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e7ff86665a
As per the specification, also avoids ending up trying to play a file with plenty of un-initialized values. https://bugzilla.gnome.org/show_bug.cgi?id=774846
259 lines
8.3 KiB
C
259 lines
8.3 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __ASF_DEMUX_H__
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#define __ASF_DEMUX_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/base/gstflowcombiner.h>
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#include "asfheaders.h"
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G_BEGIN_DECLS
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#define GST_TYPE_ASF_DEMUX \
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(gst_asf_demux_get_type())
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#define GST_ASF_DEMUX(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ASF_DEMUX,GstASFDemux))
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#define GST_ASF_DEMUX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ASF_DEMUX,GstASFDemuxClass))
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#define GST_IS_ASF_DEMUX(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ASF_DEMUX))
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#define GST_IS_ASF_DEMUX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ASF_DEMUX))
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GST_DEBUG_CATEGORY_EXTERN (asfdemux_dbg);
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#define GST_CAT_DEFAULT asfdemux_dbg
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typedef struct _GstASFDemux GstASFDemux;
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typedef struct _GstASFDemuxClass GstASFDemuxClass;
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typedef enum _GstASF3DMode GstASF3DMode;
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typedef struct {
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guint32 packet;
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guint16 count;
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} AsfSimpleIndexEntry;
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typedef struct {
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AsfPayloadExtensionID id : 16; /* extension ID; the :16 makes sure the
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* struct gets packed into 4 bytes */
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guint16 len; /* save this so we can skip unknown IDs */
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} AsfPayloadExtension;
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/**
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* 3D Types for Media play
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*/
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enum _GstASF3DMode
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{
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GST_ASF_3D_NONE = 0x00,
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//added, interim format - half
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GST_ASF_3D_SIDE_BY_SIDE_HALF_LR = 0x01,
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GST_ASF_3D_SIDE_BY_SIDE_HALF_RL = 0x02,
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GST_ASF_3D_TOP_AND_BOTTOM_HALF_LR = 0x03,
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GST_ASF_3D_TOP_AND_BOTTOM_HALF_RL = 0x04,
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GST_ASF_3D_DUAL_STREAM = 0x0D, /**< Full format*/
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};
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typedef struct
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{
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gboolean valid; /* TRUE if structure is valid/filled */
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GstClockTime start_time;
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GstClockTime end_time;
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GstClockTime avg_time_per_frame;
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guint32 data_bitrate;
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guint32 buffer_size;
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guint32 intial_buf_fullness;
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guint32 data_bitrate2;
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guint32 buffer_size2;
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guint32 intial_buf_fullness2;
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guint32 max_obj_size;
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guint32 flags;
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guint16 lang_idx;
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/* may be NULL if there are no extensions; otherwise, terminated by
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* an AsfPayloadExtension record with len 0 */
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AsfPayloadExtension *payload_extensions;
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/* missing: stream names */
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} AsfStreamExtProps;
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typedef struct
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{
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AsfStreamType type;
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gboolean active; /* if the stream has been activated (pad added) */
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GstPad *pad;
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guint16 id;
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/* video-only */
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gboolean is_video;
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gboolean fps_known;
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GstCaps *caps;
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GstBuffer *streamheader;
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GstTagList *pending_tags;
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gboolean discont;
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gboolean first_buffer;
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/* Descrambler settings */
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guint8 span;
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guint16 ds_packet_size;
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guint16 ds_chunk_size;
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guint16 ds_data_size;
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/* for new parsing code */
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GArray *payloads; /* pending payloads */
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/* Video stream PAR & interlacing */
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guint8 par_x;
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guint8 par_y;
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gboolean interlaced;
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/* For reverse playback */
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gboolean reverse_kf_ready; /* Found complete KF payload*/
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GArray *payloads_rev; /* Temp queue for storing multiple payloads of packet*/
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gint kf_pos; /* KF position in payload queue. Payloads from this pos will be pushed */
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/* extended stream properties (optional) */
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AsfStreamExtProps ext_props;
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gboolean inspect_payload;
