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gst/cdxaparse/: Port VCD parser (formerly cdxastrip) from 0.8 to 0.10. Doesn't do anything the 0.8 version didn't do ...

Browse source 
Original commit message from CVS:
* gst/cdxaparse/Makefile.am:
* gst/cdxaparse/gstcdxaparse.c:
* gst/cdxaparse/gstcdxastrip.c:
* gst/cdxaparse/gstcdxastrip.h:
* gst/cdxaparse/gstvcdparse.c:
* gst/cdxaparse/gstvcdparse.h:
Port VCD parser (formerly cdxastrip) from 0.8 to 0.10. Doesn't do
anything the 0.8 version didn't do though.
This commit is contained in:
Tim-Philipp Müller 2008-04-11 13:08:24 +00:00
parent 5788aba92c
commit 2079938fc2
7 changed files with 352 additions and 814 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2008-04-11 Tim-Philipp Müller <tim at centricular dot net>
* gst/cdxaparse/Makefile.am:
* gst/cdxaparse/gstcdxaparse.c:
* gst/cdxaparse/gstcdxastrip.c:
* gst/cdxaparse/gstcdxastrip.h:
* gst/cdxaparse/gstvcdparse.c:
* gst/cdxaparse/gstvcdparse.h:
Port VCD parser (formerly cdxastrip) from 0.8 to 0.10. Doesn't do
anything the 0.8 version didn't do though.
2008-04-11 Julien Moutte <julien@fluendo.com>
* sys/oss4/oss4-mixer-enum.c:

11
gst/cdxaparse/Makefile.am
View file

@ -1,21 +1,22 @@
plugin_LTLIBRARIES = libgstcdxaparse.la
# gstcdxastrip.c
# gstcdxastrip.h
libgstcdxaparse_la_SOURCES = \
gstcdxaparse.c
gstcdxaparse.c \
gstvcdparse.c
noinst_HEADERS = \
gstcdxaparse.h
gstcdxaparse.h \
gstvcdparse.h
libgstcdxaparse_la_CFLAGS = \
$(GST_CFLAGS) \
$(GST_BASE_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS)
libgstcdxaparse_la_LIBADD = \
$(GST_LIBS) \
$(GST_BASE_LIBS) \
$(GST_PLUGINS_BASE_LIBS) \
-lgstriff-@GST_MAJORMINOR@

19
gst/cdxaparse/gstcdxaparse.c
View file

@ -25,10 +25,13 @@
#include <string.h>
#include "gstcdxaparse.h"
/* #include "gstcdxastrip.h" */
#include "gstvcdparse.h"
#include <gst/riff/riff-ids.h>
#include <gst/riff/riff-read.h>
GST_DEBUG_CATEGORY (vcdparse_debug);
GST_DEBUG_CATEGORY_STATIC (cdxaparse_debug);
#define GST_CAT_DEFAULT cdxaparse_debug
@ -552,13 +555,15 @@ gst_cdxa_parse_change_state (GstElement * element, GstStateChange transition)
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "cdxaparse", GST_RANK_PRIMARY, GST_TYPE_CDXA_PARSE) /* ||
!gst_element_register (plugin, "cdxastrip", GST_RANK_PRIMARY,
GST_TYPE_CDXASTRIP) */ ) {
return FALSE;
}
GST_DEBUG_CATEGORY_INIT (cdxaparse_debug, "cdxaparse", 0, "CDXA Parser");
GST_DEBUG_CATEGORY_INIT (vcdparse_debug, "vcdparse", 0, "VCD Parser");
if (!gst_element_register (plugin, "cdxaparse", GST_RANK_PRIMARY,
GST_TYPE_CDXA_PARSE))
return FALSE;
if (!gst_element_register (plugin, "vcdparse", GST_RANK_PRIMARY,
GST_TYPE_VCD_PARSE))
return FALSE;
return TRUE;
}

410
gst/cdxaparse/gstcdxastrip.c
View file

@ -1,410 +0,0 @@
/* GStreamer CDXA sync strippper
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <gst/gst.h>
#include "gstcdxastrip.h"
static void gst_cdxastrip_base_init (GstCDXAStripClass * klass);
static void gst_cdxastrip_class_init (GstCDXAStripClass * klass);
static void gst_cdxastrip_init (GstCDXAStrip * cdxastrip);
static const GstEventMask *gst_cdxastrip_get_event_mask (GstPad * pad);
static gboolean gst_cdxastrip_handle_src_event (GstPad * pad, GstEvent * event);
static const GstFormat *gst_cdxastrip_get_src_formats (GstPad * pad);
static const GstQueryType *gst_cdxastrip_get_src_query_types (GstPad * pad);
static gboolean gst_cdxastrip_handle_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value);
static void gst_cdxastrip_chain (GstPad * pad, GstData * data);
static GstStateChangeReturn gst_cdxastrip_change_state (GstElement * element,
GstStateChange transition);
static GstStaticPadTemplate sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-vcd")
);
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, " "systemstream = (boolean) TRUE")
);
static GstElementClass *parent_class = NULL;
