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Added the beginnings of an RFC 2250 compliant packetizer.

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Original commit message from CVS:
Added the beginnings of an RFC 2250 compliant packetizer.
This commit is contained in:
Wim Taymans 2001-12-31 03:03:05 +00:00
parent 14db405c9e
commit 614da644e4
7 changed files with 525 additions and 24 deletions
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4
gst/mpegstream/Makefile.am
View file

@ -2,10 +2,10 @@ plugindir = $(libdir)/gst
plugin_LTLIBRARIES = libgstmpegstream.la
libgstmpegstream_la_SOURCES = gstmpegstream.c gstmpegparse.c gstmpegdemux.c gstmpegpacketize.c
libgstmpegstream_la_SOURCES = gstmpegstream.c gstmpegparse.c gstmpegdemux.c gstmpegpacketize.c gstrfc2250enc.c
libgstmpegstream_la_CFLAGS = $(GST_CFLAGS) -O3 $(FOMIT_FRAME_POINTER) -ffast-math
libgstmpegstream_la_LIBADD = $(GST_LIBS)
noinst_HEADERS = gstmpegparse.h gstmpegdemux.h gstmpegpacketize.h
noinst_HEADERS = gstmpegparse.h gstmpegdemux.h gstmpegpacketize.h gstrfc2250enc.h
EXTRA_DIST = README notes

86
gst/mpegstream/gstmpegpacketize.c
View file

@ -22,7 +22,7 @@
#include <gstmpegpacketize.h>
GstMPEGPacketize*
gst_mpeg_packetize_new (GstPad *pad)
gst_mpeg_packetize_new (GstPad *pad, GstMPEGPacketizeType type)
{
GstMPEGPacketize *new;
@ -36,6 +36,7 @@ gst_mpeg_packetize_new (GstPad *pad)
new->pad = pad;
new->bs = gst_bytestream_new (pad);
new->MPEG2 = FALSE;
new->type = type;
return new;
}
@ -108,6 +109,43 @@ parse_generic (GstMPEGPacketize *packetize)
return GST_DATA (outbuf);
}
static inline GstData*
parse_chunk (GstMPEGPacketize *packetize)
{
GstByteStream *bs = packetize->bs;
guchar *buf;
gint offset;
guint32 code;
const gint chunksize = 4096;
GstBuffer *outbuf = NULL;
buf = gst_bytestream_peek_bytes (bs, chunksize);
if (!buf)
return FALSE;
offset = 4;
code = GUINT32_FROM_BE (*((guint32 *)(buf+offset)));
GST_DEBUG (0, "code = %08x\n", code);
while ((code & 0xffffff00) != 0x100L) {
code = (code << 8) | buf[offset++];
GST_DEBUG (0, " code = %08x\n", code);
if ((offset % chunksize) == 0) {
buf = gst_bytestream_peek_bytes (bs, offset + chunksize);
if (!buf)
return NULL;
}
}
if (offset > 4) {
outbuf = gst_bytestream_read (bs, offset-4);
}
return GST_DATA (outbuf);
}
/* FIXME mmx-ify me */
static inline gboolean
find_start_code (GstMPEGPacketize *packetize)
@ -123,7 +161,7 @@ find_start_code (GstMPEGPacketize *packetize)
return FALSE;
offset = 4;
code = GUINT32_FROM_BE (*((guint32 *)buf));
code = GUINT32_FROM_BE (*((guint32 *)(buf)));
GST_DEBUG (0, "code = %08x\n", code);
@ -160,27 +198,35 @@ gst_mpeg_packetize_read (GstMPEGPacketize *packetize)
if (!find_start_code (packetize))
got_event = TRUE;
else {
GST_DEBUG (0, "packetize: have chunk 0x%02X\n",packetize->id);
switch (packetize->id) {
case 0xBA:
outbuf = parse_packhead (packetize);
if (!outbuf)
got_event = TRUE;
break;
case 0xBB:
outbuf = parse_generic (packetize);
if (!outbuf)
got_event = TRUE;
break;
default:
if (packetize->MPEG2 && ((packetize->id < 0xBD) || (packetize->id > 0xFE))) {
g_warning ("packetize: ******** unknown id 0x%02X",packetize->id);
}
else {
GST_DEBUG (0, "packetize: have chunk 0x%02X\n", packetize->id);
if (packetize->type == GST_MPEG_PACKETIZE_SYSTEM) {
switch (packetize->id) {
case PACK_START_CODE:
outbuf = parse_packhead (packetize);
if (!outbuf)
got_event = TRUE;
break;
case SYS_HEADER_START_CODE:
outbuf = parse_generic (packetize);
if (!outbuf)
got_event = TRUE;
}
break;
default:
if (packetize->MPEG2 && ((packetize->id < 0xBD) || (packetize->id > 0xFE))) {
g_warning ("packetize: ******** unknown id 0x%02X",packetize->id);
}
else {
outbuf = parse_generic (packetize);
if (!outbuf)
got_event = TRUE;
}
}
}
else if (packetize->type == GST_MPEG_PACKETIZE_VIDEO) {
outbuf = parse_chunk (packetize);
}
else {
g_assert_not_reached ();
}
}

