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author | David Schleef <ds@schleef.org> | 2003-07-27 05:24:15 +0000 |
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committer | David Schleef <ds@schleef.org> | 2003-07-27 05:24:15 +0000 |
commit | d1f62e8a4f976e11634d2f9187821e8686cec76d (patch) | |
tree | 7aeb45681425dc71469510056d67f4aa20d3574b /ext/mplex/videostrm_out.cc | |
parent | a10432d76cb431d03e27b97d790d2ba7ae34f4b8 (diff) | |
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Moved to gst-libs/ext/mplex
Original commit message from CVS:
Moved to gst-libs/ext/mplex
Diffstat (limited to 'ext/mplex/videostrm_out.cc')
-rw-r--r-- | ext/mplex/videostrm_out.cc | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/ext/mplex/videostrm_out.cc b/ext/mplex/videostrm_out.cc deleted file mode 100644 index a70bd078..00000000 --- a/ext/mplex/videostrm_out.cc +++ /dev/null @@ -1,276 +0,0 @@ - -/* - * inptstrm.c: Members of input stream classes related to muxing out into - * the output 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. - */ - - -#include <config.h> -#include <assert.h> -#include "fastintfns.h" -#include "videostrm.hh" -#include "outputstream.hh" - - -VideoStream::VideoStream (IBitStream & ibs, OutputStream & into): -ElementaryStream (ibs, into, ElementaryStream::video), -num_sequence (0), -num_seq_end (0), -num_pictures (0), -num_groups (0), dtspts_for_all_au (into.dtspts_for_all_vau), gop_control_packet (false) -{ - prev_offset = 0; - decoding_order = 0; - fields_presented = 0; - group_order = 0; - group_start_pic = 0; - group_start_field = 0; - temporal_reference = 0; - pulldown_32 = 0; - temporal_reference = -1; // Needed to recognise 2nd field of 1st - // frame in a field pic sequence - last_buffered_AU = 0; - max_bits_persec = 0; - AU_hdr = SEQUENCE_HEADER; /* GOP or SEQ Header starting AU? */ - for (int i = 0; i < 4; ++i) - num_frames[i] = avg_frames[i] = 0; - FRAME_CHUNK = 6; - - this->opt_mpeg = into.opt_mpeg; - this->opt_multifile_segment = into.opt_multifile_segment; -} - -bool -VideoStream::Probe (IBitStream & bs) -{ - return bs.getbits (32) == 0x1b3; -} - -void -VideoStream::InitAUbuffer () -{ - unsigned int i; - - for (i = 0; i < aunits.BUF_SIZE; ++i) - aunits.init (new VAunit); -} - - -/********************************* - * Signals when video stream has completed mux run-out specified - * in associated mux stream. Run-out is always to complete GOP's. - *********************************/ - -bool -VideoStream::RunOutComplete () -{ - - return (au_unsent == 0 || - (muxinto.running_out && au->type == IFRAME && RequiredPTS () >= muxinto.runout_PTS)); -} - -/********************************* - * Signals if it is permissible/possible to Mux out a sector from the Stream. - * The universal constraints that muxing should not be complete and that - * that the reciever buffer should have sufficient it also insists that - * the muxed data won't hang around in the receiver buffer for more than - * one second. This is mainly for the benefit of (S)VCD and DVD applications - * where long delays mess up random access. - *******************************/ - - -bool -VideoStream::MuxPossible (clockticks currentSCR) -{ - - return (ElementaryStream::MuxPossible (currentSCR) && - RequiredDTS () < currentSCR + max_STD_buffer_delay); -} - -/********************************* - * Work out the timestamps to be set in the header of sectors starting - * new AU's. - *********************************/ - -uint8_t -VideoStream::NewAUTimestamps (int AUtype) -{ - uint8_t timestamps; - - if (AUtype == BFRAME) - timestamps = TIMESTAMPBITS_PTS; - else - timestamps = TIMESTAMPBITS_PTS_DTS; - - if (muxinto.timestamp_iframe_only && AUtype != IFRAME) - timestamps = TIMESTAMPBITS_NO; - return timestamps; -} - -/********************************* - * Work out the buffer records to be set in the header of sectors - * starting new AU's. - *********************************/ - -bool -VideoStream::NewAUBuffers (int AUtype) -{ - return buffers_in_header & !