GType
gst_cdxastrip_get_type (void)
{
static GType cdxastrip_type = 0;
if (!cdxastrip_type) {
static const GTypeInfo cdxastrip_info = {
sizeof (GstCDXAStripClass),
(GBaseInitFunc) gst_cdxastrip_base_init,
NULL,
(GClassInitFunc) gst_cdxastrip_class_init,
NULL,
NULL,
sizeof (GstCDXAStrip),
0,
(GInstanceInitFunc) gst_cdxastrip_init,
};
cdxastrip_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstCDXAStrip",
&cdxastrip_info, 0);
}
return cdxastrip_type;
}
static void
gst_cdxastrip_base_init (GstCDXAStripClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static const GstElementDetails gst_cdxastrip_details =
GST_ELEMENT_DETAILS ("(S)VCD stream parser",
"Codec/Parser",
"Strip (S)VCD stream from its syncheaders",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template_factory));
gst_element_class_set_details (element_class, &gst_cdxastrip_details);
}
static void
gst_cdxastrip_class_init (GstCDXAStripClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
element_class->change_state = gst_cdxastrip_change_state;
}
static void
gst_cdxastrip_init (GstCDXAStrip * cdxastrip)
{
GST_OBJECT_FLAG_SET (cdxastrip, GST_ELEMENT_EVENT_AWARE);
cdxastrip->sinkpad =
gst_pad_new_from_static_template (&sink_template_factory, "sink");
gst_pad_set_chain_function (cdxastrip->sinkpad, gst_cdxastrip_chain);
gst_element_add_pad (GST_ELEMENT (cdxastrip), cdxastrip->sinkpad);
cdxastrip->srcpad =
gst_pad_new_from_static_template (&src_template_factory, "src");
gst_pad_set_formats_function (cdxastrip->srcpad,
gst_cdxastrip_get_src_formats);
gst_pad_set_event_mask_function (cdxastrip->srcpad,
gst_cdxastrip_get_event_mask);
gst_pad_set_event_function (cdxastrip->srcpad,
gst_cdxastrip_handle_src_event);
gst_pad_set_query_type_function (cdxastrip->srcpad,
gst_cdxastrip_get_src_query_types);
gst_pad_set_query_function (cdxastrip->srcpad,
gst_cdxastrip_handle_src_query);
gst_element_add_pad (GST_ELEMENT (cdxastrip), cdxastrip->srcpad);
}
/*
* Stuff.
*/
static const GstFormat *
gst_cdxastrip_get_src_formats (GstPad * pad)
{
static const GstFormat formats[] = {
GST_FORMAT_BYTES,
0
};
return formats;
}
static const GstQueryType *
gst_cdxastrip_get_src_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
0
};
return types;
}
static gboolean
gst_cdxastrip_handle_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (gst_pad_get_parent (pad));
if (!gst_pad_query (GST_PAD_PEER (cdxa->sinkpad), type, format, value))
return FALSE;
if (*format != GST_FORMAT_BYTES)
return TRUE;
switch (type) {
case GST_QUERY_TOTAL:
case GST_QUERY_POSITION:{
gint num, rest;
num = *value / GST_CDXA_SECTOR_SIZE;
rest = *value % GST_CDXA_SECTOR_SIZE;
*value = num * GST_CDXA_DATA_SIZE;
if (rest > GST_CDXA_HEADER_SIZE) {
if (rest >= GST_CDXA_HEADER_SIZE + GST_CDXA_DATA_SIZE)
*value += GST_CDXA_DATA_SIZE;
else
*value += rest - GST_CDXA_HEADER_SIZE;
}
break;
}
default:
break;
}
return TRUE;
}
static const GstEventMask *
gst_cdxastrip_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT},
{0,}
};
return masks;
}
static gboolean
gst_cdxastrip_handle_src_event (GstPad * pad, GstEvent * event)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_BYTES:{
GstEvent *new;
gint64 off;
gint num, rest;
off = GST_EVENT_SEEK_OFFSET (event);
num = off / GST_CDXA_DATA_SIZE;
rest = off % GST_CDXA_DATA_SIZE;
off = num * GST_CDXA_SECTOR_SIZE;
if (rest > 0)
off += rest + GST_CDXA_HEADER_SIZE;
new = gst_event_new_seek (GST_EVENT_SEEK_TYPE (event), off);
gst_event_unref (event);
event = new;
}
default:
break;
}
break;
default:
break;
}
return gst_pad_send_event (GST_PAD_PEER (cdxa->sinkpad), event);
}
/*
* A sector is 2352 bytes long and is composed of:
*
* ! sync ! header ! subheader ! data ... ! edc !
* ! 12 bytes ! 4 bytes ! 8 bytes ! 2324 bytes ! 4 bytes !
* !-------------------------------------------------------!
*
* We strip the data out of it and send it to the srcpad.
*
* sync : 00 FF FF FF FF FF FF FF FF FF FF 00
* header : hour minute second mode
* sub-header : track channel sub_mode coding repeat (4 bytes)
* edc : checksum
*/
GstBuffer *
gst_cdxastrip_strip (GstBuffer * buf)
{
GstBuffer *sub;
g_assert (GST_BUFFER_SIZE (buf) >= GST_CDXA_SECTOR_SIZE);
/* Skip CDXA headers, only keep data.
* FIXME: check sync, resync, ... */
sub = gst_buffer_create_sub (buf, GST_CDXA_HEADER_SIZE, GST_CDXA_DATA_SIZE);
gst_buffer_unref (buf);
return sub;
}
/*
* -1 = no sync (discard buffer),
* otherwise offset indicates syncpoint in buffer.
*/
gint
gst_cdxastrip_sync (GstBuffer * buf)
{
guint size, off = 0;
guint8 *data;
for (size = GST_BUFFER_SIZE (buf), data = GST_BUFFER_DATA (buf);
size >= 12; size--, data++, off++) {
/* we could do a checksum check as well, but who cares... */
if (!memcmp (data, "\000\377\377\377\377\377\377\377\377\377\377\000", 12))
return off;
}
return -1;
}
/*
* Do stuff.
*/
static void
gst_cdxastrip_handle_event (GstCDXAStrip * cdxa, GstEvent * event)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_DISCONTINUOUS:{
gint64 new_off, off;
if (gst_event_discont_get_value (event, GST_FORMAT_BYTES, &new_off)) {
GstEvent *new;
gint chunknum, rest;
chunknum = new_off / GST_CDXA_SECTOR_SIZE;
rest = new_off % GST_CDXA_SECTOR_SIZE;
off = chunknum * GST_CDXA_DATA_SIZE;
if (rest > GST_CDXA_HEADER_SIZE) {
if (rest >= GST_CDXA_HEADER_SIZE + GST_CDXA_DATA_SIZE)
off += GST_CDXA_DATA_SIZE;
else
off += rest - GST_CDXA_HEADER_SIZE;
}
new = gst_event_new_discontinuous (GST_EVENT_DISCONT_NEW_MEDIA (event),
GST_FORMAT_BYTES, new_off, GST_FORMAT_UNDEFINED);
gst_event_unref (event);
event = new;
}
gst_pad_event_default (cdxa->sinkpad, event);
break;
}
case GST_EVENT_FLUSH:
if (cdxa->cache) {
gst_buffer_unref (cdxa->cache);
cdxa->cache = NULL;
}
/* fall-through */
default:
gst_pad_event_default (cdxa->sinkpad, event);
break;
}
}
static void
gst_cdxastrip_chain (GstPad * pad, GstData * data)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (gst_pad_get_parent (pad));
GstBuffer *buf, *sub;
gint sync;
if (GST_IS_EVENT (data)) {
gst_cdxastrip_handle_event (cdxa, GST_EVENT (data));
return;
}
buf = GST_BUFFER (data);
if (cdxa->cache) {
buf = gst_buffer_join (cdxa->cache, buf);
}
cdxa->cache = NULL;
while (buf && GST_BUFFER_SIZE (buf) >= GST_CDXA_SECTOR_SIZE) {
/* sync */
sync = gst_cdxastrip_sync (buf);
if (sync < 0) {
gst_buffer_unref (buf);
return;
}
sub = gst_buffer_create_sub (buf, sync, GST_BUFFER_SIZE (buf) - sync);
gst_buffer_unref (buf);
buf = sub;
if (GST_BUFFER_SIZE (buf) < GST_CDXA_SECTOR_SIZE)
break;
/* one chunk */
sub = gst_cdxastrip_strip (gst_buffer_ref (buf));
gst_pad_push (cdxa->srcpad, GST_DATA (sub));
/* cache */
if (GST_BUFFER_SIZE (buf) != GST_CDXA_SECTOR_SIZE) {
sub = gst_buffer_create_sub (buf, GST_CDXA_SECTOR_SIZE,
GST_BUFFER_SIZE (buf) - GST_CDXA_SECTOR_SIZE);
} else {
sub = NULL;
}
gst_buffer_unref (buf);
buf = sub;
}
cdxa->cache = buf;
}
static GstStateChangeReturn
gst_cdxastrip_change_state (GstElement * element, GstStateChange transition)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (cdxa->cache) {
gst_buffer_unref (cdxa->cache);
cdxa->cache = NULL;
}
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}

67
gst/cdxaparse/gstcdxastrip.h
View file

@ -1,67 +0,0 @@
/* GStreamer CDXA sync strippper
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.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_CDXASTRIP_H__
#define __GST_CDXASTRIP_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_CDXASTRIP \
(gst_cdxastrip_get_type())
#define GST_CDXASTRIP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CDXASTRIP,GstCDXAStrip))
#define GST_CDXASTRIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CDXASTRIP,GstCDXAStripClass))
#define GST_IS_CDXASTRIP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CDXASTRIP))
#define GST_IS_CDXASTRIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CDXASTRIP))
#define GST_CDXA_SECTOR_SIZE 2352
#define GST_CDXA_DATA_SIZE 2324
#define GST_CDXA_HEADER_SIZE 24
typedef struct _GstCDXAStrip GstCDXAStrip;
typedef struct _GstCDXAStripClass GstCDXAStripClass;
struct _GstCDXAStrip {
GstElement parent;
/* pads */
GstPad *sinkpad, *srcpad;
GstBuffer *cache;
};
struct _GstCDXAStripClass {
GstElementClass parent_class;
};
GType gst_cdxastrip_get_type (void);
/*
* Also useful for CDXAparse.
*/
GstBuffer * gst_cdxastrip_strip (GstBuffer * buf);
gint gst_cdxastrip_sync (GstBuffer * buf);
G_END_DECLS
#endif /* __GST_CDXASTRIP_H__ */

591
gst/cdxaparse/gstvcdparse.c
View file

@ -1,5 +1,6 @@
/* GStreamer CDXA sync strippper
/* GStreamer CDXA sync strippper / VCD parser
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2008 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
@ -22,389 +23,389 @@
#endif
#include <string.h>
#include <gst/gst.h>
#include "gstcdxastrip.h"
static void gst_cdxastrip_base_init (GstCDXAStripClass * klass);
static void gst_cdxastrip_class_init (GstCDXAStripClass * klass);
static void gst_cdxastrip_init (GstCDXAStrip * cdxastrip);
#include "gstvcdparse.h"
static const GstEventMask *gst_cdxastrip_get_event_mask (GstPad * pad);
static gboolean gst_cdxastrip_handle_src_event (GstPad * pad, GstEvent * event);
static const GstFormat *gst_cdxastrip_get_src_formats (GstPad * pad);
static const GstQueryType *gst_cdxastrip_get_src_query_types (GstPad * pad);
static gboolean gst_cdxastrip_handle_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value);
GST_DEBUG_CATEGORY_EXTERN (vcdparse_debug);
#define GST_CAT_DEFAULT vcdparse_debug
static void gst_cdxastrip_chain (GstPad * pad, GstData * data);
static GstStateChangeReturn gst_cdxastrip_change_state (GstElement * element,
static gboolean gst_vcd_parse_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_vcd_parse_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_vcd_parse_src_query (GstPad * pad, GstQuery * query);
static GstFlowReturn gst_vcd_parse_chain (GstPad * pad, GstBuffer * buf);
static GstStateChangeReturn gst_vcd_parse_change_state (GstElement * element,
GstStateChange transition);
static GstStaticPadTemplate sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-vcd")
);
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, " "systemstream = (boolean) TRUE")
GST_STATIC_CAPS ("video/mpeg, systemstream = (boolean) TRUE")
);
static GstElementClass *parent_class = NULL;
GST_BOILERPLATE (GstVcdParse, gst_vcd_parse, GstElement, GST_TYPE_ELEMENT);
GType
gst_cdxastrip_get_type (void)
static void
gst_vcd_parse_base_init (gpointer klass)
{
static GType cdxastrip_type = 0;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
if (!cdxastrip_type) {
static const GTypeInfo cdxastrip_info = {
sizeof (GstCDXAStripClass),
(GBaseInitFunc) gst_cdxastrip_base_init,
NULL,
(GClassInitFunc) gst_cdxastrip_class_init,
NULL,
NULL,
sizeof (GstCDXAStrip),
0,
(GInstanceInitFunc) gst_cdxastrip_init,
};
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
cdxastrip_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstCDXAStrip",
&cdxastrip_info, 0);
gst_element_class_set_details_simple (element_class, "(S)VCD stream parser",
"Codec/Parser", "Strip (S)VCD stream from its sync headers",
"Tim-Philipp Müller <tim centricular net>, "
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
}
static void
gst_vcd_parse_class_init (GstVcdParseClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
element_class->change_state = GST_DEBUG_FUNCPTR (gst_vcd_parse_change_state);
}
static void
gst_vcd_parse_init (GstVcdParse * vcd, GstVcdParseClass * klass)
{
vcd->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_chain_function (vcd->sinkpad,
GST_DEBUG_FUNCPTR (gst_vcd_parse_chain));
gst_pad_set_event_function (vcd->sinkpad,
GST_DEBUG_FUNCPTR (gst_vcd_parse_sink_event));