20
gst/mpegstream/gstmpegpacketize.h
View file

@ -31,12 +31,29 @@
extern "C" {
#endif /* __cplusplus */
#define PICTURE_START_CODE 0x00
#define SLICE_MIN_START_CODE 0x01
#define SLICE_MAX_START_CODE 0xaf
#define USER_START_CODE 0xb2
#define SEQUENCE_START_CODE 0xb3
#define SEQUENCE_ERROR_START_CODE 0xb4
#define EXT_START_CODE 0xb5
#define SEQUENCE_END_START_CODE 0xb7
#define GOP_START_CODE 0xb8
#define ISO11172_END_START_CODE 0xb9
#define PACK_START_CODE 0xba
#define SYS_HEADER_START_CODE 0xbb
typedef struct _GstMPEGPacketize GstMPEGPacketize;
#define GST_MPEG_PACKETIZE_ID(pack) ((pack)->id)
#define GST_MPEG_PACKETIZE_IS_MPEG2(pack) ((pack)->MPEG2)
typedef enum {
GST_MPEG_PACKETIZE_SYSTEM,
GST_MPEG_PACKETIZE_VIDEO,
} GstMPEGPacketizeType;
struct _GstMPEGPacketize {
/* current parse state */
@ -44,11 +61,12 @@ struct _GstMPEGPacketize {
GstPad *pad;
GstByteStream *bs;
GstMPEGPacketizeType type;
gboolean MPEG2;
};
GstMPEGPacketize* gst_mpeg_packetize_new (GstPad *pad);
GstMPEGPacketize* gst_mpeg_packetize_new (GstPad *pad, GstMPEGPacketizeType type);
void gst_mpeg_packetize_destroy (GstMPEGPacketize *packetize);
GstData* gst_mpeg_packetize_read (GstMPEGPacketize *packetize);

2
gst/mpegstream/gstmpegparse.c
View file

@ -304,7 +304,7 @@ gst_mpeg_parse_change_state (GstElement *element)
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
if (!mpeg_parse->packetize) {
mpeg_parse->packetize = gst_mpeg_packetize_new (mpeg_parse->sinkpad);
mpeg_parse->packetize = gst_mpeg_packetize_new (mpeg_parse->sinkpad, GST_MPEG_PACKETIZE_SYSTEM);
}
break;
case GST_STATE_READY_TO_NULL:

2
gst/mpegstream/gstmpegstream.c
View file

@ -20,12 +20,14 @@
#include "gstmpegparse.h"
#include "gstmpegdemux.h"
#include "gstrfc2250enc.h"
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
gst_mpeg_parse_plugin_init (module, plugin);
gst_mpeg_demux_plugin_init (module, plugin);
gst_rfc2250_enc_plugin_init (module, plugin);
return TRUE;
}

