gstreamer/gst/mpegstream/gstmpegdemux.h

190 lines
6.1 KiB
C
Raw Normal View History

/* 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 __MPEG_DEMUX_H__
#define __MPEG_DEMUX_H__
#include <gst/gst.h>
#include "gstmpegparse.h"
G_BEGIN_DECLS
#define GST_TYPE_MPEG_DEMUX \
(gst_mpeg_demux_get_type())
#define GST_MPEG_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MPEG_DEMUX,GstMPEGDemux))
#define GST_MPEG_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MPEG_DEMUX,GstMPEGDemuxClass))
#define GST_IS_MPEG_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MPEG_DEMUX))
#define GST_IS_MPEG_DEMUX_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MPEG_DEMUX))
/* Supported kinds of streams. */
enum {
GST_MPEG_DEMUX_STREAM_VIDEO = 1,
GST_MPEG_DEMUX_STREAM_AUDIO,
GST_MPEG_DEMUX_STREAM_PRIVATE,
GST_MPEG_DEMUX_STREAM_LAST
};
/* Supported number of streams. */
#define GST_MPEG_DEMUX_NUM_VIDEO_STREAMS 16
#define GST_MPEG_DEMUX_NUM_AUDIO_STREAMS 32
#define GST_MPEG_DEMUX_NUM_PRIVATE_STREAMS 2
/* How to make stream type values. */
#define GST_MPEG_DEMUX_STREAM_TYPE(kind, serial) \
(((kind) << 16) + (serial))
/* How to retrieve the stream kind back from a type. */
#define GST_MPEG_DEMUX_STREAM_KIND(type) ((type) >> 16)
/* The recognized video types. */
enum {
GST_MPEG_DEMUX_VIDEO_UNKNOWN =
GST_MPEG_DEMUX_STREAM_TYPE (GST_MPEG_DEMUX_STREAM_VIDEO, 1),
GST_MPEG_DEMUX_VIDEO_MPEG,
GST_MPEG_DEMUX_VIDEO_LAST
};
/* The recognized audio types. */
enum {
GST_MPEG_DEMUX_AUDIO_UNKNOWN =
GST_MPEG_DEMUX_STREAM_TYPE (GST_MPEG_DEMUX_STREAM_AUDIO, 1),
GST_MPEG_DEMUX_AUDIO_MPEG,
GST_MPEG_DEMUX_AUDIO_LAST
};
/* The recognized private stream types. */
enum {
GST_MPEG_DEMUX_PRIVATE_UNKNOWN =
GST_MPEG_DEMUX_STREAM_TYPE (GST_MPEG_DEMUX_STREAM_PRIVATE, 1),
GST_MPEG_DEMUX_PRIVATE_LAST
};
typedef struct _GstMPEGStream GstMPEGStream;
typedef struct _GstMPEGVideoStream GstMPEGVideoStream;
typedef struct _GstMPEGDemux GstMPEGDemux;
typedef struct _GstMPEGDemuxClass GstMPEGDemuxClass;
/* Information associated to a single MPEG stream. */
struct _GstMPEGStream {
gint type;
gint number;
GstPad *pad;
gint index_id;
gint size_bound;
};
/* Extended structure to hold additional information for video
streams. */
struct _GstMPEGVideoStream {
GstMPEGStream parent;
gint mpeg_version;
};
struct _GstMPEGDemux {
GstMPEGParse parent;
/* previous partial chunk and bytes remaining in it */
gboolean in_flush;
/* program stream header values */
guint16 header_length;
guint32 rate_bound;
guint8 audio_bound;
gboolean fixed;
gboolean constrained;
gboolean audio_lock;
gboolean video_lock;
guint8 video_bound;
gboolean packet_rate_restriction;
gint64 total_size_bound;
GstIndex *index;
/* stream output */
GstMPEGStream *video_stream[GST_MPEG_DEMUX_NUM_VIDEO_STREAMS];
GstMPEGStream *audio_stream[GST_MPEG_DEMUX_NUM_AUDIO_STREAMS];
GstMPEGStream *private_stream[GST_MPEG_DEMUX_NUM_PRIVATE_STREAMS];
GstClockTimeDiff adjust; /* Added to all PTS timestamps. This element
keeps always this value in 0, but it is
there for the benefit of subclasses. */
};
struct _GstMPEGDemuxClass {
GstMPEGParseClass parent_class;
GstPadTemplate *video_template;
GstPadTemplate *audio_template;
GstPadTemplate *private_template;
GstPad * (*new_output_pad) (GstMPEGDemux *mpeg_demux,
const gchar *name,
GstPadTemplate *temp);
void (*init_stream) (GstMPEGDemux *mpeg_demux,
gint type,
GstMPEGStream *str,
gint number,
const gchar *name,
GstPadTemplate *temp);
GstMPEGStream *
(*get_video_stream) (GstMPEGDemux *mpeg_demux,
guint8 stream_nr,
gint type,
const gpointer info);
GstMPEGStream *
(*get_audio_stream) (GstMPEGDemux *mpeg_demux,
guint8 stream_nr,
gint type,
const gpointer info);
GstMPEGStream *
(*get_private_stream) (GstMPEGDemux *mpeg_demux,
guint8 stream_nr,
gint type,
const gpointer info);
void (*send_subbuffer) (GstMPEGDemux *mpeg_demux,
GstMPEGStream *outstream,
GstBuffer *buffer,
GstClockTime timestamp,
guint offset,
guint size);
void (*process_private) (GstMPEGDemux *mpeg_demux,
GstBuffer *buffer,
guint stream_nr,
GstClockTime timestamp,
guint headerlen, guint datalen);
};
GType gst_mpeg_demux_get_type (void);
gboolean gst_mpeg_demux_plugin_init (GstPlugin *plugin);
G_END_DECLS
#endif /* __MPEG_DEMUX_H__ */