(muxinto.video_buffers_iframe_only && AUtype != IFRAME); -} - -/****************************************************************** - Output_Video - generiert Pack/Sys_Header/Packet Informationen aus dem - Video Stream und speichert den so erhaltenen Sektor ab. - - generates Pack/Sys_Header/Packet information from the - video stream and writes out the new sector -******************************************************************/ - -void -VideoStream::OutputSector () -{ - - unsigned int max_packet_payload; - unsigned int actual_payload; - unsigned int old_au_then_new_payload; - clockticks DTS, PTS; - int autype; - - max_packet_payload = 0; /* 0 = Fill sector */ - /* - We're now in the last AU of a segment. - So we don't want to go beyond it's end when filling - sectors. Hence we limit packet payload size to (remaining) AU length. - The same applies when we wish to ensure sequence headers starting - ACCESS-POINT AU's in (S)VCD's etc are sector-aligned. - */ - int nextAU = NextAUType (); - - if ((muxinto.running_out && nextAU == IFRAME && - NextRequiredPTS () > muxinto.runout_PTS) || - (muxinto.sector_align_iframeAUs && nextAU == IFRAME) - ) { - max_packet_payload = au_unsent; - } - - /* Figure out the threshold payload size below which we can fit more - than one AU into a packet N.b. because fitting more than one in - imposses an overhead of additional header fields so there is a - dead spot where we *have* to stuff the packet rather than start - fitting in an extra AU. Slightly over-conservative in the case - of the last packet... */ - - old_au_then_new_payload = muxinto.PacketPayload (*this, buffers_in_header, true, true); - - /* CASE: Packet starts with new access unit */ - if (new_au_next_sec) { - autype = AUType (); - // - // Some types of output format (e.g. DVD) require special - // control sectors before the sector starting a new GOP - // N.b. this implies muxinto.sector_align_iframeAUs - // - if (gop_control_packet && autype == IFRAME) { - OutputGOPControlSector (); - } - - if (dtspts_for_all_au && max_packet_payload == 0) - max_packet_payload = au_unsent; - - PTS = RequiredPTS (); - DTS = RequiredDTS (); - actual_payload = - muxinto.WritePacket (max_packet_payload, - *this, NewAUBuffers (autype), PTS, DTS, NewAUTimestamps (autype)); - - } - - /* CASE: Packet begins with old access unit, no new one */ - /* can begin in the very same packet */ - - else if (au_unsent >= old_au_then_new_payload || - (max_packet_payload != 0 && au_unsent >= max_packet_payload)) { - actual_payload = muxinto.WritePacket (au_unsent, *this, false, 0, 0, TIMESTAMPBITS_NO); - } - - /* CASE: Packet begins with old access unit, a new one */ - /* could begin in the very same packet */ - else { /* if ( !new_au_next_sec && - (au_unsent < old_au_then_new_payload)) */ - /* Is there a new access unit ? */ - if (Lookahead () != 0) { - autype = NextAUType (); - if (dtspts_for_all_au && max_packet_payload == 0) - max_packet_payload = au_unsent + Lookahead ()->length; - - PTS = NextRequiredPTS (); - DTS = NextRequiredDTS (); - - actual_payload = - muxinto.WritePacket (max_packet_payload, - *this, NewAUBuffers (autype), PTS, DTS, NewAUTimestamps (autype)); - } else { - actual_payload = muxinto.WritePacket (0, *this, false, 0, 0, TIMESTAMPBITS_NO); - } - - } - ++nsec; - buffers_in_header = always_buffers_in_header; -} - - -/*********************************************** - OutputControlSector - Write control sectors prefixing a GOP - For "normal" video streams this doesn't happen and so represents - a bug and triggers an abort. - - In DVD's these sectors carry a system header and what is - presumably indexing and/or sub-title information in - private_stream_2 packets. I have no idea what to put in here so we - simply pad the sector out. -***********************************************/ - -void -VideoStream::OutputGOPControlSector () -{ - abort (); -} - - /****************************************************************** - * OutputGOPControlSector - * DVD System headers are carried in peculiar sectors carrying 2 - * PrivateStream2 packets. We're sticking 0's in the packets - * as we have no idea what's supposed to be in there. - ******************************************************************/ - -void -DVDVideoStream::OutputGOPControlSector () -{ - muxinto.OutputDVDPriv2 (); -} - - -/* - * Local variables: - * c-file-style: "stroustrup" - * tab-width: 4 - * indent-tabs-mode: nil - * End: - */ |