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added new element to add Xing headers to MP3 files (this allows decoder to figure out the length of VBR files)
Original commit message from CVS: 2006-03-11 Christophe Fergeau <teuf@gnome.org> Reviewed by: Tim-Philipp Müller <tim at centricular dot net> * configure.ac: * gst/xingheader/Makefile.am: * gst/xingheader/gstxingmux.c: * gst/xingheader/gstxingmux.h: added new element to add Xing headers to MP3 files (this allows decoder to figure out the length of VBR files)
This commit is contained in:
Christophe Fergeau
parent
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commit
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5 changed files with 457 additions and 0 deletions
11
ChangeLog
11
ChangeLog
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@ -1,3 +1,14 @@
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2006-03-11 Christophe Fergeau <teuf@gnome.org>
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Reviewed by: Tim-Philipp Müller <tim at centricular dot net>
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* configure.ac:
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* gst/xingheader/Makefile.am:
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* gst/xingheader/gstxingmux.c:
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* gst/xingheader/gstxingmux.h: added new element to add Xing headers
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to MP3 files (this allows decoder to figure out the length of VBR
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files)
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2006-03-11 Christophe Fergeau <teuf@gnome.org>
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2006-03-11 Christophe Fergeau <teuf@gnome.org>
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Patch by: Alex Lancaster
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Patch by: Alex Lancaster
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@ -285,6 +285,7 @@ GST_PLUGINS_ALL="\
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freeze \
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freeze \
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speed \
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speed \
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qtdemux \
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qtdemux \
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xingheader \
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tta \
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tta \
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"
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"
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@ -730,6 +731,7 @@ gst/modplug/libmodplug/Makefile
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gst/speed/Makefile
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gst/speed/Makefile
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gst/qtdemux/Makefile
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gst/qtdemux/Makefile
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gst/tta/Makefile
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gst/tta/Makefile
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gst/xingheader/Makefile
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sys/Makefile
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sys/Makefile
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sys/glsink/Makefile
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sys/glsink/Makefile
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sys/ximagesrc/Makefile
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sys/ximagesrc/Makefile
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12
gst/xingheader/Makefile.am
Normal file
12
gst/xingheader/Makefile.am
Normal file
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@ -0,0 +1,12 @@
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plugin_LTLIBRARIES = libgstxingheader.la
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libgstxingheader_la_SOURCES = gstxingmux.c
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libgstxingheader_la_CFLAGS = $(GST_CFLAGS)
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libgstxingheader_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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noinst_HEADERS = gstxingmux.h
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AM_CFLAGS = $(GST_CFLAGS)
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LIBS = $(GST_LIBS) $(LAME_LIBS)
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380
gst/xingheader/gstxingmux.c
Normal file
380
gst/xingheader/gstxingmux.c
Normal file
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@ -0,0 +1,380 @@
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/*
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* (c) 2006 Christophe Fergeau <teuf@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include "gstxingmux.h"
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GST_DEBUG_CATEGORY_STATIC (xing_mux_debug);
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#define GST_CAT_DEFAULT xing_mux_debug
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GST_BOILERPLATE (GstXingMux, gst_xing_mux, GstElement, GST_TYPE_ELEMENT);
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/* Xing Header stuff */
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struct _GstXingMuxPriv
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{
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guint64 duration;
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guint64 byte_count;
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GList *seek_table;
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gboolean flush;
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};
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#define GST_XING_FRAME_FIELD (1 << 0)
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#define GST_XING_BYTES_FIELD (1 << 1)
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#define GST_XING_TOC_FIELD (1 << 2)
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#define GST_XING_QUALITY_FIELD (1 << 3)
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static const int XING_FRAME_SIZE = 418;
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static GstStateChangeReturn
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gst_xing_mux_change_state (GstElement * element, GstStateChange transition);
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static GstFlowReturn gst_xing_mux_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_xing_mux_sink_event (GstPad * pad, GstEvent * event);
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static void
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gst_xing_mux_finalize (GObject * obj)
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{
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GstXingMux *xing = GST_XING_MUX (obj);
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g_free (xing->priv);
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xing->priv = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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static GstStaticPadTemplate gst_xing_mux_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/mpeg, "
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"mpegversion = (int) 1, " "layer = (int) 3"));
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static GstStaticPadTemplate gst_xing_mux_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/mpeg, "
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"mpegversion = (int) 1, " "layer = (int) 3"));
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static void
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gst_xing_mux_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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static GstElementDetails gst_xing_mux_details = {
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"MP3 Xing Muxer",
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"Formatter/Metadata",
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"Adds a Xing header to the beginning of a VBR MP3 file",
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"Christophe Fergeau <teuf@gnome.org>"
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};
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_xing_mux_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_xing_mux_sink_template));
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gst_element_class_set_details (element_class, &gst_xing_mux_details);
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}
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static void
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gst_xing_mux_class_init (GstXingMuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_xing_mux_finalize);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_xing_mux_change_state);
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}
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static void
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xing_set_flush (GstXingMux * xing, gboolean flush)
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{
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if (xing->priv == NULL) {
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return;
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}
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xing->priv->flush = flush;
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}
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static void
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gst_xing_mux_init (GstXingMux * xing, GstXingMuxClass * xingmux_class)
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{
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GstElementClass *klass = GST_ELEMENT_CLASS (xingmux_class);
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/* pad through which data comes in to the element */
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xing->sinkpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"sink"), "sink");
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gst_pad_set_setcaps_function (xing->sinkpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
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gst_pad_set_chain_function (xing->sinkpad,
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GST_DEBUG_FUNCPTR (gst_xing_mux_chain));
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gst_pad_set_event_function (xing->sinkpad,
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GST_DEBUG_FUNCPTR (gst_xing_mux_sink_event));
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gst_element_add_pad (GST_ELEMENT (xing), xing->sinkpad);
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/* pad through which data goes out of the element */
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xing->srcpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"src"), "src");
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gst_element_add_pad (GST_ELEMENT (xing), xing->srcpad);
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xing->priv = g_malloc0 (sizeof (GstXingMuxPriv));
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xing_set_flush (xing, TRUE);
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xing->priv->duration = GST_CLOCK_TIME_NONE;
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}
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G_GNUC_UNUSED static void
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xing_update_data (GstXingMux * xing, gint bytes, guint64 duration)
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{
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if (xing->priv == NULL) {
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return;
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}
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xing->priv->byte_count += bytes;
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if (duration == GST_CLOCK_TIME_NONE) {
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return;
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}
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if (xing->priv->duration == GST_CLOCK_TIME_NONE) {
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xing->priv->duration = duration;
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} else {
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xing->priv->duration += duration;
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}
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}
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static GstBuffer *
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xing_generate_header (GstXingMux * xing)
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{
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guint32 xing_flags;
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GstBuffer *header;
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guint32 *data;
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/* Dummy header that we will stick at the beginning of our frame
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*
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* 0xffe => synchronization bits
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* 0x1b => 11010b (11b == MPEG1 | 01b == Layer III | 0b == no CRC)
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* 0x9 => 128kbps
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* 0x00 => 00b == 44100 Hz | 0b == no padding | 0b == private bit
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* 0x44 => 0010b 0010b (00b == stereo | 10b == (unused) mode extension)
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* (0b == no copyright bit | 0b == original bit)
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* (00b == no emphasis)
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*
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* Such a frame (MPEG1 Layer III) contains 1152 samples, its size is thus:
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* (1152*(128000/8))/44100 = 417.96
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*
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* There are also 32 bytes (ie 8 32 bits values) to skip after the header
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* for such frames
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*/
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const guint8 mp3_header[4] = { 0xff, 0xfb, 0x90, 0x44 };
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const int SIDE_INFO_SIZE = 32 / sizeof (guint32);
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header = gst_buffer_new_and_alloc (XING_FRAME_SIZE);
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data = (guint32 *) GST_BUFFER_DATA (header);
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memset (data, 0, XING_FRAME_SIZE);
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memcpy (data, mp3_header, 4);
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memcpy (&data[8 + 1], "Xing", 4);
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xing_flags = 0;
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if (xing->priv->duration != GST_CLOCK_TIME_NONE) {
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guint number_of_frames;
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/* The Xing Header contains a NumberOfFrames field, which verifies to:
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* Duration = NumberOfFrames *SamplesPerFrame/SamplingRate
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* SamplesPerFrame and SamplingRate are values for the current frame,
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* ie 1152 and 44100 in our case.
