel.h \

2
docs/plugins/gst-plugins-good-plugins-docs.sgml
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@ -12,6 +12,7 @@
<chapter>
<title>gst-plugins-good Elements</title>
<xi:include href="xml/element-apedemux.xml" />
<xi:include href="xml/element-autoaudiosink.xml" />
<xi:include href="xml/element-autovideosink.xml" />
<xi:include href="xml/element-cairotimeoverlay.xml" />
@ -34,6 +35,7 @@
<xi:include href="xml/plugin-alaw.xml" />
<xi:include href="xml/plugin-alpha.xml" />
<xi:include href="xml/plugin-alphacolor.xml" />
<xi:include href="xml/plugin-apetag.xml" />
<xi:include href="xml/plugin-autodetect.xml" />
<xi:include href="xml/plugin-avi.xml" />
<xi:include href="xml/plugin-cacasink.xml" />

8
docs/plugins/gst-plugins-good-plugins-sections.txt
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@ -1,3 +1,11 @@
<SECTION>
<FILE>element-apedemux</FILE>
GstApeDemux
<TITLE>apedemux</TITLE>
<SUBSECTION Standard>
GstApeDemuxClass
</SECTION>
<SECTION>
<FILE>element-autoaudiosink</FILE>
GstAutoAudioSink

2
docs/plugins/gst-plugins-good-plugins.hierarchy
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@ -104,6 +104,8 @@ GObject
GstAviDemux
GstAuParse
GstAlpha
GstTagDemux
GstApeDemux
GstPlugin
GstRegistry
GstPadTemplate

20
docs/plugins/inspect/plugin-apetag.xml Normal file
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@ -0,0 +1,20 @@
<plugin>
<name>apetag</name>
<description>APEv1/2 tag reader</description>
<filename>../../gst/apedemux/.libs/libgstapetag.so</filename>
<basename>libgstapetag.so</basename>
<version>0.10.1.1</version>
<license>LGPL</license>
<source>gst-plugins-good</source>
<package>GStreamer Good Plug-ins CVS/prerelease</package>
<origin>Unknown package origin</origin>
<elements>
<element>
<name>apedemux</name>
<longname>APE tag demuxer</longname>
<class>Codec/Demuxer/Metadata</class>
<description>Read and output APE tags while demuxing the contents</description>
<author>Ronald Bultje &lt;rbultje@ronald.bitfreak.net&gt;, Tim-Philipp Müller &lt;tim centricular net&gt;</author>
</element>
</elements>
</plugin>

11
gst/apetag/Makefile.am Normal file
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@ -0,0 +1,11 @@
plugin_LTLIBRARIES = libgstapetag.la
libgstapetag_la_SOURCES = gstapedemux.c gsttagdemux.c
libgstapetag_la_CFLAGS = \
-I$(top_srcdir)/gst-libs \
$(GST_CFLAGS)
libgstapetag_la_LIBADD = \
$(GST_LIBS)
libgstapetag_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstapedemux.h gsttagdemux.h