346
gst/mpegstream/gstrfc2250enc.c Normal file
View file

@ -0,0 +1,346 @@
/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 "gstrfc2250enc.h"
/* elementfactory information */
static GstElementDetails rfc2250_enc_details = {
"RFC 2250 packet encoder",
"Filter/Parser/System",
"transforms MPEG1/2 video to an RFC 2250 compliant format",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2001",
};
#define CLASS(o) GST_RFC2250_ENC_CLASS (G_OBJECT_GET_CLASS (o))
/* GstRFC2250Enc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_BIT_RATE,
ARG_MPEG2,
/* FILL ME */
};
GST_PADTEMPLATE_FACTORY (sink_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"rfc2250_enc_sink",
"video/mpeg",
"mpegversion", GST_PROPS_INT_RANGE (1, 2),
"systemstream", GST_PROPS_BOOLEAN (FALSE)
)
);
GST_PADTEMPLATE_FACTORY (src_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"rfc2250_enc_src",
"video/mpeg",
"mpegversion", GST_PROPS_INT_RANGE (1, 2),
"systemstream", GST_PROPS_BOOLEAN (FALSE)
)
);
static void gst_rfc2250_enc_class_init (GstRFC2250EncClass *klass);
static void gst_rfc2250_enc_init (GstRFC2250Enc *rfc2250_enc);
static GstElementStateReturn
gst_rfc2250_enc_change_state (GstElement *element);
static gboolean gst_rfc2250_enc_parse_packhead (GstRFC2250Enc *rfc2250_enc, GstBuffer *buffer);
static void gst_rfc2250_enc_send_data (GstRFC2250Enc *rfc2250_enc, GstData *data);
static void gst_rfc2250_enc_loop (GstElement *element);
static void gst_rfc2250_enc_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static GstElementClass *parent_class = NULL;
/*static guint gst_rfc2250_enc_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_rfc2250_enc_get_type (void)
{
static GType rfc2250_enc_type = 0;
if (!rfc2250_enc_type) {
static const GTypeInfo rfc2250_enc_info = {
sizeof(GstRFC2250EncClass), NULL,
NULL,
(GClassInitFunc)gst_rfc2250_enc_class_init,
NULL,
NULL,
sizeof(GstRFC2250Enc),
0,
(GInstanceInitFunc)gst_rfc2250_enc_init,
};
rfc2250_enc_type = g_type_register_static(GST_TYPE_ELEMENT, "GstRFC2250Enc", &rfc2250_enc_info, 0);
}
return rfc2250_enc_type;
}
static void
gst_rfc2250_enc_class_init (GstRFC2250EncClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BIT_RATE,
g_param_spec_uint("bit_rate","bit_rate","bit_rate",
0, G_MAXUINT, 0, G_PARAM_READABLE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MPEG2,
g_param_spec_boolean ("mpeg2", "mpeg2", "is this an mpeg2 stream",
FALSE, G_PARAM_READABLE));
gobject_class->get_property = gst_rfc2250_enc_get_property;
gstelement_class->change_state = gst_rfc2250_enc_change_state;
}
static void
gst_rfc2250_enc_init (GstRFC2250Enc *rfc2250_enc)
{
rfc2250_enc->sinkpad = gst_pad_new_from_template(
GST_PADTEMPLATE_GET (sink_factory), "sink");
gst_element_add_pad(GST_ELEMENT(rfc2250_enc),rfc2250_enc->sinkpad);
gst_element_set_loop_function (GST_ELEMENT (rfc2250_enc), gst_rfc2250_enc_loop);
rfc2250_enc->srcpad = gst_pad_new_from_template(
GST_PADTEMPLATE_GET (src_factory), "src");
gst_element_add_pad(GST_ELEMENT(rfc2250_enc),rfc2250_enc->srcpad);
/* initialize parser state */
rfc2250_enc->packetize = NULL;
rfc2250_enc->next_ts = 0;
rfc2250_enc->packet = 0;
/* zero counters (should be done at RUNNING?) */
rfc2250_enc->bit_rate = 0;
rfc2250_enc->MTU = 3048;
GST_FLAG_SET (rfc2250_enc, GST_ELEMENT_EVENT_AWARE);
}
static void
gst_rfc2250_enc_new_buffer (GstRFC2250Enc *enc)
{
if (enc->packet) {
gst_pad_push (enc->srcpad, enc->packet);
}
enc->packet = gst_buffer_new ();
enc->flags = 0;
enc->remaining = enc->MTU;
}
static void
gst_rfc2250_enc_add_slice (GstRFC2250Enc *enc, GstBuffer *buffer)
{
gint slice_length = GST_BUFFER_SIZE (buffer);
/* see if the slice fits in the current buffer */
if (slice_length <= enc->remaining) {
gst_buffer_append (enc->packet, buffer);
