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-rw-r--r--gst-libs/ext/mplex/inputstrm.hh278
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diff --git a/gst-libs/ext/mplex/inputstrm.hh b/gst-libs/ext/mplex/inputstrm.hh
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--- a/gst-libs/ext/mplex/inputstrm.hh
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-
-/*
- * inptstrm.hh: Input stream classes for MPEG multiplexing
- * TODO: Split into the base classes and the different types of
- * actual input stream.
- *
- * Copyright (C) 2001 Andrew Stevens <andrew.stevens@philips.com>
- *
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#ifndef __INPUTSTRM_H__
-#define __INPUTSTRM_H__
-
-#include <config.h>
-#include <stdio.h>
-#include <vector>
-#include <sys/stat.h>
-
-#include "mjpeg_types.h"
-#include "mpegconsts.h"
-#include "format_codes.h"
-#include "mjpeg_logging.h"
-
-#include "mplexconsts.hh"
-#include "bits.hh"
-#include "aunit.hh"
-#include "vector.hh"
-#include "buffer.hh"
-
-
-class InputStream
-{
-public:
- InputStream (IBitStream & istream):bs (istream),
- eoscan (false), stream_length (0), last_buffered_AU (0), decoding_order (0), old_frames (0)
- {
- }
-
- void SetBufSize (unsigned int buf_size)
- {
- bs.SetBufSize (buf_size);
- }
-
-protected:
- IBitStream & bs;
- bool eoscan;
- bitcount_t stream_length;
- off_t file_length;
-
- unsigned int last_buffered_AU; // decode seq num of last buffered frame + 1
- bitcount_t AU_start;
- uint32_t syncword;
- bitcount_t prev_offset;
- unsigned int decoding_order;
- unsigned int old_frames;
-
-};
-
-//
-// Abstract forward reference...
-//
-
-class OutputStream;
-
-
-class MuxStream
-{
-public:
- MuxStream ();
-
- void Init (const int strm_id,
- const unsigned int _buf_scale,
- const unsigned int buf_size,
- const unsigned int _zero_stuffing, const bool bufs_in_first, const bool always_bufs);
-
- unsigned int BufferSizeCode ();
- inline unsigned int BufferSize ()
- {
- return buffer_size;
- }
- inline unsigned int BufferScale ()
- {
- return buffer_scale;
- }
-
-
- inline void SetMaxPacketData (unsigned int max)
- {
- max_packet_data = max;
- }
- inline void SetMinPacketData (unsigned int min)
- {
- min_packet_data = min;
- }
- inline unsigned int MaxPacketData ()
- {
- return max_packet_data;
- }
- inline unsigned int MinPacketData ()
- {
- return min_packet_data;
- }
- inline bool NewAUNextSector ()
- {
- return new_au_next_sec;
- }
-
- //
- // Read the next packet payload (sub-stream headers plus
- // parsed and spliced stream data) for a packet with the
- // specified payload capacity. Update the AU info.
- //
-
- virtual unsigned int ReadPacketPayload (uint8_t * dst, unsigned int to_read) = 0;
-
- //
- // Return the size of the substream headers...
- //
- virtual unsigned int StreamHeaderSize ()
- {
- return 0;
- }
-
-public: // TODO should go protected once encapsulation complete
- int stream_id;
- unsigned int buffer_scale;
- unsigned int buffer_size;
- BufferModel bufmodel;
- unsigned int max_packet_data;
- unsigned int min_packet_data;
- unsigned int zero_stuffing;
- unsigned int nsec;
- bool buffers_in_header;
- bool always_buffers_in_header;
- bool new_au_next_sec;
- bool init;
-};
-
-class DummyMuxStream:public MuxStream
-{
-public:
- DummyMuxStream (const int strm_id, const unsigned int buf_scale, unsigned int buf_size)
- {
- stream_id = strm_id;
- buffer_scale = buf_scale;
- buffer_size = buf_size;
- }
-
- unsigned int ReadPacketPayload (uint8_t * dst, unsigned int to_read)
- {
- abort ();
- return 0;
- }
-};
-
-
-class ElementaryStream:public InputStream, public MuxStream
-{
-public:
- enum stream_kind
- { audio, video, dummy };
- ElementaryStream (IBitStream & ibs, OutputStream & into, stream_kind kind);
- virtual void Close () = 0;
-
- bool NextAU ();
- Aunit *Lookahead ();
- unsigned int BytesToMuxAUEnd (unsigned int sector_transport_size);
- bool MuxCompleted ();
- virtual bool MuxPossible (clockticks currentSCR);
- void DemuxedTo (clockticks SCR);
- void SetTSOffset (clockticks baseTS);
- void AllDemuxed ();
- inline stream_kind Kind ()
- {
- return kind;
- }
- inline int BufferMin ()
- {
- return buffer_min;
- }
- inline int BufferMax ()
- {
- return buffer_max;
- }
- inline clockticks RequiredDTS ()
- {
- return au->DTS + timestamp_delay;
- };
- inline clockticks RequiredPTS ()
- {
- return au->PTS + timestamp_delay;
- };
- inline clockticks NextRequiredDTS ()
- {
- Aunit *next = Lookahead ();
-
- if (next != 0)
- return next->DTS + timestamp_delay;
- else
- return 0;
- };
- inline clockticks NextRequiredPTS ()
- {
- Aunit *next = Lookahead ();
-
- if (next != 0)
- return next->PTS + timestamp_delay;
- else
- return 0;
- };
-
- void UpdateBufferMinMax ();
-
- void SetSyncOffset (clockticks timestamp_delay);
-
-
- inline bool BuffersInHeader ()
- {
- return buffers_in_header;
- }
- virtual unsigned int NominalBitRate () = 0;
- virtual bool RunOutComplete () = 0;
- virtual void OutputSector () = 0;
-
- virtual unsigned int ReadPacketPayload (uint8_t * dst, unsigned int to_read);
-
-
-protected:
- virtual void FillAUbuffer (unsigned int frames_to_buffer) = 0;
- virtual void InitAUbuffer () = 0;
- virtual bool AUBufferNeedsRefill () = 0;
- AUStream aunits;
- void Muxed (unsigned int bytes_muxed);
-
-public: // TODO should go protected once encapsulation complete
- // N.b. currently length=0 is used to indicate an ended
- // stream.
- // au itself should simply disappear
- Aunit * au;
- clockticks timestamp_delay;
-
-protected:
- unsigned int au_unsent;
- Aunit *next ();
-
- OutputStream & muxinto;
- stream_kind kind;
- int buffer_min;
- int buffer_max;
- int FRAME_CHUNK;
-
-};
-
-
-
-#endif // __INPUTSTRM_H__
-
-
-/*
- * Local variables:
- * c-file-style: "stroustrup"
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */