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[gst-cvs] CVS: gst-plugins/gst/mpeg1videoparse Makefile.am,NONE,1.1 gstmp1videoparse.c,NONE,1.1 gstmp1videoparse.h,NONE,1.1
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From: Wim T. <wt...@us...> - 2001-12-28 01:47:50
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Update of /cvsroot/gstreamer/gst-plugins/gst/mpeg1videoparse
In directory usw-pr-cvs1:/tmp/cvs-serv28090/mpeg1videoparse
Added Files:
Makefile.am gstmp1videoparse.c gstmp1videoparse.h
Log Message:
Revived the mpeg1 video parser, probably badly broken but anyway..
--- NEW FILE: Makefile.am ---
plugindir = $(libdir)/gst
plugin_LTLIBRARIES = libgstmp1videoparse.la
libgstmp1videoparse_la_SOURCES = gstmp1videoparse.c
libgstmp1videoparse_la_CFLAGS = $(GST_CFLAGS) -O3 $(FOMIT_FRAME_POINTER) -ffast-math
libgstmp1videoparse_la_LIBADD = $(GST_LIBS)
noinst_HEADERS = gstmp1videoparse.h
--- NEW FILE: gstmp1videoparse.c ---
/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <om...@cs...>
*
* 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.
*/
//#define GST_DEBUG_ENABLED
#include "gstmp1videoparse.h"
/* Start codes. */
#define SEQ_START_CODE 0x000001b3
#define GOP_START_CODE 0x000001b8
#define PICTURE_START_CODE 0x00000100
#define SLICE_MIN_START_CODE 0x00000101
#define SLICE_MAX_START_CODE 0x000001af
#define EXT_START_CODE 0x000001b5
#define USER_START_CODE 0x000001b2
#define SEQUENCE_ERROR_CODE 0x000001b4
#define SEQ_END_CODE 0x000001b7
/* elementfactory information */
static GstElementDetails mp1videoparse_details = {
"MPEG 1 Video Parser",
"Filter/Parser/Video",
"Parses and frames MPEG 1 video streams, provides seek",
VERSION,
"Wim Taymans <wim...@ch...>",
"(C) 2000",
};
static GstPadTemplate*
src_factory (void)
{
return
gst_padtemplate_new (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
gst_caps_new (
"mp1videoparse_src",
"video/mpeg",
gst_props_new (
"mpegversion", GST_PROPS_INT (1),
"systemstream", GST_PROPS_BOOLEAN (FALSE),
"sliced", GST_PROPS_BOOLEAN (TRUE),
NULL)),
NULL);
}
static GstPadTemplate*
sink_factory (void)
{
return
gst_padtemplate_new (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
gst_caps_new (
"mp1videoparse_sink",
"video/mpeg",
gst_props_new (
"mpegversion", GST_PROPS_INT (1),
"systemstream", GST_PROPS_BOOLEAN (FALSE),
NULL)),
NULL);
}
/* Mp1VideoParse signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_mp1videoparse_class_init (Mp1VideoParseClass *klass);
static void gst_mp1videoparse_init (Mp1VideoParse *mp1videoparse);
static void gst_mp1videoparse_chain (GstPad *pad, GstBuffer *buf);
static void gst_mp1videoparse_real_chain (Mp1VideoParse *mp1videoparse, GstBuffer *buf, GstPad *outpad);
static void gst_mp1videoparse_flush (Mp1VideoParse *mp1videoparse);
static GstPadTemplate *src_template, *sink_template;
static GstElementClass *parent_class = NULL;
//static guint gst_mp1videoparse_signals[LAST_SIGNAL] = { 0 };
GType
mp1videoparse_get_type (void)
{
static GType mp1videoparse_type = 0;
if (!mp1videoparse_type) {
static const GTypeInfo mp1videoparse_info = {
sizeof(Mp1VideoParseClass), NULL,
NULL,
(GClassInitFunc)gst_mp1videoparse_class_init,
NULL,
NULL,
sizeof(Mp1VideoParse),
0,
(GInstanceInitFunc)gst_mp1videoparse_init,
};
mp1videoparse_type = g_type_register_static(GST_TYPE_ELEMENT, "Mp1VideoParse", &mp1videoparse_info, 0);
}
return mp1videoparse_type;
}
static void
gst_mp1videoparse_class_init (Mp1VideoParseClass *klass)
{
GstElementClass *gstelement_class;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
}
static void
gst_mp1videoparse_init (Mp1VideoParse *mp1videoparse)
{
mp1videoparse->sinkpad = gst_pad_new_from_template (sink_template, "sink");
gst_pad_set_caps (mp1videoparse->sinkpad, gst_pad_get_padtemplate_caps (mp1videoparse->sinkpad));
gst_element_add_pad(GST_ELEMENT(mp1videoparse),mp1videoparse->sinkpad);
gst_pad_set_chain_function(mp1videoparse->sinkpad,gst_mp1videoparse_chain);
mp1videoparse->srcpad = gst_pad_new_from_template (src_template, "src");
gst_pad_set_caps (mp1videoparse->srcpad, gst_pad_get_padtemplate_caps (mp1videoparse->srcpad));
gst_element_add_pad(GST_ELEMENT(mp1videoparse),mp1videoparse->srcpad);
mp1videoparse->partialbuf = NULL;
mp1videoparse->need_resync = FALSE;