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*/
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number_of_frames = (44100 * xing->priv->duration / GST_SECOND) / 1152;
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data[SIDE_INFO_SIZE + 3] = GUINT32_TO_BE (number_of_frames);
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xing_flags |= GST_XING_FRAME_FIELD;
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}
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if (xing->priv->byte_count != 0) {
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xing_flags |= GST_XING_BYTES_FIELD;
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data[SIDE_INFO_SIZE + 4] = GUINT32_TO_BE (xing->priv->byte_count);
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}
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/* Un-#ifdef when it's implemented :) xing code in VbrTag.c looks like
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* it could be stolen
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*/
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#if 0
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if (xing->priv->seek_table != NULL) {
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GList *it;
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xing_flags |= GST_XING_TOC_FIELD;
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for (it = xing->priv->seek_table; it != NULL; it = it->next) {
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/* do something */
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}
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}
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#endif
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data[SIDE_INFO_SIZE + 2] = GUINT32_TO_BE (xing_flags);
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gst_buffer_set_caps (header, GST_PAD_CAPS (xing->srcpad));
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// gst_util_dump_mem ((guchar *)data, XING_FRAME_SIZE);
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return header;
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}
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static gboolean
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xing_ready_to_flush (GstXingMux * xing)
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{
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if (xing->priv == NULL) {
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return FALSE;
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}
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return xing->priv->flush;
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}
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static void
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xing_push_header (GstXingMux * xing)
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{
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GstBuffer *header;
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GstEvent *event;
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event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
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0, GST_CLOCK_TIME_NONE, 0);
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gst_pad_push_event (xing->srcpad, event);
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header = xing_generate_header (xing);
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xing_set_flush (xing, FALSE);
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GST_INFO ("Writing real Xing header to beginning of stream");
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gst_pad_push (xing->srcpad, header);
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}
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static GstFlowReturn
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gst_xing_mux_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstXingMux *xing = GST_XING_MUX (GST_OBJECT_PARENT (pad));
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xing_update_data (xing, GST_BUFFER_SIZE (buffer),
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GST_BUFFER_DURATION (buffer));
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if (xing_ready_to_flush (xing)) {
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GST_INFO ("Writing empty Xing header to stream");
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gst_pad_push (xing->srcpad, xing_generate_header (xing));
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xing_set_flush (xing, FALSE);
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}
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return gst_pad_push (xing->srcpad, buffer);
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}
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static gboolean
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gst_xing_mux_sink_event (GstPad * pad, GstEvent * event)
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{
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GstXingMux *xing;
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gboolean result;
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xing = GST_XING_MUX (gst_pad_get_parent (pad));
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result = FALSE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_NEWSEGMENT:
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{
|
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gboolean update;
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gdouble rate;
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GstFormat format;
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gint64 value, end_value, base;
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|
||||||
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gst_event_parse_new_segment (event, &update, &rate, &format,
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&value, &end_value, &base);
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gst_event_unref (event);
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||||||
|
if (format == GST_FORMAT_BYTES && gst_pad_is_linked (xing->srcpad)) {
|
||||||
|
GstEvent *new_event;
|
||||||
|
|
||||||
|
GST_INFO ("Adjusting NEW_SEGMENT event by %d", XING_FRAME_SIZE);
|
||||||
|
value += XING_FRAME_SIZE;
|
||||||
|
if (end_value != -1) {
|
||||||
|
end_value += XING_FRAME_SIZE;
|
||||||
|
}
|
||||||
|
|
||||||
|
new_event = gst_event_new_new_segment (update, rate, format,
|
||||||
|
value, end_value, base);
|
||||||
|
result = gst_pad_push_event (xing->srcpad, new_event);
|
||||||
|
} else {
|
||||||
|
result = FALSE;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
case GST_EVENT_EOS:
|
||||||
|
GST_DEBUG_OBJECT (xing, "handling EOS event");
|
||||||
|
xing_push_header (xing);
|
||||||
|
result = gst_pad_push_event (xing->srcpad, event);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
result = gst_pad_event_default (pad, event);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
gst_object_unref (GST_OBJECT (xing));
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static GstStateChangeReturn
|
||||||
|
gst_xing_mux_change_state (GstElement * element, GstStateChange transition)
|
||||||
|
{
|
||||||
|
GstXingMux *xing;
|
||||||
|
GstStateChangeReturn result;
|
||||||
|
|
||||||
|
xing = GST_XING_MUX (element);
|
||||||
|
|
||||||
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||||||
|
|
||||||
|
switch (transition) {
|
||||||
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
||||||
|
memset (xing->priv, 0, sizeof (GstXingMuxPriv));
|
||||||
|
xing_set_flush (xing, TRUE);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static gboolean
|
||||||
|
plugin_init (GstPlugin * plugin)
|
||||||
|
{
|
||||||
|
if (!gst_element_register (plugin, "xingmux", GST_RANK_NONE,
|
||||||
|
GST_TYPE_XING_MUX))
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
GST_DEBUG_CATEGORY_INIT (xing_mux_debug, "xingmux", 0, "Xing Header Muxer");
|
||||||
|
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
||||||
|
GST_VERSION_MINOR,
|
||||||
|
"xingheader",
|
||||||
|
"Add a xing header to mp3 encoded data",
|
||||||
|
plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
|
||||||
52
gst/xingheader/gstxingmux.h
Normal file
52
gst/xingheader/gstxingmux.h
Normal file
|
|
@ -0,0 +1,52 @@
|
||||||
|
/*
|
||||||
|
* (c) 2006 Christophe Fergeau <teuf@gnome.org>
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <gst/gst.h>
|
||||||
|
|
||||||
|
typedef struct _GstXingMuxPriv GstXingMuxPriv;
|
||||||
|
|
||||||
|
/* Definition of structure storing data for this element. */
|
||||||
|
typedef struct _GstXingMux {
|
||||||
|
GstElement element;
|
||||||
|
|
||||||
|
GstPad *sinkpad, *srcpad;
|
||||||
|
|
||||||
|
GstXingMuxPriv *priv;
|
||||||
|
|
||||||
|
} GstXingMux;
|
||||||
|
|
||||||
|
/* Standard definition defining a class for this element. */
|
||||||
|
typedef struct _GstXingMuxClass {
|
||||||
|
GstElementClass parent_class;
|
||||||
|
} GstXingMuxClass;
|
||||||
|
|
||||||
|
/* Standard macros for defining types for this element. */
|
||||||
|
#define GST_TYPE_XING_MUX \
|
||||||
|
(gst_xing_mux_get_type())
|
||||||
|
#define GST_XING_MUX(obj) \
|
||||||
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_XING_MUX,GstXingMux))
|
||||||
|
#define GST_XING_MUX_CLASS(klass) \
|
||||||
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_XING_MUX,GstXingMuxClass))
|
||||||
|
#define GST_IS_XING_MUX(obj) \
|
||||||
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_XING_MUX))
|
||||||
|
#define GST_IS_XING_MUX_CLASS(obj) \
|
||||||
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_XING_MUX))
|
||||||
|
|
||||||
|
/* Standard function returning type information. */
|
||||||
|
GType gst_my_filter_get_type (void);
|
||||||
Loading…
Reference in a new issue