gst_element_add_pad (GST_ELEMENT (vcd), vcd->sinkpad);
vcd->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_event_function (vcd->srcpad,
GST_DEBUG_FUNCPTR (gst_vcd_parse_src_event));
gst_pad_set_query_function (vcd->srcpad,
GST_DEBUG_FUNCPTR (gst_vcd_parse_src_query));
gst_pad_use_fixed_caps (vcd->srcpad);
gst_pad_set_caps (vcd->srcpad,
gst_static_pad_template_get_caps (&src_factory));
gst_element_add_pad (GST_ELEMENT (vcd), vcd->srcpad);
}
/* These conversion functions assume there's no junk between sectors */
static gint64
gst_vcd_parse_get_out_offset (gint64 in_offset)
{
gint64 out_offset, chunknum, rest;
if (in_offset == -1)
return -1;
if (G_UNLIKELY (in_offset < -1)) {
GST_WARNING ("unexpected/invalid in_offset %" G_GINT64_FORMAT, in_offset);
return in_offset;
}
return cdxastrip_type;
chunknum = in_offset / GST_CDXA_SECTOR_SIZE;
rest = in_offset % GST_CDXA_SECTOR_SIZE;
out_offset = chunknum * GST_CDXA_DATA_SIZE;
if (rest > GST_CDXA_HEADER_SIZE) {
if (rest >= GST_CDXA_HEADER_SIZE + GST_CDXA_DATA_SIZE)
out_offset += GST_CDXA_DATA_SIZE;
else
out_offset += rest - GST_CDXA_HEADER_SIZE;
}
GST_LOG ("transformed in_offset %" G_GINT64_FORMAT " to out_offset %"
G_GINT64_FORMAT, in_offset, out_offset);
return out_offset;
}
static void
gst_cdxastrip_base_init (GstCDXAStripClass * klass)
static gint64
gst_vcd_parse_get_in_offset (gint64 out_offset)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static const GstElementDetails gst_cdxastrip_details =
GST_ELEMENT_DETAILS ("(S)VCD stream parser",
"Codec/Parser",
"Strip (S)VCD stream from its syncheaders",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
gint64 in_offset, chunknum, rest;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template_factory));
if (out_offset == -1)
return -1;
gst_element_class_set_details (element_class, &gst_cdxastrip_details);
}
if (G_UNLIKELY (out_offset < -1)) {
GST_WARNING ("unexpected/invalid out_offset %" G_GINT64_FORMAT, out_offset);
return out_offset;
}
static void
gst_cdxastrip_class_init (GstCDXAStripClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
chunknum = out_offset / GST_CDXA_DATA_SIZE;
rest = out_offset % GST_CDXA_DATA_SIZE;
parent_class = g_type_class_peek_parent (klass);
in_offset = chunknum * GST_CDXA_SECTOR_SIZE;
if (rest > 0)
in_offset += GST_CDXA_HEADER_SIZE + rest;
element_class->change_state = gst_cdxastrip_change_state;
}
GST_LOG ("transformed out_offset %" G_GINT64_FORMAT " to in_offset %"
G_GINT64_FORMAT, out_offset, in_offset);
static void
gst_cdxastrip_init (GstCDXAStrip * cdxastrip)
{
GST_OBJECT_FLAG_SET (cdxastrip, GST_ELEMENT_EVENT_AWARE);
cdxastrip->sinkpad =
gst_pad_new_from_static_template (&sink_template_factory, "sink");
gst_pad_set_chain_function (cdxastrip->sinkpad, gst_cdxastrip_chain);
gst_element_add_pad (GST_ELEMENT (cdxastrip), cdxastrip->sinkpad);
cdxastrip->srcpad =
gst_pad_new_from_static_template (&src_template_factory, "src");
gst_pad_set_formats_function (cdxastrip->srcpad,
gst_cdxastrip_get_src_formats);
gst_pad_set_event_mask_function (cdxastrip->srcpad,
gst_cdxastrip_get_event_mask);
gst_pad_set_event_function (cdxastrip->srcpad,
gst_cdxastrip_handle_src_event);
gst_pad_set_query_type_function (cdxastrip->srcpad,
gst_cdxastrip_get_src_query_types);
gst_pad_set_query_function (cdxastrip->srcpad,
gst_cdxastrip_handle_src_query);
gst_element_add_pad (GST_ELEMENT (cdxastrip), cdxastrip->srcpad);
}
/*
* Stuff.
