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Added a mpeg2dec plugin based on current mpeg2dec CVS that does proper I-frame seeking and sinkpad conversion

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Original commit message from CVS:
Added a mpeg2dec plugin based on current mpeg2dec CVS that does
proper I-frame seeking and sinkpad conversion
This commit is contained in:
Wim Taymans 2002-06-20 21:23:23 +00:00
parent 88088dc895
commit ad2e7cd89c
2 changed files with 793 additions and 0 deletions
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705
ext/mpeg2dec/gstmpeg2deccvs.c Normal file
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@ -0,0 +1,705 @@
/* GStreamer
* 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.
*/
#include <string.h>
#include <inttypes.h>
#include <mpeg2dec/mm_accel.h>
#include <mpeg2dec/video_out.h>
#include "gstmpeg2dec.h"
/* elementfactory information */
static GstElementDetails gst_mpeg2dec_details = {
"mpeg1 and mpeg2 video decoder",
"Codec/Video/Decoder",
"Uses libmpeg2 to decode MPEG video streams",
VERSION,
"Wim Taymans <wim.taymans@chello.be>, "
"(C) 2002",
};
/* Mpeg2dec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_FRAME_RATE,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (src_template_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"mpeg2dec_src",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')),
"width", GST_PROPS_INT_RANGE (16, 4096),
"height", GST_PROPS_INT_RANGE (16, 4096)
)
);
GST_PAD_TEMPLATE_FACTORY (sink_template_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"mpeg2dec_sink",
"video/mpeg",
"mpegversion", GST_PROPS_INT_RANGE (1, 2),
"systemstream", GST_PROPS_BOOLEAN (FALSE)
)
);
static void gst_mpeg2dec_class_init (GstMpeg2decClass *klass);
static void gst_mpeg2dec_init (GstMpeg2dec *mpeg2dec);
static void gst_mpeg2dec_dispose (GObject *object);
static void gst_mpeg2dec_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_mpeg2dec_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static gboolean gst_mpeg2dec_src_event (GstPad *pad, GstEvent *event);
static gboolean gst_mpeg2dec_src_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value);
static gboolean gst_mpeg2dec_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static gboolean gst_mpeg2dec_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static GstElementStateReturn
gst_mpeg2dec_change_state (GstElement *element);
static void gst_mpeg2dec_chain (GstPad *pad, GstBuffer *buffer);
static GstElementClass *parent_class = NULL;
/*static guint gst_mpeg2dec_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_mpeg2dec_get_type (void)
{
static GType mpeg2dec_type = 0;
if (!mpeg2dec_type) {
static const GTypeInfo mpeg2dec_info = {
sizeof(GstMpeg2decClass),
NULL,
NULL,
(GClassInitFunc)gst_mpeg2dec_class_init,
NULL,
NULL,
sizeof(GstMpeg2dec),
0,
(GInstanceInitFunc)gst_mpeg2dec_init,
};
mpeg2dec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMpeg2dec", &mpeg2dec_info, 0);
}
return mpeg2dec_type;
}
static void
gst_mpeg2dec_class_init(GstMpeg2decClass *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_FRAME_RATE,
g_param_spec_float ("frame_rate","frame_rate","frame_rate",
0.0, 1000.0, 0.0, G_PARAM_READABLE));
gobject_class->set_property = gst_mpeg2dec_set_property;
gobject_class->get_property = gst_mpeg2dec_get_property;
gobject_class->dispose = gst_mpeg2dec_dispose;
gstelement_class->change_state = gst_mpeg2dec_change_state;
}
static void
gst_mpeg2dec_init (GstMpeg2dec *mpeg2dec)
{
/* create the sink and src pads */
mpeg2dec->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (sink_template_factory), "sink");
gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->sinkpad);
gst_pad_set_chain_function (mpeg2dec->sinkpad, gst_mpeg2dec_chain);
gst_pad_set_convert_function (mpeg2dec->sinkpad, gst_mpeg2dec_convert_sink);
mpeg2dec->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (src_template_factory), "src");
gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->srcpad);