356
gst/apetag/gstapedemux.c Normal file
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@ -0,0 +1,356 @@
/* GStreamer APEv1/2 tag reader
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-apedemux
* @short_description: reads tag information from APE tag data blocks and
* outputs them as GStreamer tag messages and events.
*
* <refsect2>
* <para>
* apedemux accepts data streams with APE tags at the start or at the end
* (or both). The mime type of the data between the tag blocks is detected
* using typefind functions, and the appropriate output mime type set on
* outgoing buffers.
* </para>
* <para>
* The element is only able to read APE tags at the end of a stream from
* a seekable stream, ie. when get_range mode is supported by the upstream
* elements. If get_range operation is available, apedemux makes it available
* downstream. This means that elements which require get_range mode, such as
* wavparse or musepackdec, can operate on files containing APE tag
* information.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch -t filesrc location=file.mpc ! apedemux ! fakesink
* </programlisting>
* This pipeline should read any available APE tag information and output it.
* The contents of the file inside the APE tag regions should be detected, and
* the appropriate mime type set on buffers produced from apedemux.
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/gst-i18n-plugin.h>
#include "gstapedemux.h"
#include <string.h>
#define APE_VERSION_MAJOR(ver) ((ver)/1000)
GST_DEBUG_CATEGORY (apedemux_debug);
#define GST_CAT_DEFAULT (apedemux_debug)
static GstElementDetails gst_ape_demux_details =
GST_ELEMENT_DETAILS ("APE tag demuxer",
"Codec/Demuxer/Metadata",
"Read and output APE tags while demuxing the contents",
"Ronald Bultje <rbultje@ronald.bitfreak.net>, "
"Tim-Philipp Müller <tim centricular net>");
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-apetag")
);
static gboolean gst_ape_demux_identify_tag (GstTagDemux * demux,
GstBuffer * buffer, gboolean start_tag, guint * tag_size);
static GstTagDemuxResult gst_ape_demux_parse_tag (GstTagDemux * demux,
GstBuffer * buffer, gboolean start_tag, guint * tag_size,
GstTagList ** tags);
GST_BOILERPLATE (GstApeDemux, gst_ape_demux, GstTagDemux, GST_TYPE_TAG_DEMUX)
static void gst_ape_demux_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details (element_class, &gst_ape_demux_details);
GST_DEBUG_CATEGORY_INIT (apedemux_debug, "apedemux", 0,
"GStreamer APE tag demuxer");
}
static void
gst_ape_demux_class_init (GstApeDemuxClass * klass)
{
GstTagDemuxClass *tagdemux_class;
tagdemux_class = GST_TAG_DEMUX_CLASS (klass);
tagdemux_class->identify_tag = GST_DEBUG_FUNCPTR (gst_ape_demux_identify_tag);
tagdemux_class->parse_tag = GST_DEBUG_FUNCPTR (gst_ape_demux_parse_tag);
}
static void
gst_ape_demux_init (GstApeDemux * apedemux, GstApeDemuxClass * gclass)
{
GstTagDemux *tagdemux = GST_TAG_DEMUX (apedemux);
tagdemux->min_start_size = 32;
tagdemux->min_end_size = 32;
tagdemux->prefer_start_tag = TRUE;
}
static const struct _GstApeDemuxTagTableEntry
{
const gchar *ape_tag;
const gchar *gst_tag;
} tag_table[] = {
{
"replaygain_track_gain", GST_TAG_TRACK_GAIN}, {
"replaygain_track_peak", GST_TAG_TRACK_PEAK}, {
"replaygain_album_gain", GST_TAG_ALBUM_GAIN}, {
"replaygain_album_peak", GST_TAG_ALBUM_PEAK}, {
"title", GST_TAG_TITLE}, {
"artist", GST_TAG_ARTIST}, {
"album", GST_TAG_ALBUM}, {
"comment", GST_TAG_COMMENT}, {
"comments", GST_TAG_COMMENT}, {
"copyright", GST_TAG_COPYRIGHT}, {
"genre", GST_TAG_GENRE}, {
"isrc", GST_TAG_ISRC}, {
"track", GST_TAG_TRACK_NUMBER}, {
"year", GST_TAG_DATE}
};
static gboolean
ape_demux_get_gst_tag_from_tag (const gchar * ape_tag,
const gchar ** gst_tag, GType * gst_tag_type)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (tag_table); ++i) {
if (g_ascii_strcasecmp (tag_table[i].ape_tag, ape_tag) == 0) {
*gst_tag = tag_table[i].gst_tag;
*gst_tag_type = gst_tag_get_type (tag_table[i].gst_tag);
return TRUE;
}
}
GST_WARNING ("Could not map APE tag '%s' to a GStreamer tag", ape_tag);
return FALSE;
}
static GstTagList *
ape_demux_parse_tags (const guint8 * data, gint size)
{
GstTagList *taglist = gst_tag_list_new ();
gboolean have_tag = FALSE;
GST_LOG ("Reading tags from chunk of size %u bytes", size);
/* get rid of header/footer */
if (size >= 32 && memcmp (data, "APETAGEX", 8) == 0) {
data += 32;
size -= 32;