*/
static const GstFormat *
gst_cdxastrip_get_src_formats (GstPad * pad)
{
static const GstFormat formats[] = {
GST_FORMAT_BYTES,
0
};
return formats;
}
static const GstQueryType *
gst_cdxastrip_get_src_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
0
};
return types;
return in_offset;
}
static gboolean
gst_cdxastrip_handle_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value)
gst_vcd_parse_src_query (GstPad * pad, GstQuery * query)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (gst_pad_get_parent (pad));
GstVcdParse *vcd = GST_VCD_PARSE (gst_pad_get_parent (pad));
gboolean res = FALSE;
if (!gst_pad_query (GST_PAD_PEER (cdxa->sinkpad), type, format, value))
return FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:{
GstFormat format;
gint64 dur;
if (*format != GST_FORMAT_BYTES)
return TRUE;
/* first try upstream */
if (!gst_pad_query_default (pad, query))
break;
switch (type) {
case GST_QUERY_TOTAL:
/* we can only handle BYTES */
gst_query_parse_duration (query, &format, &dur);
if (format != GST_FORMAT_BYTES)
break;
gst_query_set_duration (query, GST_FORMAT_BYTES,
gst_vcd_parse_get_out_offset (dur));
res = TRUE;
break;
}
case GST_QUERY_POSITION:{
gint num, rest;
GstFormat format;
gint64 pos;
num = *value / GST_CDXA_SECTOR_SIZE;
rest = *value % GST_CDXA_SECTOR_SIZE;
/* first try upstream */
if (!gst_pad_query_default (pad, query))
break;
*value = num * GST_CDXA_DATA_SIZE;
if (rest > GST_CDXA_HEADER_SIZE) {
if (rest >= GST_CDXA_HEADER_SIZE + GST_CDXA_DATA_SIZE)
*value += GST_CDXA_DATA_SIZE;
else
*value += rest - GST_CDXA_HEADER_SIZE;
}
/* we can only handle BYTES */
gst_query_parse_position (query, &format, &pos);
if (format != GST_FORMAT_BYTES)
break;
gst_query_set_position (query, GST_FORMAT_BYTES,
gst_vcd_parse_get_out_offset (pos));
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
return TRUE;
}
static const GstEventMask *
gst_cdxastrip_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT},
{0,}
};
return masks;
gst_object_unref (vcd);
return res;
}
static gboolean
gst_cdxastrip_handle_src_event (GstPad * pad, GstEvent * event)
gst_vcd_parse_sink_event (GstPad * pad, GstEvent * event)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (gst_pad_get_parent (pad));
GstVcdParse *vcd = GST_VCD_PARSE (gst_pad_get_parent (pad));
gboolean res;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_BYTES:{
GstEvent *new;
gint64 off;
gint num, rest;
case GST_EVENT_NEWSEGMENT:{
GstFormat format;
gboolean update;
gdouble rate, applied_rate;
gint64 start, stop, position;
off = GST_EVENT_SEEK_OFFSET (event);
num = off / GST_CDXA_DATA_SIZE;
rest = off % GST_CDXA_DATA_SIZE;
off = num * GST_CDXA_SECTOR_SIZE;
if (rest > 0)
off += rest + GST_CDXA_HEADER_SIZE;
new = gst_event_new_seek (GST_EVENT_SEEK_TYPE (event), off);
gst_event_unref (event);
event = new;
}
default:
break;
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
&format, &start, &stop, &position);
if (format == GST_FORMAT_BYTES) {
gst_event_unref (event);
event = gst_event_new_new_segment_full (update, rate, applied_rate,
GST_FORMAT_BYTES, gst_vcd_parse_get_out_offset (start),
gst_vcd_parse_get_out_offset (stop), position);
} else {
GST_WARNING_OBJECT (vcd, "newsegment event in non-byte format");
}
res = gst_pad_event_default (pad, event);
break;
}
case GST_EVENT_FLUSH_START:
gst_adapter_clear (vcd->adapter);
/* fall through */
default:
res = gst_pad_event_default (pad, event);
break;
}
return gst_pad_send_event (GST_PAD_PEER (cdxa->sinkpad), event);
gst_object_unref (vcd);
return res;
}
/*
* A sector is 2352 bytes long and is composed of:
*
* ! sync ! header ! subheader ! data ... ! edc !
* ! 12 bytes ! 4 bytes ! 8 bytes ! 2324 bytes ! 4 bytes !
* !-------------------------------------------------------!
*
* We strip the data out of it and send it to the srcpad.
*
* sync : 00 FF FF FF FF FF FF FF FF FF FF 00
* header : hour minute second mode
* sub-header : track channel sub_mode coding repeat (4 bytes)
* edc : checksum
*/
GstBuffer *
gst_cdxastrip_strip (GstBuffer * buf)
static gboolean
gst_vcd_parse_src_event (GstPad * pad, GstEvent * event)
{
GstBuffer *sub;
GstVcdParse *vcd = GST_VCD_PARSE (gst_pad_get_parent (pad));
gboolean res;
g_assert (GST_BUFFER_SIZE (buf) >= GST_CDXA_SECTOR_SIZE);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
GstSeekType start_type, stop_type;
GstSeekFlags flags;
GstFormat format;
gdouble rate;
gint64 start, stop;
/* Skip CDXA headers, only keep data.
* FIXME: check sync, resync, ... */
sub = gst_buffer_create_sub (buf, GST_CDXA_HEADER_SIZE, GST_CDXA_DATA_SIZE);
gst_buffer_unref (buf);
gst_event_parse_seek (event, &rate, &format, &flags, &start_type,
&start, &stop_type, &stop);
return sub;
}
/*
* -1 = no sync (discard buffer),
* otherwise offset indicates syncpoint in buffer.