mp1videoparse->last_pts = 0;
mp1videoparse->picture_in_buffer = 0;
}
static gboolean
mp1videoparse_valid_sync (gulong head)
{
if (head == SEQ_START_CODE)
return TRUE;
if (head == GOP_START_CODE)
return TRUE;
if (head == PICTURE_START_CODE)
return TRUE;
if (head >= SLICE_MIN_START_CODE &&
head <= SLICE_MAX_START_CODE)
return TRUE;
if (head == USER_START_CODE)
return TRUE;
if (head == EXT_START_CODE)
return TRUE;
return FALSE;
}
static gint
mp1videoparse_find_next_gop (Mp1VideoParse *mp1videoparse, GstBuffer *buf)
{
guchar *data = GST_BUFFER_DATA(buf);
gulong size = GST_BUFFER_SIZE(buf);
gulong offset = 0;
gint sync_zeros = 0;
gboolean have_sync = FALSE;
while (offset < size) {
guchar byte = *(data+offset);
offset++;
if (byte == 0) {
sync_zeros++;
}
else if (byte == 1 && sync_zeros >=2 ) {
sync_zeros = 0;
have_sync = TRUE;
}
else if (have_sync) {
if (byte == (SEQ_START_CODE & 0xff) || byte == (GOP_START_CODE & 0xff)) return offset-4;
else {
sync_zeros = 0;
have_sync = FALSE;
}
}
else {
sync_zeros = 0;
}
}
return -1;
}
static void
gst_mp1videoparse_flush (Mp1VideoParse *mp1videoparse)
{
GST_DEBUG (0,"mp1videoparse: flushing\n");
if (mp1videoparse->partialbuf) {
gst_buffer_unref(mp1videoparse->partialbuf);
mp1videoparse->partialbuf= NULL;
}
mp1videoparse->need_resync = TRUE;
mp1videoparse->in_flush = TRUE;
mp1videoparse->picture_in_buffer = 0;
}
static void
gst_mp1videoparse_chain (GstPad *pad,GstBuffer *buf)
{
Mp1VideoParse *mp1videoparse;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
mp1videoparse = GST_MP1VIDEOPARSE (GST_OBJECT_PARENT (pad));
gst_mp1videoparse_real_chain(mp1videoparse, buf, mp1videoparse->srcpad);
}
static void
gst_mp1videoparse_real_chain (Mp1VideoParse *mp1videoparse, GstBuffer *buf, GstPad *outpad)
{
guchar *data;
gulong size, offset = 0;
GstBuffer *outbuf;
gint sync_state;
gboolean have_sync;
guchar sync_byte;
gulong head;
gint sync_pos;
guint64 time_stamp;
GstBuffer *temp;
// g_return_if_fail(GST_IS_BUFFER(buf));
time_stamp = GST_BUFFER_TIMESTAMP(buf);
if (GST_BUFFER_FLAG_IS_SET(buf, GST_BUFFER_FLUSH)) {
gst_mp1videoparse_flush(mp1videoparse);
}
if (mp1videoparse->partialbuf) {
offset = GST_BUFFER_SIZE(mp1videoparse->partialbuf);
mp1videoparse->partialbuf = gst_buffer_append(mp1videoparse->partialbuf, buf);
gst_buffer_unref(buf);
}
else {
mp1videoparse->partialbuf = buf;
offset = 0;
}
data = GST_BUFFER_DATA(mp1videoparse->partialbuf);
size = GST_BUFFER_SIZE(mp1videoparse->partialbuf);
GST_DEBUG (0,"mp1videoparse: received buffer of %ld bytes %lld\n",size, GST_BUFFER_TIMESTAMP(buf));
head = GULONG_FROM_BE(*((gulong *)data));
GST_DEBUG (0,"mp1videoparse: head is %08lx\n", head);
if (!mp1videoparse_valid_sync(head) || mp1videoparse->need_resync) {
sync_pos = mp1videoparse_find_next_gop(mp1videoparse, mp1videoparse->partialbuf);
if (sync_pos != -1) {
mp1videoparse->need_resync = FALSE;
GST_DEBUG (0,"mp1videoparse: found new gop at %d\n", sync_pos);
if (sync_pos != 0) {
temp = gst_buffer_create_sub(mp1videoparse->partialbuf, sync_pos, size-sync_pos);
g_assert(temp != NULL);
gst_buffer_unref(mp1videoparse->partialbuf);
mp1videoparse->partialbuf = temp;
data = GST_BUFFER_DATA(mp1videoparse->partialbuf);
size = GST_BUFFER_SIZE(mp1videoparse->partialbuf);
offset = 0;
}
}
else {
GST_DEBUG (0,"mp1videoparse: could not sync\n");
gst_buffer_unref(mp1videoparse->partialbuf);
mp1videoparse->partialbuf = NULL;
return;
}
}
if (mp1videoparse->picture_in_buffer == 1) {
mp1videoparse->last_pts = time_stamp;
}
sync_state = 0;
have_sync = FALSE;
GST_DEBUG (0,"mp1videoparse: searching sync\n");
while (offset < size-1) {
sync_byte = *(data + offset);
//printf(" %d %02x\n", offset, sync_byte);
if (sync_byte == 0) {
sync_state++;
}
else if ((sync_byte == 1) && (sync_state >=2)) {
GST_DEBUG (0,"mp1videoparse: code 0x000001%02x\n",data[offset+1]);
if (data[offset+1] == (PICTURE_START_CODE & 0xff)) {
mp1videoparse->picture_in_buffer++;
if (mp1videoparse->picture_in_buffer == 1) {
mp1videoparse->last_pts = time_stamp;
sync_state = 0;
}
else if (mp1videoparse->picture_in_buffer == 2) {
have_sync = TRUE;
break;
}
else {
GST_DEBUG (0,"mp1videoparse: %d in buffer\n", mp1videoparse->picture_in_buffer);
g_assert_not_reached();
}
}
else sync_state = 0;
}
// something else...