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} AsfStream;
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typedef enum {
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GST_ASF_DEMUX_STATE_HEADER,
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GST_ASF_DEMUX_STATE_DATA,
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GST_ASF_DEMUX_STATE_INDEX
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} GstASFDemuxState;
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#define GST_ASF_DEMUX_IS_REVERSE_PLAYBACK(seg) (seg.rate < 0.0? TRUE:FALSE)
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#define GST_ASF_DEMUX_NUM_VIDEO_PADS 16
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#define GST_ASF_DEMUX_NUM_AUDIO_PADS 32
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#define GST_ASF_DEMUX_NUM_STREAMS 32
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#define GST_ASF_DEMUX_NUM_STREAM_IDS 127
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struct _GstASFDemux {
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GstElement element;
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GstPad *sinkpad;
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gboolean have_group_id;
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guint group_id;
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GstAdapter *adapter;
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GstTagList *taglist;
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GstASFDemuxState state;
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/* byte offset where the asf starts, which might not be zero on chained
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* asfs, index_offset and data_offset already are 'offseted' by base_offset */
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guint64 base_offset;
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guint64 index_offset; /* byte offset where index might be, or 0 */
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guint64 data_offset; /* byte offset where packets start */
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guint64 data_size; /* total size of packet data in bytes, or 0 */
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guint64 num_packets; /* total number of data packets, or 0 */
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gint64 packet; /* current packet */
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guint speed_packets; /* Known number of packets to get in one go*/
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gchar **languages;
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guint num_languages;
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GstCaps *metadata; /* metadata, for delayed parsing; one
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* structure ('stream-N') per stream */
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GstStructure *global_metadata; /* metadata which isn't specific to one stream */
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GSList *ext_stream_props; /* for delayed processing (buffers) */
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GSList *mut_ex_streams; /* mutually exclusive streams */
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guint32 num_audio_streams;
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guint32 num_video_streams;
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guint32 num_streams;
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AsfStream stream[GST_ASF_DEMUX_NUM_STREAMS];
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gboolean activated_streams;
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GstFlowCombiner *flowcombiner;
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/* for chained asf handling, we need to hold the old asf streams until
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* we detect the new ones */
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AsfStream old_stream[GST_ASF_DEMUX_NUM_STREAMS];
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gboolean old_num_streams;
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GstClockTime first_ts; /* smallest timestamp found */
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guint32 packet_size;
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guint64 play_time;
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guint64 preroll;
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gboolean seekable;
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gboolean broadcast;
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GstSegment segment; /* configured play segment */
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gboolean keyunit_sync;
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gboolean accurate;
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gboolean need_newsegment; /* do we need to send a new-segment event? */
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guint32 segment_seqnum; /* if the new segment must have this seqnum */
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GstClockTime segment_ts; /* streaming; timestamp for segment start */
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GstSegment in_segment; /* streaming; upstream segment info */
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GstClockTime in_gap; /* streaming; upstream initial segment gap for interpolation */
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gboolean segment_running; /* if we've started the current segment */
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gboolean streaming; /* TRUE if we are operating chain-based */
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GstClockTime latency;
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/* for debugging only */
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gchar *objpath;
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/* simple index, if available */
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GstClockTime sidx_interval; /* interval between entries in ns */
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guint sidx_num_entries; /* number of index entries */
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AsfSimpleIndexEntry *sidx_entries; /* packet number for each entry */
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GSList *other_streams; /* remember streams that are in header but have unknown type */
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/* For reverse playback */
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gboolean seek_to_cur_pos; /* Search packets till we reach 'seek' time */
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gboolean multiple_payloads; /* Whether packet has multiple payloads */
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/* parsing 3D */
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GstASF3DMode asf_3D_mode;
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gboolean saw_file_header;
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};
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struct _GstASFDemuxClass {
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GstElementClass parent_class;
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};
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GType gst_asf_demux_get_type (void);
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AsfStream * gst_asf_demux_get_stream (GstASFDemux * demux, guint16 id);
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gboolean gst_asf_demux_is_unknown_stream(GstASFDemux *demux, guint stream_num);
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G_END_DECLS
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#endif /* __ASF_DEMUX_H__ */
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