gst_buffer_unref (buffer);
enc->remaining -= slice_length;
}
/* it doesn't fit */
else {
/* do we need to start a new packet? */
if (slice_length <= enc->MTU) {
gst_rfc2250_enc_new_buffer (enc);
gst_buffer_append (enc->packet, buffer);
gst_buffer_unref (buffer);
enc->remaining -= slice_length;
}
/* else we have to fragment */
else {
gint offset = 0;
while (slice_length > 0) {
GstBuffer *outbuf;
outbuf = gst_buffer_create_sub (buffer, offset, MIN (enc->remaining, slice_length));
gst_buffer_append (enc->packet, outbuf);
slice_length -= GST_BUFFER_SIZE (outbuf);
offset += GST_BUFFER_SIZE (outbuf);
gst_buffer_unref (outbuf);
gst_rfc2250_enc_new_buffer (enc);
}
gst_buffer_unref (buffer);
}
}
}
static void
gst_rfc2250_enc_loop (GstElement *element)
{
GstRFC2250Enc *enc = GST_RFC2250_ENC (element);
GstData *data;
guint id;
gboolean mpeg2;
data = gst_mpeg_packetize_read (enc->packetize);
id = GST_MPEG_PACKETIZE_ID (enc->packetize);
mpeg2 = GST_MPEG_PACKETIZE_IS_MPEG2 (enc->packetize);
if (GST_IS_BUFFER (data)) {
GstBuffer *buffer = GST_BUFFER (data);
GST_DEBUG (0, "rfc2250enc: have chunk 0x%02X\n", id);
switch (id) {
case SEQUENCE_START_CODE:
gst_rfc2250_enc_new_buffer (enc);
enc->flags |= ENC_HAVE_SEQ;
break;
case GOP_START_CODE:
if (enc->flags & ENC_HAVE_DATA) {
gst_rfc2250_enc_new_buffer (enc);
}
enc->flags |= ENC_HAVE_GOP;
break;
case PICTURE_START_CODE:
if (enc->flags & ENC_HAVE_DATA) {
gst_rfc2250_enc_new_buffer (enc);
}
enc->flags |= ENC_HAVE_PIC;
break;
case EXT_START_CODE:
break;
case SLICE_MIN_START_CODE ... SLICE_MAX_START_CODE:
enc->flags |= ENC_HAVE_DATA;
gst_rfc2250_enc_add_slice (enc, buffer);
buffer = NULL;
break;
case USER_START_CODE:
case SEQUENCE_ERROR_START_CODE:
case SEQUENCE_END_START_CODE:
break;
default:
break;
}
if (buffer) {
gst_buffer_append (enc->packet, buffer);
enc->remaining -= GST_BUFFER_SIZE (buffer);
gst_buffer_unref (buffer);
}
}
else {
if (enc->packet) {
gst_pad_push (enc->srcpad, enc->packet);
enc->packet = NULL;
enc->flags = 0;
enc->remaining = enc->MTU;
}
gst_pad_event_default (enc->sinkpad, GST_EVENT (data));
}
}
static GstElementStateReturn
gst_rfc2250_enc_change_state (GstElement *element)
{
GstRFC2250Enc *rfc2250_enc = GST_RFC2250_ENC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
if (!rfc2250_enc->packetize) {
rfc2250_enc->packetize = gst_mpeg_packetize_new (rfc2250_enc->sinkpad, GST_MPEG_PACKETIZE_VIDEO);
}
break;
case GST_STATE_READY_TO_NULL:
if (rfc2250_enc->packetize) {
gst_mpeg_packetize_destroy (rfc2250_enc->packetize);
rfc2250_enc->packetize = NULL;
}
break;
default:
break;
}
GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static void
gst_rfc2250_enc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstRFC2250Enc *rfc2250_enc;
/* it's not null if we got it, but it might not be ours */
rfc2250_enc = GST_RFC2250_ENC(object);
switch (prop_id) {
case ARG_BIT_RATE:
g_value_set_uint (value, rfc2250_enc->bit_rate);
break;
case ARG_MPEG2:
if (rfc2250_enc->packetize)
g_value_set_boolean (value, GST_MPEG_PACKETIZE_IS_MPEG2 (rfc2250_enc->packetize));
else
g_value_set_boolean (value, FALSE);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_rfc2250_enc_plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* this filter needs the bytestream package */
if (!gst_library_load("gstbytestream")) {
gst_info("rfc2250_enc:: could not load support library: 'gstbytestream'\n");
return FALSE;
}
/* create an elementfactory for the rfc2250_enc element */
factory = gst_elementfactory_new("rfc2250enc",GST_TYPE_RFC2250_ENC,
&rfc2250_enc_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (src_factory));
gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (sink_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}