gst_pad_set_event_function (mpeg2dec->srcpad, GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_event));
gst_pad_set_query_function (mpeg2dec->srcpad, GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_query));
gst_pad_set_convert_function (mpeg2dec->srcpad, gst_mpeg2dec_convert_src);
/* initialize the mpeg2dec decoder state */
mpeg2dec->decoder = mpeg2_init (mm_accel());
GST_FLAG_SET (GST_ELEMENT (mpeg2dec), GST_ELEMENT_EVENT_AWARE);
}
static void
gst_mpeg2dec_dispose (GObject *object)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (object);
mpeg2_close (mpeg2dec->decoder);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gst_mpeg2dec_alloc_buffer (GstMpeg2dec *mpeg2dec, mpeg2_info_t *info)
{
GstBuffer *outbuf = NULL;
gint size = mpeg2dec->width * mpeg2dec->height;
guint8 *buf[3], *out;
if (mpeg2dec->peerpool) {
outbuf = gst_buffer_new_from_pool (mpeg2dec->peerpool, 0, 0);
}
if (!outbuf) {
outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (outbuf) = (size * 3) / 2;
GST_BUFFER_DATA (outbuf) = g_malloc0 ((size * 3)/2);
}
out = GST_BUFFER_DATA (outbuf);
buf[0] = out;
buf[1] = buf[0] + size;
buf[2] = buf[1] + size/4;
gst_buffer_ref (outbuf);
mpeg2_set_buf (mpeg2dec->decoder, buf, outbuf);
if (info->current_picture && (info->current_picture->flags & PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_I)
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_KEY_UNIT);
else
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_KEY_UNIT);
return TRUE;
}
static void
gst_mpeg2dec_chain (GstPad *pad, GstBuffer *buf)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
guint32 size;
guint8 *data, *end;
gint64 pts;
mpeg2_info_t *info;
gint state;
gboolean done = FALSE;
GST_DEBUG (0, "MPEG2DEC: chain called");
if (GST_IS_EVENT (buf)) {
GstEvent *event = GST_EVENT (buf);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_DISCONTINUOUS:
{
//gint64 value = GST_EVENT_DISCONT_OFFSET (event, 0).value;
//mpeg2dec->decoder->is_sequence_needed = 1;
GST_DEBUG (GST_CAT_EVENT, "mpeg2dec: discont\n");
mpeg2dec->first = TRUE;
mpeg2dec->frames_per_PTS = 0;
mpeg2dec->last_PTS = -1;
mpeg2dec->adjust = 0;
mpeg2dec->next_time = 0;
mpeg2dec->discont_pending = TRUE;
gst_pad_event_default (pad, event);
return;
}
case GST_EVENT_EOS:
if (!mpeg2dec->closed) {
mpeg2_close (mpeg2dec->decoder);
mpeg2dec->closed = TRUE;
}
default:
gst_pad_event_default (pad, event);
return;
}
}
size = GST_BUFFER_SIZE (buf);
data = GST_BUFFER_DATA (buf);
pts = GST_BUFFER_TIMESTAMP (buf);
GST_DEBUG (GST_CAT_CLOCK, "mpeg2dec: pts %llu\n", pts);
info = mpeg2_info (mpeg2dec->decoder);
end = data + size;
while (!done) {
state = mpeg2_buffer (mpeg2dec->decoder, &data, end);
switch (state) {
case STATE_SEQUENCE:
{
mpeg2dec->width = info->sequence->width;
mpeg2dec->height = info->sequence->height;
mpeg2dec->total_frames = 0;
gst_pad_try_set_caps (mpeg2dec->srcpad,
GST_CAPS_NEW (
"mpeg2dec_caps",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')),
"width", GST_PROPS_INT (mpeg2dec->width),
"height", GST_PROPS_INT (mpeg2dec->height)
));
gst_mpeg2dec_alloc_buffer (mpeg2dec, info);
break;
}
case STATE_GOP:
break;
case STATE_PICTURE:
gst_mpeg2dec_alloc_buffer (mpeg2dec, info);
if (info->current_picture && (info->current_picture->flags & PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_I &&
mpeg2dec->discont_pending) {
mpeg2dec->discont_pending = FALSE;
mpeg2dec->first = TRUE;
if (pts != -1 && mpeg2dec->last_PTS == -1) {
mpeg2dec->last_PTS = pts;
mpeg2dec->next_time = pts;
}
}
break;
case STATE_SLICE_1ST:
break;
case STATE_PICTURE_2ND:
break;
case STATE_SLICE:
case STATE_END:
{
GstBuffer *outbuf = NULL;
if (info->display_fbuf) {
outbuf = (GstBuffer *) info->display_fbuf->id;
GST_BUFFER_TIMESTAMP (outbuf) = mpeg2dec->next_time;
mpeg2dec->next_time += info->sequence->frame_period * GST_USECOND / 27;
if (mpeg2dec->discont_pending ||
(mpeg2dec->first && !GST_BUFFER_FLAG_IS_SET (outbuf, GST_BUFFER_KEY_UNIT))) {
gst_buffer_unref (outbuf);
}
else {
mpeg2dec->first = FALSE;
gst_pad_push (mpeg2dec->srcpad, outbuf);