else sync_state = 0;
// go down the buffer
offset++;
}
if (have_sync) {
offset -= 2;
GST_DEBUG (0,"mp1videoparse: synced at %ld code 0x000001%02x\n",offset,data[offset+3]);
outbuf = gst_buffer_create_sub(mp1videoparse->partialbuf, 0, offset+4);
g_assert(outbuf != NULL);
GST_BUFFER_TIMESTAMP(outbuf) = mp1videoparse->last_pts;
if (mp1videoparse->in_flush) {
GST_BUFFER_FLAG_SET(outbuf, GST_BUFFER_FLUSH);
mp1videoparse->in_flush = FALSE;
}
GST_DEBUG (0,"mp1videoparse: pushing %d bytes %llu\n", GST_BUFFER_SIZE(outbuf), GST_BUFFER_TIMESTAMP(outbuf));
gst_pad_push(outpad, outbuf);
GST_DEBUG (0,"mp1videoparse: pushing done\n");
mp1videoparse->picture_in_buffer = 0;
temp = gst_buffer_create_sub(mp1videoparse->partialbuf, offset, size-offset);
gst_buffer_unref(mp1videoparse->partialbuf);
mp1videoparse->partialbuf = temp;
}
else {
mp1videoparse->last_pts = time_stamp;
}
}
/* FIXME
static GstElementStateReturn
gst_mp1videoparse_change_state (GstElement *element)
{
Mp1VideoParse *mp1videoparse;
g_return_val_if_fail(GST_IS_MP1VIDEOPARSE(element),GST_STATE_FAILURE);
mp1videoparse = GST_MP1VIDEOPARSE(element);
GST_DEBUG (0,"mp1videoparse: state pending %d\n", GST_STATE_PENDING(element));
// if going down into NULL state, clear out buffers
if (GST_STATE_PENDING(element) == GST_STATE_READY) {
gst_mp1videoparse_flush(mp1videoparse);
}
// if we haven't failed already, give the parent class a chance to ;-)
if (GST_ELEMENT_CLASS(parent_class)->change_state)
return GST_ELEMENT_CLASS(parent_class)->change_state(element);
return GST_STATE_SUCCESS;
}
*/
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the mp1videoparse element */
factory = gst_elementfactory_new("mp1videoparse",GST_TYPE_MP1VIDEOPARSE,
&mp1videoparse_details);
g_return_val_if_fail(factory != NULL, FALSE);
src_template = src_factory ();
gst_elementfactory_add_padtemplate (factory, src_template);
sink_template = sink_factory ();
gst_elementfactory_add_padtemplate (factory, sink_template);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mp1videoparse",
plugin_init
};
--- NEW FILE: gstmp1videoparse.h ---
/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <om...@cs...>
*
* 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 __MP1VIDEOPARSE_H__
#define __MP1VIDEOPARSE_H__
#include <config.h>
#include <gst/gst.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_MP1VIDEOPARSE \
(mp1videoparse_get_type())
#define GST_MP1VIDEOPARSE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MP1VIDEOPARSE,Mp1VideoParse))
#define GST_MP1VIDEOPARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MP1VIDEOPARSE,Mp1VideoParse))
#define GST_IS_MP1VIDEOPARSE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MP1VIDEOPARSE))
#define GST_IS_MP1VIDEOPARSE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MP1VIDEOPARSE))
typedef struct _Mp1VideoParse Mp1VideoParse;
typedef struct _Mp1VideoParseClass Mp1VideoParseClass;
struct _Mp1VideoParse {
GstElement element;
GstPad *sinkpad,*srcpad;
GstBuffer *partialbuf; // previous buffer (if carryover)
gulong next_buffer_offset;
gboolean need_resync;
gboolean in_flush;
guint64 last_pts;
gint picture_in_buffer;
};
struct _Mp1VideoParseClass {
GstElementClass parent_class;
};
GType gst_mp1videoparse_get_type(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __MP1VIDEOPARSE_H__ */
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