*/
gint
gst_cdxastrip_sync (GstBuffer * buf)
{
guint size, off = 0;
guint8 *data;
for (size = GST_BUFFER_SIZE (buf), data = GST_BUFFER_DATA (buf);
size >= 12; size--, data++, off++) {
/* we could do a checksum check as well, but who cares... */
if (!memcmp (data, "\000\377\377\377\377\377\377\377\377\377\377\000", 12))
return off;
if (format == GST_FORMAT_BYTES) {
gst_event_unref (event);
if (start_type != GST_SEEK_TYPE_NONE)
start = gst_vcd_parse_get_in_offset (start);
if (stop_type != GST_SEEK_TYPE_NONE)
stop = gst_vcd_parse_get_in_offset (stop);
event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, start_type,
start, stop_type, stop);
} else {
GST_WARNING_OBJECT (vcd, "seek event in non-byte format");
}
res = gst_pad_event_default (pad, event);
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (vcd);
return res;
}
/* -1 = no sync (discard buffer),
* otherwise offset indicates sync point in buffer */
static gint
gst_vcd_parse_sync (const guint8 * data, guint size)
{
const guint8 sync_marker[12] = { 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00
};
guint off = 0;
while (size >= 12) {
if (memcmp (data, sync_marker, 12) == 0)
return off;
--size;
++data;
++off;
}
return -1;
}
/*
* Do stuff.
*/
static void
gst_cdxastrip_handle_event (GstCDXAStrip * cdxa, GstEvent * event)
static GstFlowReturn
gst_vcd_parse_chain (GstPad * pad, GstBuffer * buf)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_DISCONTINUOUS:{
gint64 new_off, off;
GstVcdParse *vcd = GST_VCD_PARSE (GST_PAD_PARENT (pad));
GstFlowReturn flow = GST_FLOW_OK;
if (gst_event_discont_get_value (event, GST_FORMAT_BYTES, &new_off)) {
GstEvent *new;
gint chunknum, rest;
gst_adapter_push (vcd->adapter, buf);
buf = NULL;
chunknum = new_off / GST_CDXA_SECTOR_SIZE;
rest = new_off % GST_CDXA_SECTOR_SIZE;
off = chunknum * GST_CDXA_DATA_SIZE;
if (rest > GST_CDXA_HEADER_SIZE) {
if (rest >= GST_CDXA_HEADER_SIZE + GST_CDXA_DATA_SIZE)
off += GST_CDXA_DATA_SIZE;
else
off += rest - GST_CDXA_HEADER_SIZE;
}
new = gst_event_new_discontinuous (GST_EVENT_DISCONT_NEW_MEDIA (event),
GST_FORMAT_BYTES, new_off, GST_FORMAT_UNDEFINED);
gst_event_unref (event);
event = new;
}
gst_pad_event_default (cdxa->sinkpad, event);
while (gst_adapter_available (vcd->adapter) >= GST_CDXA_SECTOR_SIZE) {
const guint8 *data;
guint8 header[4 + 8];
gint sync_offset;
/* find sync (we could peek any size though really) */
data = gst_adapter_peek (vcd->adapter, GST_CDXA_SECTOR_SIZE);
sync_offset = gst_vcd_parse_sync (data, GST_CDXA_SECTOR_SIZE);
GST_LOG_OBJECT (vcd, "sync offset = %d", sync_offset);
if (sync_offset < 0) {
gst_adapter_flush (vcd->adapter, GST_CDXA_SECTOR_SIZE - 12);
continue; /* try again */
}
gst_adapter_flush (vcd->adapter, sync_offset);
if (gst_adapter_available (vcd->adapter) < GST_CDXA_SECTOR_SIZE) {
GST_LOG_OBJECT (vcd, "not enough data in adapter, waiting for more");
break;
}
case GST_EVENT_FLUSH:
if (cdxa->cache) {
gst_buffer_unref (cdxa->cache);
cdxa->cache = NULL;
}
/* fall-through */
default:
gst_pad_event_default (cdxa->sinkpad, event);
GST_LOG_OBJECT (vcd, "have full sector");
/* have one sector: a sector is 2352 bytes long and is composed of:
*
* +-------------------------------------------------------+
* ! sync ! header ! subheader ! data ... ! edc !
* ! 12 bytes ! 4 bytes ! 8 bytes ! 2324 bytes ! 4 bytes !
* +-------------------------------------------------------+
*
* We strip the data out of it and send it to the srcpad.