89
gst/mpegstream/gstrfc2250enc.h Normal file
View file

@ -0,0 +1,89 @@
/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 __RFC2250_ENC_H__
#define __RFC2250_ENC_H__
#include <config.h>
#include <gst/gst.h>
#include <gst/bytestream/bytestream.h>
#include "gstmpegpacketize.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_RFC2250_ENC \
(gst_rfc2250_enc_get_type())
#define GST_RFC2250_ENC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RFC2250_ENC,GstRFC2250Enc))
#define GST_RFC2250_ENC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RFC2250_ENC,GstRFC2250EncClass))
#define GST_IS_RFC2250_ENC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RFC2250_ENC))
#define GST_IS_RFC2250_ENC_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RFC2250_ENC))
#define GST_RFC2250_ENC_IS_MPEG2(parse) (GST_MPEG_PACKETIZE_IS_MPEG2 (GST_RFC2250_ENC (parse)->packetize))
typedef enum {
ENC_HAVE_SEQ = (1 << 0),
ENC_HAVE_GOP = (1 << 1),
ENC_HAVE_PIC = (1 << 2),
ENC_HAVE_DATA = (1 << 3),
} GstEncFlags;
typedef struct _GstRFC2250Enc GstRFC2250Enc;
typedef struct _GstRFC2250EncClass GstRFC2250EncClass;
struct _GstRFC2250Enc {
GstElement element;
GstPad *sinkpad, *srcpad;
GstMPEGPacketize *packetize;
/* pack header values */
guint32 bit_rate;
guint64 next_ts;
GstBuffer *packet;
GstEncFlags flags;
gint MTU;
gint remaining;
};
struct _GstRFC2250EncClass {
GstElementClass parent_class;
};
GType gst_rfc2250_enc_get_type(void);
gboolean gst_rfc2250_enc_plugin_init (GModule *module, GstPlugin *plugin);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __RFC2250_ENC_H__ */