}
if (size > 32 && memcmp (data + size - 32, "APETAGEX", 8) == 0) {
size -= 32;
}
/* read actual tags - at least 10 bytes for tag header */
while (size >= 10) {
guint len, n = 8;
gchar *tag, *val;
const gchar *gst_tag;
GType gst_tag_type;
/* find tag type and size */
len = GST_READ_UINT32_LE (data);
while (n < size && data[n] != 0x0)
n++;
if (n == size)
break;
g_assert (data[n] == 0x0);
n++;
if (size - n < len)
break;
/* read */
tag = g_strndup ((gchar *) data + 8, n - 9);
val = g_strndup ((gchar *) data + n, len);
if (ape_demux_get_gst_tag_from_tag (tag, &gst_tag, &gst_tag_type)) {
GValue v = { 0, };
switch (gst_tag_type) {
case G_TYPE_INT:
g_value_init (&v, G_TYPE_INT);
g_value_set_int (&v, atoi (val));
break;
case G_TYPE_UINT:
g_value_init (&v, G_TYPE_UINT);
g_value_set_uint (&v, (guint) atof (val)); /* hmmm */
break;
case G_TYPE_STRING:
g_value_init (&v, G_TYPE_STRING);
g_value_set_string (&v, val);
break;
case G_TYPE_DOUBLE:
g_value_init (&v, G_TYPE_DOUBLE);
g_value_set_double (&v, atof (val));
break;
default:{
if (gst_tag_type == GST_TYPE_DATE) {
GDate *date = g_date_new_dmy (1, 1, atoi (val));
g_value_init (&v, GST_TYPE_DATE);
gst_value_set_date (&v, date);
g_date_free (date);
} else {
GST_WARNING ("Unhandled tag type '%s' for tag '%s'",
g_type_name (gst_tag_type), gst_tag);
}
break;
}
}
if (G_VALUE_TYPE (&v) != 0) {
gst_tag_list_add_values (taglist, GST_TAG_MERGE_APPEND,
gst_tag, &v, NULL);
g_value_unset (&v);
have_tag = TRUE;
}
}
GST_DEBUG ("Read tag %s: %s", tag, val);
g_free (tag);
g_free (val);
/* move data pointer */
size -= len + n;
data += len + n;
}
GST_DEBUG ("Taglist: %" GST_PTR_FORMAT, taglist);
return taglist;
}
static gboolean
gst_ape_demux_identify_tag (GstTagDemux * demux, GstBuffer * buffer,
gboolean start_tag, guint * tag_size)
{
if (memcmp (GST_BUFFER_DATA (buffer), "APETAGEX", 8) != 0) {
GST_DEBUG_OBJECT (demux, "No APETAGEX marker at %s - not an APE file",
(start_tag) ? "start" : "end");
return FALSE;
}
*tag_size = GST_READ_UINT32_LE (GST_BUFFER_DATA (buffer) + 12);
/* size is without header, so add 32 to account for that */
*tag_size += 32;
return TRUE;
}
static GstTagDemuxResult
gst_ape_demux_parse_tag (GstTagDemux * demux, GstBuffer * buffer,
gboolean start_tag, guint * tag_size, GstTagList ** tags)
{
const guint8 *data;
const guint8 *footer;
gboolean have_header;
gboolean end_tag = !start_tag;
guint version, footer_size;
GST_LOG_OBJECT (demux, "Parsing buffer of size %u", GST_BUFFER_SIZE (buffer));
data = GST_BUFFER_DATA (buffer);
footer = GST_BUFFER_DATA (buffer) + GST_BUFFER_SIZE (buffer) - 32;
GST_LOG_OBJECT (demux, "Checking for footer at offset 0x%04x",
(guint) (footer - data));
if (footer > data && memcmp (footer, "APETAGEX", 8) == 0) {
GST_DEBUG_OBJECT (demux, "Found footer");
footer_size = 32;
} else {
GST_DEBUG_OBJECT (demux, "No footer");
footer_size = 0;
}
/* APE tags at the end must have a footer */
if (end_tag && footer_size == 0) {
GST_WARNING_OBJECT (demux, "Tag at end of file without footer!");
return GST_TAG_DEMUX_RESULT_BROKEN_TAG;
}
/* don't trust the header/footer flags, better detect them ourselves */
have_header = (memcmp (data, "APETAGEX", 8) == 0);
if (start_tag && !have_header) {
GST_DEBUG_OBJECT (demux, "Tag at beginning of file without header!");
return GST_TAG_DEMUX_RESULT_BROKEN_TAG;
}
if (end_tag && !have_header) {
GST_DEBUG_OBJECT (demux, "Tag at end of file has no header (APEv1)");
*tag_size -= 32; /* adjust tag size */
}
if (have_header) {
version = GST_READ_UINT32_LE (data + 8);
} else {
version = GST_READ_UINT32_LE (footer + 8);
}
/* skip header */
if (have_header) {
data += 32;
}
GST_DEBUG_OBJECT (demux, "APE tag with version %u, size %u at offset 0x%08"
G_GINT64_MODIFIER "x", version, *tag_size,
GST_BUFFER_OFFSET (buffer) + ((have_header) ? 0 : 32));
if (APE_VERSION_MAJOR (version) != 1 && APE_VERSION_MAJOR (version) != 2) {
GST_WARNING ("APE tag is version %u.%03u, but decoder only supports "
"v1 or v2. Ignoring.", APE_VERSION_MAJOR (version), version % 1000);
return GST_TAG_DEMUX_RESULT_OK;
}
*tags = ape_demux_parse_tags (data, *tag_size - footer_size);
return GST_TAG_DEMUX_RESULT_OK;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "apedemux",
GST_RANK_PRIMARY, GST_TYPE_APE_DEMUX);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"apetag",
"APEv1/2 tag reader",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

51
gst/apetag/gstapedemux.h Normal file
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@ -0,0 +1,51 @@
/* GStreamer APEv1/2 tag reader
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_APE_DEMUX_H__
#define __GST_APE_DEMUX_H__
#include <gst/tag/gsttagdemux.h>
G_BEGIN_DECLS
#define GST_TYPE_APE_DEMUX (gst_ape_demux_get_type())
#define GST_APE_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_APE_DEMUX,GstApeDemux))
#define GST_APE_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_APE_DEMUX,GstApeDemuxClass))
#define GST_IS_APE_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_APE_DEMUX))
#define GST_IS_APE_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_APE_DEMUX))
typedef struct _GstApeDemux GstApeDemux;
typedef struct _GstApeDemuxClass GstApeDemuxClass;
struct _GstApeDemux
{
GstTagDemux tagdemux;
};
struct _GstApeDemuxClass
{
GstTagDemuxClass parent_class;
};
GType gst_ape_demux_get_type (void);
G_END_DECLS
#endif /* __GST_APE_DEMUX_H__ */

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@ -0,0 +1,105 @@
/* GStreamer Base Class for Tag Demuxing
* Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_TAG_DEMUX_H__
#define __GST_TAG_DEMUX_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_TAG_DEMUX (gst_tag_demux_get_type())
#define GST_TAG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TAG_DEMUX,GstTagDemux))
#define GST_TAG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TAG_DEMUX,GstTagDemuxClass))
#define GST_IS_TAG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TAG_DEMUX))
#define GST_IS_TAG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TAG_DEMUX))
typedef struct _GstTagDemux GstTagDemux;
typedef struct _GstTagDemuxClass GstTagDemuxClass;
typedef struct _GstTagDemuxPrivate GstTagDemuxPrivate;
/**
* GstTagDemuxResult:
* @GST_TAG_DEMUX_RESULT_BROKEN_TAG: cannot parse tag, just skip it
* @GST_TAG_DEMUX_RESULT_AGAIN : call again with less or more data
* @GST_TAG_DEMUX_RESULT_OK : parsed tag successfully
*
* Result values from the parse_tag virtual function.
*/
typedef enum {
GST_TAG_DEMUX_RESULT_BROKEN_TAG,
GST_TAG_DEMUX_RESULT_AGAIN,
GST_TAG_DEMUX_RESULT_OK
} GstTagDemuxResult;
struct _GstTagDemux
{
GstElement element;
/* Minimum size required to identify a tag at the start and
* determine its total size (0 = not interested in start) */
guint min_start_size;
/* Minimum size required to identify a tag at the end and
* determine its total size (0 = not interested in end) */
guint min_end_size;
/* Prefer start tags over end tags (default: yes) */
gboolean prefer_start_tag;
/*< private >*/
gpointer reserved[GST_PADDING];
GstTagDemuxPrivate *priv;
};
/* Note: subclass must also add a sink pad template in its base_init */
struct _GstTagDemuxClass
{
GstElementClass parent_class;
/* vtable */
/* Identify tag and determine the size required to parse the tag. Buffer
* may be larger than the specified minimum size. */
gboolean (*identify_tag) (GstTagDemux * demux,
GstBuffer * buffer,
gboolean start_tag,
guint * tag_size);
/* Parse the tag. Buffer should be exactly the size determined by
* identify_tag() before. parse_tag() may change tag_size and return
* GST_TAG_DEMUX_RESULT_AGAIN to request a larger or smaller buffer.
* parse_tag() is also permitted to adjust tag_size to a smaller value
* and return GST_TAG_DEMUX_RESULT_OK. */
GstTagDemuxResult (*parse_tag) (GstTagDemux * demux,
GstBuffer * buffer,
gboolean start_tag,
guint * tag_size,
GstTagList ** tags);
/*< private >*/
gpointer reserved[GST_PADDING];
};
GType gst_tag_demux_get_type (void);
G_END_DECLS
#endif /* __GST_TAG_DEMUX_H__ */