*
* sync : 00 FF FF FF FF FF FF FF FF FF FF 00
* header : hour minute second mode
* sub-header : track channel sub_mode coding repeat (4 bytes)
* edc : checksum
*/
/* Skip CDXA header and edc footer, only keep data in the middle */
gst_adapter_copy (vcd->adapter, header, 12, sizeof (header));
gst_adapter_flush (vcd->adapter, GST_CDXA_HEADER_SIZE);
buf = gst_adapter_take_buffer (vcd->adapter, GST_CDXA_DATA_SIZE);
gst_adapter_flush (vcd->adapter, 4);
/* we could probably do something clever to keep track of buffer offsets */
buf = gst_buffer_make_metadata_writable (buf);
GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
gst_buffer_set_caps (buf, GST_PAD_CAPS (vcd->srcpad));
flow = gst_pad_push (vcd->srcpad, buf);
buf = NULL;
if (G_UNLIKELY (flow != GST_FLOW_OK)) {
GST_DEBUG_OBJECT (vcd, "flow: %s", gst_flow_get_name (flow));
break;
}
}
static void
gst_cdxastrip_chain (GstPad * pad, GstData * data)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (gst_pad_get_parent (pad));
GstBuffer *buf, *sub;
gint sync;
if (GST_IS_EVENT (data)) {
gst_cdxastrip_handle_event (cdxa, GST_EVENT (data));
return;
}
buf = GST_BUFFER (data);
if (cdxa->cache) {
buf = gst_buffer_join (cdxa->cache, buf);
}
cdxa->cache = NULL;
while (buf && GST_BUFFER_SIZE (buf) >= GST_CDXA_SECTOR_SIZE) {
/* sync */
sync = gst_cdxastrip_sync (buf);
if (sync < 0) {
gst_buffer_unref (buf);
return;
}
sub = gst_buffer_create_sub (buf, sync, GST_BUFFER_SIZE (buf) - sync);
gst_buffer_unref (buf);
buf = sub;
if (GST_BUFFER_SIZE (buf) < GST_CDXA_SECTOR_SIZE)
break;
/* one chunk */
sub = gst_cdxastrip_strip (gst_buffer_ref (buf));
gst_pad_push (cdxa->srcpad, GST_DATA (sub));
/* cache */
if (GST_BUFFER_SIZE (buf) != GST_CDXA_SECTOR_SIZE) {
sub = gst_buffer_create_sub (buf, GST_CDXA_SECTOR_SIZE,
GST_BUFFER_SIZE (buf) - GST_CDXA_SECTOR_SIZE);
} else {
sub = NULL;
}
gst_buffer_unref (buf);
buf = sub;
}
cdxa->cache = buf;
return flow;
}
static GstStateChangeReturn
gst_cdxastrip_change_state (GstElement * element, GstStateChange transition)
gst_vcd_parse_change_state (GstElement * element, GstStateChange transition)
{
GstCDXAStrip *cdxa = GST_CDXASTRIP (element);
GstStateChangeReturn res = GST_STATE_CHANGE_SUCCESS;
GstVcdParse *vcd = GST_VCD_PARSE (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
vcd->adapter = gst_adapter_new ();
break;
default:
break;
}
res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (cdxa->cache) {
gst_buffer_unref (cdxa->cache);
cdxa->cache = NULL;
case GST_STATE_CHANGE_READY_TO_NULL:
if (vcd->adapter) {
g_object_unref (vcd->adapter);
vcd->adapter = NULL;
}
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
return res;
}

57
gst/cdxaparse/gstvcdparse.h
View file

@ -1,5 +1,6 @@
/* GStreamer CDXA sync strippper
/* GStreamer CDXA sync strippper / VCD parser
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2008 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
@ -17,51 +18,47 @@
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_CDXASTRIP_H__
#define __GST_CDXASTRIP_H__
#ifndef __GST_VCD_PARSE_H__
#define __GST_VCD_PARSE_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
G_BEGIN_DECLS
#define GST_TYPE_CDXASTRIP \
(gst_cdxastrip_get_type())
#define GST_CDXASTRIP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CDXASTRIP,GstCDXAStrip))
#define GST_CDXASTRIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CDXASTRIP,GstCDXAStripClass))
#define GST_IS_CDXASTRIP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CDXASTRIP))
#define GST_IS_CDXASTRIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CDXASTRIP))
#define GST_TYPE_VCD_PARSE \
(gst_vcd_parse_get_type())
#define GST_VCD_PARSE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VCD_PARSE,GstVcdParse))
#define GST_VCD_PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VCD_PARSE,GstVcdParseClass))
#define GST_IS_VCD_PARSE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VCD_PARSE))
#define GST_IS_VCD_PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VCD_PARSE))
#define GST_CDXA_SECTOR_SIZE 2352
#define GST_CDXA_DATA_SIZE 2324
#define GST_CDXA_HEADER_SIZE 24
typedef struct _GstCDXAStrip GstCDXAStrip;
typedef struct _GstCDXAStripClass GstCDXAStripClass;
typedef struct _GstVcdParse GstVcdParse;
typedef struct _GstVcdParseClass GstVcdParseClass;
struct _GstCDXAStrip {
GstElement parent;
struct _GstVcdParse {
GstElement element;
/* pads */
GstPad *sinkpad, *srcpad;
GstBuffer *cache;
GstPad *sinkpad;
GstPad *srcpad;
GstAdapter *adapter;
};
struct _GstCDXAStripClass {
GstElementClass parent_class;
struct _GstVcdParseClass {
GstElementClass element_class;
};
GType gst_cdxastrip_get_type (void);
/*
* Also useful for CDXAparse.
*/
GstBuffer * gst_cdxastrip_strip (GstBuffer * buf);
gint gst_cdxastrip_sync (GstBuffer * buf);
GType gst_vcd_parse_get_type (void);
G_END_DECLS
#endif /* __GST_CDXASTRIP_H__ */
#endif /* __GST_VCD_PARSE_H__ */