}
}
if (info->discard_fbuf) {
gst_buffer_unref ((GstBuffer *)info->discard_fbuf->id);
}
break;
}
/* need more data */
case -1:
done = TRUE;
break;
/* error */
default:
case STATE_INVALID:
gst_element_error (GST_ELEMENT (mpeg2dec), "fatal error");
done = TRUE;
break;
}
}
gst_buffer_unref(buf);
}
static gboolean
gst_mpeg2dec_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
mpeg2_info_t *info;
mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
info = mpeg2_info (mpeg2dec->decoder);
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
if (info->sequence && info->sequence->byte_rate) {
*dest_value = GST_SECOND * src_value / info->sequence->byte_rate;
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_BYTES;
case GST_FORMAT_BYTES:
if (info->sequence && info->sequence->byte_rate) {
*dest_value = src_value * info->sequence->byte_rate / GST_SECOND;
break;
}
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_mpeg2dec_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
mpeg2_info_t *info;
guint64 scale = 1;
mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
info = mpeg2_info (mpeg2dec->decoder);
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_BYTES;
case GST_FORMAT_BYTES:
scale = 6 * (mpeg2dec->width * mpeg2dec->height >> 2);
case GST_FORMAT_UNITS:
if (info->sequence && info->sequence->frame_period) {
*dest_value = src_value * scale * 27 / (info->sequence->frame_period * GST_USECOND);
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_UNITS:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
*dest_value = src_value * info->sequence->frame_period * GST_USECOND / 27;
break;
case GST_FORMAT_BYTES:
*dest_value = src_value * 6 * ((mpeg2dec->width * mpeg2dec->height) >> 2);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_mpeg2dec_src_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
#define MAX_SEEK_FORMATS 1 /* we can only do time seeking for now */
gint i;
mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
switch (type) {
case GST_PAD_QUERY_TOTAL:
{
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fallthrough */
case GST_FORMAT_TIME:
case GST_FORMAT_BYTES:
case GST_FORMAT_UNITS:
{
res = FALSE;
for (i = 0; i < MAX_SEEK_FORMATS && !res; i++) {
GstFormat peer_format;
gint64 peer_value;
peer_format = formats[i];
/* do the probe */
if (gst_pad_query (GST_PAD_PEER (mpeg2dec->sinkpad), GST_PAD_QUERY_TOTAL,
&peer_format, &peer_value))
{
GstFormat conv_format;
/* convert to TIME */
conv_format = GST_FORMAT_TIME;
res = gst_pad_convert (mpeg2dec->sinkpad,
peer_format, peer_value,
&conv_format, value);
/* and to final format */
res &= gst_pad_convert (pad,
GST_FORMAT_TIME, *value,
format, value);
}
}
break;
}
default:
res = FALSE;
break;
}
break;
}
case GST_PAD_QUERY_POSITION:
{
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fallthrough */
default:
res = gst_pad_convert (pad,
GST_FORMAT_TIME, mpeg2dec->next_time,
format, value);
break;
}
break;
}
default:
res = FALSE;
break;
}
return res;
}
static gboolean
gst_mpeg2dec_src_event (GstPad *pad, GstEvent *event)
{
gboolean res = TRUE;
GstMpeg2dec *mpeg2dec;
static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
#define MAX_SEEK_FORMATS 1 /* we can only do time seeking for now */
gint i;
mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
/* the all-formats seek logic */
case GST_EVENT_SEEK:
{
gint64 src_offset;
gboolean flush;
GstFormat format;
format = GST_FORMAT_TIME;
/* first bring the src_format to TIME */
if (!gst_pad_convert (pad,
GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event),
&format, &src_offset))
{
/* didn't work, probably unsupported seek format then */
res = FALSE;
break;
}
/* shave off the flush flag, we'll need it later */
flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
/* assume the worst */
res = FALSE;
/* while we did not exhaust our seek formats without result */
for (i = 0; i < MAX_SEEK_FORMATS && !res; i++) {
gint64 desired_offset;
format = formats[i];
/* try to convert requested format to one we can seek with on the sinkpad */
if (gst_pad_convert (mpeg2dec->sinkpad, GST_FORMAT_TIME, src_offset, &format, &desired_offset))
{
GstEvent *seek_event;
/* conversion succeeded, create the seek */
seek_event = gst_event_new_seek (formats[i] | GST_SEEK_METHOD_SET | flush, desired_offset);
/* do the seekk */
if (gst_pad_send_event (GST_PAD_PEER (mpeg2dec->sinkpad), seek_event)) {
/* seek worked, we're done, loop will exit */
res = TRUE;
}
gst_event_free (seek_event);
}
/* at this point, either the seek worked or res == FALSE */
}
break;
}
default:
res = FALSE;
break;
}
return res;
}
static GstElementStateReturn
gst_mpeg2dec_change_state (GstElement *element)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
{
mpeg2dec->next_time = 0;
mpeg2dec->peerpool = NULL;
mpeg2dec->closed = FALSE;
/* reset the initial video state */
mpeg2dec->format = -1;
mpeg2dec->width = -1;
mpeg2dec->height = -1;
mpeg2dec->first = TRUE;
mpeg2dec->frames_per_PTS = 0;
mpeg2dec->last_PTS = -1;
mpeg2dec->adjust = 0;
mpeg2dec->discont_pending = TRUE;
break;
}
case GST_STATE_PAUSED_TO_PLAYING:
/* try to get a bufferpool */
mpeg2dec->peerpool = gst_pad_get_bufferpool (mpeg2dec->srcpad);
if (mpeg2dec->peerpool)
GST_INFO (GST_CAT_PLUGIN_INFO, "got pool %p", mpeg2dec->peerpool);
break;
case GST_STATE_PLAYING_TO_PAUSED:
/* need to clear things we get from other plugins, since we could be reconnected */
if (mpeg2dec->peerpool) {
mpeg2dec->peerpool = NULL;
}
break;
case GST_STATE_PAUSED_TO_READY:
/* if we are not closed by an EOS event do so now, this cen send a few frames but
* we are prepared to not really send them (see above) */
if (!mpeg2dec->closed) {
/*mpeg2_close (mpeg2dec->decoder); */
mpeg2dec->closed = TRUE;
}
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static void
gst_mpeg2dec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstMpeg2dec *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MPEG2DEC (object));
src = GST_MPEG2DEC (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_mpeg2dec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstMpeg2dec *mpeg2dec;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MPEG2DEC (object));
mpeg2dec = GST_MPEG2DEC (object);
switch (prop_id) {
case ARG_FRAME_RATE:
break;
default:
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the mpeg2dec element */
factory = gst_element_factory_new("mpeg2dec",GST_TYPE_MPEG2DEC,
&gst_mpeg2dec_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_PRIMARY);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_template_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mpeg2dec",
plugin_init
};

88
ext/mpeg2dec/gstmpeg2deccvs.h Normal file
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/* GStreamer
* 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 __GST_MPEG2DEC_H__
#define __GST_MPEG2DEC_H__
#include <config.h>
#include <gst/gst.h>
#include <mpeg2dec/mpeg2.h>
#include <mpeg2dec/mm_accel.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_MPEG2DEC \
(gst_mpeg2dec_get_type())
#define GST_MPEG2DEC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MPEG2DEC,GstMpeg2dec))
#define GST_MPEG2DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MPEG2DEC,GstMpeg2dec))
#define GST_IS_MPEG2DEC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MPEG2DEC))
#define GST_IS_MPEG2DEC_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MPEG2DEC))
typedef struct _GstMpeg2dec GstMpeg2dec;
typedef struct _GstMpeg2decClass GstMpeg2decClass;
struct _GstMpeg2dec {
GstElement element;
/* pads */
GstPad *sinkpad,*srcpad;
GstBufferPool *peerpool;
mpeg2dec_t *decoder;
guint32 accel;
gboolean closed;
/* the timestamp of the next frame */
gboolean first;
gboolean discont_pending;
gint64 next_time;
gint64 last_PTS;
gint frames_per_PTS;
gint adjust;
/* video state */
gint format;
gint width;
gint height;
gint frame_rate_code;
gint64 total_frames;
};
struct _GstMpeg2decClass {
GstElementClass parent_class;
};
GType gst_mpeg2dec_get_type(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_MPEG2DEC_H__ */